WO2021192989A1 - Three-stitch dimension measuring device and three-stitch dimension measuring method - Google Patents

Three-stitch dimension measuring device and three-stitch dimension measuring method Download PDF

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Publication number
WO2021192989A1
WO2021192989A1 PCT/JP2021/009140 JP2021009140W WO2021192989A1 WO 2021192989 A1 WO2021192989 A1 WO 2021192989A1 JP 2021009140 W JP2021009140 W JP 2021009140W WO 2021192989 A1 WO2021192989 A1 WO 2021192989A1
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WO
WIPO (PCT)
Prior art keywords
worm gear
needle
gauge
measuring device
holding
Prior art date
Application number
PCT/JP2021/009140
Other languages
French (fr)
Japanese (ja)
Inventor
鈴木弘朗
大澤一弘
Original Assignee
株式会社鈴木商店
株式会社モス
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Application filed by 株式会社鈴木商店, 株式会社モス filed Critical 株式会社鈴木商店
Publication of WO2021192989A1 publication Critical patent/WO2021192989A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters

Definitions

  • the present invention relates to a three-needle dimension measuring device and a three-needle dimension measuring method.
  • the dimension between the interdental grooves of the gears is generally inspected by measuring the overpin diameter, and a measuring device capable of reducing the trouble of measuring the overpin diameter is known (for example, a patent). Reference 1).
  • the overpin diameter may also be measured for a worm gear, which is a screw-shaped gear.
  • the overpin diameter of the worm gear is measured as a three-needle dimension measured using three rod-shaped gauges. Of the three gauges, two are located in the thread groove located on one side of the center axis of the worm gear, and the other gauge is opposite across the center axis of the worm gear. It is placed in the thread groove located on the side so as to face the two gauges.
  • the three-needle dimension is measured by reading the distance between gauges arranged opposite to each other with the worm gear in between, for example, with a micrometer.
  • the thread grooves of the worm gear are provided in a spiral shape, and it is difficult to arrange the three gauges used for measurement in the same manner for any worm gear to be inspected. If the position where the gauge is arranged is different for each worm gear to be inspected, the measurement error will be large and it will be difficult to maintain the quality level of a large number of worm gears. Patent Document 1 does not assume that the overpin diameter of the worm gear is measured, and does not solve such a problem.
  • the present invention has been made in view of the above problems, and an object of the present invention is to improve the measurement accuracy of the three-needle dimension in a worm gear.
  • the three-needle dimension measuring device of the present invention adjusts the extraction unit that extracts the characteristic portion on the outer shape of the worm gear to be measured for the three-needle dimension and the worm gear so that the characteristic portion is arranged at a predetermined position.
  • the adjusting unit and the worm gear whose state has been adjusted by the adjusting unit are supplied, and a gauge for measuring the three-needle dimension of the supplied worm gear is formed in the threaded portion of the worm gear. It is characterized by being provided so as to be in contact with and separated from the gear, and provided with a measuring table for measuring the three-needle dimension of the worm gear in a state where the gauge is arranged in the thread groove.
  • the extraction unit includes an imaging unit that images the appearance of the worm gear, and performs an appearance inspection of the worm gear based on the imaging data of the worm gear imaged by the imaging unit.
  • the mode may be further provided with a visual inspection unit.
  • the extraction unit can be in a mode of extracting the end portion of the screw portion as a feature portion.
  • the measuring table holds a first holding portion for holding the first gauge and the second gauge included in the gauge, and a third gauge included in the gauge.
  • the three-needle dimension measuring device is further provided with a fixture for fixing the first holding portion to the first reference portion and a fixture for fixing the second holding portion to the second reference portion. Can be done.
  • the adjusting portion includes a grip portion that grips the end portion of the worm gear and a rotating portion that rotates the worm gear gripped by the grip portion around an axis. can do.
  • the worm gear is gripped and at least a position where the extraction unit extracts the characteristic portion and a transport unit for sequentially transporting the worm gear to the measuring table are provided. good.
  • the transport unit may be provided on a rotary table, and the position where the extraction unit extracts the characteristic portion and the measurement table may be arranged around the rotary table, respectively.
  • the three-needle dimension measurement method of the present invention includes an extraction step of extracting a feature portion on the outer shape of the worm gear to be measured for the three-needle dimension, and adjusting the worm gear to a state in which the feature portion is arranged at a predetermined position.
  • the adjusting step and the worm gear whose state has been adjusted in the adjusting step are held by the first holding portion for holding the first gauge, the second gauge and the third gauge, and the first holding portion. It is characterized by including a step of supplying the worm gear between the second holding portion and the second holding portion provided so as to be relatively close to each other and a measuring step of measuring the three-needle dimension of the worm gear.
  • FIG. 1 is an explanatory diagram schematically showing a schematic configuration of a three-needle dimension measuring device according to an embodiment.
  • 2 (A) to 2 (C) are drawings showing the outer shape of the worm gear to be measured, FIG. 2 (A) is a front view, FIG. 2 (B) is a side view, and FIG. 2 (C) is a side view. It is a perspective view.
  • 3 (A) to 3 (C) are drawings showing a holding table, FIG. 3 (A) is a plan view, FIG. 3 (B) is a side view, and FIG. 3 (C) is a front view.
  • FIG. 4 (A) is an explanatory view showing how the first roller included in the grip portion descends, and FIG.
  • FIG. 4 (B) is an explanatory view showing how the worm gear is gripped by the grip portion.
  • C) is an explanatory view showing how the worm gear gripped by the grip portion is rotated.
  • 5 (A) and 5 (B) are explanatory views showing how the worm gear is supplied onto the supply tray, FIG. 5 (A) is an explanatory view viewed from above, and FIG. 5 (B) is a side view. It is an explanatory diagram seen from the side.
  • FIG. 6 is an explanatory view showing how the worm gear is rotated by the second camera to image the outer shape of the worm gear, and the worm gear is rotated to arrange the characteristic portion of the worm gear at a predetermined position. be.
  • FIG. 6 is an explanatory view showing how the worm gear is rotated by the second camera to image the outer shape of the worm gear, and the worm gear is rotated to arrange the characteristic portion of the worm gear at a predetermined position. be.
  • FIG. 7A is an explanatory view showing how the worm gear rotates
  • FIG. 7B is an example of an image obtained by imaging the rotating worm gear.
  • 8 (A) and 8 (B) are explanatory views showing a state in which a gauge is arranged on the threaded portion of the worm gear in order to measure the three-needle dimension
  • FIG. 8 (A) shows a state viewed from above. It is explanatory drawing which shows typically
  • FIG. 8B is an explanatory view which shows the state which it saw from the front.
