JPH08309169A - Stirring device - Google Patents

Abstract

PURPOSE: To conduct a low-speed rotation control accurately as specified by activating a drive means by fluid pressure using a liquid control means and converting a reciprocating motion by this drive means into the rotary motion of a gear member using a conversion means. CONSTITUTION: A pulse signal is connected to a switching valve 22 by a control device 23 to supply air to an air cylinder 7. Further, a valve pressure on an extrusion side or an extraction side is adjusted by the supply of the air from an air supply source 21. Consequently, a specified motional position for a reciprocating cylinder rod 7a is determined by the air pressure brought to bear upon the air cylinder 7. Thus, it is possible to adjust a support rod and a first and a second pusher 5a, 5b connected to the cylinder rod 7a. After that, the reciprocating motion by the air cylinder 7 is converted into the clockwise rotation of a gear 4, resulting in the rotation of a rotary shaft 3 and in turn, the rotation of a rotor 2. A motion is given to bubbles by the rotation of the rotor 2 in a paint, so that the bubbles are caused to ascend and then are removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer for defoaming by giving motion to bubbles existing in a highly viscous liquid stored in a storage tank.

[0002]

2. Description of the Related Art When coating paint on an automobile, first, when the paint for the automobile is sent to a painting booth by a pump,
Once stored in a storage tank, only the consumed amount is replenished to this storage tank. Then, from this storage tank, it is sent to the coating gun of the coating booth through the pipe under the pressure of the pump and is sprayed to the body of the target automobile. By the way, when the paint is replenished to the storage tank in this way, air is trapped in the paint to generate bubbles. Since the coating material for automobiles has a high viscosity (for example, 5000 to 6000 centipoise), bubbles are not released into the atmosphere but remain in the coating as it is. However, if the paint is sent to the coating gun and sprayed with air bubbles remaining, the atomized paint will vary, and uneven coating will occur on the coated surface, thus deteriorating the quality. Therefore, it is necessary to remove air bubbles generated when replenishing the storage tank.

Conventionally, a stirring device for stirring the paint in the storage tank has been used. FIG. 6 is a cross-sectional view showing the structure of a conventional stirring device. In this stirrer, a rotating body 52 made of a pipe is arranged via a rotating shaft 53 in a tank 51 for temporarily storing the paint, and the rotating shaft 53 is connected to the tank 5.
It is connected to the air motor 54 outside 1. A main compressor 55, which is a power source for supplying air to drive the air motor 54, is connected to the air motor 54, and a holiday compressor 56 is further connected to the air motor 54. Therefore, normally, the air motor 54 is rotated by the supply of air from the main compressor 55, and the air motor 5 is rotated.
The rotating shaft 53 and the rotating body 52 rotate with the rotation of 4.

At this time, if the rotating body 52 rotates at a high speed, air may be entrained and air bubbles may be further generated in the paint. Therefore,
It is known from experiments and the like that the rotating body 52 has an appropriate speed of about 5 rpm. Although not shown, another conventional example uses an electric motor instead of the air motor 54, and the rotation of the electric motor is controlled by electric control instead of air supply.

[0005]

However, such a conventional stirring device has a problem that the rotation speed is not stable. That is, when the air motor 54 is used, if the amount of air supplied from the main air compressor 55, which is a power source, is small, the air supply to the air motor 54 varies. Also, on holidays, the main air compressor 5
The holiday compressor 56 is used instead of 5, but the air pressure changes when the compressor 56 is switched. When such a pressure fluctuation of the air occurs, the driving force applied to the air motor 54 changes, so that the number of rotations changes. On the other hand, if the paint in the tank 51 is discharged and the amount thereof changes, the rotation resistance of the rotating body 52 changes, so that the main air compressor 5
Even if the amount of air supplied from the motor 5 is stable, the rotation speed of the air motor 54 changes. Therefore, if the number of rotations of the air motor 54 is changed and the rotation speed is high, the air will be entrained and bubbles will be further generated.

