JPH0112164Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an alignment and inner diameter measuring instrument for aligning the inner diameter of a tube or cylinder and measuring the circular diameter.

Conventionally, when aligning the inner diameter of a tube, the proximal end of a cylindrical body is inserted into the measurement target area, and hydraulic pressure is applied from the distal opening to align the inner diameter. There is a problem in that the object to be aligned and measured is deformed, and there is also an alignment method in which a plurality of mandrels are inserted into the object to be aligned and to be measured, but this method has the disadvantage of being inconvenient to handle.

It is an object of the present invention to provide a centering inner diameter measuring instrument that can eliminate these difficulties and also easily perform accurate and fine comparative measurements.

The present invention includes a sliding body that is formed with a tapered surface and reciprocates in the axial direction, and a structure that abuts the tapered surface of the sliding body and presses the tapered surface by sliding contact with the object to be measured, causing the sliding body to slide. In the alignment inner diameter measuring device, the measuring device includes a ball in sliding contact with the sliding body, and a detection and measurement mechanism that detects and measures the sliding value of the sliding body. A ring body is formed in an annular shape and slides on the outer circumferential surface of the shaft rod, and the sliding ring body is connected to the outer circumference of the shaft rod so that the sliding movement due to the pressure of the sliding ball is in the same direction. The centering inner diameter is characterized in that a plurality of the sliding balls are arranged and abutted in an annular chain on the tapered surface of each sliding ring body, and each is supported by a retainer. According to the present invention, which is a measuring device and configured as described above, when the centering inner diameter measuring device is inserted from the head into the inner hole of the object to be aligned, the ball slides into contact with the inner hole wall of the object to be aligned. At the same time as sliding, the sliding ball is pressed in the direction of the axis of the shaft rod, and due to this action, the sliding ball presses and slides the sliding ring body toward the base end of the shaft rod, and the sliding ring body The rear end of
In order to push the contact of the detection measuring device that is in contact with this backward, an operating voltage is generated within the detector in conjunction with the sliding of the contact, and the value of this is determined by the electric micrometer connected to the detector. The information is transmitted to the meter, which calculates and displays the inner diameter value.

Therefore, the centering inner diameter measuring device of the present invention can accurately and quickly measure the centering and inner diameter of objects by simply inserting it from the head into the inner hole of the object to be aligned and the inner diameter of the object to be measured. Since sliding contact balls are used, the sliding contact surface is small, resulting in less frictional resistance during insertion and removal, and steel balls are easily available and can be substituted, making it easy to maintain accuracy. .

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of the present invention, partially in section. Second
The figure is a sectional view taken along the line AA in FIG. 1.

A large-diameter head 2 is fixed to the tip of the shaft 1.
The rear end surface is formed with an annular tapered surface 2a having an inclination angle of 45 degrees from the outer peripheral surface toward the peripheral edge of the shaft rod 1.

Further, the rear end of the shaft rod 1 forms a small diameter portion 3, and a shaft hole 4 is formed from the small diameter portion 3 toward the middle of the base of the shaft rod 1.
A horizontal hole 5 passing through the shaft center of the shaft rod 1 is opened in the shape of a right-angled cross.

Two sliding rings 6 and 6' having inner circumferential surfaces that come into sliding contact with the outer circumferential surface of the axle 1 are fitted onto the axle 1.
One of the sliding rings 6, 6' has tapered surfaces 6a, 6a, . . . formed at the outer periphery of both opening ends thereof, each having an inclination angle of 45 degrees from the outer periphery toward the opening. In addition, the other sliding ring body 6' has the same tapered surface 6'a as described above formed on the outer periphery of the front opening end opposite to the head 2 of the shaft 1, and the sliding ring body 6' has the same tapered surface 6'a as described above at the rear opening wall end. It is positioned so as to pass through the axis of the moving ring body 6', and the horizontal rod 7 is mounted so as to intersect at right angles to the axis of the shaft rod 1, and is fixed with screws 7a.
The thickness of each sliding ring body 6, 6' is configured such that the outer circumference thereof is the same as the outer circumferential surface of the head part 2 when it is fitted onto the shaft rod 1.

