JPH09253533A - Centrifuge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of centrifugation by changing the direction and strength of centrifugal force applied to solid matter such as casting workpieces and to stop a rotary vessel in a prescribed place and position in order to automatically bring in and carry out a rotary drum of a basket. SOLUTION: In this device, a vessel supporting axis 60 is freely rotatably arranged in a place away from the center of rotation of a turntable 50 by an eccentric distance. A rotary vessel 65 is connected to the upper end of the vessel supporting axis 60, and a main axis 20 is supported on the same axis line as the center axis of the turntable 50, and the upper end of the main axis 20 is connected to the turntable 50. The rotary vessel 65 is rotated around the center of rotation of the turntable 50, and also it is rotated around the vessel supporting axis 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifuge for dehydrating a liquid contained in a gap between solids, for example, a centrifuge for separating and recovering an impregnating liquid adhering to a casting work after immersion of the impregnating liquid. Separation device

[0002]

2. Description of the Related Art In a process of treating an impregnating liquid, a basket containing a casting work after the impregnating liquid is immersed in a rotating container of a centrifuge by operating a hoist, and the rotating container is rotated to separate and dehydrate the impregnating liquid. And collect. Then, after dehydration, the basket containing the casting work was taken out from the rotary container by operating the hoist and sent to the next cleaning step. The conventional centrifuge has a drawback that the centrifugal force always acts outward in the radial direction of the rotary container, and the centrifugal force that acts on the work near the center of rotation is small. Therefore, for example, among the liquids in the casting work, those that easily flow outward in the radial direction are dehydrated, but the liquids that easily flow in the rotation direction are difficult to dehydrate. Further, a large centrifugal force acts on the liquid in the rotary container away from the rotation center to easily dehydrate, but a small centrifugal force acts on the liquid placed near the rotation center, which makes dehydration difficult. is there. Moreover, it was inefficient because it relied on a hoist operated by humans to transport the basket.

[0003]

SUMMARY OF THE INVENTION The present invention improves the efficiency of centrifugal separation by changing the direction and magnitude of the centrifugal force acting on a solid such as a cast work, and also for carrying a basket into a rotating container. An object of the present invention is to stop a rotating container at a predetermined position and posture in order to automate unloading.

[0004]

According to the present invention, in order to achieve the above object, in a centrifuge, a container support shaft is rotatably disposed at a position separated by an eccentric distance from a rotation center of a rotating table. A rotating container is connected to the upper end of the container support shaft,
The main shaft is supported coaxially with the center axis of the rotary table, and the upper end of the main shaft is connected to the rotary table, and the rotary container rotates around the rotation center of the rotary table and rotates about the container support axis. This is the first configuration. The present invention
In the first configuration, the main shaft is a hollow shaft, the brake shaft is inserted into the central vertical hole of the main shaft, the brake device is disposed at the lower end of the brake shaft, and the reducer body of the speed reducer is provided at the rotary table or the upper end of the main shaft. It is fixed so that the braking force of the brake device can be transmitted to the drive shaft of the reducer by the brake shaft, the driven shaft of the reducer is connected to the container support shaft by the transmission device, and the main shaft is connected to the output shaft of the main motor by the transmission device. A second configuration is that the container support shaft is decelerated according to the reduction ratio of the speed reducer and is rotated when the main shaft is rotated by stopping the rotation of the brake shaft by the brake device. In the second configuration, the tip of the brake shaft may be the driving shaft of the speed reducer, or the tip of the brake shaft and the driving shaft of the speed reducer may be interlocked. In the first configuration or the second configuration, the present invention is such that the lower end of the container support shaft is projected to the lower side of the turntable, and the container support shaft is a hollow shaft in the central vertical hole of the container support shaft. An exhaust passage is formed by the recovery pipe, the upper end of the exhaust passage communicates with the bottom opening of the rotating container, and an annular recovery groove is arranged below the container support shaft so that the lower end of the exhaust passage always faces the annular recovery groove. It is a third configuration that is set. In the third configuration, the central vertical hole of the container support shaft may be the discharge passage, or the recovery pipe in the central vertical hole may be the discharge passage. According to the present invention, in one of the first to third configurations, an annular guide frame is arranged in the vicinity of the outer periphery of the turntable, and the first support roller and the second support are provided at both ends in the longitudinal direction of the turntable. A fourth configuration is that the rollers are rotatably connected, the first support roller is close to one surface of the guide frame, and the second support roller is close to the other surface of the guide frame. In the fourth configuration, the first supporting roller and the second supporting roller may be brought close to the side surface of the guide frame from both sides, or the first supporting roller and the second supporting roller may be arranged vertically on the horizontal plane of the guide frame. You may make it close. The present invention provides one of the first to fourth configurations.
In this case, when the rotary table is stopped at a predetermined position by stopping the main shaft at a predetermined angular position, the container support shaft is stopped at a predetermined angular position so that the container is stopped at the predetermined position. This is referred to as the fifth configuration.
According to a fifth aspect of the present invention, in the fifth configuration, a spindle lock wheel having an engagement recess formed on the outer periphery is coupled to a spindle, and a first roller follower is supported at a position opposite to the spindle lock wheel so as to be movable in the horizontal direction. A support shaft lock wheel having an engaging recess is coupled to a container support shaft, a second roller follower is supported at a position facing the support shaft lock wheel so as to be horizontally movable, and the first roller follower is rotated when the main shaft rotates at a low speed. Is pressed against the outer circumference of the main spindle lock wheel, and the first roller follower engages with the engaging recess of the main spindle lock wheel at a predetermined angular position of the main spindle to stop the rotation of the main spindle. The follower is pressed against the outer periphery of the support shaft lock wheel, and the second roller follower engages with the engaging recess of the support shaft lock wheel at a predetermined angular position of the container support shaft to support the container. The sixth configuration that rotation of the is to stop. According to the sixth aspect of the present invention, when the first roller follower engages with the engaging recess of the main shaft lock wheel at a predetermined angular position of the main shaft and rotation of the main shaft is stopped, braking of the brake device is released. The brake shaft is made rotatable, the container support shaft is connected to the output shaft of the auxiliary motor by a transmission device, the rotation stop by the brake device is released, and the container support shaft is rotated at a low speed. And

