JP3142122U - Ring body and micrometer provided with the same - Google Patents

Abstract

Provided are a micrometer that prevents a measurement object from slipping and dropping even when a measurement object that makes contact with a contact surface between an anvil and a spindle at a point is sandwiched, and a ring body attached to the micrometer. .
When measuring a dimension of a measurement object to be clamped at a point by using a micrometer that measures the dimension by clamping the measurement object with an anvil and a spindle, an opening on one side is provided in each of the anvil and the spindle. Is fitted with a ring body having an annular shape which is smaller than the contact surface of the anvil and the spindle.
[Selection] Figure 3

Description

  The present invention relates to a micrometer that measures the size of a measurement object, and a ring body that is mounted when measuring the size of a measurement object that is held in contact with a contact surface between an anvil and a spindle at a point.

  A micrometer is used to measure the dimensions of the measurement object. The micrometer is used as a measuring instrument for measuring the thickness of a plate material, a measuring instrument for measuring a circular outer diameter, or an original instrument for calibrating a comparison gauge for measuring an inner diameter.

  The micrometer reads the dimensions based on the amount of movement of the spindle with reference to the contact surface of the anvil so that the measurement object is sandwiched between the anvil and the spindle.

  That is, in the dimension measurement work in the micrometer, the operator needs to simultaneously hold the object to be measured, move the spindle, and visually check the displayed dimensions. Must be distributed. In addition, the abutment surface between the anvil and the spindle is polished, and it is easy to slip because of its small area.

  Here, the both ends of the gauge body portion of the comparative gauge for measuring the inner diameter are often tapered. In order to calibrate the inner diameter measurement comparative gauge, the anvil and the spindle must be held between the gauge body portions with both ends tapered. Then, the inner diameter measuring comparison gauge is supported by the micrometer with a point, so that it is easier to slide down. Therefore, when calibrating the inner diameter measurement comparison gauge, more care must be taken to hold the inner diameter measurement comparison gauge.

  However, when calibrating the inner diameter measurement comparison gauge, the dimensions displayed by the micrometer and the dimensions displayed by the inner diameter measurement comparison gauge are measured with the gauge body portion of the inner diameter measurement comparison gauge held between the anvil and the spindle. Must be compared. Therefore, it tends to concentrate on the visual inspection of the dimensions, and tends to be distracted with respect to holding the inner diameter measuring comparison gauge.

  The present invention has been made in view of the above-described problems, and even if a measurement object that makes contact with the contact surface of the anvil and spindle is pinched, the measurement object slides and falls off. It is in providing the micrometer which reduces a burden of an operator by preventing this, and the ring body with which this is mounted | worn.

  In order to solve the above-mentioned problem, the device according to claim 1 is a micrometer for measuring a dimension of a measurement object sandwiched between an abutment surface of an anvil and an abutment surface of a spindle that can approach or leave the anvil. A ring body that is used together with a meter and is fitted into each of the anvil and the spindle when a gauge body having contact points at both ends is sandwiched as the measurement object and the gauge body is calibrated, The opening opposite to the opening inserted into the spindle has a ring shape narrower than the contact surface.

  In order to solve the above-mentioned problem, the device according to claim 2 has an anvil having a contact surface with a measurement object at one end and a contact surface with the measurement object on a side facing the anvil. The size of the measurement object sandwiched between the anvil and the spindle is displayed based on the spindle that can approach or separate from the anvil and the amount of movement of the spindle with respect to the contact surface of the anvil. And a gauge body having a contact point at both ends as the measurement object and when the gauge body is calibrated, the gauge body is fitted into each of the anvil and the spindle, and is attached to the anvil and the spindle. An opening opposite to the opening to be inserted is provided with a ring body having a ring shape narrower than the contact surface.

  Depending on the present invention, even if the measurement object is easy to slide down because it abuts against the contact surface of the anvil and the spindle with a point, the measurement object is prevented from slipping by being guided by the ring body. Therefore, it is not necessary to try to maintain the state of the measurement object, and the dimensions of the measurement object can be easily confirmed.