In this way, if the rotation of the rotating body 52 is unstable, especially at high speed rotation, bubbles that should originally be removed are further generated in the paint, so that the high speed rotation is suppressed. Need a reducer. However, while this contributes to stabilizing the rotational speed, it costs a lot to install or replace the speed reducer.
In contrast to such an air motor 54, in the case where an electric motor is used, when the target fluid is a material having flammability, an explosion-proof electric motor is required, which is very expensive. Further, the rotation speed can be adjusted more easily than that using the air motor 54, but for that purpose, an inverter must be installed, which also makes the stirring device itself expensive.

Therefore, an object of the present invention is to provide an inexpensive stirrer capable of accurately performing a predetermined low speed rotation control.

[0008]

The stirring device of the present invention stirs a viscous liquid in a storage tank by rotating a rotary member in the storage tank, and is connected to a rotary shaft of the rotary member. Gear member, drive means for reciprocating movement by fluid pressure, fluid control means for controlling supply of fluid to the driving means, and reciprocating movement for reciprocating movement associated with the driving means and the gear member. Motion conversion means for converting into. Further, the stirring device of the present invention,
The motion converting means is provided on a pair of pressing members abutting on the teeth of the gear member provided on the circumference and a driving member of the driving means, so that the pair of pressing members can be vertically swung. It is desirable to have a supporting member for supporting and a pair of cam plates that are formed with a contour curve that vertically changes the moving position of the pressing member and that are arranged in parallel in the driving direction of the driving means.

Further, in the stirring device of the present invention, the pressing member is a holding member fixed to the supporting member, a pawl pivotally supported by the holding member that abuts against the teeth of the gear member, and the pawl. It is desirable to have a locking pin fixed to the holding material that limits the rotation of the holding material and a roller that is engaged with the upper end of the holding material that abuts on the cam member. In the stirring device of the present invention, the motion conversion means is another gear member that is a bevel gear that meshes with the gear member that is a bevel gear, and a link member that is associated with the drive means and the other gear member. It is desirable to have

[0010]

The stirring device of the present invention stirs the viscous liquid in the storage tank by rotating the rotating member in the storage tank. At this time, the drive means reciprocates by the fluid supplied by the fluid control means. Then, the motion converting means, which receives the reciprocating motion, rotates the gear member, so that the rotation of the gear member is transmitted to the rotating member in the storage tank through the rotating shaft. As described above, since the fluid pressure is indirectly transmitted to the gear member through the drive means by controlling the fluid pressure by the fluid control device, the viscous liquid in the storage tank is agitated by the stable low-speed rotation without being affected by the fluid fluctuation. To be done. Further, the stirring device of the present invention, by the control of the fluid pressure by the fluid control device and the rotation of the gear member via the drive means, to rotate the rotating member in the storage tank to stir the viscous liquid, at that time, When the drive member of the drive means reciprocates, the pressing member supported by the support member moves up and down by the contour curve of the cam plate, and the support member reciprocates while swinging around the engaging portion with the drive member. The reciprocating motion causes the pressing member to come into contact with the teeth of the gear member to give rotation to the gear member.

Further, in the agitator of the present invention, the reciprocating motion of the driving means brings the pressing member into contact with the gear member, and the rotating member in the storage tank is rotated as the gear member rotates to cause viscous liquid. The roller is guided by the cam member at that time, and even if one of the pair of pressing members comes into contact with the teeth of the gear member by the forward path and the return path, there is no restriction of the locking pin. The rotation of the claw of the other pressing member is restricted by the locking pin without giving a resistance to the tooth due to the free rotation of the claw, and the resistance is applied to the abutting tooth so that the gear member is moved in the movement direction. Rotate. Further, the stirring device of the present invention, while the rotation of the gear member via the drive means by the control of the fluid pressure by the fluid control device, to rotate the rotating member in the storage tank to stir the viscous liquid,
At that time, when the drive member of the drive means reciprocates, the link member which receives the motion rotates the gear member which is a bevel gear, and the rotation is transmitted vertically to rotate the rotary member.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stirring device of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the stirring device of the first embodiment as viewed from the front, and FIG. 2 is a cross-sectional view of the stirring device as a whole viewed from the side. In particular,
Similar to the conventional example, a viscous liquid having a high viscosity is once shown (in this example, the "paint" applied to the vehicle is also shown, and the viscosity is 5
It is 800 centipoise. ) Is stored in a closed tank 1 in which a rotating body 2 for stirring the paint is attached to a rotating shaft 3
Has been laid up. In this rotating body 2, a plurality of straight pipes are fixed perpendicularly to the rotating shaft 3, and the tank 1 is provided at the lower end portion.
A pipe shaped according to the shape of is fixed.

