JP2001276637A - Vertical mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the downsizing of a vertical mill and more particularly the downsizing of a lifting means of a turntable and the correction of the uneven wear of a roller tire. SOLUTION: The vertical mill is constituted by liftably supporting the table 8 by a hydraulic cylinder 10, installing a casing 11 of this hydraulic cylinder 10 and a motor M for rotation of the table 8 respectively to the ground G, integrating a piston 12 and a table revolving shaft 8a and connecting this revolving shaft 8a to the revolving shaft 20 of the motor M by an Oldham's coupling 21. The mill is downsized by absorbing the lifting of the table 8 by this joint. The joint part of an upper frame 3 and a lower frame 2 is provided with a correction means consisting of a hydraulic jack 71 and a frame rotating means. The correction of the uneven wear is facilitated by rotationally transferring and moving the roller tire 9 to the position of the upper frame 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical mill in which a rotary table moves up and down.

[0002]

2. Description of the Related Art A vertical mill will be described with reference to FIGS. 1 and 11 showing an embodiment of the present invention. A table 8 is rotatably provided in a mill casing (upper and lower frames 2, 3). Roller tire 9 approaches table 8
Between the table 8 and the roller tire 9 crushed objects a, a '
For crushing or crushing.

[0003] In the pulverization by the vertical mill, if the supply amount of the crushed material a 'fluctuates, the rolling force of the roller tire 9 and the roller tire 9 and the table are adjusted in order to set the particle size of the crushed material b' in an appropriate range. 8 it is necessary to adjust the gap [delta] ₁ of. This adjustment is performed by adjusting the pressing force of the roller tire 9 or moving the table 8 up and down. At this time, in the type in which the roller tire 9 is pressed by the pressing spring 45, the pressing force of the roller tire 9 is determined by the spring pressure, and therefore, it is difficult to adjust the rolling force or the like. It corresponds by raising and lowering.

As a vertical mill capable of moving the table 8 up and down, Japanese Patent Laid-Open Publication Nos.
No. 276726 can be mentioned. The technology described in the former publication is such that a table 8 and an elevator equipped with a drive motor thereof can be moved up and down by a screw-driven pantogram type elevator, and the technology described in the latter publication uses various types of elevators. The elevator can be moved up and down.

[0005] In addition, crushing, for example, sand making, is performed by this vertical mill.
No. 945 is disclosed. This publication technique, to adjust the rolling force and the gap [delta] ₁ by adjusting the pressing force of the roller tire 9 by a compression spring and adjusting bolt.

[0006]

According to the techniques described in the two publications related to the above-mentioned pulverization, since the table 8, the motor, and the reduction gear are mounted on the elevating table, their weight becomes heavy, and the large Since the elevating means is required and the elevating platform is not fixed to the ground G, the elevating platform vibrates largely due to the crushing action, hinders a smooth crushing action, and generates noise. Further, it is necessary to provide a means for resisting the rotational force of the table 8 on the elevating table, and the means for elevating the table becomes complicated.

Further, in the crushing of sand and the like, it is preferable to adjust the rolling force by raising and lowering the table 8.
At this time, it is preferable that the same problem as in pulverization does not occur.

The means for adjusting the gap δ ₁ by swinging the roller tire 9 in the vertical direction must adjust the gap δ ₁ for each roller tire 9, and the operation is complicated. Adjustment control is not easy either. Further, when the pressing means of the roller tire 9 protrudes from the mill casing, the size of the mill itself is increased, and the pressing means is generally expensive (see Japanese Utility Model Publication No. 3-17945).

In the conventional vertical mill disclosed in each of the above-mentioned publications, the table 8 and the frame accommodating the roller tire 9 can separate the portion where the roller tire 9 is attached from the frame portion below the table 8. Is configured. When the roller tire 9 is unevenly worn by such a vertical mill, it is necessary to move the upper frame including the roller tire 9 to correct the roller tire 9 when correcting the roller tire 9. Are heavy, and the work of moving them from the lower frame is extremely difficult without any correction means.

