JP2012081368A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crusher which prevents lowering of crushing efficiency caused with the development of crushing work.SOLUTION: The crusher includes: a crushing device 13 for crushing a material X to be crushed; a conveyor 12 for transporting the material X to the crushing device 13; and a press roller device 14 for pressing the material X on the transporting conveyor 12 by the press roller 24 and supplying the material X to the crushing device 13 by interlocking with the conveyor 12. The press roller 24 includes a plurality of pawl members 42 with tips protruding radially outward direction of the press roller 24. Each tip of the plurality of pawl members 42 can oscillate in the direction of axis of the press roller 24.

Description

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

  As a kind of crusher, a crushing rotor with a plurality of crushing bits provided on the outer peripheral surface is rotated at high speed in the crushing chamber, and the object to be crushed is struck by impact with a crushing bit or an anvil (fixed blade) provided in the crushing chamber. There is something to crush. This type of crusher is provided with a pressure roller facing the conveying surface of the feed conveyor, and the object to be crushed and conveyed on the feed conveyor is pressed by the pressure roller before the crushing device. There is one that pushes the crushed wood into a crushing device in cooperation (see Patent Document 1).

JP 2006-116413 A

  The above pressing roller has a large number of claw members projecting in the normal direction on the outer peripheral surface, so that the force to grip the object to be crushed is enhanced, and by securely gripping the object to be crushed with these claw members, While receiving the crushing reaction force, the object to be crushed can be pressed against the crushing rotor in cooperation with the feed conveyor.

  At this time, since the rotation trajectory drawn by the crushing rotor is cylindrical, the crushing surface of the object to be crushed is formed in an arcuate shape in accordance with the trajectory surface of the crushing rotor. For example, assuming a relatively long object to be crushed, the crushing surface is formed in the process where the object to be crushed reaches the outer peripheral surface of the crushing rotor and gradually crushes from the tip, while keeping the same as the trajectory surface of the crushing rotor. As the process proceeds, the crushing bit rubs the surface of the crushing surface and the crushing efficiency is significantly reduced. This phenomenon can be particularly noticeable because the arc length of the crushing surface can be increased as the object to be crushed has a larger diameter.

  In such a case, the operator reversely drives the supply device (feed conveyor and pressing roller) to once separate the object to be crushed from the crushing apparatus, and then restarts the crushing operation, whereby the operator hits the crushing object against the crushing rotor. The response is to change. However, the operation of this type of crusher is often performed by a heavy machinery operator who inputs the material to be crushed, and the operation of the heavy machinery is interrupted whenever necessary while paying attention to the operational status of the crusher. It is troublesome to perform the reverse operation.

  This invention is made | formed in view of said situation, and it aims at providing the crusher which can suppress the fall of the crushing efficiency accompanying progress of crushing work.

  In order to achieve the above object, the first invention is a crushing device for crushing a material to be crushed, a feed conveyor for conveying the material to be crushed toward the crushing device, and pressing the material to be crushed on the feed conveyor. A pressing roller device that presses with a roller and cooperates with the feed conveyor to supply an object to be crushed to the crushing device, and the pressing roller has a claw member with a tip protruding outward in the radial direction of the pressing roller. A plurality of claw members are provided on the outer peripheral surface, and tip ends of the plurality of claw members can swing in the axial direction of the pressing roller.

  In a second aspect based on the first aspect, the pressing roller includes a plurality of recesses provided on an outer peripheral surface, and the plurality of claw members are respectively attached to the recesses via pins. It is characterized by.

  According to a third aspect of the present invention, in the first or second aspect, when the posture along the plane perpendicular to the rotation center line of the pressure roller is set to the neutral position of the claw member, the pressure roller An urging means for urging the neutral position is further provided.

  According to a fourth invention, in any one of the first to third inventions, a swing range of the claw member is 90 degrees or less.

  According to this invention, the fall of the crushing efficiency accompanying the progress of the crushing work can be suppressed.

