JP2012081369A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crusher which can increase working efficiency by automatically setting driving conditions according to characteristics of a material to be crushed.SOLUTION: The crusher includes: a crushing device 13 for crushing a material W to be crushed; a conveyor 12 for transporting the material W to the crushing device 13; a press roller 24 facing the conveyance surface of the transporting conveyor 12; a press cylinder 29 for pressing the press roller 24 on the material W on the transporting conveyor 12; a calculating section 78 for pressing load, measuring the load of the press cylinder 29 when the press cylinder 29 is driven to press the press roller 24 on the material W a hardness determination section 79 for determining the hardness of the material W from the load of the press cylinder 20; and a changing section 84 for crushing conditions, changing crushing conditions according to the determination result of the hardness determination section 79.

Description

  The present invention relates to a crusher for crushing various objects to be crushed, such as thinned wood, waste wood, construction waste, etc., mainly for the reuse and volume reduction of waste.

  When the load pressure of the hydraulic motor that drives the crushing device exceeds the threshold value for a set time, it is determined that the crushing device is overloaded, and the crushing device is interrupted and crushing is stopped. There are crushers equipped with a function to reduce the load on the apparatus. However, in this type of crusher, if the set time for determining an overload condition is constant, the quality of the material to be crushed (hardness, etc.) may require a reduction in particle size quality or frequency of interruption. Since problems such as the increase described above may occur, an apparatus including setting means capable of manually setting the setting time is proposed (see Patent Document 1).

JP 2006-175393 A

  However, since the setting means described in Patent Document 1 is arbitrarily operated by the operator, setting of the setting time depends on the subjectivity and experience of the operator. For this reason, an appropriate setting time in which the ability of the crusher is effectively exhibited is not necessarily selected, and an inexperienced operator or the like may be at a loss in setting the setting time.

  In addition, this type of crusher is usually operated by a heavy machinery operator who inputs the material to be crushed, and every time the properties of the material to be crushed change while paying attention to the operation status of the crusher. It is cumbersome and burdensome for the operator to interrupt the operation of heavy machinery and change the set time.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a crusher that can automatically set operating conditions in accordance with the properties of a material to be crushed and improve work efficiency.

  In order to achieve the above object, the first invention comprises a crushing device for crushing a material to be crushed, a feed conveyor for conveying the material to be crushed to the crushing device, and a pressing means facing the conveying surface of the feed conveyor. , A pressure driving device that presses the pressing means against the object to be crushed on the feed conveyor, and a pressure that measures the load of the pressure driving device when the pressing means is pressed against the object to be crushed by driving the pressure driving device. A load measuring means, a hardness determining means for determining the hardness of the object to be crushed from the measurement result of the pressing load measuring means, and according to the determination result of the hardness determining means, the driving speed of the crushing device, the driving of the feed conveyor Crushing condition changing means for changing at least one of the speeds is provided.

  According to a second invention, in the first invention, the crushing load measuring means for measuring the load of the crushing drive device for driving the crushing apparatus, and the measurement value of the crushing load measuring means are continuously set for a preset time. Supply interruption command means for interrupting the supply operation of the object to be crushed to the crushing device by the feed conveyor when the threshold is exceeded, and supply of the object to be crushed by the feed conveyor based on a command from the supply interruption instruction means Hardness determination command means for driving the pressure drive device while pressing the pressing means against the object to be crushed on the feed conveyor and instructing the hardness determination means to determine the hardness of the object to be crushed It is characterized by comprising.

  According to a third invention, in the second invention, at the time of executing the hardness determination of the object to be crushed, at least one of the threshold value and the set time used by the supply interruption commanding means for determining the supply interruption of the object to be crushed is used. The method further comprises interruption condition changing means for changing according to the determination result of the hardness determination means.

  According to a fourth invention, in any one of the first to third inventions, the pressing from the conveying surface of the feed conveyor when the pressing driving device is driven and the pressing means is pressed against the object to be crushed. Further comprising height measuring means for measuring the height of the means, wherein the crushing condition changing means is based on the measurement result of the height measuring means together with the determination result of the hardness determining means, At least one of the drive speeds of the feed conveyor is changed.

  According to a fifth invention, in any one of the first to fourth inventions, further comprising a manual pressing operation means for manually driving the pressing drive device and pressing the pressing means against an object to be crushed. Features.

  According to the present invention, the operating conditions can be automatically set according to the properties of the material to be crushed, and the working efficiency can be improved.

It is a side view showing the whole crusher structure concerning one embodiment of the present invention. It is a top view showing the whole crusher structure concerning one embodiment of the present invention. It is the side view which extracted and represented the principal part inside the crusher main-body part with which the crusher which concerns on one Embodiment of this invention was equipped. It is the circuit diagram which extracted and represented the principal part of the drive system with which the crusher which concerns on one Embodiment of this invention was equipped. It is a functional block diagram of the control apparatus with which the crusher which concerns on one Embodiment of this invention was equipped. It is a figure showing a mode that the press roller is pressing the to-be-crushed object, and is a figure corresponding to FIG. It is a flowchart showing the change procedure of crushing conditions etc. by the control apparatus with which the crusher which concerns on one Embodiment of this invention was equipped.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing the overall structure of a crusher according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. In the present specification, the right and left in FIG.

  The crusher illustrated in FIG. 1 and FIG. 2 is a machine that crushes a material to be crushed mainly for reuse and volume reduction of waste. Examples of shredders to be shredded, that is, shredded materials, include pruned branches and thinned wood that occur in forests, wood such as waste wood that is generated when buildings are demolished, waste plastic materials, waste tatami, bamboo Waste materials other than wood, including construction waste materials such as In addition, the wood is not limited to relatively dry and hard wood, and may include soft wood with a large amount of water such as roadside tree branches and roadside weeds shortly after pruning. In the present embodiment, these objects to be crushed are collectively referred to as objects to be crushed.

  The crusher includes a traveling body 1 for allowing the machine to travel by itself, a crusher body 2 that receives and crushes the object to be crushed, and discharges the crushed material that has been crushed by the crusher body 2 to the outside. A conveyor 3 and a power unit (power unit) 4 having an engine as a power source of each mounted device are provided.

  The traveling body 1 includes a track frame 5, driving wheels 6 and driven wheels 7 provided at both front and rear ends of the track frame 5, a driving device (traveling hydraulic motor) 8 having an output shaft connected to the shaft of the driving wheel 6, and driving A crawler belt (endless track crawler belt) 9 is provided around the wheel 6 and the driven wheel 7. A main body frame 10 extending forward and backward is provided on the track frame 5, and the main body frame 10 supports the crusher main body 2, the discharge conveyor 3, the power unit 4, and the like.