  • FIG. 9 is a perspective view schematically showing a state in which a gauge is arranged in the thread groove of the worm gear in order to measure the three-needle dimension.
  • FIG. 9 is a perspective view schematically showing a state in which a gauge is arranged in the thread groove of the worm gear in order to measure the three-needle dimension.
  • FIG. 10 is an explanatory view schematically showing the three-needle dimension.
  • 11 (A) and 11 (B) are explanatory views showing a schematic configuration of a discharge stage, FIG. 11 (A) is an explanatory view viewed from above, and FIG. 11 (B) is an explanatory view viewed from the front. It is a figure.
  • FIG. 12 is an example of a flowchart showing a method of measuring the three-needle dimension.
  • FIG. 13 is an explanatory diagram schematically showing another example of specifying a characteristic portion in the worm gear.
  • FIG. 1 is an explanatory diagram schematically showing a schematic configuration of the measuring device 1 of the embodiment.
  • the measuring device 1 measures the three-needle dimension of the worm gear 100.
  • the measuring device 1 includes an index table 2 which is a rotary table rotatably provided by the drive motor 2a.
  • a charging stage 20 for supplying the worm gear 100, an appearance inspection stage 30 for imaging the outer shape of the worm gear 100, a three-needle dimension measuring stage 40 as a measuring table for measuring the three-needle dimension, and a discharging stage 50 are arranged.
  • the loading stage 20, the visual inspection stage 30, the three-needle dimension measuring stage 40, and the discharging stage 50 are arranged at intervals of 90 °.
  • each holding table 10 for holding the worm gear 100 is arranged at intervals of 90 °.
  • the four holding tables 10 circulate from the input stage 20 to the discharge stage 50 by rotating the index table 2.
  • each holding table 10 can move forward and backward along the radial direction of the index table 2.
  • FIGS. 2 (A) to 2 (C) are drawings showing the outer shape of the worm gear 100 to be measured
  • FIG. 2 (A) is a front view
  • FIG. 2 (B) is a side view
  • FIG. 2 (C) Is a perspective view.
  • the specific shape of the screw portion 104 is omitted.
  • the worm gear 100 includes a first end portion 101 and a second end portion 102.
  • the worm gear 100 includes a chamfered portion 103 on the first end 101 side and a threaded portion 104 on the second end 102 side.
  • the threaded portion 104 is provided with a spirally continuous threaded groove 105.
  • the chamfered portions 103 are provided at two locations separated by 180 °.
  • the threaded portion 104 has a first end 101 side as its cutting start portion 104a and a second end 102 side as its cutting end portion 104b.
  • the holding base 10 grips the first end 101 side of the worm gear 100 and patrols each stage.
  • the measuring device 1 includes a control unit 3.
  • the control unit 3 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a storage unit (for example, an HDD (Hard Disk Drive)), an input / output interface, and a drive for a portable storage medium. Etc. are provided. Each of these components of the control unit 3 is connected to a bus.
  • the CPU executes a program stored in the ROM or HDD, or a program read from the portable storage medium by the drive for the portable storage medium, and a part of the functions of the control unit 3 is realized.
  • FIGS. 3 (A) to 3 (C) and FIGS. 4 (A) to 4 (C) together with FIG. 3 (A) to 3 (C) are drawings showing the holding table 10, FIG. 3 (A) is a plan view, FIG. 3 (B) is a side view, and FIG. 3 (C) is a front view.
  • FIG. 4A is an explanatory view showing how the first roller 14a included in the grip portion 14 descends
  • FIG. 4B is an explanatory diagram showing how the grip portion 14 grips the worm gear 100.
  • FIG. 4C is an explanatory view showing how the worm gear 100 gripped by the grip portion 14 is rotated.
  • the holding table 10 functions as a transport unit, and four holding tables 10 are arranged on the index table 2. Each holding table 10 is the same.
  • the holding base 10 includes a main body portion 11, an elevating column 12, a slider 13, and a grip portion 14.
  • the main body 11 is provided so as to be able to move forward and backward on the index table 2 as shown by arrow 15 in FIG.
  • the main body 11 is electrically connected to the forward / backward instruction unit 3c included in the control unit 3, and is positioned at a position suitable for the process executed in each stage based on the instruction of the forward / backward instruction unit 3c. You can move.
  • the elevating column 12 is provided on the main body 11 so that the holding table 10 is mounted on the index table 2 and is located on the outer peripheral side of the index table 2, that is, so as to face each stage.
  • a slider 13 is provided on the elevating column 12 so as to be slidable along the vertical direction of the elevating column 12.
  • the grip portion 14 includes a first roller 14a, a second roller 14b, and a third roller 14c.
  • the first roller 14a is provided on the slider 13.
  • the second roller 14b and the third roller 14c are provided on the main body 11.
  • the second roller 14b and the third roller 14c are provided in parallel so that their outer peripheral surfaces are in contact with each other.
  • the second roller 14b corresponds to a rotating portion and is rotationally driven by a motor (not shown). As the second roller 14b rotates, the worm gear 100 rotates around the axis AX.
  • a rotation instruction unit 3e included in the control unit 3 is electrically connected to the motor that drives the second roller 14b.
  • the second roller 14b is rotationally driven, but the first roller 14a or the third roller 14c may be rotationally driven. Further, a plurality of rollers may be subject to rotational drive. In short, it suffices if the worm gear 100 gripped by the grip portion 14 can be rotated.
  • a gripping instruction unit 3d included in the control unit 3 is electrically connected to the slider 13.
  • the worm gear 100 is supplied between the first roller 14a and the third roller 14c
  • the slider 13 is lowered as shown in FIG. 4A based on the instruction of the gripping instruction unit 3d
  • FIG. 4A the instruction of the gripping instruction unit 3d
  • FIG. 4B the worm gear 100 is gripped.
  • the second roller 14b rotates as shown by the arrow 71 based on the instruction of the rotation indicating unit 3e
  • the worm gear 100 rotates as shown by the arrow 72.
  • FIGS. 5 (A) and 5 (B) are explanatory views showing how the worm gear 100 is supplied onto the supply tray 22, and FIG. 5 (A) is an explanatory view viewed from above, FIG. 5 (B). Is an explanatory diagram seen from the side.
  • the loading stage 20 includes a feeder 21, a supply tray 22, a reversing device 23, and a first camera 24.
  • the feeder 21 is a gutter-shaped member.
  • the feeder 21 sequentially feeds the worm gear 100 toward the index table 2 as shown by arrow 73 from a product hopper (not shown) in which the manufactured worm gear 100 is stocked.
  • the supply tray 22 is provided so as to face the downstream end of the feeder 21.