On the other hand, a gear 4 is coaxially fixed to the upper end of a rotary shaft 3 extending outside the tank 1. The gear 4 constitutes a crown gear formed in a circumferential shape with teeth protruding upward. Then, the gear 4 is provided with a first pusher 5a and a second pusher 5a for imparting rotation thereto.
b is attached. First and second pushers 5a, 5b
Are provided so as to form a pair at both ends of the support rod 6 passing through the center position of the gear 4, and the first and second pushers 5a, 5 at both ends thereof are paired.
b is located on the circumference that contacts the teeth 4a of the gear 4. Details of this pusher will be described later.

A cylinder rod 7a of an air cylinder 7 is vertically engaged with the support rod 6 at the center thereof. As described above, the stirring device of the present embodiment is driven by the air cylinder 7. However, the air cylinder 21 has an air supply source 21 for driving the air cylinder 7, which converts the supply of air during pushing or pulling back. Is connected via a switching valve 22 for controlling the switching of the switching valve 22. In addition, the first and second pushers 5a and 5b
First and second cams 8a, 8b for restricting the vertical movement of the
However, each of the first and second pushers 5a and 5b is attached to the ceiling of the case 9 that covers the gear 4, the first and second pushers 5a and 5b, and the like.
It is provided to correspond to.

Next, the first and second pushers 5a and 5b will be described in detail. FIG. 3 is a perspective view showing the pusher. 4 is a side view of the inside of the pusher, the states of the pushers located on the convex portions of the respective cams are shown side by side for convenience. The first and second pushers 5a,
In both 5b, the cover 11 is fixed to each end of the support rod 6. A roller 12 is provided on the upper portion of the cover 11 so as to rotate in a direction perpendicular to the support rod 6, while a pusher claw 13 is rotatably supported by a pin 15 on the lower portion of the cover 11. ing. As shown in FIG. 4, curved surfaces 13a are formed in the opposite directions at the lower ends of the pair of pusher claws 13, respectively.

A locking pin 14 for restricting the rotation of the pusher claw 13 is fixedly provided in the cover 11 of the first and second pushers 5a, 5b. The locking pins 14 are both on the clockwise side with respect to the pusher claws 13 and are fixed at positions where the pusher claws 13 are substantially vertical when the pusher claws 13 come into contact with each other. On the other hand, the first and second cams 8a and 8b fixedly mounted on the ceiling of the case 9 are made of a plate material having a thickness such that the roller 12 rolls, and they are paired in parallel with the driving direction of the cylinder rod 7a. It is arranged in the upright state. Also, the first and second cams 8
Curved convex portions are formed on a and 8b such that the vertices thereof are displaced by the same dimension with respect to the rotation center of the gear 4.

The stirrer having such a structure operates as follows. A pulse signal for an operation command is transmitted to the switching valve 22 by the control device 23, and the switching valve 22 receives the pulse signal to supply the air from the air supply source 21 to the air cylinder 7 to supply the air to the push-out side or the pull-back side. The valve pressure is adjusted. Therefore, the predetermined movement position of the reciprocating cylinder rod 7a is determined by the pressure of the air received by the air cylinder 7. Therefore, the cylinder rod 7
a support rod 6 connected to a and first and second pushers 5a,
5b can be adjusted. Therefore, driving of the first and second pushers 5a and 5b will be described in detail. The arrow A in FIG. 4 will be described as the pushing direction and the arrow B will be described as the pulling direction. The stroke of the cylinder rod 7a is determined by the P position of the first pusher 5a and the Q position of the second pusher 5b.
The distance to the position.

