JP2008145144A - Calibrating device of inside measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a calibrating device easy to calibrate an inside measuring device such as a cylinder gage. <P>SOLUTION: The calibrating device of the inside measuring device has a pair of jaws 2 and 3 placed at a predetermined interval and a pedestal 4 provided between the jaws 2 and 3 for mounting the internal measure. The pedestal 4 has a pedestal base 41 having a shaft groove 41a and a stage 42 having a rotary shaft 42a, thus making a seesaw structure with the rotary shaft 42a serving as an axis. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a calibration device that can easily calibrate an inner measuring instrument such as a cylinder gauge.

  The inner measuring device measures an inner diameter of a cylinder, a ring, or the like, and a typical example is a cylinder gauge 50 as shown in FIG. The cylinder gauge 50 includes a measuring unit 51 provided at one end of the support rod 55 and a meter 56 provided at the other end and displaying the length of the measuring unit 51. The measuring unit 51 has an anvil 52 having a predetermined length protruding perpendicularly to the support bar 55, and protrudes to the opposite side of the anvil 52, and retracts when pushed to the anvil 52 side and returns to its original state when released. It comprises a probe 53 and a guide 54. The measuring element 53 is directly connected to the meter 56, and the length between the anvil 52 and the tip of the measuring element 53 (the width of the measuring unit 51) is displayed on the meter 56. For example, when measuring the inner diameter of a cylinder using the cylinder gauge 50, the tip of the anvil 52 and the measuring element 53 is applied to the inside of the cylinder, and the width of the measuring part 51 is changed while slightly changing the inclination of the cylinder gauge 50. The position indicating the minimum value is searched, and the value indicated by the meter 56 at that time is set as the inner diameter of the cylinder. Such an inner measuring device represented by a cylinder gauge or the like needs to be calibrated by a calibration device such as a reference device because the length of the measuring section must match the value displayed on the meter.

  As an example of a conventional calibration device for an inner measuring instrument, Japanese Patent Laid-Open No. 10-9803 (Patent Document 1) discloses a fine movement by a sliding reference body 62 fixed on a machine base 61 and a linear gauge 60 as shown in FIG. A reference device having an adjustable sliding reference body 63 and arcuate concave surfaces 66 and 67 formed on reference surfaces 64 and 65 provided on the fixed reference body 62 and the sliding reference body 63, respectively. is doing. For example, when the cylinder gauge 50 is calibrated using this reference device, the width between the arc-shaped concave surfaces 66 and 67 is fixed to a predetermined value in advance, and as shown in FIG. Set both ends of the measurement unit 51 (tips of the anvil 52 and the probe 53) to the arc-shaped concave surfaces 66 and 67, respectively, obtain the minimum value indicated by the measurement unit 51 while slightly changing the inclination of the cylinder gauge 50, Calibration is performed by comparing the values of the widths of the arcuate concave surfaces 66 and 67. However, in the above reference device, calibration is performed with the measurement unit 51 of the cylinder gauge 50 floating in the air, so that both ends of the measurement unit 51 are shaken due to camera shake or the like when changing the tilt of the cylinder gauge 50, It is difficult to obtain the minimum value of the measurement unit 51.

Japanese Patent Laid-Open No. 10-9803

  Accordingly, an object of the present invention is to provide a calibration device that can easily calibrate an inner measuring instrument such as a cylinder gauge.

  As a result of diligent research in view of the above-mentioned object, the present inventors provided a pedestal having a seesaw structure between a pair of calibration jaws, and calibrated while placing an inner measuring device on the pedestal, whereby the inner side The present inventors have found out that shaking during calibration of a measuring instrument can be prevented and calibration becomes easy, and the present invention has been conceived.

  That is, the calibration device for the inner measuring instrument of the present invention has a pair of jaws installed at a predetermined interval, and a pedestal for placing the inner measuring instrument provided between the jaws, The pedestal includes a pedestal having a shaft groove and a stage having a rotating shaft, and has a seesaw structure with the rotating shaft as an axis.

  The axial groove is preferably an arc-shaped long groove or a linear long groove. It is preferable that a V receiver is provided on the stage. It is preferable that the stage can be fixed at a predetermined angle.

  It is preferable that a tapered guide groove is provided at the upper center of the surface of the first and second jaws on the side on which the inner measuring device is set, and the first and second jaws provide the guide groove. It is preferable to comprise a guide portion having a measuring portion for setting the inner measuring device.

