JP6921707B2 - Double rotary crusher - Google Patents

Description

The present invention relates to a double rotary crusher having a rotor to which a striking plate can be attached and detached.

This type of crusher is described in, for example, Patent Document 1. The impact type crusher of Patent Document 1 has a configuration in which a striking plate is detachably attached to a rotor installed on a lower frame so as to be rotatable forward and reverse. The upper frame is detachably fixed to the lower frame, and the rotor is surrounded by the upper frame. The upper frame has a fixed frame and a movable frame that are vertically divided.

In the impact type crusher of Patent Document 1, the joint surface of the fixed frame with the movable frame is displaced to the fixed frame side below and to the movable frame side above the vertical line passing through the center of the rotor. ing. The top plate of the fixed frame is provided with a supply port for the material to be crushed.

Below the supply port of the crushed material, pivots are provided on both side plates, and arms are attached to the respective pivots. At one end of each arm, a rail that connects both arms and projects outward from one side plate is attached.

In this configuration, in order to pull out the striking plate, the arm is rotated to bring the rail to the lowermost position with the movable frame open, and the striking plate is gripped by the gripping tool hanging from the hanging tool attached to the rail. Then, take the hanger along the rail to the outside of the side plate. When pushing the striking plate, the operation is the opposite.

Japanese Unexamined Patent Publication No. 60-99351

However, in the configuration of Patent Document 1, since the space for the rail to move with the rotation of the arm must be secured between the crushed material supply port and the rotor, the crushed material supply port is set at a high position. I had to place it. As a result, equipment such as a conveyor that sends the crushed material to the crushed material supply port becomes large and complicated, and there is room for improvement in this respect.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a double-rotation type crusher which can realize miniaturization in the height direction and can easily attach / detach a striking plate. be.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem and its effect will be described.

According to the first aspect of the present invention, a double rotary crusher having the following configuration is provided. That is, this double-rotation type crusher includes a rotor and a casing. The striking plate can be attached to and detached from the rotor. The casing accommodates the rotor, and a supply port to which the object to be crushed is supplied is formed at a position above the rotor. The casing comprises cover walls arranged in pairs so as to sandwich the rotor in the direction of the rotation axis of the rotor. An opening is formed in at least one of the cover walls directly above the rotation axis.

Thereby, when attaching / detaching the striking plate to the rotor, the striking plate can be put into the inside of the casing or taken out through the opening formed directly above the rotation axis. Therefore, it is easy to insert the striking plate downward from directly above the rotor to attach it to the rotor, or to remove it by pulling it upward from the rotor. Further, by appropriately determining the size of the opening in the vertical direction, the space required for moving the striking plate between the rotor and the supply port can be made compact particularly in the height direction. Therefore, it is easy to reduce the height of the supply port, and it is possible to realize miniaturization and simplification of the configuration.

According to the second aspect of the present invention, the following striking plate mounting method for mounting the striking plate on the rotor of the double-rotation type crusher is provided. That is, this double-rotation type crusher includes a casing for accommodating the rotor. In the casing, a supply port to which the object to be crushed is supplied is formed at a position above the rotor. The casing comprises cover walls arranged in pairs so as to sandwich the rotor in the direction of the rotation axis of the rotor. An opening is formed in at least one of the cover walls directly above the rotation axis. This striking plate mounting method includes a transfer step and a insertion step. In the transfer step, in a state where the striking plate is suspended from a movable arm provided in the striking plate transport device, the movable arm is placed on the top of the rotor through the opening from a position where the movable arm does not overlap with the rotor in a plan view. The striking plate is conveyed by moving the movable arm so as to insert it into the space directly above. In the insertion step, the striking plate suspended from the movable arm is lowered to insert the striking plate downward with respect to the rotor.

As a result, the striking plate can be moved while being suspended by the striking plate transport device, and can be inserted and attached downward to the rotor, so that workability can be greatly improved and labor can be reduced. In addition, the striking plate can be moved for mounting in a compact space in the height direction between the rotor and the supply port.

