JP3369870B2 - Rotary drive device of agitator in settling tank - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for rotating an agitator in a settling tank.

[0002]

2. Description of the Related Art A conventional rotating device for a stirring body in a settling tank rotates a central shaft of the settling tank, but a strong rotating force is required, resulting in high equipment cost. As described above, it is effective to use a rotary drive device equipped with a motor, which engages with a rail provided at the upper peripheral end of the settling tank to rotate the device to achieve miniaturization. However, it was a chain drive and had a complicated configuration.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention provides a rotary drive device for an agitator which can be installed inexpensively and compactly with a simple structure and can swivel reliably around the upper circumference of the precipitation tank.

[0004]

Therefore, according to the present invention, the upper end of the settling tank is self-propelled along a rail provided in the settling tank equipped with a motor, and the connected stirring body is rotated in the settling tank. In the above, a mounting base that can swivel the upper peripheral edge of the settling tank along the rail by the provided traveling roller is provided, and the drive roller and the driven roller that sandwich the upper end wall peripheral plate of the settling tank from the inside and outside of the setting tank rotate to the mounting base It is a rotation drive device for an agitator in a settling tank that is provided as much as possible and that is configured to rotate a drive roller in association with a motor. The driving roller may be arranged in front of the driven roller.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the present invention will be described below with reference to illustrated embodiments. In the form example shown in FIG. 1, 1 is a circular settling tank, and as shown in FIG. 3, a fitting tube 20 at the lower end is fitted to a supporting portion 10 projecting upward at the center of the inner bottom to form a central shaft. Rotating arm 3 supporting 2 at a right angle
The roller 32 is rotatably engaged with the upper end of the central shaft 2 and attached to the outer end of the rotating arm 3 as shown in FIG.
Is engaged with a rail 12 provided at the upper end of the settling tank 1 so that the rail can be swung on the rail 12.

Further, the outer end of the stirring body 34 is attached to the rotating arm 3 via the traction member 33, and the inner end of the stirring body 34 is attached to the central shaft side 2 so that the rotating arm 3 swirls to stir. The body 34 is towed and rotated.

As shown in FIGS. 5 to 7, the characteristic configuration of this embodiment is that the traveling rollers 41 and 42 are provided in the front and rear by a bracket 40 so as to be rotatable, and the traveling roller 4 is provided.
1,42 By engaging with the rail 12, the mounting base 4 can be swung on the rail 12, and the upper end wall peripheral plate 120 of the settling tank 1 under the rail 12 is made of rubber that is sandwiched from inside and outside of the settling tank 1. The drive roller 5 and the driven roller 6 are rotatably provided on the mount 4.

That is, the drive roller 5 and the driven roller 6 are horizontally rotatably supported so as to come into contact with the vertical upper end wall peripheral plate 120, and the drive roller 5 is moved inward through the upper end wall peripheral plate 120. , The driven roller 6 is attached to the outside,
The drive roller 5 is arranged before the driven roller 6.

The motor 7 installed on the mount 4
The drive roller 5 is driven and rotated by connecting the upper end of the drive shaft 51 of the drive roller 5 via the shaft 71 and the coupling 72. The lower end of the drive roller 5 is engaged with a bearing 53 provided on the bottom plate portion of the mounting base 4. Also,
The traction member 8 is attached to the outer side of the rear end of the mount 4, and the rear end of the traction member 8 is connected to the outer end of the rotary arm 3.

Next, the operation of this embodiment will be described. First, the motor 7 is rotated counterclockwise in FIG. 5 to rotate the drive shaft 51, and the drive roller 5 is rotated in a counterclockwise direction, so that the mounting base is rotated by friction with the fixed upper end wall peripheral plate 120. 4 moves forward. Then, since the driven roller 6 located outside the settling tank 1 is driven to rotate by sandwiching the upper end wall peripheral plate 120, the upper end wall peripheral plate 120 is sandwiched between the traveling rollers 41 and 42 on the rail 12. The mount 4 turns by itself. Since the large diameter roller portions 43 on both ends of the running rollers 41 and 42 engage and hold the inner and outer ends of the rail 12, respectively, the running rollers 41 and 4 move from the rail 12.
2 never comes off.

At this time, when the motor 7 and the driving roller 5 rotate counterclockwise, the mounting base 4 also tries to rotate, but the rotation is blocked by the upper end wall peripheral plate 120. The mounting base 4 is urged to rotate in a counterclockwise direction. That is, the drive shaft 51 is about to move toward the outside of the settling tank 1 on the front side and toward the inside of the settling tank 1 on the rear side.