  • a wall-shaped stopper 22a is provided at the downstream end of the supply tray 22.
  • the worm gear 100 that has flowed down on the feeder 21 stays on the supply tray 22 in a state of being in contact with the stopper 22a.
  • the reversing device 23 sets the direction of the worm gear 100 on the supply tray 22 when the direction is different from the predetermined direction, that is, when the first end 101 is different from the direction facing the holding base 10. Invert it to the desired orientation. Whether or not the worm gear 100 on the supply tray 22 is in a predetermined direction is determined by the direction determination unit 3a included in the control unit 3 based on the image captured by the first camera 24.
  • the reversing device 23 is arranged so as to face each other, and includes a pair of claws that can be opened and closed as shown by arrow 74. Further, the reversing device 23 is provided so as to be able to move up and down as shown by arrow 76.
  • the reversing device 23 can rotate as shown by arrow 75 based on the instruction of the reversing instruction unit 3b included in the control unit 3 to reverse the direction of the worm gear 100.
  • the worm gear 100 on the supply tray 22 is delivered to the holding base 10, the worm gear 100 is sandwiched by the reversing device 23 and lifted. Therefore, even if the direction of the worm gear 100 thrown onto the supply tray 22 is a predetermined direction, the reversing device 23 sandwiches and lifts the worm gear 100 on the supply tray 22.
  • FIG. 6 shows a state in which the worm gear 100 is rotated by the second camera 31 to image the outer shape of the worm gear 100, and the worm gear 100 is rotated to arrange the characteristic portion of the worm gear 100 at a predetermined position.
  • FIG. 7A is an explanatory view showing how the worm gear 100 rotates
  • FIG. 7B is an example of an image obtained by imaging the rotating worm gear 100.
  • the appearance inspection stage 30 performs an appearance inspection of the worm gear 100 based on the imaging data of the second camera 31 as an imaging unit that images the appearance of the worm gear 100 and the worm gear 100 imaged by the second camera 31. It is equipped with an inspection unit of 3 g.
  • the image captured by the second camera 31 is used for inspecting the appearance of the worm gear 100 by the appearance inspection unit 3g, and is also used for extracting the external features of the worm gear 100.
  • the second camera 31 rotates the second roller 14b as a rotating portion, rotates the worm gear 100 gripped by the grip portion 14 as shown by arrow 77, and continuously images the appearance thereof.
  • the appearance inspection is performed by the appearance inspection unit 3g, and based on the captured image, the screw portion 104 of the worm gear 100 is inspected for scratches or chips, and for foreign matter. ..
  • the cutting start portion 104a of the screw portion 104 is adopted as a characteristic portion on the outer shape of the worm gear 100. Therefore, the second camera 31 functions as an extraction unit for extracting the characteristic portion on the outer shape of the worm gear 100 together with the cutting start portion extraction unit 3f included in the control unit 3. As described above, in the present embodiment, the appearance inspection and the extraction of the characteristic portion of the worm gear 100 are performed based on the image pickup data captured by the second camera 31, so that the inspection can be performed efficiently.
  • FIG. 7B shows a captured image when the worm gear 100 is rotated 2.5 times.
  • the feature portion 104a1 showing the shape of the cutting start portion 104a appears twice.
  • the cutting start portion extraction unit 3f determines which part in the captured image indicates the cutting start portion 104a from the information regarding the shape indicating the cutting start portion 104a stored in advance, and sets the coordinates of that portion to X1.
  • the rotation indicating unit 3e electrically connected to the second roller 14b also functions as an adjusting unit that adjusts the worm gear 100 so that the cutting start portion 104a, which is a characteristic portion thereof, is arranged at a predetermined position.
  • the predetermined position is the coordinate X0 showing the feature portion 104a1 showing the shape of the cutting start portion 104a in the image of the worm gear 100 designated as the master piece.
  • the master piece indicates a reference of a position where the first gauge 45a, the second gauge 45b, and the third gauge 45c (see FIG. 8A and the like), which will be described later, are brought into contact with each other when measuring the three-needle dimension.
  • the worm gear 100 selected for this purpose.
  • the rotation instruction unit 3e rotates the worm gear 100 to be measured from the coordinates X1 indicating the cutting start portion 104a of the worm gear 100 to be measured and the coordinates X0 indicating the cutting start portion 104a of the worm gear 100 designated as the master piece. Calculate the angle. That is, the rotation angle is calculated so that the position of the cutting start portion 104a of the worm gear 100 to be measured coincides with the cutting start portion 104a of the worm gear 100 designated as the master piece.
  • the rotation instruction unit 3e rotates the second roller 14b so that the worm gear 100 gripped by the grip unit 14 is rotated by the calculated rotation angle.
  • the first gauge 45a and the second gauge 45b are contained in the thread groove 105 with the same reference. And a third gauge 45c can be placed.
  • the cutting start portion 104a is selected as the feature portion, but the feature portion is not limited to this, and for example, the cutting end portion 104b may be selected as the feature portion. If there is another part that can be specified as a feature part in the outer shape, that part may be selected as the feature part.
  • 8 (A) and 8 (B) are explanatory views showing a state in which gauges 45a, 45b, and 45c are arranged on the threaded portion 104 of the worm gear 100 in order to measure the three-needle dimension
  • FIG. 8 (A) shows. Is an explanatory view schematically showing a state viewed from above
  • FIG. 8B is an explanatory view showing a state viewed from the front.
  • FIG. 9 is a perspective view schematically showing how the gauges 45a, 45b, and 45c are arranged in the thread groove 105 of the worm gear 100 in order to measure the three-needle dimension.
  • FIG. 10 is an explanatory view schematically showing the three-needle dimension.
  • the three-needle dimension measurement stage 40 includes a first reference plate 41 and a second reference plate 42.
  • the first reference plate 41 includes a first reference surface 41a as a first reference portion.
  • the second reference plate 42 includes a second reference surface 42a as a second reference portion.
  • the first reference plate 41 and the second reference plate 42 are provided so that the first reference surface 41a and the second reference surface 42a are arranged so as to face each other.
  • the first reference plate 41 is located on the lower side
  • the second reference plate 42 is located on the upper side of the first reference plate 41.
  • the second reference plate 42 can be lowered so as to approach the first reference plate 41 as shown by arrow 78 in FIG. 8 (B).
  • the second reference plate 42 can be raised so as to be separated from the first reference plate 41 as shown by arrow 79 in FIG. 8 (B).
  • the second reference plate 42 is electrically connected to the elevating instruction unit 3h included in the control unit 3, and can ascend and descend based on the instruction of the elevating instruction unit 3h.
