JP4093517B2 - Tooth gap adjustment device for crushing device and adjustment method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tooth gap adjusting device for a crushing device using a jaw crusher that crushes rocks, ores, and the like, and an adjusting method thereof.
[0002]
[Prior art]
The gap between the fixed teeth and the moving teeth of the jaw crusher greatly affects the grain size of the crushed rock, that is, the product quality. Therefore, management of the tooth gap is very important. Conventionally, an apparatus that controls the tooth gap and issues an alarm when overloaded is described in Japanese Patent Registration No. 2570057.
[0003]
[Problems to be solved by the invention]
However, the configuration described in Japanese Patent Registration No. 2570057 has the following problems.
1) When calculating the retraction amount of the moving tooth due to wear, since the calculation is based on the machine origin, the calculation method is complicated, and a calculation load is applied to the calculation processing device of the control device. In addition, when exchanging the moving teeth when worn, parts such as a hydraulic cylinder arranged in the vicinity of the moving teeth may be removed in order to secure a working space. Therefore, it is necessary to accurately align the machine origin when adjusting the tooth gap after replacing the parts. Therefore, the method for adjusting the tip clearance is complicated, and the adjustment work takes time.
2) Calculate the amount of movement of the moving tooth necessary to maintain the tooth tip clearance at a predetermined constant value, calculate the amount of hydraulic pump operation corresponding to this amount of movement, and use this amount of hydraulic pump operation to drive the driving tooth drive hydraulic pressure Since the moving tooth is moved by extending the cylinder, there is a large movement error due to the oil leakage of these hydraulic devices, performance error of each device, etc., and the adjustment accuracy of the tip clearance may not be good.
3) The tooth tip gap needs to be changed according to the type of the object to be crushed and the application of the crushed object. In particular, when the type of material to be crushed and the application of the crushed material differ depending on the work site, such as a mobile crusher, it is necessary to change the tooth tip gap each time. Is always adjusted to be constant, and therefore, the application is limited and the application range of the crushing apparatus, that is, the versatility is small.
4) The method of issuing an alarm and responding to the worker at the time of overload only expects the operator's appropriate measures, so it cannot cover human treatment mistakes, and in the worst case, damages the device. Sometimes.
[0004]
The present invention pays attention to the above-mentioned problem, and makes it easy to adjust the tooth tip gap with a simple calculation method in the adjustment of the tooth tip gap of the crushing device having a jaw crusher. It is aimed. Another object is to easily change the setting of the tooth tip gap according to the type of object to be crushed, the use of the crushed object, and the like. Another object is to prevent damage to the apparatus due to overload.
[0005]
[Means, actions and effects for solving the problems]
In order to achieve the above object, in the present invention, as will be described below, the geometrical relationship among the fixed tooth, the jaw to which the moving tooth is attached, the toggle plate, and the position of the operation fulcrum is obtained. Based on the tooth tip gap characteristic, the tooth tip gap corresponding to the position of the operation fulcrum is calculated. This makes the calculation much easier compared to the conventional method of obtaining the tooth tip clearance by calculating the distance to the moving tooth lower end position with respect to the machine origin provided on the toggle block of the operation fulcrum or on the drive means side. In addition, the tooth tip adjustment work such as after the moving tooth replacement work is simplified, and the adjustment time is shortened.
[0006]
  That is, the first invention according to the present invention has a V-shaped cross section by a fixed tooth (4) provided on the frame (3) and a moving tooth (5) which is swingable facing the fixed tooth (4). The crushing chamber (6) is formed and the upper end of the jaw (16) to which the moving tooth (5) is attached is pivotally supported by the eccentric shaft (7) so that it can be eccentrically moved, and the lower part thereof is driven by the drive means (20). There is a jaw crusher (2) that is freely constrained by an arc motion of the other end of the toggle plate (10) attached at one end to the toggle block (13) made movable by The lower part (4a) of the fixed tooth (4) and the moving tooth (5) are moved by moving the lower part of the jaw (16) through the toggle block (13) and the toggle plate (10) by the driving means (20). In the tooth gap adjustment device of the crushing device that adjusts the tooth gap between the lower end portion (5a) and the lower end portion (4a) of the fixed tooth (4) and the lower end portion (5a) of the moving tooth (5) Contact detection means for detecting contact ( 28), position detecting means (22) for detecting the position of the operating fulcrum (12) on one end side that forms the base of the circular motion of the toggle plate (10), contact detecting means (28) and position detecting means (22) The detection signal is input from the position of the operation fulcrum (12) when the contact is detected.,Fixed teeth (4), moving teeth (5) and toggle plates (10)ofBased on the geometrical relationship with the position of the movement fulcrum (12)Operating fulcrum (12) Tooth tip gap characteristics representing the relationship between the position of the tooth and the tooth tip gap valueWhen adjusting the tip clearanceThe drive means is controlled so that the tooth gap value calculated based on the tooth gap characteristic is equal to the target tooth gap value.And a control device (30).
[0007]
  According to the first invention, the contact detecting means detects that the lower end portion of the fixed tooth of the jaw crusher and the lower end portion of the moving tooth are in contact, and the position of the operation fulcrum at that time is detected by the position detecting means. Based on positionRepresents the relationship between the position of the operating fulcrum and the tip clearance valueTooth gapCharacteristicCan be calculated. This eliminates the need for complicated calculations as in the prior art, in which wear is calculated based on the distance between the machine origin and the contact position between the fixed tooth and the moving tooth and the tooth tip gap is adjusted. Therefore, the tooth tip gap value can be calculated by a simple calculation, and thereby the moving tooth can be moved to a position where a predetermined tooth tip gap is obtained. That is, since the reference position is only the operation fulcrum position of the moving tooth when the fixed tooth and the moving tooth are in contact with each other, the tooth tip clearance can be calculated easily and accurately. Therefore, it is possible to easily change the tooth tip gap, and it is possible to reduce the calculation load of an arithmetic processing device such as a CPU, thereby reducing costs and downsizing the device.
[0008]
A second aspect of the invention is based on the configuration of the first aspect of the invention, and includes a tooth tip gap display device that displays the tooth tip gap value calculated by the control device.
[0009]
According to the second invention, since the tooth tip gap calculated by the control device is displayed by the tooth tip gap display device, the operator can easily confirm the current tooth tip gap, and therefore the adjustment work of the tooth tip gap is very much. It becomes easy.