  The calibration apparatus of the present invention performs calibration while placing the inner measuring device on a pedestal having a seesaw structure provided on the base between a pair of calibration jaws. It is possible to prevent shaking and to perform calibration easily.

[1] Calibration Apparatus for Inner Measuring Instrument FIGS. 1 and 2 show an inner measuring instrument calibration apparatus 1 according to an embodiment of the present invention. The calibration device 1 includes (1) a pair of clamps 6a and 6b fixed at both ends via a stator 10 and a female screw part 11, and (2) a rectangular parallelepiped lower portion inserted between the clamps 6a and 6b. Jaws 2 and 3 in which reference surfaces 2a and 3a are respectively provided on a flat plate upper part, (3) a block gauge 5 sandwiched between the lower parts of the jaws 2 and 3, and (4) between the jaws 2 and 3 A pedestal 4 provided on the clamps 6a and 6b, (5) a screw rod 13 which penetrates into the female thread portion 11 and presses the jaw 3 through the presser 12, and (6) both ends of the clamps 6a and 6b. It comprises bases 14a and 14b that stabilize the calibration device 1 by sandwiching, and (7) a handle 15 provided on the side surface of the base 14a for placing a hand during the calibration work.

  The lower part of the jaw 2 is in contact with the stator 10, and the lower part of the jaw 3 is pressed by the screw rod 13 through the pressing element 12. As a result, the jaws 2 and 3 are fixed from both sides with the block gauge 5 sandwiched therebetween, so that the length between the reference surfaces 2a and 3a of the jaws 2 and 3 coincides with the length of the block gauge 5. Therefore, by using the block gauge 5 having an appropriate length according to the width of the measurement part of the cylinder gauge to be calibrated, various cylinder gauges having different measurement part lengths can be calibrated. Further, guide grooves 21 and 31 for smoothly inserting the cylinder gauge are provided at the upper center of the reference surfaces 2a and 3a of the jaws 2 and 3, respectively. As shown in Fig. 3, by inserting both ends of the measuring part of the cylinder gauge through the guide grooves 21 and 31, respectively, the cylinder gauge located under the guide grooves 21 and 31 can be quickly and accurately calibrated. Can lead to. Further, by increasing the widths of the reference surfaces 2a and 3a, it is possible to prevent both ends of the measurement unit 53 from being detached during calibration.

As shown in FIG. 4, the pedestal 4 includes a pedestal portion 41 having a shaft groove 41a formed of an arcuate long groove, and a stage 42 having a rotating shaft 42a. The stage 42 has a flat upper surface. A rubber-like flat plate may be provided on the upper surface of the stage 42. The stage 42 can be rotated around the rotation shaft 42a, and can slide along the arcuate shaft groove 41a.

[2] Calibration Method for Inner Measuring Device FIGS. 5 and 6 are views showing a state in which the cylinder gauge 50 is calibrated using the calibration device 1. The cylinder gauge 50 is inserted between the jaws 2 and 3 so that both ends of the measuring part 51 of the cylinder gauge 50 are along the guide grooves 21 and 31, and the measuring part 51 is placed on the stage 42 of the base 4. . At this point, both ends of the measuring part 51 of the cylinder gauge 50 are not provided with locations for calibrating the cylinder gauge on the reference surfaces 2a and 3a of the jaws 2 and 3 (the guide grooves 21 and 31 of the reference surfaces 2a and 3a are not provided). It is located in the lower center.

  Calibration is performed by changing the tilt of the cylinder gauge 50 in the direction of the arrow shown in FIG. 5 or rotating the cylinder gauge 50 around the support rod 55 with the measuring part 51 of the cylinder gauge 50 placed on the stage 42. I do. Since the stage 42 has a seesaw structure with the rotation axis 42a as an axis, the inclination of the stage 42 can be changed in accordance with the inclination of the cylinder gauge 50. Thereby, the inclination of the cylinder gauge 50 can be adjusted smoothly, and highly accurate calibration can be easily realized. Further, when the calibration is performed by changing the inclination of the cylinder gauge 50, the shaft groove 41a of the base 4 is an arc-like long groove, so that the stage 42 is adapted to the change in the inclination of the measuring unit 51 as shown in FIG. Can follow.

  Since the upper surface of the stage 42 is flat, the movement of the support rod 55 of the cylinder gauge 50 in the rotational direction can be performed smoothly. Thus, by providing the stage 42 having the seesaw structure on the pedestal 41 having the arc-shaped shaft groove 41a and placing the measuring unit 51 of the cylinder gauge 50 thereon, the position adjustment in the vertical direction and the rotation direction is not hindered. Therefore, the calibration can be easily performed with high accuracy by preventing shaking.

