JP3354464B2 - centrifuge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for separating small objects such as nuts and bolts from an object to be processed by using a centrifugal force to separate liquid substances such as oil adhering to the object. It relates to a centrifuge.

[0002]

2. Description of the Related Art Nuts, bolts, and other small machine parts are generally manufactured through machining such as forging and cutting, and a large amount of oil is used for lubrication or cooling during the machining. Further, when a large amount of dirt, chips and the like are adhered to the surface of the component, the component may be immersed in a cleaning oil to perform a cleaning process.
In any case, a considerable amount of oil adheres to the parts manufactured in this way, and centrifugal separators have been widely used to remove this oil. This means that, for example, components are put into a container having a large number of through holes in a wall portion, and in this state, the container is rotated to separate oil from the components by centrifugal force, and the separated oil is passed through It discharges from the hole to the outside.

[0003]

Most of the conventional centrifugal separators, after processing a predetermined amount of components, temporarily stop the rotation of the container, take out the processed components, and then remove new components. A batch processing method was adopted in which the container was charged and the container was rotated again. However, this method is inefficient because the removal of processed parts and the introduction of new parts have to be performed manually, and the rotation of the container must be completely stopped during the removal / input. Therefore, there is a disadvantage that the operation efficiency of the device is poor.

[0004] It is an object of the present invention to provide a centrifugal separator which can process a large number of parts extremely efficiently, has a high operation efficiency of the apparatus, and can reliably remove adhering oil and the like. To provide.

[0005]

In order to solve the above-mentioned problems, the centrifugal separator according to the present invention is driven to rotate around a predetermined axis, and the inside is a space for accommodating the object to be processed. At least a part of the wall portion is a liquid passage portion, and the liquid attached matter is centrifugally separated from the object to be processed by rotation and discharged to the outside from the liquid passage portion. A separation tank having a processing object discharge port for discharging the processing object after the liquid deposit is separated based on the centrifugal force due to the rotation, and a shield for opening and closing the processing object discharge port A member, a shutter for shutting off a chute passage leading to the separation tank, a workpiece supply mechanism for supplying a fixed amount of the workpiece into the rotating separation tank, and the separation tank being rotationally driven. To centrifuge the liquid deposit When the object to be processed is discharged from the separation tank after the centrifugal separation process is completed, the object to be processed is discharged while the separation tank is rotated. So that the processed material outlet is opened,
A shielding member driving mechanism for opening and closing the shielding member.

According to the structure of the centrifugal separator of the present invention,
The workpiece to which the liquid deposit such as oil has adhered is supplied by the workpiece supply mechanism into the rotating separation tank by a predetermined amount, and the separation tank continues rotating for a predetermined time in this state to separate the liquid deposit. After the discharge, the workpiece discharge port is opened in a state where the separation tank is rotationally driven by the shielding member driving mechanism, and the processed workpiece is discharged. As a result, the processing efficiency can be extremely high because the processing object can be supplied and recovered while the separation tank is driven substantially continuously, and the operation efficiency of the separation tank is significantly higher than that of a conventional centrifuge. To improve.
Further, since the discharge port of the object to be processed is closed during the centrifugal separation process, a sufficient centrifugal force can be applied to the object to be processed in the separation tank, and the separation and removal of the liquid attached matter can be reliably performed. Furthermore, during the rotation of the separation tank, open the workpiece discharge port,
Since the object to be processed is discharged by centrifugal force, the object to be processed can be discharged and collected quickly, and the mechanism is simple.

[0007] The liquid passage section may be any liquid passage section that does not allow the passage of the object to be processed and allows the passage of liquid deposits. However, for example, this may be formed as a slit or a net member.