Therefore, the driven roller 6 at the rear portion is urged to move toward the upper end wall peripheral plate 120 side, so that it is pressed against the upper end wall peripheral plate 120, and the drive roller 5 and the driven roller 6 are connected to the upper end wall peripheral plate 120. It is pinched and rotated to rotate. Since the rotating arm 3 is pulled and rotated by the turning of the mounting base 4, the stirring member 34 is rotated in the precipitation layer.
Swirls and stirs.

As described above, in this embodiment, the drive roller 5 is rotated by the drive of the motor 7, and the upper end wall peripheral plate 120 is strongly sandwiched between the drive roller 5 and the driven roller 6 to surely rotate the mounting base 4 forward. The stirring body 34 is pulled and swung. Since the traction member 8 is connected to the rear end of the mount 4 and the outer end of the rotary arm 3, it is possible to prevent the rear side of the mount 4 from being urged to move extremely inward. The extremely strong holding state of the upper peripheral wall 120 by the driven roller 6 and the driven roller 6 is prevented to prevent damage to them. That is, the rocking of the rear portion of the mounting base 4 is reduced to prevent the driving roller 5 and the driven roller 6 from holding the upper end wall peripheral plate 120 in an extremely strong clamping state.

Although the configuration example has the above-mentioned configuration, the present invention is not limited to this. For example, the shape and configuration of the mounting base that can swivel the upper peripheral edge of the settling tank along the rail is not limited, and the configurations of the traveling roller and the rail that travel along the rail are not limited. Further, the materials and mounting configurations of the driving roller and the driven roller that sandwich the upper end wall peripheral plate of the sedimentation tank from the inside and outside of the sedimentation tank are also appropriate, and as shown in FIG. 8, the driving roller 5 is placed outside the sedimentation tank and the driven roller. May be placed inside the settling tank and contacted with the peripheral portion of the upper end wall of the settling tank.

Further, means for connecting the drive roller and the motor is optional, and may be connected via a chain wheel.
The drive roller may be arranged after the driven roller, but the drive roller is swung more smoothly when it is at the front position. Further, regardless of the constitution of the stirring body and the connecting means with the stirring body, the rotary arm of the stirring body which swivels along the rail of the precipitation tank may be directly provided with the mounting base.

[0016]

According to the first aspect of the present invention, the upper end wall peripheral plate is elastically sandwiched between the driving roller and the driven roller which are rotated by the drive of the motor, whereby the self-propelled turning can be performed along the rail of the settling tank. The stirrer can be swirled in the settling tank.
Further, according to the second aspect, since the drive roller is at the front position, an unreasonable force due to the drive is not applied to the front portion, so that the forward rotation can be smoothly performed.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a settling tank using an embodiment of the present invention.

FIG. 2 is a vertical sectional view thereof.

FIG. 3 is an enlarged vertical sectional view showing a state where the central shaft is attached to a lower portion.

FIG. 4 is an enlarged vertical sectional view showing a traveling portion of a rotary arm of the stirring body.

FIG. 5 is a plan view in which a main part of the embodiment of the present invention is cut away.

FIG. 6 is a vertical cross-sectional rear view of the main part.

FIG. 7 is a vertical cross-sectional side view of a main part from the inside of the settling tank.

FIG. 8 is a plan view in which main parts are cut away according to another embodiment of the present invention.

FIG. 9 is a schematic plan view of a settling tank using a conventional driving device.

[Explanation of symbols]

1 settling tank 12 rails 120 Top wall peripheral plate 2 central axis 3 rotating arm 34 Stirrer 4 mounting base 41,42 Traveling roller 5 drive roller 51 drive shaft 6 Driven roller 7 motor 8 Towing material

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Claims (2)

(57) [Claims] 1. A self-propelled upper end of a sedimentation tank along a rail (12) provided with a motor (7) provided in the sedimentation tank (1), and a connected stirring body (34) is rotated in the sedimentation tank. In what makes
The traveling rollers (41, 42) are provided to provide a mounting base (4) that can turn the upper peripheral edge of the settling tank (1) along the rail (12), and the upper end wall peripheral plate (120) of the settling tank is installed in the settling tank. The driving roller (5) and the driven roller (6) sandwiched from the inside and outside are rotatably provided on the mount (4), and the driving roller (5) is connected to the motor (7) to rotate. Rotation drive device for agitator in settling tank. 2. The rotary drive device according to claim 1, wherein the drive roller (5) is arranged in front of the driven roller (6).