JPH08152425A - Sphere rotating device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a sphere rotating device capable of stably rotating an extremely small sphere without shaking. According to the present invention, a vertically rotating solid shaft, a spherical body support that supports a spherical body fixed to the rigid shaft end, and a spherical body support on the vertical axis of the rigid shaft are provided at symmetrical positions to rotate and move up and down. With a pressure rotation device, the sphere is mounted on a sphere receiver, and the pressure rotation device is lowered and pressed to rotate the sphere, and by rotating the sphere receiver, the sphere is revolved. Since the entire surface of the sphere is evenly rotated, it is possible to provide a sphere rotating device capable of stably rotating a sphere of a small size, particularly a sphere of a very small size without shaking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sphere rotating device,
In particular, the present invention relates to a sphere rotating device used for nondestructive inspection of a very small diameter sphere (ball) by ultrasonic waves or the like.

[0002]

2. Description of the Related Art A conventional rotating device for a spherical body has a pair of rollers each having a V-shaped groove cut in the circumferential direction and arranged side by side in parallel with the roller shaft so that both ends of the pair of rollers are rotatable. Support. A gear groove is machined in the roller axial direction on the peripheral surface other than the V-shaped groove surface of this roller, and one drive gear shaft is installed so as to be incorporated in the gear groove of a pair of rollers, and this drive gear shaft is rotationally driven. By doing so, a mechanism for rotating the pair of rollers by the transmission of the power of the gear is provided. Then, by placing the sphere to be rotated in the V-shaped groove of the pair of rollers, the sphere is rotated by the frictional force of the contact portion between the side surface of the V-shaped groove of the roller and the sphere.

[0003]

However, according to the conventional rotating device for a spherical body as described above, when the spherical body is placed in the V-shaped groove portions of the pair of roller jigs, the contact point between the V-shaped groove portion and the spherical body is Since it is supported at four points, there is a problem that the accuracy of the V-shaped groove processing of the roller jig is poor. Further, when the sphere is placed due to the position shift of the roller, etc., the sphere does not completely support four points but supports three points, and there is a problem that when the roller is rotated, the sphere is rattled or the sphere rotates while swinging. It was In order to solve these problems, it was necessary to manufacture a roller jig having excellent processing accuracy and assembly accuracy.

In addition, a sphere with a relatively large size has a small sway, but a sphere with a small size, particularly a sphere with a very small size, has a large amount of play, and the sway of the sphere becomes noticeable. However, there is a problem that the production of the roller itself is difficult.

Further, since the drive system is based on the transmission of gear power, when the power transmission of the gear of the drive gear shaft is transmitted to the gear portion of the roller, vibration and backlash are generated by the gear, which are transmitted to the mounting sphere on the roller. When the sphere is rotated by gear drive, it causes the sway of the sphere. Further, the sway of the sphere becomes more remarkable as the size of the sphere becomes smaller, and it has a great influence at the time of nondestructive inspection by ultrasonic flaw detection of the sphere. When the sway of the sphere becomes large, the flaw detection of the sphere itself becomes difficult.

The present invention has been made to solve the above problems, and an object thereof is to provide a rotating device for a sphere of a small size, particularly a sphere of a very small size, which can rotate stably without shaking. is there.

[0007]

In order to achieve the above object, a rotating device for a spherical body according to claim 1 of the present invention is a spherical body receiving device for supporting a vertically rotating rigid shaft and a spherical body fixed to the rigid shaft end. And a pressure rotating device that is provided at a symmetrical position of the spherical body receiving member on the vertical axis of the hard axis and that rotates and moves up and down, and mounts a spherical body on the spherical body receiving device to provide the pressure rotating device. It is characterized in that the spherical body is rotated about its own axis by rotating downwardly and pressurizing and rotating, and the spherical body is rotated about its axis to rotate the spherical body evenly.

