JP2008145330A - Device for measuring thickness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for measuring thickness capable of preventing a measuring sensor from being damaged, even if it is operated by manual operation, and maintaining stably measurement accuracy. <P>SOLUTION: An ascending/descending part 3 is equipped with a contact body 31 that is to be brought into contact with a work 8, a reference rod 32 for determining a measurement reference point in an abutting state on a measurement reference plane 20, and a measuring device 33 for measuring displacement of the contact body 31. A reference plate 2 has a preparation plane 22, positioned on the furthermore inverted than the measurement reference plane 20, and a connection plane 21 for smoothly connecting the preparation plane 22 to the measurement reference plane 20, and can be slid in a direction orthogonal to the ascending/descending direction of the ascending/descending part 3. Movable positions of the reference plate 2 are set on a measurement position, where the reference rod 32 abuts against the measurement reference plane 20, and on a preparation position against which the preparation plane 22 abuts. The height of the preparation plane 22 is set at a height, at which the contact body 31 is out of contact with the work 8, when the ascending/descending part 3 is allowed to descend and the lower end 320 of the reference rod 32 is allowed to abut ther against. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a thickness measuring apparatus that can prevent a failure of the apparatus and continue high-precision measurement when measuring the thickness of a plate-like workpiece.

  For example, as a part (work) incorporated in an automatic transmission, there is a multi-plate plate in which a plurality of plates used for a wet multi-plate clutch / brake are overlapped. When assembling this part, it is necessary to accurately measure its thickness and to select a packing plate to be combined for adjusting the strokes of the clutch and brake pistons from a plurality of types according to the thickness. Therefore, in this case, it is indispensable to measure the thickness of the workpiece. In addition to the components of the automatic transmission, it may be necessary to measure the thickness of the components as necessary.

By the way, as a device for measuring the thickness of a workpiece, it is possible to use a non-contact type sensor (see, for example, Patent Document 1). It may be preferable to construct a device using a sensor and operate it manually by an operator.
In an apparatus for manual operation incorporating such a contact-type sensor, it is necessary to relatively move the sensor from a state where the sensor and the workpiece are separated to a position where they are in contact with each other. At this time, depending on the operator, the movement may be made too fast, and the sensor or the like may be damaged by an impact when contacting the workpiece. Moreover, even if the sensor is not damaged, the so-called zero point may change due to an impact and deteriorate the measurement accuracy.

JP 2006-308378 A

  The present invention has been made in view of such conventional problems, and it is intended to provide a thickness measuring apparatus capable of stably maintaining measurement accuracy without damaging the measurement sensor even when performed manually. It is what.

The present invention is a thickness measuring device for measuring the thickness of a plate-shaped workpiece,
A mounting table having a mounting surface for mounting the workpiece;
A reference plate having a measurement reference plane;
An elevating part provided so as to be able to move up and down facing the mounting table and to descend by its own weight;
The elevating unit includes a contact body that is brought into contact with the upper surface of the workpiece placed on the mounting table, a reference bar that is in contact with the measurement reference surface to determine a measurement reference point, and a displacement of the contact body. A measuring instrument for measuring,
The reference plate includes a preparation surface positioned above the measurement reference surface, a connection surface that smoothly connects the preparation surface and the measurement reference surface, and an ascending / descending direction of the elevating unit, It is provided to be slidable in the orthogonal direction,
The position at which the reference plate can be moved by sliding is such that when the elevating part descends, the measurement position where the lower end of the reference bar descends together with the elevating part and the measurement reference plane abuts, and the preparation surface abuts. Is set to the preparation position,

The height of the preparation surface is set to a height at which the contact body does not come into contact with the workpiece when the elevating part is lowered and the lower end of the reference bar is brought into contact.
In measuring the thickness of the workpiece placed on the mounting table, the elevating unit is lowered so that the lower end of the reference bar comes into contact with the preparation surface of the reference plate located at the preparation position. By sliding the reference plate and sliding the reference bar on the connection surface and guiding it to the measurement reference surface, the contact body and the upper surface of the work can be brought into contact with each other so that the thickness can be measured. The thickness measuring apparatus is characterized in that it is configured (claim 1).