The sliding ring bodies 6, 6' are externally fitted onto the shaft rod 2 from the rear end of the shaft rod 1 with the part where the horizontal rod 7 is mounted at the rear. A retainer 9 is arranged with an appropriate number (12 in the figure) of sliding balls 8, 8... arranged in a chain ring so as to be in contact with the surface 2a.
Hold it and place it. The retainer 9 is an annular plate with ball fitting holes formed therein, and its diameter is slightly smaller than the diameter of the head 2.

First, the sliding balls 8, 8... are fitted to the shaft rod 1 together with the retainer 9, and then the sliding ring body 6 is fitted,
Next, the sliding balls 8, 8... are fitted together with the retainer 9, and then the sliding ring body 6' with the horizontal rod 7 is fitted.
In this case, the horizontal rod 7 is removed, the sliding ring body 6' is fitted into the shaft rod 1, the horizontal rod 7 is inserted into the horizontal hole 5 at the base of the shaft rod 1, and the sliding A horizontal rod 7 is fixed to the ring body 6'. As a result, the sliding rings 6, 6' and the sliding balls 8, 8, . . . are positioned.

However, the shaft rod 1 of the lever has a thread 3a threaded on the outer peripheral edge of its small diameter portion 3, and is screwed into an internal thread 10a threaded into the inner hole of the tip end of the handle body 10.

The handle body 10 has a tubular shape, and a fitting sliding contact portion 11 is fixed to the distal end. The fitting sliding contact portion 11
has a tubular shape with a larger diameter than the outer diameter of the handle body 10, and the diameter of its inner hole is configured to be in sliding contact with the outer periphery of the sliding ring body 6'. The rear part of the sliding ring body 6' is configured to be fitted,
In addition, a spring 12 is interposed between the base end wall of the inner wall of the fitting sliding contact portion 11 and the rear end of the sliding ring body 6' in an externally fitted manner on the shaft rod 1, so that the sliding ring bodies 6, 6 are always connected to each other. ' is pressed in two directions on the head.

A detector 14 of a detection and measuring device is inserted into the shaft hole 4 of the shaft 1 through a fixing member 13 in the inner hole of the small diameter portion 3, and a contactor that slides back and forth is attached to the tip of the detector 14. 14a is brought into contact with an anvil 15 fixed to the center of the rear surface of the horizontal rod 7.

The detection measuring device is a differential voltage measuring mechanism, and the rear part of the detector 14 is extended into the handle part 10, and the conductive wire 14b at the rear part passes through the rear cover body 10b of the handle part 10 in a supported manner. Extending the conductive wire 14
The extending end of b is connected to an electric micrometer (not shown).

Since the present invention is constructed as described above, when the shaft rod 1 is inserted from the head 2 into the inner hole of the object to be aligned and the inner diameter measured, as shown in FIG.
The end of the inner hole 6 contacts the outer surface of the sliding balls 8,8. Here, when the head 2 is inserted in the direction of the arrow (right side in the figure), the inner hole wall of the object to be aligned and measured 16 slides into contact with the balls 8, 8 toward the proximal end of the shaft rod 1 (the right side in the figure). The sliding balls 8, 8 are pressed in the axial direction of the shaft rod 1 while pushing the sliding balls 8, 8 toward the upper left. As mentioned above, the sliding balls 8, 8 are attached to the tapered surface 2a of the head 2.
and the tapered surfaces 6a, 6'a of the sliding rings 6, 6', and these tapered surfaces 6a, 6'a... have an inclination angle of 45 degrees with respect to the outer surface of the shaft rod 1. Sliding friction occurs between the sliding balls 8, 8 pressed against the centering and measuring object 16 and the tapered surface, and the head 2 is fixed to the shaft rod 1, and the sliding ring body 6 is Since it is movable, the sliding ring body 6 slides toward the rear end of the shaft rod 1 (toward the left in the figure) as shown by the arrow in the figure. When the end of the inner hole of the object to be measured 16 moves around the sliding ring 6 on the head 2 side and comes into contact with the second row of sliding balls 8', 8', it is the same as described above. As a result, the rear sliding ring 6' also moves toward the handle portion 10, and the Albin 15 pushes the contact 14a of the detector 14. A sliding rod is connected to the contactor 14a, and the sliding of the sliding rod generates a differential voltage inside the detector 14, and the differential voltage is transmitted via a conductive wire 14b (not shown). The differential voltage value is transmitted to the electric micrometer and converted and displayed as the inner diameter value of the object 16 to be aligned and the inner diameter to be measured. For example, when the object 16 to be aligned reaches the second row of sliding balls, four times the difference in the size range of the inner diameter of the object 16 to be aligned is transmitted to the detector 14 as the thrust movement amount. , in the case of only the first row of sliding balls, twice the amount is transmitted.
Therefore, the sensitivity of the amplifier is 1/4 or 1/2
Adjust and use.