It is a side view showing the whole crusher structure concerning one embodiment of the present invention. It is a top view showing the whole crusher structure concerning one embodiment of the present invention. It is the side view which extracted and represented the principal part inside the crusher main-body part with which the crusher which concerns on one Embodiment of this invention was equipped. It is the rear view which extracted and represented the principal part inside the crusher main-body part with which the crusher which concerns on one Embodiment of this invention was equipped. It is a rear view of the press roller with which the crusher which concerns on one Embodiment of this invention was equipped. It is an arrow side view by the VI-VI line in FIG. It is arrow sectional drawing by the VII-VII line in FIG. It is arrow sectional drawing by the VIII-VIII line in FIG. It is a figure showing the other structural example of the nail | claw member with which the crusher which concerns on one Embodiment of this invention was equipped, and is a figure corresponding to FIG. It is a figure showing the further another structural example of the nail | claw member with which the crusher which concerns on one Embodiment of this invention was equipped, and is a figure corresponding to FIG.

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

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

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

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

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

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

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

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

  FIG. 3 is a side view of the main part of the crusher body 2 extracted and shown, and FIG. 4 is a rear view of the crusher main body 2 viewed from the rear.

  As shown in FIGS. 3 and 4, the hopper 11 is a bottomed frame body that is open at the top and front, and is installed horizontally at the rear of the main body frame 10.

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

  The crushing device 13 is mounted at a substantially central position in the front-rear direction of the main body frame 10 so as to be positioned in front of the feed conveyor 12. The crushing device 13 includes the crushing rotor 15 housed in the crushing chamber 27 and an anvil 29 that is a repulsion plate provided on the inner peripheral wall portion of the crushing chamber 27 so as to protrude toward the crushing rotor 15. The crushing rotor 15 is provided with a plurality of crushing bits 36 on the outer peripheral portion, and the rotation axis thereof is substantially parallel to the axis of the drive wheel 16 of the feed conveyor 12, that is, extends in the body width direction. Since the crushing rotor 15 is a rotating body, a predetermined gap is secured between the rotation locus surface of the outermost periphery and the anvil 29 that is a stationary body.

  Here, the crushing chamber 27 refers to a space that houses the crushing rotor 15 and crushes the material to be crushed. Specifically, there is an arcuate wall surface facing the front and lower surfaces of the crushing rotor 15, and the space around the crushing rotor 15 surrounded by the arcuate wall surface and the pressing roller device 14 and the feed conveyor 12. Defines the crushing chamber 27. A part of the arc-shaped wall surface is a screen 38, and the crushed material that is crushed until it becomes smaller than the eyes of the screen 38 passes through the screen 38 and is discharged from the crushing chamber 27.

  The pressing roller device 14 is rotated by a rotating shaft 22 extending in the body width direction above the front surface of the crushing rotor 15, a support member 23 swingable in the vertical direction about the rotating shaft 22, and the support member 23. A pressure roller 24 that is freely supported and faces the conveying surface near the drive wheel 16 of the feed conveyor 12, and a hydraulic cylinder (not shown) that swings the support member 23 of the pressure roller 24 are provided.

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

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

  Although the hydraulic cylinder is not shown, the rod side end portion of the hydraulic cylinder is connected to the left and right brackets 32 provided on the upper end side (rear end side) of the support member 23. This hydraulic cylinder forcibly rotates the pressing roller device 14 upward during maintenance or the like.

  The pressing roller 24 includes a hollow cylindrical roller main body 41 and a plurality of claw members 42 whose front end portions protrude radially outward from the outer peripheral surface of the roller main body 41. As shown in FIG. 4, the roller body 41 is set so that its axial dimension is approximately the same as or slightly larger than the width of the conveying surface of the feed conveyor 12, and the roller body 41 rotates. A driving device (not shown) to be driven is accommodated therein. With this driving device, the pressing roller 24 is rotationally driven in a direction synchronized with the conveyance speed of the object to be crushed by the feed conveyor 12 in the direction of rolling to the object to be crushed by the feed conveyor 12 (counterclockwise in FIG. 3). To do.

  5 is a rear view of the pressing roller 24 viewed from the same direction as FIG. 4, FIG. 6 is a side view taken along line VI-VI in FIG. 5, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 8 and 8 are sectional views taken along line VIII-VIII in FIG. FIG. 6 shows a state where a side cover (not shown) is removed.