  As described above, the thickness measuring device of the present invention has a mounting table, a reference plate, and an elevating unit, and is configured to measure the thickness of a workpiece placed on the mounting table by lowering the elevating unit. Yes. What should be noted here is that the measurement reference surface and the preparation surface having different heights are provided on the reference plate, and the reference plate is slid to be provided in the elevating part. It is possible to change the surface to be brought into contact with the reference rod. Furthermore, the height of the preparation surface is set to a height at which the contact body does not contact the workpiece when the elevating part is lowered and the lower end of the reference bar is brought into contact.

  In measuring the thickness of the workpiece placed on the mounting table, first, the elevating part is lowered so that the lower end of the reference bar comes into contact with the preparation surface of the reference plate located at the preparation position. Let At this time, the contact body provided in the elevating part does not yet contact the workpiece. Therefore, even if it is a case where the raising / lowering part is lowered vigorously, a contact body is not damaged.

Next, when the reference plate is slid, the reference rod slides relatively on the connection surface and is guided to the measurement reference surface while being lowered by its own weight. And thereby, the said contact body and the upper surface of the said workpiece | work contact, and thickness measurement is performed. At this time, the elevating part is lowered along with the relative sliding movement of the surface of the reference plate and the reference rod, so that a large impact is also caused when the contact body and the workpiece come into contact with each other. It does not occur and is very smooth and gentle. Therefore, the contact body is not damaged during the measurement.
Thus, according to the present invention, there is provided a thickness measuring apparatus capable of stably maintaining measurement accuracy without damaging a contact-type sensor composed of the contact body and the measuring instrument. can do.

  In this invention, it is preferable that the said workpiece | work is a ring shape and the said contact body consists of a ring-shaped contact plate (Claim 2). When the workpiece is ring-shaped, the measurement accuracy can be further improved by using the ring-shaped contact plate that can contact the entire circumference as the contact body.

  In addition, a plurality of measuring devices are provided, and each contact point of the measuring device is placed in contact with the contact plate at substantially equal intervals in the circumferential direction. It is preferable to have an output device that calculates and outputs the result (claim 3). In this case, the measurement accuracy can be further increased.

  Further, the mounting table has a ring-shaped or a plurality of arc-shaped upper mounting surfaces, and the reference plate positions the measurement reference surface and the preparation surface substantially at the center of the mounting table. It is preferable that the reference rod of the elevating unit is disposed at a substantially central portion of the contact plate (Claim 4). In this case, the workpiece can be stably set on the mounting table, and by positioning the reference bar at the center thereof, the stability of the lifting unit during measurement can be improved, and Measurement accuracy can be increased.

  The workpiece is preferably a multi-plate plate in which a plurality of ring-shaped plates incorporated in an automatic transmission are overlapped. As described above, when this multi-plate plate is incorporated into an automatic transmission, its thickness is accurately measured, and other parts to be combined according to the thickness must be selected from a plurality of types. It is very effective to use a thickness measuring device with high measurement accuracy.

(Example 1)
A thickness measuring apparatus according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 7 and 8, the thickness measuring apparatus 1 of this example measures the thickness of a workpiece 8 made of a multi-plate plate in which a plurality of ring-shaped plates 80 to 89 incorporated in an automatic transmission are stacked. It is a device. As shown in the figure, the work 8 is formed by superimposing a plurality of ring-shaped plates 80 to 89 having splines on the inner peripheral side or the outer peripheral side. The total thickness (in this example, the thickness of T shown in FIG. 8) needs to be accurately grasped.