The present invention solves the above-mentioned problems, reduces the size of the table elevating means, suppresses the unbalanced load during rotation of the table, reduces vibration, and facilitates the correction work of the roller tire. The task is to provide.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a table rotating means and an elevating means which are respectively installed on the ground, and the rotating means moves up and down the rotating shaft of the table from the rotating means. By absorbing and transmitting the rotational force, the frame containing the table and the roller tires is divided into upper and lower parts, and a means for correcting uneven wear of the roller tires mounted on the upper frame is provided at the frame division position.

As described above, if the lifting means is separated from the rotating means, the lifting means does not need to raise and lower the rotating means, and can be downsized accordingly. In such a vertical mill, the correction of the roller tire is facilitated by providing the means for correcting the uneven wear of the roller tire on the frame.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention relates to a vertical mill for crushing, in which a crushed object is fed between a rotating table and a roller tire adjacent to the table to crush and crush. In the mill, the table is supported by a hydraulic cylinder or the like so as to be able to move up and down, and its raising and lowering means and a rotating means such as a motor of the table are installed on the ground, respectively, and the rotating means moves up and down the rotating shaft of the table from the rotating means The table and the frame containing the roller tires are divided into upper and lower parts, and a correction means for uneven wear of the roller tires attached to the upper frame is provided at the frame division position. Can be adopted.

As a specific means for absorbing the elevation of the rotary shaft, a configuration in which a pulley which is movable in the axial direction of the rotary shaft of the table and which is integral with the rotary shaft in the rotational direction may be employed. In this configuration, the pulley is rotated by the rotating means, and the rotational force can be transmitted to the rotary shaft by absorbing the elevation of the rotary shaft by moving the pulley in the axial direction with respect to the rotary shaft.

Further, as another specific means, a configuration in which a spur gear is fitted on the rotating shaft of the table and a pinion rotated by the rotating means is engaged with the spur gear may be employed. In this configuration, the vertical movement of the rotating shaft is absorbed by the latitude of the toothed direction of the spur gear meshing with the spur gear,
The rotation force is transmitted to the rotation shaft.

Further, as another specific means, a hydraulic cylinder serving as the elevating means is rotatably provided on the ground around its axis, and a piston rod of the hydraulic cylinder is used as a rotation axis of the table and its piston It is possible to adopt a configuration in which the rod is not rotatable with respect to the cylinder casing, and the cylinder casing is rotatable by the rotating means. In this configuration, the vertical movement is absorbed by the space between the cylinder casing and the piston rod.

In any of the vertical mills of pulverization and crushing, as another specific means of the absorbing means, a casing of a hydraulic cylinder serving as the elevating means is fixed to the ground, and the piston is attached to the piston. The rotary shaft of the table may be integrated in the vertical direction, and the rotary shaft of the table may be rotatable to the casing so that the rotational force of the motor absorbs the vertical movement of the piston and is transmitted. The rotation of the table rotation shaft with respect to the casing may be obtained by making the table rotatable with respect to the piston (see the embodiment), or the piston may be made rotatable by the casing.

In the configuration using these hydraulic cylinders, the motor, the hydraulic cylinder, and the table can be the same if the table rotation shaft passes through the casing and has the same axis as the output shaft of the motor. Since it is located on a straight line, the installation space for the motor and the hydraulic cylinder on the ground is reduced, and the size of the mill itself can be reduced.

The means for absorbing the vertical movement of the piston (rotating shaft) requires a flexible joint that can move in the axial direction, for example, an Oldham joint, which can absorb the misalignment of the shaft center and has high manufacturing accuracy. However, the manufacturing cost can be reduced. At this time, the Oldham coupling transmits the torque of the motor to the table rotation shaft directly or via a piston. That is, the table rotation shaft is directly rotatable with respect to the piston, and the table rotation shaft is integrated with the piston in the rotation direction via the piston. Even in the case of this integral structure, it can be directly transmitted to the table rotating shaft.