The separation tank is formed in a bottomed cylindrical shape having an opening as a discharge port of the object to be processed on the upper surface side, and can be rotated around its own central axis. Can be formed. In this case, the inner peripheral surface of the side wall portion may be an inclined surface in which at least a part in the circumferential direction extends outward from the bottom side of the separation tank toward the opening side. According to this, the object to be processed after separating the liquid deposit is crawled up the inclined surface by centrifugal force due to rotation of the separation tank, and is discharged from the opening,
The object to be treated can be reliably and smoothly discharged from the separation tank with a simple configuration. The inner peripheral surface of the side wall portion is
The opening side can be formed in a tapered surface shape having a larger diameter than the bottom side.

The opening of the separation tank may be openably and closably closed by a lid as a shielding member provided so as to be able to approach / separate from the opening. In this case, the lid portion is rotatably coupled to the non-rotating upper plate and the lower surface side of the upper plate, and rotates integrally with the separation tank by engaging with the separation tank at the periphery of the opening. And a lower plate. Thus, a mechanism for opening and closing the opening of the rotating separation tank can be simply configured. Further, the upper plate and the lower plate each have a through-hole formed so as to include the rotation axis of the lower plate, and the workpiece supply mechanism sets the workpiece in the separation tank at the overlapping portion of the through-holes. Is supplied. According to this, the object to be processed can be smoothly supplied into the separation tank while the opening of the rotating separation tank is closed by the lid, and the supply port of the object to be processed is provided inside the opening. Since it can be formed, the entire apparatus can be configured compactly.

Further, a cylindrical member for preventing scattering of liquid deposits discharged from the liquid passage portion can be arranged outside the separation tank in the rotation radial direction so as to surround the side wall portion in the circumferential direction. . In this case, by arranging the attached matter collecting portion below the tubular member, it is possible to collect the liquid attached matter flowing down the inner wall portion of the tubular member. In this case, the liquid deposits separated from the object can be smoothly collected without being scattered.

[0011] Further, on the outer side in the radial direction of rotation of the separation tank, there can be provided a rotating plate that is arranged so that the plate surface intersects with the rotation axis of the separation tank and rotates about an axis substantially perpendicular to the plate surface. . In this case, the object to be processed discharged from the separation tank falls on the rotating plate and moves outward on the plate surface by the centrifugal force. In view of this, a barrier member is provided outside the rotary plate in the rotation radial direction so as to surround the rotary plate in the circumferential direction, and the object to be processed that has moved on the rotary plate is discharged and collected from a discharge port formed in the barrier member. By doing so, the objects to be treated will not be scattered on all sides of the separation tank,
It is possible to smoothly and reliably recover the liquid from the outlet of the barrier member.

The separation tank and the rotating plate may be driven to rotate at the same rotation speed. However, the rotation plate is provided in a form separated from the separation tank, and is driven to rotate at a lower rotation speed than the separation tank. Then, the following advantages arise. That is, in order to increase the efficiency of separating oil and the like by centrifugal force, it is preferable to set the rotational speed of the separation tank to a relatively high speed. On the other hand, since the rotating plate is arranged outside the separation tank, its outer diameter is necessarily larger than the inner diameter of the separation tank. Here, when the rotating plate is driven at the same rotation speed as the separation tank, the peripheral speed at the outer peripheral edge becomes larger than the inner peripheral velocity of the separation tank by the increase in the outer diameter. If the peripheral speed of the outer periphery of the rotating plate becomes too high, excessive centrifugal force acts on the object to be dropped, which sticks to the inner surface of the barrier member surrounding the outside of the rotating plate, and the discharge from the discharge port. Smooth discharge may be hindered. Thus, such a problem can be avoided by setting the rotation speed of the rotating plate to be lower than that of the separation tank so that an excessive centrifugal force does not act on the dropped workpiece.

[0013]

[0014]

Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. 1 and 2
It is the front view and top view which show an example of the centrifuge of this invention. The centrifugal separator 1 uses a small member such as a nut as an object to be processed, and separates and removes an adhering substance such as oil and cutting powder by centrifugal force. In the present embodiment, the workpiece is represented by a nut, but it goes without saying that bolts and other small mechanical parts can also be the workpiece of the centrifugal separator 1.