  • the elevating operation of the second reference plate 42 in the present embodiment is performed by a drive motor (not shown), but it may be elevated by an elevating mechanism that does not use power.
  • the worm gear 100 to be measured has the first reference plate 41 and the first reference plate 41 in a state where the position of the cutting start portion 104a as a feature portion is aligned with the position of the cutting start portion 104a in the master piece. 2 Supply between the reference plate 42 and the reference plate 42.
  • the first reference surface 41a is provided with a first holding portion 43 including a pair of block-shaped members.
  • the first holding portion 43 holds the first gauge 45a and the second gauge 45b.
  • Each of the block-shaped members included in the first holding portion 43 is provided with two groove portions 43a.
  • the end of the first gauge 45a and the end of the second gauge 45b are fitted into the groove 43a.
  • the depth of the groove portion 43a is such that when the first holding portion 43 is installed on the first reference surface 41a, the first gauge 45a and the second gauge 45b are in line contact with the first reference surface 41a along the axial direction, respectively. It is said to be the depth that can be done.
  • the second reference surface 42a is provided with a second holding portion 44 including a pair of block-shaped members.
  • the second holding portion 44 holds the third gauge 45c.
  • a groove 44a is provided in each of the block-shaped members included in the second holding portion 44.
  • the end of the third gauge 45c is fitted into the groove 44a.
  • the depth of the groove 44a is such that when the second holding portion 44 is installed on the second reference surface 42a, the third gauge 45c can make line contact with the second reference surface 42a along the axial direction. ing.
  • the first reference surface 41a is one reference surface when measuring the three-needle dimension of the worm gear 100
  • the second reference surface 42a measures the three-needle dimension of the worm gear 100.
  • the other aspect of the reference when doing so.
  • the distance between the first reference surface 41a and the second reference surface 42a when the gauges 45a, 45b, and 45c are installed in the thread grooves 105 is the three-needle dimension S.
  • the second reference plate 42 is electrically connected to the three-needle dimension measurement unit 3i included in the control unit 3, and the three-needle dimension measurement unit 3i is a second reference surface 42a of the second reference plate 42.
  • the three-needle dimension S is measured based on the height position. That is, the three-needle dimension measuring unit 3i holds information on the height position of the second reference plate 42, and calculates the distance between the first reference surface 41a and the second reference surface 42a based on the information. , Let the distance be the three-needle dimension S.
  • the distance between the first reference surface 41a and the second reference surface 42a may be measured with a dial gauge or the like. good.
  • the block-shaped members included in the first holding portion 43 are fixed to the first reference surface 41a by fixing screws 43b, respectively.
  • the first holding portion 43 can be replaced by removing the fixing screw 43b.
  • the fixing screw 43b is an example of a fixing tool. In FIG. 8A, the fixing screw 43b is omitted.
  • the block-shaped members included in the second holding portion 44 are fixed to the second reference surface 42a by the fixing screws 44b, respectively.
  • the second holding portion 44 can be replaced by removing the fixing screw 44b.
  • the fixing screw 44b is an example of a fixing tool. In FIG. 8A, the fixing screw 44b is omitted.
  • the first holding portion 43 and the second holding portion 44 can be appropriately replaced according to the type of the worm gear 100.
  • the measuring device can be used.
  • the versatility of 1 can be improved.
  • the fixtures for fixing the first holding portion 43 and the second holding portion 44 are not limited to the fixing screws 43b and 44b.
  • the first holding portion 43 and the second holding portion 44 may be detachably fixed by a holding plate provided so as to be slidable.
  • the first reference plate 41 is arranged on the lower side and the second reference plate 42 is arranged on the lower side, but these may be arranged interchangeably.
  • the arrangement of these reference plates is not limited to the top and bottom. Further, these reference plates may be moved by any reference plate as long as they are relatively close to each other and can be separated from each other.
  • the first gauge 45a and the second gauge 45b are arranged in the adjacent thread grooves 105 when the threaded portion 104 of the worm gear 100 is viewed from the side surface, but the first gauge The 45a and the second gauge 45b may be arranged apart from each other.
  • the first reference surface 41a is adopted as the first reference portion and the second reference surface 42a is adopted as the second reference portion, but the first reference portion and the second reference portion have three. Other parts that correlate with the needle size may be adopted.
  • FIGS. 11 (A) and 11 (B) are explanatory views showing a schematic configuration of the discharge stage 50
  • FIG. 11 (A) is an explanatory view viewed from above
  • FIG. 11 (B) is an explanatory view viewed from the front. Is.
  • the sorting unit 51 is formed of a box-shaped member, and includes a sorting plate 51a provided so as to be swingable inside.
  • the sorting plate 51a is oscillated by the sorting plate drive motor 51b.
  • the sorting plate 51a sorts the worm gear 100, which has been measured, into either the non-defective stock section 52 or the defective stock section 53 based on the measurement result of the three-needle dimension of the worm gear 100.
  • the sorting plate drive motor 51b is electrically connected to the discharge port selection unit 3j included in the control unit 3.
  • the discharge port selection unit 3j determines whether or not the three-needle dimension obtained by the three-needle dimension measurement unit 3i is within the reference value, and changes the posture of the sorting plate 51a based on the determination result. As a result, the worm gear 100 whose measurement has been completed is sorted into either the non-defective stock section 52 or the defective stock section 53.
  • the holding table 10 goes around each stage as described above.
  • the drive motor 2a included in the index table 2 on which the holding table 10 is mounted is electrically connected to the table rotation control unit 3k included in the control unit 3, and is an index table according to the progress of the process in each stage. Rotate 2.
  • the measurement of the three-needle size can be automatically performed by operating the measuring device 1 of the embodiment.
  • gauges 45a, 45b, 45c corresponding to the specifications of the worm gear 100 to be measured are set on the three-needle dimension measurement stage 40.
  • the holding base 10 facing the closing stage 20 holds the worm gear 100 to be measured.
  • the reversing device 23 operates and the direction of the worm gear 100 is reversed.
  • the index table 2 rotates, and the holding table 10 moves to a position facing the visual inspection stage 30.
  • step S1 The measurement of the three-needle size is started at this visual inspection stage 30. That is, the extraction of the feature portion of step S1 is started.
  • step S1 the worm gear 100 held by the holding table 10 that has moved to a position facing the visual inspection stage 30 rotates. The rotation of the worm gear 100 is continuously imaged by the second camera 31. Then, based on the captured image, it is determined from the information about the shape indicating the cutting start portion 104a as the feature portion, which part in the captured image indicates the cutting start portion 104a, and the coordinates of that portion are determined. It is stored as X1 (extraction step).