Further, if the opening of the chute for charging the crushed object is made to face the upper surface of the table, and the gap between the opening of the chute and the upper surface of the table can be adjusted by raising and lowering the chute, the amount of the crushed object can be adjusted. Can be adjusted by adjusting. As a specific configuration, the charging chute is formed of a telescopic double pipe, and a pipe facing an upper surface of the table can be moved in an axial direction with respect to another pipe by a cylinder by a cylinder. A sensor which is detected by a feeder opening detecting mechanism and input to the control unit, and the gap is adjusted and controlled via the control unit may be employed.

[0021]

FIG. 1 to FIG. 4 show an embodiment of a vertical mill according to the present invention.
2 and 3 are fixed, and an arm 2 a is provided in four equal parts around the inner surface of the lower frame 2, and a hydraulic cylinder 10 is supported by the arm 2 a via a support ring 4. A lid 5 is attached to the upper frame 3, and a charging cylinder (charging chute) 6 for the crushed material a is provided at the center of the lid 5.
The input chute 6 is a chute with a hopper in which the upper hopper 6a of the lid 5 is integrally formed. An adjustment cylinder (adjustment chute) 7 is fitted to the input chute 6 via a cylinder 7a so as to be able to move up and down. The adjustment chute 7 is moved up and down by the expansion and contraction of a piston rod of the cylinder 7a (the pipe 7 moves with respect to the pipe 6). (Moving in the axial direction) the level of the lower end inlet, that is, the gap δ between the chute 7 and the table 8 described later.
₂ is adjusted.

By this adjustment, the amount of the chute 7 fed through the opening is controlled, and the layer thickness of the crushed material a on the table 8 is kept constant. The gap δ ₂ is detected by a table feeder opening detection mechanism 7 c, for example, by a linear scale provided between the flange 7 b of the adjustment chute 7 and the input chute 6, and the detection result is a control unit of the vertical mill (not shown). Is input to In the case of changing the setting of the gap δ ₂ , when a change setting value is input to the control unit, the cylinder 7 a operates via the control unit to move the adjustment chute 7 up and down, and the gap δ ₂ is adjusted to a predetermined value. That is, the gap δ ₂ is detected by the table / feeder opening detection mechanism 7 c, the detection result is displayed on the control panel, and the gap δ ₂ is adjusted by operating a switch on the control panel to set the gap δ _2.
The supply amount of the crushed material a from is controlled. by this,
The load at the time of crushing and pulverizing is stabilized and powdering is reduced.

A rotary table 8 is provided at the axis of the hydraulic cylinder 10, and roller tires 9 are provided at three equal parts around the table 8. The roller tire 9 is rotatably supported by the upper frame 3 via a tire shaft 9a so as not to swing, and the crushed material a is loaded from the loading cylinder 6 while the table 8 is rotating. Then
The crushed material a is crushed and crushed between the roller tire 9 and the table 8. Note that the vertical mill of this embodiment includes means for facilitating the correction work due to the wear of the roller tire 9,
Although the size is reduced, the configuration will be described later.

The hydraulic cylinder 10 is provided in Japanese Patent Publication No.
The casing 11 is fixed to the support ring 4, and a cylindrical piston 12 is provided in the casing 11 so as to be able to move up and down. A hydraulic chamber 13 a is provided above and below the piston 12 in the casing 11.
An oil pipe 14a, 14b is connected to both chambers 13a, 13b, respectively.
When the lower hydraulic chamber 13b is drained, the piston 12 descends, and the lower hydraulic chamber 13b is refueled.
When the oil is drained from a, the piston 12 rises.
The rotating shaft 8a of the table 8 has a bearing 1 on the piston 12.
5 so as to be rotatably inserted and integrated in the elevating direction. The piston 12 is provided with a linear scale 16.
2 is detected.

The hydraulic circuit 30 for raising and lowering the piston is shown in FIG.
The hydraulic pressure is applied from the tank T to the upper and lower hydraulic chambers 13a and 13b in the cylinder 11 by the motor / pump 31 via the switching valve 32 and the check valves 33 and 34. Therefore, as described above, when oil is supplied to the upper hydraulic chamber 13a by the switching valve 32 (the state shown in FIG. 2B),
The piston 12 descends, and conversely, when oil is supplied to the lower hydraulic chamber 13b (the state of FIG. 3A), the piston 12 rises.
The vertical movement of the piston 12 is the vertical movement of the table 8,
The amount of elevation (gap δ ₁ between table 8 and roller tire 9)
Is detected by the linear scale 16, and when the required position is reached, refueling is stopped.

