JP2011251203A - Twin-shaft crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a twin-shaft crusher capable of efficiently ejecting a foreign substance, which is clogging in crushing blades without being crushed.SOLUTION: In the twin-shaft crusher 1A, an opening 9 for ejecting a foreign substance is formed. The opening 9 is lateral to a crushing shaft 5 having a faster rotation speed in a crushing chamber 2, and is provided with an upper scraper 15 and a lower scraper 17. A lower part of the opening 9 is closed by a partition plate 19 that rotates together with the lower scraper 17. Upon ejecting a foreign substance, the upper and lower scrapers 15, 17 are moved from scraping positions 15A, 17A to retracting positions 15B, 17B. The partition plate 19 moves to a foreign substance ejecting position 19B where the plate is tilted obliquely downward from the side of the crushing shaft 5 in which the lower part of the opening 9 is closed. Then the foreign substance is ejected by passing between the upper scraper 15 and the partition plate 19. After the foreign substance is ejected, the upper and lower scrapers 15, 17 and the partition plate 19 are returned to the original positions, to regain a substantially closed state of the opening 9.

Description

  The present invention relates to a biaxial crusher provided with a foreign matter removing mechanism for removing foreign matters that are not crushed in a crushing chamber and clogged between two crushing shafts.

  In a biaxial crusher used for crushing waste etc., if non-crushable foreign substances such as iron-based foreign substances are introduced, clogging between crushing blades may occur and normal crushing operation may be hindered. There is. Therefore, in a hydraulic biaxial crusher, the drive hydraulic pressure for rotationally driving the crushing shaft to which the crushing blade is attached is monitored, and if it is detected that the drive hydraulic pressure has risen abnormally due to clogging with foreign matter, The shaft is stopped to remove clogged foreign matter. In the case of an electric biaxial crusher, when the increase in motor load is detected by monitoring the motor drive current, the crushing shaft is stopped to remove foreign matter.

  In the foreign matter removal operation, the foreign matter discharge port formed on the side surface of the crushing chamber is opened and, for example, one of the crushing shafts is rotated in the reverse direction to that during the crushing operation to extrude the foreign matter clogged between the crushing blades. It is discharged from the exit. The foreign matter outlet is blocked by a damper in a normal crushing operation. A biaxial crusher equipped with a foreign matter removing mechanism is disclosed in Patent Document 1.

Japanese Patent No. 3012508

  Here, the damper blocking the foreign matter discharge port is locked at the blocking position by a lock pin or the like so as not to open during the crushing operation. For example, the conventional biaxial crusher 100 shown in FIG. 6 includes a crushing chamber 103 in which two crushing shafts 101 and 102 are horizontally arranged parallel to each other, and the crushing shaft 101 on the high-speed rotation side is provided. A foreign matter discharge port is provided at a portion of the side of the crushing chamber on the side of the hopper 104 for introducing the object to be crushed into the crushing chamber 103 from the side of the crushing chamber. The damper 105 can be opened by a hydraulic cylinder 106 as indicated by an imaginary line. The lock mechanism that locks the damper 105 in the blocking position includes a lock pin 108 that can be inserted and removed by a cylinder 107 attached to the side of the crushing chamber, and a pin insertion bracket 109 attached to the damper 105 side. Yes.

  In this case, when closing the damper 105 after discharging the clogged foreign matter, thick dust may be caught between the damper 105 and the outer peripheral edge portion (opening seal portion) of the foreign matter discharge port. If the damper 105 cannot be closed securely, the lock pin 108 does not enter the bracket 109 and the damper 105 cannot be locked. In the case of a biaxial crusher that performs foreign matter discharge operation by automatic control, if the damper lock state is not formed, the foreign matter discharge step does not end and an alarm is issued. It is necessary for the worker or the supervisor to go to the installation site of the biaxial crusher and perform recovery work such as removal of trapped dust, and during that time, the crushing work is interrupted, resulting in a reduction in work efficiency.

  In view of the above, the present invention has been made in view of such a problem. A twin-screw crusher that can efficiently discharge foreign substances clogged between the crushing blades outside the crushing chamber without using a foreign substance discharge port that is opened and closed by a damper. It is to propose.

In order to solve the above problems, the present invention provides a first crushing shaft in which a first crushing blade is fixed at a predetermined interval, a second crushing shaft in which a second crushing blade is fixed at a predetermined interval, and the first crushing shaft. In the biaxial crusher having a crushing chamber in which the first and second crushing shafts are arranged in parallel so that the second crushing blades are in a state of being intertwined with each other,
An opening for discharging foreign matter that opens to the side of the first crushing shaft in the crushing chamber;
An upper scraper provided on the upper edge side of the opening and provided with a comb-like blade tip portion that can be inserted between the first crushing blades of the first crushing shaft;
A lower scraper provided on the lower edge side of the opening and provided with a comb-like blade tip portion that can be inserted between the first crushing blades of the first crushing shaft;
The upper scraper is moved so that the scraping position in which the blade edge portion of the upper scraper is inserted between the first crushing blades and the retreat position in which the blade edge portion is retracted to the outside of the first crushing blade are switched. Upper scraper moving means,
A lower scraper holding means for holding the lower scraper in a state where the blade edge portion is inserted between the first crushing blades;
When the upper scraper is substantially blocked by the upper scraper at the scraping position and the upper scraper is moved to the retracted position, crushing occurs between the first and second crushing blades through the opening. It is characterized in that it is possible to discharge clogged foreign matter without being lost.