  As shown in FIG. 5 to FIG. 8, the roller body 41 includes a plurality of recesses 43 on the outer peripheral surface. Specifically, the recess 43 includes a rectangular opening 44 opened on the outer peripheral surface of the roller body 41 and a bottomed cup 45, and the cup 45 is aligned with the opening 44 of the roller body 41. 45 is joined to the inner peripheral surface of the roller body 41 by an appropriate joining means such as welding. In the present embodiment, a plurality of such recesses 43 are provided at regular intervals in the axial direction on the outer peripheral surface of the roller body 41, and a row of the recesses 43 is provided on the entire circumference of the roller body 41. Moreover, the row | line | column of the recessed part 43 adjacent to the circumferential direction is shifted | deviated by a half pitch to the axial direction, and the recessed part 43 is staggered in the circumferential direction. Note that ring-shaped flanges 46 are joined to the outer peripheral portions at both ends in the axial direction of the roller body 41 by appropriate joining means such as welding. A side cover (not shown) is attached to the flange 46, and a rotary shaft and a driving device (both not shown) are attached via the cover.

  The claw member 42 is a means for suppressing slippage between the pressing roller 24 and the object to be crushed, and is used by the pressing roller 24 to grip and grasp the object to be crushed. As shown in FIG. 8, the claw member 42 includes a plate-like claw body 47 and a cylindrical base 48 when viewed from the circumferential direction of the roller body 41, and is formed in a shaft hole 49 provided in the base 48. By passing the pin 50 and attaching the pin 50 to the cup 45 by fastening means 51 (see FIG. 7 and the like) such as a nut, the pin 50 is rotatably attached to the cup 45. 7 and 8, the pin 50 extends along a line L (line L is parallel to the tangent to the roller body 41) perpendicular to the plane S1 passing through the rotation center line C of the roller body 41. Each of the members 42 has a configuration in which the tip portion can swing in the axial direction of the roller body 41 with the pin 50 as a fulcrum. The swinging range α of the claw member 42 is limited by the width W of the opening 44 of the roller body 41, but 45 on both sides in the axial direction of the roller body 41 around the surface S 2 orthogonal to the rotation center line C of the roller body 41. It is desirable to set it to a degree (90 degrees in total) or less.

  Further, as shown in FIG. 7, the claw member 42 has a triangular portion 52 on the distal end side (the radially outer side of the roller body 41) and a proximal end portion (on the rotation center line C side) when viewed from the axial direction. 53 is rectangular and formed in a pentagonal shape as a whole. The apex angle 54 of the distal end side portion 52 of the claw member 42 is on or in the vicinity of the surface S1, and the corner 55 of the boundary between the distal end side portion 52 and the proximal end side portion 53 is the outline (outer peripheral surface) of the roller body 41. Located at or near the top position. Accordingly, the distal end side portion 52 of the claw member 42 protrudes from the outer peripheral surface of the roller body 41 to the radially outer side of the roller body 41, and the proximal end portion 53 is accommodated in the recess 43.

  When the position of the claw body 47 along the surface S2 orthogonal to the rotation center line C of the pressing roller 24 is the neutral position of the claw member 42, the claw member 42 is positively moved to the neutral position in the configuration of FIG. Although a means for biasing is not particularly provided, the pressing roller 24 may further include a biasing means for biasing the claw member 42 to the neutral position. As a configuration for realizing this, for example, a configuration in which a coil spring 56 is provided between the inner wall surface of the recess 43 on both sides in the rotation direction of the claw body 47 as in another configuration example shown in FIG. . Of course, it goes without saying that the coil spring can be replaced with some elastic body, and for example, as shown in FIG. These elastic bodies may have a configuration in which both ends are fixed to both the claw member 42 and the wall surface of the concave portion 43, for example, but may be configured to be fixed only once to the wall surface of the claw member 42 or the concave portion 43. Further, even if the claw member 42 is not positively urged to the neutral position, in order to alleviate the collision between the claw member 42 and the wall surface of the recess 43, a material (such as a sponge) that can be a cushioning material is used instead of the elastic body. It can also be installed.

