JP2001099139A - Outboard roller compactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a cooling water rotary joint from getting in the way of monitoring of work, prevent generation of such a risk that water is leaked from an attaching part, facilitate dismounting and cleaning, shorten an inner width of the axial direction of a roll of a sealed case, simplify a dismounting/ mounting operation of the roll, and employ a commercial standardized geared motor capable of easily getting in a low cost. SOLUTION: Roll shafts are supported in parallel with each other by a bearing disposed in a bearing box, a load in a direction contracting a distance between roll shafts is applied on the bearing box, and a pair of rolls are mounted on end parts protruded to the same direction from the bearing box of the roll shafts. A gear in the gear box connected to an end surface of the bearing box is attached to an end part protruded from the bearing box in a direction reverse to the roll of the roll shaft, an opening of a passage for cooling water disposed on a center line of the roll shaft is disposed on an end surface protruded from the gear box, and a water leading pipe inserted on the center line of the passage and a rotary joint having an inlet and an outlet for cooling water are connected to the opening, and thereby, the roll can be cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller compactor used for producing pharmaceuticals, color toners, granules of certain industrial chemicals, and the like. A fine powder material is supplied using a screw feeder or the like between a pair of rolls that rotate at the same speed in the opposite direction and that are applied with a load in a direction to reduce the gap between the two rolls. The raw material is strongly compressed to produce a strip-shaped or small-sized product, and then each of the rolls is placed in a bearing box in a roller compactor which is crushed to obtain granules having a desired particle size range. The present invention relates to a cantilever type roller compactor having a structure attached to one end of a roll shaft supported by an internal bearing and protruding from a bearing box.

[0002]

2. Description of the Related Art In a conventional cantilever type roller compactor, as shown in FIG. 9, the central portions of roll shafts 41 and 41 'are supported by bearings inside bearing boxes 42 and 42', respectively.
Rolls 43 and 43 'are attached to the ends of the roll shafts 41 and 41' projecting from the same side from 42 'by shrink fitting, and cooling water is supplied to the end surfaces of the roll shafts inside the rotating roll shafts 41 and 41'. Then, the rotary joints 44, 44 'for taking out the water having cooled the inner surfaces of the rolls 43, 43' from the rotating shaft.
To cool the rolls 43 and 43 '.

[0003] In addition, the rolls 43 of the roll shafts 41 and 41 ',
43 ′ in the direction opposite to the end where the 43 ′ is mounted,
42 'and the end protruding from 42' are rotated at the same speed in parallel and opposite directions, and the center distance between them is
Two output shafts 46, 4 substantially equal to the center distance of 1, 41 '
The output shafts 46 and 46 'of the two-output shaft gear box 45 having the motor 51 and having the 6' are connected with the conversal joints 47 and 47 ', respectively, and the center distance between the roll 43' and the roll 43. Even if the value fluctuates, it is possible to rotate at the same speed in opposite directions.

[0004] Between the rolls 43, 43 'and the bearing boxes 42, 42', there is a partition wall 48 through which the roll shafts 41, 41 'pass. Crusher (not shown) for crushing products
Surrounds the working part 50 of the rotary sizing machine for sizing the crushed material and the rotary joints 44, 44 'for cooling.

[0005]

In recent years, when granules of pharmaceuticals, color toners, and certain industrial chemicals are manufactured by a roller compactor, the granules are manufactured in a dustproof sealed case or a nitrogen gas sealed case. There is a need for easy disassembly, cleaning and sterilization of parts.

[0006] In the cantilever roller compactor, a pair of rolls, a device for crushing a band-like product, and a rotary sizing device under these are mounted in a sealed case or a transparent seal provided with the partition wall and a glass window for work monitoring. When working in a closed case, there are two cooling water rotary joints and two cooling water supply and discharge tubes connected to this in the closed case, which hinders work monitoring. There was a risk of water leaking from the mounting part. Also, it is troublesome to attach and remove the rotary joint every time it is disassembled and cleaned.

In order to accommodate the rotary joint, the inner width of the roll of the closed case in the axial direction is significantly larger than that without the rotary joint. The rotary sizing device having a plate also has a disadvantage that it becomes unnecessarily large.

In order to connect the rotary joint to the roll shaft end,
The roll was shrink-fitted on the roll shaft to transmit torque from the roll shaft to the roll. For this reason, the removal and attachment of the rolls are troublesome because they are firmly fitted.

