JP3754609B2 - Hemming probe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a probe for measuring a hemming portion, which is moved in the longitudinal direction while contacting the ridgeline in order to measure the shape of the bent portion ridgeline of the hemming portion of an object to be measured using a three-dimensional coordinate measuring apparatus. .
[0002]
[Prior art]
A three-dimensional coordinate measuring apparatus is known as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-261745.
[0003]
[Problems to be solved by the invention]
Conventionally, when measuring the shape of the bent portion ridge line of the hemming portion of the object to be measured using a three-dimensional coordinate measuring apparatus, the bent portion ridge line is traced with a needle-like probe. However, capturing the ridgeline of the bent portion with a needle-like probe generally relies on intuition and requires a high degree of skill.
[0004]
The present invention has been made in view of such circumstances, and the shape of the bent portion ridge line of the hemming portion of the object to be measured can be easily measured with high accuracy without requiring special skill. It is an object of the present invention to provide a probe for measuring the hemming part.
[0005]
[Apparatus for solving the problems]
In order to achieve the above object, the present invention is a hemming portion measuring probe provided at the tip of an articulated arm of a three-dimensional coordinate measuring apparatus, which is intended to measure the shape of a bent portion ridge line of a hemming portion of an object to be measured. , one is contacted with該稜lineゝin that so as to move in its longitudinal direction, across the bent portion of the hemming portion, a pair of scissors arms facing the side surfaces, the corresponding provided on each scissors arm A rolling member that can roll on the side surface of the hemming portion, and the hemming supported by the sandwiched arms to accurately detect each position of the ridge line of the bent portion of the hemming portion by the three-dimensional coordinate measuring device. The first feature is that it is configured with a roller-type detection unit that can roll on the ridge line of the bent portion.
[0006]
According to the first feature, the probe can be held in a correct posture in which the detection unit comes into contact with the bent portion ridge line of the hemming portion by sandwiching both the sandwiching arms with respect to the hemming portion. Therefore, if the probe is moved along the bending part ridge line of the hemming part, the detection part rolls on the bending part ridge line, and each position of the bending part ridge line corresponding to the detection part is three-dimensionally coordinated. The shape can be measured by accurately detecting with a measuring device . Moreover, the probe can be smoothly moved in a correct posture by rolling on the side surface of the hemming portion of the roller of the rolling member of both the sandwiching arms and rolling on the ridge line of the bent portion of the detection unit.
[0007]
In addition to the above-described features, the present invention makes it possible to adjust the distance between the pair of sandwiching arms, and to support the detection unit rotatably and slidably on a support shaft disposed between the sandwiching arms. A second feature is that a pair of balance springs for biasing the detecting portion to the center position between the two sandwiching arms is interposed between the sandwiching arms.
[0008]
According to the second feature, it is possible to cope with the measurement of various hemming portions having different thicknesses by adjusting the distance between both the sandwiching arms. In addition, the detecting portion can always be automatically held at the center position between the both sandwiching arms by the balance action of the balance spring, and the measurement accuracy of the bent portion ridge line can be improved.
[0009]
Furthermore, the present invention is a probe for measuring a hemming portion provided at the tip of an articulated arm of a three-dimensional coordinate measuring apparatus, and is in contact with the ridgeline in order to measure the shape of a ridgeline of a bent portion of a hemming portion of an object to be measured.ゝin that so as to move in its longitudinal direction, a shank, branches from the tip of the shank bifurcated, across the bent portion of the hemming portion, a pair of scissors arms can slide on both sides thereof The shank protrudes between the sandwiched arms so as to accurately detect each position of the bent portion ridge line of the hemming portion by the three-dimensional coordinate measuring device and on the bent portion ridge line of the hemming portion. A third feature is that a detection protrusion capable of sliding is formed.
[0010]
According to the third feature, the hemming portion is sandwiched by both the sandwiching arms, the detection projection is brought into contact with the bent portion ridge line of the hemming portion, and the probe is slid along the bent portion ridge line. The respective positions of the bent portion ridge lines corresponding to the detection protrusions can be accurately detected by the three-dimensional coordinate measuring device , and the shape thereof can be measured. In addition, the structure of the probe is extremely simple and can be provided at a low cost.
