JP3888280B2 - Rotating body rotation positioning device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary positioning device for a rotating body.
[0002]
[Prior art]
A conventional rotary positioning device for a rotating body is disclosed in, for example, Japanese Patent Laid-Open No. 6-13450. First, the rotating body, which is a rotating body, has a substantially disk shape, and a V notch or an oriental flat is formed on the outer peripheral side. And a rotating body is mounted on the rotation correction tool (rotating body holding | maintenance part) which has an inner surface equal to the outer diameter of a rotating body. Further, a rotary stage that can be rotated by a motor having a rotary encoder is provided below the rotation correction tool, and the rotating body can be rotated by the rotation of the rotary stage. An optical sensor capable of detecting the position of the V-notch or the oriental flat formed in the rotating body is provided below the rotation correction tool.
[0003]
The rotary positioning apparatus for a rotating body having such a configuration rotates the rotary stage and detects the position of the V notch or the oriental flat by an optical sensor.
Then, the rotary position of the motor when the position of the V notch or the oriental flat is detected is detected by the rotary encoder. Based on the detection result, the rotary stage is rotated by a predetermined amount to perform rotational positioning of the rotating body.
[0004]
[Patent Document 1]
JP-A-6-13450 gazette
[Problems to be solved by the invention]
However, the conventional rotary positioning device for a rotating body uses an optical sensor and a rotary encoder, and is a very expensive device.
[0006]
The present invention has been made in view of such circumstances, and an object thereof is to provide an inexpensive rotary positioning apparatus for a rotating body without using an optical sensor or a rotary encoder.
[0007]
[Means for Solving the Problems]
Accordingly, in order to solve the above-described problems, a rotary positioning device for a rotary body according to the present invention includes a rotary body holding means, a rotary shaft, a rotary engagement means, a shaft fixing engagement means, a stopper, and a rotary body engagement. A combining unit and a driving unit. The rotating shaft is stopped by the stopper and the rotation engaging means after at least one rotation. Here, the rotating body has a substantially disk shape and has a rotation positioning portion at an eccentric position. The rotating body holding means is a means for rotatably holding the rotating body. The rotation axis is an axis that is rotatable around the rotation axis of the rotating body. The rotation engagement means is a means that includes a shaft support portion that is rotatably supported on the rotation shaft, and an engagement claw that extends from the shaft support portion in one radial direction. The shaft fixing engagement means is a means that is fixed to the rotation shaft and engages with an engagement claw of the rotation engagement means in the rotation direction. The stopper stops the rotation of the rotation engagement means by coming into contact with the rotation engagement means in the rotation direction. The rotating body engaging means is a means that has a rotational positioning engaging portion that is disposed on one end side of the rotating shaft and can be engaged with the rotational positioning portion of the rotating body. The driving means is means for rotating the rotation shaft.
[0008]
That is, the shaft fixing engagement means rotates as the rotation shaft rotates. The rotation engagement means rotates with the rotation of the shaft fixing engagement means. If it does so, a rotation engagement means will contact | abut to a stopper and rotation will be stopped. Subsequently, the shaft fixing engagement means comes into contact with the rotation engagement means and stops rotating. Therefore, the rotating shaft makes at least one rotation, and makes a maximum of two rotations according to the positions of the shaft fixing engagement means and the stopper before the rotation shaft rotates.
[0009]
At this time, the rotating body engaging means rotates as the rotating shaft rotates. Therefore, the rotation positioning engagement portion of the rotation body engagement means engages with the rotation positioning portion of the rotation body during one rotation of the rotation body engagement means. For example, when the rotation positioning portion is a key groove and the rotation positioning engagement portion is a claw that engages with the key groove, the key groove and the claw are engaged. And when a rotating shaft stops, a rotary body engaging means and a rotary body will stop. That is, the rotating body is positioned at the stopped rotational position.
[0010]
Therefore, the rotational positioning device for a rotating body having such a configuration can freely determine the rotational position of the rotating body by changing the position of the stopper. Furthermore, since this apparatus does not use an optical sensor or a rotary encoder, the apparatus is very inexpensive. In addition, even if it does not use an optical sensor or a rotary encoder, the rotational positioning of a rotary body can be reliably carried out as mentioned above.