First, when the cylinder rod 7a is pushed out in the direction A by driving the air cylinder 7, the first and second pushers 5a, 5b are pushed out from the P position to the Q position via the pusher shaft 6. At this time, the rollers 12 of the first and second pushers 5a and 5b move to the first and second cams 8a and 8a.
Roll along the lower surface of 8b. Then, of the first and second pushers 5a and 5b, the first pusher 5a rolling on the first cam 8a having the convex portion formed on the P side descends along the convex portion of the first cam 8a. Therefore, the tip of the pusher claw 13 of the first pusher 5a surely abuts the tooth 4a, and a force is applied in the direction of rotating the pusher claw 13, but the rotation is limited by the locking pin 14 above. , The state where the pusher claw 13 stands vertically is maintained. Therefore, the driving force of the cylinder rod 7a in the A direction is transmitted to the teeth 4a of the gear 4 and converted into the rotational force for rotating the gear 4.

On the other hand, when the first pusher 5a falls, the second pusher 5b has a cylinder rod 7a of the pusher shaft 6.
It rises in reverse due to the swinging motion centered on the connection part with.
Therefore, the pusher claw 13 of the second pusher 5b is not limited to the tooth 4a, and even if the pusher claw 13 interferes with the tooth 4a, the curved surface of the lower end of the pusher claw 13 strokes the tooth 4a while rotating itself. Thus, the gear 4 is not overridden and resistance is not given. In this way, the first and second cams 8
The protrusions a and 8b are misaligned, and at the midpoint of the support rod 6, they alternately tilt like a seesaw, and accordingly, the first and second pushers 5a and 5b also rise and fall alternately.

While the pusher claw 13 of the first pusher 5a meshes with the teeth 4a and imparts rotation to the gear 4, the first and second pushers 5a and 5b both move linearly to the Q position. After that, when moving to the Q position, air is supplied to the air cylinder 7 by the pulse signal from the control device 23 so as to pull back the cylinder rod 7a. Therefore, the first and second pushers 5a and 5b move in the B direction by the pullback operation of the cylinder rod 7a. When moving in the B direction, the second pusher 5b comes into contact with the lower teeth 4a because it immediately passes through the convex portion of the second cam 8b, while the pusher claw 1 of the first pusher 5a is in contact.
3 rotates to get over the teeth 4a. Therefore,
At the time of pulling back, while the pusher claw 13 of the second pusher 5b meshes with the tooth 4a and imparts clockwise rotation to the gear 4, the first and second pushers 5a and 5b both linearly move to the P position.

As described above, the reciprocating motion of the air cylinder 7 is converted into the clockwise rotation of the gear 4. Therefore, the rotating shaft 3 rotates in response to the rotation of the gear 4, and the rotating body 2 that is engaged with the rotating shaft 3 also rotates. Then, the rotating body 2 crosses the vicinity of the air bubbles that have been stationary in the highly viscous paint, and the movement of the air bubbles is given to the air bubbles so that the air bubbles rise and are removed by sliding on the curved surface of the rotating body 2 made of a pipe. It

Therefore, the stirrer of this embodiment having such a structure has the following effects. That is, the supply of the main air compressor, which is the power source, varies, but since the drive position of the cylinder rod 7a can be controlled, even if the supply of air to the air cylinder 7 varies, the gear 4 is not changed. The number of rotations can be stabilized, and air bubbles in the paint can be properly removed. Also, tank 1
If the liquid amount of the paint in the inside fluctuates, the rotation resistance of the rotating body 2 fluctuates and the rotation becomes unstable. However, in this case as well, since the drive position of the cylinder rod 7a may be controlled, stable rotation is achieved. The rotation of the body 2 can be obtained, and the bubbles in the paint can be properly removed.

Further, since stable rotation can be obtained without using a speed reducer or the like, the cost of the stirring device can be reduced. Further, in the above embodiment, the one using air is shown, but other hydraulic pressure may be used.
In any case, it is possible to safely handle flammable materials, and there is no need for an explosion-proof type as in the case of an electric motor, which also contributes to the low price of the stirring device.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a cross-sectional view showing the stirring device of this embodiment. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. In the stirring device of this embodiment, a bevel gear is formed on the rotating shaft 3. In this bevel gear, a passive gear 31 is fixed to the rotating shaft 3 and is constituted by an active gear 32 that is vertically meshed with the passive gear 31. A rotary disk 33 is coaxially and integrally fixed to the active gear 32. Further, in the present embodiment, the connecting rod 34 is pin-connected by the tip of the cylinder rod 7a of the air cylinder 7 and the circumferential end of the rotary disk 33 to form a link.