  Hereinafter, an embodiment of a micrometer of the present invention and a ring body attached to the micrometer will be described in detail with reference to FIGS. First, the micrometer 10 will be described with reference to FIG.

  The micrometer 10 mainly includes a main body 12, a frame 14, an anvil 16, a spindle 18, a sleeve 20, a thimble 22, a thimble knob 24, a clamp 26, and a dimension display unit 28. ing.

  This micrometer 10 is used as a measuring instrument for measuring the thickness of a plate material, a measuring instrument for measuring a round outer diameter, or an original instrument for calibrating a comparison gauge for measuring an inner diameter. The measurement object is sandwiched between the anvil 16 and the spindle 18, and the dimension of the measurement object can be read from the movement amount of the spindle 18. In other words, the anvil 16 is a fixed-side table that holds the measurement object. The spindle 18 is a movable shaft body that holds the measurement object.

  In the micrometer 10, the frame 14 is formed from a plate member having a substantially C shape, and one end is supported by the main body 12.

  The anvil 16 is formed of a bar member. The anvil 16 is formed at the other end opposite to the one end supported by the main body 12 of the frame 14. The anvil 16 protrudes from the inner bay side of the frame 14 toward the main body 12. An end surface of the anvil 16 is a first contact surface 16a that contacts the measurement object.

  The spindle 18 is formed of a cylindrical bar member. The spindle 18 has a common axis with the anvil 16 and protrudes from the main body 12 side, and faces the anvil 16. The micrometer 10 measures the dimension of the object to be measured between the anvil 16 and the spindle 18. At this time, the end surface of the spindle 18 is in contact with the object to be measured. It has become.

  The spindle 18 is housed inside the main body 12 and the sleeve 20 except for the protruding portion. A screw thread is formed in the accommodated portion, and is engaged with a screw thread formed on the inner wall surface of the sleeve 20.

  The sleeve 20 is a cylindrical tube, and protrudes from the main body 12 to the side opposite to the spindle 18. The sleeve 20 accommodates a part of the spindle 18 therein. A thimble 22 is disposed on the protruding side of the sleeve 20 so as to be extrapolated.

  The thimble 22 is formed of a cylindrical sealed tube body in which one opening is sealed and the other opening is narrowed. The inner diameter of the throttled opening of the thimble 22 is slightly larger than the outer diameter of the sleeve 20, and the thimble 22 extrapolates the throttled opening to the sleeve 20. The thimble 22 is joined to the spindle 18 without interfering with the sleeve 20.

  A thimble knob 24 is connected to the sealing portion of the thimble 22. The thimble knob 24 is a rotary knob when the thimble 22 and the spindle 18 are moved closer to or away from the anvil 16.

  In the micrometer 10, the spindle 18 is moved in the axial direction by the thread formed on the spindle 18, the thread formed on the sleeve 20, the thimble 22, and the thimble knob 24, so that the first contact surface of the anvil 16 is moved. Approach or leave 16a.

  That is, when the thimble knob 24 is rotated in one direction, the thimble 22 approaches the anvil 16 so as to swallow the sleeve 20 through the opening while rotating in the same direction. Then, the spindle 18 also approaches the anvil 16 while rotating in the same direction as the thimble knob 24 and the thimble 22.

  When the thimble knob 24 is rotated in the opposite direction, the thimble 22 is also rotated in the same direction, and is moved away from the anvil 16 so as to discharge the sleeve 20 from the opening. Then, the spindle 18 also moves away from the anvil 16 while rotating in the same direction as the thimble knob 24 and the thimble 22.

  A ratchet mechanism (not shown) is formed inside the thimble knob 24, and the thimble knob 24 and the spindle 18 are pressed against the measurement object while the measurement object is held between the anvil 16 and the spindle 18. When rotated in the direction of rotation, the spindle 18 and the thimble 22 are idled.

