JP2013079904A - Frame member inspection jig, frame member inspection device, and method for inspecting frame member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use an inexpensive measuring apparatus and easily and accurately measure various inspection object parts with different measuring directions, from a same direction.SOLUTION: A frame member inspection device 10 measures a position of an inspection object part that is provided on a frame member 12, and inspects accuracy of the measured position. The inspection device 10 includes: a retaining mechanism 50 that retains the frame member 12 at a predetermined attitude; inspection jigs 52 each of which is directly mounted on the inspection object part on the frame member 12 and provided with a measurement hole 86 corresponding to the inspection object part and heading toward the lateral direction of the frame member 12; and measurement mechanisms 56L and 56R that detect the accuracy of the position of the inspection object part on the basis of the position information of the measurements hole 86 calculated by measuring the measurement holes 86.

Description

  The present invention relates to a frame member inspection jig, a frame member inspection apparatus, and a frame member inspection method that are directly attached to the inspection region when measuring the position of the inspection region provided on the frame member.

  Various parts are attached to a frame member, for example, a motorcycle frame. For this reason, after the frame is manufactured, an operation of measuring positions of various attachment portions provided on the frame, for example, various hole portions such as a seat attachment bolt hole and a cowl clip insertion hole is performed. Furthermore, based on the measured position of each hole, the position accuracy of each attachment site is detected to determine whether the frame is good or bad.

  For example, the sensing method disclosed in Patent Document 1 is characterized in that all of predetermined portions are sensed from one direction on the front side or rear side of a motorcycle frame by a sensing device. Thus, the frame can be sensed by one sensing device, and the sensing system can be reduced in size and cost.

JP 2010-145348 A

  By the way, for example, holes (inspected parts) provided in a motorcycle frame are formed in various directions such as an oblique direction in addition to an up-down direction and a lateral direction (left-right direction). For this reason, it is necessary to change the orientation of the measuring probe and arm according to the orientation of the hole, especially when using an inexpensive two-dimensional measuring device instead of an expensive three-dimensional measuring device as a measuring device. There is a problem that the efficiency of the whole measurement work is reduced.

  The present invention solves this type of problem, and uses a low-cost measuring device and can easily and accurately measure various inspected parts having different measuring directions from the same direction. It is an object to provide an inspection jig for a frame, an inspection apparatus for a frame member, and an inspection method for a frame member.

  The present invention relates to an inspection jig for a frame member that is directly attached to the inspection site when measuring the position of the inspection site provided on the frame member.

  The frame member inspection jig has a centering portion that fits into a hole provided in a region to be inspected, a main body portion that is sucked and held in the inspection region, and the centering portion on the main body portion. And a measurement hole provided on the measurement surface and extending in the lateral direction of the frame member.

  The present invention also relates to a frame member inspection apparatus that measures the position of a region to be inspected provided in a frame member and inspects the accuracy of the measured position.

  This frame member inspection apparatus is directly attached to a part to be inspected of the frame member, a holding mechanism for holding the frame member in a predetermined posture, and corresponds to the part to be inspected and in a lateral direction of the frame member. An inspection jig provided with a measurement hole portion to be directed, and a measurement mechanism for detecting the position accuracy of the inspected portion based on position information of the measurement hole portion calculated by measuring the measurement hole portion. Yes.

  Further, in this frame member inspection apparatus, the inspection jig has a centering portion that fits into a hole provided in the inspection site, and a main body portion that is sucked and held by the inspection site, and the main body portion In addition, it is preferable to include a measurement surface provided along the axis of the centering portion and on which a measurement hole portion is formed.

  Furthermore, in this frame member inspection apparatus, the measurement mechanism preferably includes a two-dimensional measuring device and a laser displacement meter.

  The present invention also relates to a frame member inspection method for measuring the position of a region to be inspected provided in a frame member and inspecting the accuracy of the measured position.