  In the biaxial crusher having this configuration, in the crushing operation, both the upper scraper and the lower scraper are positioned at the scraping position. For example, the first crushing shaft is rotated at a high speed, the second crushing shaft is rotated at a low speed, and an object to be crushed is inserted between them to perform crushing. The crushed material falls from the bottom of the crushing chamber and is collected. Resin foreign matter entangled with the crushing blade during the crushing operation is scraped off by the upper and lower scrapers. During the crushing operation, the foreign matter discharge opening is substantially blocked by the upper scraper and the lower scraper, and the crushed material is substantially prevented from being discharged through the opening.

  When foreign matter such as iron-based foreign matter is clogged between the crushing shafts, the crushing shaft is stopped, and the clogged foreign matter is removed and discharged. In this case, the upper scraper is moved to the retracted position. As a result, foreign matter can be discharged through the foreign matter discharge opening. In this state, for example, the first crushing shaft is rotated in the direction opposite to that during the crushing operation, and the second crushing shaft is rotated in the same direction, so that the clogged foreign matter is sent upward and removed. The foreign matter discharged from between these is sent out in the rotation direction by the first crushing shaft and discharged out of the crushing chamber from the foreign matter discharge port on the side of the crushing chamber.

Next, the present invention includes a first crushing shaft in which the first crushing blade is fixed at a predetermined interval, a second crushing shaft in which the second crushing blade is fixed at a predetermined interval, and the first and second crushing blades. In a biaxial crusher having a crushing chamber in which the first and second crushing shafts are arranged in parallel so as to be in an intertwined state,
An opening for discharging foreign matter that opens to the side of the first crushing shaft in the crushing chamber;
An upper scraper provided on the upper edge side of the opening and provided with a comb-like blade tip portion that can be inserted between the first crushing blades of the first crushing shaft;
A comb-shaped cutting edge that is rotatably supported around a lower shaft disposed in parallel to the first crushing shaft on the lower edge side of the opening and can be inserted between the first crushing blades of the first crushing shaft. A lower scraper with a portion,
A partition plate that is supported rotatably about the lower shaft, is capable of sealing at least the lower portion of the opening, and has a comb blade-shaped upper end portion that can be inserted between the first crushing blades;
An upper scraper moving means for moving the upper scraper to switch the blade tip portion between the first crushing blade and the state retracted to the outside of the first crushing blade;
A rotating means for rotating the lower scraper and the partition plate about the lower shaft;
When the cutting edge portion of the lower scraper rotates to the scraping position where it enters between the first crushing blades, the partition plate rotates to the blocking position blocking the lower portion of the opening, and the lower scraper When the blade tip portion of the scraper rotates to the retracted position retracted to the outside of the first crushing blade, the partition plate extends obliquely upward toward the first crushing shaft, and the upper end portion thereof is the first crushing blade. Rotate to the foreign object discharge position
The opening is substantially blocked by the upper scraper at the scraping position and the partition plate at the blocking position, and the opening is opened when the upper scraper and the lower scraper are moved to the retracted position. It is characterized by being in a state.

  In the biaxial crusher having this configuration, by moving the lower scraper from the scraping position to the retracted position, dust caught in the vicinity of the lower scraper can be scraped off. Further, when the partition plate is rotated to the foreign matter discharge position, the partition plate extends obliquely downward from the first crushing shaft, so that the partition plate functions as a foreign matter discharge chute.

  Here, the upper scraper is supported on the upper end edge side of the opening so as to be swingable around an upper shaft disposed in parallel to the first crushing shaft, and the upper scraper moving means is centered on the upper shaft. The upper scraper is rotated from the retraction position rotated outward from the opening to the inside of the crushing chamber with the cutting edge portion of the upper scraper entering the first crushing blade. A swinging means for swinging to the moved position, between the upper scraper in the retracted position and the partition plate in the foreign matter discharging position, between the first and second crushing blades It is desirable to form a foreign matter discharge path for discharging clogged foreign matter.

  In this way, by swinging the upper scraper, dust and the like clogged in the vicinity of the upper scraper can be efficiently scraped off. In addition, the foreign matter removed from between the crushing shafts is efficiently crushed through a foreign matter discharge path defined by the upper scraper that has been swung to the retreat position and the partition plate that is opposed to the foreign matter discharge position. Can be discharged out of the chamber.

  Next, as the upper scraper moving means, the upper scraper is arranged such that the cutting edge portion of the upper scraper is in a scraping position where it enters the first crushing blade and a retreating position where it is retracted to the outside of the first crushing blade. It is also possible to use a linear motion means for linearly reciprocating.