  The clamp 26 has a knob portion 34 made of a disk-shaped screw material, and is disposed in front of the main body portion 12. When the knob portion 34 of the clamp 26 is rotated and screwed into the main body portion 12, the movements of the spindle 18, thimble 22 and thimble knob 24 can be locked.

  The main body 12 houses a measurement mechanism (not shown) that measures the dimensions of the measurement object. The measuring mechanism is, for example, an encoder (not shown), and detects the amount of movement of the spindle 18. The amount of movement of the spindle 18 is based on the first contact surface 16a of the anvil 16.

  The dimension display unit 28 is configured by a scale or the like carved on the surface of the liquid crystal display panel, the electric display panel, or the sleeve 20, and displays the dimension of the measurement object sandwiched between the anvil 16 and the spindle 18. This dimension is proportional to the amount of movement of the spindle 18 detected by the measurement mechanism. When digital display is performed, the anvil 16 and the spindle 18 are brought into contact with each other to reset the movement amount.

  When the micrometer 10 is used as a master for calibrating the inner diameter measurement comparison gauge, the inner diameter measurement comparison gauge is prevented from slipping off the anvil 16 and the spindle 18. A ring body 30 serving as a guide for retaining is attached.

  2A and 2B are views showing the ring body 30. FIG. 2A is a side sectional view, FIG. 2B is a front view, and FIG. 2C is a side view.

  As shown in FIG. 2, the ring body 30 has a ring shape having a predetermined thickness. The ring bodies 30 are respectively attached to the anvil 16 and the spindle 18. In the ring body 30, the opening on one surface side is an insertion port 31, and the opening on the opposite surface is a guide hole 33. The ring body 30 is externally inserted into the anvil 16 and the spindle 18 from the insertion port 31.

  The opening diameter of the insertion port 31 is the same as or slightly larger than the outer diameter of the first contact surface 16a of the anvil 16 and the second contact surface 18a of the spindle 18.

  The guide hole 33 protrudes from an enclosure 32 formed by bending the wall forming the ring body 30 inward. The enclosure 32 has a predetermined thickness in the axial direction of the ring body 30. The opening diameter of the guide hole 33 is narrower than the first contact surface 16 a of the anvil 16 and the second contact surface 18 a of the spindle 18 because the enclosure 32 protrudes toward the center of the guide hole 33.

  For example, if the outer diameters of the first contact surface 16a of the anvil 16 and the second contact surface 18a of the spindle 18 are 6.3 mm, the insertion port 31 is also about 6.3 mm or slightly larger. On the other hand, the enclosure 32 is bent 0.65 mm toward the center of the guide hole 33, and the inner diameter of the guide hole 33 is 5 mm. For example, the thickness of the enclosure 32 is about 0.5 mm.

  3 to 5 are views for explaining how the micrometer 10 to which the ring body 30 is attached is used. FIG. 3 is a cross-sectional view along the axial direction of the anvil 16 and the spindle 18. FIG. 4 is an overall view showing how the micrometer 10 is used. FIG. 5 is an enlarged perspective view of one ring body 30 portion.

  In the inner diameter measurement comparison gauge 40, the tip 42 of the gauge 41 is tapered in order to measure the inner diameter of the measurement object. Therefore, when the gauge 41 of the inner diameter measurement comparison gauge 40 is sandwiched between the anvil 16 and the spindle 18, the first contact surface 16 a or the second contact surface 18 a and the tip 42 of the gauge 41 come into contact at a point. The ring body 30 is attached to the anvil 16 and the spindle 18 when measuring the dimension of the object to be measured which is tapered at such a pinched portion and abuts at a point.

  Specifically, the ring body 30 is extrapolated from the insertion port 31 so as to wrap around the first contact surface 16 a of the anvil 16. Further, the ring body 30 is externally inserted from the insertion port 31 so as to wrap around the second contact surface 18a of the spindle.