According to a second aspect of the present invention, in the sphere rotating device according to the first aspect, the pressurizing and rotating device is a drive belt which is rotated by power of a motor or the like at a moving frame end which is moved up and down by power of an air cylinder or the like. A plurality of driven belt wheels arranged horizontally with the vehicle are provided, the belt is wound around the belt wheel, and a spherical pressing piece is arranged at the spherical vertex contact portion of the horizontal belt portion, and the belt and the spherical pressing piece are provided by an air cylinder device. The vertices of the sphere are pressed through the sphere and the drive belt wheel is rotated to cause the belt to run endlessly so that the sphere can be rotated.

According to a third aspect of the present invention, in the rotating device for a spherical body according to the first aspect, among the material of the belt constituting the pressure rotating device and the material of the spherical body fixed to the vertical shaft end, the belt material is It is characterized in that a material having a friction coefficient larger than that of the spherical support material is used.

According to a fourth aspect of the present invention, in the sphere rotating device according to the first aspect, the sphere receiving member is formed into a hollow cylindrical shape for holding the sphere at an arbitrary stable angle, and has a diameter group of the sphere. It is characterized in that it can be replaced according to the requirements, and can revolve a large diameter sphere from an extremely small diameter sphere.

According to a fifth aspect of the present invention, in the spherical rotating device according to the first aspect, the pressure rotating device is a roller which is rotated by power of a motor or the like at a moving frame end which is moved up and down by power of an air cylinder or the like. Is provided, the apex of the sphere is pressed by the roller by the air cylinder device, and the sphere is rotatable by rotating the roller.

[0012]

According to the present invention, since the sphere is stably placed on the sphere receiver and the sphere is rotated, the sphere can be freely rotated without shaking. Further, the sphere is placed on the sphere receiver, and the belt wheel of the horizontal belt of the pressure rotation device is rotationally driven, whereby the sphere having the sphere apex portion in contact with the horizontal belt rotates on its axis. At this time, the rotational frictional force of the contact surface between the spherical body placed on the spherical support and the spherical support is adjusted to be smaller than the rotational frictional force at the contact point between the horizontal belt and the spherical vertex when the spherical body rotates. . Furthermore, by rotating the ball receiver itself around the axis of the ball receiver,
Revolution of the sphere can be performed. At this time, the rotational friction of the contact surface between the spherical body and the spherical body in the rotational direction is adjusted to be smaller than the rotational frictional force in the rotational axis rotational direction of the contact point between the spherical vertex and the horizontal belt.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment of the present invention (corresponding to claims 1 to 4). As shown in the figure, the sphere rotating device of the present embodiment is mainly composed of a pressure rotator A, a sphere support rotator B, and a probe C of an ultrasonic flaw detector, not shown.
And a water tank D.

First, the pressure rotation device A will be described with reference to FIGS. The lower end of the moving frame 1 is 2 horizontally.
The shaft 2 of the book is firmly attached with a nut. A driven belt wheel 3 is rotatably inserted into the shaft 2 and is stopped by a snap ring. A shaft 4 which rotates via a bearing 5 is attached to the moving frame 1, and a drive belt wheel 6 is provided at one end of the shaft 4 and a belt wheel 8 for a drive belt 7 is provided at the other end of the shaft 4. It is fixed by. A belt 7 is wound around the driven belt wheel 3 and the drive belt wheel 6, and is rotated in the arrow direction by the rotation of the drive belt wheel 6.

A sphere pressing piece 10 is attached to the moving frame 1 with a screw 11 at a portion where the apex of the rotated sphere E comes into contact, and when the sphere E is pressed by the pressure rotating device A, the belt 9 becomes concave. It is designed so as not to be deformed. A deceleration motor 12 for rotating the belt 9 is attached to the moving frame 1. A belt wheel 13 and the like are fixed to the output shaft of the deceleration motor 12 with a key or the like, and a drive belt 7 is wound around the belt wheel 13. The rotational force of the deceleration motor 12 is the driving belt 7 and the belt wheel 8.
The belt 9 is rotated via the.