That is, when the gap δ ₁ is changed in a narrowing direction, for example, when the gap is widened due to abrasion, the gap is widened, and as shown in FIG. When the hydraulic pressure is applied to the lower hydraulic chamber 13b of the hydraulic cylinder 10 via the oil pipe 14b, the piston 12 rises with the rise of the hydraulic pressure, and the table 8 rises in synchronization. As the piston 12 rises, the oil pressure in the upper hydraulic chamber 13a also rises, and the rise in the oil pressure releases the spring of the check valve 34, so that the oil in the upper hydraulic chamber 13a flows into the tank T. I do. Piston 12 by set amount
Is raised, the hydraulic pump 31 is stopped.

On the other hand, when the setting of the gap δ ₁ is changed in the direction in which the gap δ ₁ is widened, for example, in order to slightly increase the particle size of the material to be crushed, as shown in FIG.
When the hydraulic pressure is switched to 2 and the hydraulic pressure is applied to the upper hydraulic chamber 13a of the hydraulic cylinder 10 via the oil pipe 14a by the motor / pump 31, the piston 12 descends and the table 8 descends synchronously. At this time, the oil in the lower hydraulic chamber 13b is
Since the hydraulic pressure of b applies the pilot pressure to the check valve 33 to open it, it flows into the tank T via the oil pipe 14b. When the piston 12 descends by the set amount, the switching valve 32 is moved to the position shown in FIG.
Switch from (b) to (a) and stop the motor / pump.

At the time of this adjustment, the gap δ ₁
, Ie, the linear scale 16 or the like, and the detection result is input to a control unit of the vertical mill (not shown). When setting change gap [delta] ₁ inputs the change set values to the control unit, a predetermined value hydraulic circuit 30 is activated by the control unit.

With this operation, when the required gap δ ₁ is reached, the hydraulic cylinder 10 is moved up and down by the upper and lower hydraulic chambers 13a, 13a.
b is a state where a constant pressure is sealed. That is,
Since the backflow is prevented by the check valve 33 in the lower hydraulic chamber 13 b, only the pressure due to its own weight of the table 8 and the like is generated, while the backflow in the upper hydraulic chamber 13 a is caused by the spring of the check valve 34. The upper and lower hydraulic chambers 1
3a and 13b are in a state where the pressure is balanced. Note that the upper and lower hydraulic chambers 13a and 13b do not necessarily have to be balanced.
a may be open. Therefore, the check valve 34 need not be provided. Incidentally, the check valve 34 has an effect of adjusting the return amount of the oil in the upper hydraulic chamber 13a when the piston 12 is raised at the time of setting the gap. When the upper hydraulic chamber 13a is open,
When oil is poured into the lower hydraulic chamber 13b, the piston 12 rises quickly. Therefore, a throttle valve or an orifice can be used instead of the check valve 34. In this manner, the setting of the gap δ ₁ is easy because only the table 8 needs to be moved up and down by one hydraulic cylinder 10 and the hydraulic circuit 30.

Further, during the crushing operation, a large crushed material a enters between the roller tire 9 and the table 8,
When the layer thickness increases and a high load (impact force) occurs, the lower hydraulic chamber 1
Since pressurization occurs in 3a, oil is supplied to the upper hydraulic chamber 13b through the relief valve 35. This refueling is performed in the upper and lower hydraulic chambers 1
Since 3a and 13b have the same sectional area, the piston 1
The oil having a volume equal to the amount of movement of 2 moves to absorb the impact force. The relief valve 35 is preferably of a high flow type. In the figure, 36 is a strainer, 37 is a pressure gauge, 37a
Is an oil level gauge, 38 is an air freezer, and 39 is a relief valve. When the oil pressure in the oil pipe 14b from the pump 31 becomes abnormally high for some reason, the relief valve 39 releases the pressure.