[0011]
Furthermore, in addition to the third feature, the present invention has a fourth feature in which a cross section of the detection protrusion is formed in a semi-cylindrical shape.
[0012]
According to the fourth feature, it is possible to accurately measure the hemming portion, particularly the convex corner portion.
[0013]
Furthermore, in addition to the third feature of the present invention, a fifth feature is that a cross section of the detection projection is formed in a triangular prism shape.
[0014]
According to the fifth feature, it is possible to accurately measure the hemming portion, particularly the concave corner portion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.
[0016]
1 to 5 show a first embodiment of the present invention. FIG. 1 is a side view of a three-dimensional coordinate measuring apparatus equipped with a probe for measuring a hemming portion of the present invention, and FIG. 2 is an enlarged side view of the probe. 3 is a sectional view taken along the line 3-3 in FIG. 2, FIG. 4 is a sectional view taken along line 4-4 in FIG. 2, and FIG. 5 is a side view corresponding to FIG. It is.
[0017]
First, in FIG. 1, a three-dimensional coordinate measuring apparatus 10 includes a base 9 installed on a floor, a support 11 standing on the base 9, and a multi-joint (illustrated example) supported by the support 11. 3 joints) arm 12, hemming portion measuring probe 13 connected to the tip of this multi-joint arm 12 so as to be able to swing, and the position of detector 18 described later in this probe 13 are calculated and the result is calculated. The computer 14 displays on a display or prints out.
[0018]
As shown in FIGS. 2 to 4, the hemming portion measuring probe 13 includes a base portion 15 that is swingably connected to the tip of the articulated arm 12, and a pair of sandwiching arms 16 provided on the base portion 15. 17 and a roller-type detection unit 18 supported between the sandwiching arms 16 and 17. One pinching arm 16 is a fixed pinching arm fixed to one end of the base portion 15, and the other pinching arm 17 is slidably engaged with and fixed to a rail 19 formed on the base portion 15. It is a movable pinch arm that can move forward and backward with respect to the pinch arm 16. A base end of a support bolt 20 (corresponding to the support shaft of the present invention) extending in parallel with the rail 19 and penetrating the movable clamp arm 17 is fixed to the fixed clip arm 16, and a wing nut 21 is attached to the tip of the support bolt 20. Are screwed together.
[0019]
A roller-type detector 18 is supported on the support bolt 20 so as to be rotatable and slidable between the sandwiching arms 16 and 17, and the detector 18 is attached to a central position between the sandwiching arms 16 and 17. A pair of balancing springs 22 and 23 are mounted.
[0020]
Both the sandwiching arms 16 and 17 can be opened at a sufficient interval between which the object to be measured, for example, the hemming portion 26 of the automobile body D can be inserted. It can be adjusted according to the condition.
[0021]
Each of the sandwiching arms 16, 17 has a plurality of rollers 27, 27; 28, 28 (corresponding to the rolling members of the present invention) in contact with the hemming portion 26 inserted between them (two addresses in the illustrated example). It is attached. At this time, the rollers 27 and 28 are arranged so that the axis thereof is orthogonal to a plane passing through the axis of the support bolt 20.
[0022]
Next, the operation of this embodiment will be described.
[0023]
In using the hemming section measuring probe 13, first, the detection section 18 reads any three points on the automobile body B, which is the object to be measured, as reference points. Next, as shown in FIG. 5, the wing nut 21 is loosened to sufficiently widen the space between the two sandwiching arms 16 and 17, and the hemming portion 26 of the automobile body D is inserted between them. Next, the wing nut 21 is tightened, and the distance between both the sandwiching arms 16 and 17 is adjusted so that the rollers 27 and 28 come into contact with the opposing surfaces of the hemming portion 26, and at the same time, the outer peripheral surface of the detection portion 18 is adjusted to the hemming portion 26. Are brought into contact with the bent portion 26a. Then, the sandwiching arms 16, 17 hold the hemming portion 26 correctly via the rollers 27, 28, thereby holding the detection unit 18 in a correct posture in which the outer peripheral surface is in contact with the bent portion ridge line L of the hemming portion 26. Will do.