  The crusher body 2 includes a crushing device 13 (see FIG. 3 to be described later) for crushing the material to be crushed, a hopper 11 for feeding the material to be crushed, a feed conveyor 12 accommodated in the hopper 11, and a feed conveyor 12 At the same time, a pressing roller device 14 constituting a supply device for supplying the object to be crushed to the crushing device 13 is provided. The configuration of the crusher main body 2 will be described later.

  The discharge conveyor 3 includes a conveyor frame 50, driving wheels and driven wheels (not shown) provided at both front and rear ends of the conveyor frame 50, a conveyor belt (not shown) wound between the driving wheels and the driven wheels, and a conveyor belt. A conveyor cover 51 attached to the conveyor frame 50 so as to cover the upper side of the conveyor surface, a driving device (hydraulic motor for discharge conveyor) 52 for rotating and driving the driving wheels to drive the conveyor belt in a circulating manner, and the like. This discharge conveyor 3 has a downstream side (front side) portion supported by a support member 53 extending forward from the support portion of the power unit 4, and an upstream side (rear side) end portion supported by the main body frame 10 via a support member 54. Each of them is suspended and extends almost horizontally from the lower part of the crushing device 13 (see FIG. 3 described later) between the left and right crawler belts 9 and bends in two stages around the lower part of the power unit 4. It turns upward and extends to a position as high as possible within the restricted transport range. However, the first conveyor extending linearly from the lower side of the crushing device 13 to the front side in the lower region of the main body frame 10 without using the bent conveyor and the lower side of the discharge end of the first conveyor to the front side. In some cases, the second conveyor that rises in a straight line is a transit type discharge conveyor.

  The power unit 4 is mounted on the front portion of the main body frame 10 via a support member 55. A driver's seat 56 is provided in a section on the rear side of the power unit 4 and on one side in the body width direction (right side in the present embodiment). The driver's seat 56 is provided with an operation lever 57 for operating the crusher. The operation device for traveling operation may use a wired or wireless remote control instead of providing the operation lever 57 in the driver's seat 56 as in this embodiment. Further, an operation panel 58 is provided below the power unit 4 and on one side in the body width direction (right side in the present embodiment) for performing body operations other than the traveling operation, setting, monitoring, and the like. In the present embodiment, the operation panel 58 is provided on the side of the machine body so that the operator can easily operate from the ground, but may be provided on the driver's seat 56.

  FIG. 3 is a side view showing a main part extracted from the crusher main body 2.

  As shown in FIG. 3, the hopper 11 is a bottomed frame body that is open at the top and front, and is installed horizontally at the rear of the main body frame 10.

  The feed conveyor 12 includes a driving wheel 16 on the head side in which the rotation shaft 21 extends in the width direction of the machine body, a driven wheel on the tail side (not shown) in which the rotation axis (not shown) extends in the width direction of the machine body, and A position that is provided with a plurality of (four in this embodiment) transport belts (chain belts) 17 wound between the drive wheels 16 and the driven wheels and that faces the lower half of the rear surface of the crushing rotor 15 from the vicinity of the rear end of the machine body. The hopper 11 extends almost horizontally. The driven wheel is provided by a bearing 19 (see FIG. 1) provided at the rear portion of the left and right side wall bodies 18 (see FIG. 1) of the hopper 11, and the driving wheel 16 is provided in a crusher frame 20 constituting the side wall of the crushing device 13. It is supported by a bearing (not shown). The rotating shaft 21 of the driving wheel 16 is coupled to an output shaft of a driving device (not shown) provided on the outer side in the body width direction with respect to the bearing through a coupling or the like. By rotating the driving wheel 16 with the driving device, the conveyor belt 17 is circulated between the driving wheel 16 and the driven wheel.

  The crushing device 13 is mounted at a substantially central position in the front-rear direction of the main body frame 10 so as to be positioned in front of the feed conveyor 12. The crushing device 13 includes the crushing rotor 15 housed in the crushing chamber 27, and an anvil (repulsion plate) 34 that is a repelling plate provided on the inner peripheral wall portion of the crushing chamber 27 so as to protrude toward the crushing rotor 15. Yes. The rotation axis of the crushing rotor 15 is substantially parallel to the axis of the drive wheel 16 of the feed conveyor 12, that is, extends in the body width direction. Further, the crushing rotor 15 has a plurality of crushing bits 36 on the outer peripheral portion. The crushing bit 36 is attached to the front side of the bit holder 35 provided on the outer peripheral surface of the crushing rotor 15 in the forward rotation direction of the rotor (clockwise in FIG. 3) with bolts and nuts 37, and its blade surface (collision surface). Faces forward in the forward rotation direction of the crushing rotor 15. Since the crushing rotor 15 is a rotating body, a predetermined gap is secured between the rotation trajectory surface of the outermost peripheral portion (crushing bit 36) and the anvil 34 that is a stationary body.

  The anvil 34 has a collision surface 39 with which the object to be crushed introduced into the crushing chamber 27 collides, and the collision surface 39 faces the crushing pieces that circulate in the crushing chamber 27 as the crushing rotor 15 rotates. As shown, the curved plate 41 (described later) in the anvil frame 40 is attached to the rear side in the forward rotation direction of the crushing rotor 15. The anvil 34 extends substantially over the entire length in the crushing chamber 27 (from the vicinity of one crusher frame 20 to the vicinity of the other crusher frame 20). The anvil frame 40 that holds the anvil 34 is supported so as to be able to rotate back and forth around a rotation shaft 31 supported by the crusher frame 20 above the rotation shaft 22 of the pressing roller device 14. In some cases, the support block 42 fixed to the inner wall surface of the crusher frame 20 is supported via a shear pin 43 so that the anvil 34 faces the crushing chamber 27. During operation, when an impact load exceeding the allowable shear stress of the shear pin 43 is applied to the anvil 34, the shear pin 43 breaks and the anvil frame 40 is released, and the anvil frame 40 rotates about the rotation shaft 31 as an anvil. 34 is separated from the crushing chamber 27 and the crushing chamber 27 is opened.

  Here, the crushing chamber 27 refers to a space that houses the crushing rotor 15 and crushes the material to be crushed. Specifically, when the downstream end of the feed conveyor 12 is a starting point, the end of the feed conveyor 12, the curved plate 28 (described later), the anvil 34, and the curved plate 41 are sequentially arranged in the forward rotation direction of the crushing rotor 15. The screen (sieving member) 38 is arranged in an arc shape facing the outer peripheral surface of the crushing rotor 15, and a space defined by the feed conveyor 12, the curved plate 28, the anvil 34, the curved plate 41, and the screen 38 is formed. This is a crushing chamber 27.