A support frame 17 is fixed below the support ring 4, and an inverter motor M is provided on the frame 17. The inverter motor M does not require a reduction gear, can be reduced in size, and has a variable rotation speed. A motor other than an inverter motor can be used as the motor M. The rotation shaft (output shaft) 20 of the motor M and the table rotation shaft 8a have the same axis and are connected by an Oldham coupling 21 which is a flexible coupling movable in the axial direction. The Oldham coupling 21
As shown in FIG. 3, a member 21a fixed to the motor rotation shaft 20 and a member 2a fixed to the table rotation shaft 8a
1b and a floating cam member 21c fitted to both members 21a and 21b. The method of transmitting the rotational force to the output shaft 20 can also be performed via a motor, a reduction gear, or the like that is not installed on various types of rotating shafts described later and known.

The member 21b of the Oldham's joint 21 is integrated with a rotary shaft 8a by screwing a retaining ring 21d to both of the members 21c and 8a, and the member 21a is integrated with the rotary shaft 20 by a key. The cam 21c is a member 21
a guide 21e fixed to a, stop plate 21f, packing 2
It is movably supported in only one direction via 1g. The Oldham coupling 21 is capable of transmitting a rotational force even if the axes of the two rotating shafts 8a and 20 are misaligned, and is easy to assemble them. This joint portion is connected to the member 21a and the member 2
Intrusion of dust is prevented by covers 22a and 22b provided on the 1b side, respectively. As the flexible coupling, a slide (sliding type) coupling capable of moving the table 8 up and down with respect to the fixing of the motor M in place of the Oldham coupling 21, for example, a gear coupling, a spline coupling, and the like described below may be used.

FIGS. 5 and 6 show details of the correcting means 70 when the roller tire 9 fixed to the upper frame 3 is worn. The correcting means 70 is a hydraulic jack 71 shown in FIG.
And frame rotating means 72 shown in FIG. FIG.
As shown in the figure, a hydraulic jack (or a hydraulic cylinder) 71 for lifting the upper frame 3 is provided at the portion where the joint portion divided into the upper frame 3 and the lower frame 2 is fixed with bolts. The flange at the top is at least equidistant. The hydraulic jack 71 may be lifted simultaneously with the upper frame 3 by manual operation. However, it is preferable that all hydraulic jacks be simultaneously operated by remote control by using a fixed pipe (not shown).
The projecting piston 71a of the hydraulic jack 71 is
The upper frame 3 is lifted by a predetermined dimension by pushing up the lower end flange of the upper frame 3.

The frame rotating means 72 rotatably supports a rotating shaft 74 having a slightly tapered support roller 73 with a bearing 75, and stores the rotating shaft 74 in a case 76.
A handle 77 is detachably attached to the other end of the handle 4. The case 76 is attached and fixed with a bolt (not shown) extending the upper end flange of the lower frame 2 at an attachment portion. The attachment site is also provided at least in three equal parts.

[0035] This embodiment is the above construction, the upper and lower hydraulic chamber 13a of the hydraulic cylinder 10, by supplying and discharging oil to 13b, by elevating the table 8, a gap [delta] ₁ of the roller tire 9 the required Value. After that, when the table 8 is rotated by the motor M and the material to be crushed a is thrown in, the material is crushed and crushed while maintaining the gap δ ₁ between the table 8 and the roller tire 9. The crushed material b falls downward from around the table 8. At this time, the fall is smoothly guided by the guide plate 2b on the arm 2a. The fallen object b is transported to a required position by various conveyors.