According to the present invention, it is possible to provide a double-rotation type crusher which can be miniaturized in the height direction and whose striking plate can be easily attached / detached.

The figure which shows the overall structure of the crusher which concerns on one Embodiment of this invention. Sectional view of the crusher cut in a plane perpendicular to the rotor axis. Top view illustrating the range in which the tip of the jib crane moves. The perspective view which shows the exchange work of the striking plate using a jib crane. A perspective view conceptually showing the work of inserting and attaching a striking plate to a rotor from above using a jib crane. The figure which shows the deformation example which made the striking plate exchangeable by a bridge crane.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a crusher 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the crusher 1 cut in a plane perpendicular to the axis of the rotor.

The crusher 1 shown in FIG. 1 is a machine that crushes a raw material (object to be crushed) 70 such as rock by applying a blow, an impact, or the like. The crusher 1 mainly includes a rotor 5, a casing 20, a front collision plate 37, a rear collision plate 38, and a jib crane (striking plate transfer device) 50.

The rotor 5 crushes the raw material 70 by rotating with a plurality of striking plates 2 attached. The rotor 5 is fixed to a transmission shaft 9 which is arranged so as to coincide with its axis and is rotatably supported. Therefore, the transmission shaft 9 functions as a rotation shaft of the rotor 5, and the rotation axis 5c of the rotor 5 coincides with the rotation center of the transmission shaft 9. In the following description, the rotation axis 5c of the rotor 5 may be simply referred to as a rotation axis.

As shown in FIG. 2, the casing 20 is formed in a hollow shape, and a rotor 5, a striking plate 2, a front collision plate 37, and a rear collision plate 38 are housed therein. The transmission shaft 9 that supports the rotor 5 is horizontally arranged so as to penetrate the internal space of the casing 20.

As shown in FIG. 3, a pulley 12 is fixed to one end of the transmission shaft 9 on one side in the longitudinal direction. The rotation of the motor (not shown), which is the drive source of the rotor 5, is transmitted to the pulley 12 via the transmission belt.

The casing 20 shown in FIG. 1 is formed so as to cover at least the upper half of the outer peripheral surface of the rotor 5 and the end faces on both sides of the rotor 5 in the axial direction.

A supply port 28, which is an opening for charging the raw material 70 from above, is formed in the center of the upper surface of the casing 20. A discharge port 29, which is an opening for discharging the crushed material 71, which is a crushed raw material, is formed on the bottom surface of the casing 20. Inside the casing 20, a path for the raw material 70 from the supply port 28 to the discharge port 29 is formed. The casing 20 is provided with a hinge mechanism so that a part of the casing 20 can be opened for maintenance work or the like.

Specifically, the casing 20 includes a lower casing 21, an intermediate casing 22, and an upper casing 23.

The lower casing 21 is a member that serves as a base for the casing 20, and is formed in a square tubular shape. A discharge port 29 is formed at the lower end of the lower casing 21.

The intermediate casing 22 is formed in a gate shape so as to cover directly above the rotor 5, and is connected to the lower casing 21. A supply port 28 is formed in a portion above the intermediate casing 22 and located directly above the rotor 5.

The upper casing 23 is arranged in pairs with the intermediate casing 22 interposed therebetween, and each is rotatably supported by a hinge 24 with respect to the lower casing 21.

The lower casing 21 and the respective upper casings 23 are connected by a telescopic cylinder (specifically, a hydraulic cylinder) 25. By driving the cylinder 25 in the extending direction, the upper casing 23 connected to the cylinder 25 can be opened to form a space for maintenance. In FIG. 1, a state in which the upper casing 23 on one side is opened is shown by a chain line.

As shown in FIG. 2, the front collision plates 37 are provided in pairs so as to sandwich a space between the rotor 5 and the supply port 28 arranged directly above the rotor 5, and the pair of upper casings 23 are provided. It is arranged in each. The front collision plate 37 gives an impact force to the raw material 70 when the raw material 70 blown by the impact of the striking plate 2 collides with the raw material 70, and causes the raw material 70 to be crushed more effectively.