Even when this measuring device is inserted into the inner hole of the object 16 to be aligned, the fitting sliding contact portion 11 also serves as a stopper, so the measurement position can always be specified, and the spring 12 does not slide when not measuring. Since the movable ring bodies 6, 6' are pressed in the two directions of the head, the detection and measurement device does not work.

Since the present invention is constructed and operates as described above, when the detector of the present measuring device is inserted into the inner hole of the object to be aligned, all the sliding balls 8, 8, . . . 'a is pressed against the shaft core of the shaft. However, the rear sliding ring 6' has springs 12.
Since the sliding balls 8, 8, . . . are pressed radially outward from the shaft center of the shaft rod. Here, since there is no mutual difference in the diameter of each of the sliding balls 8, 8, and the tapered surfaces 2a, 6a, 6'a are machined with high precision, each of the tapered surfaces 2a, 6a,
The core of 6'a and the core of the object to be aligned will match,
Therefore, accurate and fine comparison measurements can be made simply by inserting this alignment inner diameter measuring instrument into the inner hole of the object to be aligned, and since the sliding ball acts like a bearing, it is possible to measure the inner diameter of the object to be aligned. The area in contact with the hole wall is small, making it easy to insert and remove, and also has the advantage of being rotatable. In addition, it is also possible to measure the inner diameter, and while conventional hydraulic models were only able to measure up to 5 μm, the measuring instrument of the present invention has a high accuracy of up to 1.5 μm in inner diameter measurements.

Note that since there is a natural limit to the amount of sliding of the sliding ball in the axial direction, different measuring object scales are prepared.

The device shown in Fig. 1 is suitable for measuring the inner diameter, but if at least three of these are arranged in parallel and their axes are arranged at the apex of an equilateral triangle, they can be fitted around the outer circumference of the object to be measured. It is also possible to measure the outer diameter.

[Brief explanation of the drawing]

The drawings relate to the present invention, and Fig. 1 is a side view with a partial cross section of the alignment inner diameter measuring instrument, and Fig. 2 is A of Fig. 1.
-A sectional view, and FIG. 3 is a sectional view of a main part for explanation. 1... Axis rod, 2... Head, 3... Small diameter part, 4...
...Shaft hole, 5...Horizontal hole, 6, 6'...Sliding ring body, 2
a, 6a, 6'a...Tapered surface, 7...Horizontal rod, 7
a... Screw, 8, 8'... Sliding ball, 9... Retainer, 10... Handle part, 10a... Female thread part,
10b... Rear lid body, 11... Fitting sliding contact portion, 12...
...Spring, 13...Fixing member, 14...Detector, 1
4a...Contact, 14b...Conducting wire, 15...Anvil, 16...Inner diameter measurement object to be aligned.

Claims (1)

[Claims for Utility Model Registration] A sliding body that is formed with a tapered surface and reciprocates in the axial direction, and a sliding body that comes into contact with the tapered surface of the sliding body and presses the tapered surface by sliding contact with an object to be measured. In the aligning inner diameter measuring device, which comprises a sliding ball configured to move, and a detection and measurement mechanism that detects and measures the sliding value of the sliding body, the sliding body is moved around the opening from the outer circumferential surface to the opening. The inclined taper surface is formed in an annular shape and is formed into a ring body that slides on the outer peripheral surface of the shaft rod, and the sliding ring body is attached to the outer circumference of the shaft rod so that the sliding movement due to the pressure of the sliding ball is in the same direction. A plurality of the sliding balls are arranged in an annular chain shape on the tapered surface of each sliding ring body and brought into contact with each other, and each of the sliding balls is supported by a retainer. An alignment inner diameter measuring device.