[0009] Since the fine powder material contains a large amount of air,
To compress between rotating rolls and combine the individual particles without binder into a band-like product, compress the air gradually so that it is not trapped in the raw material. It is necessary to harden by pushing out. For this reason, although the roll varies depending on the nature of the raw material, the speed must be low, about 8 to 20 rpm, and there is a phenomenon that a large torque must be applied.

A geared motor having a capacity suitable for driving each roll separately has a large reduction ratio, so that the reduction gear box is large, and the outer diameter of the three-phase induction motor for driving the gear box is larger than the roll diameter. Therefore, when the roll shaft and the geared motor are connected by two universal joints, a phenomenon occurs in which the universal joints do not become substantially parallel to each other. Was something.

The present invention solves the above-mentioned problems, that is, to prevent a rotating joint for cooling water from obstructing work monitoring or to cause a danger of water leakage from a mounting portion, and to facilitate disassembly and cleaning. To reduce the axial width of the closed case roll in the axial direction, to make it easy to remove and install the roll, and to be able to use a commercially available semi-standard geared motor that is inexpensive and easily available. ,With the goal.

[0012]

According to the first aspect of the present invention, each roll shaft is supported by bearings inside the bearing box so as to be parallel to each other, and the bearing box has a distance between the roll shafts. Is applied in the direction of shrinking. A pair of rolls is mounted on the end of the roll shaft protruding from the bearing box in the same direction.

A gear in a gear box connected to an end face of the bearing box is attached to an end of the roll shaft protruding from the bearing box in a direction opposite to that of the roll.
An opening for a cooling water passage provided on the center line of the roll shaft is provided. This opening is connected to a water pipe inserted on the center line of the passage and a rotary joint having an inlet and an outlet for cooling water so that the roll can be cooled.

The gear box is provided with an input shaft mounted with a gear attached to the above-mentioned roll shaft and a gear meshing with the inside of the gear box, and power is applied to this shaft so that the roll can rotate.

This makes it possible to eliminate the cooling water rotary joint and the cooling water supply and discharge hoses connected to the ends of the respective roll shafts where the rolls are mounted. The inner width of the closed case surrounding the pair of rolls, the strip-shaped product crushing device and the rotary sizing device can also be significantly reduced, and therefore the axial width of the rotary sizing device can also be significantly reduced. Removal and installation of the rotary joint and the hose during the disassembly and cleaning work performed at the end of the granulation work can be omitted.

According to the second aspect of the present invention, in the gear box mounted on the end face of each bearing box, the distance between the input shaft parallel to the roll axis of the gear engaged with the gear mounted on the roll shaft is large. Attach the gearbox in such a position.

Since the distance between the input shafts is significantly larger than the distance between the respective roll shafts, the input shaft and the output shaft of the geared motor capable of driving the respective rolls are connected by a conversal joint. Combined, it is possible to employ two commercially available standard geared motors, which were not possible with the prior art. Thereby, the mounting space for the driving device can be reduced.

According to the third aspect of the present invention, the output shaft is parallel to the roll shaft on the other side surface of the gear box mounted so that the side surface is connected to the end surface of the bearing box supporting the roll shaft by the internal bearing. A geared motor is mounted so that the gear fixed to the output shaft meshes with the gear fixed to the roll shaft inside the gear box. By doing so, the universal joint can be omitted and the drive device can be simplified.

According to a fourth aspect of the present invention, a roll whose outer diameter is smaller than the cylindrical surface of the roll for compressing the fine powder material and whose inner diameter is larger than the diameter of the roll shaft at the portion where the roll is attached is provided on the end face opposite to the roll bearing box side. A cylindrical portion concentric with the shaft is provided, and an outer surface between the inner surface of the cylindrical portion and the roll shaft is a cylindrical surface in contact with the inner surface of the cylinder, and the inner surface is a conical surface whose center line is on the center line of the outer surface of the cylinder. Insert a fastening ring in which the ring and the outer surface are a conical surface that is in close contact with the inner surface of the cone, and the inner surface is a cylindrical surface that is in contact with the roll shaft. The attached disk is strongly tightened in the axial direction with bolts provided on the end surface of the roll shaft, and the torque for driving the roll from the roll shaft is transmitted by the large frictional force acting on the inner surface, inner conical surface, and outer surface of this fastening ring. At the same time The inner surface of Lumpur so that cooling water does not leak to cool.

When a rotary joint for cooling water is attached to the end of a roll shaft to which a roll is attached as in the prior art, the roll is shrink-fitted to the roll shaft and the roll is firmly connected to the roll shaft to transmit torque. I was Therefore, it is very troublesome to pull out the roll from the roll shaft and return it again.