[0010]
  In the third invention, a crushing chamber (6) having a V-shaped cross section is formed by a fixed tooth (4) provided on the frame (3) and a moving tooth (5) which is swingable facing the fixed tooth (4). Forming and moving the lower end (5a) of the moving tooth (5) to create a tooth tip gap between the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5). In the method of adjusting the tip gap of the crushing device to be adjusted, the lower end (5a) of the moving tooth (5) is moved to move the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5). And the position of the lower end (5a) of the moving tooth (5) at the time of contact, and the fixed tooth (4), the moving tooth (5) and the moving tooth (5 ) Corresponding to the position of the lower end (5a) of the moving tooth (5) based on the geometric relationship with the position of the lower end (5a) ofCharacteristicCalculateMemoryAnd a process ofMemorydidBased on tooth gap characteristicsThe process of displaying the tooth tip gap value on the tooth tip gap display device (32) and the operator watching the tooth tip gap value displayed on the tooth tip gap display device (32) and the lower end of the moving tooth (5) (5a) is moved, and the movement of the lower end (5a) of the moving tooth (5) is stopped when the desired tooth tip gap is reached.
[0011]
  According to the third aspect of the present invention, the lower end portion of the moving tooth is moved, and the lower end portion position of the moving tooth when the lower end portion of the fixed tooth and the lower end portion of the moving tooth contact each other is determined according to the position of the lower end portion of the moving tooth. Tooth gapCharacteristicIs calculated. As a result, as was done in the paragraph describing the operation of the first aspect of the invention, an accurate tooth tip gap can be calculated with a simple calculation. Also calculatedBased on tooth gap characteristicsThe tooth tip gap value is displayed on the tooth tip gap display device, and the operator can adjust the tooth tip gap while viewing the displayed value. Therefore, accurate adjustment of the tooth tip gap can be easily performed. Therefore, a product with good quality can be obtained.
[0012]
According to a fourth aspect of the present invention based on the configuration of the first aspect of the invention, the control device initially sets the position of the operation fulcrum detected by the position detection means when the lower end portion of the fixed tooth and the lower end portion of the moving tooth are first brought into contact with each other. Stored as a reference position, every time contact is detected by the contact detection means, the difference between the position of the operation fulcrum detected by the position detection means and the stored initial reference position is calculated to calculate the amount of wear of the fixed teeth and the moving teeth. The configuration is as desired.
[0013]
According to the fourth aspect of the invention, after the fixed teeth and / or the moving teeth are replaced, the position of the operation fulcrum when the lower end portion of the fixed teeth and the lower end portion of the moving teeth are first contacted is stored as the initial reference position. Then, every time contact is made, the difference between the position of the operation fulcrum at that time and the stored initial reference position is calculated to obtain the wear amount of the fixed tooth and the moving tooth, so that the operator does not measure the actual thing. The amount of wear is automatically and accurately measured so that the life of the tooth tip can be predicted by the amount of wear. Accordingly, the life management of the fixed teeth and the moving teeth can be easily and accurately performed, so that the accuracy of the product quality (that is, the particle size) can be maintained uniformly.
[0014]
5th invention is based on the structure of 4th invention, and the said control apparatus presets the position or wear amount limit value of the operation | movement fulcrum corresponding to the wear limit of a fixed tooth and a moving tooth based on the said initial reference position. Each time the contact is detected by the contact detection means, the position of the operation fulcrum detected by the position detection means is compared with the position corresponding to the stored wear limit, or the calculated wear amount and the The stored wear amount limit value is compared to determine whether or not the wear limit has been reached.
[0015]
According to the fifth invention, the operator automatically determines whether the fixed tooth and the moving tooth have reached the wear limit or not. Accordingly, the life management of the fixed teeth and the moving teeth can be performed accurately and easily, and the fixed teeth or the moving teeth can be replaced at an appropriate time, so that the product accuracy can be improved.
[0016]
According to a sixth aspect of the present invention, based on the configuration of the fifth aspect of the invention, a wear notification device for notifying that the fixed teeth and the moving teeth have reached the wear limit when an alarm command is input is provided. When it is determined that the tooth has reached the wear limit, the warning command is output to the wear notification device.
[0017]
According to the sixth aspect of the invention, it is easy for the operator to know whether the fixed tooth or the moving tooth has reached the wear limit by the notification device (buzzer, display, etc.). Therefore, since treatments such as replacement of fixed teeth and moving teeth can be performed immediately, a product of good quality can be obtained.
[0018]
According to a seventh aspect of the present invention, a crushing chamber having a V-shaped cross section is formed by a fixed tooth provided on the frame and a moving tooth facing the fixed tooth and freely swingable, and the upper end of the jaw to which the moving tooth is attached is formed. The shaft is pivotally supported by an eccentric shaft so that it can be moved eccentrically, and the lower part thereof can be moved freely by an arc motion of the other end with the one end as the base point of the toggle plate attached at one end to a toggle block that can be moved by driving means. The jaw crusher is constrained, and the lower part of the jaw is moved by the driving means via the toggle block and toggle plate to adjust the gap between the lower end of the fixed tooth and the lower end of the moving tooth. In the tip clearance adjustment device of the crushing device, the contact detection means for detecting the contact between the lower end of the fixed tooth and the lower end of the moving tooth, and the position of the operation fulcrum on the one end side that forms the base point of the circular motion of the toggle plate are detected. To do Detection means, tooth tip gap setting means for setting a target tooth gap value, and target tooth tip gap values set by the tooth tip gap setting means are stored in advance, and contact detection means and position detection are performed during tooth tip gap adjustment. The detection signal from the means is input, and the operation fulcrum is determined based on the geometric relationship between the fixed tooth, the moving tooth, the toggle plate, and the position of the operation fulcrum based on the position of the operation fulcrum when the contact is detected. The actual tooth tip clearance corresponding to the position is calculated, the deviation value between the actual tooth tip clearance value and the stored target tooth tip clearance value is constantly calculated, and the drive means is instructed so that the deviation value becomes substantially zero. And a controller that automatically adjusts the actual tooth tip clearance by outputting a signal.
[0019]
According to the seventh invention, the tooth crevice of the jaw crusher is set in advance to a desired target value, and this value is stored in the control device. The control device constantly calculates a deviation value between the actual tooth tip clearance calculated based on the detection signals from the contact detection means and the position detection means and the stored target tooth tip clearance value, and the deviation value is substantially zero. The command signal is output to the drive means so that the jaw, that is, the lower end of the moving tooth is moved, and the actual tooth tip clearance can be adjusted to a desired value. As a result, the tooth tip gap can be set appropriately according to the type and application of the object to be crushed and is automatically adjusted to the set value, so that a product with always good quality can be easily obtained. , Work efficiency is improved.