  As shown in FIGS. 1 to 5, the thickness measuring apparatus 1 is opposed to the mounting table 11 having the mounting surface 110 on which the workpiece 8 is mounted, the reference plate 2 having the measurement reference surface 20, and the mounting table 11. And an elevating part 3 provided so as to be able to move up and down and to descend by its own weight.

The elevating unit 3 includes a contact body 31 that is brought into contact with the upper surface of the work 8 placed on the placing table 11, a reference bar 32 that is in contact with the measurement reference surface 20 to determine a measurement reference point, and a contact body 31. And a measuring device 33 for measuring the displacement.
The reference plate 2 has a preparation surface 22 positioned above the measurement reference surface 20 and a connection surface 21 that smoothly connects the preparation surface 22 and the measurement reference surface 20. It is provided to be slidable in a direction orthogonal to the ascending / descending direction.
The position at which the reference plate 2 can be moved by sliding is the measurement position at which the lower end 320 of the reference bar 32 and the measurement reference surface 20 abut when the elevating part 3 is lowered, and the preparation position at which the preparation surface 22 abuts. And is set.

The height of the preparation surface 22 is set to a height at which the contact body 31 does not contact the workpiece 8 when the elevating unit 3 is lowered and the lower end 320 of the reference bar 32 is brought into contact therewith.
And in measuring the thickness of the workpiece 8 placed on the placing table 11, the elevating unit 3 is lowered so that the lower end 320 of the reference bar 32 contacts the preparation surface 22 of the reference plate 2 located at the preparation position. Thereafter, the reference plate 2 is slid and the reference bar 32 is slid on the connection surface 22 and guided to the measurement reference surface 20, whereby the contact body 31 and the upper surface of the workpiece 8 are brought into contact with each other to perform the thickness measurement. It is configured to be able to.

Hereinafter, the configuration of the thickness measuring apparatus 1 will be described in more detail.
As shown in FIGS. 1 and 2, the thickness measuring device 1 includes the mounting table 11 and the reference plate 2 on the base plate 101, and a vertically extending elevating rail 103 provided on a column portion 102 erected from the base plate 101. The elevating part 3 is disposed so as to be slidable in the vertical direction via the.

  As shown in FIGS. 1, 2, and 4, the mounting table 11 includes two arc-shaped blocks 111 and 112, and the upper surface thereof serves as a mounting surface 110. The mounting table 11 has an inner peripheral shape that matches the outer shape of the lower half 890 of the thickest plate (sleeve) 89 located at the bottom of the workpiece 8 described above. It is configured so that it can be positioned at a predetermined position. Moreover, each block 111,112 of the mounting base 11 has a through-hole (not shown) for arrange | positioning the reference | standard plate 2 mentioned later on the side surface, respectively.

  As shown in FIGS. 1 and 4, the reference plate 2 has a band shape, and is arranged on the base plate 101 in a state where the through hole of the mounting table 11 is penetrated. As shown in FIG. 4, the reference plate 2 is guided by a pair of left and right guide plates 29, and is supported on the base plate 101 so as to be slidable in the directions of arrows C1 and C2. The reference plate 2 is provided with a third handle 28 erected vertically at one end thereof, and can be slid by an operator pushing and pulling it.

  On the upper surface of the reference plate 2, a measurement reference surface 20 which is a horizontal surface and a preparation surface 22 which is a horizontal surface located above the measurement reference surface 20 are formed as shown in FIG. In addition, a connection surface 21 that smoothly connects is formed between them. In this example, the installation surface 21 is an inclined surface, but may be replaced with a smooth curved surface or the like. When the reference plate 2 is slid to the movement limit (preparation position) in the arrow C1 direction, the preparation surface 22 is arranged at the center point O of the mounting table 11, and the reference plate 2 is moved to the movement limit in the arrow C2 direction. When sliding to (measurement position), the slide movement region is set so that the measurement reference plane 20 is arranged at the center point O of the mounting table 11.