The rear collision plates 38 are provided in pairs so as to sandwich the rotor 5 at a position below the front collision plates 37, and are arranged in a pair of upper casings 23, respectively. When the tip of the striking plate 2 rotating at high speed passes near the rear collision plate 38, the raw material 70 is finely crushed to a size that allows it to pass through the gap between the striking plate 2 and the rear collision plate 38.

Since the crusher 1 of the present embodiment is configured as a reversible rotary crusher, it can be operated by either forward rotation operation in which the rotor 5 is rotated in the direction indicated by the arrow in FIG. 2 or reverse rotation operation in which the rotor 5 is rotated in the opposite direction. , Raw material 70 can be crushed. Based on the property that the front side of the striking plate 2 in the traveling direction is more likely to wear than the tail side, the life of the striking plate 2 is substantially shortened by switching between the operation in the forward rotation and the operation in the reverse rotation at an appropriate timing. Can be extended. The crusher 1 is configured to be symmetrical with respect to the vertical plane including the rotation axis 5c so that the same crushing performance can be obtained regardless of which direction the rotor 5 is rotated. Therefore, the supply port 28 is arranged directly above the transmission shaft 9 (rotational axis 5c).

As shown in FIG. 2 and the like, a plurality of striking plates 2 (four in the present embodiment) are attached radially around the rotation axis 5c at equal intervals in the circumferential direction on the outer periphery of the rotor 5. Each striking plate 2 is fixed to the rotor 5 in a state in which a part thereof protrudes toward the outer periphery, and the protruding portion is configured to hit the raw material 70.

Since the striking plate 2 is detachably fixed to the rotor 5, for example, when the striking plate 2 is worn, it can be removed and replaced. The details of the configuration in which the striking plate 2 can be attached to and detached from the rotor 5 will be described later.

As shown in FIG. 3, the crusher 1 includes a pair of bearing boxes 31 arranged so as to sandwich the rotor 5 in the direction of the rotation axis 5c. The bearing boxes 31 are all arranged outside the casing 20. A bearing (not shown) is housed inside each bearing box 31, and the bearing rotatably supports a transmission shaft 9 arranged so as to penetrate the casing 20.

Next, the jib crane 50 included in the crusher 1 will be described with reference to FIG. 1 and the like. FIG. 4 is a perspective view showing a replacement operation of the striking plate 2 using the jib crane 50.

The jib crane 50 is configured as an articulated jib crane having two joints, and includes a mast 51, an intermediate arm 56, and a hanging arm (jib) 57, as shown in FIG.

The mast 51 is provided vertically at a position close to the casing 20 on one side of the rotation axis 5c. As shown in FIG. 4, the two lower parts of the mast 51 are fixed to the lower casing 21 included in the casing 20 by the connecting members 47 and 48, respectively. One end of the intermediate arm 56 is connected to the upper end of the mast 51.

As shown in FIG. 1 and the like, the intermediate arm 56 is configured as a linearly elongated rod-shaped arm. The longitudinal direction of the intermediate arm 56 is oriented substantially horizontally. One end of the intermediate arm 56 is rotatably supported by the upper end of the mast 51 via a vertically oriented first support shaft 53. Therefore, the intermediate arm 56 can rotate in the horizontal plane about the first support shaft 53. In the intermediate arm 56, a midway portion of the hanging arm 57 in the longitudinal direction is connected to an end portion on the side opposite to the side connected to the mast 51.

The hanging arm 57 is configured as a linearly elongated rod-shaped arm. The longitudinal direction of the hanging arm 57 is oriented substantially horizontally. The longitudinal intermediate portion of the hanging arm 57 is rotatably supported by the end of the intermediate arm 56 via a second support shaft 54 oriented in the vertical direction. Therefore, the suspension arm 57 can rotate in the horizontal plane about the second support shaft 54. A chain (hanging member) 58 to which a suspended load can be attached is hung from one end of the hanging arm 57 on one side in the longitudinal direction. An electric hoisting device 59 capable of hoisting the chain 58 is attached to the end of the hanging arm 57 on the side opposite to the suspended load side.