As shown in FIG. 1, a centrifugal separator 1 has a separation tank 2 having an opening 2e at an upper portion and rotatably provided around one axis, and an opening 2e (a discharge port for a workpiece). And a rotating body disposed so as to surround the separation tank 2 in the rotation circumferential direction of the separation tank 2 and rotatably provided coaxially with the separation tank 2. 4 and the like. The separation tank 2 and the rotating body 4 are covered by a cylindrical cover 40 (barrier member) from the outside, and the cover 40 is fixed to the base P1 using a mounting member T1 and a screw member B1. The upper opening of the cover 40 is closed by a disk-shaped lid 41 fixed by a mounting member T2 and a screw member B2.

As shown in FIGS. 1 and 2, a through hole 41a is formed in the center of the lid 41. As shown in FIG. 1, a slide-shaped shooter 20 is provided above the lid 41 as a workpiece supply unit. Shooter 2
The outlet 20a is disposed so as to be located in the through hole 41a, and an inlet pipe 21 is further provided so as to follow the outlet 20a. The lower end of the inlet 20a communicates with the inside of the separation tank 2 through the lid 3. . A plate 42 is fixed on the upper surface of a cover 41 provided on the cover 40 with screws B3 or the like so that the tip side projects into the opening 41a.
Is attached to the overhanging portion of the plate 42 by welding or the like.

As shown in FIG. 8A, a shutter 45 is provided above an intermediate portion of the shooter 20. The shutter 45 is vertically movable by a cylinder 46. The nut N sent from a nut manufacturing device or the like (not shown)
When the shutter 45 is lowered, the passage of the shooter 20 is shut off when the shutter 45 is lowered, as shown in FIG. Supply stops. Thereby, a fixed amount of the nut N is supplied to the separation tank 2. That is, the shutter 45, the cylinder 46, and the like constitute a workpiece supply mechanism.

The nut N is manufactured through mechanical processing such as forging or thread cutting, and its surface is wet with oil (liquid deposit) such as cutting oil. In this embodiment, the nut N continuously supplied into the shooter 20 is stored by closing the shutter 45,
While the shutter 45 is kept open for a certain period of time, the nut N is supplied to the separation tank 2 in a fixed amount. However, the supply unit of the nut N is measured in advance by the number and weight, and the supply unit of the supply unit is determined. The shutter 45 may be kept open until the supply to the separation tank 2 is completed. Further, the workpiece supply mechanism is not limited to the configuration including the shutter 45 and the cylinder 46 and the like.
Various things can be adopted.

Next, as shown in FIG.
A discharge hole 2 for discharging oil and the like separated from the nut N
Many c (liquid passage portions) are formed so as to penetrate the wall portion. Further, the inner peripheral surface 2a extends from the bottom surface 2d to the opening 2e.
Is formed in a tapered surface shape that spreads outward in the vertical direction toward. The nut N introduced into the separation tank 2 is stuck to the inner peripheral surface 2a by the centrifugal force generated by the rotation of the separation tank 2, and the attached oil and the like are separated by the centrifugal force and discharged from the discharge hole 2c. Will be discharged. In the center of the bottom surface 2d of the separation tank 2, a protrusion 2f is formed to protrude upward. The protrusion 2f prevents the nut N from stagnating near the center of the bottom surface 2d, so that centrifugal force can be more reliably applied to the nut N.

Returning to FIG. 1, the separation tank 2 is integrally attached to the upper end of the rotating shaft 5 at the center of the lower surface thereof, and is connected to the pulley 6 provided at the lower end of the rotating shaft 5 by a motor 18. A rotating shaft 7 disposed substantially parallel to and adjacent to the shaft 5, and a pulley 8 provided at a lower end of the rotating shaft 7.
And a belt 9 wound around the pulleys 6 and 8, and is driven to rotate via a transmission mechanism K. The rotating shaft 5 is disposed so as to penetrate the cylindrical case 10 in the axial direction, and at a step formed on its outer peripheral surface by bearing members E provided at the upper end and the lower end of the case 10. It is rotatably supported. The case 10 is fixed to the base P2 using a mounting member T4 and a screw member B4.