The stirrer of this embodiment having the above-mentioned structure operates as follows. The switching valve 22 is controlled by the control device 23, the air supply from the air supply source 21 supplied to the air cylinder 7 is adjusted, and the movement position of the reciprocating cylinder rod 7a is determined. When the cylinder rod 7a reciprocates in this manner, the movement is transmitted to the connecting rod 34 and the turntable 33 is rotated.
The rotation is transmitted from the active gear 32 to the passive gear 31,
The rotating body 2 rotates in the paint via the rotating shaft 3.

According to the agitator of the second embodiment as described above, in addition to the same effects as those of the first embodiment, the cylinder rod 7a is used to rotate the turntable 33.
Drive direction is not restricted, the air cylinder 7
Since it can be freely arranged within the range where it does not interfere with
It is now possible to effectively utilize the installation space.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described first embodiment, the crown gear in which the teeth of the gear are projected upward is used, but a spur gear or the like may be used as generally seen. Further, for example, in the second embodiment, the bevel gear is used, but in addition to this, a hypoid gear or the like may be used as long as the rotary shaft has an angle.

[0028]

The stirrer of the present invention stirs the viscous liquid in the storage tank by rotating the rotating member in the storage tank, and the drive means is driven by the fluid pressure by the fluid control means. However, since the gear member is configured to rotate through the motion converting means that converts the reciprocating motion by the driving means into the rotary motion, it is possible to provide an inexpensive stirring device that can accurately perform a predetermined low speed rotation control. Became possible.

[Brief description of drawings]

FIG. 1 is a sectional view showing a front surface of a stirring device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a side surface of a stirring device according to a first embodiment of the present invention.

FIG. 3 is a perspective view showing a pusher in the stirring device of the first embodiment.

FIG. 4 is a side view in which the position of the pusher is displaced in the stirring device of the first embodiment.

FIG. 5 is a sectional view showing a front surface of a stirring device according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a front surface of a stirring device according to a conventional example.

[Explanation of symbols]

 1 Tank 2 Rotating Body 3 Rotating Shaft 4 Gear 5a, 5b Pusher 6 Pusher Shaft 7 Air Cylinder 8a, 8b Cam 11 Cover 12 Roller 13 Pusher Claw 14 Locking Pin 31 Passive Gear 32 Active Gear

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shinji Sakoguchi 100 Kanayama, Ichiriyama Town, Kariya City, Aichi Prefecture Toyota Toyota Auto Body Co., Ltd.

Claims (4)

[Claims] 1. A stirrer for stirring a viscous liquid in a storage tank by rotating a rotating member in the storage tank, which reciprocates with a gear member connected to a rotating shaft of the rotating member by fluid pressure. A drive means; a fluid control means for controlling the supply of fluid to the drive means; and a motion conversion means for converting the reciprocating motion associated with the drive means and the gear member into a rotary motion. Stirrer. 2. The stirrer according to claim 1, wherein the motion converting means is associated with a pair of pressing members that abut on teeth of the gear member provided on a circumference and a driving member of the driving means. A pair of support members that are provided to support the pair of pressing members in a vertically swingable manner, and a contour curve that changes the moving position of the pressing members up and down and that are arranged in parallel in the driving direction of the driving unit. Stirrer having a cam plate. 3. The stirring device according to claim 2, wherein the pressing member includes a holding member fixed to the supporting member, and a claw pivotally supported by the holding member that abuts on a tooth of the gear member. An agitating device comprising: a locking pin fixed to the holding member that limits rotation of the claw; and a roller that is engaged with an upper end of the holding member that abuts on the cam member. 4. The stirrer according to claim 1, wherein the motion converting means is a bevel gear that meshes with the gear member that is a bevel gear, the drive means, and the other gear member. And a link member that is engaged with the stirring device.