  The frame member inspection method includes a step of holding a master member and teaching a measurement point provided on the master member corresponding to the inspected portion; and the inspected portion of the frame member includes the inspected portion. An inspection jig provided with a measurement hole portion corresponding to a portion and extending in the lateral direction of the frame member is directly mounted, and the step of holding the frame member instead of the master member and measuring the measurement hole portion And calculating the position information of the measurement hole, and detecting the position accuracy of the region to be inspected based on the calculated position information.

  According to the frame member inspection jig according to the present invention, the main body is mounted with high accuracy to the hole provided in the inspected site, and the measurement hole provided in the measurement surface of the main body. Are arranged in the lateral direction of the frame member. Accordingly, all the measurement hole portions corresponding to various hole portions having different measurement directions are arranged in the lateral direction of the frame member. Thereby, the position of each hole part can always be measured easily and reliably from the same direction (lateral direction).

  Further, according to the frame member inspection apparatus of the present invention, the inspection jig is directly mounted on the inspected portion of the frame member, and the measurement hole provided in the inspection jig always has the frame. It arrange | positions toward the horizontal direction of a member. For this reason, it is not necessary to change the direction of the measurement mechanism, and it is possible to easily and reliably measure the positions of various hole portions having different measurement directions using a simple and inexpensive measurement mechanism. Thereby, based on the position information of the measurement hole, the position accuracy of the region to be inspected can be detected efficiently.

  Furthermore, according to the inspection method for a frame member according to the present invention, after the teaching of the measurement point corresponding to the inspected site is performed using the master member, the frame member is held, while the frame member is inspected. The jig is mounted directly. Therefore, it is possible to efficiently and accurately detect the position accuracy of the part to be inspected based on the position information of the measurement hole provided in the inspection jig.

It is an isometric view explanatory drawing of the inspection apparatus for frame members concerning the embodiment of the present invention. It is a perspective explanatory view of a frame member. It is a section explanatory view of other grasping parts. It is a perspective explanatory view of an inspection jig which constitutes the inspection device. It is sectional drawing of the said inspection jig. It is a perspective explanatory view of another inspection jig which constitutes the inspection device. It is a flowchart explaining the inspection method for frame members concerning the embodiment of the present invention. It is a perspective explanatory view in the state where a master member was attached to the inspection device. It is explanatory drawing of the camera image before teaching. It is explanatory drawing of the camera image after teaching. It is explanatory drawing of the camera image at the time of a reference | standard device measurement. It is explanatory drawing of the camera image of the said inspection jig. It is explanatory drawing of the camera image of a measurement hole part. It is explanatory drawing of irradiation position correction | amendment by a laser displacement meter. It is the XV arrow directional view in FIG. 14 of the said inspection jig explaining the said irradiation position correction | amendment. It is the XVI arrow directional view in FIG. 14 of the said inspection jig explaining the said irradiation position correction | amendment.

  As shown in FIG. 1, the frame member inspection apparatus 10 according to the embodiment of the present invention measures the position accuracy by measuring the position of each inspected portion of a frame member, for example, a motorcycle frame member 12. As the frame member, various frame members can be used in addition to those for motorcycles.

  As shown in FIG. 2, the frame member 12 includes a front frame 14a and a rear frame 14b. The front frame 14 a has a head pipe 16, and a main pipe 18 extends rearward from the head pipe 16. A support portion 20 is provided at the lower end of the rear end of the main pipe 18. The rear frame 14 b has a pair of left and right tubes 22 welded to the rear end of the main pipe 18, and a pair of connecting tubes 24 are welded to the tubes 22 and the main pipe 18.

  Cross members 26 and 28 are sequentially connected between the tubes 22 and 22 from the front side to the rear side. A cylindrical portion 30 is formed at a predetermined position on the inclined portion of each tube 22 and the cross member 26 is provided with an inclined cylindrical portion 32 inclined in the horizontal direction from above. Each tube 22 located on the extension of the cross member 26 is provided with a pin portion 34 protruding in the lateral direction (horizontal direction). The cross member 28 is provided with a pair of cylindrical portions 36 upward.