On the other hand, in the biaxial crusher of the present invention, the upper scraper can be a rotary type and the lower scraper can be a fixed type. In this case, the biaxial crusher of the present invention is
An opening for discharging foreign matter that opens to the side of the first crushing shaft in the crushing chamber;
Comb-like shape that is supported on the upper edge of the opening so as to be rotatable about an upper shaft that is arranged in parallel to the first crushing shaft and that can be inserted between the first crushing blades of the first crushing shaft. A rotary upper scraper with a blade edge part,
A fixed lower scraper extending obliquely upward from the lower end edge side of the opening toward the first crushing axis, and a comb-tooth shaped blade edge portion formed at the tip portion entering between the first crushing blades;
An inclined surface for discharging foreign matter formed on the fixed lower scraper and extending obliquely downward from the first crushing shaft toward the lower edge of the opening;
The rotary upper scraper is rotated about the upper shaft to a scraping position where the cutting edge portion enters between the first crushing blades and a retreating position where the blade is retracted outward from the first crushing blades. Upper scraper rotating means,
When the opening is substantially blocked by the rotary upper scraper in the scraping position and the rotary upper scraper is moved to the retracted position, the upper scraper and the inclined surface for discharging foreign matter A foreign matter discharge path for discharging foreign matter clogged between the first and second crushing blades is formed therebetween.

  In this case, the upper scraper rotating means is configured so that the upper scraper is centered on the upper shaft, and the cutting edge portion of the crushing chamber is centered on the foreign material scraping position where the blade tip portion enters the first crushing blade. It is desirable that the swinging means swings between a retracted position rotated outward and a position rotated toward the inside of the crushing chamber. By swinging the upper scraper, the dust adhering to the crushing blade can be efficiently scraped off.

  Further, an upper partition plate that rotates together with the upper scraper about the upper shaft is disposed, and when the upper scraper rotates to the scraping position, the upper partition plate blocks the upper portion of the opening. When the upper scraper is rotated to the retracted position, the upper partition plate can be rotated to the retracted position retracted to the outside of the crushing chamber.

  Instead of the upper partition plate, the lower partition plate can be arranged on the fixed lower scraper side. In this case, on the lower edge side of the opening, the lower partition plate that is rotatable about a lower axis that extends parallel to the first crushing axis, and the lower partition plate that has the opening about the lower axis. What is necessary is just to arrange | position the lower rotation means to rotate to the sealing position which sealed at least the lower part of the part, and the retracted position retracted | saved outside the said crushing chamber. In addition, it is preferable that an inclined surface that is continuous with a lower end of the inclined surface for discharging foreign matter is formed by the lower partition plate rotated to the retracted position. In this way, the fixed lower scraper and the lower partition plate rotated to the retracted position function as a foreign matter discharge sheet, and foreign matters taken out between the crushing blades can be efficiently discharged out of the crushing chamber.

  Also in this case, the upper scraper rotating means, the upper scraper with the upper shaft as the center, the scraper from the opening portion with the cutting edge portion entering the first crushing blade as the center. Desirably, the swinging means swings from a retracted position rotated to the outside of the chamber to a position rotated to the inside of the crushing chamber.

  In the biaxial crusher of the present invention, the upper and lower scrapers arranged on the side surface of the crushing chamber are substantially provided with foreign matter discharge openings for discharging the foreign matter clogged between the crushing blades without being crushed from the crushing chamber. When the foreign matter is discharged, at least the upper scraper is moved to open the opening and discharge the foreign matter from the crushing chamber. Therefore, as in the case of opening and closing the opening with a damper, there is no problem such as dust being clogged between the damper and the opening and the damper cannot be closed securely, and the discharge of foreign substances clogged between the crushing blades is prevented. Processing can be efficiently performed by automatic processing.

(A) is a schematic side view which shows the biaxial crusher which concerns on Embodiment 1 which applied this invention in the state which removed the foreign material discharge cover, (b) is a schematic cross-sectional view which shows the foreign material discharge mechanism (C) is explanatory drawing which shows the shape of the upper scraper, a lower scraper, and a lower partition board, (d) is a schematic cross-sectional view which shows the state at the time of foreign material discharge | emission. (A) is a schematic side view which shows the biaxial crusher which concerns on Embodiment 2 to which this invention is applied in the state which removed the foreign material discharge cover, (b) is a schematic cross-sectional view which shows the foreign material discharge mechanism. (C) is a schematic cross-sectional view showing a state when discharging foreign matter. (A) is a schematic cross-sectional view which shows the foreign material discharge mechanism of the biaxial crusher which concerns on Embodiment 3 to which this invention is applied, (b) is a schematic cross-sectional view which shows the state at the time of the foreign material discharge | emission. . (A) is a schematic cross-sectional view which shows the foreign material discharge mechanism of the biaxial crusher based on Embodiment 4 to which this invention is applied, (b) is a schematic cross-sectional view which shows the state at the time of the foreign material discharge | emission. . (A) is a schematic cross-sectional view which shows the foreign material discharge mechanism of the biaxial crusher which concerns on Embodiment 5 to which this invention is applied, (b) is a schematic cross-sectional view which shows the state at the time of the foreign material discharge | emission. . (A)-(c) is a side view which shows the conventional biaxial crusher, a cross-sectional view, and explanatory drawing which shows a damper lock mechanism.