[0011]
Further, the rotation positioning device for a rotating body of the present invention further includes intermediate engagement means, and the rotation shaft is stopped by the stopper, rotation engagement means and intermediate engagement means after at least two rotations. Good. The intermediate engagement means is disposed between the rotation engagement means and the shaft fixed engagement means, and has an intermediate shaft support portion rotatably supported by the rotation shaft, and an intermediate shaft support portion fixed to the intermediate shaft support portion. It is a means consisting of an engaging claw and an intermediate engaging claw that engages with the shaft fixing engaging means.
[0012]
Thereby, it can be stopped after rotating the rotating shaft two or more times. That is, the rotating body is positioned after rotating one or more times. For example, the present invention can be applied to a case where the rotating body is placed on a fixed base and the rotating body is fixed to the fixed base by rotating the rotating body one or more times.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in more detail with reference to embodiments.
[0014]
A rotating body positioning device 1 of the present invention is shown in FIG. In the present embodiment, the shape of the workpiece (rotating body) W is substantially cylindrical as shown in FIG. 1, and the key groove Wa for positioning at one place is formed on the inner peripheral surface. A case will be described.
[0015]
As shown in FIG. 1, in the rotating body positioning device 1, a substantially cylindrical work holding portion (rotating body holding means) 3 is fixed on a lower base 2 a of a base 2. The work holding portion 3 is formed so that the inner diameter is substantially equal to the outer shape of the work W. A cylinder 5 is fixed on the upper base 2b of the base 2 so that the elevator 4 can be raised and lowered. Further, two lifting platform guide shafts 6 for guiding the lifting platform 4 to move up and down are provided between the lower platform 2 a and the upper platform 2 b of the base 2.
[0016]
A rotating shaft 7 is rotatably supported on the elevator 4, and a motor (driving means) 8 is attached to the upper end side of the rotating shaft 7. For example, an air motor is used as the motor 8. The rotation center of the rotating shaft 7 coincides with the center of the workpiece holding unit 3 described above. The motor 8 is fixed on the lifting platform 4.
[0017]
A disc-shaped shaft fixing disk (shaft fixing engaging means) 9 is fixed near the center of the rotating shaft 7. That is, the shaft fixed disk 9 rotates together with the rotating shaft 7. Further, the shaft fixing disk 9 has a fixing pin 9a at a position eccentric from the center of rotation on the upper surface side. A rotating claw 10 is placed on the shaft fixed disk 9. The rotating claw 10 has a substantially cylindrical shape and includes a shaft supporting portion 10a that is supported by the rotating shaft 7 and a claw portion (engaging claw) 10b that extends from the shaft supporting portion 10a in one radial direction. The claw portion 10b extends to a position exceeding the eccentric position where the fixing pin 9a of the shaft fixing disk 9 is disposed. That is, the rotating claw 10 freely rotates around the rotating shaft 7 and engages with the fixed pin 9a in the rotating direction.
[0018]
Further, a work engaging portion (rotating body engaging means) 12 is disposed on the lower end side of the rotating shaft 7 so as to be slidable in the vertical direction on the outer peripheral surface of the rotating shaft 7. The work engaging portion 12 includes a cylindrical portion 12a that slides on the outer peripheral surface of the rotating shaft 7, and a disc-shaped disc portion 12b provided on the lower end side of the cylindrical portion 12a. Further, the cylindrical portion 12a of the workpiece engaging portion 12 has three elongated holes 12c that are long in the vertical direction. The elongated hole portion 12 c is engaged with lifting pins 11 provided at three locations on the outer peripheral surface on the lower end side of the rotating shaft 7. Further, the disk-shaped outer diameter of the disk portion 12 b of the work engaging portion 12 is formed to be substantially equal to the inner diameter of the work W. Further, a positioning claw (rotational positioning engagement portion) 12d is formed at one place on the outer peripheral end of the disk portion 12b. The positioning claw 12d is formed in a shape that engages with the keyway Wa of the workpiece W.
[0019]
Further, an elastic body 13 is provided on the outer peripheral surface of the rotating shaft 7 between the shaft fixing disk 9 and the work engaging portion 12, and biases the work engaging portion 12 downward. Yes. For example, a coil spring is used for the elastic body 13.
[0020]
A U-shaped stopper base 14 is attached to the lift base 4, and stoppers 15 are attached to two adjacent surfaces of the stopper base 14. The stopper 15 has the same height as the rotary claw 10 and is attached at a position where it comes into contact with the claw portion 10b of the rotary claw 10 when the rotary claw 10 rotates.