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

  When an object to be crushed is put into the hopper 11 by a heavy machine (hydraulic excavator or the like) equipped with an appropriate work tool such as a grapple, the object to be crushed is placed on the conveying belt 17 of the feed conveyor 12 and conveyed toward the crushing device 13. Is done. When the object to be crushed reaches the front side of the crushing device 13, for example, as shown in FIG. 3, the pressing roller 24 of the pressing roller device 14 rides on the object to be crushed, and the conveying surface of the feed conveyor 12 by the weight of the pressing roller 24. The object to be crushed X is pressed against the surface. The pressing roller 24 rotates in synchronization with the conveying speed of the feed conveyor 12, and the object X to be crushed is sandwiched between the conveying belt 17 and the pressing roller 24, and the crushing chamber 27 is cooperated with the feeding conveyor 12 and the pressing roller device 14. Is pushed into. The object to be crushed X fed into the crushing chamber 27 protrudes toward the crushing rotor 15 in a cantilever shape with a portion sandwiched between the pressing roller 24 and the conveyor belt 17 as a fulcrum. As indicated by the arrows in FIG. 3, the crushing rotor 15 rotates in the direction in which the crushing bit 36 collides with the object to be crushed X from below (clockwise in FIG. 3). 24.

  The object to be crushed X that is pushed toward the crushing rotor 15 is gradually crushed from the tip (primary crushing) by the crushing bit 36 of the crushing rotor 15 that collides at high speed from below while being pressed from above by the pressing roller 24. ) The fragments to be shredded in this way and spun up in the crushing chamber 27 collide with the anvil 29, and are further crushed (secondary crushing) by the impact force. Of the crushed pieces that have been secondarily crushed, those that are already small enough to pass through the screen 38 are discharged through the screen 38, and those that do not pass are circulated in the crushing chamber 27 as the crushing rotor 15 rotates. Then, it is further crushed (tertiary crushing) in response to the collision action, shearing action, crushing action, etc. with the anvil 29, the crushing bit 36, the inner wall surface of the crushing chamber 27 such as the screen 38, and the like. Of the crushed pieces that have been circulated, the crushed pieces that have undergone tertiary crushing and have been refined to a size that passes through the eyes of the screen 38 are sequentially passed through the screen 38 and discharged from the crushing device 13. The crushed material discharged from the crushing device 13 falls onto the discharge conveyor 3 through a chute (not shown), and is carried out of the machine by the discharge conveyor 3.

  Here, since many claw members 42 are provided on the outer peripheral surface of the pressing roller 24, slip between the pressing roller 24 and the object X to be crushed is difficult to occur. When a long object to be crushed X is fed into the crushing chamber 27 as shown in FIG. 3, as a tendency, crushing formed at the tip of the object to be crushed X as shown in FIG. The surface Y is formed in a circular arc shape in accordance with the locus surface of the outermost peripheral portion of the crushing rotor 15. In this case, if the crushing surface Y of the material to be crushed X is enlarged and the arc length Z of the crushing surface is extended while being coincident with the trajectory surface of the crushing rotor 15, the crushing bit 36 rubs the surface of the crushing surface Y. The primary crushing does not progress and the crushing efficiency is significantly reduced.

  On the other hand, in this embodiment, the claw member 42 of the pressing roller 24 is configured to be swingable in the axial direction of the pressing roller 24. The claw member 42 that presses the object to be crushed X may fall to either the left or right side due to the vibration, and the manner in which the crushing surface Y contacts the crushing rotor 15 may change. The way in which the crushing surface Y hits the crushing rotor 15 changes somewhat even if it does not change dramatically, so that the crushing surface Y and the crushing bit 36 are in contact with each other. The corners of the bit 36 come into contact with each other, the crushing contact force is increased (the crushing resistance is weakened), and the material to be crushed X starts to be efficiently crushed again. Since such an action can be appropriately repeated during the crushing operation, it can be expected to suppress a reduction in crushing efficiency accompanying the progress of the crushing operation. For example, while paying attention to the operation status of the crusher, the operator interrupts the operation of the heavy machinery whenever necessary and reversely operates the supply device (feed conveyor 12 and pressing roller device 14) to the crushing rotor 15 of the object X to be crushed. Since the number of scenes requiring manual operation such as changing the way of hitting can be reduced, work efficiency can be greatly improved.