As shown in FIG. 1, the opening 2e of the separation tank 2
The lid 3 is formed by two disk-shaped plates vertically stacked. As shown in FIG. 4, the upper plate 11 is provided with a cylinder 16 via a mounting plate 12 mounted at an eccentric position on the upper surface by a screw member B and a connecting plate 13 penetrating the lid 41 at the opening 41 a. At the tip of the piston rod 14 (FIG. 1) which moves up and down
It is unrotatably connected. On the other hand, the lower plate 15 is fitted inside the opening 2 e of the separation tank 2, and rotates integrally with the separation tank 2. The outer peripheral surface 15a of the lower plate 15 has a tapered surface shape corresponding to the inner surface of the opening 2e of the separation tank 2. These upper plate 11 and lower plate 15 have through holes 11
b and 15b, which are located substantially concentrically to form one through hole 3a. As shown in FIG. 1, a lower end portion of an introduction pipe 21 is inserted into the through hole 3a, and a nut N as an object supplied through a shooter 20 from a nut manufacturing device (not shown) or the like is inserted into the introduction pipe 21. Through the separation tank 2.

Further, as shown in FIG.
A circular concave portion 11a is formed on the lower surface side of 1, and a ring-shaped convex portion 15c is formed on the upper surface of the lower plate 15 along the periphery of the through hole 15b. The ridge 15c is arranged in the recess 11a of the upper plate 11, and a ring-shaped bearing J is fitted in a gap G between the inner peripheral surface of the recess 11a and the outer peripheral surface of the ridge 15c. . Thereby, the lower plate 15 is rotatably connected to the upper plate 11 via the bearing J, and the upper plate 1 is actuated by the operation of the cylinder 16.
6 can be moved up and down integrally.

The bearing J is not press-fitted into the gap G. For example, a threaded portion is formed on the inner and outer surfaces thereof,
This may be screwed into a screw portion formed in the concave portion 11a and the convex ridge portion 15c. Also, as shown in FIG. 12, the lower plate 15 is
The lower plate 15 may be housed in the inside, and the lower plate 15 may be prevented from being pulled out by a claw or a flange-like stopper 11b provided on the periphery of the opening of the recess 11a. Stopper 11b
Is attached to the lower plate 15 by screwing or the like such that the tip enters the recess 11a. And FIG.
As shown in (b), when the lid 3 rises, the outer edge of the lower surface of the lower plate 15 engages with the stopper 11b and is prevented from being pulled out. 2 is pressed against the lower surface of the lower plate 15,
The lower plate 15 rotates with the separation tank 2 due to the friction. In order to prevent the lower plate 15 or the stopper 11b from being worn, it is desirable that the lower surface of the lower plate 15 is slightly lifted from the stopper 11b by the above-mentioned pressing so that the contact state is eliminated.

Returning to FIG. 1, the lid 3 of the separation tank 2 is in a state where the opening 2e is closed while the nut N is inserted and the separation step of oil or the like is performed, and the lower plate 15 is closed by the separation tank. When the cylinder rod 16 is rotated to remove the oil and the like, the piston rod 14 is pulled up by the cylinder 16, whereby the lid 3 is also pulled up to open the opening 2 e of the separation tank 2. As a result, the nut N is discharged so as to overflow from the opening 2e to the outside of the separation tank 2 due to the centrifugal force accompanying the rotation of the separation tank 2.