According to the present invention, since the transmission of torque from the roll shaft to the roll is performed by the friction fastening ring, the inner surface of the roll and the outer surface of the roll shaft are removed from the bolt provided at the shaft end with a light interference fit. And the fastening ring can be easily removed. Next, it is easy to pull out the roll from the roll shaft or to push the roll into the roll shaft again.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of the present invention; FIG. The rolls 1, 1 'are mounted on the ends of roll shafts 3, 3' which are supported parallel to one another by bearings inside the bearing housings 2, 2 '. The tails of the brackets 4, 4 'of the bearing housings 2, 2' are connected by a shaft 5 parallel to the roll shafts 3, 3 '. A tension hydraulic cylinder 6 is attached to an intermediate portion of the brackets 4 and 4 ', and a load acting on the rolls 1 and 1' acts in a direction to reduce a gap between the two.

Gear boxes 7, 7 'are attached to the end faces of the bearing boxes 2, 2'. Roll shafts 3 and 3 'inside each
And gears 10, 10 'meshing with gears 8, 8' mounted on input shafts 9, 9 'parallel to the roll shafts 3, 3', respectively.

Rotary joints 11, 11 'for cooling water are attached to the ends of the roll shafts 3, 3'. The water supply pipes 12, 12 'of the rotary joints 11, 11' are inserted on the center lines of cooling water passages 13, 13 '(not shown) provided at the centers of the roll shafts 3, 3'. The cooling water sent by the water pipes 12, 12 'cools the inside of the rolls 1, 1', and then passes between the inner walls of the passages 13, 13 'and the water pipes 12, 12' to form the roll shaft 3, 3 'is cooled, thereby lowering the temperature of the bearings attached to the roll shafts 3, 3', and taken out from the rotary joints 11, 11 '.

The input shafts 9, 9 'are supplied with power for rotating the rolls 1, 1' in the direction of the arrow attached to the rolls 1, 1 'in FIG. The screw feeder 14 includes a raw material hopper 15, a screw 17 driven by a geared motor 16, and a raw material supply box 19 connected to a tip of a case 18 of the screw 17. By the rotation of the screw 17, the fine powder raw material in the raw material hopper 15 becomes the raw material supply box 1.
It is sent to 9.

The raw material supply box 19 protrudes into a sealed case 21 attached to a partition wall 20, and feeds raw materials between the rolls 1 and 1 '. The fine powder material is strongly compressed by the rotation of the rolls 1 and 1 ′ and the load generated by the hydraulic cylinder 6, and turns into a strip-like or small-piece flake and slides down the chute 22.

The lower end of the chute 22 is shaped like a comb blade, and the flakes sliding down the chute 22 are roughly crushed by several rotary blades 23 passing between the comb blades. The crushed material surrounds a rotor 25 having several blades 24 on the outer periphery and a lower half of the rotor 25, and falls into a rectifier 27 composed of a perforated plate 26 traversing the sealed case 21, and a hole in the perforated plate 26 is formed. The smaller ones pass through this, and the larger ones are crushed between the rotating blades 24 and the perforated plate 26 to the fineness that passes through the holes in the perforated plate 26, and out of the machine through the opening 28 at the bottom of the closed case 21. Taken out.

Thus, granules can be produced inside the closed case 21. When the screw feeder 14 is retracted and the sealed case 21 is opened, cleaning and disinfecting of each part can be facilitated.

An embodiment of the invention according to claim 2 will be described with reference to FIG. Gear boxes 7, 7 'are attached to the end faces of the bearing boxes 2, 2' so that the center distances of the respective input shafts 9, 9 'are widened. The geared motors 29, 29 'for driving the respective rolls 1, 1' separately and the input shafts 9, 9 'can be operated by universal joints 30, 30' parallel to each other.

In some cases, the input shaft 9 is on a horizontal plane passing through the roll shaft 3, the input shaft 9 ′ is on a horizontal plane passing through the roll shaft 3 ′, and the center distance between the input shafts 9 and 9 ′ is large. The gear boxes 7, 7 'are connected to the end faces of the bearing boxes 2, 2', respectively, so that the rolls 1, 1 'can be driven by the geared motors 29, 29' and the universal joints 30, 30 '. It is.