  The screen 38 is a plate-like sieve member that has a large number of discharge holes (not shown) and is curved in an arcuate shape. The screen 38 is crushed against the lower half of the outer peripheral surface of the crushing rotor 15 (with respect to the curved plate 41). It is detachably held on a screen holder 44 formed in an arc shape so as to face the forward direction of the rotor 15 in the forward rotation direction. Further, a plurality of screens 38 (four in this embodiment) are arranged on the screen holder 44 in the rotational direction of the crushing rotor 15.

  The screen holder 44 that supports the screen 38 is configured to rotate in the vertical direction as the cylinder 47 expands and contracts with a shaft 45 extending in the machine body width direction as a fulcrum, and from the state shown in FIG. It rotates to the position where the screen 38 descends below the crusher frame 20. Accordingly, the screen 38 can be inserted and removed from the lower side of the crusher frame 20 to the left and right.

  The cylinders 47 are, for example, hydraulic cylinders (or electric cylinders), and one cylinder is installed on each of the inner wall surfaces of the left and right crusher frames 20. The left and right cylinders 47 are located on the front side of the crushing device 13, and the bottom side is rotatably connected to a bracket 49 attached to the crusher frame 20, and the rear side with the connecting portion with the bracket 49 as a base end portion It extends to. A slider 48 is attached to the rod tip of the cylinder 47, and this slider 48 is connected to the vicinity of the front end of the screen holder 44 via an arm 46. Both ends of the arm 46 are rotatably connected to the slider 48 and the screen holder 44. As can be seen from FIG. 3, the slider 48 and the arm 46 constitute a link mechanism, and the reciprocating motion of the slider 48 in the front-rear direction accompanying the expansion and contraction of the cylinder 47 passes through the rotation of the arm 46. 44 is converted into vertical movement.

  Note that the length of the screen holder 44 and the arm 46, the front and rear positions of the cylinder 47, and the like are approximately in the tangential direction of the crushing chamber 27 when the screen holder 44 is in a normal posture during operation (the state shown in FIG. 3). It is set so that it rises up to near vertical along it, and it is considered so that the pushing-up force and attitude | position holding force of the screen holder 44 by a link mechanism can be obtained effectively.

  The pressing roller device 14 is rotated by a rotating shaft 22 extending in the body width direction above the front surface of the crushing rotor 15, a support member 23 swingable in the vertical direction about the rotating shaft 22, and the support member 23. A pressure roller 24 that is freely supported and faces the conveying surface near the drive wheel 16 of the feed conveyor 12, and a pressure cylinder 29 that is a hydraulic cylinder that swings the support member 23 of the pressure roller 24 are provided.

  The rotating shaft 22 is rotatably supported by a bearing (not shown) provided on the crusher frame 20.

  The support member 23 includes an arm portion 25 supported by the rotation shaft 22 and a bracket portion 26 for attaching a pressing roller connected to the distal end side of the arm portion 25. A part of the front surface of the pressing roller 24 on the lower surface of the arm portion 25 has an arcuate shape, and a part of the wall surface of the crushing chamber 27 is opposed to the outer peripheral surface of the pressing roller 24 in the arc-shaped part. The curved plate 28 is attached.

  The pressing cylinder 29 presses the pressing roller 24 against the object to be crushed on the feed conveyor 12 when measuring the hardness of the object to be crushed, or rotates the support member 23 upward during maintenance, etc. 27, the bottom side end of the bracket 30 fixed to the crusher frame 20 via a beam provided at an upper position near the front end of the arm 25, and the rear end of the upper surface of the arm 25 The rod-side end portion is connected to the bracket 32 provided to be rotatable.

  The size of the pressing roller 24 in the axial direction (the direction orthogonal to the paper surface in FIG. 3) is set to be approximately the same as or slightly larger than the width of the conveying surface of the feed conveyor 12. The pressing roller 24 accommodates a driving device (not shown) in the feed roller 24 in a direction (counterclockwise in FIG. 3) that rolls on an object to be crushed and conveyed by the feed conveyor 12 by the driving device. The rotary drive is driven at a peripheral speed synchronized with the transport speed of 12.

  FIG. 4 is a circuit diagram showing the main part of the driving system for the crusher of this embodiment, specifically, the supply system of the object to be crushed, that is, the feed conveyor 12, the pressing roller device 14, and the driving system of the crushing device 13. It is.

  As shown in FIG. 4, the crusher drive system of this embodiment includes a tank 60, at least one hydraulic pump (not shown) that sucks up and discharges the hydraulic oil in the tank 60, and the hydraulic oil from the hydraulic pump. A control valve 61-64 for controlling the flow (direction and flow rate), the pressing cylinder 29 for swinging the support member 23 of the pressing roller device 14 up and down, a pressing roller motor 65 which is a hydraulic motor for rotationally driving the pressing roller 24, A crushing rotor motor 66 that is a hydraulic motor that rotationally drives the crushing rotor 15, a feed conveyor motor 67 that is a hydraulic motor that rotationally drives the drive wheels 16 of the feed conveyor 12, and a hydraulic oil supply line from the control valve 61 to the pressing cylinder 29. Is provided with an open valve 68 that communicates with or shuts off the tank 60 and a control device 70 that controls the drive system.

  The tank 60 stores hydraulic oil, and FIG. 4 shows only the connection relationship with the system of the pressing cylinder 29 via the release valve 68, but the pressing cylinder 29, the pressing roller motor 65, All hydraulic drive units mounted on the crusher, including the crushing rotor motor 66 and the feed conveyor motor 67, operate with the hydraulic oil stored in the tank 60, and the hydraulic oil that has driven the hydraulic drive unit returns to the tank 60. It is a configuration.

  In the present embodiment, the pressure sensor 71 is provided in the hydraulic oil conduit connected to the oil chamber on the bottom side of the pressing cylinder 29. Further, the pressing cylinder 29 is provided with a stroke sensor 72 for detecting the extension amount of the rod. The stroke sensor 72 is, for example, a sensor that detects a scale provided on the rod of the pressing cylinder 29. For example, a magnetic scale is provided on the rod, the magnetic scale is detected by the magnetic sensor, and a non-magnetic scale is provided on the rod. A device that detects this nonmagnetic scale with an optical sensor can be applied. Further, a pressure sensor 73 is also provided in the hydraulic oil pipe connected to the crushing rotor motor 66.

  The control valves 61-64 are, for example, electromagnetic proportional drive type hydraulic pilot three-position switching valves that control the flow (direction and flow rate) of hydraulic oil discharged from the hydraulic pump. It plays the role of supplying to the crushing rotor motor 66 and the feed conveyor motor 67. In addition, when it can replace with an electromagnetic control type electric control valve instead of an electromagnetic hydraulic pilot system, and a control valve of a system switched and driven by hydraulic pressure, they can also be used for the control valves 61-64.