On the other hand, the oil sump 30
(Adhered matter collection unit) is provided so as not to rotate. The oil sump 30 is formed in a cylindrical shape with a bottom so as to cover the lower part of the cylindrical member 4a of the rotating body 4 from the outside, for example.
And is fixed to the base P3 using the screw member B5. Oil or the like discharged from the discharge hole 2c of the separation tank 2 is received by the inner peripheral surface of the above-described cylindrical member 4a, drips downward along the inner peripheral surface, and is stored in the oil reservoir 30. 5 and 7
As shown in FIG. 3, a through hole 30b is formed in the bottom 30a of the oil reservoir 30. The rotary shaft 5 is inserted into the through hole 30b, and an oil stopper 30c for preventing collected oil from flowing down to the rotary shaft 5 side is provided in the through hole 3b.
Ob is formed so as to be warped upward along the peripheral portion of Ob. An oil drain hole 30d is formed in an eccentric position of the bottom portion 30a in a penetrating form. To be discharged to

Next, as shown in FIGS. 1 and 5, the rotating body 4 provided outside the separation tank 2 includes a cylindrical member 4a having an inner diameter slightly larger than the outer diameter of the separation tank 2. It is provided integrally with the upper part of the outer peripheral surface of the cylindrical member 4a,
And a donut-shaped rotating plate 4b that protrudes outward along the circumferential direction. The rotating body 4 is wound by a motor 18 around a pulley 22 provided on the outer peripheral surface of the cylindrical member 4a, a rotating shaft 7, a pulley 23 provided at an upper end of the rotating shaft 7, and pulleys 22 and 23. The belt 24 is driven to rotate via a transmission mechanism L including the belt 24. A groove 25 along the circumferential direction is provided below the pulley 22 on the outer peripheral surface of the cylindrical member 4a.
A roller receiving portion 25 having a is provided. As shown in FIG. 6, rollers 26 provided at a plurality of locations (four locations in the present embodiment) are engaged with the groove 25a along the outer peripheral surface of the oil reservoir 30, thereby forming a cylindrical member. 4
a and thus the entire rotating body 4 is rotatably supported by the oil reservoir 30. Then, the nut N overflowing from the opening 2e to the outside of the separation tank 2 falls on the rotating plate 4b.

Next, as shown in FIG. 1, a discharge port 40a is formed in a lower portion of the cover 40 at a position corresponding to the rotary plate 4b. Is arranged. The nut N that has fallen on the rotating plate 4b moves outward on the rotating plate 4b by centrifugal force due to its rotation, is discharged from the discharge port 40a to the shooter 48, and is collected.

Here, the separation tank 2 and the rotating plate 4b may be driven to rotate at the same rotation speed.
The rotation speed of b is set to be lower than that of the separation tank 2. That is, the separation tank 2 is driven to rotate at a relatively high speed in order to increase the efficiency of separating oil and the like by centrifugal force. On the other hand, when the outer diameter of the rotating plate 4b is, for example, about 2 to 2.5 times the inner diameter (position of the opening 2e) of the separation tank 2, when the rotating plate 4b is driven at the same rotation speed as the separation tank 2, The peripheral speed at the outer peripheral edge is a very large value of 2 to 2.5 times that of the separation tank 2. For this reason, excessive centrifugal force acts on the dropped nut N and sticks to the inner surface of the cover 40,
This may hinder smooth discharge from the discharge port 40a.

Therefore, as in the present embodiment, it is effective to make the rotation speed of the rotary plate 4b smaller than that of the separation tank 23 so that an excessive centrifugal force does not act on the dropped nut N. In addition, the rotation speed of the separation tank 2 and the rotating plate 4b can be appropriately set to a preferable value according to the weight, the number, and the like of the nuts N to be processed.

Various methods of driving the separation tank 2 and the rotating plate 4b at different rotational speeds are conceivable. For example, the motor 18 is used as a common driving source and the rotation is separated via speed reduction mechanisms having different reduction ratios. It is possible to adopt a method of transmitting the signal to the tank 2 and the rotating plate 4b. In this embodiment, the rotation shaft 7 driven by the motor 18 is used as a common drive shaft, and the pulley 8 (rotation diameter D1), the belt 9 and the pulley 6 (rotation diameter D2) are separated from the separation tank 2 by a first reduction mechanism. And a pulley 23 (rotational diameter D3) for the rotating plate 4b,
The rotation of the rotating shaft 7 is transmitted by using the belt 24 and the pulley 22 (rotation diameter D4) as a second reduction mechanism. Then, the diameter ratio D1 / D2 of the pulleys 8 and 6 of the first reduction mechanism (that is, the reduction ratio) is set to be smaller than the diameter ratio D1 / D2 of the pulleys 23 and 22 of the second reduction mechanism. It is driven at a lower rotational speed than the separation tank 2.

