JPH0277603A - Thickness measuring apparatus - Google Patents

Abstract

PURPOSE:To easily measure the thickness of the relatively narrow part of an object to be measured by holding the object to be measured between measuring elements and excluding the histeresis of a lever member by a spring member. CONSTITUTION:Lever members 11, 12 are made easily drivable in an up-and- down direction centering around the central protruding parts of the fulcrum surfaces thereof and spring members 9, 10 act so as to eliminate the play or backlash of the driving of the members 11, 12. Further, measuring elements 27, 28 protruding in opposed relationship are respectively arranged and mounted to the inside surfaces of the outward ends 25, 26 of the members 11, 12 in a detachable manner so as to be opposed to each other in an up-and-down symmetric state and constitutes a thickness measuring part 29 grasping an object M to be measured from above and below to measure the thickness of the object M to be measured. Since the upper level member 11 receives larger pressing force as compared with the lower lever member 12, the upper measuring element 27 can apply higher measuring pressure to the object M to be measured as compared with the lower measuring element 28 and the thickness of the object M to be measured can be measured without requiring other special holder for holding the object M to be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to thickness measuring devices, and in particular to
The present invention relates to an apparatus that can automatically perform multi-point thickness measurements of a relatively narrow portion of an object to be measured, such as a W/W, with high accuracy.

BACKGROUND OF THE INVENTION Conventionally, multi-point thickness measurements of a relatively narrow portion of an object to be measured, such as a turbo T/W, have been carried out by a measurer manually using a measuring device such as a micrometer. The thickness of the point was measured.

Problems to be Solved by the Invention Conventionally, the same measurement had to be repeated several times at each measurement point for one object to be measured, which took time and effort, and the number of measurement points was relatively large. There is a greater possibility that the measurer will make an error in his/her judgment, which will cause a decrease in measurement accuracy, and when measuring the thickness of an extremely narrow area, it will be difficult for the measurer to manually measure the thickness. There were some inconveniences.

Means for Solving the Problems Therefore, the present invention has been made to eliminate the above-mentioned disadvantages of the conventional techniques, and is capable of high-accuracy multi-point measurement of the thickness of a relatively narrow portion of an object to be measured. It is an object of the present invention to provide a thickness measuring device which can be automatically measured, has a simple structure, can be manufactured at low cost, and is easy and convenient to handle.

According to the present invention, the thickness measuring device is provided with fulcrum parts at the tips of the upper and lower arm parts of the overall U-shaped main body block, and the lever member is connected to the fulcrum parts via spring members respectively. A thickness measuring section is formed at the outer end of the lever member, in which the gauge head is mounted pivotably and is arranged oppositely to contact the object to be measured to measure the thickness of the target object, and the gauge heads are in contact with each other. A spring member is provided that acts on the lever member such that the pressing force on the upper lever member increases the pressing force on the lower lever member while pressing the lever member in the direction, and the spring member cooperates with the lever member to A device is provided in each arm with a thickness measuring section for measuring the thickness of the object to be measured, and engages with the inner end of the lever member to pivot the lever member in a direction in which the thickness measuring section opens. It is characterized by having been provided.

Therefore, the thickness measuring part and the thickness measuring part are connected by the lever member, and the spring member provided at the fulcrum part removes the pivot play or backlash of the lever member to improve measurement accuracy, and the upper lever member The pressing force on the lower lever member is increased to ensure that the object to be measured is held between the probes, and the lever member is automatically pivoted by a device that pivots the lever member. The object to be measured can be easily moved in and out between the probes.

Further, according to the present invention, the thickness measuring device is formed as a unit, and a plurality of the thickness measuring devices are arranged around the object to be measured.

Therefore, the thicknesses of multiple locations on the object to be measured can be measured simultaneously.

Example Next, the present invention will be explained based on embodiments shown in the drawings.