  At this time, an open conduit 59 connected to the tank 60 branches off from the hydraulic fluid conduit that connects the rod-side and bottom-side oil chambers of the pressing cylinder 29 and the control valve 61. The open valve 68 is a switching valve provided in the open pipe 59 and plays a role of switching the open pipe 59 to either an open state or a shut-off state.

  The control device 70 receives detection signals from the pressure sensor 71, the stroke sensor 72, and the pressure sensor 73, and outputs a command signal to the control valves 61-64 and the like in response to these input signals. 65, a function of controlling driving devices such as the crushing rotor motor 66 and the feed conveyor motor 67 is provided as one function. The control device 70 receives not only detection signals from the sensors 71 to 73 but also operation signals from the operation means such as the operation lever 57 and the operation panel 58 described above. As one of such operation means, FIG. 4 shows a manual pressing operation means 74 for manually driving the pressing cylinder 29 and pressing the pressing roller 24 against the object to be crushed.

  FIG. 5 is a functional block diagram of the control device 70.

  The control device 70 includes an input unit 75, a crushing load calculation unit 76, a height calculation unit 77, a pressing load calculation unit 78, a hardness determination unit 79, a storage unit 80, a timer 81, a supply interruption command unit 82, and a hardness determination command unit 83. The crushing condition changing unit 84, the interruption condition changing unit 85, and the output unit 86 are provided.

  The input unit 75 has a function of inputting detection signals from the detection means such as the pressure sensor 71, the stroke sensor 72, and the pressure sensor 73, and an operation signal from the operation means such as the manual pressing operation means 74.

  The crushing load calculation unit 76 is a calculation processing unit that calculates the load of the crushing rotor motor 66 based on the pressure of the hydraulic oil conduit of the crushing rotor motor 66 detected by the pressure sensor 73. It functions as a crushing load measuring means for measuring. The calculation result of the crushing load calculation unit 76 is output to the storage unit 80 and stored in the storage unit 80.

  The height calculation unit 77 is a calculation processing unit that calculates the height of the lower end portion of the pressing roller 24 from the conveying surface of the feed conveyor 12 based on the detection value of the stroke sensor 72. The height calculation unit 77, together with the stroke sensor 72, drives the pressing cylinder 29 to press the pressing roller 24 against the object to be crushed. The height of the lower end of the pressing roller 24 from the conveying surface of the feed conveyor 12 is as follows. In other words, it constitutes a height measuring means for measuring the height from the upper conveying surface of the object to be crushed on the feed conveyor 12. The calculation result of the height calculation unit 77 is output to the storage unit 80 and stored in the storage unit 80.

  The pressing load calculation unit 78 is a calculation processing unit that calculates the load of the pressing cylinder 29 based on the pressure of the hydraulic oil conduit of the pressing cylinder 29 detected by the pressure sensor 71. The pressure load calculation unit 78, together with the pressure sensor 71, constitutes a pressure load measuring unit that measures the load on the pressure cylinder 29 when the pressure cylinder 29 is driven to extend and the pressure roller 24 is pressed against the object to be crushed. The calculation result of the pressing load calculation unit 78 is output to the storage unit 80 and stored in the storage unit 80.

  The hardness determination unit 79 is a determination processing unit that determines the hardness of the object to be crushed from the measurement result of the pressing load calculation unit 78. The hardness determination unit 79 determines the hardness of the object to be crushed by comparing the measured value of the pressing load with at least one threshold value prepared in advance. As an example, in this embodiment, two threshold values S1 and S2 (S1 <S2) are prepared in advance for the pressing load. For example, if the measured pressing load S is equal to or less than S1 (S ≦ S1). If the pressing load S is greater than S1 and less than or equal to S2 (S1 <S ≦ S2), if the pressing load S is larger than S2 (S> S2), Judged as crushed material. The low hardness exemplified here is a hardness range assuming grass, bark, waste pallets, and the like. The medium hardness is a hardness range assuming demolition materials such as branches and leaves and buildings. High hardness is a hardness range that assumes, for example, logs, trunks, pillar materials, and the like. The determination result of the hardness determination unit 79 is output to the storage unit 80 and stored in the storage unit 80.

  The supply interruption command unit 82 indicates that the crushing device 13 is in an overload state when the measurement result of the crushing load calculated by the crushing load calculating unit 76 exceeds the threshold value Pc0 for a preset time T0. And a command unit that commands the control valves 62 and 64 of the pressure roller motor 65 and the feed conveyor motor 67 to interrupt the operation of supplying the object to be crushed to the crushing device 13 by the feed conveyor 12 and the pressure roller device 14. is there. Specifically, when the supply interruption command unit 82 determines that the crushing device 13 is in an overload state, the supply interruption command unit 82 drives the pressure roller 24 of the pressure roller device 14 and the feed conveyor 12 to rotate in the reverse direction for a short time (set) to be shredded. When the object is extracted from the crushing device and stopped, and then the crushing load falls below the threshold value Pc0 (or when a predetermined set time has elapsed), the pressing roller 24 of the pressing roller device 14 and the feed conveyor 12 are rotated forward again. Drive to resume crushing operation. In the following description, the threshold value Pc0 and the set time T0 for determining whether or not the crushing device 13 is in an overload state are appropriately described as “interruption conditions”.

  When the supply interruption command unit 82 determines that the crushing device 13 is in an overload state, the hardness determination command unit 83 interrupts the supply of the object to be crushed by the feed conveyor based on a command from the supply interruption command unit 82. During the operation, the control cylinder 61 is commanded to extend and drive the pressing cylinder 29, and the pressing roller 24 is pressed against the object to be crushed on the feed conveyor 12, and the hardness of the object to be crushed is determined by the hardness determination means. This is a command unit for commanding the determination. The extension operation of the pressing cylinder 29 serves as a trigger for the above-described measurement operation by the height calculating unit 77 and the pressing load calculating unit 78, and the pressing roller 24 presses the object to be crushed, thereby conveying the object to be crushed. And the hardness of the material to be crushed is determined from the measurement result of the pressure load by the hardness determination unit 79.

  The crushing condition changing unit 84 changes the crushing condition according to the determination result of the hardness of the object to be crushed by the hardness determining unit 79 and the measurement result of the height of the object to be crushed by the height calculating unit 77 (reset). The changed crushing conditions are stored in the storage unit 80. The “crushing conditions” mentioned here are the driving speed of the crushing device 13 (rotational speed of the crushing rotor motor 66), the driving speed of the feed conveyor 12 (driving speed of the feed conveyor motor 67), and the driving speed of the pressing roller 24 (pressing pressure). The driving speed of the roller motor 65). As described above, the crushing condition after the change is referred to when the supply interruption command unit 82 instructs the restart of the crushing operation, and the crushing operation after the restart is executed under the crushing condition after the change. At this time, the storage unit 80 stores a table for determining the relationship between the determination result of the hardness of the object to be crushed, the measurement result of the height of the object to be crushed, and the crushing conditions. When changing the crushing conditions, the table stored in the storage unit 80 is read to select the crushing conditions according to the hardness and height of the object to be crushed. An example of the table is shown in Table 1.