  Hereinafter, an embodiment of a biaxial crusher to which the present invention is applied will be described with reference to the drawings.

(Embodiment 1)
FIG. 1A is a schematic side view showing a biaxial crusher according to Embodiment 1 to which the present invention is applied, and shows a state where a foreign matter discharge cover is removed, and FIG. It is a schematic cross-sectional view which shows a mechanism. FIG. 1 (c) is an explanatory view showing the shapes of the upper scraper, the lower scraper and the lower partition plate, and FIG. 1 (d) is a schematic cross-sectional view showing the state when discharging foreign matter. The basic configuration of the biaxial crusher 1A of the first embodiment is the same as that of a general biaxial crusher. The crushing chamber 2, the hopper 3 provided on the upper side of the crushing chamber 2, and the crushing chamber 2 And a drive mechanism section 4 disposed on the side.

  Inside the crushing chamber 2, as can be seen from FIG. 1 (b), two crushing axes are arranged horizontally in parallel. One crushing shaft 5 is a high-speed crushing shaft, and the other crushing shaft 6 is a low-speed crushing shaft. These crushing shafts 5 and 6 are provided with crushing blades 7 and 8 sandwiching spacers along their axial directions, so that both crushing blades 7 and 8 are in an alternating state. , 6 are arranged. Between these crushing shafts 5 and 6, the object to be crushed charged from the upper hopper 3 is supplied, and the crushed object after being crushed falls from the bottom opening of the crushing chamber 2 and is collected. ing.

  The side of the crushing shaft 5 on the high speed side in the crushing chamber 2 is an opening 9 for discharging foreign matter. The outside of the opening 9 is a foreign matter discharge chamber 11 covered with a foreign matter discharge cover 10, and foreign matter falls downward from the bottom side of the foreign matter discharge chamber 11 and is collected.

  The drive mechanism unit 4 includes a drive motor 12 for individually rotating and driving the two crushing shafts 5 and 6, and a speed reduction mechanism 13 for reducing the rotation of the drive motor 12 and transmitting it to the crushing shafts 5 and 6. Has been. The drive motor 12 may be either a hydraulic type or an electric type. In addition, when two drive motors 12 are arranged on each of the crushing shafts 5 and 6, a single drive motor 12 is arranged, and the output rotation from the crushing shafts 5 and 6 via the speed reduction mechanism 13 Any of the cases of distribution to

  Next, a plate-shaped upper scraper 15 is attached to the upper end edge side of the opening 9 for discharging foreign matter. The cutting edge portion of the upper scraper 15 is a comb-shaped cutting edge portion 15a that can be inserted between the crushing blades 7 of the crushing shaft 5 on the high speed side. Further, the rear end portion of the upper scraper 15 is supported so as to be swingable around an upper shaft 16 disposed in parallel with the crushing shaft 5 along the upper end edge of the opening 9.

  A plate-shaped lower scraper 17 is also attached to the lower end edge side of the opening 9. The lower scraper 17 is supported so as to be rotatable around a lower shaft 18 disposed in parallel with the crushing shaft 5 along the lower edge of the opening 9, and the blade tip portion is interposed between the crushing blades 7 of the crushing shaft 5. It is a comb-like blade edge portion 17a that can be inserted. The lower shaft 18 is supported at the upper end position of the mounting member 2 a having a predetermined height standing from the bottom surface of the crushing chamber 2. A partition plate 19 is attached to the rear end of the lower scraper 17 on the lower shaft 18 side. Therefore, the partition plate 19 is also rotatable around the lower shaft 18, and the upper end portion 19 a is a comb blade-shaped upper end portion that can be inserted between the crushing blades 7.

  Next, the upper shaft 16 of the upper scraper 15 is rotated by a hydraulic cylinder 20a (upper scraper rotating means). By driving the hydraulic cylinder 20a, the upper scraper 15 is centered on the upper shaft 16 from the opening 9 to the outside of the crushing chamber 2 around the scraping position 15A where the cutting edge portion 15a enters the crushing blade 7. It can swing between the retreated retracted position 15B and the position 15C rotated to the inside of the crushing chamber 2.

  Similarly, the lower shaft 18 of the lower scraper 17 is also rotated by a hydraulic cylinder 20b (lower scraper rotating means). By driving the hydraulic cylinder 20b, the lower scraper 17 is moved to a scraping position 17A where the blade edge portion 17a enters between the crushing blades 7, and to a retracted position 17B where the blade edge portion 17a is disengaged downward from the crushing blade 7. It can be rotated. The partition plate 19 that rotates in conjunction with the lower scraper 17 rotates to the blocking position 19A that blocks the lower portion of the opening 9 when the lower scraper 17 rotates to the scraping position 17A. When the lower scraper 17 is rotated to the retreat position 17B, it is set so as to extend obliquely upward toward the crushing shaft 5 and its upper end portion 19a is rotated to the foreign matter discharge position 19B that has entered between the crushing blades 7. .

