JP2007175575A - Scrap crushing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shredder crushing device capable of easily removing foreign matters when the foreign matters are mixed. <P>SOLUTION: A vibration sensor 8 provided on a shredder body 5 detects the vibration in a crushing chamber 6. When the level of the detected vibration is not less than a reference value, the operation of an upstream unit is stopped to interrupt the feed of new wastes into the crushing chamber 6, and in a predetermined waiting time, normally treated wastes are transferred to the downstream side. When foreign matters successively generate the vibration of the level not less than the reference value in the crushing chamber a plurality of times, a foreign matter discharge port 9 formed in the crushing chamber 6 is opened to automatically remove only the foreign matters. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a scrap crushing apparatus that crushes scraps of, for example, scrap ships and discarded automobiles.

  Waste boat materials, building waste materials, or waste materials generated as a result of machining are not suitable for transportation as they are in terms of size or shape, and materials of various properties are mixed together, and handling is not easy. In order to facilitate the handling and handling of such waste materials, it is effective to cut or crush, and there are various cutting devices and crushing devices (hereinafter referred to as crushing devices). As one of the general shapes of these various crushing apparatuses, there is a housing shape, that is, a crushing process in which waste material is put into a crushing chamber in which a rotating crushing rotor is present.

  When waste materials with hardness or size exceeding the processing capacity of these crushing devices are thrown in, excessive load will be applied to the crushing chamber wall and crushing rotor or its power unit, reducing crushing function and shortening the service life. It leads to. In addition, since such a foreign substance cannot be crushed, it is necessary to stop the operation of the crushing apparatus once and remove the foreign substance manually.

For example, the following technologies are disclosed as techniques for rationalizing the processing when such foreign matters are mixed.
JP-A-7-308844 JP-A-8-24688

  In Patent Document 1, a foreign matter discharge door is provided in a hole formed by cutting out a part of a cylindrical container, which is a pulverization part provided with a pulverization protrusion on the inner periphery, and foreign matters mixed in the chips are crushed in the pulverization part with a hammer or pulverization Abnormal shock vibration that occurs intermittently when jumping by striking with a protrusion is detected using an impact sensor attached near the crushing protrusion mounting part, and abnormal changes in the electrical output of the impact sensor are processed to mechanically There is disclosed a chip crusher characterized in that the foreign matter discharge door is opened instead of the operation.

  In Patent Document 2, a crushing unit is built, a vertical crusher is provided with a supply unit and a drive unit at the top, and a discharge unit is provided at the bottom. There is a crushing material input case provided with a charging case inclined downward on the unit side, with a foreign matter discharge port / inspection port opened on the bottom surface of the above input case and a door for opening / closing the foreign material discharge port / inspection port. It is disclosed.

  According to the technique disclosed in Patent Document 1, foreign matter can be discharged while the crushing operation is continued by opening the foreign matter discharge door, but regular crushed material also flows out from the foreign matter discharge door. there's a possibility that. Also, it is impossible to consistently supply waste materials, crush waste materials, and discharge processed waste materials.

  Further, according to the technique disclosed in Patent Document 2, foreign matter removal in a crushing apparatus that consistently supplies waste material, performs crushing processing, and discharges processed waste material is possible, but it is removal processing in the supply unit until tired. In addition, there is a drawback that the processing is stopped.

  Therefore, the purpose of the present invention is to provide a waste material supply, crushing treatment, and processing waste discharge consistently, in the crushing apparatus to remove foreign matter in the crushing treatment process, without blocking the flow of regular crushed material treatment as much as possible, Another object of the present invention is to provide a crushing apparatus that can be easily performed.

In order to achieve the above object, the present invention has the following configuration.

(1) In a scrap crushing apparatus in which a carry-in conveyor, a feeding roller, and a crushing chamber perform a waste material crushing process, a vibration sensor that detects vibration in the crushing chamber, and a foreign substance drain configured to be openable and closable in the crushing chamber. And when the vibration sensor detects a vibration exceeding a first reference value, the carry-in conveyor and the feeding roller are stopped, and a predetermined number of times within a monitoring time after a predetermined waiting time has elapsed. When the vibration exceeding the second reference value is detected, the foreign matter discharge port is opened, and when the foreign matter is discharged, the foreign matter discharge port is closed, and the stopped carry-in conveyor and feeding roller are rotated forward. Scrap crushing equipment.