  Here, the height of the object to be crushed in Table 1 is, for example, the maximum rising height of the pressing roller 24 divided into three equal parts, and is divided into “high”, “medium”, and “low” in order from the highest region. . In other words, the height of the object to be crushed when it is “high” is the highest, and “middle” “low” decreases in order. The crushing modes L, M, and H are operation mode names of the crushing device 13, and the relationship between the rotational speeds of the crushing rotor 15 in the crushing modes L, M, and H is L <M <H. Furthermore, the numerical value of the supply speed of the object to be crushed represents the value of what percentage of the maximum value with respect to the maximum value of the driving speed of the feed conveyor 12 and the pressing roller device 14 being 100%. For example, if the scale of the dial for setting the supply speed of the object to be crushed on the operation panel 58 is 10 scales equally from the minimum to the maximum, the combination of (hardness / height of the object to be crushed) is (soft / low) , The supply speed when set to the maximum dial scale (100%), and the crushing condition of crushing mode L. It is as follows when the crushing conditions of Table 1 are put together in dial scale conversion.

(Soft / Low): Dial scale 10 / Fracture mode L
(Soft / Medium): Dial scale 8-9 / Fracture mode L
(Soft / High): Dial scale 7-8 / Fracture mode L
(Medium / Low): Dial scale 7-8 / Fracture mode M
(Medium / Medium): Dial scale 5-6 / Fracture mode M
(Medium / High): Dial scale 3-5 / Fracture mode M
(Hard / Low): Dial scale 5-7 / Fracture mode H
(Hard / Medium): Dial scale 3-5 / Fracture mode H
(Hard / High): Dial scale 1-3 / Fracture mode H
In the table illustrated in Table 1, the object to be crushed sets the crushing mode according to the hardness, and the setting is such that the supply speed of the object to be crushed is different depending on the height of the object to be crushed at each hardness. The setting in Table 1 is an example, and it is needless to say that the setting can be appropriately changed including the hardness, height evaluation, the number of sections, and the correspondence with the crushing conditions.

  The interruption condition changing unit 85 is used when the hardness determination of the object to be crushed, that is, when the crushing condition changing unit 84 changes the crushing condition, the interruption condition used by the supply interruption command unit 82 to determine the supply interruption of the object to be crushed. The function of changing (resetting) (threshold value Pc0, set time T0) according to the determination result of the hardness determination unit 79 and the calculation result of the height calculation unit 77 is performed. Is remembered.

  A case where the threshold value Pc0 is changed will be described as an example. A plurality of values (here, threshold values Pc0L and Pc0H (Pc0L <Pc0H)) are prepared as the threshold value Pc0, and the hardness determination unit When the hardness of the object to be crushed is evaluated as “low hardness” or “medium hardness” according to 79, a low threshold value Pc0L is set, and when it is evaluated as “high hardness”, a high threshold value Pc0H is set. It is the point. Of course, the number of threshold values to be prepared is not limited. For example, three threshold values Pc0L, Pc0M, and Pc0H (Pc0L <Pc0M <Pc0H) are prepared, and “high hardness”, “medium hardness”, “low” are prepared. It is also conceivable to assign threshold values Pc0H, Pc0M, and Pc0L to “hardness”, respectively.

  Of course, instead of changing the threshold value Pc0, the set time T0 may be changed. In this case, a plurality of values (here, set times T0S, T0L (T0S <T0L)) are prepared as the set time T0, and the hardness of the object to be crushed is “low hardness” or When it is evaluated as “medium hardness”, a short set time T0S is set, and when it is evaluated as “high hardness”, a long set time T0L is set. Of course, the number of set times to be prepared is not limited. For example, three set times T0S, T0M, T0L (T0S <T0M <T0L) are prepared, and “high hardness”, “medium hardness”, “low hardness” are prepared. It is also conceivable that threshold values T0L, T0M, and T0S are assigned to.

  Furthermore, the interruption condition may be set more finely and stepwise by not only one of the threshold value Pc0 and the set time T0 but also a combination of both. Alternatively, not only the hardness evaluation of the object to be crushed but also an appropriate combination of the threshold value Pc0 and the set time T0 with respect to the combination of the hardness and height of the object to be crushed as in the crushing conditions described in Table 1 above. A configuration in which each is associated is also conceivable.

  As for the relationship between the interruption condition and the interruption operation, the interruption condition is easily satisfied (that is, the control reaction becomes sensitive) by lowering the threshold value Pc0, shortening the set time T0, or both. Therefore, the validity tends to increase as an interruption condition for a relatively hard object to be crushed. On the other hand, by increasing the threshold value Pc0, extending the set time T0, or both, it becomes difficult to satisfy the interruption condition (that is, the control reaction becomes insensitive), so interruption for a relatively soft object to be crushed There is a tendency to increase the validity as a condition.

  The storage unit 80 is a set condition as a result of calculation and determination by the crushing load calculating unit 76, the height calculating unit 77, the pressing load calculating unit 78, the hardness determining unit 79, the crushing condition changing unit 84, and the interruption condition changing unit 85. In addition, information necessary for various calculations and determinations (table 1 in Table 1) is stored.

  The output unit 86 outputs command signals from the supply interruption command unit 82, the hardness determination command unit 83, etc., to the control valves 61-64 and release valves 68 of the pressing cylinder 29, the pressing roller motor 65, the crushing rotor motor 66, and the feed conveyor motor 67. It plays the role of outputting to etc.

  Next, the operation of the crusher of the present embodiment having the above configuration will be described.

  First, the basic operation of the crusher, that is, the operation during the crushing operation will be described with reference to FIG.