  • step S2 the feature portion is arranged at a predetermined position (adjustment step). Specifically, the worm gear 100 to be measured is rotated so that the position of the cutting start portion 104a of the worm gear 100 to be measured coincides with the cutting start portion 104a of the master piece stored in advance. The rotation of the worm gear 100 is executed based on the instruction of the rotation instruction unit 3e.
  • step S3 the measurement target is supplied to the three-needle dimension measurement stage 40 for measuring the three-needle dimension.
  • the holding table 10 holding the worm gear 100 whose position of the cutting start portion 104a is adjusted moves to a position facing the three-needle dimension measuring stage 40 by rotating the index table 2. ..
  • the holding base 10 advances so that the worm gear 100 is located between the first reference plate 41 and the second reference plate 42.
  • step S4 the three-needle dimension is measured (measurement step).
  • the measurement of the three-needle size is performed in a state where the second reference plate 42 is lowered and the gauges 45a, 45b, and 45c are installed in the screw grooves 105, respectively. Then, the distance between the first reference surface 41a and the second reference surface 42a, that is, the three-needle dimension S is measured.
  • step S5 the measurement target is sorted based on the measurement result of the three-needle size.
  • the holding table 10 holding the worm gear 100 for which the measurement of the three-needle size has been completed moves to a position facing the discharge stage 50 as the index table 2 rotates.
  • the worm gear 100 is sent to the non-defective stock unit 52 shown in FIGS. 11 (A) and 11 (B).
  • the worm gear 100 is sent to the defective stock unit 53.
  • the worm gear 100 is released from the gripping state of the worm gear 100 by the gripping portion 14 when the slider 13 provided on the holding base 10 is raised, and falls into the sorting portion 51 according to the position of the sorting plate 51a. , Sorted.
  • the holding table 10 released from holding the worm gear 100 moves to a position facing the closing stage 20 again by rotating the index table 2, and receives the supply of the next worm gear 100. , Move to the process for measuring the three-needle size.
  • the measuring device 1 repeats such a process.
  • stages for executing each process are arranged around the rotating index table 2, but the form of each stage is not limited to this form.
  • the form of each stage and the flow line of the holding table 10 can be appropriately changed as needed. For example, a position where the extraction unit extracts the feature portion, a stage that functions as a measuring table, or the like may be arranged linearly, and the holding table 10 may be moved linearly.
  • a feature portion on the outer shape of the worm gear 100 is extracted, and the feature portion is adjusted so as to be arranged at a predetermined position. Then, gauges 45a, 45b, and 45c for measuring the three-needle dimension are installed in the screw groove 105 in that state, and the three-needle dimension is measured. Therefore, for many worm gears 100, it is possible to measure the three-needle size under unified conditions. As a result, the measurement accuracy of the three-needle dimension can be improved.
  • the positions where the gauges 45a, 45b, 45c are arranged are specified, when the gauges 45a, 45b, 45c are arranged, it is not necessary to adjust the positions where the gauges 45a, 45b, 45c are arranged, and the three-needle size. The labor in measurement can be reduced.
  • the accuracy of identifying the feature portion is improved, and the feature portion can be easily identified.
  • the accuracy of identifying the feature portion is improved, and the identification is facilitated.
  • the gauges 45a, 45b, 45c are similarly provided each time. Can be placed in the thread groove 105.
  • the present embodiment includes a fixture for fixing the first holding portion 43 to the first reference portion and a fixture for fixing the second holding portion 44 to the second reference portion, the first holding portion 43 and the first holding portion 43 and the second holding portion 44 are provided. 2
  • the holding portion 44 can be replaced, which is highly versatile.
  • the worm gear 100 is provided with a rotating portion that rotates around the axis AX, it is easy to adjust the characteristic portion to a predetermined position.
  • the worm gear 100 is sequentially conveyed to a position where the worm gear 100 is gripped and the extraction unit extracts a feature portion (visual inspection stage 30) and a measuring table (three-needle dimension measurement stage 40).
  • a unit holding table 10) is provided.
  • the worm gear 100 can be transported to a position where each process is executed.
  • the transport unit is provided on the rotary table (index table 2), and the position where the extraction unit extracts the characteristic portion (visual inspection stage 30) and the measuring table (three-needle dimension measurement stage 40) rotate respectively. It is placed around the table.
  • the worm gear 100 can be efficiently conveyed.
  • the feature portion may be adjusted to a predetermined position while moving to the measuring table. As a result, the process time can be shortened.
  • the loading stage 20, the visual inspection stage 30, the three-needle dimension measuring stage 40, and the discharging stage 50 are provided, but stages other than these may be provided.
  • a cleaning stage for cleaning the worm gear 100 and a measurement stage for measuring the dimensions of each part of the worm gear 100 may be arranged.
  • the feature portion is extracted based on the image captured by the second camera 31 as the imaging unit for capturing the appearance of the worm gear 100, but instead of the second camera 31, FIG. 13
  • the laser apparatus 32 as shown in the above may be adopted.
  • a conventionally known method can be adopted as long as the characteristic portion on the outer shape of the worm gear 100 can be extracted.

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Abstract

This three-stitch dimension measuring device is provided with: an extraction unit that extracts a feature part on the outer shape of a worm gear to be measured for three-stitch dimensions; an adjustment unit that adjusts the worm gear to a state where the feature part is disposed at a prescribed position; and a measurement base that is fed with the worm gear adjusted in state by the adjustment unit, that includes a gauge provided for measuring the three-stitch dimensions of the fed worm gear so as to be able to come into contact with/separate from a screw groove formed in a screw part of the worm gear, and on which the three-stitch dimensions of the worm gear are measured in a state where the gauge is disposed in the screw groove.　

Description

三針寸法測定装置及び三針寸法測定方法Three-needle dimensional measuring device and three-needle dimensional measuring method
　本発明は、三針寸法測定装置及び三針寸法測定方法に関する。 The present invention relates to a three-needle dimension measuring device and a three-needle dimension measuring method.
　歯車の相対する歯溝間寸法は、一般的にオーバーピン径を測定することで検査されており、このオーバーピン径の測定の手間を軽減することができる計測装置が知られている（例えば特許文献１参照）。 The dimension between the interdental grooves of the gears is generally inspected by measuring the overpin diameter, and a measuring device capable of reducing the trouble of measuring the overpin diameter is known (for example, a patent). Reference 1).