  According to this configuration, during the linked operation of the carry-in conveyor, the feeding roller, and the crushing chamber, foreign materials such as iron ingots and H-shaped steel such as waste materials having hardness or size exceeding the crushing capacity of the crushing chamber are mixed. Even in this case, normal waste materials other than the foreign matters already carried into the crushing chamber can be transferred downstream from the crushing chamber, and then the foreign matter removal work in the crushing chamber can be facilitated. It is also possible to automatically discharge foreign matter. Moreover, the stop of the flow of the interlocking crushing process can be stopped to the minimum, which leads to prevention of a decrease in processing capacity. Since the predetermined number of times of vibration detection are the conditions for opening the foreign matter outlet, unnecessary opening of the foreign matter outlet due to sudden vibration detection caused by various causes can be prevented.

(2) In a scrap crushing apparatus in which a carry-in conveyor, a feeding roller, and a crushing chamber perform a waste material crushing process, a vibration sensor that detects vibration in the crushing chamber, and a foreign substance drain configured to be openable and closable in the crushing chamber. And when the vibration sensor detects a vibration exceeding the first reference value, the carry-in conveyor and the feeding roller stop, and the vibration sensor exceeds the second reference value during a predetermined waiting time. If the vibration exceeding the second reference value is detected a predetermined number of times within the monitoring time after the predetermined standby time has elapsed, A scrap crushing device that is opened and closes the foreign matter discharge port when foreign matter is discharged, and the stopped carry-in conveyor and feeding roller rotate normally.

  According to this configuration, after a predetermined waiting time has elapsed, the condition for starting the timing of the predetermined period is the detection of vibration exceeding the second reference value, i.e., the second detection of vibration. It is possible to further reliably prevent the foreign matter discharge port from being unnecessarily opened due to the sudden vibration detection that occurs. Further, the return time when no foreign matter is present can be shortened.

(3) When the vibration sensor does not detect a vibration exceeding the second reference value during the predetermined standby time, the measurement of the confirmation time is further started, and the vibration sensor is activated during the confirmation time. The scrap crushing apparatus according to claim 2, wherein the monitoring time is started even when vibration exceeding a reference value is detected.

  According to this configuration, the second reference value is set during the predetermined waiting time for some reason even though there is a possibility that foreign matter to be discharged still exists due to the disposition state of the waste material in the crushing device. Even when there is no vibration exceeding, it is possible to more reliably detect the presence of foreign matter by additionally having time to detect the presence or absence of vibration, and appropriate foreign matter discharge becomes possible.

(4) In a scrap crushing apparatus in which a carry-in conveyor, a feeding roller, and a crushing chamber perform a waste material crushing process, a vibration sensor that detects vibration in the crushing chamber, and a foreign substance drain configured to be openable and closable in the crushing chamber. And when the vibration sensor detects a vibration exceeding the first reference value, the carry-in conveyor and the feeding roller are stopped, and the vibration exceeding the second reference value is detected a predetermined number of times within the monitoring time. The foreign matter discharge port is opened on the condition that a predetermined waiting time has elapsed, and when the foreign matter is discharged, the foreign matter discharge port is closed, and the stopped carry-in conveyor and feeding roller are rotated forward. And scrap crushing equipment.

  According to this configuration, the predetermined standby time and the monitoring time are started simultaneously, and it is possible to remove foreign matters quickly while reliably transferring normal waste materials to the downstream process.

  (5) The predetermined waiting time is a waiting time for transferring the crushed material other than the foreign matter in the crushing chamber to the downstream from the crushing chamber after the supply of the waste material to the crushing chamber is stopped by the stop of the carry-in conveyor and the feeding roller. It is time, The scrap crushing apparatus in any one of (1) to (4) characterized by the above-mentioned.