  As the inspected portion of the frame member 12, for example, a hole 38 provided in the axial direction of the head pipe 16 (inclination axis direction inclined by a predetermined angle from the vertical direction), and a hole provided in each cylinder 30 in the vertical direction. 40, a hole 42 provided in the inclined cylinder part 32 so as to incline from the vertical direction, a hole 44 provided in each cylinder part 36 in the vertical direction, and each pin part 34.

  As shown in FIG. 1, the inspection apparatus 10 includes a holding mechanism 50 that holds the frame member 12 in a predetermined posture, inspection jigs 52 and 54 that are directly attached to the inspection site of the frame member 12, and the inspection Measuring mechanisms 56L and 56R that measure the measurement holes (described later) of the jigs 52 and 54 and detect the positional accuracy of the inspected part are provided.

  The holding mechanism 50 includes a base 58, and a grip 60 that grips the support 20 of the frame member 12 is provided on the base 58. The grip portion 60 includes a fixed grip member 62 disposed on one surface side of the support portion 20 and a movable grip member 66 disposed on the other surface side of the support portion 20 and capable of moving forward and backward via a cylinder 64. Is provided.

  FIG. 3 shows another grip 60a. The gripping portion 60a includes a pair of taper pins 61 that are fitted to both ends of the support portion 20, a pair of surface receiving members 63 that are slidably received in the taper pins 61 and pressed against both end surfaces of the support portion 20. Is provided.

  As shown in FIG. 1, a height regulating member 68 that regulates the height direction of the head pipe 16 of the frame member 12 is disposed on the distal end side on the base 58. A reference device 72 is disposed on the rear side of the base 58 via a substrate 70. The reference device 72 has a substantially L-shaped reference plate erected on the substrate 70, and is used for measuring device zero reset, as will be described later. The reference device 72 is formed with a reference hole 74 serving as a reference point.

  As shown in FIGS. 4 and 5, the inspection jig 52 has a centering portion 80 that fits into the hole portion 40 or the like that is a portion to be inspected, and a main body portion 82 that is sucked and held by the frame member 12; The main body portion 82 includes a measurement surface 84 provided along the axis of the centering portion 80, and a measurement hole portion 86 provided on the measurement surface 84 and extending in the lateral direction of the frame member 12.

  The main body 82 has a cylindrical shape with a small diameter on the tip side, and a stepped hole 88 is formed inside. The centering portion 80 includes a taper pin 90 having a tapered tip, and the taper pin 90 is slidably fitted to the small diameter side of the stepped hole 88. A large-diameter flange portion 92 is provided at the rear end portion of the taper pin 90, and the flange portion 92 is slidably fitted into the large-diameter portion of the stepped hole portion 88 and is externally attached via a spring 94. (The hole 40 and the like side). By using the taper pin 90, centering can be performed easily and accurately, and even if the hole diameters of the hole portions 40, 42, 44, etc., which are parts to be inspected, are different, it can be easily handled.

  An adsorption magnet 96 is embedded in the distal end portion of the main body portion 82. The measurement surface 84 is attached to the upper portion of the main body portion 82 and is configured on one surface of a plate-like portion 98 having a rectangular shape.

  As shown in FIG. 6, the inspection jig 54 is formed of a cylindrical body that is externally mounted on each pin portion 34. The total length L1 of the inspection jig 54 is set to be longer (L1> L2) than the total length L2 of the pin portion 34 on which the inspection jig 54 is packaged. On one end side of the inspection jig 54, a measurement hole 54 a is arranged in the lateral direction of the frame member 12.

  The measurement mechanisms 56L and 56R are configured in the same manner, and the measurement mechanism 56L will be described below. The measurement mechanism 56R is denoted by the same reference numeral, and detailed description thereof is omitted.