特開２００７－２４０４８９号公報JP-A-2007-240489
　ところで、オーバーピン径は、ねじ状の歯車であるウォーム歯車に対しても測定される場合がある。ウォーム歯車のオーバーピン径は、三本の棒状のゲージを用いて測定される三針寸法として測定される。三本のゲージのうち、二本のゲージは、ウォーム歯車の中心軸線の一方側に位置しているねじ溝内に配置され、残りの一本のゲージは、ウォーム歯車の中心軸線を挟んで反対側に位置しているねじ溝内に二本のゲージと対向させて配置される。三針寸法は、ウォーム歯車を挟んで対向配置されたゲージ間の距離を、例えば、マイクロメータで読み取ることで測定される。 By the way, the overpin diameter may also be measured for a worm gear, which is a screw-shaped gear. The overpin diameter of the worm gear is measured as a three-needle dimension measured using three rod-shaped gauges. Of the three gauges, two are located in the thread groove located on one side of the center axis of the worm gear, and the other gauge is opposite across the center axis of the worm gear. It is placed in the thread groove located on the side so as to face the two gauges. The three-needle dimension is measured by reading the distance between gauges arranged opposite to each other with the worm gear in between, for example, with a micrometer.
　このような三針寸法を大量のウォーム歯車毎に測定する場合、三本のゲージをウォーム歯車毎にねじ溝内に配置することになる。このようなゲージの配置は手間である。 When measuring such three-needle dimensions for each large number of worm gears, three gauges are arranged in the thread groove for each worm gear. Arranging such gauges is troublesome.
　また、ウォーム歯車のねじ溝は螺旋状に設けられており、測定に用いる三本のゲージを検査対象となるどのウォーム歯車に対しても同様に配置することは難しい。検査するウォーム歯車毎にゲージが配置される位置が異なっていると、測定誤差が大きくなり、大量のウォーム歯車の品質の水準を維持することが困難になると考えられる。特許文献１は、ウォーム歯車のオーバーピン径を測定することは想定しておらず、このような問題を解決するものではない。 In addition, the thread grooves of the worm gear are provided in a spiral shape, and it is difficult to arrange the three gauges used for measurement in the same manner for any worm gear to be inspected. If the position where the gauge is arranged is different for each worm gear to be inspected, the measurement error will be large and it will be difficult to maintain the quality level of a large number of worm gears. Patent Document 1 does not assume that the overpin diameter of the worm gear is measured, and does not solve such a problem.
　本発明は、上記課題に鑑みなされたものであり、ウォーム歯車における三針寸法の測定精度を向上することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to improve the measurement accuracy of the three-needle dimension in a worm gear.
　本発明の三針寸法測定装置は、三針寸法の測定対象となるウォーム歯車の外形上の特徴部分を抽出する抽出部と、前記ウォーム歯車を前記特徴部分が所定位置に配置された状態に調整する調整部と、前記調整部によって状態が調整された前記ウォーム歯車が供給されるとともに、供給された前記ウォーム歯車の三針寸法を測定するゲージが前記ウォーム歯車のねじ部に形成されたねじ溝に対して接触及び離間可能に設けられ、前記ゲージが前記ねじ溝内に配置された状態で前記ウォーム歯車の三針寸法を測定する測定台と、を備えたことを特徴とする。 The three-needle dimension measuring device of the present invention adjusts the extraction unit that extracts the characteristic portion on the outer shape of the worm gear to be measured for the three-needle dimension and the worm gear so that the characteristic portion is arranged at a predetermined position. The adjusting unit and the worm gear whose state has been adjusted by the adjusting unit are supplied, and a gauge for measuring the three-needle dimension of the supplied worm gear is formed in the threaded portion of the worm gear. It is characterized by being provided so as to be in contact with and separated from the gear, and provided with a measuring table for measuring the three-needle dimension of the worm gear in a state where the gauge is arranged in the thread groove.
　上記三針寸法測定装置において、前記抽出部は、前記ウォーム歯車の外観を撮像する撮像部を含み、前記撮像部により撮像された前記ウォーム歯車の撮像データに基づき、前記ウォーム歯車の外観検査を行う外観検査部をさらに備えた態様とすることができる。 In the three-needle dimension measuring device, the extraction unit includes an imaging unit that images the appearance of the worm gear, and performs an appearance inspection of the worm gear based on the imaging data of the worm gear imaged by the imaging unit. The mode may be further provided with a visual inspection unit.
　また、前記抽出部は、前記ねじ部の端部を特徴部分として抽出する態様とすることができる。 Further, the extraction unit can be in a mode of extracting the end portion of the screw portion as a feature portion.
　上記三針寸法測定装置において、前記測定台は、前記ゲージに含まれる第１のゲージ及び第２のゲージを保持する第１保持部と、前記ゲージに含まれる第３のゲージを保持するとともに、前記第１保持部との間に前記ウォーム歯車が供給された状態で、前記第１保持部に対して相対的に接近及び離間可能に設けられた第２保持部と、を含む態様とすることができる。 In the three-needle dimension measuring device, the measuring table holds a first holding portion for holding the first gauge and the second gauge included in the gauge, and a third gauge included in the gauge. A mode including a second holding portion provided so as to be relatively close to and separated from the first holding portion in a state where the worm gear is supplied between the first holding portion and the first holding portion. Can be done.
　上記三針寸法測定装置において、前記第１保持部を第１基準部に固定する固定具と、前記第２保持部を第２基準部に固定する固定具と、をさらに備えた態様とすることができる。 The three-needle dimension measuring device is further provided with a fixture for fixing the first holding portion to the first reference portion and a fixture for fixing the second holding portion to the second reference portion. Can be done.
　上記三針寸法測定装置において、前記調整部は、前記ウォーム歯車の端部を把持する把持部と、当該把持部によって把持した前記ウォーム歯車を軸線回りに回転させる回転部と、を備えた態様とすることができる。 In the three-needle dimension measuring device, the adjusting portion includes a grip portion that grips the end portion of the worm gear and a rotating portion that rotates the worm gear gripped by the grip portion around an axis. can do.
　上記三針寸法測定装置において、前記ウォーム歯車を把持し、少なくとも前記抽出部が前記特徴部分を抽出する位置と、前記測定台とへ、前記ウォーム歯車を順次搬送する搬送部を備えた態様としてもよい。 In the three-needle dimension measuring device, there is also a mode in which the worm gear is gripped and at least a position where the extraction unit extracts the characteristic portion and a transport unit for sequentially transporting the worm gear to the measuring table are provided. good.
　前記搬送部は、回転テーブル上に設けられ、前記抽出部が前記特徴部分を抽出する位置と、前記測定台は、それぞれ前記回転テーブルの周囲に配置されている態様とすることができる。 The transport unit may be provided on a rotary table, and the position where the extraction unit extracts the characteristic portion and the measurement table may be arranged around the rotary table, respectively.