1, 2 and 3 illustrate one preferred embodiment of a thickness measuring device according to the invention, in which a generally U-shaped upright vertically mounted A main body block 1 is provided, and the main body block 1 has an upright base 2 and a pair of arms 3 and 4 that are integrally formed and extend in a direction transverse to the base 2 and substantially parallel to each other. . That is, the arm 4 is identified with the base 2, and the arm 3 is connected to the arm 4 via an intermediate member 14, such as a connecting rod. Fulcrum parts 5 and 6 are provided at the tips of the arms 3 and 4, respectively, and the lower side of the fulcrum part 5 and the upper side of the fulcrum part 6 are provided on both left and right sides (the fulcrum parts 6 and 6 are provided on the lower side of the fulcrum part 5 and the upper side of the fulcrum part 6 so that the central part thereof is most protruded. 1) respectively forming tapered fulcrum surfaces 7 and 8 extending from the fulcrum surfaces 7 and 8 respectively. The fulcrum surfaces 7 and 8 have relatively thin plate-shaped spring members 9 and 10 partially embedded and fixed in their respective central raised parts, and the planes of the spring members 9 and 10 are as shown in FIG. The spring members 9 and 1o are arranged to extend vertically at right angles to the left-right direction, and the remaining portions of the spring members 9 and 1o protrude outward from the fulcrum surfaces 7 and 8.

Furthermore, the measuring device includes a pair of vertically symmetrical lever members 1 extending from the space between the arm parts 3 and 4 of the main body block 1 to the outside of the main body block 1 through the space between the fulcrum parts 5 and 6.
1 and 12, and the lever members 11 and 12 have fulcrum portions 13 and 14 disposed in their intermediate portions opposite to the fulcrum portions 5 and 6 of the arm portions 3 and 4 of the main body block 1, respectively.
are formed respectively. The fulcrum parts 13 and 14 form fulcrum faces 15 and 16, respectively, which have the same taper as the fulcrum faces 7 and 8 of the fulcrum parts 5 and 6 of the arm parts 3 and 4 of the main body block 1. The central raised part 16 embeds and fixes the outwardly protruding parts of the spring members 9 and 10, respectively, and is supported by contacting the central raised parts of the fulcrum surfaces 7 and 8 of the fulcrum parts 5 and 6. With this structure, the lever The members 11 and 12 can be easily pivoted up and down about the central ridges of their fulcrum surfaces 15 and 16, and the spring members 9 and 10 support the lever members 11 and 12.
It acts to eliminate pivot play or backlash. Further, the spring members 9 and 10 are constructed of spring members 9 and 1o having a thin rod shape instead of a plate shape, and these rod-shaped spring members 9 and 10 are connected to the respective fulcrum surfaces 7.8 and is, ie. can be located in the center of the central ridge of the

One end of a compression coil spring member 18 is attached to a portion of the upper lever member 11μ near the inner end 17, and the other end of the compression coil spring member 18 is attached to the lower arm portion 4 of the main body block 1.
The compression coil spring member 18 presses the lever member 11 in a counterclockwise direction as viewed in FIG. The range of rotation of the lever member 11 in the counterclockwise direction is determined by the lever member 11 coming into contact with the lower end of an adjustable screw stopper member 19 that is screwed onto the upper arm portion 4 of the main body block 1 and protrudes downward therefrom. limited.

The compression coil spring member 18 extends vertically through a hole 2o formed in the lower lever member 12, and is configured to operate in a w relationship with the lever member 12 to apply a spring force only to the lever member 11. has been done.

Similarly, the lower lever member 12 has its inner end 211F
The compression coil spring member 22 disposed between the upper arm portion 4 and the upper arm portion 4 presses the lever member clockwise around the central raised portion of the fulcrum surface 16 of the fulcrum portion 14 of the lever member. The range of clockwise rotation of the lever member 12 due to this pressing force is such that the lever member 12 is
by abutting the upper end of an adjustable screw stop member 23 which is screwed onto and projects upwardly therefrom. The compression coil spring member 22 extends vertically through a hole 24 formed in the upper lever member 11, and is configured to operate independently of the lever member 11 and apply a spring force only to the lever member 12.

Helical compression spring members 18 and 22 can be made of substantially the same material. However, the helical compression spring member 18 is located closer to the inner ends 17 and 21 of the respective lever members 11 and 12 than the helical compression spring member 22;
That is, they are arranged at a position farther from the respective fulcrums 5 and 6, and therefore, the pressing force that the upper lever member 11 receives from the compression coil spring member 18 is stronger than the pressing force that the lower lever member 12 receives from the compression coil spring member 22. It is configured to be larger than the pressing force received from the Alternatively, the compression fill spring member 18 may be made of a stronger spring material than the compression coil spring member 22 so that a stronger spring force is applied to the upper lever member 11 than the lower lever member 12.