  As shown in FIG. 1, the measurement mechanism 56 </ b> L includes a support base 100, and a first rail member 102 extending in the direction of arrow B is fixed on the support base 100. On the first rail member 102, a first slide portion 104 is disposed so as to be movable back and forth in the direction of arrow B, and a second rail member 106 extending in the direction of arrow A is integrated with the first slide portion 104. Is provided.

  The second rail member 106 is provided with a guide rail on a vertical surface, and a second slide portion 108 is attached to the second rail member 106 so as to be movable forward and backward in the direction of arrow A. The second slide portion 108 is provided with a third rail member 110 extending in the direction of arrow C. A measuring instrument 112 is attached to the third rail member 110 so as to be able to advance and retract in the direction of arrow C.

  The measuring instrument 112 includes a two-dimensional measuring instrument arranged at the center of the ring light 114, for example, a CCD camera 116, and a laser displacement meter 118 arranged on the side of the CCD camera 116.

  The operation of the inspection apparatus 10 configured as described above will be described below along the flowchart shown in FIG. 7 in relation to the inspection method according to the present embodiment. The measurement mechanisms 56L and 56R operate in the same manner, and only the measurement mechanism 56L will be described below.

  First, the master member 120 corresponding to the frame member 12 that is a measurement object is set in the holding mechanism 50 (step S1). As shown in FIG. 8, the master member 120 includes holes 40 and 40 in the cylindrical portions 30 and 30, which are inspected portions of the frame member 12, holes 42 in the inclined cylindrical portion 32, and holes in the cylindrical portions 36 and 36. Measurement points P1, P1, P2, P3, P3 and P4, P4 are arranged at the same positions as the portions 44 and 44 and the pin portions 34 and 34, respectively.

  In the measurement mechanism 56L, the measuring instrument 112 is arranged corresponding to each measurement point P1 to P4 of the master member 120 by a triaxial orthogonal actuator. At this time, there is a case where the measurement point P1 is deviated from the image center O of the CCD camera 116 in a state where the measuring device 112 is arranged corresponding to the design position of the measurement point P1 (see FIG. 9).

  Here, with respect to the camera center O, the center position of the measurement point P1 is shifted by Ta on the T axis (horizontal direction) (arrow A direction) and by Ha on the H axis (vertical direction) (arrow C direction). This is detected by the CCD camera 116. On the other hand, it is detected by the laser displacement meter 118 that it is shifted by Ba with respect to the B axis (in the direction of arrow B). Therefore, the measuring instrument 112 performs teaching based on the measurement value obtained by the CCD camera 116 and the measurement value obtained by the laser displacement meter 118 (see FIG. 10).

  In the same manner as described above, the relative positions at the other measurement points P2, P3, and P4 are measured, and teaching is performed (step S2). When the measurement position teaching by the master member 120 is completed, the process proceeds to step S 3, and the frame member (actual workpiece) 12 is positioned and held by the holding mechanism 50 instead of the master member 120.

  Next, the process proceeds to step S4, and zero reset processing of the measuring instrument 112 is performed using the reference device 72. In this zero reset process, as described above, teaching of the measuring instrument 112 has been completed, and the measuring instrument 112 measures the reference hole 74 of the reference instrument 72.

  As shown in FIG. 11, when measuring the reference hole 74 by the measuring instrument 112 after teaching, the center position of the reference hole 74 is Tb on the T axis, only Hb on the H axis, and on the B axis. When only Bb has changed minutely, each minute change is reset to zero. That is, the center position of the reference hole 74 detected by the measuring instrument 112 is set to zero on the T axis, the H axis, and the B axis. This cancels the position error of the measuring instrument 112 during teaching and measurement.

  Here, the process proceeds to step S <b> 5, and for example, the measurement hole 86 provided in the predetermined inspection jig 52 is measured by the CCD camera 116 constituting the measuring instrument 112. The CCD camera 116 images the measurement hole 86 provided in the measurement surface 84 of the inspection jig 52 and searches for a circular shape.