(1) Basic operation When the object to be crushed W is put into the hopper 11 by a heavy machine (hydraulic excavator or the like) equipped with an appropriate work tool such as a grapple, the object to be crushed W is placed on the transport belt 17 of the feed conveyor 12. It is conveyed toward the crushing device 13. When the object to be crushed reaches the position in front of the crushing device 13, the pressing roller 24 of the pressing roller device 14 rides on the object to be crushed W as shown in FIG. The object to be crushed W is pressed against the 12 conveying surfaces. The pressing roller 24 rotates in synchronization with the conveying speed of the feed conveyor 12, and the object W to be crushed is sandwiched between the conveying belt 17 and the pressing roller 24, and the crushing chamber 27 is cooperated by the feeding conveyor 12 and the pressing roller device 14. Is pushed into. The object to be crushed W fed into the crushing chamber 27 protrudes toward the crushing rotor 15 in a cantilever shape with a portion sandwiched between the pressing roller 24 and the conveyor belt 17 as a fulcrum. As indicated by the arrows in FIG. 6, the crushing rotor 15 rotates in the direction in which the crushing bit 36 collides with the object to be crushed W from below (clockwise in FIG. 6). 24.

  The object to be crushed W pushed into the crushing rotor 15 is gradually crushed from the tip (primary crushing) by the crushing bit 36 of the crushing rotor 15 that collides at high speed from below while being pressed from above by the pressing roller 24. ) The fragment to be shredded in this way and spun up in the crushing chamber 27 collides with the anvil 34 and is further crushed (secondary crushing) by the impact force. Of the crushed pieces that are secondarily crushed, those that are already small enough to pass through the screen pass through the screen 38 and are discharged, while those that do not pass through the crushing rotor 27 rotate around the crushing chamber 27. Further, it is further crushed (tertiary crushing) in response to a collision action, a shearing action, a crushing action and the like with the inner wall surface of the crushing chamber 27 such as the anvil 34, the crushing bit 36, and the screen 38. Of the crushed pieces that have been circulated, the crushed pieces that have undergone tertiary crushing and have been refined to a size that passes through the eyes of the screen 38 are sequentially passed through the screen 38 and discharged from the crushing device 13. The crushed material discharged from the crushing device 13 falls onto the discharge conveyor 3 through a chute (not shown), and is carried out of the machine by the discharge conveyor 3.

  Next, the operation of determining the hardness of the object to be crushed and setting the crushing conditions will be described with reference to FIG. FIG. 7 is a flowchart showing a procedure for changing the crushing conditions and the like by the control device 70.

(2) Changing operation of crushing conditions (Step 101)
When the start of the crushing operation is instructed, the control device 70 starts the control procedure of FIG. 7, inputs the detection signals of the stroke sensor 72 and the pressure sensor 71 before starting the crushing operation, and the initial length of the pressing cylinder 29. L0 (see FIG. 3) and initial pressure P0 are calculated and stored in the storage unit 80, respectively.

(Step 102)
The control device 70 drives each of the discharge conveyor 3, the crushing device 13, the feed conveyor 24, and the pressing roller 24 according to the current crushing conditions read from the storage unit 80 (or crushing conditions input by the operation panel 58). A command signal is output to the control valve of the apparatus, and the crushing operation is started by driving the discharge conveyor 3, the crushing device 13, the feed conveyor 24, and the pressing roller 24 (the driving speed of the discharge conveyor 3 is constant). The operation after the start of the crushing operation is as described in “(1) Basic operation”. During the crushing operation, the control valves 62-64 of the pressing roller motor 65, the crushing rotor motor 66, and the feed conveyor motor 67 shown in FIG. The hydraulic oil is supplied to the motors 65-67 at a corresponding opening degree. Although not shown in FIG. 4, the same applies to the discharge conveyor 3. On the other hand, with respect to the pressing cylinder 29, the control valve 61 is set to a position where the hydraulic oil supply line to the pressing cylinder 29 is shut off, and the opening valve 68 is set to a position where the opening pipe 59 communicates with the tank 60. The cylinder 29 is in a free state, and the weight of the pressing roller device 14 is applied to the object to be crushed W as described above.

(Step 103)
The control device 70 determines whether or not there is an operation input from the manual pressing operation means 74 by manually operating the manual pressing operation means 74 during the crushing operation. If there is no input, the procedure proceeds to step 104, and if there is an input, the procedure proceeds to step 107 (described later).

(Step 104)
The control device 70 inputs a detection signal (crush load signal) from the pressure sensor 73, calculates the crush load Pc by the crush load calculation unit 76, and stores it in the storage unit 80.

(Step 105)
The control device 70 determines whether or not the crushing load Pc exceeds the threshold value Pc0. If the crushing load Pc is equal to or less than the threshold value Pc0, the procedure is returned to step 103. If the crushing load Pc exceeds the threshold position Pc0, it is determined that the crushing device 13 is in an overload state and time measurement by the timer 81 is started. Then, the procedure proceeds to step 106.

(Step 106)
The control device 70 determines whether or not the set time T0 has elapsed since the crushing load Pc exceeds the threshold value Pc0 (whether or not the interruption condition is satisfied). If the set time T0 has not elapsed, the procedure returns to step 105. If the crushing load Pc has returned to the threshold value Pc0 or less at that time, the procedure returns to step 103. If the set time T0 has elapsed with the crushing load Pc exceeding the threshold value Pc0, that is, if the interruption condition is satisfied, the procedure proceeds to step 107.

(Step 107)
The control device 70 commands the supply interruption command unit 82 to interrupt the supply operation of the object to be crushed, and instructs the hardness determination command unit 83 to execute hardness determination of the object to be crushed, that is, to press the object to be crushed.

  The supply interruption command unit 82 instructs the control valves 62 and 64 of the pressure roller motor 65 and the feed conveyor motor 67 to reversely drive the pressure roller 24 and the feed conveyor 12 of the pressure roller device 14 for a short time (set time). The pressure roller 24 and the feed conveyor 12 are stopped after the object to be crushed is brought out of the crushing device 13. Alternatively, it is simply stopped without being driven in reverse.

  The hardness determination command unit 83 instructs the control valve 61 of the pressing cylinder 29 to drive the extension of the pressing cylinder 29, and presses the pressing roller 24 against the object to be crushed on the conveying surface of the feed conveyor 12 that is stopped. Instructs the determination of hardness and height. At this time, the hardness determination command unit 83 outputs a command signal to the open valve 68 to block the open pipe 59 and outputs a command signal to the control valve 61 to extend the pressing cylinder 29. When the open line 59 is blocked, the pressing cylinder 29 is released from the free state, and is in a state where it can be extended and contracted with hydraulic oil from the hydraulic pump.

(Step 108)
In step 107, when the pressing cylinder 29 is extended and the pressing roller 24 is pressed against the object to be crushed, the control device 70 starts the measuring operation by the height calculation unit 77. The height calculator 77 calculates the current length L (see FIG. 6) of the pressing cylinder 29 based on the detection signal of the stroke sensor 72, and presses from the conveying surface of the feed conveyor 12 based on this length L. The height H (see FIG. 6) of the lower end of the roller 24 is calculated and stored in the storage unit 80. As a calculation method, for example, the initial length L0 of the pressing cylinder 29 is read from the storage unit 80, a deviation ΔL (= L0−L) between the current length L and the initial length L0 is calculated, and ΔL is fed to the conveyor 12 The case where it converts into the height H (refer FIG. 6) of the lower end part of the press roller 24 from the conveyance surface of this, ie, the thickness of a to-be-crushed object, can be illustrated. It is also conceivable to directly convert the length L to the height H without obtaining the deviation ΔL.