　本発明の三針寸法測定方法は、三針寸法の測定対象となるウォーム歯車の外形上の特徴部分を抽出する抽出工程と、前記ウォーム歯車を前記特徴部分が所定位置に配置された状態に調整する調整工程と、前記調整工程において状態が調整された前記ウォーム歯車を、第１ゲージを保持する第１保持部と、第２のゲージ及び第３のゲージを保持するとともに、前記第１保持部に対して相対的に接近及び離間可能に設けられた第２保持部との間に供給する工程と、前記ウォーム歯車の三針寸法を測定する測定工程と、を含むことを特徴とする。 The three-needle dimension measurement method of the present invention includes an extraction step of extracting a feature portion on the outer shape of the worm gear to be measured for the three-needle dimension, and adjusting the worm gear to a state in which the feature portion is arranged at a predetermined position. The adjusting step and the worm gear whose state has been adjusted in the adjusting step are held by the first holding portion for holding the first gauge, the second gauge and the third gauge, and the first holding portion. It is characterized by including a step of supplying the worm gear between the second holding portion and the second holding portion provided so as to be relatively close to each other and a measuring step of measuring the three-needle dimension of the worm gear.
　本発明によれば、ウォーム歯車における三針寸法の測定精度を向上することができる。 According to the present invention, it is possible to improve the measurement accuracy of the three-needle dimension in the worm gear.
図１は実施形態の三針寸法測定装置の概略構成を模式的に示す説明図である。FIG. 1 is an explanatory diagram schematically showing a schematic configuration of a three-needle dimension measuring device according to an embodiment. 図２（Ａ）から図２（Ｃ）は測定対象となるウォーム歯車の外形を示す図面であり、図２（Ａ）は正面図、図２（Ｂ）は側面図、図２（Ｃ）は斜視図である。2 (A) to 2 (C) are drawings showing the outer shape of the worm gear to be measured, FIG. 2 (A) is a front view, FIG. 2 (B) is a side view, and FIG. 2 (C) is a side view. It is a perspective view. 図３（Ａ）から図３（Ｃ）は保持台を示す図面であり、図３（Ａ）は平面図、図３（Ｂ）は側面図、図３（Ｃ）は正面図である。3 (A) to 3 (C) are drawings showing a holding table, FIG. 3 (A) is a plan view, FIG. 3 (B) is a side view, and FIG. 3 (C) is a front view. 図４（Ａ）は把持部に含まれる第１ローラが降下する様子を示す説明図であり、図４（Ｂ）は把持部によってウォーム歯車を把持する様子を示す説明図であり、図４（Ｃ）は把持部によって把持されたウォーム歯車を回転させる様子を示す説明図である。FIG. 4 (A) is an explanatory view showing how the first roller included in the grip portion descends, and FIG. 4 (B) is an explanatory view showing how the worm gear is gripped by the grip portion. C) is an explanatory view showing how the worm gear gripped by the grip portion is rotated. 図５（Ａ）及び図５（Ｂ）は供給トレイ上にウォーム歯車が供給される様子を示す説明図であり、図５（Ａ）は上方から観た説明図、図５（Ｂ）は側方から観た説明図である。5 (A) and 5 (B) are explanatory views showing how the worm gear is supplied onto the supply tray, FIG. 5 (A) is an explanatory view viewed from above, and FIG. 5 (B) is a side view. It is an explanatory diagram seen from the side. 図６は第２カメラによってウォーム歯車の外形を撮像するためにウォーム歯車を回転させ、また、ウォーム歯車の特徴部分を所定位置に配置するためにウォーム歯車を回転させている様子を示す説明図である。FIG. 6 is an explanatory view showing how the worm gear is rotated by the second camera to image the outer shape of the worm gear, and the worm gear is rotated to arrange the characteristic portion of the worm gear at a predetermined position. be. 図７（Ａ）はウォーム歯車が回転する様子を示す説明図であり、図７（Ｂ）は、回転しているウォーム歯車を撮像することによって得られる画像の一例である。FIG. 7A is an explanatory view showing how the worm gear rotates, and FIG. 7B is an example of an image obtained by imaging the rotating worm gear. 図８（Ａ）及び図８（Ｂ）は三針寸法を測定するためにウォーム歯車のねじ部にゲージを配置した様子を示す説明図であり、図８（Ａ）は上方から観た様子を模式的に示す説明図であり、図８（Ｂ）は正面から観た様子を示す説明図である。8 (A) and 8 (B) are explanatory views showing a state in which a gauge is arranged on the threaded portion of the worm gear in order to measure the three-needle dimension, and FIG. 8 (A) shows a state viewed from above. It is explanatory drawing which shows typically, and FIG. 8B is an explanatory view which shows the state which it saw from the front. 図９は三針寸法を測定するためにウォーム歯車のねじ溝にゲージを配置した様子を模式的に示す斜視図である。FIG. 9 is a perspective view schematically showing a state in which a gauge is arranged in the thread groove of the worm gear in order to measure the three-needle dimension. 図１０は三針寸法を模式的に示す説明図である。FIG. 10 is an explanatory view schematically showing the three-needle dimension. 図１１（Ａ）及び図１１（Ｂ）は排出ステージの概略構成を示す説明図であり、図１１（Ａ）は上方から観た説明図であり、図１１（Ｂ）は正面から観た説明図である。11 (A) and 11 (B) are explanatory views showing a schematic configuration of a discharge stage, FIG. 11 (A) is an explanatory view viewed from above, and FIG. 11 (B) is an explanatory view viewed from the front. It is a figure. 図１２は三針寸法の測定方法を示すフローチャートの一例である。FIG. 12 is an example of a flowchart showing a method of measuring the three-needle dimension. 図１３はウォーム歯車における特徴部分を特定する他の例について模式的に示す説明図である。FIG. 13 is an explanatory diagram schematically showing another example of specifying a characteristic portion in the worm gear.
　まず、図１を参照して、実施形態の三針寸法測定装置（以下、単に「測定装置」という）１について、その概略構成を説明する。図１は実施形態の測定装置１の概略構成を模式的に示す説明図である。 First, with reference to FIG. 1, the schematic configuration of the three-needle dimension measuring device (hereinafter, simply referred to as “measuring device”) 1 of the embodiment will be described. FIG. 1 is an explanatory diagram schematically showing a schematic configuration of the measuring device 1 of the embodiment.