[0024]
Therefore, if the operator grasps the base portion of the probe 13 and moves the probe 13 along the bending portion ridge line L of the hemming portion 26, the detection unit 18 rolls on the bending portion ridge line L, Each position of the bent portion ridge line L can be accurately detected based on the three reference points, and its shape (that is, a straight line shape, a wave shape, etc.) can be measured. Moreover, the movement of the probe 13 is smooth due to the rolling of the rollers 27 and 28 of the sandwiching arms 16 and 17 on the side surface of the hemming portion 26 and the rolling of the detection portion 18 on the ridge line L of the bent portion. The correct posture of the detection unit 18 can be easily maintained.
[0025]
In this way, the shape of the bent portion ridge line L can be increased by a simple operation of moving the probe 13 along the bent portion ridge line L of the hemming portion 26 in a state in which both the sandwiching arms 16 and 17 are held by the hemming portion 26. Since it can be measured with accuracy, any person can operate it without any special skill.
[0026]
Further, since the movable holding arm 17 can be advanced and retracted with respect to the fixed holding arm 16 by adjusting the screwing of the wing nut 21, the distance between the holding arms 16 and 17 can be freely adjusted. It can be used for measurement and has a wide range of uses. In addition, at that time, the detecting unit 18 is always automatically set at the center position between the both sandwiching arms 16 and 17 by the balance action of the coil springs 22 and 23 contracted between the detecting unit 18 and the both sandwiching arms 16 and 17. And can contribute to the improvement of the measurement accuracy of the bent portion ridge line L.
[0027]
Next, a second embodiment of the present invention shown in FIGS. 6 to 8 will be described. 6 is a perspective view of a three-dimensional coordinate measuring apparatus equipped with a hemming portion measuring probe according to a second embodiment of the present invention, FIG. 7 is an enlarged sectional view taken along line 7-7 of FIG. 6, and FIG. FIG.
[0028]
In FIG. 6, the three-dimensional coordinate measuring apparatus 110 includes a base 109 installed on the floor, and an articulated arm 112 having eight joints J1 to J8 attached to the base 109. As the most advanced arm of the articulated arm 112, a hemming portion measuring probe 113 is provided.
[0029]
As shown in FIGS. 7 and 8, the probe 113 includes a shank 30 and a pair of sandwiching arms 31 and 31 ′ that are bifurcated from the tip of the shank 30 and face each other. Conical or hemispherical guide projections 32 and 32 'are formed on the opposing surfaces of the sandwiching arms 31 and 31', and an object to be measured, for example, an automobile door D, is interposed between the guide projections 32 and 32 '. The hemming portion 26 is set to an interval at which the hemming portion 26 can be slidably inserted. The shank 30 is integrally formed with a semi-cylindrical detection projection 33 projecting between the sandwiching arms 31 and 31 ′. The detection projection 33 can slide on the ridge line L of the hemming portion 26. It is like that.
[0030]
Thus, when the probe 13 is used, in this case as well, any three points of the door D are read by the detection projection 33 of the shank 30 of the probe 113 as a reference point, and then the door D is sandwiched between the sandwiching arms 31 and 31 '. The columnar detection projection 33 is brought into contact with the bent portion of the hemming portion 26. When the operator grips the shank 30 of the probe 113 and moves the probe 113 along the bent portion ridge line L of the hemming portion 26, the detection projection 33 slides on the bent portion ridge line L. Based on the three reference points, each position of the bent portion ridge line L can be accurately detected and its shape can be measured. In particular, the cylindrical detection protrusion 33 is effective in measuring the convex corner of the hemming portion 26 as shown in FIG. In addition, since the three points of the guide projections 32, 32 ′ and the detection projection 33 of the both sandwiching arms 31, 31 ′ are in contact with the hemming portion 26, the correct posture of the probe 113 can be secured, which can contribute to the improvement of measurement accuracy.
[0031]
Next, a probe according to a third embodiment of the present invention shown in FIG. 9 will be described.