[0021]
Next, the operation of the rotating body positioning device 1 configured as described above will be described with reference to FIGS.
[0022]
First, as shown in FIG. 1, the work W is installed inside the work holding unit 3. At this time, the keyway Wa of the workpiece W may face in any direction. Next, as shown in FIG. 2A, the motor 8 is driven to rotate counterclockwise in the drawing, and the rotary shaft 7 is rotated to a position where the rotary claw 10 and the fixed pin 9 a come into contact with one side of the stopper 15. . This state is the initial state.
[0023]
Next, by driving the cylinder 5, the elevator 4 is lowered according to the elevator guide shaft 6. Then, the lifting platform 4 is stopped at a position where the disk portion 12 b of the workpiece engaging portion 12 presses against the upper surface of the workpiece W by the elastic force of the elastic body 13. That is, the workpiece engaging portion 12 is slightly raised with respect to the rotating shaft 7. At this time, the positioning claw 12d of the workpiece engaging portion 12 is in contact with the outer peripheral upper surface of the workpiece W without fitting with the keyway Wa of the workpiece W.
[0024]
Then, as shown in FIG. 2B, the motor 8 is driven to rotate clockwise in the figure, and the rotating shaft 7 is rotated clockwise in the figure. Along with the rotation of the rotating shaft 7, the shaft fixing disk 9 fixed to the rotating shaft 7 also rotates in the same direction. Further, the rotation claw 10 rotates in the same direction by the rotation of the shaft fixing disk 9. When further rotating, the claw portion 10b of the rotary claw 10 comes into contact with the other side of the stopper 15 as shown in FIG. As shown in FIG. 2D, when the rotating shaft 7 is further rotated in the same direction, the shaft fixing disk 9 continues to rotate. At this time, the rotating claw 10 is stopped in contact with the other side of the stopper 15.
[0025]
Then, when the rotating shaft 7 is further rotated in the same direction, as shown in FIG. 2E, the rotating shaft 7 comes into contact with the rotating claw 10 that has already been in contact with the other side of the stopper 15 and stopped. Therefore, the shaft fixed disk 9 stops because it cannot rotate clockwise. At the same time, the rotating shaft 7 also stops.
[0026]
Therefore, the rotating shaft 7 is rotated by one quarter and three quarters. During this time, the work engaging portion 12 also rotates with the rotation of the rotating shaft 7. That is, the positioning claw 12d of the workpiece engaging portion 12 and the keyway Wa of the workpiece W are fitted until the rotation shaft 7 makes one rotation. That is, the workpiece engaging portion 12 rotates while pressing the upper surface of the workpiece W until the positioning claw 12d and the keyway Wa are fitted. Thereafter, the workpiece engaging portion 12 rotates with the workpiece W until the rotating shaft 7 stops. When the rotary shaft 7 stops, the keyway Wa is positioned at the keyway target position Wa ′ shown in FIG.
[0027]
Furthermore, when performing the rotational positioning of the next workpiece W, the rotational positioning of the workpiece W can be performed by returning the initial state again and performing the above operation.
[0028]
Thus, by making the workpiece engaging portion 12 at least one rotation or more, the keyway Wa of the workpiece W and the positioning claw 12d of the workpiece engaging portion 12 can be fitted. And the workpiece | work W can be positioned reliably by making the position which stops the workpiece | work engaging part 12 by the other side of the stopper 15 into a target position.
[0029]
The rotational positioning position of the workpiece W can be changed by changing the position of the stopper 15 or changing the height of the stopper 15. Moreover, in the said embodiment, although demonstrated as what has the keyway Wa as a rotation positioning part of the workpiece | work W, you may form a notch and oriental flat in addition to this. Furthermore, a pin or hole may be used as a rotational positioning part. In this case, the rotation positioning engagement portion of the workpiece engagement portion 12 is changed in accordance with the rotation positioning portion of the workpiece W.
[0030]
Further, as another embodiment, as shown in FIG. 3, an intermediate rotation claw (intermediate engagement means) 21 may be provided. The intermediate rotating claw 21 has a substantially cylindrical shape and is supported by an intermediate shaft supporting portion 21a that is supported by the rotating shaft 7, and an intermediate claw portion (intermediate engaging claw) 21b that extends from the intermediate shaft supporting portion 21a in one radial direction. The intermediate claw pin 2 (intermediate engagement claw) 1c is formed on the intermediate claw portion 21b. The intermediate rotating claw 21 freely rotates around the rotating shaft 7 and engages with the fixing pin 9a in the rotating direction and engages with the rotating claw 10.