  According to this configuration, at the time of detection of the first abnormal vibration, the supply of the waste material to the crushing chamber is stopped, and normal crushed material in the crushing chamber is further transferred to be transferred to the subsequent processing step. Even if the foreign matter is not automatically discharged from the crushing chamber by opening the foreign matter discharge port, it is possible to remove the foreign matter in a state where normal crushed materials are not mixed, which contributes to work efficiency.

  (6) The scrap crusher according to any one of (1) to (5), wherein the second reference value is smaller than the first reference value.

  In the case of contamination, the crushing chamber vibrates greatly due to the impact caused by the collision with the crushing unit, for example, the crushing rotor. Even if the treatment is not performed, it is considered that the subsequent vibration is reduced from the beginning due to the crushing or deformation of the foreign matter. According to this configuration, even in such a case, it is possible to accurately detect the contamination of foreign matters and the overload to the crushing chamber.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a scrap crushing apparatus according to the present invention, and FIG. 2 is a block diagram showing its electrical configuration.
The scrap crushing apparatus in the present embodiment includes a carry-in conveyor 1, a feeding chute 2, feeding rollers 3a and 3b, a shredder main body 5 having a crushing chamber 6, and a vibrating conveyor that transfers the waste material crushed by the shredder main body 5 and performs magnetic separation processing. 11, a magnetic separator 12, a magnetic material conveyor 13, a non-magnetic material conveyor 14 (FIG. 2), and a control device 15 that controls them.

  Waste materials to be crushed by the crushing apparatus according to the present embodiment, such as waste ship materials and building waste materials, or waste materials generated as a result of machining, are conveyed to the crushing chamber 6 through the carry-in conveyor 1. As the carry-in conveyor 1, it is desirable to adopt an apron conveyor that can be inclined and mounted with side guards, but any conveyor can be adopted as long as it can transport the waste material before processing. The operation speed of the carry-in conveyor 1 is adjusted based on a control signal from the control device 15. Thereby, the amount of waste material input to the input chute 2 is controlled.

  The waste material conveyed in the direction of the arrow of the carry-in conveyor 1 is transferred to the input chute 2. Feeding rollers 3 a and 3 b are arranged between the charging chute 2 and the shredder body 5, and play a role of feeding waste materials into the crushing chamber 6. The upper feeding roller 3a is connected to the hydraulic cylinder 4 via a support column and is configured to be movable up and down. Based on a control signal from a control device 15 described later, the upper feeding roller 3a is connected to the lower feeding roller 3b. It plays the role of controlling the amount of waste material flowing into the crushing chamber 6 by adjusting the approaching / separating distance. Furthermore, based on the control signal from the control device 15, the rotation direction of the feeding rollers 3a and 3b is controlled, and the amount of waste material flowing into the crushing chamber 6 can be controlled.

  The waste material transferred to the shredder body 5 by the feeding rollers 3 a and 3 b is crushed in the crushing chamber 6. A crushing rotor 7 is arranged in the crushing chamber 6. The surface of the crushing rotor 7 is provided with a plurality of hammers 7H having a shape suitable for crushing waste materials, and is rotated at a high speed in the clockwise direction in the drawing by a rotor drive motor 7m attached to the rotating shaft. The waste material thrown into the crushing chamber 6 is gradually crushed by repeatedly colliding with the hammer 7H provided on the surface of the crushing rotor 7 and the outer wall of the crushing chamber 6, and the particle size becomes smaller.

  The shredder body 5 is provided with a vibration sensor 8 and detects vibrations generated by the crushing process as needed. In addition, a foreign matter discharge port 9 is provided in the upper part of the crushing chamber 6. The foreign matter discharge port 9 is opened by a foreign matter discharge port solenoid 9S that operates based on a signal from the control device 15 at the time of abnormal vibration described later. Foreign matter to be removed by the rotation of the crushing rotor 7 is released from the crushing chamber 6.