[0005]

1 to 7 show an embodiment of a centrifugal separator according to the present invention. As shown in FIG. 1, a plurality of vertical frames 16
A plurality of upper end horizontal frames 12 are arranged at the upper end of the upper end of the upper end of the upper end of the upper end horizontal frame 12, and the upper surface of the upper end horizontal frame 12 is covered with a cover plate 12A except for an opening 17. Opening
A movable door 18 is disposed on the upper part of 17 so as to be movable left and right, and the movable door 18 is opened when an object (cast work) is loaded into or unloaded from a rotary container (centrifugal tank) 65. As shown in FIGS. 1 and 2, a horizontal base plate 11 is arranged in a lower portion of the entire apparatus, and a cylindrical main shaft base 21 is arranged in an upper portion of an opening of the base plate 11 located in a central portion of the entire apparatus in a top view. The main shaft base 21 is connected to the base plate 11 with bolts. The lower surface of the upper flange portion of the main spindle 20 is rotatably supported in the annular groove at the upper end of the main spindle base 21 via the first thrust bearing 30, and the inner surface of the upper end of the main spindle base 21 is interposed by the first needle bearings 34 of the main spindle 20. The outer circumference of the upper part is rotatably supported. Further, the lower portion outer periphery of the main spindle 20 is rotatably supported on the inner surface of the lower end of the main spindle base 21 via a second needle bearing 35.

As shown in FIGS. 1, 2 and 4 (a), the central portion of the floor frame 53 of the rotary table 50, which is substantially rectangular in plan view, is attached to the upper flange portion of the main shaft 20, and Frame 53
The upper flange portion of the main shaft 20 is connected with a bolt. The rotary table 50 is formed in a substantially box shape by members such as a floor frame 53 at the lower end, a first rotary frame 51 / a second rotary frame 52 at the upper end, and a plurality of vertical frames 57. The arcuate ends of the first rotating frame 51 and the second rotating frame 52 are located at the ends of the rotary table 50 in the longitudinal direction. Two upper support rollers (first support rollers) 54A and one lower support roller (second support rollers) 55A are rotatably provided below the arcuate end of the first rotating frame 51 via brackets. Similarly, two upper supporting rollers (first supporting rollers) 54B and one lower supporting roller (second supporting rollers) 54B are supported below the arcuate end of the second rotating frame 52 via brackets. 55B is rotatably supported. An annular guide frame 13 having an annular horizontal portion is arranged at an outer peripheral position of the rotary table 50 via a cylindrical support frame 14. The outer peripheral surfaces of the upper support rollers 54A and 54B are in close contact with the upper surface of the annular guide frame 13 and lightly contact each other, so that the lower support rollers 55A and 55B.
Is arranged so as to come into contact with the lower surface of the annular guide frame 13 and lightly contact it. As described above, the rotary table 50 is mainly supported by the main shaft base 21, the first thrust bearing 30 and the main shaft 20, and the support by the upper support rollers 54A and 54B and the lower support rollers 55A and 55B is supplementary for ensuring safety. It is something to support. The annular guide frame 13
It is possible to provide an annular vertical portion on the first and second sides of the annular vertical portion so that the first support roller and the second support roller are close to each other.