  If the swing range α of the claw member 42 is greater than 90 degrees, the claw member 42 and the outer peripheral surface of the roller body 41 are viewed from the feed direction of the feed conveyor 12 (viewed from the direction shown in FIG. 4). The angle formed (angle β in FIG. 8 and FIG. 8) can be less than 45 degrees. In the state shown in FIG. 8 (angle β = 90 °), all the weight of the pressing roller 24 applied to the claw member 24 acts on the object X to be crushed. The force with which the claw member 24 grips the object X is maximized. On the other hand, when the claw member 24 is tilted to the left or right as illustrated by a two-dotted line in FIG. 8, when the pressing force is applied by the weight of the pressing roller 24, the amount of the pressing reaction force F applied to the claw member 24 is reduced. Forces f1 and f2 are generated. The component force f <b> 1 is a force acting in the extending direction of the claw member 24 and a force for gripping the object to be crushed X. The component force f <b> 2 is a force that acts in a direction perpendicular to the claw member 24 and is a force that attempts to tilt the claw member 24. When the angle β is less than 45 degrees, the component force f2 becomes larger than the component force f1, and the force to defeat the claw member 24 is superior to the force to grip the claw member 24. The original effect of the member 42 may be weakened. On the other hand, in this embodiment, by restricting the swing range α of the claw member 42 to 90 degrees or less, the angle β is always 45 degrees or more (45 ° ≦ β ≦ 135 °). The pressing force can be effectively applied as the gripping force of the object X to be crushed, and the gripping force can be reliably ensured while positively inducing the change of the hitting surface Y.

  Further, although not necessarily required for obtaining an essential effect, as shown in the configuration examples of FIG. 9 and FIG. 10, by further including a biasing means for biasing the claw member 42 to the neutral position, The claw member 42 can be easily bitten perpendicularly to the object X to be crushed. If the claw member 42 bites perpendicularly to the object X to be crushed, in addition to the gripping force working reliably, the width that the claw member 42 can swing after that can be secured to the maximum, and in either the left or right direction It becomes easy to swing evenly, and it becomes easy to effectively obtain the essential effect. Further, as described above, the urging means or the cushioning material installed in place of the urging means can be expected to reduce the collision between the claw member 42 and the wall surface of the recess 43, and damage to the claw member 42 and the roller main body 41 can be expected. The suppression effect can be expected.

  In the above, the case where the present invention is applied to a crusher capable of traveling on its own has been described as an example. However, the present invention is not limited thereto, and can be lifted and transported by a mobile crusher that can travel by towing, a crane, or the like. The present invention can also be applied to a portable crusher, and further to a stationary crusher arranged as a fixed machine in a plant or the like.

12 Feed conveyor 13 Crushing device 14 Pressing roller device 24 Pressing roller 42 Claw member 43 Recess 50 Pin 56 Coil spring (biasing means)
57 Rubber spring (biasing means)
C Rotation center line S2 Plane X orthogonal to rotation center line Object to be crushed α Swing range

Claims (4)

A crusher for crushing the material to be crushed;
A feed conveyor for conveying the object to be crushed toward the crushing device;
A pressure roller device that presses the object to be crushed on the feed conveyor with a pressure roller, and supplies the object to be crushed to the crushing device in cooperation with the feed conveyor;
The pressing roller includes a plurality of claw members whose outer end surfaces protrude from the pressing roller in the radial direction,
The crusher characterized in that tip ends of the plurality of claw members can swing in the axial direction of the pressing roller. The pressing roller includes a plurality of recesses provided on the outer peripheral surface,
The crusher according to claim 1, wherein each of the plurality of claw members is attached to the concave portion via a pin.   When the position along the plane orthogonal to the rotation center line of the pressing roller is the neutral position of the claw member, the pressing roller further includes a biasing unit that biases the claw member to the neutral position. The crusher of Claim 1 or 2 characterized by the above-mentioned.   The crusher according to any one of claims 1 to 3, wherein a swing range of the claw member is 90 degrees or less.

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