[0020]
The eighth invention includes a tooth tip gap display device that displays the actual tooth tip gap value calculated by the control device and the set target tooth tip gap value based on the configuration of the seventh invention.
[0021]
According to the eighth aspect, since the actual tooth tip clearance value and the target tooth tip clearance value are displayed by the tooth tip clearance display device, the operator can easily confirm and the adjustment work becomes easier.
[0022]
The ninth invention has operation limit detecting means for detecting that the operation fulcrum has reached a predetermined operation limit range on the tooth tip gap opening side based on the configuration of the first invention, and the control device is provided with position detection. When the detection signal from the operation limit detection means is input and the position of the operation fulcrum detected by the position detection means during the crushing operation exceeds a predetermined deviation allowable range, or the detection signal of the operation limit detection means When the operation fulcrum is determined to have reached the operation limit range based on the above, a command signal for stopping the operation of the jaw crusher by the eccentric shaft and the operation of the supply device for supplying the object to be crushed is output. Yes.
[0023]
According to the ninth aspect, the control device determines whether or not the position of the operation fulcrum exceeds a preset allowable deviation range. Alternatively, it is determined whether or not the position of the operation fulcrum has reached a preset operation limit range. When the operation fulcrum exceeds the allowable range of deviation or reaches the operation limit range, the operations of the jaw crusher and the supply device are stopped. Therefore, it is possible to prevent a large amount of defective products from being produced without the operator's knowledge, and to prevent damage to the apparatus.
[0024]
In a tenth aspect based on the configuration according to the first aspect, the control device sets the operation fulcrum after the adjustment of the tooth tip gap in the vicinity of the reference position when the fixed tooth and the moving tooth are in contact during the adjustment of the tooth tip gap. When entering the movement prohibition region, a command signal for stopping the operation of the jaw crusher by the eccentric shaft and / or the operation of the supply device is output.
[0025]
According to the tenth invention, the control device stops the operation of the jaw crusher and / or the supply device when the operation fulcrum enters the movement prohibition area where the fixed tooth and the moving tooth may approach and interfere with each other. be able to. Therefore, it is possible to prevent interference between the fixed teeth and the moving teeth and prevent damage to the device.
[0026]
The eleventh invention is based on the configuration of the ninth or tenth invention, wherein a plurality of crushing devices are arranged in series, and the crushing material is supplied from the crushing material transport device of the crushing device on the upstream side to perform crushing. When stopping the operation of the jaw crusher and / or the supply device of the side crushing device, at the same time, a command signal for stopping the operation of at least the supply device of the jaw crusher, the supply device and the crushed material conveying device of the upstream crushing device In the downstream crushing device.
[0027]
According to the eleventh aspect of the invention, when the operation of the jaw crusher and / or the supply device of the downstream crushing device is stopped, the output means for outputting a command signal for stopping the operation of at least the supply device of the upstream crushing device at the same time. It is in the crushing device on the downstream side. As a result, even when the crushing device on the downstream side stops crushing, the extra crushing material is not supplied to the downstream jaw crusher. It becomes unnecessary and the burden on the operator is reduced, and the crushing work can be performed efficiently. Therefore, it is possible to apply a plurality of crushing devices in series, and it is possible to produce crushed materials with various particle sizes according to the type of material to be crushed and the purpose of the crushed material. .
[0028]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Embodiments of a tooth tip gap adjusting device and a method for adjusting a crushing device according to the present invention will be described below in detail with reference to the drawings.
[0029]
FIG. 1 is a front sectional view of the crushing apparatus 1 of the first embodiment, and FIG. 2 is a view taken along the line AA of FIG. In FIG. 1, the jaw crusher 2 has a frame 3, fixed teeth 4, moving teeth 5, and an eccentric shaft 7. A moving tooth 5 is slidably provided facing a fixed tooth 4 erected substantially vertically in the frame 3, and a crushing chamber 6 having a V-shaped cross section is formed by the fixed tooth 4 and the moving tooth 5. The upper end portion of the jaw 16 to which the moving teeth 5 are attached is pivotally supported by the eccentric shaft 7 so as to be able to move eccentrically, and the lower end portion thereof is constrained to be swingable substantially vertically by the arc movement of the toggle plate 10. Above the jaw crusher 2, a supply device 9 for putting a material to be crushed into the crushing chamber 6 is disposed, and the crushing device 1 is configured together with the jaw crusher 2. Further, the front end portion 11 of the toggle plate 10 is pivotally in contact with the back side of the lower end portion of the moving tooth 5, and the rear end portion is pivotally in contact with the tip portion of the toggle block 13. A rear end portion of the toggle plate 10 is a base point of the circular arc motion of the toggle plate 10, and serves as an operation fulcrum 12 of the lower end portion 5 a of the moving tooth 5. The toggle block 13 is slidably mounted on the lower frame 8 fixed to the frame 3 so as to be slidable toward the moving tooth 5, and as shown in FIGS. Are connected to each other via a pair of hydraulic cylinders 21 and 21. Further, as shown in FIG. 2, a pair of tension rods 14, 14 for holding the toggle plate 10 between the moving tooth 5 and the toggle block 13 are provided on the left and right sides of the pair of hydraulic cylinders 21, 21. Is provided. The pair of tension rods 14 and 14 are biased by the springs 15 and 15 in the direction of compressing the toggle plate 10 between the moving tooth 5 and the toggle block 13. In FIGS. 1 and 2, when the hydraulic cylinders 21 and 21 are expanded and contracted, the moving tooth 5 swings about the eccentric shaft 7, and the lower end portion 5 a of the moving tooth 5 moves in a substantially horizontal direction. As a result, the tooth gap W formed between the lower end 4a of the fixed tooth 4 and the lower end 5a of the moving tooth 5 changes. That is, the particle size (particle size) of the crushed material can be changed.
[0030]
The hydraulic cylinder 21 is provided with position detecting means 22 for detecting the expansion / contraction position of the hydraulic cylinder 21. The position detection means 22 is a potentiometer, for example, and can detect the expansion and contraction of the hydraulic cylinder 21, that is, the position of the operation fulcrum 12.
Although the operation fulcrum 12 shown in FIG. 1 is a mechanical operation fulcrum, the operation fulcrum serving as a reference for calculating the tooth tip gap W according to the present invention is not limited to the position of the operation fulcrum 12. The predetermined position where the relationship between the movement amount of the hydraulic cylinder 21 and the tooth tip gap W is obtained.