An embodiment of the invention according to claim 3 will be described with reference to FIG. Geared motor 3 on the side of gear box 7, 7 '
1, 31 ', and gears 33, 33' (not shown) attached to respective output shafts 32, 32 '(not shown) and gears 8, 8' (shown in FIG. (Not shown). In this way, the universal joints 30 and 30 'can be omitted.

An embodiment of the invention according to claim 4 will be described with reference to FIG. On the side surface of the roll 1, there is a cylindrical portion 34 parallel to the center line of the roll 1, and is pushed into the end of the roll shaft 3 with a light interference fit.

Between the roll shaft 3 and the cylindrical portion 34, a ring 3 having an outer surface slightly smaller than the inner diameter of the cylindrical portion 34 and an inner surface having a conical inner surface whose center line is the center line of the roll shaft 3.
5 and an outer surface having a conical outer surface contacting the conical inner surface;
A ring 36 whose inner surface is a cylindrical surface slightly larger than the roll shaft 3.
And a ring 36 on the outer periphery.
A disk 39 provided with a thin cylindrical portion 38 which comes into contact with the side surface of the roll shaft 3 is strongly tightened with a bolt 40 provided on the end surface of the roll shaft 3 in the direction of the center line of the roll shaft 3.
Is contracted, the ring 35 is expanded, and the roll 1 is fixed on the roll shaft 3 by frictional force generated by pressure generated on the inner surface of the ring 36, the conical surface of the ring 36 and the ring 35, and the outer surface of the ring 35. The torque is transmitted from the shaft 3 to the roll 1.

The O-ring 41 and the fastening ring 37 can prevent the cooling water from leaking from the contact surface between the roll shaft 3 and the roll 1, respectively. The roll 1 'is similarly fixed to the roll shaft 3'.

The embodiment of the present invention is not limited to the above. For example, as shown in FIG.
When using a combination type of a split ring whose taper ring is not integral (the transmission torque is larger in this case), an O-ring 41 'is inserted to prevent water leakage.

[0036]

According to the present invention, the inner width in the roll axis direction of the closed case surrounding the pair of rolls, the strip-shaped product crushing device, and the rotary sizing device does not require the provision of a cooling water rotary joint at the roll shaft end. Therefore, the size can be significantly reduced. The width of the rotor equal to the inner width of the sealed case, the perforated plate surrounding the lower half of the rotor, and the frame supporting the perforated plate can be significantly reduced.

The problem that the rotary joint for cooling water hinders the disassembly, cleaning and disinfection operations performed at the end of the granulation operation has been solved. The cooling water rotary joint is attached to the end of the roll shaft opposite to the end where the roll is attached, so even if there is water leakage from the joint with the hose, the raw material for granulation, No water is applied to the granules.

The cooling water cools the roll through the water pipe connected to the rotary joint, flows between the inner wall of the roll shaft and the water pipe, and returns to the rotary joint. Since the roll shaft is cooled when returning, the bearing can be cooled via the roll shaft even when the load on the roll is large. When the gear box attached to the end face of the bearing box is turned around the roll axis, the distance between the axes of the gears meshing with the gears on the roll axis in the gear box can be changed. .

When the distance between the shafts is increased, a commercially available standard type geared motor capable of driving each roll separately can be connected to a universal joint for operation. In some cases, stop the universal joint, attach a geared motor to the end face of the gear box,
The driving device can be simplified by meshing a gear fixed to the output shaft of the geared motor with a gear of the roll shaft.

According to the present invention, since there is no need to provide a rotary joint for cooling water at the end of the roll shaft to which the roll is mounted, the friction fastening ring mounted between the roll shaft and the roll is axially mounted on this end surface. Can be provided with bolts for tightening. Since the torque for driving the roll from the roll shaft is generated by the fastening metal, a light interference fit may be applied to the roll shaft and the inner surface of the roll. Therefore, it is easy to remove the roll from the roll shaft or push it in again. Depending on the fine powder material to be granulated, the surface of the roll is, for example, a smooth cylindrical surface, one with a large number of shallow transverse grooves in the axial direction, or one with a coarse pitch and a wide, deep groove. Is also possible.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the invention described in claim 1;

FIG. 2 is a vertical sectional view of the same.

FIG. 3 is an explanatory diagram of a hydraulic load device.

FIG. 4 is an explanatory view of a rotary joint for cooling water.

FIG. 5 is a vertical sectional view showing an embodiment of the invention described in claims 1 and 4;

FIG. 6 is a vertical cross-sectional view of an embodiment of the invention described in claim 2;

FIG. 7 is a vertical cross-sectional view of the embodiment of the third aspect of the present invention.