  Waste material that has been crushed to a predetermined particle size or less is discharged from the crushing chamber 6 via the discharge port 10. Waste material that has undergone the crushing process is transferred to the magnetic separator 12 via the vibration conveyor 11. In the magnetic separator 12, the magnetic material and the non-magnetic material are selected. The waste material having magnetism is transferred by the magnetic material conveyor 13, and the waste material not having magnetism is transferred by the non-magnetic material conveyor 14, and then shifts to a nonferrous metal sorting process and a particle size sorting process.

  Next, the electrical configuration of each unit of the control device 15 and the scrap crushing device will be described with reference to FIG.

  The control device 15 plays a role of controlling the operation of each of the above-described components (units) in the scrap crushing device. The control device 15 includes a CPU 21, a ROM 22, and a RAM 23, and is connected to each unit via an I / O port 24.

  The CPU 21 performs arithmetic processing based on the control program stored in the ROM 22 in advance and the operating status of each unit sent via the I / O port, for example, the current value of the rotor drive motor 7m or the vibration value detected by the vibration sensor 8. And a predetermined control signal is transmitted to each unit via the I / O port 24.

  The ROM 22 is a non-volatile storage device, and stores a program for integrated control of the scrap crushing device in advance. Examples of the integrated control include control based on abnormal vibration detection according to the present invention and control based on overload detection of the crushing rotor 7. The control device 15 performs control based on this program.

  The RAM 23 is a volatile storage device, and has a role of storing information that needs to be temporarily stored in the process of controlling the scrap crushing device. In the present invention, for example, storage means for reference values (first reference value and second reference value) for determining whether or not the vibration value detected by the vibration sensor 8 is an abnormal value, each time measurement process It has a function as a counter for storing the timer storage and the number of vibrations at the time.

  Signals transmitted to the control device 15 include, for example, an overload detection signal from the rotor drive motor 7m, a vibration conveyor 11, a magnetic separator 12, a magnetic material conveyor 13, and a non-magnetic material conveyor 14 that carry waste material after crushing. There is an abnormality detection signal. As described above, the control device 15 adjusts the operation of the unit in the upstream process according to the operation state in the downstream unit, and an excessive burden that may lead to damage of the device occurs, or the downstream process (vibrating conveyor 11, magnetic separation) Each unit of the machine 12, the magnetic material conveyor 13 and the non-magnetic material conveyor 14), so that the waste material is not excessively supplied, and further, the operation state can be maintained in an integrated manner without manual operation or visual inspection. Controls the operation of the unit.

  Next, detection and removal processing when foreign matter has flowed into the crushing chamber 6 will be described using the flowcharts shown in FIGS.

As described above, the waste material is crushed by causing the crushing rotor 7 rotating in the crushing chamber 6 to collide with the waste material. The vibration generated at the time of collision is always detected by a vibration sensor 8 installed on the outer wall of the shredder body 5 through the wall of the crushing chamber 6 and the rotation shaft (not shown) of the crushing rotor 7. When the control device 15 receives a signal indicating that the vibration sensor 8 has detected a vibration having an acceleration of a first reference value, for example, 25 m / s ² or more (step S301: YES), the control device 15 uses the I / O port. A signal to stop rotation is issued to the carry-in conveyor 1 and the feeding rollers 3a and 3b via 24 (FIG. 2) (step S302). The installation position of the vibration sensor 8 is not limited to the outer wall of the shredder, and can be installed at any position as long as vibration in the crushing chamber 6 can be detected.

Further, the control unit 15 starts counting the standby time _{t 1} (step S303). Here, the “standby time” refers to normal waste that is mixed in the crushing chamber 6 and is transferred to the downstream process after crushing the waste material to be transferred to the subsequent downstream process. This is the time for leaving only the foreign matter to be removed in the crushing chamber 6. Here, the standby time is set to 5 seconds. Since the crushing rotor 7 continues to rotate while the standby time elapses, waste materials other than the foreign matter in the crushing chamber 6 are finely pulverized and transferred to the downstream process through the discharge port 10.