[0031]
FIG. 3 is a hydraulic circuit diagram of the drive means 20 that drives the hydraulic cylinder 21 that moves the lower end portion 5a of the moving tooth 5 in a substantially horizontal direction. In the figure, a hydraulic pump 24 and a pair of hydraulic cylinders 21, 21 are connected via an electromagnetic switching valve 25. The electromagnetic switching valve 25 is a three-position switching valve. The A position corresponds to the extension position of the hydraulic cylinder 21, the C position corresponds to the contraction position, and the B position corresponds to the neutral position. The operation solenoid portion of the electromagnetic switching valve 25 is connected to the control device 30, and the electromagnetic switching valve 25 is switched by a command signal from the control device 30. A one-way valve 27 is provided on the bottom circuit 26 that connects the output port of the electromagnetic switching valve 25 and the bottom chamber of the hydraulic cylinder 21, and the one-way valve 27 is applied even when an external force on the reduction side is applied to the hydraulic cylinder 21. Thus, the bottom circuit 26 is closed and the hydraulic cylinder 21 is not reduced. A contact detection means 28 is provided upstream of the one-way valve 27 of the bottom circuit 26, and a contact detection signal from the contact detection means 28 is connected to the control device 30. The contact detection means 28 is composed of, for example, a pressure switch, and outputs a contact detection signal to the control device 30 when the hydraulic pressure of the bottom circuit 26 rises to a predetermined pressure and the pressure switch is turned on. The detection signal of the position detection means 22 attached to the hydraulic cylinder 21 is input to the control device 30.
[0032]
When the electromagnetic switching valve 25 is switched to the A position by a command signal from the control device 30, the hydraulic cylinder 21 expands, when it is set to the C position, the hydraulic cylinder 21 contracts, and when it is set to the B position, the hydraulic cylinder 21 stops moving. When the hydraulic cylinder 21 is extended, the tooth gap W gradually decreases, and when the lower end 4a of the fixed tooth 4 and the lower end 5a of the moving tooth 5 come into contact with each other, the hydraulic pressure in the bottom chamber of the hydraulic cylinder 21 increases. The contact detection means 28 detects the contact between the fixed tooth 4 and the moving tooth 5 by this increase in hydraulic pressure.
The contact detection means 28 may use, for example, a strain gauge, or the contact detection means 28 determines that the detection value of the position detection means 22 does not change when the moving tooth 5 is moved in the direction of the fixed tooth 4. You may make it do.
[0033]
Next, a method for calculating the tooth tip gap W will be described. The tooth tip gap W is calculated and adjusted based on the position of the operation fulcrum 12 when the lower end portion 4a of the fixed tooth 4 and the lower end portion 5a of the moving tooth 5 are in contact, that is, when the tooth tip gap W becomes zero. . Here, the position of the tooth tip 5a of the moving tooth 5 is based on the position of the operation fulcrum 12, the rotation angle of the eccentric shaft 7, the distance between the axis of the eccentric shaft 7 and the front end portion 11 of the toggle plate 10, and the toggle. It can be calculated geometrically with reference to the length of the plate 10 or the like.
[0034]
FIG. 4 is an explanatory view of the tooth tip gap characteristic representing the relationship between the detected value of the position detecting means 22, that is, the position of the operation fulcrum 12, and the tooth tip gap W. In the figure, the horizontal axis represents the detection value of the position detecting means 22, and the vertical axis represents the tooth tip gap W. This tooth tip gap characteristic is obtained from the geometric positional relationship as described above, and is stored in the memory of the control device 30 in correspondence with the position detection value for each predetermined distance. In the figure, a point Ao on the horizontal axis is a detection value of the position detecting means 22 when the lower end portions 4a and 5a are in contact with each other when the fixed tooth 4 and the moving tooth 5 are new. In this case, The tooth tip gap W is calculated based on the tooth tip gap characteristic fo. An is a detection value of the position detection means 22 when the fixed teeth 4 and the moving teeth 5 are in contact after the tooth tips 4a and 5a are worn by a predetermined amount (that is, after operating for a predetermined time). The characteristic is updated from fo to fn, and the tooth tip gap W is calculated based on the updated tooth tip gap characteristic fn. Az is a detection value at the time of wear limit between the fixed tooth 4 and the moving tooth 5, and the tooth tip gap characteristic at this time is fz. Here, a point Ak on the horizontal axis is a mechanical operation limit position. Note that the curve indicated by the solid line in this graph is obtained by geometric calculation as described above, but the curve obtained by the same calculation may be replaced with an approximate straight line as indicated by a thin one-dot chain line. Good. Further, the tooth tip gap characteristic fn may be expressed by a predetermined function based on a geometric relationship with the position detection value as a variable, and the tooth tip gap is calculated by calculating this function value according to the position detection value in actual operation. W may be obtained.
[0035]
The update of the tooth tip clearance characteristic is performed according to the flowchart shown in FIG. In the flowchart, in step 41, the control device 30 inputs a detection signal from the contact detection means 28, and determines whether or not the fixed tooth 4 and the moving tooth 5 are in contact with each other. If contact has been made, the routine proceeds to step 42, where the position detection signal An from the position detection means 22 is input, a new tooth tip gap characteristic fn is calculated based on this position detection signal An, and updated to this characteristic. Thereafter, the tooth tip gap W is calculated based on the new tooth tip gap characteristic fn until the fixed tooth 4 and the moving tooth 5 come into contact with each other. If not in step 41, the process proceeds to step 43, where the tooth tip gap W is calculated based on the tooth tip gap characteristic fn-1 stored at that time.
[0036]
Next, the tooth tip clearance control method will be described.
FIG. 6 is a control configuration block diagram of the crushing apparatus of the first embodiment. The drive means 20 is a drive means for the hydraulic cylinder 21 as shown in FIG. The tooth tip clearance display device 32 has a numerical display such as an LED display or a graphic display, for example, and displays the calculated tooth tip clearance value on this display. The wear notification device 33 notifies a worker or the like when the amount of wear of the fixed teeth 4 and / or the moving teeth 5 reaches a wear limit equal to or greater than a predetermined value. For example, a graphic display or a character display And a display means such as an alarm lamp, a sound generation means such as a buzzer, or a combination thereof. The control device 30 is connected to a moving tooth opening / closing signal input means 31 comprising, for example, a tooth tip adjustment manual start switch, a moving tooth opening command switch, and a moving tooth closing command switch, a contact detection means 28, and a position detection means 22. The command signal and detection signal from these means are input. Further, the control device 30 performs a predetermined calculation process based on these input signals, and outputs a predetermined drive command to the electromagnetic switching valve 25 of the drive means 20 based on the calculation result, to the tooth gap display device 32. A display command is output, and further, a notification command at the time of wear limit is output to the wear notification device 33.