When the crushed material a is continuously crushed or crushed by the vertical mill of this embodiment having the above operation, the roller tire 9
However, the wear does not always occur uniformly for all the roller tires 9, and the wear at a specific position among the three places may be greatly worn, resulting in so-called uneven wear. The cause is caused by the overlap of various factors such as non-uniformity of the material of the roller tire 9, non-uniformity of the supply amount, and non-uniformity of the particle size. It is because it is difficult. When such uneven wear occurs, the crushing dimensional accuracy of the crushed material as a product varies, and it becomes impossible to maintain uniform quality of the product. For this reason, as a method of correcting this, correction is performed by moving the set position of the roller tire 9 with respect to the lower frame 2 by the correction means and moving the unevenly worn roller tire 9 to a new position. In order to perform this correction work, first, the table 8
Is stopped, the bolts fixing the upper frame 3 and the lower frame 2 are removed, and the hydraulic jack 71 is operated to lift the upper frame 3 by a predetermined dimension.

Next, as shown in FIG. 6A, the frame rotating means 72 is provided between the flanges of the upper and lower frames 3 and 2.
Insert and secure. Thereafter, the protruding rod 71 a of the hydraulic jack is lowered, and the load of the upper frame 3 is supported on the support rollers 73 of the frame rotating means 72. When the handle 77 is rotated to rotate the support roller 73, the upper frame 3 supported thereon is rotated with respect to the lower frame 2 as a whole. As a result, (a) of FIG.
As shown in (b), the unevenly worn roller tire 9 (a) is replaced by the unevenly worn roller tire 9 (b), and the respective roller tires 9 operate at different positions. By appropriately performing such replacement operation, uneven wear of the roller tire 9 is eliminated.

FIGS. 7 to 10 show another embodiment. In the embodiment shown in FIGS. 7 and 8, the roller tire 9 is supported by a trunnion joint 9b, and is pressed in the direction of the table 8 by a pressing spring 45. It is designed to be pressed. The rotating shaft 8a of the table 8 is surrounded by a lifting cylinder 47, and is rotatably supported by a radial bearing 48 above the lifting cylinder 47. A thrust self-aligning roller bearing 52 is provided between the table 8 and the elevating cylinder 47.

A pulley 49 is externally fitted on the rotating shaft 8a, and the pulley 49 is rotatably supported on its upper and lower sides by bearings 50 and 51. Both bearings 50 and 51 are formed by supporting members (not shown). Thus, it is fixed to the casing (frame) 2. The rotating shaft 8a and the pulley 49 are arranged as shown in FIG.
As shown in FIG. 7, a vertical ridge 53 provided on the outer peripheral surface of the rotating shaft 8a and a vertical groove 56 formed on the inner peripheral surface of the pulley 49 are engaged with each other. Are slidable in the vertical direction and integrated in the rotational direction. That is, it is a spline bearing. Note that the rotating shaft 8a and the pulley 49 may slide in the vertical direction and be engaged (integrally) in the rotating direction. For example, as shown in FIG. The cross section of the shaft 8a is square,
A well-known configuration, such as engaging the inner peripheral surface of the pulley 49 as a quadrangle corresponding thereto, may be employed. The pulley 49 is connected to a pulley 55 of a motor M with a reduction gear fixed on the ground G outside the casing 2 by a V-belt 57.
Instead of the V-belt 57, a known transmission means such as a timing belt may be employed.

A bottom plate 58 is fixed to a lower portion of the elevating cylinder 47, and a hydraulic cylinder 59 as elevating means is provided on the ground G below the bottom plate 58. The bottom plate 58 is fixed so that the piston rod 59a of the hydraulic cylinder 59 cannot rotate.

In this embodiment, the hydraulic cylinder 59 is moved up and down to raise and lower the lifting cylinder 47, the rotary shaft 8a, the table 8 and the like.
The gap δ ₁ between the roller tire 9 and the roller is adjusted. At this time, the gap δ ₁ is equal to the hydraulic cylinder 59 (actually a piston).
Is detected by measuring the amount of expansion and contraction with a displacement meter such as the linear scale 16. Further, the pulley 49 is
Cannot move in the vertical direction due to the fixed bearings 50 and 51, but the protrusion 53 slides in the groove 56, whereby the rotary shaft 8 a moves up and down with respect to the pulley 49 to absorb the rotation.