A linear motion bearing 14 is incorporated in the boss portion of the moving frame 1 and is fixed to the boss portion by a bearing retainer 15. On the other hand, a shaft 16 forming a pair with the linear motion bearing 14 is attached to the boss portion of the fixed frame 17. It is firmly fixed with a holding disc and bolts.

The air cylinder 18 is fixed to the fixed frame 17 with bolts 19. The tip of the lot of the air cylinder 18 is firmly attached to the moving frame 1 by a nut, and the moving frame 1 is operated by the operation of the air cylinder 18.
The belt 9 provided at the tip portion of the frame 1 moves up and down through the.

The pair of pulley devices 20 are provided at the uppermost portion of the fixed frame 17, and a rope 21 is hung on the pulley device 20. One end of the rope 21 is connected to the moving frame 1 via the hanging ear, and the other end is connected to the balance weight 22 via the hanging ear to reduce the lifting force of the moving frame 1 due to the operation of the air cylinder 18.

Next, the sphere supporting and rotating device B will be described with reference to FIGS.
Will be described. As shown in these figures, the rigid shaft 22
Is vertically attached via a spherical bearing 24 in a housing 23 attached to the lower surface of the water tank D. A hole is provided at the upper end of the rigid shaft 22, and a belt wheel 25 is provided at the lower end.
Is attached with a key. A hole receiving member 26 having a cylindrical upper portion is inserted into the hole and fixed with a set screw 27. The hole receiver 26 can be easily replaced by the diameter group of the sphere E.

On the other hand, a belt wheel 29 is attached to the output shaft end of the deceleration motor 28 by a key or the like. A belt 30 is wound between the belt wheel 29 and the belt wheel 25 provided on the rigid shaft 22, The rotational force of the deceleration motor 28 is the belt 3
The ball receiving device provided at the rigid shaft end is rotated via 0 and the belt wheel 25.

Next, a method of rotating the sphere will be described with reference to FIG. In FIG. 4, P is the pressure applied by the pressure rotation device A,
P ′ is a reaction force (P ′ = P / cos θ) in the direction of the ball center generated on the sphere E on the sphere receiver 26, and θ is the sphere E of the sphere receiver 26.
S'is the supporting radius of the sphere E of the sphere support 26, s is the radius of the contact surface between the belt 9 and the sphere E, and μ and μ'are the sphere E and the belt 9 and the sphere E and the sphere receiver 26. , And the rotation of the sphere due to the rotation of the belt is called rotation, and the rotation of the sphere due to the rotation of the sphere receiver is called the revolution.

Here, the condition for rotating the sphere E is Pμ>
P′μ ′ = (P / cosA) μ ′, μ> μ ′ / cos θ
The friction coefficient μ between the belt and the sphere is
It is the value obtained by dividing the friction coefficient between spheres by the sphere support angle.

The condition for revolving the sphere E is Pμs <
P'μ's ', and in this device, the s dimension is extremely small due to the action of the spherical pressing piece 10 provided at the apex of the spherical body. Therefore, the rotational torque of Pμs is smaller than that of P'μ's'. It becomes significantly smaller, and the sphere E rotates about the contact point of the belt 9 at the apex as the center of rotation. In the present device, the materials of the belt 9 and the ball receiving member 26 satisfying the above conditions are selected.

The operation of this embodiment will be described with reference to FIGS. The sphere E is set on the cylindrical portion of the sphere receiving member 26 of the sphere supporting and rotating device B provided in the water tank D. Next, compressed air is supplied to the air cylinder 18, and the belt 9 is lowered through the moving frame 1 to press the apex of the sphere E. As for the pressing force, an appropriate pressing force can be obtained by a pressure adjusting valve (not shown).

Therefore, when the deceleration motor 12 provided on the moving frame 1 is energized, the rotational force thereof causes the drive belt wheel 6 to rotate via the drive belt 7 and the belt wheel 8, and the belt 9 rotates in the direction of the arrow. To do. Since the belt 9 presses the apex of the sphere E, the sphere E is caused by the frictional force between the sphere E and the belt 9.
Rotates.