  In the crushing operation of the biaxial crusher 1A having this configuration, as shown in FIG. 1B, the upper scraper 15 and the lower scraper 17 are positioned at the scraping positions 15A and 17A, respectively, and the partition plate 19 is opened. 9 is positioned at a blocking position 19A that blocks the lower portion of 9. Since the opening 9 is substantially sealed by the upper and lower scrapers 15 and 17 and the partition plate 19, the object to be crushed or the crushed material obtained by crushing is discharged from the opening 9 to the foreign matter discharge chamber 11 side. There is almost no being done. Even if the crushed material is discharged to the foreign matter discharge chamber 11 side, the foreign matter discharge chamber 11 is covered with the foreign matter discharge cover 10 and is collected by dropping from the bottom opening thereof. There is no end.

  In the crushing operation, as indicated by solid arrows in FIG. 1B, the crushing shafts 5 and 6 rotate in the direction in which the crushing blades 7 and 8 bite the crushing object input from the hopper. Further, the blade edge portions 15 a and 17 a of the upper and lower scrapers 15 and 17 are inserted between the crushing blades 7 of the crushing shaft 5 on the high speed side.

  The crushing blade on the high speed side is easily rotated compared to the crushing blade on the low speed side because the rotation is fast. When soft plastic or the like is wound, the crushing blade tends to wear faster. In this example, since dusts such as soft plastic are removed by the upper and lower scrapers 15 and 17, the wear of the crushing blade 7 and the spacer can be reduced, and the life of these can be extended.

  Next, during the crushing operation, if an iron-based foreign material or the like is clogged between the crushing shafts 5 and 6, the driving load becomes excessive. Such clogging of foreign matters can be detected by monitoring the hydraulic pressure in the case of the hydraulic drive type and by monitoring the drive voltage in the case of the electric type. When it is detected that the foreign matter is clogged, the crushing shafts 5 and 6 are stopped. Next, the lower scraper 17 is rotated from the scraping position 17A to the retracted position 17B. Thereby, the partition plate 19 rotates to the foreign matter discharge position 19B. Further, the upper scraper 15 is also rotated from the scraping position 15A to the retracted position 15B. FIG. 1 (d) shows this state.

  As the lower scraper 17 rotates, dust such as soft plastic attached thereto is scraped off. In addition, by swinging the upper scraper 15 between the positions 15B and 15C, dust adhered to the crushing blade 7 and the like is surely scraped off. Further, as shown in FIG. 1D, the partition plate 19 extends obliquely downward from the crushing shaft 5 at the foreign matter discharge position 19B, and the foreign matter guides the foreign matter from the crushing chamber 2 to the foreign matter discharge chamber 11. It can function as a discharge chute.

  In this state, the crushing shaft 5 on the high speed side is reversely rotated as shown by the broken line arrow in FIG. 1D, and the crushing shaft 6 on the low speed side is rotated forward as shown by the solid line arrow. Thereby, the foreign matter clogged between them is sent out upward and sent out to the opening 9 side by the crushing shaft 5 on the high speed side. The delivered foreign matter slides down on the partition plate 19 and is sent to the foreign matter discharge chamber 11 side, and is dropped and collected from the bottom opening. After the foreign matter discharging operation is completed, the crushing shaft is stopped, the upper and lower scrapers 15 and 17 are returned to the scraping position, and the partition plate 19 is returned to the blocking position. Thereby, it returns to the state of FIG.1 (b). In this state, the crushing operation is started again.

  As described above, in the biaxial crusher 1A, since the scrapers 15 and 17 are arranged above and below the crushing shaft 5 on the high speed side, adhesion of dust such as soft plastic can be removed, and a crushing blade, The lifetime of the spacer can be extended. In addition, since there is no sealing plate such as a damper in the opening for discharging foreign matter, there is no problem that dust is clogged between the damper and the opening seal portion and a damper locked state cannot be formed.

(Embodiment 2)
FIG. 2 is a schematic side view showing the biaxial crusher according to Embodiment 2 to which the present invention is applied with the foreign matter discharge cover removed, and (b) is a schematic cross-sectional view showing the foreign matter discharge mechanism. (C) is a schematic cross-sectional view showing a state when discharging foreign matter.

  The basic configuration of the biaxial crusher 1B of the second embodiment is the same as that of the biaxial crusher 1A described above, and the difference is that the upper scraper moves back and forth linearly. Accordingly, corresponding parts are denoted by the same reference numerals, and only the differences will be described.