At the opening of the second rotary frame 52 of the rotary base 50,
The container support shaft base 61 is fitted from above, and the second rotating frame 52 and the container support shaft base 61 are connected by bolts. The lower surface of the upper flange portion 63 of the container support shaft (rotating shaft) 60 is rotatably supported in the annular groove at the upper end of the container support shaft base 61 via the third thrust bearing 32, and is attached to the inner surface of the upper end of the container support shaft base 61. The upper outer circumference of the container support shaft 60 is rotatably supported via the third needle bearing 36.
Further, a pillow block 62 is fitted from above into an opening of the floor frame 53 of the rotary table 50, which is on the same axis as the container support shaft 60, and the floor frame 53 and the pillow block 62 are joined by bolts. . On the inner surface of the pillow block 62, there is a tubular portion rotatably supported by a radial bearing, and this tubular portion is fitted to the lower portion of the container support shaft 60 to rotatably support the container support shaft 60. There is. The distance between the center of rotation of the turntable 50 (corresponding to the axis of the main shaft 20) and the axis of the container support shaft 60 is the eccentric distance. Further, the balance weight 56 is arranged so that the axis of the balance weight 56 is located at a position symmetrical with respect to the axis of the container support shaft 60 with respect to the rotation center of the turntable 50.
Is attached to the turntable 50, and the balance weight 56 is connected to the floor frame 53 and the first turn frame 51 by bolts. The balance weight 56 smoothes the rotation of the turntable 50 and counters the weight of the rotary container 65 described later.

A bottom opening 67 is formed at the center of the bottom 66 of a bottomed cylindrical rotary container (centrifugal tank) 65, and a substantially disk-shaped attachment with a larger diameter than the bottom opening 67 is formed at the center of the lower surface of the bottom 66. Auxiliary plate 68
Are joined by welding. The upper flange portion 63 of the container support shaft 60 is fitted into the recess on the lower surface of the mounting auxiliary plate 68, and the mounting auxiliary plate 68 and the upper flange portion 63 are joined together by bolts. A funnel-shaped recess opening to the upper surface is formed in the center of the attachment support plate 68, a discharge communication passage is formed below the recess, and an internal thread is formed on the inner surface of the discharge communication passage. The male screw at the upper end of the recovery pipe 69 is screwed into this female screw, the recovery pipe 69 is inserted through the central vertical hole of the hollow container support shaft 60, and the lower end of the recovery pipe 69 projects below the container support shaft 60. ing. The inside of the recovery pipe 69 functions as a drainage passage for the dehydrated liquid, and the drainage passage communicates with the bottom opening 67 of the rotary container 65 via the funnel-shaped recess of the attachment auxiliary plate 68. It should be noted that the recovery pipe 69 may be omitted and the discharge communication passage and the central vertical hole of the container support shaft 60 may be used as the discharge passage.

