JPH0517636Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to a rotating device for a rotating object used to measure the runout of a rotating object such as a video cylinder.

(Prior art) For example, after manufacturing a small, lightweight rotating object such as a video cylinder that is manufactured to high-precision dimensions and requiring high-precision rotational drive, the rotating object is actually rotated and shaken. When trying to measure , the following method is generally adopted.

The system shown in Fig. 3 is a system in which a rotating object b is rotatably supported on a vertically erected main shaft a, and the rotating object b is rotated by hand.
This is a system in which a friction wheel e, which is rotationally driven by a motor d, is brought into contact with the outer circumferential surface c of a rotating object b that is rotatably supported, and the one shown in Fig. 5 is rotated by a motor f. In this system, a rotating object b is supported and rotated via a chuck h at the tip of a spindle g. In any of the above methods, the rotating object b
A gap sensor (not shown) or the like is provided in close proximity to the outer circumferential surface c of the rotating object b, and the deflection of the outer circumferential surface c of the rotating object b is measured to determine the quality.

(Problems to be Solved by the Invention) However, the method for imparting rotation to a rotating object configured as described above has the following problems. First of all, in the case of the one in Figure 3, since the rotating object is rotated by touching it, extra force is applied to the rotating object, and the reliability of the measured value is low.Furthermore, it gets fingerprints and dirt, and the rotating object does not like to get dirty. It cannot be used for objects. The systems shown in Figures 4 and 5 mechanically apply rotational driving force to the rotating object, so the drive mechanism itself must be manufactured with high precision, which increases costs and There are circumstances in which it is difficult to transfer and automation is difficult.

This invention was made with attention to the above-mentioned circumstances, and its purpose is to allow the rotating object to rotate in a stable state without applying any extra external force, and to prevent the rotating object from becoming dirty. An object of the present invention is to provide a rotating device for rotating objects that is free from damage.

[Structure of the idea]

(Means and effects for solving the problem) This invention provides a rotation imparting mechanism that blows compressed air onto a rotatably supported rotating object from the tangential direction and diagonally above to rotate the rotating object. The structure is such that rotational force can be applied in a non-contact manner.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

FIG. 1 shows the entire rotating device used to measure the runout of a video cylinder. Reference numeral 1 denotes a base, and a mounting table 2 serving as a reference surface is provided on the upper part of the base. On the upper surface of this mounting table 2, a rotating object 3 such as a video cylinder as an object to be measured is rotatably supported around its axis 4. Further, a first rotation applying mechanism 5 and a second rotation applying mechanism 6 for applying rotational force to the rotating object 3 are installed near the base 1. Since the first and second rotation imparting mechanisms 5 and 6 basically have the same structure, one of them will be explained. Reference numeral 7 is a nozzle stand. This nozzle stand 7 is composed of a vertical shaft 8 and a horizontal shaft 9 supported so as to be vertically movable with respect to the vertical shaft 8. A rotatable bracket 10 is attached to the tip of the horizontal shaft 9 to hold the nozzle. 11 is installed. The nozzle 11 can be oriented in any direction relative to the rotating object 3 by rotating the bracket 10, and the height of the nozzle 11 relative to the rotating object 3 can be adjusted on the horizontal axis relative to the vertical axis 8. It is constructed so that it can be carried out by vertical movement of 9. Further, the nozzle 11 is connected via a pipe 12 to an air supply source 13 such as an air compressor. An on-off valve 14 consisting of a solenoid valve or a manual valve and a flow rate adjustment valve 15 are provided in the middle of this pipe 12, so that the flow rate of compressed air blown from the nozzle 11 to the rotating object 3 can be adjusted. It's getting old.

Of the first and second rotation imparting mechanisms 5 and 6 configured in this way, in this embodiment, the first rotation imparting mechanism 5 blows compressed air in the tangential direction of the rotating object 3 through the nozzle 11. is set,
The nozzle 11 is set so that the second rotation imparting mechanism 6 sprays compressed air onto the rotating object 3 from diagonally above. In other words, it is configured such that compressed air can be blown onto the rotating object 3 from the tangential direction and from diagonally above. Further, a gap sensor 16 is installed close to the outer peripheral surface 3a of the rotating object 3, and is connected to a display device (not shown) via a signal line 17.

Next, the operation of measuring the runout of the rotating object 3 using the rotating device configured as described above will be explained. First, when the on-off valve 14 is opened with the rotating object 3 rotatably supported on the mounting table 2, compressed air is blown from the nozzle 11 of the first rotation imparting mechanism 5 in the tangential direction of the rotating object 3. Can be attached. At the same time, compressed air is blown from the nozzle 11 of the second rotation imparting mechanism 6 from diagonally above the rotating object 3. Therefore, the rotating object 3 gradually starts rotating due to the compressed air pressure. At this time, if the rotational force is insufficient, the flow rate can be controlled by adjusting the flow rate with the flow rate adjustment valve 15 and by changing the angle of the nozzle 11 with respect to the rotating object 3. In this way, runout can be measured by the gap sensor 16 while the rotating object 3 is rotating. When the measurement is completed, the rotation of the rotating object 3 can be stopped by closing the on-off valve 14 and stopping the supply of compressed air.

In the above embodiment, the runout is measured using a gap sensor, but this is merely an example, and other measuring instruments may be used.

Furthermore, this invention is not limited to measuring the runout of video cylinders, but can be applied to measuring the runout of small and lightweight rotating objects.

[Effect of idea]

As explained above, according to this invention, a rotating object can be rotated in a non-contact state, no extra external force is applied to the rotating object, and Since compressed air is blown from above, the rotating object can be pressed against the reference surface and can be rotated in a stable state. Therefore, it does not stain or damage rotating objects, and can be applied to, for example, measuring the runout of video cylinders and the like, allowing highly accurate measurement. Furthermore, it is possible to easily transfer rotating objects, and automation of measurement becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a rotating device showing an embodiment of this invention, Fig. 2 is a configuration diagram showing a compressed air supply system, and Figs. 3 to 5 show a conventional rotation system for rotating objects. FIG. 3 is a schematic side view. 3... Rotating object, 5, 6... Rotation imparting mechanism, 11
... Nozzle, 13 ... Air supply source, 15 ... Flow rate adjustment valve.

Claims (1)

[Scope of utility model registration request] A mounting table having a reference surface that supports a rotating object with its axis perpendicular and rotatable about the axis; and at least 2 rotating objects by spraying compressed air from diagonally above.
1. A rotating device for a rotating object, comprising: a rotation imparting mechanism for a base; and a sensor that is provided close to the outer peripheral surface of the rotating object and measures shake of the rotating object.