  The upper scraper 21 of the biaxial crusher 1B is held in a posture extending obliquely downward from the upper end edge side of the opening 9 toward the crushing shaft 5. That is, rails 22 are fixed to the left and right of the frame 3a of the hopper 3, and a plate-shaped upper scraper 21 is slidable along the rails 22 between the rails 22. It is laid over. A fixed frame 23 is bridged between the upper ends of the rails 22, and a hydraulic cylinder 24 (upper scraper moving mechanism) is fixed to the center of the fixed frame 23. An upper scraper 21 is connected to the tip of the telescopic rod 24 a of the hydraulic cylinder 24.

  The cutting edge portion of the upper scraper 21 is a comb-shaped cutting edge portion 21 a that can enter between the crushing blades 7.

  In the crushing operation, the state shown in FIG. In the operation of removing the foreign matter, as shown in FIG. 2C, the upper scraper 21 at the scraping position 21A that has entered between the crushing blades 7 is pulled upward and moved to the retreat position 21B. Further, the lower scraper 17 also moves to the retreat position 17B, and the partition plate 19 moves to the foreign matter discharge position 19B. As a result, the opening 9 is opened, and foreign matter removed from the crushing shafts 5 and 6 can be discharged to the foreign matter discharge chamber 11 side by sliding the partition plate 19 down. In addition, the rotation direction of the crushing shafts 5 and 6 when the foreign matter is discharged is the same as that in the first embodiment.

(Embodiment 3)
FIG. 3A is a schematic cross-sectional view showing a foreign matter discharge mechanism of a biaxial crusher according to Embodiment 3 to which the present invention is applied, and FIG. 3B is a schematic cross-sectional view showing a state during discharge of the foreign matter. It is. The basic configuration of the biaxial crusher 1C of the third embodiment is a rocking type as in the first embodiment, but the lower scraper is a fixed type. In the following description, parts different from the first embodiment will be described, and description of other parts will be omitted.

  The biaxial crusher 1C includes an upper scraper 15 supported so as to be rotatable around an upper shaft 16 disposed in parallel with the crushing shaft 5 on the high speed side along the upper edge of the opening 9, and this The cutting edge portion of the upper scraper 15 is a comb-shaped cutting edge portion 15a that can be inserted between the crushing blades 7 of the crushing shaft 5, and is the same as in the first embodiment.

  On the other hand, the lower scraper 31 disposed on the lower end edge side of the opening 9 is a fixed type, and is attached to the mounting base 32 attached between the crushing chamber 2 and the bottom surface portion of the foreign matter discharge chamber 11. The rear end of the lower scraper 31 is fixed by bolting. The lower scraper 31 is composed of a number of plates attached at regular intervals extending obliquely upward between the crushing blades 7 of the crushing shaft 5, and the cutting edge portion 31 a of each plate is a crushing blade 7. It is in a state of getting in between.

  Moreover, the upper end surface 31b of the lower scraper 31 is an inclined end surface that is inclined obliquely downward from the crushing shaft 5 side toward the foreign matter discharge chamber 11 side. It functions as a foreign matter discharge chute surface that slides down the foreign matter removed from 6 and sent out by the crushing shaft 5.

  The effect similar to the case of Embodiment 1 is obtained also by the biaxial crusher 1C of this structure. Further, since the opening 9 is not provided with parts such as a cover, the dust scraped off by the upper scraper 15 and the lower scraper 31 slides down the upper end surface 31b of the lower scraper 31 and is discharged to the foreign matter discharge chamber 11 side. Is done. Therefore, since dust does not accumulate between the upper and lower scrapers 15, 31, wear of the crushing blade and the spacer can be reduced.

(Embodiment 4)
FIG. 4A is a schematic cross-sectional view showing a foreign matter discharge mechanism of a biaxial crusher according to Embodiment 4 to which the present invention is applied, and FIG. 4B is a schematic cross-sectional view showing a state during discharge of the foreign matter. It is. The biaxial crusher 1D according to the fourth embodiment has the same structure as the biaxial crusher 1C according to the third embodiment, but an upper partition plate that is linked to the upper scraper is provided on the upper scraper 15 side. Is different.

  That is, in the biaxial crusher 1D, the upper partition plate 41 that rotates together with the upper scraper 15 about the upper shaft 16 is provided on the upper edge side of the opening 9. When the upper scraper 15 rotates to the scraping position 15A, the upper partition plate 41 rotates to the blocking position 41A that blocks the upper portion of the opening 9. When the upper scraper 15 is rotated to the retracted position 15B, the upper scraper 15 is rotated to the retracted position 41B retracted to the foreign matter discharge chamber 11 side. Unlike the case of the above-described biaxial crusher 1C, the upper scraper 15 does not rotate toward the position 15C retracted toward the crushing chamber, but rotates between the scraping position 15A and the retracted position 15B. It is set to (oscillate).

  In the biaxial crusher 1D having this configuration, the same effects as those of the biaxial crusher 1C can be obtained. Further, in the crushing operation, the upper part of the opening 9 is sealed by the upper partition plate 41, so that the amount of crushed material discharged to the foreign matter discharge chamber 11 side can be reduced.

