JP5822164B2 - Master ring gauge - Google Patents

Description

  The present invention relates to a mastering gauge used for zero adjustment and calibration of various measuring instruments such as a cylinder gauge, an inner micrometer, and an inner dial comparator.

  Conventionally, a master ring gauge of this type having a structure shown in Japan Precision Measuring Instruments Industry Association Standard JMAS 4008-1988 is known.

  Thus, at the time of zero adjustment or calibration, as a preparatory work, for example, in a measurement inspection room under a set constant temperature environment at a temperature of 20 ° C. ± 1 ° C. and a humidity of 50% ± 5% to a humidity of 60% ± 5%. Place a measuring instrument to be adjusted to zero and calibrate, and place a mastering gauge on a temperature-controlled surface plate in the same measurement inspection room, and minimize the temperature difference between the measuring instrument and the mastering gauge to reduce measurement errors. In order to minimize the temperature, for example, the temperature is conditioned for about 8 hours to 12 hours.

  In addition, there is a known structure in which a protective ring is arranged on the outer periphery of the ring gauge. By arranging the protective ring, dirt on the hand does not adhere to the ring gauge even if it is grasped with bare hands. The protective ring protects the ring gauge from external forces due to unforeseen drop collisions, preventing the ring gauge from being broken or damaged, and the reference gauge hole from being damaged, or the body temperature can be adjusted by hand during zero adjustment or calibration. It will be prevented from being transmitted directly to the ring gauge.

Utility model registration No. 3125109 Japanese Utility Model Sho 60-11501

  However, in the case of the conventional structure, the bottom surface of the ring gauge and the bottom surface of the protective ring are formed flush with each other, and the surface of the surface plate under the temperature acclimation includes the bottom surface of the ring gauge and the bottom surface of the protective ring. Because of this, the temperature is transferred from the surface of the temperature-controlled surface plate to both the ring gauge and the protective ring, and there are differences in the material of the ring gauge and protective ring. The temperature transfer from the surface of the panel to the ring gauge becomes slow, and there is a disadvantage that it takes time to acclimate the temperature of the ring gauge.

  The present invention aims to solve these disadvantages. Among the present inventions, the invention according to claim 1 is provided on the outer peripheral portion of a ring gauge having a reference gauge hole serving as a reference for various measuring instruments. A protective ring is arranged, and the bottom surface of the ring gauge protrudes from the bottom surface of the protective ring so that only the bottom surface of the ring gauge directly contacts the surface of the temperature-controlled surface plate. Is in the mastering gauge.

The invention described in claim 2 is characterized in that the upper surface of the ring gauge is immersed from the upper surface of the protective ring, and the invention described in claim 3 is characterized in that the protective ring The nominal dimension as the inner diameter value of the reference gauge hole, an error value between the nominal dimension and the actual dimension, and a measurement index indicating the direction and position of the measurement axis of the actual dimension are displayed on the upper surface. It is.

  According to a fourth aspect of the invention, the protective ring is made of an aluminum alloy, and the fifth aspect of the invention is characterized in that the ring gauge is made of alloy tool steel, carbide. It consists of an alloy or ceramics.

  As described above, according to the present invention, since the bottom surface of the ring gauge protrudes from the bottom surface of the protective ring, the surface of the surface plate in which only the bottom surface of the ring gauge is temperature-controlled. The temperature of the surface of the temperature-controlled surface plate is quickly transmitted to the ring gauge, so that it is possible to shorten the temperature break-in time as a preparatory work. The zero point adjustment and calibration work of the measuring instrument can be speeded up.

Further, in the invention according to claim 2, since the upper surface of the ring gauge is immersed from the upper surface of the protective ring, even if the ring gauge is inverted on the surface plate, The upper surface of the gauge and the reference gauge hole do not touch the surface plate, the upper surface of the ring gauge and the reference gauge hole can be prevented from being damaged, and the handleability can be improved. In this case, a nominal dimension as an inner diameter value of the reference gauge hole, an error value between the nominal dimension and the actual dimension, and a measurement index indicating the direction and position of the measurement axis of the actual dimension are displayed on the upper surface of the protective ring. From this, it is possible to easily recognize the imprint position of the actual dimension of the reference gauge hole in the zero point adjustment of various measuring instruments, and the zero point adjustment accuracy and the calibration accuracy can be improved.

  In the invention according to claim 4, since the protection ring is made of an aluminum alloy, the weight can be reduced and the corrosion resistance can be improved, and the invention according to claim 5 is provided. The ring gauge is made of alloy tool steel, cemented carbide, or ceramics. The ring gauge made of alloy tool steel is excellent for impact resistance and the like, and is made of a cemented carbide ring gauge. Can be wear-resistant and have a long service life, and since the coefficient of thermal expansion is small, there is little change due to temperature, and because of its high hardness, the surface is hardly scratched, gauge management is easy, and the ceramic ring Gauges have superior wear resistance compared to steel and are resistant to secular change, so there is no dimensional change, there is no concern about corrosion, etc. Plastic by marks Change is small, it is easy to measure and maintenance management at lightweight.