Lever members 11 and 12 have their outer ends 25 and 26
Long, slender rod-shaped probes 2 protrude toward each other on the inner side surfaces of the
7 and 28 are respectively disposed vertically symmetrically facing each other and are removably attached by an appropriate method such as screwing, and the measurement 7-27 and 28 are made of a material such as an ultra-hard metal tip and their A thickness measuring section 29 is configured to measure the thickness of the object M by sandwiching the object M between the round tips from above and below. As mentioned above, the upper lever member 1
1 receives a larger pressing force than the lower lever member 12, the upper measuring point 27 can apply a higher measuring pressure to the object M than the lower measuring point 28. Therefore, the thickness of the object M can be measured without requiring any other special holder for holding the object M.

Furthermore, thickness measuring portions 3o are provided on the arm portions 4 and 5 of the main body block 1.
and 31 are provided vertically symmetrically. The thickness measurement section 30 has a pneumatic nozzle member 32 that constitutes the head of the pneumatic pressure measurement gauge, and this pneumatic nozzle member 32 is screwed onto the upper arm 4 so that its vertical position relative to the arm 4 is adjusted. The nozzle tip 33 of the pneumatic nozzle member 32 protrudes downward from the arm 4 and is arranged close to the upper surface 34 of the upper lever member 11. Further, a lock nut 35 is attached to the pneumatic nozzle member 32, and by tightening the lock nut 35, the vertical position of the pneumatic nozzle member 32 can be fixed at a desired position. With this configuration, the gap between the nozzle tip 33 of the pneumatic nozzle member 32 and the upper surface 34 of the lever member 11 is the same as that of the measuring elements 27 and 2.
8 varies depending on the thickness of the object to be measured M sandwiched between the two.

Similarly, the thickness measuring section 31 provided on the lower arm section 5 is connected to the pneumatic nozzle member 3 that constitutes the head of the pneumatic pressure measuring gauge.
6, this pneumatic nozzle member 36 is screwed onto the lower arm 5 and is arranged so that its vertical position can be finely adjusted with respect to the arm 5, and the nozzle tip of the pneumatic nozzle member 36 37 protrudes upward from the arm portion 5 and is disposed close to the lower surface 38 of the lower lever member 12. Furthermore, the pneumatic nozzle member 36 is equipped with a lock nut 39,
By tightening the lock nut 39, the vertical position of the pneumatic nozzle member 36 can be fixed at a desired position.

With this configuration, the gap between the nozzle tip 37 of the pneumatic nozzle member 36 and the lower surface 38 of the lever member 12 changes depending on the thickness of the object to be measured M sandwiched between the probes 27 and 28.

In this way, the thickness measurement units 3o and 31 can measure the gap between the nozzle tip 33 and the upper surface 34 of the lever member 11, which changes depending on the thickness of the object M, and the gap between the nozzle tip 37 and the lever member 12. A signal corresponding to the change in air pressure caused by a change in the gap between the lower surfaces 38 of the M is sent to an appropriate arithmetic circuit (not shown),
The thickness of the part can be automatically measured without error.

For the thickness measurement units 30 and 31, a generally known displacement detector such as an electric micro, dial gauge, or gap sensor may be used in place of the air pressure gauge, if desired.

Further, a pneumatic cylinder 40 is attached to the base 2 of the main body block 1, and the pneumatic cylinder 40 reciprocally supports plungers 41 and 42 that respectively project upward and downward. The upper plunger 41 has a bracket member 43 fixed to its outer end, and the bracket member 43 comes into contact with the inner end 17 of the upper lever member 11 when the plunger 41 is pulled back into the cylinder 4o. 27 in the clockwise direction, thereby moving the measurement constant 27 upward.

Similarly, the lower plunger 42 has a bracket member 44 secured to its outer end, which is attached to the inner end of the lower lever member 12 when the plunger 42 is pulled back into the cylinder 40. 21 and lever member 12
counterclockwise, thereby moving the probe 28 downward. In this way, the pneumatic cylinder 40 and the plungers 41 and 42 are operated when the object to be measured is moved in and out between the probes 27 and 28 to widen the gap between the probes 27 and 28. Can be done.

In this embodiment, the thickness measuring section @D, which is configured as a unit as described above, is arranged around the object to be measured M at approximately equal angular intervals, as shown in FIG. The device is configured to be able to automatically and accurately measure the thickness of three locations on the object M at the same time. It will be understood that, if necessary, other number of thickness measuring devices, for example, four thickness measuring devices as shown in FIG. 4, may be arranged around the object M to be measured.