As shown in FIGS. 1 to 3, the elevating unit 3 extends in a horizontal direction from a back plate 302 fixed to a slider unit 301 that is slidably engaged with the elevating rail 103 and a lower end portion of the back plate 302. The bottom plate 303 is formed.
As shown in FIG. 3, on the bottom plate surface 303, two opposing measurement through holes 305 sandwiching the center portion thereof are provided, and the measuring instrument 33 for measuring the displacement of the contact body 31 is provided. A digital dial gauge probe 331 (FIG. 1) is disposed in a state of passing through the measurement through hole 305.

Further, as shown in FIG. 3, the bottom plate surface 303 is provided with contact body supporting through holes 306 at three positions at equal intervals so as to surround the center portion thereof. A sleeve 307 is disposed in the through-hole 306, and a support rod 315 (FIGS. 1 and 2) having a flange portion at the upper end for supporting the contact body 31 is movably held therein. .
In addition, as shown in FIG. 5, the contact body 31 in this example includes a ring-shaped contact plate, is fixed to the three support rods 315, and is held in a state of being hung by the sleeve 307 on the bottom plate surface 303. Yes. And the front-end | tip of the said measuring element 331 contact | abuts on the upper surface of the contact body 31, and it is comprised so that the relative displacement of the contact body 31 with respect to the bottom face board 303 can be measured with the said digital dial gauge.

  As shown in FIGS. 1 and 2, the reference bar 32 is disposed downward from the bottom surface of the bottom plate surface 303. The reference bar 32 is disposed so as to coincide with the center point O (FIGS. 4 and 5) of the mounting table 11 described above, and the lower end 320 of the reference bar 32 is configured to be able to contact the upper surface of the reference plate 2. Has been. Further, as shown in FIG. 6, the length of the reference bar 32 is set so as to contact the upper surface of the work 8 on which the contact body 31 is set on the mounting table 11 when the lower end 320 contacts the measurement reference surface 20 of the reference plate 2. The contact body 31 is adjusted so as to be displaced relative to the bottom plate 303 by an amount effective for contact with the bottom plate 303. Further, as shown in FIG. 1, the height of the preparation surface 22 of the reference plate 2 described above is such that the workpiece on which the contact body 31 is set on the mounting table 11 when the lower end 320 of the reference bar 32 comes into contact therewith. 8 is adjusted to a height above the upper surface of 8 so as not to contact.

  Further, the contact body (contact plate) 31 has a ring shape as described above, and the center point thereof is matched with the center point O of the mounting table 11 in the ascending / descending direction. In other words, in this example, the center points of the reference bar 32, the contact body 31, and the mounting table 11 are arranged coaxially so that they all coincide with each other in the vertical direction, and the reference plate 2 further includes the measurement reference plane. 20 and the preparation surface 22 are arranged so that the center point O can be located.

As shown in FIGS. 1 to 3, a second handle 372 for supporting the bottom plate 303 is provided on the upper surface of the bottom plate 303. The back plate 302 is provided with a first handle 371 that penetrates the back plate 302 and can be moved forward and backward. As shown in FIG. 3, by inserting the tip of the first handle 371 into the engagement hole 108 of the fixing block 107 provided in the support column 102, the entire lifting unit 3 can be fixed so that it cannot be moved up and down. Further, since the first handle 371 is biased toward the fixed block 107 by a spring (not shown), the first handle 371 can be pulled out from the engagement hole 108 only when the operator moves backward against the biasing force. ing. Further, the lower end portion of the fixed block 107 has a tapered surface 109, and when the first handle 371 rises from below the fixed block 107, it automatically retracts along the tapered surface 109 (FIG. 1). It is supposed to be.
Further, as shown in FIG. 1, a chain 38 is connected to the bottom plate surface 303 from above and is connected to a load balance portion (not shown). And the raising / lowering part 3 is adjusted so that it may descend | fall by own weight in a free state.