Of the two side walls (cover walls) 30 included in the intermediate casing 22, the side wall 30 on the side closer to the jib crane 50 is formed with an elongated exchange opening (opening) 27 in the vertical direction so as to penetrate. The exchange opening 27 is located directly above the rotation axis 5c and is formed so as to penetrate the side wall 30 in a direction parallel to the rotation axis 5c.

The exchange opening 27 is formed in an elongated rectangular shape in the vertical direction. The height of the lower end of the replacement opening 27 is higher than the height of the rotation axis 5c, and is lower than the height of the upper end of the rotation locus of the striking plate 2 attached to the rotor 5. The height of the upper end of the replacement opening 27 is higher than the upper end of the rotation locus of the striking plate 2 attached to the rotor 5, and is lower than the height of the supply port 28. When viewed in a direction parallel to the rotation axis 5c, the vertical dimension of the replacement opening 27 is larger than the vertical dimension of the striking plate 2 when the striking plate 2 is suspended as described later. There is. Further, the lateral dimension of the replacement opening 27 is larger than the thickness of the striking plate 2.

A lid (closing member) 26 that covers the exchange opening 27 is attached to the side wall 30 of the intermediate casing 22 in which the exchange opening 27 is formed. The lid 26 is rotatably supported with respect to the side wall 30, and by rotating the lid 26, the lid 26 can be opened so that the inside of the casing 20 can be accessed through the replacement opening 27.

The hanging arm 57 of the jib crane 50 is arranged at a height that allows it to be inserted into the upper part of the replacement opening 27. Therefore, the jib crane 50 inserts the tip of the hanging arm 57 into the inside of the casing 20 (above the rotor 5) through the exchange opening 27 with the lid 26 open, as shown by the chain line in FIG. 3 or FIG. be able to.

FIG. 3 is a plan view showing an example of the movement locus of the jib crane 50 in relation to the positions of the casing 20 and the rotor 5. As shown in FIG. 3, in the jib crane 50, the intermediate arm 56 and the suspension arm 57 rotate independently so that the suspension arm 57 is placed in the space directly above the top of the rotor 5 (via the replacement opening 27). It can be moved between the first position P1 in which a part is inserted and the second position P2 which does not overlap with the rotor 5 in a plan view.

The hanging arm 57 can be oriented substantially perpendicular to the rotation axis 5c in a plan view when the suspension arm 57 is not inserted into the casing 20 through the replacement opening 27. As a result, when the jib crane 50 is not used, the entire suspension arm 57 can be brought close to the casing 20, and a compact configuration can be realized.

The suspension arm 57 can be moved by the operator pushing or pulling the intermediate arm 56 and the suspension arm 57 by hand.

Next, an example of a configuration for attaching the striking plate 2 to the rotor 5 will be described with reference to FIG. FIG. 5 is a perspective view conceptually showing the work of inserting and attaching the striking plate 2 to the rotor 5 from above.

As shown in FIG. 5, the rotor 5 includes four rotating disks (rotating plates) 32 arranged side by side at equal intervals in the axial direction.

Each rotating disc 32 is formed with an accommodating recess 33 capable of accommodating a part of the striking plate 2. A plurality (four in this embodiment) of the accommodating recesses 33 are formed at equal intervals in the circumferential direction of the rotating disk 32. The shapes of the four accommodating recesses 33 are the same as each other.

In each of the accommodating recesses 33, the rotating disk 32 is formed with a pair of tapered guide surfaces 34 that narrow as they move away from the rotating axis 5c. Tightening members 4, which will be described later, can be arranged on the tapered guide surface 34.

The number of tightening members 4 is arranged in a number corresponding to the tapered guide surfaces 34 formed on the rotating disk 32. The tightening members 4 are arranged in a pair with respect to one accommodating recess 33, and the striking plate 2 can be sandwiched and held between the pair of tightening members 4. The tightening member 4 is formed with a tapered surface 41 corresponding to the tapered guide surface 34 on the rotating disk 32 side. Further, the tightening member 4 is formed with a groove portion 42 in which the protrusion of the hooking portion 11 formed on the striking plate 2 can be hooked.