(Embodiment 5)
FIG. 5A is a schematic cross-sectional view showing a foreign matter discharge mechanism of a biaxial crusher according to Embodiment 5 to which the present invention is applied, and FIG. 5B is a schematic cross-sectional view showing a state during discharge of the foreign matter. It is. The biaxial crusher 1E according to the fifth embodiment has the same structure as that of the biaxial crusher 1C according to the third embodiment, but includes a rotary lower partition plate on the fixed side lower scraper 31 side. The point is different.

  That is, the biaxial crusher 1 </ b> E includes a lower partition plate 52 that can rotate around a lower shaft 51 that extends parallel to the crushing shaft 5 along the lower edge of the opening 9. Further, the lower partition plate 52 is a sealed position in which the lower portion of the opening 9 is sealed around the lower shaft 51 by the rotating means having the same configuration as the hydraulic cylinders 20a and 20b shown in FIG. 52A and the retreat position 52B retracted to the foreign matter discharge chamber 11 side can be rotated.

  Further, the surface 52 a facing the upper side of the lower partition plate 52 rotated to the retreat position 52 </ b> B can form an inclined surface that is continuous with the upper end surface 31 b of the lower scraper 31. Therefore, when the foreign matter is discharged as shown in FIG. 5B, the upper end surface 31b of the lower scraper and the surface 52a of the lower partition plate 52 function as the foreign matter discharge chute surface, and the foreign matter is slid down to the foreign matter discharge chamber 11 side. .

  The biaxial crusher 1E having this configuration has the same effects as the biaxial crusher 1C described above, and the lower side of the opening 9 is blocked by the lower partition plate 52 during the crushing operation. The amount of crushed material that is discharged to the side can be reduced.

1A, 1B, 1C, 1D, 1E Biaxial crusher 2 Crushing chamber 3 Hopper 4 Drive mechanism 5 Crushing shaft 6 Crushing shaft 7, 8 Crushing blade 9 Opening 10 Foreign matter discharge cover 11 Foreign matter discharge chamber 12 Drive motor 13 Deceleration mechanism 15 Upper scraper 15A Scraping position 15B Retraction position 15C Position 15a Blade edge portion 16 Upper shaft 17 Lower scraper 17A Scraping position 17B Retraction position 17a Blade edge portion 18 Lower shaft 19 Bulkhead plate 19A Blocking position 19B Foreign matter discharge position 19a Upper end portions 20a, 20b Hydraulic cylinder 21 Upper scraper 21A Scraping position 21B Retraction position 21a Cutting edge portion 22 Rail 23 Fixed frame 24 Hydraulic cylinder 24a Telescopic rod 31 Lower scraper 31a Cutting edge portion 31b Upper end surface 32 Mounting base 41 Upper partition plate 41A Sealing position 41B Retraction position 51 Lower Shaft 52 Lower partition plate 52A Blocking position 52 B Retraction position 52a Surface

Claims (9)