1 is a perspective view of a first embodiment of the present invention. 1 is an exploded perspective view of a first embodiment of the present invention. It is a top view of the 1st example of an embodiment of the invention. 1 is a cross-sectional view of a first embodiment of the present invention. It is an expanded sectional view of the example of the 1st embodiment of the present invention. It is a perspective view of the second embodiment of the present invention. It is a top view of the 2nd example of an embodiment of the invention. It is sectional drawing of the 2nd example of implementation of this invention.

  1 to 8 show an embodiment of the present invention, FIGS. 1 to 5 show a first embodiment, and FIGS. 6 to 8 show a second embodiment.

  In the first embodiment shown in FIGS. 1 to 5, reference numeral 1 denotes a ring gauge, which is formed in a ring shape having a reference gauge hole 2 that serves as a reference for various measuring instruments, and is made of alloy tool steel (JIS symbol: SKS or SKT). ) And other steel materials, cemented carbide, or ceramics such as zirconia, and the protective ring 3 is arranged on the outer periphery of the ring gauge 1, and in this case, the protective ring 3 is made of an aluminum alloy and colored anodized. A fitting recess 3c is formed in the protective ring 3, and the outer peripheral surface of the ring gauge 1 is bonded and fixed to the inner peripheral surface of the fitting recess 3c with, for example, an adhesive.

  4 and 5, the bottom surface 3a of the protective ring 3 is made to contact the bottom surface 1a of the ring gauge 1 so that only the bottom surface 1a of the ring gauge 1 is in direct contact with the surface of the temperature-controlled surface plate J. Further, for example, a minute protrusion amount H of 0.1 mm to 0.5 mm is protruded and configured.

Further, in this case, as shown in FIG. 1, the upper surface 1 b of the ring gauge 1 is arranged so as to be immersed from the upper surface 3 b of the protective ring 3.

In this case, as shown in FIG. 1, the nominal dimension M as the inner diameter value D of the reference gauge hole 2 is displayed on the upper surface 3b of the protective ring 3. In this case, since the inner diameter value D is 10 mm, the nominal dimension M is “ No. 10 ”is displayed, and an error value N between the nominal dimension M and the actual dimension is displayed. In this case, since the actual dimension is 9.9991 mm, the error value N is displayed as“ Actual -0.0009 ”. ing.

F is a measurement index. In this case, as shown in FIG. 1, it is formed into a black triangular mark, formed by laser printing or the like, and the measurement axis X of the actual dimension is formed on the upper surface 3b of the protective ring 3. The direction and position are displayed.

  In this case, as shown in FIG. 1 and FIG. 2, two annular anti-slip uneven portions 4 are formed on the outer peripheral surface of the protective ring 3 to prevent the protective ring 3 from slipping and falling when the protective ring 3 is gripped and lifted. The top part 4a and the bottom part 4b of the non-slip uneven part 4 are formed in an arc surface, and the outer peripheral surface of the protective ring 3 placed on the surface plate J is placed on the outer peripheral surface of the protective ring with the thumb and the index finger. A plurality of non-slip gripping portions 5 for preventing horizontal slipping out in the horizontal direction S perpendicular to the axial direction of the reference gauge hole 2 of the protective ring 3 due to the presence of the annular anti-slip uneven portion 4 when sandwiched by In this case, six are formed on a 60 degree equidistant arrangement.

  Since the first embodiment of the present embodiment has the above-described configuration, the bottom surface 1a of the ring gauge 1 is disposed so as to protrude from the bottom surface 3a of the protective ring 3 as shown in FIGS. Will be in direct contact with the surface of the temperature-controlled surface plate J, and the temperature of the surface of the surface-controlled surface plate J in the measurement / inspection room will be quickly transmitted to the ring gauge 1. Therefore, it is possible to reduce the temperature acclimation time of the ring gauge 1 and to suppress variations in the temperature of the ring gauge 1. In addition, the zero point adjustment and calibration of various measuring instruments can be speeded up.

In this case, as shown in FIG. 1, the upper surface 1b of the ring gauge 1 is arranged so as to be immersed from the upper surface 3b of the protective ring 3. Therefore, even if the ring gauge 1 is inverted on the surface plate J in a reversely inverted state, The upper surface 1b and the reference gauge hole 2 of the ring gauge 1 do not touch the surface plate J, the damage of the upper surface 1b of the ring gauge 1 and the reference gauge hole 2 can be prevented, and the handleability can be improved.