After the required gap δ ₁ is reached, the motor M is driven to rotate the table 8, and the engagement of the ridge 53 and the groove 56 ensures that the pulley 49 rotates on the rotating shaft 8a. The table 8 rotates. The material to be crushed a is supplied onto the rotating table 8 and crushed by being caught between the roller tire 9 and the table 8 urged by the pressure spring 45.

In the embodiment shown in FIG. 9, the spur gear 62 is mounted on the rotating shaft 8a.
Are externally fitted and fixed, and a pinion 63 is meshed with the spur gear 62. The pinion 63 is rotated by a motor M with a speed reducer via a bevel gear box 64.

In this vertical mill, the rotating shaft 8a can be moved up and down by a hydraulic cylinder 59 and receives a rotating force via a pinion 63 and a spur gear 62. At this time, the width (height) of the spur gear 62 is made larger than that of the pinion 63, so that even when the rotating shaft 8a moves up and the position of the spur gear 62 changes, the engagement between the spur gear 62 and the pinion 63 is ensured. As a result, the rotating shaft 8a can be rotated.

In the embodiment shown in FIG. 10, the rotating shaft 8a
Is a rotating shaft (piston rod) 59a having a square cross section.
The piston section 59c is designed to have a cross-sectional area larger than that of the rotary shaft section 59a and the casing 59 of the hydraulic cylinder 59.
b. The upper surface of the cylinder casing 59b is formed in an opening having a rectangular cross section, and a rotation shaft portion 59a having a rectangular cross section penetrates this opening, so that rotation with respect to the cylinder casing 59b is prohibited, and only vertical movement is allowed. You.

The hydraulic cylinder 59 is rotatably supported by a support cylinder 60 fixed to the ground G via a bearing 51 and is installed on the ground G. A rotary cylinder for supplying and discharging oil is provided at a lower end of the hydraulic cylinder 59. A joint 65 is provided. Oil is supplied to and discharged from the hydraulic cylinder 59 by a hydraulic pump (not shown) via the rotary joint 65, and the piston portion 59c moves up and down, so that the table 8 and the rotary shaft 8a move up and down integrally.

The pulley 4 is mounted on the cylinder casing 59b.
9 'is fixed, and when the pulley 49' is rotated by a motor M (not shown), the cylinder casing 59b rotates, and the table 8 also rotates.

Although each of the above-described embodiments is for the case of crushing sand, etc., each of the embodiments can be adopted also in the case of crushing. At this time, for example, as shown in FIG. 11, the crushed material a is put on the table 8 from the screw feeder 60,
The pulverized material b ′ is conveyed by the air introduced from the lower part of the casing 2, rises, passes through the classifier 61, and is guided to a collector such as a bag filter, so that the pulverized material b ′ can be formed into a vertical mill for pulverization.

In the embodiments after FIG. 7, the hydraulic cylinder 59 is controlled by the hydraulic circuit 30 shown in FIG. Further, the roller tire 9 does not apply the pressing force by the pressing spring 45, and may not swing as shown in FIG.

[0050]

As described above, according to the present invention, the rotating means and the elevating means of the table can be respectively installed on the ground, and the means for correcting uneven wear of the roller tires is provided. Thus, the cost can be reduced and the correction work due to uneven wear of the roller tire can be facilitated. In addition, it is easy to suppress the unbalanced load during rotation of the table as much as possible, the vibration is small, and the rotation of the table can be smooth.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of one embodiment.

FIG. 2 is a sectional view of an essential part of the embodiment in a state where a piston is raised.

FIG. 3 is an exploded perspective view of the Oldham coupling of the embodiment.

FIG. 4 is a hydraulic circuit diagram of the embodiment.

FIG. 5 is a main sectional view of the frame rotating means.

FIG. 6 is an explanatory diagram of a correction operation.

FIG. 7 is a schematic sectional view of a main part of another embodiment.

FIG. 8 is a cross-sectional view showing each example of fitting of the table rotating shaft and the pulley of the embodiment.

FIG. 9 is a schematic cross-sectional view of a main part of another embodiment.

FIG. 10 is a schematic sectional view of a main part of another embodiment.