FIGS. 5, 6, 7, 8, and 9 show examples in which measuring heads 27 and 28 having different deformed shapes are used to measure objects M of various shapes. The probes 27 and 28 shown in FIG. 5 have sharp tips so that they can simultaneously measure multiple points in a narrow area of the object M. The probes 27 and 28 shown in FIG. 6 have sharp tips and extend forward with a slight inclination, making it easy to measure the thickness of the narrow stepped portion of the object M. It is now possible to do so.

In addition, in the example shown in FIG. 7, the upper measuring tip 27 has a thin and sharp tip, so that it can enter into the narrow groove of the object to be measured M and easily measure the thickness of the groove bottom. ing. In the example shown in FIG. 8, both of the probes 27 and 28 have thin and pointed tips, so that they can measure the thickness between the bottoms of the grooves on both sides of the object M to be measured. Furthermore, in the example shown in FIG. 9, the probes 27 and 28 have hemispherical tips, so that they can accurately measure the thickness of the plate-shaped object M curved into a waveform. .

With the configuration of the present invention described in detail, the present invention enables measurement of an object to be measured in a somewhat free state. The thickness of the object to be measured can be measured with high accuracy by holding it at the same position and eliminating the hysteresis of pivoting of the lever member by the spring member provided at the fulcrum. This provides effects such as being able to easily measure the thickness and simultaneously and accurately measuring the thickness at multiple locations on the object to be measured.

[Brief explanation of the drawing]

FIG. 1 is a side view of essential parts of an embodiment of the present invention, FIG. 2 is an end view of the embodiment of FIG. 1, and FIG. 3 is a top view of the embodiment of FIG. 1.
4 is a schematic top view of main parts showing another arrangement configuration of the thickness measuring device of the embodiment shown in FIG. 1; FIG. 5, FIG. 6, FIG. 7, and FIG.
FIG. 9 and FIG. 9 are diagrams respectively illustrating other deformed shaped measuring elements for measuring objects of various shapes. In the figure, 1... Body block, 3.4... Arm part, 5.6... Fulcrum part, 9, 1o... Spring member, 11 .12...Lever member, 17.2
1...Reba. Inner end of one member, 18.22... Compression coil spring member, 25.26... Outer end of lever member,
27.28...Measuring head, 29...Thickness measuring section, 30.31...Thickness measuring section, 40...
...Pneumatic cylinder, 41.42...Plunger.

Claims (3)

[Claims] (1) A fulcrum part (5, 6) is provided at the tip of the upper and lower arm parts (3, 4) of the main body block (1) which is generally U-shaped, and a spring member (9) is provided at the fulcrum part. , 10), respectively, to which the lever members (11, 12) are pivotally attached, and the probes (27, 28) which contact the object to be measured (M) to measure the thickness of the object to be measured are facing each other. A thickness measuring portion (29) is formed at the outer end (25, 26) of the lever member, and the measuring element is pressed against the lever member in a direction in which the contact points contact each other, and the thickness measuring portion (29) is pushed toward the upper lever member (11). A spring member (18, 22) is provided that acts on the lever member such that the pressing force on the lower lever member (12) increases, and the spring member (18, 22) cooperates with the lever member (11, 12) to Thickness measuring parts (30, 31) for measuring the thickness of the object to be measured measured by the measuring head are provided on the arms (3, 4), respectively, and the inner ends (17, 21) for pivoting the lever members (11, 12) in the direction in which the thickness measuring portion (29) opens.
) A device for measuring the thickness of an object to be measured. (2) The thickness measuring device according to claim 1, characterized in that the thickness measuring device is formed as a unit, and a plurality of the thickness measuring devices are arranged around the object to be measured. Thickness measuring device. (3) U-shaped block (1) and spring members (9, 10
), each having a pair of arm portions (3, 4) at one end thereof, and a pair of arm portions (3, 4) provided on the block, and a pair of arm portions (3, 4) pivotally attached to each of the spring members. Lever members (11, 12), probes (27, 28) attached to the respective outer ends of the lever members so as to come into contact with the object to be measured, and near the inner end of one of the lever members. a first compression spring (18 or 22) installed between a portion of the lever member and one arm portion to press the one lever member; a portion near the inner end of the other lever member and the other arm portion; a second compression spring (22 or 18) that is installed between the arm and presses the other lever member; and a second compression spring (22 or 18) that is installed on the arm to detect the movement of the lever member and measure the thickness of the object to be measured. a device (40, 41, 42).