  Taking the evaluation category in Table 1 as an example, the height calculator 77 evaluates the calculated height H as “high”, “medium”, and “low”, and stores it in the storage unit 80.

(Step 109)
In step 107, when the pressing cylinder 29 is extended and the pressing roller 24 is pressed against the object to be crushed, the control device 70 executes the measuring operation by the pressing load calculating unit 78 in parallel with the height measuring operation. . The pressing load calculation unit 78 calculates the current pressure P of the pressing cylinder 29 based on the detection signal from the pressure sensor 71, calculates the pressing load S based on the pressure P, and stores it in the storage unit 80. As an example of the calculation method, for example, the initial pressure P0 of the pressing cylinder 29 is read from the storage unit 80, and the deviation ΔP (= P−P0) between the current pressure P and the initial pressure P0 is converted into the pressing force of the pressing cylinder 29. it can. It is also conceivable to convert the pressure P into the pressing load S without obtaining the deviation ΔP.

  Taking the evaluation classification in Table 1 as an example, the pressing load S calculated by the pressing load calculation unit 78 is classified into “high hardness”, “medium hardness”, and “low hardness” by the hardness determination unit 79, and the storage unit 80. Is remembered.

(Step 110)
When the height and hardness of the object to be crushed are calculated, the control device 70 changes the crushing condition and the interruption condition by the crushing condition changing unit 84 and the interruption condition changing unit 85 according to the determination results of steps 107 and S108.

  Specifically, the crushing condition changing unit 84 changes the crushing conditions according to the determination result of the hardness of the object to be crushed by the hardness determining unit 79 and the height evaluation result of the object to be crushed by the height calculating unit 77, The changed crushing conditions are stored in the storage unit 80. In the present embodiment, the crushing conditions are set in the table shown in Table 1 above.

  The interruption condition changing unit 85 changes the interruption condition as described above according to the determination result of the hardness determination unit 79 and the evaluation result of the height calculation unit 77, and stores the changed interruption condition in the storage unit 80. .

(Step 111)
When the crushing condition and the interruption condition are changed in step 110, the control device 70 causes the pressing roller 24 and the feed conveyor 12 to stand by in a stopped state until the crushing load Pc becomes the threshold value Pc0 or less, and Pc ≦ Pc0. After returning to the state, the procedure proceeds to step 112. Note that the threshold value Pc0 used for determination in step 111 has been changed, although the value before execution of step 110 is maintained (the same value is reset in step 110). (In some cases, the setting is changed to a large value or a small value in step 110). Therefore, the time required to satisfy Pc ≦ Pc0 can vary depending on the threshold value after the change.

(Step 112)
In step 112, the control device 70 determines whether or not an operation for ending the crushing operation has been performed on the operation panel 58 or the like, and if there is no instruction to end, the procedure returns to step 102 to restart the crushing operation. When restarting the crushing operation, the control device 70 reads out the crushing conditions changed in Step 110 from the storage unit 80, and according to the changed crushing conditions, the discharge conveyor 3, the crushing device 13, the feed conveyor 24, and the press A command signal is output to the control valve of each driving device of the roller 24, and the crushing operation is started by driving the discharge conveyor 3, the crushing device 13, the feed conveyor 24, and the pressing roller 24 (the driving speed of the discharge conveyor 3 is constant). To do). The pressing cylinder 29 returns to a free state.

  If execution of the crushing operation has already been instructed at the time of execution of step 112, the control device 70 stops the crushing device 13 and the discharge conveyor 3 and ends the procedure of FIG.

  The effect by the crusher of this embodiment is demonstrated.

  First, according to the present embodiment, when the property or size of the object to be crushed is changed, the crushing condition is appropriately changed according to the change. As a result, the occurrence of an overload state is suppressed, the frequency of interruption of the crushing operation is reduced, and the work efficiency is improved. Further, when the interruption condition is appropriately changed not only according to the crushing condition but also depending on the property and size of the object to be crushed, further improvement in work efficiency can be expected by optimizing the crushing operation interruption time. For example, when a hard object to be crushed is used and the time setting for overload judgment is long for the hardness of the object to be crushed, the rotation speed of the crushing rotor is lowered for a while due to crushing resistance. If the crushing operation can be continued, the particle size quality of the crushed material may be reduced. In addition, when targeting a soft object to be crushed, if the time setting for overload judgment is short for the hardness of the object to be crushed, the control becomes too sensitive and the crushing operation is interrupted more than necessary. The work efficiency may be reduced. On the other hand, in this embodiment, the change in the interruption condition according to the property and size of the object to be crushed can suppress the reduction in the particle size quality and work efficiency of the crushed object.

  At this time, in this embodiment, the crushing conditions and the like are automatically set according to the properties of the material to be crushed without forcing the operator to select appropriate crushing conditions and interruption conditions (hereinafter referred to as “crushing conditions”). By doing so, work efficiency can be improved. Therefore, the crushing conditions are not affected by the operator's subjectivity and experience, the crushing machine can be operated with highly relevant crushing conditions, and the operator is not bothered by setting the crushing conditions. . In addition, the operation of the crusher is often handled by the operator of the input heavy machine, and it is a burden on the operator to monitor the operation status of the crusher, the properties of the material to be crushed, and to change the setting of crushing conditions, This embodiment also contributes to reducing the burden on the operator.

  In addition, the crusher of the present embodiment is different from, for example, supplying the object to be crushed to the crushing apparatus while monitoring the load of the crushing rotor and feeding back to the crushing conditions. It is an important merit in configuration that the property and size of the object can be monitored and the crushing conditions and the like can be changed according to the property of the object to be crushed before supply.

  Furthermore, the pressure cylinder 29 is freed during normal crushing operation, and the pressure roller 24 rides on the object to be crushed, whereas the pressure cylinder 29 is driven to extend when changing crushing conditions and the like. In order to positively press the pressing roller 24 against the object to be crushed, it is preferable to execute the changing operation of the crushing conditions separately from the normal crushing operation. However, for example, if the crushing operation is interrupted at regular intervals and the crushing conditions are changed, the crushing operation is interrupted even if the crushing conditions etc. are not changed, thereby reducing the work efficiency. There is also a possibility of end. In addition, a configuration in which the object to be crushed is pressed with a constant pressing force without releasing the pressing cylinder 29 during the crushing operation, and a configuration in which crushing conditions and the like are changed at any time or every certain time during the crushing operation is also conceivable. There is a risk that the amount of data processing will increase more than necessary, crushing conditions, etc. will be changed excessively.