[0032]
The probe 213 of the third embodiment corresponds to the probe 113 of the second embodiment in which the semi-cylindrical detection protrusion 33 is replaced with a triangular prism-shaped detection protrusion 34, and the other configuration is the second embodiment. Therefore, the same reference numerals are assigned to portions corresponding to those in the second embodiment, and detailed description thereof is omitted.
[0033]
The probe 213 having such a triangular prism-shaped detection projection 133 is effective for measuring the concave corner of the hemming portion 26 of the automobile tailgate T, for example.
[0034]
The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, in the first embodiment, a plurality of balls can be attached to each of the sandwiching arms 16 and 17 in place of the plurality of rollers 27 and 28.
[0035]
【The invention's effect】
As described above, according to the first feature of the present invention, there is provided a probe for measuring the hemming portion provided at the tip of the articulated arm of the three-dimensional coordinate measuring apparatus, and the shape of the bent portion ridge line of the hemming portion of the measurement object to measure, in that so as to move to the contacted oneゝits longitudinal direction該稜line, across the bent portion of the hemming portion, a pair of scissors arms facing the side surfaces, provided on each scissors arm And a rolling member that can roll on the side surface of the corresponding hemming portion, and the three-dimensional coordinate measuring device is supported between the sandwiching arms in order to accurately detect each position of the bent portion ridge line of the hemming portion. The roller-type detection unit that can roll on the bending portion ridge line of the hemming portion, the probe is brought into contact with the bending portion ridge line of the hemming portion by sandwiching both the clamping arms with respect to the hemming portion. correct Can be held in the energized, thus the simple operation of moving along the probe to the bent portion ridgeline of the hemming unit, precisely by the position three-dimensional coordinate measuring device of the bent portion ridgeline corresponding to the detection unit It can be detected and its shape measured, and its operation does not require special skill. In addition, the probe probe can be smoothly moved in the correct posture by rolling on the side surface of the hemming portion of the roller of the rolling member of both the sandwiching arms and rolling on the ridge line of the bent portion of the rotor type detection unit.
[0036]
According to the second feature of the present invention, the distance between the pair of sandwiching arms can be adjusted, and the probe can be rotatably and slidably supported on a support shaft disposed between the sandwiching arms. Since a pair of balance springs that urge the probe to the center position between the two sandwiching arms are interposed between the sandwiching arms, it is possible to measure various hemming portions having different thicknesses by adjusting the distance between the sandwiching arms. It can be used and its usage range is wide. In addition, the balance action of the balance spring can automatically hold the probe at the center position between the both sandwiching arms, and the measurement accuracy of the bent portion ridge line can be improved.
[0037]
Furthermore, according to the third feature of the present invention, there is provided a probe for measuring a hemming portion provided at the tip of an articulated arm of a three-dimensional coordinate measuring apparatus, wherein the shape of the ridge line of the bent portion of the hemming portion of the object to be measured is measured. , sliding in that so as to move to the contacted oneゝits longitudinal direction該稜line, a shank, branches from the tip of the shank bifurcated, across the bent portion of the hemming unit, on both side surfaces A pair of pinching arms that can project, and the shank protrudes between the pinching arms to accurately detect each position of the bent ridge line of the hemming portion by the three-dimensional coordinate measuring device. since the section of the bent portion on the ridge line to form a detection projection can slide, with sandwiching the hemming unit by both pinching arms, contacting the detection projection on the bent portion ridgeline of the hemming unit, the probe to the bent portion ridgeline along The simple operation of sliding Te, and accurately detected by the position three-dimensional coordinate measuring device of the bent portion ridgeline corresponding to the detection projection, it is possible to measure its shape. In addition, the structure of the probe is extremely simple and can be provided at a low cost.
[0038]
Furthermore, according to the fourth feature of the present invention, since the cross section of the detection projection is formed in a semi-cylindrical shape, it is possible to accurately measure the hemming portion, particularly the convex corner portion.
[0039]
Furthermore, according to the fifth feature of the present invention, since the cross section of the detection projection is formed in a triangular prism shape, the hemming portion, particularly the concave corner portion can be measured accurately.