FIG. 13 is a block diagram showing the electrical configuration of the control unit of the centrifuge 1. That is, the control unit:
It mainly includes a microprocessor 50 including a CPU 50a, a ROM 50b, and a RAM 50c. Then, the cylinder 16 for raising and lowering the lid 3 is moved via the cylinder driving unit 51 to the cylinder 4 for raising and lowering the shutter 45.
6 is connected to the microprocessor 50 via a cylinder driving unit 52, and the motor 18 is connected to the microprocessor 50 via a motor driver 53. Then, the CPU 50a of the microprocessor 50 uses the control program stored in the ROM 50b to set the RAM 50c as a work area.
In order to realize the function of the centrifuge 1 described below,
It controls each operation of the cylinder 16, the cylinder 46, and the motor 18. Note that the respective operation timings are determined with reference to the clock pulse signal from the clock circuit 54.

Hereinafter, the operation of the centrifuge 1 will be described. As shown in FIG. 1, first, the opening 3 e of the separation tank 2 is closed with the lid 3 at the lowered position. Further, the shutter 45 is also set at the lowered position, and the shooter 20 is closed. In this state, the motor 18 is started, and the rotation of the separation tank 2 and the rotating body 4 is started. The nut N is continuously supplied to the shooter 20 from a nut manufacturing device or the like (not shown), and the nut N is stored upstream of the shutter 45. When the rotation of the motor 18 is in a steady state, the shutter 45 is raised for a predetermined time, and a predetermined amount of nut N
Is supplied to the separation tank 2 through the introduction pipe 21, and then the supply of the nut N is stopped by setting the shutter 45 to the lowered position again.

As shown in FIG. 9, the rotating separation tank 2
The inner nut N is pressed against the inner peripheral surface 2a side of the separation tank 2 by centrifugal force. As a result, oil and the like attached to the nut N are removed by centrifugal force and discharged from the discharge hole 2c. The discharged oil or the like is received on the inner peripheral surface of the cylindrical member 4 a of the rotating body 4, drips downward along the inner peripheral surface, and is stored in the oil reservoir 30. The oil or the like accumulated in the oil reservoir 30 is discharged to a predetermined place outside the centrifugal separator 1 through a hose H provided on the bottom 30a. The lid 3
The lower plate 15 of FIG. 4 rotates in a manner to rotate with the opening 2 e of the separation tank 2.

After the introduction of the nut N, the rotation of the separation tank 2 continues for a predetermined time until the separation of oil or the like sufficiently proceeds. And
When the rotation duration time expires, the rotation of the separation tank 2 is temporarily stopped (or decelerated). This is because the nut N is stuck to the inner peripheral surface 2a of the separation tank 2 due to strong centrifugal force in the steady rotation state, and the nut N may not be discharged from the separation tank 2 even when the lid 3 is opened. is there.
Therefore, the centrifugal force is reduced by temporarily stopping or decelerating the separation tank 2 as described above, and the sticking state of the nut N is temporarily eliminated. Thereafter, as shown in FIG. 10, when the separation tank 2 is rotated again and the lid 3 is opened by the cylinder 16, the nut N crawls up the inner peripheral surface 2a of the separation tank 2 by a new centrifugal force, and further opens. It is discharged outside from 2e. Here, since the inner peripheral surface 2a of the separation tank 2 is an outwardly tapered surface, the nut N can be smoothly discharged.