[0031]
In the operation of the rotation positioning device configured as described above, the shaft fixing disk 9, the intermediate rotating claw 21, and the rotating claw 10 rotate as the rotating shaft 7 rotates. Then, before the rotating shaft 7 makes one rotation, the rotating claw 10 comes into contact with the other side of the stopper 15 so that the rotating claw 10 stops. Subsequently, when the rotating shaft 7 further rotates, the shaft fixing disk 9 and the intermediate rotating claw 21 rotate. Then, before the rotation shaft 7 makes two rotations exceeding one rotation, the intermediate claw pin 21c of the intermediate rotation claw 21 comes into contact with the claw portion 10b of the rotation claw 10 to stop the intermediate rotation claw 21. Stop. Subsequently, when the rotating shaft 7 further rotates, the shaft fixing disk 9 rotates. Then, before the rotating shaft 7 makes three rotations exceeding two rotations, the fixing pin 9a of the shaft fixing disk 9 comes into contact with the intermediate claw portion 21b of the intermediate rotating claw 21 stopped, whereby the shaft fixing disk 9 Stops.
[0032]
Along with this operation, the workpiece engaging portion 12 rotates at least two rotations and less than three rotations. That is, the workpiece W is positioned after rotating one or more times. For example, the present invention can be applied to a case where the work W is placed on a fixed base (not shown) and the work W is fixed to the fixed base by rotating it one or more times.
[0033]
【The invention's effect】
According to the rotational positioning device for a rotating body of the present invention, since the rotational positioning of the rotating body can be performed without using an optical sensor or a rotary encoder, a very inexpensive device can be obtained.
[Brief description of the drawings]
FIG. 1 is a view showing a rotary positioning apparatus for a rotating body according to the present invention.
FIG. 2 is an explanatory diagram of a rotational positioning operation.
FIG. 3 is a view showing a rotational positioning device for a rotating body according to another embodiment.
[Explanation of symbols]
2 ・ ・ ・ Base 3 ・ ・ ・ Workpiece holding part (Rotating body holding means)
4 ... Elevator 5 ... Cylinder 7 ... Rotating shaft 8 ... Motor (driving means)
9 ... Shaft fixing disk (shaft fixing engagement means)
10: Rotating claw (rotating engagement means)
10a ... shaft support part 10b ... claw part (engagement claw)
11: Elevating pin 12: Work engaging part (rotating body engaging means)
12d ... Positioning claw (rotating positioning engagement part)
13 ... Elastic body 15 ... Stopper 21 ... Intermediate rotating claw 21a ... Intermediate shaft support part 21b ... Intermediate claw part W ... Workpiece (rotating body)
Wa: Keyway (rotating positioning part)

Claims (2)

In a rotary positioning device for a rotating body that performs positioning in the rotational direction of a rotating body that has a substantially disk shape and has a rotational positioning portion at an eccentric position,
Rotator holding means for rotatably holding the rotator;
A rotating shaft rotatable around the rotating shaft of the rotating body;
Rotation engaging means comprising a shaft support portion rotatably supported by the rotation shaft and an engaging claw extending from the shaft support portion in a radial direction;
Fixed shaft engaging means fixed to the rotating shaft and engaged and rotated in a rotating direction with the engaging claw of the rotating engaging means;
A stopper that stops the rotation of the rotation engagement means by contacting the rotation engagement means in the rotation direction;
A rotating body engaging means provided on one end side of the rotating shaft and having a rotation positioning engagement portion engageable with the rotation positioning portion of the rotating body;
Drive means for rotationally driving the rotating shaft,
The rotary positioning device for a rotating body, wherein the rotary shaft is stopped by the stopper and the rotation engaging means after at least one rotation. Further, an intermediate shaft support portion disposed between the rotation engagement means and the shaft fixing engagement means and rotatably supported by the rotation shaft, and the rotation engagement means fixed to the intermediate shaft support portion. Intermediate engagement means composed of the engagement claw and the intermediate engagement claw engaged with the shaft fixing engagement means,
The rotation positioning device for a rotating body according to claim 1, wherein the rotation shaft is stopped by the stopper, the rotation engagement means, and the intermediate engagement means after at least two rotations.

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