As shown in FIG. 5, the striking plate 2 is configured as a substantially rectangular plate and has a length capable of straddling two rotating discs 32. Two striking plates 2 are arranged side by side in the axial direction of the rotor 5. Of the four rotating discs 32 arranged side by side in the axial direction of the rotor 5, one striking plate 2 is fixed to two on one side, and one striking plate 2 is fixed to two on the other side. ..

A plurality (two) hooking portions 11 are formed side by side on both sides of the striking plate 2 in the thickness direction, and the spacing between the hooking portions 11 corresponds to the spacing between the rotating disks 32. ing. Each hook portion 11 is configured to include two protrusions protruding in the thickness direction, and each protrusion is formed in an elongated direction parallel to the length direction of the striking plate 2.

In order to attach the striking plate 2 to the rotor 5 with the above configuration, first, the lid 26 formed on the intermediate casing 22 is opened to expose the replacement opening 27. Next, the rotation phase of the rotor 5 is adjusted so that the open side of the accommodating recess 33 to which the striking plate 2 is attached faces directly upward, and a rotation stop mechanism (not shown) is operated. In advance, the tightening member 4 is temporarily removed from the two accommodating recesses 33 to which the striking plate 2 is attached. As a result, a space for inserting the striking plate 2 can be formed in the accommodating recess 33.

Next, the striking plate 2 is attached to the chain suspended from the tip of the hanging arm 57 included in the jig crane 50 so that the length direction of the striking plate 2 coincides with the rotation axis 5c and the jib crane 50 is in a standing posture. Attach via a tool. After that, the hoisting device 59 included in the jib crane 50 is driven to raise the striking plate 2 to near the tip of the hanging arm 57.

In this state, the tip of the hanging arm 57 is moved in a horizontal direction to be inserted into the inside of the casing 20 (directly above the rotor 5) through the replacement opening 27 together with the striking plate 2. After that, the hoisting device 59 is driven to lower the striking plate 2, and the striking plate 2 is inserted downward into the accommodating recess 33.

Then, the pair of tightening members 4 are inserted between the tapered guide surface 34 of the rotating disc 32 and the hooking portion 11 of the striking plate 2 by sliding in a direction parallel to the rotating axis 5c. FIG. 5 shows the work of inserting the tightening member 4 for the accommodating recess 33 of one rotating disc 32, but this work is also performed for the other rotating disc 32. Since the tightening member 4 is inserted at a position close to the rotation axis 5c, a space for inserting the tightening member 4 is secured between the taper guide surface 34 and the striking plate 2.

One striking plate 2 is attached to two of the four accommodating recesses 33 arranged in the direction of the rotation axis 5c, and then another striking plate 2 is attached to the remaining two accommodating recesses 33. When the striking plate 2 is attached to all the accommodating recesses 33, the above operation is repeated while rotating the rotor 5 by 90 °.

Then, with the hanging arm 57 of the jib crane 50 pulled out from the casing 20, the replacement opening 27 is closed by the lid 26. Subsequently, when the rotor 5 is rotated for operation, the striking plate 2 on which the centrifugal force acts moves to the outer peripheral side together with the tightening member 4, so that the tightening member 4 and the rotating disk 32 are tapered. Is generated, and the striking plate 2 is firmly fixed to the rotor 5.

Regarding the work of removing the striking plate 2 from the rotor 5, first, the lid 26 is opened to expose the replacement opening 27. Next, the rotation phase of the rotor 5 is adjusted so that the striking plate 2 to be removed faces directly upward, and the rotation is stopped. After that, the impact is applied to the striking plate 2 from the outer side (upper side) in the radial direction to release the taper engagement between the tightening member 4 and the rotating disc 32.