[0037]
When adjusting the tooth tip clearance, the operator first manually inputs a tooth tip adjustment operation start command to the control device 30 by the tooth tip adjustment manual start switch of the moving tooth opening / closing signal input means 31. Thereafter, the control device 30 automatically outputs a command to close the moving tooth 5 to the driving means 20, thereby extending the hydraulic cylinder 21 to move the moving tooth 5 toward the fixed tooth 4, and the contact detecting means 28. When the contact between the fixed tooth 4 and the moving tooth 5 is detected, the movement of the moving tooth 5 is stopped. Then, the position detection signal An of the position detection means 22 at this time is inputted, and a new tooth tip clearance characteristic fn is calculated based on the position detection signal An, and the previous tooth tip clearance characteristic fn-1 (initial characteristic). Fo) is updated to a new tooth gap characteristic fn. Thereafter, the tooth tip gap W is calculated based on the tooth tip gap characteristic fn according to the magnitude of the position detection value of the position detection means 22, and the calculated tooth tip gap value is displayed on the tooth tip gap display device 32. Note that the control device 30 automatically performs the calculation and update processing of the tip gap characteristic fn from the start of moving tooth closing.
[0038]
Next, the operator looks at the current tooth tip gap value displayed on the tooth tip gap display device 32, and uses the moving tooth opening command switch or the moving tooth closing command switch of the moving tooth opening / closing signal input means 31 to move the moving tooth opening signal. Alternatively, the moving tooth closing signal is manually input to the control device 30 and the hydraulic cylinder 21 is driven via the driving means 20 to move the moving tooth 5 in the opening direction or the closing direction. At this time, the moving tooth opening / closing signal input means 31 is moved at a slow speed by the inching operation, and positioning can be performed with high accuracy. When the desired tooth tip clearance is reached, the operator turns off the operation of the moving tooth opening / closing signal input means 31 to stop the movement.
By the above operation, the operator can easily adjust the desired tooth gap W with high accuracy.
[0039]
Next, the tooth tip wear notification method will be described.
The operator uses the detection value Ao of the position detection unit 22 when the contact detection unit 28 detects contact between the fixed tooth 4 and the moving tooth 5 as new as a reference, and has a predetermined limit beyond the detection value Ao. A wear limit value Az that is larger by the wear amount is set in advance and stored in a predetermined memory in the control device 30. After that, the control device 30 issues a warning command to the wear notification device 33 when the detected value of the position detecting means 22 at the time of contact reaches the set wear limit value Az every time the fixed tooth 4 and the moving tooth 5 are brought into contact with each other. By outputting, the operator is informed that the wear limit has been reached. Further, the control device 30 stores the detected value Ao, calculates a difference value between the detected value Ao and the detected value Am at the time of each contact, that is, the wear amount “Am−Ao”, and this wear amount “Am”. When “−Ao” becomes larger than the preset limit wear amount “Az−Ao”, an alarm command may be output to the wear notification device 33 to be notified. Upon receiving this notification, the operator stops driving the crushing device 1 and can perform predetermined measures such as replacing the fixed teeth 4 and / or the moving teeth 5 with new ones or turning them upside down.
[0040]
Next, a second embodiment will be described based on FIG. FIG. 7 is a control configuration block diagram of the crushing apparatus of the present embodiment.
The tooth tip gap setting means 36 is for inputting numerical values of the tooth tip gap data, and can be constituted by, for example, a numeric input switch such as a numeric keypad or a digital switch, and a writing switch. Or you may make it input setting data and a setting command by communication.
Further, the tooth tip gap adjustment start means 37 is a means for starting automatic adjustment of the tooth tip gap, and may be constituted by, for example, an adjustment start switch, or an adjustment start command may be input by communication.
The control device 30 inputs numerical data, command signals, detection signals, and the like from the tooth tip gap setting means 36, the tooth tip gap adjustment starting means 37, the contact detection means 28, and the position detection means 22, and these data and signals are input to these data and signals. Based on this, predetermined processing is performed. And according to this processing result, a predetermined command signal is output to the drive means 20 and the tooth gap display device 32, respectively.
[0041]
When adjusting the tooth tip clearance, the operator first inputs and stores desired tooth tip clearance data to the control device 30 by the tooth tip clearance setting means 36. Next, the operator inputs an adjustment start signal of the tooth tip clearance to the control device 30 by the tooth tip clearance adjustment start means 37. The control device 30 having input the adjustment start signal automatically performs the following operation. First, a command signal is output to the drive means 20 to extend the hydraulic cylinder 21 and move the moving tooth 5 toward the fixed tooth 4. When the contact detecting means 28 detects contact between the fixed tooth 4 and the moving tooth 5, the extension of the hydraulic cylinder 21 is stopped, and at the same time, the tooth tip gap characteristic is updated with reference to the detected value of the position detecting means 22 at that time. . Next, a target position of the operation fulcrum 12 such that the actual tooth tip clearance becomes equal to the input desired tooth tip clearance data is calculated based on the updated tooth tip clearance characteristics, and the actual operation fulcrum 12 is calculated. Is output to the hydraulic cylinder 21 so that the target position is reached, and when the detected value of the position detecting means 22 becomes equal to the target position, the operation of the hydraulic cylinder is stopped.
By the above operation, the adjustment is automatically made to the set tooth gap, so that the adjustment work becomes very easy. Moreover, since it can set to the tooth-tip gap according to the kind and usage of the object to be crushed at the work site, the crushing apparatus can be used universally.
[0042]
Next, a third embodiment will be described.
FIG. 8 is a front sectional view of the crushing apparatus of the present embodiment. In the figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted here.
When an overload is applied to the jaw crusher 2 during the crushing operation and the operating fulcrum 12 is displaced beyond a predetermined allowable deviation range, the tooth gap W becomes large and the product quality is deteriorated (that is, the particle size is reduced). Problem). Further, if the displacement of the operation fulcrum 12 reaches the mechanical operation limit position and an excessive external force is applied, the crushing device may be damaged. Furthermore, if the tooth tip gap W becomes too small, the fixed tooth 4 and the moving tooth 5 may interfere with each other when the moving tooth 5 swings, which may cause damage to the device. In order to prevent these, the crushing device of the present invention has an overload prevention function and an interference prevention function.