When 5 seconds as a standby time has elapsed (step S304: YES), at the same time the control unit 15 starts counting the monitoring timer t _2, the counter C for counting the oscillation detection frequency within a time period that is timed by the monitoring timer Reset (step S305). The counter C is stored in a predetermined storage area in the RAM 23 and is added based on a vibration detection signal from the vibration sensor 8 as will be described later.

The control device 15 monitors whether or not a signal indicating that abnormal vibration has occurred from the vibration sensor 8, that is, a signal indicating that a vibration value exceeding a ^second reference value (for example, 20 m / s ² ) has been detected (step). S306). When the signal is received (step S306: YES), the counter C having a storage area in a predetermined area in the RAM 23 is added (step S307). Next, the control device 15 determines whether or not the value of the counter C is 2 or more (step S308). This process is repeated for the monitoring timer time, that is, for 50 seconds (step S309).

  In this embodiment, the second reference value is set as a lower vibration value than the first reference value. This is because it is considered that the particle size is gradually reduced by the foreign matter repeatedly colliding with the crushing rotor 7 in the crushing chamber 6, and the generated vibration is also reduced accordingly.

  If the monitoring timer time elapses before the value of the counter C becomes 2 or more, the carry-in conveyor 1 and the feeding rollers 3a and 3b start normal operation (step S310). On the other hand, when the value of the counter C is 2 or more, that is, the number of times of vibration detection exceeding the second reference value is 2 or more (step S308: YES), the control device 15 sends an operation signal to the foreign matter outlet solenoid 9S. Send. When the foreign matter discharge port solenoid 9S that has received the signal is turned on, the foreign matter discharge port 9 is opened (step S311). As the crushing rotor 7 rotates, only the foreign matter remaining in the crushing chamber 6 is discharged to the outside of the crushing chamber 6 through the foreign matter discharge port 9. When it is confirmed that the foreign matter has been discharged (step S312: YES), the foreign matter discharge port solenoid 9S is turned OFF and the foreign matter discharge port 9 is closed (step S313), and the carry-in conveyor 1 and the feeding rollers 3a and 3b are normal. The operation is started and a series of crushing processes can be automatically restarted after the foreign matter is discharged.

  In this embodiment, the foreign substance discharge port 9 is configured to be opened immediately when vibration exceeding the second reference value is detected a plurality of times within the monitoring timer timing time. After the elapse of time, the number of vibrations exceeding the second reference value may be examined, and the foreign matter discharge port 9 may be opened if this number is two or more.

  Next, a second example for performing vibration detection and foreign matter removal processing in steps different from the above-described embodiment will be described with reference to FIGS. 5, 6, and 7. In addition, about the structure which is common in the above-mentioned Example, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As described above, the waste material is crushed by causing the crushing rotor 7 rotating in the crushing chamber 6 to collide with the waste material. The vibration generated at the time of collision is always detected by a vibration sensor 8 installed on the outer wall of the shredder body 5 through the wall of the crushing chamber 6 and the rotation shaft (not shown) of the crushing rotor 7. When the control device 15 receives a signal indicating that the vibration sensor 8 has detected a vibration having an acceleration of the first reference value X ₁ , for example, 25 m / s ² or more (step S501: YES), the control device 15 A signal to stop the rotation is issued to the carry-in conveyor 1 and the feeding rollers 3a and 3b via the O port 24 (FIG. 2) (step S502).

Further, the control unit 15, starts the counting of the waiting time t _1, to reset the vibration detecting counter F that counts a second count of the reference value or more vibrations (step S503). Here, the “standby time” refers to normal waste that is mixed in the crushing chamber 6 and is transferred to the downstream process after crushing the waste material to be transferred to the subsequent downstream process. This is the time for leaving only the foreign matter to be removed in the crushing chamber 6. Here, the standby time is set to 5 seconds.

For 5 seconds as the standby time, the control device 15 monitors whether the vibration sensor 8 records a second reference value, for example, a vibration value of 20 m / s ² or more (step S504). If vibration greater than or equal to the second reference value is detected, a flag is established to record that fact and the number of vibrations is counted (step S505). The flag is stored in a predetermined area of the RAM 23.