As shown in FIGS. 1 and 5, inside the rotary container 65 having an open upper portion, a basket 72 containing a casting work (solid to be dehydrated) immersed in the impregnating liquid can be easily carried in and fixed. It is configured to be easy to do. Support rods 73 project from both ends of the rectangular parallelepiped basket 72 in the longitudinal direction. Two lock devices 77 at the front and rear of the rotating container 65
5, the locking device 77 has clamping levers 78A and 78B for clamping the support rod 73, and the clamping levers 78A and 78B rotatably supported are shown in FIG. It is maintained in the closed position shown. Clamping lever 78
A support frame 81 having contact rods 79A and 79B fixed thereto is arranged on both sides of A and 78B so as to be vertically movable, and the support frame 81 is a spring.
80 is biased to the upper position. When the rotating container 65 is stopped at a predetermined position, along the upper rail (not shown),
The basket 72 is moved right above the rotary container 65, and the basket 72 is lowered by an elevating device.
Each side surface of the basket 72 is guided by the lower guides 75A and 75B, and the support rod 73 of the basket 72 holds the holding lever 78A.
And descend towards 78B. Support rod 73 is clamp lever 78
When approaching A and 78B, the engaging piece of the lifting device will come into contact with the contact rod 79.
Engage with the upper ends of A and 79B, and lower the contact rods 79A and 79B together with the roller and the support frame 81. As the support frame 81 and the rollers descend, the lower side surfaces of the holding levers 78A and 78B are moved inward, the upper portions of the holding levers 78A and 78B are opened, and the support rod 73 reaches the upper opening portions of the holding levers 78A and 78B. Then open the lock mechanism of the lifting device and
When 72 is separated and the lifting device is lifted, the engaging piece of the lifting device is lifted, the support frame 81 and the roller are also lifted by the biasing force of the spring 80, and the upper portions of the holding levers 78A and 78B are closed to support bar 73. And the basket 72 is fixed in the rotary container 65. After dehydration by the centrifuge, the rotary container 65 is stopped at the same position as when the basket 72 was loaded, the lock device 77 is opened by the elevating device, the elevating device grips the support shaft 73, and the lock device 77 is opened. Basket in open state
Raise 72 and carry it out.

An annular recovery groove (annular recovery gutter) 71 having a substantially U-shaped cross section is provided on the upper surface of the base plate 11 just below the rotational recovery motion of the recovery pipe 69, and the lower end of the recovery pipe 69 is always annular. It is arranged so as to face the recovery groove 71 and be located inside the annular recovery groove 71. The annular recovery groove 71 is arranged so as to be inclined vertically, and the lower portion of the lower part (the left side in FIG. 1) of the annular recovery groove 71 is connected to the recovery tank via a pipe (not shown). During dehydration by operating the centrifugal separator, the dehydrated liquid is pressed against the tubular portion of the rotary container 65 by centrifugal force. When the centrifuge is stopped, the centrifugal force ceases to act, and the dehydrated liquid flows into the annular recovery groove 71 through the discharge passage in the recovery pipe 69 and flows into the recovery tank via a pipe (not shown).

As shown in FIGS. 1 and 2, a spindle lock wheel 22 and a spindle pulley 23 are fitted to the spindle 20 from the lower side, and an annular groove on the lower surface of the spindle base 21 and the spindle lock wheel are engaged.
A second thrust bearing 31 is arranged between the upper surface of 22 and the upper surface of 22. A key is interposed between the inner surfaces of the main shaft lock wheel 22 and the main shaft pulley 23 and the outer surface of the main shaft 20, and the main shaft lock wheel 22 and the main shaft pulley 23 rotate integrally with the main shaft 20.
The first holder 25 is connected to the lower surface of the base plate 11 with bolts, and the head side of the first air cylinder 26 is swingably connected to the side surface of the first holder 25. First air cylinder 26
A first roller follower 28 is rotatably connected to the tip of the first piston rod 27 via an end 29 of a main shaft lock arm. On the outer circumference of the spindle lock wheel 22,
One engaging recess 22A for locking (see FIG. 4 (b)) is formed, and the first roller follower 28 is a spindle lock wheel.
It is moved in the horizontal direction so as to be located at the opposite position on the outer circumference of 22. When stopping the main shaft 20 at a predetermined angular position, the main shaft 20 is rotated at a low speed, compressed air is supplied to the head side of the first air cylinder 26, and the first roller follower 28 is pressed against the outer peripheral surface of the main shaft lock wheel 22. Let When the first roller follower 28 engages with the engaging recess 22A on the outer periphery of the main shaft lock wheel 22, the inertial force of the rotary container 65 or the like can be endured, and the rotation of the main shaft 20 can be stopped while maintaining the engagement state. One end 29 of the main shaft lock arm is swingably connected to the tip of the first piston rod 27. The main shaft lock arm is arranged at a position intersecting the first piston rod 27 at a right angle, and the other end of the main shaft lock arm is swingably connected to a lock arm holder (not shown), and the lock arm holder is connected to the lower surface of the base plate 11. ing.