  Then, as shown in FIG. 12, the image is converted into black and white, and the center coordinates of the measurement hole 86 are calculated from the area centroid of the white circle (measurement hole 86). Therefore, as shown in FIG. 13, measured values Δt and Δh in the T-axis direction and the H-axis direction of the measurement hole 86 are obtained, and Δt and Δh are set as the laser irradiation position correction amount of the laser displacement meter 118. The

  In the laser displacement meter 118, as shown in FIG. 14, the laser irradiation position Lb is shifted by Δt and Δh (refer to the two-dot chain line in FIG. 14), and the measurement hole 86 is corrected by correcting only Δt and Δh. Four laser irradiation positions Lb are corrected at the same distance from the center.

  The laser displacement meter 118 measures the depth (position in the B-axis direction) at the center of the measurement hole 86 from the four laser irradiation positions Lb irradiated on the measurement surface 84 (step S6).

  At this time, since four laser irradiation positions Lb are set on the measurement surface 84 of the inspection jig 52, it is only necessary that the direction of the measurement surface 84 faces the measuring instrument 112 side. That is, as shown in FIG. 15, even if the measurement surface 84 is inclined by an angle α1 ° with respect to the arrow A direction (horizontal direction), it is only necessary to detect an intermediate point between the two laser irradiation positions Lb.

  On the other hand, as shown in FIG. 16, even if the measurement surface 84 is inclined by an angle α2 ° with respect to the arrow C direction (vertical direction), it is only necessary to detect an intermediate point between the other two laser irradiation positions Lb. . Therefore, the measurement surface 84 may be inclined as long as it is within a certain angle range with respect to the measuring instrument 112 side, and the attachment work of the inspection jig 52 is simplified and a good measurement work can be performed. .

  In this way, for example, the position of the measurement hole 86 of the inspection jig 52 attached to the hole 40 of the cylinder 30 is measured. The position of the hole 40 is measured by subtracting the offset amounts in the T-axis direction and the H-axis direction between the measurement hole 86 and the hole 40 from the measurement position. The same processing is also performed in the hole 44 of the other cylinder 36 and the hole 42 of the inclined cylinder 32.

  On the other hand, the inspection jig 54 has a cylindrical shape, and the center position thereof is arranged concentrically with the center position of the pin portion 34. Therefore, when the center of the measurement hole 54a, which is the center position of the inspection jig 54, is measured, the position of the pin portion 34 is obtained by subtracting the offset amount in the B-axis direction from the measured value. Thereby, when the measurement by all the inspection jigs 52 and 54 is completed (YES in step S7), the measurement process ends.

  In this case, in this embodiment, as shown in FIG. 5, the inspection jig 52 includes a centering portion 80, and the taper pin 90 that constitutes the centering portion 80 is under the pressing action of the spring 94. Centering is performed by being inserted into holes 40, 42 and 44 provided at the site to be inspected.

  Further, a magnet 96 is embedded at the distal end of the main body portion 82, and the distal end surface of the main body portion 82 is securely and firmly held to each site to be inspected. Therefore, the inspection jig 52 is mounted with high precision to each of the holes 40, 42 and 44, and the relative position between the holes 40, 42 and 44 and the measurement hole 86 provided on each measurement surface 84. There is an advantage that the accuracy is improved satisfactorily.

  In addition, the measurement hole portion 86 provided in the measurement surface 84 of the main body portion 82 is disposed toward the lateral direction (left-right direction) of the frame member 12. That is, all the measurement hole portions 86 corresponding to the respective hole portions 40, 42, and 44 that are directed in various different directions such as upward and obliquely upward are arranged in the lateral direction of the frame member 12. Thereby, the positions of the hole portions 40, 42 and 44 can always be reliably measured via the measurement hole portions 86 in the same direction (from the lateral direction).

  For this reason, in the inspection apparatus 10, it is only necessary to use the measurement mechanism 56L disposed at least on the side of the frame member 12, and it is only necessary to use the measurement mechanism 56L and the measurement mechanism 56R as necessary.