  In the present embodiment, as in the above-described embodiment, the second reference value is set as a lower vibration value than the first reference value. This is because it is considered that the particle size is gradually reduced by the foreign matter repeatedly colliding with the crushing rotor in the crushing chamber 6, and the generated vibration is also reduced accordingly.

  When 5 seconds as the standby time have elapsed (step S506: YES), the control device 15 confirms whether or not a vibration greater than or equal to the second reference value is detected within the time (step S507). If no vibration exceeding the second reference value is detected within the time (step S507: NO), it is additionally confirmed whether or not vibration exceeding the second reference value is detected for a predetermined period (step S507). S508, S509, S510), if detected, the process proceeds to step S511 described later. If not detected, the process proceeds to step S519 described later, and the rotation of the carry-in conveyor 1 and the feeding rollers 3a and 3b is resumed. In addition, without passing through these steps S508, S509, and S510, when abnormal vibration is not detected during the standby time, it may be configured to return to normal operation as it is.

  When vibration exceeding the second reference value is detected within the standby time (step S507: YES), or when vibration exceeding the second reference value is detected within a further predetermined period (step S509: YES) In order to monitor whether or not abnormal vibration further occurs, the control device 15 starts counting the vibration monitoring time and resets the counter C that counts the number of times of vibration detection within the time ( Step S511). This is to detect the occurrence of abnormal vibration continuously within a predetermined period so that the foreign matter discharge port 9 is not accidentally opened when sudden vibration detection that does not result from foreign matter mixing occurs. Here, 50 seconds is set as the vibration monitoring time, and 2 times is set as the number of vibration detections when there is a foreign object.

  The control device 15 monitors whether or not a signal indicating that abnormal vibration has occurred from the vibration sensor 8, that is, a signal indicating that a vibration value exceeding the second reference value has been detected is received (step S512). When the signal is received (step S512: YES), a counter C having a storage area in a predetermined area in the RAM 23 is added (step S513). Next, the control device 15 determines whether or not the value of the counter C is 2 or more (step S514). This process is repeated for vibration monitoring time, that is, 50 seconds (step S515).

  When the value of the counter C is 2 or more, that is, when the number of vibration detections exceeding the second reference value is 2 or more (step S514: YES), the control device 15 transmits an operation signal to the foreign matter outlet solenoid 9S. . When the foreign matter discharge port solenoid 9S that has received the signal is turned on, the foreign matter discharge port 9 is opened (step S516). Thereafter, when the crushing rotor 7 rotates, only the foreign matters remaining in the crushing chamber 6 are pushed out, discharged and removed. When the removal and removal of foreign matter is confirmed (step S517: YES), the foreign matter discharge port solenoid 9S is turned off and the foreign matter discharge port 9 is closed (step S518), and the carry-in conveyor 1 and the feeding rollers 3a and 3b are rotated forward. Resumed.

  In this embodiment, the foreign matter discharge port 9 is configured to be opened immediately when vibration exceeding the second reference value is detected a plurality of times within the monitoring timer timing time. After the elapse of time, the number of vibrations equal to or greater than the second reference value may be checked, and the foreign matter discharge port 9 may be opened when this number is two or more.

  In addition to the above-described two embodiments, vibration detection and foreign matter removal processing steps in the following manner may be employed. The third embodiment will be described with reference to FIGS. Here, the same reference numerals are used for the same components, and description thereof is omitted.

As described above, the waste material is crushed by causing the crushing rotor 7 rotating in the crushing chamber 6 to collide with the waste material. The vibration generated at the time of collision is always detected by a vibration sensor 8 installed on the outer wall of the shredder body 5 through the wall of the crushing chamber 6 and the rotation shaft (not shown) of the crushing rotor 7. When the control device 15 receives a signal indicating that the vibration sensor 8 has detected a vibration having an acceleration exceeding a first reference value, for example, 25 m / s ² (step S801: YES), the control device 15 uses the I / O port. A signal to stop the rotation is issued to the carry-in conveyor 1 and the feeding rollers 3a and 3b via 24 (FIG. 2) (step S802).