[0043]
When the hydraulic cylinder 21 is reduced, the toggle block 13 is configured to abut against the lower frame 8 at a predetermined position. This abutting position is a mechanical operation limit position of the toggle block 13, and an operation limit detecting means 23 for detecting that the toggle block 13 has reached a predetermined position separated from the mechanical operation limit position by a predetermined distance is provided in the lower frame. 8 and the toggle block 13. The operation limit detection means 23 is composed of a position detector such as a limit switch or a proximity switch. The position detection unit 22 may also serve as the operation limit detection unit 23.
[0044]
FIG. 9 is a control configuration block diagram of the crushing apparatus of the present embodiment. The control apparatus 30 is connected to the contact detection means 28, the position detection means 22, and the operation limit detection means 23, and inputs each detection signal. Further, the control device 30 performs predetermined calculation processing based on these detection signals, and an eccentric shaft driving means 34 such as a hydraulic motor that rotationally drives the eccentric shaft 7 of the jaw crusher 2 based on the calculation result, and a supply device. Each drive command signal is output to supply device drive means 35 such as a hydraulic motor that drives 9.
[0045]
Next, the operation according to the above configuration will be described. The operator preliminarily moves the allowable limit L of the movement fulcrum for quality assurance, the movement limit position detected by the movement limit detecting means 23, and the moving tooth 5 for preventing interference between the fixed tooth 4 and the moving tooth 5. Is set and stored in the control device 30. FIG. 10 is an explanatory diagram of each of these setting positions, and the horizontal axis of the figure represents the detection position of the position detection means 22. The reference position Bo is the detection position of the operation fulcrum 12 when the fixed tooth 4 and the moving tooth 5 are in contact with each other during a certain gap adjustment, and the position Bn is when the desired tooth tip gap W is adjusted. This is the detection position of the operation fulcrum 12. A deviation allowable limit position Bs necessary for quality assurance is set at a position of a predetermined distance L (L is an allowable deviation limit value) from the position Bn. The position Ak is a mechanical motion limit position, and the motion limit position Am detected by the motion limit detection means 23 is set at a position a predetermined distance M before the position Ak. A movement prohibition area in which a position Bp separated from the reference position Bo by a predetermined distance N to the open side of the moving tooth 5 is set and there is a possibility of interference between the solid tooth 4 and the moving tooth 5 between the reference position Bo and the position Bp. It is said. The position Az is a position that is regarded as a wear limit when the operation fulcrum 12 when the fixed tooth 4 and the moving tooth 5 are brought into contact with each other comes to this position Az.
[0046]
The control device 30 moves the operation fulcrum 12 of the moving tooth 5 to adjust the tooth tip gap last time, and stores the detection position Bn of the position detection means 22 when the position of the operation fulcrum 12 is determined. Thereafter, the control device 30 calculates the distance between both positions, that is, the absolute value of “Bn−B” based on the detection position Bn and the detection position B of the position detection means 22 during the crushing operation. When the distance between them becomes equal to or greater than the allowable deviation limit value L, an operation stop signal is output to the eccentric shaft drive means 34 and the supply device drive means 35 to stop the operation, thereby preventing the occurrence of defective products. Even when the distance between the two positions is smaller than the allowable deviation limit value L, if the detection position B during the crushing operation exceeds the movement limit position Am and approaches the mechanical movement limit position Ak, that is, the movement limit detection. When the means 23 detects, the control device 30 stops the operation of the eccentric shaft drive means 34 and the supply device drive means 35, thereby preventing damage to the machine.
Furthermore, the control device 30 stores, as the reference position Bo, the detection position of the position detection means 22 when the fixed tooth 4 and the moving tooth 5 are in contact with each other during the last gap adjustment, and during crushing after the tooth tip gap adjustment. The distance between the detection position B of the position detection means 22 and the reference position Bo, that is, the absolute value of “Bo−B” is calculated. When the distance between the two positions is equal to or less than the predetermined distance N, it is determined that the detection position B has reached the movement prohibition region in the vicinity of the fixed tooth 4, and the operation of the eccentric shaft driving unit 34 and the supply device driving unit 35 is performed. By stopping, the interference between the fixed teeth 4 and the moving teeth 5 can be prevented, whereby the breakage of the crushing device can be prevented beforehand.
[0047]
In the case of a so-called self-propelled crusher equipped with a crushing device configured as described above on a movable vehicle, a work in which a plurality of self-propelled crushers are arranged in series to crush the crushed material in order. May be performed. FIG. 11 shows an application example in which two self-propelled crushers 50a and 50b are arranged in series. The lower traveling bodies 51a and 51b of the two self-propelled crushers 50a and 50b are equipped with crushing apparatuses 1a and 1b each including jaw crushers 2a and 2b and supply apparatuses 9a and 9b, respectively. Below the jaw crushers 2a and 2b, crushed material transport devices 52a and 52b for carrying the crushed material to the outside are provided, respectively. The downstream self-propelled crusher 50b receives the crushed material supplied from the crushed material transport device 52a of the upstream self-propelled crusher 50a to the supply device 9b and further finely crushes (secondary crushing) by the jaw crusher 2b. Do. In the case of such series application, even if the problems as described above occur in the downstream crushing device and the operation of the supply device 9b and the jaw crusher 2b is stopped, the crushed material is still in the upstream self-propelled crushing. The crushed material conveying device 52a of the machine 50a continues to be supplied. Therefore, the supply device 9b and jaw crusher 2b of the self-propelled crusher 50b on the downstream side are filled with crushed material, and when restarting, the crushed crushed material must be removed manually. Need time.
[0048]
In order to solve the above problem, the control device of the tip gap adjusting device of the crushing device according to the present invention simultaneously stops the operation of the supply device 9b and / or the jaw crusher 2b of the downstream self-propelled crusher 50b. The self-propelled crushing apparatus 50a on the upstream side has an interlock function for stopping the operation of at least the supply apparatus 9a.
FIG. 12 is a configuration block diagram of an interlock function between the upstream side crusher and the downstream side crusher. The control device 30b of the downstream side self-propelled crusher 50b has a first external output unit 53 formed of a wireless transmitter, and the control device 30a of the upstream side self-propelled crusher 50a has a wireless receiver 55. Have. When stopping the supply device 9b and / or the jaw crusher 2b of the downstream self-propelled crusher 50b, the first external output unit 53 wirelessly outputs a stop command signal to the upstream self-propelled crusher 50a. The upstream radio receiver 55 receives this and inputs it to the control device 30a, and the control device 30a stops at least the operation of the supply device 9a. This interlock signal prevents a large amount of crushed material from being supplied to the self-propelled crusher 50b even when the downstream self-propelled crusher 50b is stopped. There is no need to remove this, and restarting can be performed easily. In addition, since it is a wireless interlock, the movement, arrangement, etc. of both self-propelled crushers can be performed freely without being affected.