After that, the tip of the hanging arm 57 provided in the jib crane 50 is inserted into the replacement opening 27, and the striking plate 2 is attached to the chain suspended at the tip of the suspension arm 57 via an appropriate jig. Next, the tightening member 4 is pulled out from between the tapered guide surface 34 of the rotating disc 32 and the hooking portion 11 of the striking plate 2 by sliding in a direction parallel to the rotating axis 5c. Subsequently, the hoisting device 59 included in the jib crane 50 is driven to raise the striking plate 2 to near the tip of the hanging arm 57.

After that, the tip of the hanging arm 57 of the jib crane 50 is moved in a horizontal direction to be pulled out of the casing 20 together with the striking plate 2 through the replacement opening 27. After that, the hoisting device 59 is driven to lower the striking plate 2, and the striking plate 2 is removed from the chain.

After removing one striking plate 2, the striking plate 2 adjacent to the striking plate 2 in the direction of the rotation axis 5c is also removed in the same manner. When removing all the striking plates 2 from the rotor 5, the above operation is repeated while rotating the rotor 5 by 90 °.

As described above, in the present embodiment, the striking plate 2 can be attached to or detached from the rotor 5 in a state where the striking plate 2 is lifted by using the chain 58.

The striking plate 2 has a symmetrical shape as shown in FIG. 2 and the like. After using a new striking plate 2 mounted on the rotor 5, the worn striking plate 2 is removed and the orientation is reversed. It is configured so that it can be reattached to the rotor 5. Thereby, the life of the striking plate 2 can be effectively extended. The attachment / detachment of the striking plate 2 described above can also be used when the direction in which the striking plate 2 is attached to the rotor 5 is reversed.

When all of the radially outwardly protruding portions of the striking plates 2 arranged radially are worn to the same extent, the striking plates 2 located at the top of the rotor 5 are inverted and worn as described above. Consider the case where the direction is changed so that the non-existing part protrudes outward (upward) in the radial direction. Along with this, the center of gravity of the rotor 5 including the striking plate 2 moves above the rotation axis 5c. Therefore, if the rotation stop of the rotor 5 is released, the striking plate 2 whose orientation has been changed will be on the bottom. The rotor 5 rotates naturally so that the striking plate 2 (in other words, the striking plate 2 whose direction has not been reversed yet) on the opposite side of the striking plate 2 and the rotation axis 5c is on the upper side. Therefore, the configuration in which the target striking plate 2 is attached / detached with the target striking plate 2 facing directly upward as in the present embodiment is a rotor in which all the striking plates 2 mounted on the rotor 5 are reversed. It is advantageous in that the work of adjusting the rotation phase of 5 is simplified. It should be noted that this effect is similarly exhibited not only when the striking plate 2 is inverted but also when the worn striking plate 2 is replaced with a new one.

As described above, the crusher 1 of the present embodiment is configured to be a double-rotation type, and includes a rotor 5 and a casing 20. The striking plate 2 can be attached to and detached from the rotor 5. The casing 20 accommodates the rotor 5, and a supply port 28 to which the raw material 70 is supplied is formed at a position above the rotor 5. The intermediate casing 22 included in the casing 20 includes side walls 30 arranged in pairs so as to sandwich the rotor 5 in the direction of the rotation axis 5c of the rotor 5. On one side wall 30, a replacement opening 27 for inserting the hanging arm 57 is formed directly above the rotation axis 5c.

As a result, when the striking plate 2 is attached / detached to the rotor 5, the striking plate 2 can be put into the casing 20 or taken out through the replacement opening 27 formed directly above the rotation axis 5c. can. Therefore, it becomes easy to insert the striking plate 2 downward from directly above the rotor 5 and attach it to the rotor 5, or to remove it by pulling it upward from the rotor 5. Further, by appropriately determining the vertical size of the replacement opening 27, the space required for the movement of the striking plate 2 between the rotor 5 and the supply port 28 can be made compact especially in the height direction. be able to. Therefore, it is easy to reduce the height of the supply port 28, and it is possible to realize miniaturization and simplification of the configuration.