  Further, the control device 15 starts counting the standby time and the monitoring time t, and resets the abnormal vibration detection number counter C within the monitoring time (step S803). Here, the waiting time / monitoring time t is unnecessary based on the time for detecting the vibration first and then transferring the normal waste material to the downstream process, and the detection of the sudden vibration that is not caused by the contamination. The time for monitoring further abnormal vibration is also measured so as not to open the foreign matter discharge port 9. Here, 5 seconds is set as the standby time and 50 seconds is set as the monitoring time.

  The control device 15 monitors whether or not the standby time / monitoring time t has elapsed 50 seconds (step S804). Here, when it is determined that the waiting time / monitoring time t has passed 50 seconds (step S804: Yes), it is assumed that the foreign matter in the crushing chamber 6 has been eliminated, and the carry-in conveyor 1 and the feeding rollers 3a and 3b. Automatically resumes normal rotation.

  When it is determined that the standby time / monitoring time t has not exceeded 50 seconds (step S804: No), the control device 15 sends a signal indicating that abnormal vibration has occurred from the vibration sensor 8, that is, the second reference value. It is monitored whether a signal indicating that a vibration value exceeding 1 is detected is received (step S806). When the signal is received (step S806: Yes), the counter C having a storage area in a predetermined area in the RAM 23 is added (step S807). Next, the control device 15 determines whether or not the value of the counter C is 2 or more (step S808). When the value of the counter C is less than 2 (step S807: No), the processing from step S804 is repeated again.

  On the other hand, when it is determined that the value of the counter C is 2 or more (step S808: Yes), the control device 15 determines whether or not the standby time / monitoring time t has passed 5 seconds (step S808). S809). This is because if the foreign matter discharge port 9 is immediately opened when a plurality of vibrations are detected within a short period of time after the start of timing, the foreign matter and the normal waste material are discharged without being distinguished from each other. This is the time for transferring the normal waste material to the regular downstream process in order to avoid this.

  This step is repeated until the standby time / monitoring time t has passed 5 seconds. When 5 seconds elapse (step S809: Yes), the foreign matter discharge port solenoid 9S is activated to open the foreign matter discharge port 9, and the foreign matter is discharged from the crushing chamber 6 (step S810). When the discharge of foreign matter is confirmed (step S811: YES), the foreign matter discharge port solenoid 9S is turned OFF and the foreign matter discharge port 9 is closed (step S812), and the upstream process that has been stopped, that is, the carry-in conveyor 1 and the feeding roller 3a. The forward rotation of 3b is automatically restarted.

  In the scrap crushing apparatus described above, even if abnormal vibration occurs in the crushing chamber 6 due to foreign matter mixing, the processing process is not delayed more than necessary by sending normal treated waste materials other than foreign matters downstream. Moreover, when removing foreign matters, normal waste materials are not mixed and foreign matters can be efficiently removed. Further, in addition to the above, by providing a discharge port for removing foreign matter at the top of the crushing chamber 6, foreign matter can be discharged by the rotation of the crushing rotor 7, and foreign matter can be removed more efficiently. Become.

  In addition, since the magnitude of the vibration that becomes the reference for stopping the carry-in conveyor 1 and the feeding rollers 3a and 3b is different from the magnitude of the vibration that becomes the reference for opening the foreign matter discharge port 9, the collision between the foreign matter and the crushing rotor 7 occurs. As a result, even when the particle size of the foreign matter becomes small, it is possible to properly detect the contamination of the foreign matter. On the other hand, since the vibration detection is performed a plurality of times over a plurality of stages, opening of the foreign matter discharge port 9 due to malfunction can be prevented. Furthermore, normal operation can be automatically resumed after the foreign matter is discharged, which contributes to the efficiency of the crushed material treatment.

  Note that the standby time, the vibration reference value, and the vibration detection time in the present embodiment are merely examples, and can be arbitrarily set according to the hardness, weight, capacity of the crushing device itself, and processing capacity of the target waste material. Although the first reference value and the second reference value are illustrated as different reference values as vibration reference values, these two reference values may be the same.