Next, the deceleration motor 2 of the spherical support rotation device B
When 8 is energized, its rotational force is belt 30, belt wheel 2
The hard shaft 22 rotates via the 5. Since the spherical body E is set in a pressed state in the cylindrically shaped portion of the spherical body receiving member 26 provided at the upper end of the rigid shaft 22, the reaction force P against the applied pressure P and the spherical body E support radius s. ′ And sphere support 22
By the torque due to the friction coefficient μ ′ of the spherical body E, the spherical body E revolves at the same time as the spherical body receiving member 22.

5 (A) to 5 (G) are explanatory views for rotating the entire surface of the sphere uniformly by combining the rotation and the revolution. That is, FIG. 5 (A) is a view in which the sphere E and the belt 9 are rotated about the axis, and FIG. 5 (B) is a view in which the sphere E is rotated about 30 ° while the sphere E is rotated about the axis. Or later,
As shown in FIG. 5 (C) to FIG. 5 (F), if the rotation and the revolution are sequentially repeated and the revolution is performed by 180 ° in FIG. 5 (G),
The entire surface of the sphere can be rotated evenly.

FIG. 6 is a constitutional view (corresponding to claim 5) of a rotating portion of a pressure rotating device according to another embodiment of the present invention.
Is a side view showing a part of the rotating part in section, and FIG. 6B is a front view of the rotating part. The present embodiment is different from the above embodiment in that, in the pressure rotation device A, a belt is used as a means for rotating a sphere on its own axis, but in this embodiment, a roller 31 having a large friction coefficient is directly applied. Since they are in pressure contact with each other, and other points are the same, the same portions are denoted by the same reference numerals, and duplicate description will be omitted.

As shown in the figure, a roller 31 having an outer periphery lined with a material having a large friction coefficient such as rubber 32 is rotatably attached to the tip of the moving frame 1 via the shaft 2. A drive belt wheel 6 is fixed to one end of a shaft 4 rotatably incorporated in the moving frame 1 via a bearing 5, and a belt wheel 8 is firmly fixed to the other end by a key or the like. The rotational force of the drive belt 7 is transmitted to the roller 31 via the belt wheel 8, the belt wheel 3 and the belt 9 by the belt wheel 6 and the belt 9 wound around the roller 31.

In the pressurizing / rotating device thus constructed, when air is supplied to the air cylinder 18 to the sphere E mounted on the sphere holder (not shown), the apex of the sphere E of the roller 31 is pressed through the moving frame 1. . When the deceleration motor 12 is energized in this state, the rotational force is transmitted to the roller 31 via the belts and the pulleys as described above, and the sphere E rotates.

Next, the relationship between the spherical support 26 and the rotated spherical body E will be described with reference to FIG.

The support angle 2θ of the sphere E is generally from 60 ° to
90 ° is said to be good. As shown in FIG.
When the angle is larger than this angle, the supporting pressure P ′ against the applied pressure P increases, and the resistance of the spherical body E and the spherical body support 26 increases, which is not preferable for the rotation of the spherical body by the belt 9 of the pressure rotation device A. On the other hand, as shown in FIG.
If the support angle 2θ of the sphere E is smaller than the above angle, a phenomenon such as the sphere E jumping out of the sphere receiver 26 due to the rotating force of the belt 9 is not preferable. Therefore, when the support angle 2θ is out of the above angle with respect to the diameter d of the sphere E, the sphere E having a wide diameter d from a small diameter to a large diameter can be rotated by replacing the sphere holder.

According to the present embodiment, the sphere is stably placed on the sphere receiving member in the rotation and revolving movements of the sphere, and since the sphere performs the rotating movement, the sphere does not sway and can freely rotate. It becomes possible to do.

In the present invention, the belt is used as the pressure rotating device, but a roller lined with a material having a large friction coefficient such as a rubber lining may be directly contacted with the spherical body to rotate under pressure. Further, in the present invention, the ultrasonic flaw detector is used, but it goes without saying that it can be used as a sphere rotating device for all flaw detectors such as X-ray inspection.