Further, the control device 30b of the downstream self-propelled crusher 50b may include a second external output unit 54. The second external output unit 54 is configured by an output circuit using a relay or an electronic circuit (circuit such as a transistor or a logic IC), and is connected to the control device 30a of the upstream self-propelled crusher 50a by wire. The operation and effect in this case are almost the same as the above-described wireless interlock, but it can be manufactured at a lower cost than using a wireless device.
[0049]
As described above, according to the present invention, the following effects can be obtained.
(1) Since the tooth tip clearance is obtained based on the position where the fixed tooth and the moving tooth contact, the calculation based on the distance from the machine origin position is not required, and the accurate tooth tip clearance of the jaw crusher can be obtained with a simple calculation. Can be calculated. Therefore, the calculation load of the arithmetic processing device such as the CPU of the control device can be reduced, so that the cost and the weight can be reduced.
(2) Further, since calculation based on the distance from the machine origin position is no longer necessary, it is not necessary to set the machine origin position accurately at the time of repair or maintenance inspection. As a result, the machine origin setting operation can be performed easily and in a short time, and the labor of the operator can be greatly reduced.
(3) Furthermore, because the tooth tip clearance can be easily set according to the type and application of the object to be crushed, a high quality product, that is, a crushed material having a desired particle size can be obtained without variation. Thereby, the application range is wide and a highly versatile crushing apparatus is obtained.
(4) Further, since the tooth tip gap can be measured with high accuracy, the degree of wear of the fixed teeth and the moving teeth can also be measured accurately, so that the tooth tip replacement at the time of wear can be effectively performed at an appropriate time. Therefore, the tooth tip replacement part can be used without waste and without deteriorating the accuracy of the product, and the number of maintenance operations can be reduced.
(5) After adjusting the tip clearance, the operating fulcrum position of the moving tooth is constantly monitored. When an overload is applied during crushing and the moving tooth exceeds the allowable deviation limit range, the operating limit near the machine origin is reached. When moving beyond the position, or when entering the movement prohibition area near the fixed tooth, the operation of the moving tooth and the supply device are stopped, so it is possible to reliably damage the crushing device that is likely to occur due to mistakes in human judgment. Can be prevented in advance.
(6) When using a plurality of crushing devices arranged in series according to the type of material to be crushed and the use of the crushed material, at least of the upstream crushing device at the time of crushing stop of the downstream crushing device Since the feeding device is stopped or the jaw crusher is stopped in addition to this, a large amount of crushed material is not accumulated in the crushing device on the downstream side, and the operation can be easily restarted. Further, since at least the supply device of the upstream crushing device is stopped, the upstream crushing device is configured such that a large amount of material to be crushed is stored in the jaw crusher of the upstream crushing device when the downstream crushing device is stopped. Can be prevented from occurring.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a crushing apparatus according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a hydraulic circuit diagram of drive means of the present invention.
FIG. 4 is an explanatory diagram of a tooth tip gap characteristic representing a relationship between a detection value of a position detection unit and a tooth tip gap.
FIG. 5 is an example of a flowchart for updating tooth tip clearance characteristics;
FIG. 6 is a control configuration block diagram of the first embodiment.
FIG. 7 is a control configuration block diagram of a second embodiment.
FIG. 8 is a front sectional view of a crushing device according to a third embodiment.
FIG. 9 is a control configuration block diagram of a third embodiment.
FIG. 10 is an explanatory diagram of each setting position related to an overload prevention function.
FIG. 11 is an explanatory diagram of an application example to work in a serial arrangement of self-propelled crushers.
FIG. 12 is a configuration block diagram of an interlock function between an upstream side crusher and a downstream side crusher.
[Explanation of symbols]
1: crushing device, 2: jaw crusher, 3: frame, 4: fixed tooth, 4a, 5a: tooth tip, 5: moving tooth, 8: lower frame, 9: feeding device, 10: toggle plate, 12: operation fulcrum , 13: Toggle block, 20: Driving means, 21: Hydraulic cylinder, 22: Position detecting means, 23: Operation limit detecting means, 28: Contact detecting means, 30: Control device, 31: Moving tooth opening / closing signal input means, 32 : Tooth tip gap display device, 33: wear warning device, 34: eccentric shaft drive means, 35: supply device drive means, 36: tooth tip gap setting means, 37: tooth tip gap adjustment start means, 50, 50a, 50b: Self-propelled crusher, 52a, 52b: crushed material transport device, 53: first external output unit, 54: second external output unit.