  In addition, although the present invention has been described in the above-described preferred embodiments, the present invention is not limited thereto. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

It is a side view of the scrap crushing apparatus concerning this invention. It is a block diagram showing the electric constitution of a scrap crushing apparatus. It is a flow from the abnormal vibration detection by foreign material mixing to a foreign material discharge port opening in the first embodiment. It is a continuation flow from FIG. It is a flow from the abnormal vibration detection by foreign matter mixing in the 2nd Example to foreign matter discharge opening opening. FIG. 6 is a continuation flow from FIG. FIG. 7 is a continuation flow from FIG. It is a flow from the abnormal vibration detection by foreign matter mixing in the 3rd Example to foreign matter discharge port opening. It is a continuation flow from FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carry-in conveyor 2 Input chute 3a, 3b Feeding roller 4 Hydraulic cylinder 5 Shredder body 6 Crushing chamber 7 Crushing rotor 7H Hammer 7m Rotor drive motor 8 Vibration sensor 9 Foreign matter discharge port 9S Foreign matter discharge port solenoid 10 Discharge port 15 Control device 21 CPU
22 ROM
23 RAM
24 I / O ports

Claims (6)

In a scrap crushing device that performs waste material crushing processing in conjunction with the carry-in conveyor, feeding roller, crushing chamber,
A vibration sensor for detecting vibration in the crushing chamber;
A foreign matter outlet configured to be openable and closable in the crushing chamber;
Have
When the vibration sensor detects vibration exceeding a first reference value, the carry-in conveyor and the feeding roller are stopped,
When the vibration exceeding the second reference value is detected a predetermined number of times within the subsequent monitoring time after a predetermined waiting time, the foreign matter discharge port is opened,
A scrap crusher characterized in that when the foreign matter is discharged, the foreign matter discharge port is closed and the stopped carry-in conveyor and feeding roller are rotated forward. In a scrap crushing device that performs waste material crushing processing in conjunction with the carry-in conveyor, feeding roller, crushing chamber,
A vibration sensor for detecting vibration in the crushing chamber;
A foreign matter outlet configured to be openable and closable in the crushing chamber;
Have
When the vibration sensor detects vibration exceeding the first reference value, the carry-in conveyor and the feeding roller stop,
On the condition that the vibration sensor has detected a vibration exceeding the second reference value during a predetermined standby time, after the predetermined standby time has elapsed, start measuring the monitoring time,
When the vibration exceeding the second reference value is detected a predetermined number of times within the monitoring time, the foreign matter discharge port is opened,
A scrap crusher characterized in that when the foreign matter is discharged, the foreign matter discharge port is closed and the stopped carry-in conveyor and feeding roller are rotated forward. When the vibration sensor does not detect the vibration exceeding the second reference value during the predetermined waiting time, it further starts measuring the confirmation time,
The scrap crushing apparatus according to claim 2, wherein the monitoring time is started even when the vibration sensor detects vibration exceeding a second reference value during the confirmation time. In a scrap crushing device that performs waste material crushing processing in conjunction with the carry-in conveyor, feeding roller, crushing chamber,
A vibration sensor for detecting vibration in the crushing chamber;
A foreign matter outlet configured to be openable and closable in the crushing chamber;
Have
When the vibration sensor detects vibration exceeding the first reference value, the carry-in conveyor and the feeding roller stop,
Open the foreign matter discharge port on the condition that the vibration exceeding the second reference value is detected a predetermined number of times within the monitoring time and that a predetermined waiting time has elapsed,
A scrap crusher characterized in that when the foreign matter is discharged, the foreign matter discharge port is closed and the stopped carry-in conveyor and feeding roller are rotated forward. The predetermined waiting time is a waiting time for transferring the crushed material other than the foreign matter in the crushing chamber to the downstream from the crushing chamber after the supply of the waste material to the crushing chamber is stopped by stopping the carry-in conveyor and the feeding roller. The scrap crushing apparatus according to any one of claims 1 to 4, wherein the scrap crushing apparatus is characterized in that: The scrap crusher according to any one of claims 1 to 5, wherein the second reference value is smaller than the first reference value.

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