Further, the crusher 1 of the present embodiment includes a jib crane 50 having a hanging arm 57 capable of suspending the striking plate 2. The hanging arm 57 can move between the first position P1 inserted into the space directly above the top of the rotor 5 through the replacement opening 27 and the second position P2 which does not overlap with the rotor 5 in a plan view. It is configured in.

As a result, the striking plate 2 can be moved for attachment / detachment while being suspended by the jib crane 50, so that workability can be greatly improved and labor can be reduced.

Further, in the crusher 1 of the present embodiment, the hanging arm 57 is rotatable.

Thereby, a simple configuration of the jib crane 50 can be realized.

Further, in the crusher 1 of the present embodiment, the striking plate 2 is conveyed by the jib crane 50 provided with the jib as the hanging arm 57.

As a result, it is possible to easily realize the miniaturization of the entire crusher 1 including the configuration for transporting the striking plate 2.

Further, in the crusher 1 of the present embodiment, the jib crane 50 is configured as an articulated jib crane 50 having two joints.

As a result, the degree of freedom of the movement path of the striking plate 2 can be increased while preventing the configuration of the jib crane 50 from becoming complicated, so that the work can be performed flexibly according to the situation.

Further, in the crusher 1 of the present embodiment, the jib crane 50 includes a mast 51 that supports the hanging arm 57. The mast 51 is fixed to the casing 20 via connecting members 47 and 48.

As a result, the mast 51 of the jib crane 50 can be mechanically coupled to the casing 20, so that the strength as a whole can be increased.

Further, in the crusher 1 of the present embodiment, the striking plate 2 is attached to the rotor 5 as follows. That is, in a state where the striking plate 2 is suspended from the suspension arm 57 provided in the jib crane 50, the suspension arm 57 does not overlap with the rotor 5 in a plan view, and the top of the rotor 5 is true through the replacement opening 27. The striking plate 2 is conveyed by moving the hanging arm 57 so as to be inserted into the upper space (transportation step). Next, by lowering the striking plate 2 suspended from the hanging arm 57, the striking plate 2 is inserted downward into the rotor 5 (insertion step).

As a result, the striking plate 2 can be moved while being suspended by the jib crane 50, and can be inserted and attached downward to the rotor 5, so that workability can be greatly improved and labor can be reduced. Further, the striking plate 2 can be moved for mounting in a compact space in the height direction between the rotor 5 and the supply port 28.

Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

The lid 26 may be configured to open the replacement opening 27 by, for example, sliding or removing it, instead of opening the replacement opening 27 by rotating.

The replacement opening 27 may be formed in both of the pair of side walls 30 provided in the casing 20 instead of being formed in only one of them. In this case, the jib cranes 50 may be provided as a pair.

The tip of the hanging arm 57 included in the jib crane 50 does not necessarily have to be inserted into the casing 20 through the replacement opening 27. For example, with the upper casing 23 wide open as shown by the chain line in FIG. 1, the hanging arm 57 is diagonally inserted from the formed open portion, and the tip thereof is positioned directly above the top of the rotor 5. Can be considered.

An electric motor may be attached to the joint portions (first support shaft 53 and second support shaft 54) of the jib crane 50 so that the suspension arm 57 is automatically moved.

The jib crane 50 may be configured such that the striking plate 2 is suspended by, for example, a wire instead of the chain 58.

The jib crane 50 may be modified to have one or more joints instead of the two-joint configuration. Further, instead of the configuration in which the hanging arm 57 is swiveled, for example, the jib may be slid in a direction parallel to the rotation axis 5c so as to be inserted into the casing 20 through the replacement opening 27 or the like. can.

Instead of the jib crane 50, for example, a bridge crane 60 as shown in FIG. 6 can be used as a striking plate transport device. The bridge crane 60 includes a plurality of masts 61 (two in the example of FIG. 6) and a slide arm (movable arm) 62. The two masts 61 are provided so as to stand vertically. The slide arm 62 is formed in an elongated straight line, and is horizontally bridged between the upper ends of the two masts 61. The longitudinal direction of the slide arm 62 is oriented so as to be parallel to the rotation axis 5c. The slide arm 62 has an I-shaped cross section, and the upper portion thereof is supported by a guide roller 63 rotatably attached to the upper end portion of each mast 61.