In this case, the nominal dimension M as the inner diameter value D of the reference gauge hole 2, the error value N between the nominal dimension M and the actual dimension, and the direction and position of the measurement axis X of the actual dimension are provided on the upper surface 3b of the protective ring 3. Since the measurement index F is displayed, it is possible to easily recognize the imprint position of the actual dimension of the reference gauge hole 2 in the zero point adjustment of various measuring instruments. Improvements can be made.

  Further, in this case, as shown in FIG. 1, the protective ring 3 is made of an aluminum alloy, so that the weight can be reduced and the corrosion resistance can be improved. The improvement of the property and the decoration can be added.

  In this case, the ring gauge 1 is made of alloy tool steel, cemented carbide, or ceramics. The ring gauge 1 made of alloy tool steel is excellent in impact resistance and is made of cemented carbide. In the ring gauge 1, wear resistance and long life can be achieved, and since the coefficient of thermal expansion is small, there is little change due to temperature, and because of high hardness, the surface is not easily scratched and the gauge is easy to manage. The ring gauge 1 made of ceramics has higher wear resistance than steel and is resistant to aging, so there is no dimensional change, there is no worry about corrosion, etc. No plastic change due to scratches or dents, light weight and easy measurement and maintenance.

  In this case, as shown in FIG. 1 and FIG. 2, two annular anti-slip uneven portions 4 are formed on the outer peripheral surface of the protective ring 3 to prevent the protective ring 3 from slipping and falling when the protective ring 3 is gripped and lifted. When the outer peripheral surface of the protective ring 3 formed and gripped so that the outer peripheral surface of the protective ring 3 placed on the surface plate J is sandwiched between the thumb and the index finger is formed on the outer peripheral surface of the protective ring. Since a plurality of anti-slip grips 5 are formed to prevent horizontal slipping out in the horizontal direction perpendicular to the axial direction of the reference gauge hole 2 of the protective ring 3, when the protective ring 3 is gripped and lifted, the non-slip It is possible to prevent the protective ring 3 from slipping and falling by the concave and convex ridges 4, and further, by holding a plurality of anti-slip grips 5, the protective ring 3 can be horizontally slipped out due to the presence of the non-slip concave and convex ridges 4. Can be prevented.

  In this case, as shown in FIGS. 1 and 2, since the top 4a and the bottom 4b of the non-slip uneven portion 4 are formed on the arc surface, the anti-slip uneven portion 4 can be safely held by hand. In this case, the non-slip gripping portion 5 is formed by six concave arc surfaces 6 in which the anti-slip uneven portion 4 is notched in a concave arc shape. It is easy to hold, and when the protective ring 3 is gripped, horizontal slipping out due to the presence of the non-slip uneven portion 4 can be reliably prevented.

  The second embodiment shown in FIGS. 6 to 8 shows another structure. In this case, the anti-slip grip portion 5 of the first embodiment is formed on an arc surface composed of a top portion 5a and a bottom portion 5b. On the other hand, in this case, as shown in FIGS. 7 and 8, the non-slip uneven portion 4 is formed on eight flat surfaces 7 which are cut out in a planar shape.

  In the second embodiment, the same effect as the first embodiment can be obtained, and the non-slip uneven portion 4 is formed by eight flat surfaces 7 cut out in a planar shape. Therefore, the plurality of non-slip uneven strips 4 can be easily formed.

  The present invention is not limited to the above embodiment, but the material and size of the ring gauge 1, the size of the reference gauge hole 2, the material and size of the protective ring 3, and the bottom surface of the ring gauge 1. The amount of protrusion H from the bottom surface of the protective ring, the measurement index F, the nominal dimension M, the form of the error value N, and the like are designed as appropriate.

  As described above, the intended purpose can be sufficiently achieved.

J Surface plate D Inner diameter M Nominal dimension N Error value F Measurement index X Measurement axis 1 Ring gauge 1a Bottom surface 1b Top surface 2 Reference gauge hole 3 Protective ring 3a Bottom surface 3b Top surface

Claims (5)

  A protective ring is arranged on the outer periphery of a ring gauge having a reference gauge hole serving as a reference for various measuring instruments, and only the bottom surface of the ring gauge is in direct contact with the surface of a temperature-controlled surface plate. A master ring gauge, wherein the bottom surface of the ring gauge is arranged so as to protrude from the bottom surface of the protective ring. 2. The master ring gauge according to claim 1, wherein an upper surface of the ring gauge is arranged so as to be immersed from an upper surface of the protective ring. A nominal dimension as an inner diameter value of the reference gauge hole, an error value between the nominal dimension and the actual dimension, and a measurement index indicating the direction and position of the measurement axis of the actual dimension are displayed on the upper surface of the protective ring. The mastering gauge according to claim 1 or 2, characterized in that:   The master ring gauge according to claim 1, wherein the protective ring is made of an aluminum alloy.   The said ring gauge consists of alloy tool steel, a cemented carbide, or ceramics, The master ring gauge of any one of Claims 1-4 characterized by the above-mentioned.