[Brief description of the drawings]
FIG. 1 is a side view of a three-dimensional coordinate measuring apparatus provided with a hemming section measuring probe according to a first embodiment of the present invention.
FIG. 2 is an enlarged side view of the probe.
FIG. 3 is a view taken along arrow 3-3 in FIG. 2;
4 is a view taken along arrow 4-4 in FIG. 2;
FIG. 5 is a side view corresponding to FIG. 1, showing a process of setting the probe to the object to be measured.
FIG. 6 is a perspective view of a three-dimensional coordinate measuring apparatus including a hemming portion measuring probe according to a second embodiment of the present invention.
7 is an enlarged cross-sectional view taken along line 7-7 in FIG.
8 is a view on arrow 8-8 in FIG.
9 is a sectional view corresponding to FIG. 8, showing a third embodiment of the present invention.
[Explanation of symbols]
B ... Measured part (car body)
D ... Measured part (door)
T ... Measured part (tailgate)
L ... Bent part ridge line 10, 110 ... Hemming part measuring device 13, 113, 213 ... Probe 16 ... Pinching arm (fixed pinching arm)
17 .. Clipping arm (movable pinching arm)
18 ··· Detection unit 20 ··· Support shaft (support bolt)
22. Balance spring 23 ... Balance spring 26 ... Hemming portion 26a ... Bending portion 27 ... Rolling member (roller)
28 ... Rolling member (roller)
30 ... Shank 33 ... Cylindrical detection projection 34 ... Triangular column detection projection

Claims (5)

A probe for measuring a hemming portion provided at the tip of the articulated arm (12) of the three-dimensional coordinate measuring device (10),
To measure the shape of the bent portion ridgeline of hemming portion of the object (B) (26) (L ), One is contacted with該稜line (L)ゝin that so as to move in its longitudinal direction,
A pair of pinching arms (16, 17) straddling the bent portion (26a) of the hemming portion (26) and facing both side surfaces thereof, and corresponding hemming portions provided on the respective pinching arms (16, 17) ( 26) Each position of the bent portion ridge line (L) of the hemming portion (26) is accurately detected by the rolling members (27, 28) that can roll on the side surface of the 26) and the three-dimensional coordinate measuring device (10). the supported between two pinching arms (16, 17), characterized by being configured out with roller-type detector capable of rolling the bent portion ridgeline (L) above (18) for, for hemming unit measurement probe The probe for measuring a hemming part according to claim 1,
The distance between the pair of sandwiching arms (16, 17) can be adjusted, and the detection unit (18) can be rotatably and slidably supported on a support shaft (20) disposed between the sandwiching arms (16, 17). In addition, a pair of balance springs (22, 23) for biasing the detecting portion (18) to the center position between the both sandwiching arms (16, 17) are interposed between the both sandwiching arms (16, 17). A probe for measuring a hemming part. A probe for measuring a hemming portion provided at the tip of an articulated arm (112) of a three-dimensional coordinate measuring device (110),
DUT (D, T) to measure the shape of the bent portion ridgeline (L) of the hemming unit (26), in that so as to move to the contacted Oneゝits longitudinal direction該稜line (L),
A shank (30) and a pair of sandwiching arms (31) that can be bifurcated from the tip of the shank (30) and slid on both sides of the hemming portion (26) across the bent portion (26a). , 31 ′),
The shank (30) includes both sandwiched arms (31, 31 ') for accurately detecting each position of the bent portion ridge line (L) of the hemming portion (26) by the three-dimensional coordinate measuring device (10 ). A probe for measuring a hemming part, characterized in that detection protrusions (33, 34) that protrude inwardly and slide on the ridge line (L) of the hemming part (26) are formed. The hemming part measuring probe according to claim 3,
A probe for measuring a hemming part, wherein a cross section of the detection protrusion (33) is formed in a substantially semi-cylindrical shape. Oite the hemming unit measuring probe according to claim 3,
A probe for measuring a hemming part, wherein a cross section of the detection protrusion (34) is formed in a triangular prism shape.

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