  Further, an output line 332 (FIG. 1) for transmitting the output is extended from the measuring instrument (digital dial gauge) 33, and an output device (not shown) for calculating and outputting the measurement result is provided. It is connected.

Next, a procedure for measuring the thickness of the workpiece 8 using the thickness measuring apparatus 1 having the above configuration will be described.
First, as shown in FIGS. 1 and 4, the work 8 is placed on the mounting table 11 with the lifting / lowering unit 3 fixed to the upper end and the reference plate 2 fixed to the preparation position that is the sliding limit in the direction of the arrow C <b> 1. Set to.

  Next, the first handle 371 is retracted in the direction of the arrow A to release the engaged state with the fixed block 107, and the first handle 371 and the second handle 372 are operated in the direction of the arrow B to move the elevating unit 3 Descent. As shown in FIG. 1, the lower end 320 of the reference bar 32 of the elevating unit 3 is brought into contact with the preparation surface 22 of the reference plate 2. At this time, a slight gap is left between the contact body 31 and the upper surface of the work 8, and both remain in a non-contact state.

  Next, as shown in FIG. 6, after the first handle 371 and the second handle 372 are released to the free state, the third handle 28 is pulled to slide the reference plate 2 to the measurement position which is the sliding limit in the direction of the arrow C2. . As a result, the lower end 320 of the reference bar 32 moves onto the measurement reference surface 20 via the preparation surface 22 and the connection surface 21 on the upper surface of the reference plate 2. Then, while the lower end 320 of the reference bar 32 in the middle of the movement is in contact with the connection surface 21, the elevating unit 3 gradually descends due to its own weight, and the contact body 31 comes into contact with the workpiece 8 to finally measure. When the lower end 320 of the reference bar 32 moves on the reference surface 22, the contact body 31 is displaced relative to the bottom plate 303 of the elevating unit 3 by an amount necessary for measurement. The displacement of the contact body 31 is transmitted to the measuring element 331, and the measurement result of the measuring device 33 that measures the displacement is calculated and displayed on the output device. Thereby, the thickness measurement of the workpiece 8 is completed.

Thereafter, the second handle 372 is operated to raise the lifting / lowering unit 3, the first handle 371 and the fixed block 107 are engaged to fix the lifting / lowering unit 3 at the rising point, and the workpiece 8 is moved to the next measurement target. By repeating a series of operations of replacing the reference plate 2 and returning the reference plate 2 to the preparation position in the direction of the arrow C1, it is possible to continuously measure the thickness of the workpiece.
In order to improve the measurement accuracy, it is preferable to perform a so-called zero point adjustment of the measuring instrument 33 by periodically setting a master work having a desired thickness and performing the above thickness measurement.

  As described above, in the thickness measuring apparatus 1 of this example, the reference plate 2 is provided with the measurement reference surface 20 and the preparation surface 22 having different heights, and the reference plate 2 is slid to move the elevating unit. The surface to be brought into contact with the reference bar 32 provided in 3 can be changed. Further, the height of the preparation surface 22 is set to a height at which the contact body 31 does not come into contact with the workpiece 8 when the elevating unit 3 is lowered and the lower end 320 of the reference bar 32 is brought into contact therewith. Therefore, when measuring the thickness of the workpiece 8 placed on the placing table 11, the elevating unit 3 is lowered so that the lower end 320 of the reference bar 32 contacts the preparation surface 22 of the reference plate 2 located at the preparation position. At this time, the contact body 31 provided in the elevating unit 3 does not contact the workpiece 8 yet. Therefore, even if it is a case where the raising / lowering part 3 is lowered | hung down vigorously, the contact body 31 is not damaged.