  On the other hand, in the present embodiment, the crushing condition is obtained by executing the changing operation such as the crushing condition in the meantime by using the opportunity that the crushing device 13 is overloaded and the supply operation of the object to be crushed is interrupted. Therefore, the crushing operation is not interrupted more than necessary due to the changing operation, and the work efficiency is not lowered. In addition, the fact that the crushing conditions are not suitable for the properties and quantity of the material to be crushed is one reason that the crushing operation is interrupted, so the crushing conditions etc. are automatically reviewed when the crushing operation is interrupted. That is reasonable. In addition, since the changing operation of the crushing conditions and the like is executed in a timely manner, the amount of data processing can be suppressed, and the crushing conditions and the like are not changed excessively.

  In the above embodiment, the stroke sensor 72 of the pressing cylinder 29 is used to measure the height of the object to be crushed. For example, the angle of the stroke sensor 72 of the pressing roller device 14 (or another joint) is set. A sensor can be installed, and the height of the object to be crushed (the angular attitude of the support member 23) can be measured based on the detection signal of the angle sensor.

  Moreover, although the crushing condition change part 84 took the structure which sets crushing conditions based on the calculation result of the height calculating part 77 with the determination result of the hardness determination part 79, the magnitude | size of a to-be-crushed object is comparatively uniform. For example, when the supply amount is stable, the crushing condition may be set based on only the determination result of the hardness determination unit 79 without referring to the calculation result of the height calculation unit 77. Moreover, although crushing condition change part 84 mentioned as an example the case where the driving speed of crushing apparatus 13 and the driving speed of feed conveyor 12 were changed as crushing conditions, either crushing apparatus 13 or feed conveyor 12 was demonstrated. The driving speed may be changed.

  In addition, the case where the interruption condition is changed together with the change of the crushing condition is illustrated, but it is not always necessary to change the interruption condition in accordance with the change of the crushing condition, and the pressing cylinder 29 is extended to press the object to be crushed. It is good also as a structure which changes only the crushing conditions, when pressing with the roller 24. FIG. Moreover, even if the interruption condition is changed together with the crushing condition, it is not always necessary to change both the threshold value Pc0 and the set time T0, and only one of them can be changed.

  Further, the crushing load is measured by the load pressure of the crushing rotor motor 66. For example, a rotation speed sensor that detects the rotation speed of the crushing rotor motor 66 is installed, and the crushing load is measured based on the rotation speed of the crushing rotor motor 66. It can also be configured. Moreover, although each actuating device such as the crushing device 13 and the pressing roller device 14 is hydraulically driven, it can also be electrically driven. When detecting the load of the electric drive device, for example, an overload can be detected based on the load current of the electric motor, so that the operation procedure shown in FIG. 7 can be executed as in the case of the hydraulic drive type. it can.

  In addition, when the supply operation of the object to be crushed is interrupted when the crushing device 13 is overloaded, the feed conveyor 12 and the pressing roller 24 are temporarily reversed and then stopped. It can also be set as the structure which stops the feed conveyor 12 and the press roller 24. FIG. Moreover, although the press roller 24 was illustrated as a press means which presses the to-be-crushed object on the feed conveyor 12, it can also consider using a crawler-shaped press means instead of the press roller 24, for example. Further, as the pressing drive means for pressing the pressing means against the object to be crushed, for example, a motor (hydraulic or electric) connected to the rotating shaft 22 can be used instead of the pressing cylinder 29.

  Furthermore, the case where the present invention is applied to a crusher capable of traveling by itself has been described as an example. Furthermore, the present invention can be applied to a stationary crusher arranged as a fixed machine in a plant or the like.

12 Feed conveyor 13 Crushing device 24 Press roller (pressing means)
29 Press cylinder (Press drive)
71 Pressure sensor (Pressure load measuring means)
72 Stroke sensor (height measuring means)
73 Pressure sensor (Measuring means for crushing load)
74 Manual pressing operation means 76 Crushing load calculation unit (crushing load measuring means)
77 Height calculator (height measuring means)
78 Pressing load calculation unit (pressing load measuring means)
79 Hardness judgment part (hardness judgment means)
82 Supply interruption command section (Supply interruption instruction means)
83 Hardness determination command section (hardness determination command means)
84 Crushing condition changing part (crushing condition changing means)
85 Interruption condition change part (interrupt condition change means)
H Height of object to be crushed Pc Crushing load Pc0 Threshold value S Pressing load T0 Setting time W Object to be crushed

Claims (5)

A crusher for crushing the material to be crushed;
A feed conveyor that transports the material to be crushed to the crushing device;
Pressing means facing the conveying surface of the feed conveyor;
A pressing drive device for pressing the pressing means against the object to be crushed on the feed conveyor;
A pressure load measuring means for measuring the load of the pressure driving device when the pressure driving device is driven and the pressing means is pressed against an object to be crushed;
Hardness determining means for determining the hardness of the object to be crushed from the measurement result of the pressing load measuring means;
A crushing machine comprising crushing condition changing means for changing at least one of the driving speed of the crushing device and the driving speed of the feed conveyor according to the determination result of the hardness determining means. Crushing load measuring means for measuring the load of the crushing driving device for driving the crushing device;
A supply interruption command means for interrupting the supply operation of the object to be crushed by the feed conveyor to the crushing device when the measured value of the crushing load measuring means continuously exceeds a threshold value set for a preset time;
While the supply of the object to be crushed by the feed conveyor is interrupted based on the command from the supply interruption command means, the pressing drive device is driven, and the pressing means is pressed against the object to be crushed on the feed conveyor. The crusher according to claim 1, further comprising a hardness determination command unit that commands determination of the hardness of the object to be crushed by a hardness determination unit.   At the time of executing the hardness determination of the object to be crushed, at least one of the threshold value and the set time used by the supply interruption command unit to determine the supply interruption of the object to be crushed is changed according to the determination result of the hardness determination unit. The crusher according to claim 2, further comprising interruption condition changing means. Further comprising height measuring means for measuring the height of the pressing means from the conveying surface of the feed conveyor when the pressing driving device is driven to press the pressing means against the object to be crushed;
The crushing condition changing means changes at least one of the driving speed of the crushing device and the driving speed of the feed conveyor based on the determination result of the hardness determining means and the measurement result of the height measuring means. The crusher according to any one of claims 1 to 3.   The crusher according to any one of claims 1 to 4, further comprising manual pressing operation means for manually driving the pressing drive device and pressing the pressing means against an object to be crushed.

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