Claims (11)

A fixed tooth (4) provided on the frame (3) and a moving tooth (5) which is swingable facing the fixed tooth (4) form a crushing chamber (6) having a V-shaped cross section, A toggle block (13) in which the upper end of the jaw (16) with the teeth (5) attached is pivotally supported by the eccentric shaft (7) so that it can be moved eccentrically, and the lower part thereof is movable by the drive means (20). The jaw plate has a jaw crusher (2) that is movably constrained by an arc motion of the other end of the toggle plate (10) with one end attached to the base plate, and a toggle block ( 13) and the lower part of the jaw (16) through the toggle plate (10), and the tooth between the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5) In the tooth tip clearance adjusting device of the crushing device that adjusts the tip clearance,
Contact detection means (28) for detecting contact between the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5);
Position detection means (22) for detecting the position of the operation fulcrum (12) on one end side which forms the base point of the circular motion of the toggle plate (10);
The detection signals from the contact detection means (28) and the position detection means (22) are input , and the fixed tooth (4) and the moving tooth (5) based on the position of the operation fulcrum (12) when the contact is detected. ) And the geometrical relationship between the position of the movement fulcrum (12) of the toggle plate (10) and the tooth tip gap characteristic representing the relationship between the position of the movement fulcrum (12) and the tooth tip gap value , And a control device (30) for controlling the driving means so that a tooth tip gap value calculated based on the tooth tip gap characteristic at the time of the tooth tip gap adjustment is equal to a target tooth tip gap value. Tooth gap adjustment device for crushing device. In the gear tip gap adjusting device of the crushing device according to claim 1,
An addendum clearance adjusting device for a crushing device, comprising an addendum clearance display device (32) for displaying an addendum clearance value calculated by the control device (30). A crushing chamber (6) having a V-shaped cross section is formed by a fixed tooth (4) provided on the frame (3) and a moving tooth (5) which faces the fixed tooth (4) and is swingable. The crushing device adjusts the tooth gap between the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5) by moving the lower end (5a) of (5). In the tooth tip clearance adjustment method,
Moving the lower end (5a) of the moving tooth (5) to bring the lower end (4a) of the fixed tooth (4) into contact with the lower end (5a) of the moving tooth (5);
The position of the lower end (5a) of the moving tooth (5) when contacted is detected, and the lower end (5a) of the fixed tooth (4), the moving tooth (5) and the moving tooth (5) with reference to this detection position Calculating and storing the tip gap characteristics corresponding to the position of the lower end (5a) of the moving tooth (5) based on the geometric relationship with the position of
A step of displaying the tooth tip gap value based on the stored tooth tip gap characteristic on the tooth tip gap display device (32);
The operator moves the lower end portion (5a) of the moving tooth (5) while observing the tooth gap value displayed on the tooth gap display device (32), and when the desired tooth gap is reached, the moving tooth And (5) a step of stopping the movement of the lower end portion (5a). In the gear tip gap adjusting device of the crushing device according to claim 1,
The control device (30) is an operation detected by the position detection means (22) when the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5) are first contacted. Store the position of the fulcrum (12) as the initial reference position,
Every time contact is detected by the contact detection means (28), the difference value between the position of the operation fulcrum (12) detected by the position detection means (22) and the stored initial reference position is calculated, and the fixed teeth (4) and A tip clearance adjustment device for a crushing device, characterized in that the amount of wear of a moving tooth (5) is obtained. In the gear tip gap adjusting device of the crushing device according to claim 4,
The control device (30) presets and stores the position of the operating fulcrum (12) or the wear amount limit value corresponding to the wear limit of the fixed tooth (4) and the moving tooth (5) based on the initial reference position. Aside,
Every time contact is detected by the contact detection means (28), the position of the operation fulcrum (12) detected by the position detection means (22) is compared with the position corresponding to the stored wear limit, or the calculation is performed. A tip clearance adjustment device for a crushing device, wherein the wear amount is compared with the stored wear amount limit value to determine whether or not the wear limit has been reached. In the gear tip gap adjusting device of the crushing device according to claim 5,
A wear notification device (33) is provided to notify that the fixed tooth (4) and the moving tooth (5) have reached the wear limit when an alarm command is input,
When the control device (30) determines that the fixed tooth (4) and the moving tooth (5) have reached the wear limit, the crushing feature is characterized by outputting the alarm command to the wear notification device (33). Device tooth gap adjustment device. A fixed tooth (4) provided on the frame (3) and a moving tooth (5) which is swingable facing the fixed tooth (4) form a crushing chamber (6) having a V-shaped cross section, A toggle block (13) in which the upper end of the jaw (16) with the teeth (5) attached is pivotally supported by the eccentric shaft (7) so that it can be moved eccentrically, and the lower part thereof is movable by the drive means (20). The jaw plate has a jaw crusher (2) that is movably constrained by an arc motion of the other end of the toggle plate (10) with one end attached to the base plate, and a toggle block ( 13) and the lower part of the jaw (16) through the toggle plate (10), and the tooth between the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5) In the tooth tip clearance adjusting device of the crushing device that adjusts the tip clearance,
Contact detection means (28) for detecting contact between the lower end (4a) of the fixed tooth (4) and the lower end (5a) of the moving tooth (5);
Position detection means (22) for detecting the position of the operation fulcrum (12) on one end side which forms the base point of the circular motion of the toggle plate (10);
Tooth tip gap setting means (36) for setting the target tooth tip gap value;
The target tooth gap value set by the tooth gap setting means (36) is stored in advance, and when the tooth gap is adjusted, detection signals from the contact detection means (28) and the position detection means (22) are input, Based on the position of the operating fulcrum (12) when contact is detected, the geometric relationship between the positions of the fixed tooth (4), moving tooth (5), toggle plate (10), and operating fulcrum (12) Based on the actual tooth tip clearance corresponding to the position of the operation fulcrum (12), the deviation value between this tooth tip actual clearance value and the stored target tooth tip clearance value is always calculated, and the deviation value is substantially zero. And a control device (30) for automatically adjusting the actual tooth tip clearance by outputting a command signal to the drive means (20) so as to become a tooth tip clearance adjusting device for a crushing device. In the gear tip gap adjusting device of the crushing device according to claim 7,
An addendum clearance adjusting device for a crushing device, comprising an addendum clearance display device (32) for displaying the actual addendum clearance value calculated by the control device (30) and the set target addendum clearance value . In the gear tip gap adjusting device of the crushing device according to claim 1,
It has operation limit detection means (23) for detecting that the operation fulcrum (12) has reached the predetermined operation limit range on the tooth gap opening side,
The control device (30) receives detection signals from the position detection means (22) and the operation limit detection means (23), and the position of the operation fulcrum (12) detected by the position detection means (22) during the crushing operation is determined. When the predetermined deviation allowable range is exceeded, or when it is determined that the operation fulcrum (12) has reached the operation limit range based on the detection signal of the operation limit detection means (23), the eccentric shaft (7) Output device for stopping the operation of the jaw crusher (2) and the supply device (9) for supplying the object to be crushed to the jaw crusher (2). . In the gear tip gap adjusting device of the crushing device according to claim 1,
In the control device (30), the operation fulcrum (12) after the adjustment of the tooth tip clearance is preset in the vicinity of the reference position at the time of contact between the fixed tooth (4) and the moving tooth (5) at the time of the tooth tip clearance adjustment. A crushing device characterized by outputting a command signal to stop the operation of the jaw crusher (2) by the eccentric shaft (7) and / or the operation of the supply device (9) when entering the movement prohibited region. Tooth gap adjustment device. In the gear tip gap adjusting device of the crushing device according to claim 9 or 10,
A plurality of crushing devices (1a, 1b ...) are arranged in series, and the crushing device on the downstream side performs crushing by receiving the supply of crushed material from the crushing material conveying device (52a) of the crushing device (1a) on the upstream side When the operation of the jaw crusher (2b) and / or the supply device (9b) of (1b) is stopped, the jaw crusher (2a), the supply device (9a) and the crushed material of the upstream crushing device (1a) at the same time Crushing device teeth characterized in that the crushing device (1b) on the downstream side has output means (53, 54) for outputting a command signal for stopping the operation of at least the supply device (9a) of the conveying device (52a). Tip clearance adjustment device.

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