When the reference plate 2 is slid, the reference bar 32 is guided to the measurement reference surface 20 while relatively sliding on the connection surface 21 and being lowered by its own weight. And thereby, the contact body 31 and the upper surface of the workpiece | work 8 contact, and thickness measurement is performed. At this time, the elevating part 3 is lowered along with the relative sliding movement of the surface of the reference plate 2 and the reference bar 32, so that a large impact is generated even when the contact body 31 and the workpiece 8 come into contact with each other. It does not occur and is very smooth and gentle. Therefore, the contact body 31 is not damaged even during measurement.
As described above, according to this example, the thickness measuring device 1 that can stably maintain the measurement accuracy without damaging the contact-type sensor including the contact body 31 and the measuring device 33 is provided. Can be provided.

Explanatory drawing which looked at the thickness measuring apparatus in Example 1 from the front. Explanatory drawing which looked at the thickness measuring apparatus in Example 1 from the side. Explanatory drawing which looked at the thickness measuring apparatus in Example 1 from the upper surface. FIG. 3 is an explanatory diagram illustrating a state where a workpiece is set on the mounting table in the first embodiment. Explanatory drawing which shows the shape of the contact in Example 1 (XX sectional view taken on the line XX in FIG. 2). Explanatory drawing which shows the state which is implementing the thickness measurement of the workpiece | work in Example 1. FIG. The top view of the workpiece | work in Example 1. FIG. Sectional drawing of the workpiece | work in Example 1 (YY arrow directional cross-sectional view of FIG. 7).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thickness measuring apparatus 2 Reference plate 20 Measurement reference surface 21 Connection surface 22 Preparation surface 3 Lifting part 31 Contact body 32 Reference rod 33 Measuring instrument

Claims (5)

A thickness measuring device for measuring the thickness of a plate-shaped workpiece,
A mounting table having a mounting surface for mounting the workpiece;
A reference plate having a measurement reference plane;
An elevating part provided so as to be able to move up and down facing the mounting table and to descend by its own weight;
The elevating unit includes a contact body that is brought into contact with the upper surface of the workpiece placed on the mounting table, a reference bar that is in contact with the measurement reference surface to determine a measurement reference point, and a displacement of the contact body. A measuring instrument for measuring,
The reference plate includes a preparation surface positioned above the measurement reference surface, a connection surface that smoothly connects the preparation surface and the measurement reference surface, and an ascending / descending direction of the elevating unit, It is provided to be slidable in the orthogonal direction,
The position at which the reference plate can be moved by sliding is such that when the elevating part descends, the measurement position where the lower end of the reference bar descends together with the elevating part and the measurement reference plane abuts, and the preparation surface abuts. Is set to the preparation position,
The height of the preparation surface is set to a height at which the contact body does not come into contact with the workpiece when the elevating part is lowered and the lower end of the reference bar is brought into contact.
In measuring the thickness of the workpiece placed on the mounting table, the elevating unit is lowered so that the lower end of the reference bar comes into contact with the preparation surface of the reference plate located at the preparation position. By sliding the reference plate and sliding the reference bar on the connection surface and guiding it to the measurement reference surface, the contact body and the upper surface of the work can be brought into contact with each other so that the thickness can be measured. A thickness measuring device characterized by being configured.   The thickness measuring apparatus according to claim 1, wherein the workpiece has a ring shape, and the contact body includes a ring-shaped contact plate.   In Claim 2, the said measuring device is provided with two or more, Each measuring element of the said measuring device is contact | abutted and arrange | positioned by the said contact plate at the substantially equal intervals in the circumferential direction, The said some measurement A thickness measuring device comprising an output device for calculating and outputting the measurement result of the vessel.   4. The mounting table according to claim 2 or 3, wherein the mounting table has a ring-shaped or a plurality of arc-shaped mounting surfaces, and the reference plate has the measurement reference surface and the preparation at a substantially central portion of the mounting table. A thickness measuring apparatus, wherein the reference bar of the elevating part is arranged at a substantially central part of the contact plate, and is arranged at a position where a surface can be located.   5. The thickness measuring device according to claim 1, wherein the workpiece is a multi-plate plate in which a plurality of ring-shaped plates incorporated in an automatic transmission are overlapped.

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