  Furthermore, the measurement mechanism 56L can measure only from the lateral direction of the frame member 12, and does not require a change in orientation. Therefore, the measuring mechanism 56L uses the measuring device 112 mounted on the three-axis orthogonal actuator, and the measuring device 112 can be constituted by the CCD camera 116 which is a two-dimensional measuring device and the laser displacement meter 118. become.

  Accordingly, it is not necessary to use an expensive three-dimensional measuring instrument, and the positions of various different holes 40, 42 and 44 of the frame member 12 can be easily and reliably measured using the simple and inexpensive measuring mechanism 56L. Can do. For this reason, based on the positional information on the measurement hole 86 of each inspection jig 52, it is possible to efficiently detect the positional accuracy of each of the holes 40, 42, and 44, which are inspected parts. can get.

  Furthermore, in the present embodiment, after teaching the inspection site using the master member 120, the frame member 12 is held, while the frame member 12 has inspection jigs 52 and 54 directly attached thereto. It is installed. The measuring instrument 112 has an advantage that highly accurate measurement is performed by relative measurement and detection position correction, and measurement errors are reduced as much as possible, and variations in measured values are reduced.

  Further, by using the measurement mechanisms 56L and 56R, it is possible to simultaneously measure from the left and right of the frame member 12. As a result, there is an effect that the measurement process can be speeded up easily.

DESCRIPTION OF SYMBOLS 10 ... Inspection apparatus 12 ... Frame member 30, 36 ... Tube part 32 ... Inclined cylinder part 34 ... Pin part 38, 40, 42, 44, 88 ... Hole part 50 ... Holding mechanism 52, 54 ... Inspection jig 56L, 56R ... Measuring mechanism 60, 60a ... gripping portion 68 ... height regulating member 72 ... reference device 74 ... reference hole portion 80 ... centering portion 82 ... main body portion 84 ... measuring surface 86 ... measuring hole portion 90 ... taper pin 96 ... magnet 98 ... plate -Shaped part 112 ... measuring instrument 116 ... CCD camera 118 ... laser displacement meter

Claims (5)

When measuring the position of the site to be inspected provided in the frame member, a frame member inspection jig that is directly attached to the site to be inspected,
A body portion that has a centering portion that fits into a hole provided in the site to be inspected, and is sucked and held in the site to be inspected;
A measurement surface provided on the main body portion along the axis of the centering portion;
A measurement hole provided in the measurement surface and directed in a lateral direction of the frame member;
An inspection jig for a frame member, comprising: A frame member inspection apparatus that measures the position of a portion to be inspected provided in a frame member and inspects the accuracy of the measured position,
A holding mechanism for holding the frame member in a predetermined posture;
An inspection jig that is directly attached to the inspection site of the frame member, and is provided with a measurement hole corresponding to the inspection site and extending in the lateral direction of the frame member;
Based on the position information of the measurement hole calculated by measuring the measurement hole, a measurement mechanism that detects the position accuracy of the inspection site;
An inspection apparatus for a frame member, comprising: 3. The frame member inspection apparatus according to claim 2, wherein the inspection jig has a centering portion that fits into a hole provided in the inspection site, and a main body portion that is sucked and held by the inspection site. ,
The main body portion is provided along the axis of the centering portion, and the measurement surface on which the measurement hole portion is formed,
An inspection apparatus for a frame member, comprising:   4. The frame member inspection apparatus according to claim 2, wherein the measurement mechanism includes a two-dimensional measuring device and a laser displacement meter. A frame member inspection method for measuring a position of an inspected portion provided in a frame member and inspecting accuracy of the measured position,
Holding the master member, and teaching the measurement points provided on the master member corresponding to the inspected part; and
The inspection member of the frame member is directly mounted with an inspection jig provided with a measurement hole corresponding to the inspection region and extending in the lateral direction of the frame member, and instead of the master member, Holding the frame member;
Measuring the measurement hole and calculating positional information of the measurement hole;
Detecting the position accuracy of the region to be inspected based on the calculated position information;
An inspection method for a frame member, comprising:

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