The main shaft 20 is connected to a main motor 37 by a power transmission device for transmitting power. In the embodiment of the present invention,
The main shaft pulley 23 and the main motor pulley 24 are connected by two V belts, and the main motor pulley 24 is an output shaft of the main motor 37.
Mated and bonded to 38. The brake shaft 40 is inserted into the central vertical hole of the hollow main shaft 20, and the brake shaft 40 is rotatably supported by the upper and lower ends of the central vertical hole of the main shaft 20 via bearings. The lower end of the brake shaft 40 projects below the lower end of the main shaft 20, and the lower end of the brake shaft 40 is connected to the rotating body of the electromagnetic brake (brake device) 41.
The body of 41 is fixed to the upper surface of the brake base plate 10. Brake base plate 10 is base plate 11
When the electromagnetic brake 41 is actuated, a braking force is generated and the rotation of the brake shaft 40 is stopped and stopped.

The center portion of the floor frame 53 of the turntable 50 is mounted on the upper flange portion of the main shaft 20, but an opening is formed in the center portion of the floor frame 53, and the reduction gear 44 is mounted in the opening. ing. The reducer main body (housing) 44A is connected to the upper flange portion of the main shaft 20 by a bolt, the upper end of the brake shaft 40 is inserted into the reducer main body 44A, and the upper end of the brake shaft 40 serves as the driving shaft of the reducer 44. ing. Decelerator
The upper part of the driven shaft 45 protrudes above the 44, and the driven shaft 45
A drive chain gear (drive side chain sprocket) 46 is fitted in the drive shaft 45, and the driven shaft 45 and the drive chain gear 46 are connected by a key. A driven chain gear (driven side chain sprocket) 47 is fitted in the vertical center of the container support shaft 60, and these are also connected by a key. A chain 48 is wound around the drive chain gear 46 and the driven chain gear 47, and power is transmitted by the chain 48. The reduction ratio of the reduction gear 44 is, for example, 200: 1, and when the driving shaft makes 200 rotations, the driven shaft 45 makes one rotation. In reality, the brake shaft 40 (driving shaft) stops and the reducer main body 44A rotates, so that the reducer 44
Input. The speed reducer main body 44A may be coupled to the floor frame 53 of the turntable 50, or the brake shaft 40 and the driving shaft may be coupled separately. In addition, it is desirable to dispose a tension pulley in order to give an appropriate tension to the chain 48.

As shown in FIGS. 1, 3 and 4 (c), a support shaft lock wheel 82 and a support shaft sprocket 83 are fitted and coupled to the lower end of the container support shaft 60 from below.
The support shaft lock wheel 82 and the support shaft sprocket 83 rotate integrally with the container support shaft 60. Support shaft lock wheel
Although the support shaft sprocket 82 and the support shaft sprocket 83 may be directly connected to the container support shaft 60, the support shaft lock wheel 82 is fitted and fixed to the container support shaft 60 in this embodiment, and the support shaft lock wheel 82 has a small diameter. A support shaft sprocket 83 is fitted to the portion 82B, and the support shaft sprocket 83 is connected to the support shaft lock wheel 82 by bolts. A single engagement recess 82A for locking is formed on the outer periphery of the flange-shaped large-diameter portion of the support shaft lock wheel 82.
Similar to the engaging recess 22A, the second roller follower 84 engages with the engaging recess 82A to lock the container support shaft 60 at a predetermined position.

As shown in FIGS. 3 and 6, a vertical rotating shaft 90 is rotatably supported on the base plate 11, and a rocking plate 91 is provided at a predetermined height position of the rotating shaft 90 via a bearing. And is swingably supported. The drive sprocket 92 is fitted to the rotary shaft 90 at a position above the base end of the oscillating plate 91.
The drive sprocket 92 and the rotary shaft 90 are connected by a key. The idler shaft 94 is fitted into the through hole at the tip of the oscillating plate 91 from below, and the driven sprocket (idler sprocket) 93 is rotatably fitted to the idler shaft 94 from above the oscillating plate 91. The nut 93 is prevented from coming off from the idler shaft 94 by a nut. A chain 95 is wound around the drive sprocket 92 and the driven sprocket 93, and the rotary shaft 90 is connected to a sub motor (not shown) by a transmission device (not shown). When the sub motor is rotated, the rotational force is transmitted to the drive sprocket 92 via the rotary shaft 90, and the chain 95 makes a rotary motion.