[0035]

As described above, according to the present invention,
It is possible to provide a rotating device for a sphere having a small size, particularly a sphere having an extremely small size, which can stably rotate without shaking.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a front view of a rotating portion of the pressure rotation device of FIG.

FIG. 3 is a side view showing a cross section of a part of a rotating portion of the pressure rotation device of FIG.

FIG. 4 is a side view of the ball receiving portion of FIG.

5 is a diagram for explaining the spherical flaw detection method of FIG. 1. FIG.

6A and 6B are configuration diagrams of another embodiment of the present invention, in which FIG. 6A is a side view showing a part of the rotating portion in section, and FIG. 6B is a front view of the rotating portion.

FIG. 7 is a diagram for explaining the relationship between a spherical body receiving member and a spherical body according to the present invention.

[Explanation of symbols]

1 ... moving frame, 2 ... axis, 3 ... driven belt wheel, 4 ...
Shaft, 5 ... Bearing, 6 ... Drive belt wheel, 7 ... Drive belt, 8 ... Belt wheel, 9 ... Belt, 10 ... Sphere holding piece, 11 ... Screw, 12 ... Reduction motor, 13 ... Belt wheel,
14 ... Linear motion bearing, 15 ... Bearing retainer, 16 ...
Shaft, 17 ... Fixed frame, 18 ... Air cylinder, 19 ...
Bolt, 20 ... Pulley device, 21 ... Rope, 22 ... Balance weight, 23 ... Housing, 24 ... Sphere bearing, 25 ... Belt wheel, 26 ... Sphere receiver, 27 ... Set screw,
28 ... deceleration motor, 29 ... belt wheel, 30 ... belt, A
... pressure rotation device, B ... sphere support rotation device, C ... probe, D ... water tank, E ... sphere.

Front page continuation (72) Inventor Soji Iwasawa 1-1-1 Shibaura, Minato-ku, Tokyo Inside Toshiba Head Office

Claims (5)

[Claims] 1. A vertically rotating hard shaft, a spherical body support that supports a spherical body fixed to the rigid shaft end, and a spherical support that is provided at symmetrical positions on the vertical axis of the rigid shaft to rotate and lift. And a rotation device for rotating the spherical body by rotating the pressure receiving and rotating device. A rotating device for a sphere, which orbits the sphere and rotates the entire surface of the sphere evenly. 2. The rotating device for a spherical body according to claim 1, wherein the pressure rotating device is arranged horizontally with a drive belt wheel that is rotated by the power of a motor or the like at the end of a moving frame that is raised or lowered by the power of an air cylinder or the like. A plurality of driven belt wheels are provided, the belt is wound around the belt wheel, and a spherical pressing piece is arranged at a spherical vertex contact portion of the horizontal belt portion, and the spherical vertex is moved by the air cylinder device through the belt and the spherical pressing piece. A rotating device for a sphere, characterized in that the sphere can be rotated by causing the belt to endlessly travel by applying pressure and rotating the drive belt wheel. 3. The rotating device for a spherical body according to claim 1, wherein, of the material of the belt forming the pressure rotating device and the material of the spherical body fixed to the vertical axis end, the material of the belt is more than the material of the spherical body. A spherical rotating device characterized by using a material having a large friction coefficient. 4. The sphere rotating device according to claim 1, wherein the sphere holder is formed into a hollow cylindrical shape that holds the sphere at an arbitrary stable angle, and is replaceable according to a diameter group of the sphere. A rotating device for a sphere, characterized in that it can revolve a large diameter sphere from a very small diameter sphere. 5. The rotating device for a spherical body according to claim 1, wherein the pressure rotating device is provided with a roller that is rotated by power of a motor or the like at an end of a moving frame that moves up and down by power of an air cylinder or the like, An apparatus for rotating a sphere, characterized in that an apex of the sphere is pressed by the roller by an apparatus and the sphere is rotatable by rotating the roller.