For example, when the rotation axis of the separation tank 2 is substantially vertical, in order to discharge the nut N from the separation tank 2 without hindrance, the angle between the generatrix of the inner peripheral surface 2a and the vertical line must be set. It is desirable to set it to 10 ° or more. on the other hand,
When the angle is 25 ° or more, depending on the size of the nut N, it may bite into an acute gap between the lower surface of the lid 3 (the lower plate 15) and the upper edge of the inner peripheral surface of the separation tank 2. Therefore, it can be said that it is desirable to set the angle to a value of 15 ° or less. The angle is more desirably set in the range of 15 to 20 degrees.

As shown in FIG. 11, the nut N discharged from the separation tank 2 falls on the upper surface of the rotating plate 4b of the rotating body 4 and is applied to the inner peripheral surface of the cover 40 by centrifugal force generated by the rotation. And is further discharged from the nut discharge port 40a to the shooter 48 and collected.

When all the nuts N are discharged from the separation tank 2, the lid 3 is lowered by the cylinder 16 to close the opening 2e of the separation tank 2, and the shutter 45 is opened to renew the nut N. Charge into the separation tank 2. Thereafter, the same processing as described above is repeated.

The lid 3 may have a single non-rotating structure. In this case, for example, a predetermined amount of gap is formed between the lid 3 and the separation tank 2 so as not to interfere with the rotating separation tank 2 and to prevent leakage of the object to be processed therein. It should just be arranged in the form. In this case, the structure of the lid 3 can be made simpler. On the other hand, if it is conceivable that an object to be processed may bite into the gap due to the size of the member to be processed, the lid 3 may have a double structure as shown in FIG. It can be said that it is more desirable that no gap is formed.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a centrifuge according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a perspective view and a front sectional view of a separation tank.

FIG. 4 is a plan view and a front cross-sectional view of a lid for closing a separation tank.

FIG. 5 is a front sectional view showing a main part of FIG. 1;

FIG. 6 is a sectional view taken along the line AA of FIG. 5;

FIG. 7 is a sectional view taken along line BB of FIG. 5;

FIG. 8 is an explanatory view of an operation process of the centrifuge of FIG. 1;

FIG. 9 is an explanatory view of an operation step following FIG. 8;

FIG. 10 is an explanatory view of an operation step following FIG. 9;

FIG. 11 is an explanatory view of an operation step following FIG. 10;

FIG. 12 is an explanatory view showing a modification of the lid.

FIG. 13 is a block diagram showing an electrical configuration of a control unit of the centrifuge shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Centrifugal separator 2 Separation tank 2c Discharge port (liquid passage part) 2e Opening part (treatment object discharge port) 3 Lid (shielding member) 3a Through hole 4 Rotating body 4a Cylindrical member 4b Rotating plate 5 Rotating shaft 11 Upper plate 11b Through hole 18 Motor 15 Lower plate 15a Peripheral edge 15b Through hole 16 Cylinder (shielding member driving mechanism) 30 Oil reservoir (adhered matter collecting unit) 40 Cover (barrier member) 40a Discharge port 45 Shutter (substrate supply mechanism) 46 Cylinder (workpiece supply mechanism) N Nut (workpiece)

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B04B 3/00

Claims (7)