FIG. 8 is a vertical longitudinal section showing another embodiment and is a view corresponding to FIG. 5;

FIG. 9 is a vertical cross section showing a conventional example.

[Explanation of symbols]

 1, 1 'roll 2, 2' bearing box 3, 3 'roll shaft 6 hydraulic cylinder 7, 7' gear box 8, 8 'gear 9, 9' input shaft 10, 10 'gear 11, 11' rotary joint 12, 12 'water pipe 15 raw material hopper 17 screw 23 rotary blade 27 sizing machine 29, 29' geared motor 30, 30 'universal joint 31, 31' geared motor 35 ring 36 ring 37 fastening ring

Claims (4)

[Claims] 1. A pair of roll shafts, each supported by bearings inside the bearing housing and mounted on ends protruding from the bearing housing on the same side of the roll shaft and rotating at the same speed in parallel and opposite directions. The fine powder material is supplied to the gap between the rolls of the rolls, and the load applied to the bearing box in the direction of shrinking the gap strongly compresses the fine powder material to produce a strip-like or flake-like product. In a cantilever type roller compactor which is crushed to obtain granules of a required particle size range, the compactors protrude from the bearing boxes 2 and 2 'in a direction opposite to the end where the rolls 1 and 1' are mounted. At its ends are mounted gears 8, 8 'in gearboxes 7, 7' connected to the end faces of the bearing box, and the end faces out of the gearboxes 7, 7 'are on their center lines. Roll shafts 3 and 3 ′ provided with provided cooling water passages
And input shafts 9, 9 equipped with gears 8, 8 'parallel to the roll shaft and attached to the roll shafts 3, 3' and gears 10, 0 'meshing in the gear boxes 7, 7'. In the openings of the cooling water passages of the roll shafts 3, 3 ', there are provided water guide pipes 12, 12' inserted on the center line of the passages and rotary joints 11, 11 'having cooling water inlets and outlets. In addition to supplying cooling water by coupling, the torque for rotating the rolls 1, 1 'is applied to the input shaft 9,
9 ', a cantilevered roller compactor. 2. The roller compactor according to claim 1, wherein the gears are attached to the roll boxes inside the gear boxes connected to the end faces of the bearing boxes. Input shafts 9 and 9 'equipped with gears 10 and 10' meshing with gears 'and gear motors 29 and 2 for driving respective rolls 1 and 1'.
9 ′ output shaft and universal joint 30, 3
A cantilevered roller compactor characterized by being joined at 0 '. 3. The roller compactor according to claim 1, wherein the gears attached to the roll shafts 3, 3 'inside the gear boxes 7, 7' connected to the end faces of the bearing boxes 2, 2 '. The shafts of the gears 10 and 10 'meshing with the gear 8' are connected to the output shafts 32 and 3 of the geared motors 31 and 31 'connected to the end faces of the gear boxes 7 and 7'.
2 '. A cantilevered roller compactor, characterized by being 2'. 4. The cantilevered roller compactor according to claim 1, wherein the outer diameter of the rolls 1, 1 'is opposite to that of the bearing box 2, 2'. And a cylindrical portion concentric with the roll shafts 3 and 3 'having a smaller inner diameter than the cylindrical surface for compressing the fine powder raw material and having a larger inner diameter than the diameter of the roll shafts 3 and 3' at which the rolls 1 and 1 'are fitted. The outer surface between the inner surfaces of the cylindrical portions 34 and 34 'and the roll shafts 3 and 3' is a cylindrical surface that is in contact with the inner surfaces of the cylinders 34 and 34 '. Are combined with the circular rings 35, 35 ', which are conical surfaces, and the circular surfaces 36, 36', whose outer surfaces are conical surfaces that are in close contact with the inner surface of the cone, and whose inner surfaces are cylindrical surfaces that are in contact with the roll shafts 3, 3 '. The fastening ring 37, 37 'is inserted, and the cylindrical portion 3 which is in contact with the side surface of the fastening ring 37, 37'
Rolls 3, 8 'are attached to the rolls 39, 39'.
The shafts are tightened in the axial direction with bolts 40, 40 'provided on the end surfaces of the roll shafts 3', and the roll shafts 3, 3 'and the rolls 1, 1' are fastened at portions where the roll load for compressing the fine powder material is small, A cantilevered roller compactor characterized in that torque is transmitted from the rolls 3 and 3 'to the rolls 1 and 1', and at the same time, the fastening rings 37 and 37 'prevent roll cooling water from leaking.