FIG. 11 is a schematic sectional view of a main part of another embodiment.

[Explanation of symbols]

a, a 'Crushed object b Crushed object b' Crushed object G Ground M Table rotation motor 2, 3 Mill casing (upper and lower frames) 6, 7 Input chute 7a Input chute telescopic cylinder 7c Table / feeder opening detection mechanism (linear Scale) 8 Table 9 Roller tire 10 Hydraulic cylinder 11 Cylinder casing 12 Piston 13a, 13b Hydraulic chamber 20 Motor rotation shaft (output shaft) 21 Oldham coupling 30 Hydraulic circuit 45 Pressure spring 47 Lifting cylinder 49, 49 'Pulley for rotation shaft 55 Pulley 59 Hydraulic cylinder 59b Cylinder casing 60 Support cylinder 62 Spur gear 63 Pinion 70 Correction means 71 Hydraulic jack 72 Frame rotation means 73 Support roller

Claims (9)

[Claims] 1. A vertical mill for compressing and crushing a crushed object by feeding a crushed object a between a rotating table 8 and a roller tire 9 adjacent to the table 8, the table 8 being supported by a vertically moving means so as to be vertically movable. Then, the lifting / lowering means and the rotating means of the table 8 are respectively installed on the ground G, and from the rotating means, the rotating axis 8a of the table 8 is
The frame that houses the table 8 and the roller tire 9 is divided into upper and lower parts, and the means for correcting uneven wear of the roller tire 9 attached to the upper frame 3 is divided into frames. A vertical mill installed at a location. 2. The vertical mill according to claim 1, wherein said correcting means comprises a hydraulic jack for lifting the upper frame and frame rotating means for rotating the upper frame. 3. The casing 11 of the hydraulic cylinder 10 serving as the elevating means is fixed to the ground G, and the rotating shaft 8a of the table 8 is integrated with the piston 12 in the elevating direction.
3. The vertical mill according to claim 1, wherein the table rotating shaft 8a is rotatable to the casing 11 so that the rotational force of the motor M is transmitted by absorbing the elevation of the piston 12. . 4. The vertical mill according to claim 3, wherein the table rotation shaft 8a passes through the casing 11 and has the same axis as the output shaft 20 of the motor M. 5. The table rotating shaft 8a and the output shaft 20 of the motor M are connected by an axially movable flexible joint, and the flexible joint absorbs the elevation of the piston 12. The vertical mill according to claim 3. 6. The Oldham coupling 2 as the flexible coupling.
The vertical mill according to claim 5, wherein the number is 1. 7. A rotatable table 8 is supported so as to be able to move up and down, and the elevating means and the rotating means of the table 8 are installed on the ground G, respectively.
The rotary shaft 8a absorbs the vertical movement of the rotary shaft 8a and transmits the rotational force to feed the crushed material a 'between the table 8 and the roller tire 9 close to the table 8 to compress and pulverize. A casing 11 of a hydraulic cylinder 10 serving as the elevating means.
Is fixed to the ground G, and the table 8
The rotary shaft 8a is integrated in the vertical direction, the table rotary shaft 8a is rotatable to the casing 11, and the rotational force of the motor M absorbs the vertical movement of the piston 12 and is transmitted. A vertical mill wherein a frame accommodating the tires 9 is divided into upper and lower parts, and a means for correcting uneven wear of the roller tires 9 mounted on the upper frame 3 is provided at a frame dividing position. 8. An opening of the chute 7 for charging the object to be crushed is made to face the upper surface of the table 8, and a gap δ ₂ between the opening of the chute 7 and the upper surface of the table can be adjusted by raising and lowering the chute 7. The vertical mill according to claim 1. 9. The charging chute 7 is composed of telescopic double tubes 6, 7, and the tube 7 facing the upper surface of the table 8 can be moved in the axial direction with respect to the other tubes 6 by a cylinder 7a. Wherein said gap δ ₂ is detected by a table / feeder opening detection mechanism 7 c and input to a control unit, and said gap δ ₂ is adjusted and controlled via said control unit. 8. The vertical mill according to 8.