The second holder 85 is connected to the upper surface of the base plate 11 with bolts, the head side of the second air cylinder 86 is swingably connected to the upper portion of the side surface of the second holder 85, and the second holder 85 is attached to the lower portion of the side surface of the second holder 85. 3 The head side of the air cylinder 98 is swingably connected. A connecting piece on the lower side of the tip of the swing plate 91.
One end of 96 is fixed by welding, and the other end of the connecting piece 96 is swingably connected to the tip of the third piston rod 99 of the third air cylinder 98. The drive sprocket 92, the driven sprocket 93, and the chain 95 are located on the same plane as the support shaft sprocket 83, and when compressed air is supplied to the head side of the third air cylinder 98 and the third piston rod 99 extends, it swings. The moving plate 91 swings around the rotation shaft 90, and the chain 95 engages with the support shaft sprocket 83. When the auxiliary motor is rotated in this state, the power of the auxiliary motor is generated by the rotating shaft 90, the drive sprocket 92, the chain 95, and the support shaft sprocket 8
3. The rotary container 65 is rotated by being transmitted to the rotary container 65 via the container support shaft 60.

Second piston rod of the second air cylinder 86
A second roller follower 84 is rotatably connected to the tip of 87 via one end 88 of a support shaft lock arm. The second roller follower 84 is horizontally moved so as to be located at a position opposite to the outer circumference of the flange-shaped large diameter portion of the support shaft lock wheel 82. When the container support shaft 60 is stopped at a predetermined angular position, the electromagnetic brake 41 is deactivated to make the brake shaft 40 rotatable, the chain 95 is engaged with the support shaft sprocket 83 as described above, and the container is driven by the auxiliary motor. The support shaft 60 is rotated at a low speed. Next or at the same time, compressed air is supplied to the head side of the second air cylinder 86 to press the second roller follower 84 against the outer peripheral surface of the support shaft lock wheel 82. The second roller follower 84 is the support shaft lock wheel 82.
When it engages with the engagement recess 82A on the outer periphery of the second piston rod 87, it can withstand the inertial force of the rotary container 65 and maintain the engaged state to stop the rotation of the container support shaft 60. One end 88 of the support shaft lock arm is swingably connected. The support shaft lock arm is arranged at a position intersecting the second piston rod 87 at a right angle, and the other end of the support shaft lock arm is swingably connected to a lock arm holder (not shown), and the lock arm holder is the upper surface of the base plate 11. Are linked to.

The operation of the embodiment of the present invention will be described. The centrifuge is automatically operated by the controller, and when the centrifuge is normally sequence-controlled, the rotary container 65 is stopped at a predetermined position. The basket containing the casting work after the immersion of the impregnating liquid is suspended by the elevating device and moved along the upper rail to reach the upper portion of the opening 17. The moving door 18 is opened and the basket is lifted by the lifting device.
72 is lowered in a predetermined posture, the basket 72 is guided as described above, and the support rod 73 of the basket 72 is clamped by the clamping levers 78A and 78B of the lock device 77.
72 is fixed in the rotary container 65. Next, the lifting device separates the basket 72 and lifts it, and the moving door 18 is closed.

The electromagnetic brake 41 is operated to activate the brake shaft 40.
When the rotation of the main motor 37 is stopped and the main motor 37 is rotated at a high speed, the power is transmitted from the main motor 37 to the rotary base 50 via the main motor pulley 24, the V belt, the main shaft pulley 23 and the main shaft 20. Due to the rotation of the rotary table 50, the rotary container 65 supported at a position away from the center of rotation by an eccentric distance moves at a high speed along a circumference having a radius of the eccentric distance (for example, an acceleration of 10 G is applied to a casting work). Is rotated. The rotational force reduced by the speed reducer 44 is transmitted to the container support shaft 60 via the drive chain gear 46, the chain 48 and the driven chain gear 47, and the rotary container 65.
Slowly rotates (rotates) around the container support shaft 60 as the center of rotation.