(57) [Claims] 1. A centrifugal separator for separating small objects such as nuts and bolts from an object to be processed by using a centrifugal force to separate liquid adhering substances such as oil from the object. Is rotated around a predetermined axis, the inside is a space for accommodating the object to be processed, and at least a part of a wall portion is a liquid passage portion, and the liquid adhered substance is centrifugally separated from the object by rotation. The liquid is then discharged to the outside from the liquid passage portion, and further, the processing target after the liquid deposit is separated is discharged based on the centrifugal force of the rotation. A separation tank having an outlet; a shielding member that opens and closes the workpiece discharge port; and a shutter that shuts off a chute passage leading to the separation tank.
An object supply mechanism that supplies a constant amount of the object to be processed into the rotating separation tank, and the separation tank is driven to rotate to perform the centrifugal separation of the liquid deposit. When the object discharge port is closed and the object to be processed is discharged from the separation tank after completion of the centrifugal separation process, the object discharge port is rotated in a state where the separation tank is driven to rotate. A centrifugal separator comprising: a shielding member drive mechanism that opens and closes the shielding member so as to be opened. 2. The separation tank is formed in a bottomed cylindrical shape having an opening on the upper surface side as the workpiece discharge port, and rotates around a central axis of the separation tank. An inner peripheral surface of the side wall portion is formed on the side wall portion, and at least a part of the inner peripheral surface in the circumferential direction has an inclined surface that extends outward from the bottom side of the separation tank toward the opening side. 2. The centrifugal separator according to claim 1, wherein the object to be processed creeps up on the inclined surface by the centrifugal force as the separation tank rotates, and is discharged from the opening. 3. An object to be treated is a small member such as a nut or a bolt.
Liquids such as oil adhering to the object to be treated
Centrifuge for separating from the object by heart
There, it is driven to rotate around a predetermined axis, and the inside is
A space is provided and at least part of the wall is
Is a part, the liquid-like deposits from the processing object by rotation
Centrifuged and discharged from the liquid passage to the outside.
After the liquid deposit is separated
Is discharged based on the centrifugal force of the rotation.
A separation tank having an object discharge port to be discharged, a shielding member that opens and closes the object discharge port , and a predetermined amount of the object to be supplied into the rotating separation tank.
And a centrifugal separation of the liquid deposits by rotating the separation tank.
When performing processing, the discharge port for the object to be processed is closed and
After the completion of the core separation process, the object is separated into the separation tank.
When the separation tank is rotated
The shielding member is opened so that the processing object discharge port is opened.
And a shielding member driving mechanism for opening and closing the opening.
Formed in a bottomed cylindrical shape with a mouth, around its own central axis
The liquid passage portion is formed on the side wall portion.
And at least one inner circumferential surface of the side wall portion in the circumferential direction.
Area is directed from the bottom side of the separation tank to the opening side.
And the separation tank is turned outward.
By rotating, the object to be processed is
Crawl up the slope so that it is discharged from the opening
The opening of the separation tank is closed and opened by a lid as the shielding member provided so as to be able to approach and separate from the opening, and the lid is non-rotatable. An upper plate, and a lower plate rotatably coupled to a lower surface side of the upper plate and engaging with the separation tank at the periphery of the opening to rotate integrally with the separation tank. The plate and the lower plate are each formed with a through-hole so as to include the rotation axis of the lower plate, and the workpiece supply mechanism is configured to place the workpiece in the separation tank at an overlapping portion of the through-holes. A centrifugal separator characterized in that the centrifugal separator is supplied . 4. A cylindrical member is disposed outside the separation tank in the radial direction of rotation so as to surround the side wall portion in the circumferential direction and prevents scattering of liquid deposits discharged from the liquid passage portion, 4. The centrifuge according to claim 2, wherein an attached matter collecting section is disposed below the tubular member to collect liquid attached matter flowing down an inner wall of the tubular member. 5. A rotary plate is provided outside the separation tank in the radial direction of rotation so that the plate surface intersects with the rotation axis of the separation tank and rotates about an axis substantially perpendicular to the plate surface. The object to be processed discharged from the separation tank falls on the rotating plate, and moves outward on the plate surface by the centrifugal force. Further, the rotating radius of the rotating plate 5. A barrier member is provided on the outer side in a direction surrounding the barrier member in a circumferential direction, and an object to be processed, which has moved on the rotary plate, is discharged and collected from a discharge port formed in the barrier member. The centrifuge according to any one of the above. 6. The centrifuge according to claim 5, wherein the rotary plate is provided in a form separated from the separation tank, and is driven to rotate at a lower rotation speed than the separation tank. Separator. 7. When the object to be processed in the separation tank is discharged from the object discharge port, the rotation of the separation tank is stopped for a predetermined time while the object discharge port is closed by the shielding member. The centrifugal separator according to any one of claims 1 to 6, wherein the centrifugal separator is configured to decelerate and then restart or accelerate the rotation of the separation tank to open the workpiece discharge port.