Therefore, the slide arm 62 slides in the longitudinal direction thereof, so that the slide arm 62 does not overlap with the rotor 5 in a plan view with the first position P1 inserted into the space directly above the top of the rotor 5 through the replacement opening 27. It can be moved between the two positions P2 as indicated by the white arrow.

In the bridge crane 60, an electric hoisting device 65 capable of hoisting the chain 64 is suspended below the slide arm 62 via a guide roller 66. Therefore, the hoisting device 65 can move along the longitudinal direction of the slide arm 62 as shown by the thick arrow while the striking plate 2 is suspended.

Like the jib crane 50, the bridge crane 60 inserts the striking plate 2 into the casing 20 and conveys the striking plate 2 directly above the rotor 5 through the replacement opening 27, or the striking plate 2 directly above the rotor 5. It can be pulled out to the outside of the casing 20.

The configuration of the striking plate 2 is not limited to the configuration shown in FIG. 5 and the like, and can be appropriately changed depending on the circumstances. In particular, the present invention can be applied not only to a configuration in which the direction in which the striking plate 2 is attached to the rotor 5 is reversible, but also to a configuration in which the striking plate 2 is not reversible.

In the above embodiment, four striking plates 2 are arranged side by side in the circumferential direction on the rotor 5, but for example, three may be arranged, or five or more may be arranged.

The number of rotating discs 32 may be 3 or less or 5 or more instead of 4 as shown in FIG.

1 Crusher 2 Strike plate 5 Rotor 5c Rotating axis 20 Casing 27 Replacement opening (opening)
30 Side wall (cover wall)
50 Jib crane (striking plate transfer device)
57 Suspended arm (jib, movable arm)

Claims (7)

A rotor with a removable striking plate and
A casing in which the rotor is housed and the supply port to which the object to be crushed is supplied is formed at a position above the rotor.
With
The casing comprises cover walls arranged in pairs so as to sandwich the rotor in the direction of the rotation axis of the rotor.
A double-rotation crusher characterized in that an opening is formed in at least one of the cover walls directly above the rotation axis. The double-rotation type crusher according to claim 1.
A striking plate transport device having a movable arm capable of suspending the striking plate is provided.
The movable arm is configured to be movable between a first position inserted into a space directly above the top of the rotor through the opening and a second position that does not overlap the rotor in a plan view. A double-rotation type crusher characterized by being. The double-rotation type crusher according to claim 2.
The movable arm is a double-rotation type crusher characterized in that it can be swiveled. The double-rotation type crusher according to claim 2 or 3.
The striking plate transport device is a double-rotation type crusher characterized by being a jib crane including a jib as the movable arm. The double-rotation type crusher according to claim 4.
The jib crane is a double-rotation type crusher characterized in that it is configured as an articulated jib crane. The double-rotation type crusher according to claim 4 or 5.
The jib crane includes a mast that supports the movable arm.
A double-rotation type crusher characterized in that the mast is fixed to the casing. Equipped with a casing to house the rotor
In the casing, a supply port to which the object to be crushed is supplied is formed at a position above the rotor.
The casing comprises cover walls arranged in pairs so as to sandwich the rotor in the direction of the rotation axis of the rotor.
A striking plate mounting method for mounting a striking plate to the rotor of a double-rotation type crusher having an opening formed in at least one of the cover walls directly above the rotating axis.
With the striking plate suspended from the movable arm provided in the striking plate transport device, from a position where the movable arm does not overlap with the rotor in a plan view, through the opening, into a space directly above the top of the rotor. By moving the movable arm so as to be inserted, the transfer process of transporting the striking plate and the transfer process.
The insertion step of inserting the striking plate downward with respect to the rotor by lowering the striking plate suspended from the movable arm.
A striking plate mounting method characterized by including.

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