  Calibration may be performed by changing the inclination of the cylinder gauge 50, and the inclination of the stage 42 may be fixed by a fixing means (not shown) such as a screw when the length of the measurement unit 51 is minimized. Accordingly, when the calibration is performed by moving the cylinder gauge 50 in the rotation direction of the support rod 55, the cylinder gauge 50 is prevented from shaking in the vertical direction, and more efficient calibration is possible.

  The pedestal 4 according to the present invention is not limited to the one having a flat upper surface as shown in FIG. 4, and for example, as shown in FIG. Also good. Thereby, it is possible to prevent the rotation of the support rod of the cylinder gauge in the rotational direction. Further, the long groove 41a of the pedestal portion 41 is not limited to the arc shape as shown in FIG. 4, but may be a linear shape as shown in FIG. The shape of the rotating shaft 42a of the stage 42 is not limited to the illustrated cylindrical shape, and may be a kamaboko shape or the like.

  The jaws 2 and 3 are made of a high-hardness material such as steel so that the width of the jaws 2 and 3 does not change even when a cylinder gauge is inserted. Therefore, in order to easily process the guide grooves 21 and 31, only the upper part of the jaws 2 and 3 where the guide grooves 21 and 31 are provided may be separated and a material that can be easily processed may be used.

  In the illustrated calibration apparatus, the jaw 3 is fixed by being pressed by the pressing portion 12, but the present invention is not limited to this, and a device for fine adjustment such as a micrometer is attached to the jaw 3 so that the position of the jaw 3 can be finely adjusted. Adjustment may be possible.

  The calibration apparatus according to the present invention is not limited to the above-described one, and can have various structures as long as it does not depart from the idea of the present invention.

It is a perspective view which shows the calibration apparatus of the inner side measuring device by one Example of this invention. It is sectional drawing which shows the calibration apparatus of FIG. It is a figure which shows the use condition of the calibration apparatus of FIG. It is a perspective view which expands and partially shows the base of the calibration apparatus of FIG. It is a figure which shows the use condition of the calibration apparatus of FIG. It is a perspective view which shows a base. It is a figure which shows the use condition of the calibration apparatus of FIG. It is a figure which shows a cylinder gauge. It is a perspective view which shows an example of the conventional calibration apparatus. It is a figure which shows the use condition of the conventional calibration apparatus.

Explanation of symbols

1 ... Calibration device 2,3 ... Jaw 4 ... Pedestal
41 ... pedestal
41a ・ ・ ・ Shaft groove
42 ... Stage
42a ・ ・ ・ Rotating shaft
42b ・ ・ ・ V groove 5 ・ ・ ・ Block gauge
6a, 6b ・ ・ ・ Clamp
10 ... Stator
11 ... Female thread
12 ... Presser
13 ... Threaded rod
14a, 14b ... foundation
15 ... Toride
50 ... Cylinder gauge
51 ・ ・ ・ Measurement unit
52 ... Anvil
53 ... Sensor
54 ... Guide
55 ... Support rod
56 ... Meter

Claims (7)

A calibration device for an inner measuring instrument having a pair of jaws installed at a predetermined interval and a pedestal for placing the inner measuring instrument provided between the jaws, the pedestal having a shaft groove A calibration apparatus for an inner measuring instrument, comprising: a pedestal having a stage and a stage having a rotation axis; and a seesaw structure having the rotation axis as an axis. 2. The calibration device for an inner side measuring instrument according to claim 1, wherein the shaft groove is an arc-shaped long groove. 2. The calibration device for an inner side measuring instrument according to claim 1, wherein the shaft groove is a linear long groove. 4. The calibration apparatus for an inner measuring instrument according to claim 1, wherein a V receiver is provided on the stage. 5. The calibration device for an inner side measuring instrument according to claim 1, wherein the stage can be fixed at a predetermined angle. 6. The calibration device for an inner measuring instrument according to claim 1, wherein a taper-shaped guide groove is provided at a central upper portion of a surface of the first and second jaws on the side where the inner measuring instrument is set. Calibration device characterized by that. 7. The calibration apparatus for an inner measuring instrument according to claim 6, wherein the first and second jaws comprise a guide part having the guide groove and a measuring part for setting the inner measuring instrument.

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