A first crushing shaft on the high speed rotation side with the first crushing blade fixed at a predetermined interval, a second crushing shaft on the low speed rotation side with the second crushing blade fixed at a predetermined interval, and the first and second crushing blades In a biaxial crusher having a crushing chamber in which the first and second crushing shafts are arranged in parallel so that they are in an intertwined state,
An opening for discharging foreign matter that opens to the side of the first crushing shaft in the crushing chamber;
An upper scraper provided on the upper edge side of the opening and provided with a comb-like blade tip portion that can be inserted between the first crushing blades of the first crushing shaft;
A lower scraper provided on the lower edge side of the opening and provided with a comb-like blade tip portion that can be inserted between the first crushing blades of the first crushing shaft;
The upper scraper is moved so that the scraping position in which the blade edge portion of the upper scraper is inserted between the first crushing blades and the retreat position in which the blade edge portion is retracted to the outside of the first crushing blade are switched. Upper scraper moving means,
A lower scraper holding means for holding the lower scraper in a state where the blade edge portion is inserted between the first crushing blades;
When the upper scraper is substantially blocked by the upper scraper at the scraping position and the upper scraper is moved to the retracted position, crushing occurs between the first and second crushing blades through the opening. A biaxial crusher characterized in that it can discharge clogged foreign matter. A first crushing shaft on the high speed rotation side with the first crushing blade fixed at a predetermined interval, a second crushing shaft on the low speed rotation side with the second crushing blade fixed at a predetermined interval, and the first and second crushing blades In a biaxial crusher having a crushing chamber in which the first and second crushing shafts are arranged in parallel so that they are in an intertwined state,
An opening for discharging foreign matter that opens to the side of the first crushing shaft in the crushing chamber;
An upper scraper provided on the upper edge side of the opening and provided with a comb-like blade tip portion that can be inserted between the first crushing blades of the first crushing shaft;
A comb-shaped cutting edge that is rotatably supported around a lower shaft disposed in parallel to the first crushing shaft on the lower edge side of the opening and can be inserted between the first crushing blades of the first crushing shaft. A lower scraper with a portion,
A partition plate that is supported rotatably about the lower shaft, is capable of sealing at least the lower portion of the opening, and has a comb blade-shaped upper end portion that can be inserted between the first crushing blades;
An upper scraper moving means for moving the upper scraper to switch the blade tip portion between the first crushing blade and the state retracted to the outside of the first crushing blade;
A rotating means for rotating the lower scraper and the partition plate about the lower shaft;
When the cutting edge portion of the lower scraper rotates to the scraping position where it enters between the first crushing blades, the partition plate rotates to the blocking position blocking the lower portion of the opening, and the lower scraper When the blade tip portion of the scraper rotates to the retracted position retracted to the outside of the first crushing blade, the partition plate extends obliquely upward toward the first crushing shaft, and the upper end portion thereof is the first crushing blade. Rotate to the foreign object discharge position
The opening is substantially blocked by the upper scraper at the scraping position and the partition plate at the blocking position, and the opening is opened when the upper scraper and the lower scraper are moved to the retracted position. A biaxial crusher characterized by being in a state. In claim 2,
The upper scraper is supported so as to be swingable about an upper shaft disposed in parallel to the first crushing shaft on the upper edge side of the opening,
The upper scraper moving means pivots the upper scraper about the upper shaft from the opening to the outside of the crushing chamber with a cutting edge portion of the upper scraper moving into the first crushing blade. Swinging means for swinging from the retracted position to a position rotated to the inside of the crushing chamber,
A foreign matter discharge path is formed between the upper scraper at the retracted position and the partition plate at the foreign matter discharge position for discharging foreign matter clogged between the first and second crushing blades. A biaxial crusher characterized by that. In claim 2,
The upper scraper extends obliquely downward from the upper edge side of the opening toward the first crushing shaft,
The upper scraper moving means linearly reciprocates the upper scraper so that a cutting edge position of the upper scraper is in a scraping position where it enters the first crushing blade and a retreat position where it is retracted to the outside of the first crushing blade. A biaxial crusher characterized by being a linear motion means for movement. The first crushing shaft in which the first crushing blade is fixed at a predetermined interval, the second crushing shaft in which the second crushing blade is fixed at a predetermined interval, and the first and second crushing blades are in a state of being intermingled with each other. In the biaxial crusher having a crushing chamber in which the first and second crushing axes are arranged in parallel,
An opening for discharging foreign matter that opens to the side of the first crushing shaft in the crushing chamber;
Comb-like shape that is supported on the upper edge of the opening so as to be rotatable about an upper shaft that is arranged in parallel to the first crushing shaft and that can be inserted between the first crushing blades of the first crushing shaft. A rotating upper scraper with a blade edge part,
A fixed lower scraper extending obliquely upward from the lower end edge side of the opening toward the first crushing shaft and having a comb-like blade edge portion formed at the tip portion entering between the first crushing blades;
A foreign matter discharge inclined surface formed on the lower scraper and extending obliquely downward from the first crushing shaft toward a lower end edge of the opening;
An upper scraper rotating the upper scraper around the upper shaft to a scraping position where the cutting edge portion enters between the first crushing blades and a retreating position retracted to the outside of the first crushing blade. Moving means,
When the upper scraper is substantially blocked by the upper scraper at the scraping position and the upper scraper is moved to the retracted position, the first scraper is disposed between the upper scraper and the inclined surface for discharging foreign matter. A biaxial crusher characterized in that a foreign matter discharge path for discharging foreign matter clogged between the second crushing blades is formed. In claim 5,
The upper scraper rotating means rotates the upper scraper around the upper shaft from the opening to the outside of the crushing chamber with the cutting edge portion being centered on a foreign material scraping position where the blade tip portion has entered the first crushing blade. A biaxial crusher characterized in that it is a swinging means that swings from a moved retreat position to a position rotated toward the inside of the crushing chamber. In claim 5,
An upper partition plate that rotates with the upper scraper about the upper shaft;
When the upper scraper is rotated to the scraping position, the upper partition plate is rotated to a blocking position where the upper portion of the opening is sealed, and when the upper scraper is rotated to the retracted position, the upper partition plate Is rotated to a retracted position retracted to the outside of the crushing chamber. In claim 5,
A lower partition plate pivotable about a lower shaft extending parallel to the first crushing shaft on the lower edge side of the opening,
The lower partition plate, with the lower shaft as a center, has a lower turning means for turning to a closed position where the lower part of the opening is closed and a retracted position retracted to the outside of the crushing chamber,
The biaxial crusher characterized in that an inclined surface that is continuous with a lower end of the inclined surface for discharging foreign matter is formed by the lower partition plate rotated to the retracted position. In claim 8,
The upper scraper rotating means rotates the upper scraper around the upper shaft from the opening to the outside of the crushing chamber with the cutting edge portion being centered on a foreign material scraping position where the blade tip portion has entered the first crushing blade. A biaxial crusher characterized in that it is a swinging means that swings from a moved retreat position to a position rotated toward the inside of the crushing chamber.

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