As described above, the rotary container 65 rotates along the circumference having the radius of the eccentric distance from the rotation center of the rotary table 50, and rotates about the container support shaft 60. With respect to each casting work placed in the basket 72 of the rotary container 65, the distance from the center of rotation of the rotary table 50 changes momentarily, and the direction in which the centrifugal force acts also momentarily changes.
For this reason, the direction (360 ° in the horizontal direction) and magnitude of the centrifugal force acting on all the casting works in the rotary container 65 change every moment, so that the same centrifugal force is applied to all the casting works in the rotary container 65. Acts and all castings are dehydrated as well.

After the lapse of the set time, the main motor 37 is rotated at a low speed, the main shaft 20 is rotated at a low speed, and the first air cylinder 26
Compressed air is supplied to the head side of the first roller follower
28 is pressed against the outer peripheral surface of the spindle lock wheel 22. When the engagement recess 22A rotates and the first roller follower 28 engages with the engagement recess 22A on the outer periphery of the spindle lock wheel 22,
The 20 stops at the set angular position and the turntable 50 stops at the set position. At the same time, the main motor 37 is deactivated and the electromagnetic brake
Deactivate 41 to release the braking of the brake shaft 40. The rotary container 65 stops at the same time as the turntable 50 stops.

When compressed air is supplied to the head side of the third air cylinder 98 to extend the third piston rod 99, the swing plate 91 swings about the rotary shaft 90 and the chain 95 causes the support shaft sprocket. Engage with 83. When the sub motor is rotated at a low speed in this state, the power of the sub motor is transmitted to the rotary container 65 via the rotary shaft 90, the drive sprocket 92, the chain 95, the support shaft sprocket 83, and the container support shaft 60, and the rotary container 65.
Rotates at low speed.

Compressed air is supplied to the head side of the second air cylinder 86 to press the second roller follower 84 against the outer peripheral surface of the support shaft lock wheel 82. When the engaging recess 82A moves and the second roller follower 84 engages with the engaging recess 82A on the outer periphery of the support shaft lock wheel 82, the container support shaft 60 and the rotary container 65 stop at the set position, Motor rotation stops. The dehydrated liquid whose centrifugal force has been pressed against the inner peripheral surface of the rotating container 65 is released by stopping the rotation of the rotating container 65, and flows from the bottom opening 67 of the rotating container 65 through the recovery pipe 69 to the annular recovery groove 71, Be recovered.

The movable door 18 is opened, and the suspended lifting device is moved to a position right above the opening 17 along the upper rail. The lifting device is lowered in a predetermined posture, the engaging pieces of the lifting device engage with the upper ends of the contact rods 79A and 79B, and the locking device 77
The clamping levers 78A and 78B are released. The lifting device grips the support rod 73 of the basket 72, and in this state, the lifting device ascends together with the basket 72. The moving door 18 is closed and the basket 72 is transferred to the next washing process. Since the rotary base 50 stops at the set position and the rotary container 65 stops at the set position, the basket 72 is automatically loaded and unloaded by the sequence control.

[0025]

In the centrifuge of the present invention, the container support shaft is rotatably disposed at a position separated from the center of rotation of the rotary table by an eccentric distance, and the rotary container is connected to the upper end of the container support shaft. The main shaft is supported coaxially with the center axis of the rotary table, and the upper end of the main shaft is connected to the rotary table, and the rotary container rotates around the rotation center of the rotary table and rotates about the container support axis. ing. Therefore, with respect to the solid to be dehydrated in the rotary container, the distance from the rotation center of the rotary table changes momentarily, and the direction in which the centrifugal force acts also changes momentarily. Therefore, since the direction and magnitude of the horizontal centrifugal force that acts on all solids in the rotating container change momentarily, the same centrifugal force acts on all solids in the rotating container within the set time, The efficiency of centrifugation is improved,
All solids are dehydrated as well.

In the centrifuge of the present invention, when the rotary table is stopped at a predetermined position by stopping the main shaft at a predetermined angular position, the container support shaft is stopped at a predetermined angular position. The container was made to stop at a predetermined position. Therefore, the basket containing the solid to be dehydrated can be carried into the container by the automatic operation and fixed in the container, and the basket can be carried out from the container by the automatic operation after the dehydration.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an entire embodiment of the present invention.

FIG. 2 is an enlarged view around the main axis of FIG.

FIG. 3 is an enlarged view around the container support shaft of FIG. 1.