  Since the guide hole 33 of the ring body 30 is narrower than the diameter of the anvil 16 and the spindle 18, when the ring body 30 is extrapolated from the insertion port 31, the peripheral edge of the first contact surface 16 a of the anvil 16 and the first of the spindle 18. 2 The peripheral edge of the contact surface 18 a contacts the enclosure 32. Then, the surfaces of the first contact surface 16a and the second contact surface 18a remain exposed from the guide hole 33, but an enclosure 32 having a predetermined thickness is erected on the periphery thereof.

  When the object to be measured is held in this state, when both the tips 42 of the gauge 41 are brought into contact with the first contact surface 16a of the anvil 16 and the second contact surface 18a of the spindle 18, respectively, the tip 42 of the gauge 41 is used. Enters the guide hole 33 surrounded by the enclosure 32. Then, even if the tip 42 of the measurement object is about to slide down from the first contact surface 16a or the second contact surface 18a, the tip 42 is guided by the enclosure 32 of the ring body 30 and remains within the range where the guide hole 33 expands. In other words, the object to be measured is maintained in a sandwiched state without sliding down.

  As described above, when measuring the size of a measurement object that is likely to slide down due to contact at a point, the opening opposite to the opening into which the anvil 16 or the spindle 18 is inserted is the first contact surface 16a or the second contact. By attaching the ring body 30 having a shape narrower than the diameter of the contact surface 18a, it is possible to prevent the measurement object from slipping, and therefore it is not necessary to try to maintain the state of the measurement object, and the measurement object can be easily obtained. Can be confirmed.

  In order to increase the movable range of the spindle 18, it is preferable to design the ring body 30 as thin as possible. Further, the protruding length of the enclosure 32 is a range surrounding the first contact surface 16a and the second contact surface 18a so that the first contact surface 16a and the second contact surface 18a can be used as widely as possible. It is preferable to make it as small as possible. Further, by chamfering the outer periphery of the surface of the ring body 30 on the guide hole 33 side, it becomes easy to attach the comparative gauge for measuring the inner diameter.

  The ring body 30 may be colored or marked to identify the surface on the guide hole 33 side and the surface on the insertion port 31 side. When the ring body 30 is mounted, it is excellent in workability without wondering which one is the insertion port 31.

It is an external view of a micrometer. It is a figure which shows a ring body. It is sectional drawing along the axial direction of the anvil and spindle in the usage condition of a micrometer. It is a general view which shows the usage condition of a micrometer. It is an expansion perspective view of one ring body part in the mode of use of a micrometer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Micrometer 12 Main-body part 14 Frame 16 Anvil 16a 1st contact surface 18 Spindle 18a 2nd contact surface 20 Sleeve 22 Thimble 24 Thimble knob 26 Clamp 28 Dimension display part 30 Ring body 31 Insertion port 32 Surrounding 33 Guide hole

Claims (2)

A gauge body having a contact point at both ends is used together with a micrometer for measuring the size of a measurement object sandwiched between a contact surface of an anvil and a contact surface of a spindle that can approach or leave the anvil. A ring body to be fitted into each of the anvil and the spindle when the gauge body is calibrated by holding as an object,
An opening opposite to the opening inserted into the anvil or the spindle has an annular shape that is narrower than the contact surface;
A ring body characterized by An anvil having a contact surface with an object to be measured at one end;
A spindle having a contact surface with the measurement object on the side facing the anvil, and capable of approaching or separating from the anvil;
Based on the amount of movement of the spindle with respect to the contact surface of the anvil, a dimension display unit that displays the dimension of the measurement object sandwiched between the anvil and the spindle;
When a gauge body having contact points at both ends is sandwiched as the measurement object and the gauge body is calibrated, the openings inserted into the anvil and the spindle and inserted into the anvil or the spindle are A ring body having an annular shape in which the opposite opening is narrower than the contact surface;
Providing
A micrometer characterized by

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