4 (a) is a plan view of the turntable of FIG.
FIG. 4 (b) is a perspective view of the spindle lock wheel of FIG.
(c) is a perspective view of the support shaft lock wheel and the support shaft sprocket of FIG. 1.

5 is a side view of the inside of the rotary container of FIG. 1. FIG.

FIG. 6 is a plan view of the rocking plate portion according to the embodiment of the present invention.

[Explanation of symbols]

 13 Annular guide frame 20 Main shaft 22 Main shaft lock wheel 22A Engagement recess 28 First roller follower 37 Main motor 38 Output shaft 40 Brake shaft 41 Brake device (electromagnetic brake) 44 Reducer 44A Reducer main body 45 Driven shaft 50 Rotating base 54 1st support roller 55 2nd support roller 60 Container support shaft 65 Rotating container 69 Recovery pipe 71 Annular recovery groove 82 Support shaft lock wheel 82A Engagement recess 84 Second roller follower

Claims (7)

[Claims] 1. A container support shaft is rotatably disposed at a position eccentric from a center of rotation of a rotary table, and a rotary container is connected to an upper end of the container support shaft, coaxially with a central axis of the rotary table. A centrifuge device in which a main shaft is supported and an upper end of the main shaft is connected to a rotary table, and a rotary container rotates around a rotation center of the rotary table and rotates around the container support shaft. 2. A main shaft is a hollow shaft, a brake shaft is inserted into a central vertical hole of the main shaft, a brake device is arranged at a lower end of the brake shaft, and a reducer body of a speed reducer is provided at a rotary table or an upper end of the main shaft. It is fixed so that the braking force of the brake device can be transmitted to the drive shaft of the reducer by the brake shaft, the driven shaft of the reducer is connected to the container support shaft by the transmission device, and the main shaft is connected to the output shaft of the main motor by the transmission device. The centrifuge according to claim 1, wherein the container support shaft is decelerated according to the speed reduction ratio of the speed reducer to rotate when the main shaft is rotated by stopping the rotation of the brake shaft by the brake device. 3. A lower end of the container support shaft is projected to the lower side of the turntable, and a discharge passage by a central vertical hole or a recovery pipe is formed in the central vertical hole of the container support shaft with the container support shaft as a hollow shaft. The upper end of the discharge passage communicates with the bottom opening of the rotary container, the annular recovery groove is disposed below the container support shaft, and the lower end of the discharge passage is always opposed to the annular recovery groove. The described centrifuge. 4. An annular guide frame is arranged near the outer periphery of the turntable, and a first support roller and a second support roller are rotatably connected to both ends of the turntable in the longitudinal direction. The centrifuge according to any one of claims 1 to 3, wherein the second support roller is arranged so as to be close to one surface of the guide frame and the second support roller is close to another surface of the guide frame. 5. The container is stopped at a predetermined position by stopping the container support shaft at a predetermined angular position when the rotary table is stopped at the predetermined position by stopping the main shaft at the predetermined angular position. The centrifuge according to any one of claims 1 to 4, wherein the centrifuge is adapted to perform. 6. A spindle lock wheel having an engagement recess formed on its outer periphery is coupled to a main shaft, a first roller follower is supported at a position facing the spindle lock wheel so as to be horizontally movable, and an engagement recess is provided on the outer periphery. The formed support shaft lock wheel is coupled to the container support shaft, the second roller follower is supported at a position opposite to the support shaft lock wheel so as to be horizontally movable, and the first roller follower is rotated when the main shaft rotates at a low speed. The first roller follower is pressed against the outer periphery of the main shaft and the first roller follower engages with the engaging recess of the main shaft lock wheel at a predetermined angular position of the main shaft to stop the rotation of the main shaft. The second roller follower is pressed against the outer periphery of the lock wheel and the second roller follower engages with the engaging recess of the support shaft lock wheel at a predetermined angular position of the container support shaft to stop the rotation of the container support shaft. The centrifuge according to claim 5, wherein the centrifuge is adapted to operate. 7. When the first roller follower engages with the engaging recess of the main shaft lock wheel at a predetermined angular position of the main shaft and rotation of the main shaft is stopped, braking of the brake device is released to rotate the brake shaft. 7. The centrifuge according to claim 6, wherein the container support shaft is made free, and the container support shaft is connected to the output shaft of the auxiliary motor by a transmission device, the rotation stop by the brake device is released, and the container support shaft rotates at a low speed.