　測定装置１は、ウォーム歯車１００の三針寸法を測定する。測定装置１は、駆動モータ２ａによって回転可能に設けられた回転テーブルであるインデックステーブル２を備えている。インデックステーブル２の周囲には、ウォーム歯車１００を供給する投入ステージ２０、ウォーム歯車１００の外形を撮像する外観検査ステージ３０、三針寸法を測定する測定台としての三針寸法測定ステージ４０、排出ステージ５０が配置されている。投入ステージ２０、外観検査ステージ３０、三針寸法測定ステージ４０及び排出ステージ５０は、９０°ずつ隔てて配置されている。 The measuring device 1 measures the three-needle dimension of the worm gear 100. The measuring device 1 includes an index table 2 which is a rotary table rotatably provided by the drive motor 2a. Around the index table 2, a charging stage 20 for supplying the worm gear 100, an appearance inspection stage 30 for imaging the outer shape of the worm gear 100, a three-needle dimension measuring stage 40 as a measuring table for measuring the three-needle dimension, and a discharging stage 50 are arranged. The loading stage 20, the visual inspection stage 30, the three-needle dimension measuring stage 40, and the discharging stage 50 are arranged at intervals of 90 °.
　インデックステーブル２には、それぞれウォーム歯車１００を保持する４台の保持台１０が９０°ずつ隔てられて配置されている。４台の保持台１０は、インデックステーブル２が回転することで、投入ステージ２０から排出ステージ５０までを巡回する。各保持台１０は、矢示１５で示すように、インデックステーブル２の半径方向に沿って、前後進することができる。 On the index table 2, four holding tables 10 for holding the worm gear 100 are arranged at intervals of 90 °. The four holding tables 10 circulate from the input stage 20 to the discharge stage 50 by rotating the index table 2. As shown by arrow 15, each holding table 10 can move forward and backward along the radial direction of the index table 2.
　ここで、図２（Ａ）から図２（Ｃ）を参照して、測定対象となるウォーム歯車１００について説明する。図２（Ａ）から図２（Ｃ）は測定対象となるウォーム歯車１００の外形を示す図面であり、図２（Ａ）は正面図、図２（Ｂ）は側面図、図２（Ｃ）は斜視図である。なお、図２（Ａ）及び図２（Ｂ）では、ねじ部１０４の具体的な形状は省略されている。 Here, the worm gear 100 to be measured will be described with reference to FIGS. 2 (A) to 2 (C). 2 (A) to 2 (C) are drawings showing the outer shape of the worm gear 100 to be measured, FIG. 2 (A) is a front view, FIG. 2 (B) is a side view, and FIG. 2 (C). Is a perspective view. In addition, in FIG. 2A and FIG. 2B, the specific shape of the screw portion 104 is omitted.
　ウォーム歯車１００は、第１端部１０１と第２端部１０２を備えている。ウォーム歯車１００は、第１端部１０１側に面取部１０３を備え、第２端部１０２側にねじ部１０４を備えている。ねじ部１０４には、螺旋状に連続するねじ溝１０５が設けられている。面取部１０３は、１８０°隔てて２個所に設けられている。ねじ部１０４は、第１端部１０１側がその切り始め部１０４ａであり、第２端部１０２側がその切り終り部１０４ｂとされている。 The worm gear 100 includes a first end portion 101 and a second end portion 102. The worm gear 100 includes a chamfered portion 103 on the first end 101 side and a threaded portion 104 on the second end 102 side. The threaded portion 104 is provided with a spirally continuous threaded groove 105. The chamfered portions 103 are provided at two locations separated by 180 °. The threaded portion 104 has a first end 101 side as its cutting start portion 104a and a second end 102 side as its cutting end portion 104b.
　再び、図１を参照すると、保持台１０は、ウォーム歯車１００の第１端部１０１側を把持して、各ステージを巡回する。 With reference to FIG. 1 again, the holding base 10 grips the first end 101 side of the worm gear 100 and patrols each stage.
　測定装置１は、制御部３を備えている。制御部３は、ＣＰＵ（Central Processing Unit）、ＲＯＭ（Read Only Memory）、ＲＡＭ（Random Access Memory）、記憶部（例えば、ＨＤＤ（Hard Disk Drive））、入出力インターフェイス、及び可搬型記憶媒体用ドライブ等を備えている。制御部３のこれらの構成各部は、バスに接続されている。制御部３では、ＲＯＭあるいはＨＤＤに格納されているプログラム、或いは可搬型記憶媒体用ドライブが可搬型記憶媒体から読み取ったプログラムをＣＰＵが実行し、制御部３の機能の一部が実現される。 The measuring device 1 includes a control unit 3. The control unit 3 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a storage unit (for example, an HDD (Hard Disk Drive)), an input / output interface, and a drive for a portable storage medium. Etc. are provided. Each of these components of the control unit 3 is connected to a bus. In the control unit 3, the CPU executes a program stored in the ROM or HDD, or a program read from the portable storage medium by the drive for the portable storage medium, and a part of the functions of the control unit 3 is realized.
　制御部３には、方向判定部３ａ、反転指示部３ｂ、前後進指示部３ｃ、把持指示部３ｄ、回転指示部３ｅ、切り始め部抽出部３ｆ、外観検査部３ｇ、昇降指示部３ｈ、三針寸法測定部３ｉ、排出口選定部３ｊ及びテーブル回転制御部３ｋを含む。これらの各機能部は、測定装置１の各部にそれぞれ接続されている。これらの各機能部の接続先については、後に説明する。 The control unit 3 includes a direction determination unit 3a, a reversal instruction unit 3b, a forward / backward movement instruction unit 3c, a grip instruction unit 3d, a rotation instruction unit 3e, a cutting start unit extraction unit 3f, an appearance inspection unit 3g, an elevating instruction unit 3h, and three. Includes needle dimension measurement unit 3i, discharge port selection unit 3j, and table rotation control unit 3k. Each of these functional units is connected to each unit of the measuring device 1. The connection destinations of each of these functional units will be described later.
　つぎに、図３（Ａ）から図３（Ｃ）及び図４（Ａ）から図４（Ｃ）を図１とともに参照しつつ、保持台１０について説明する。図３（Ａ）から図３（Ｃ）は保持台１０を示す図面であり、図３（Ａ）は平面図、図３（Ｂ）は側面図、図３（Ｃ）は正面図である。図４（Ａ）は把持部１４に含まれる第１ローラ１４ａが降下する様子を示す説明図であり、図４（Ｂ）は把持部１４によってウォーム歯車１００を把持する様子を示す説明図である。図４（Ｃ）は把持部１４によって把持されたウォーム歯車１００を回転させる様子を示す説明図である。 Next, the holding table 10 will be described with reference to FIGS. 3 (A) to 3 (C) and FIGS. 4 (A) to 4 (C) together with FIG. 3 (A) to 3 (C) are drawings showing the holding table 10, FIG. 3 (A) is a plan view, FIG. 3 (B) is a side view, and FIG. 3 (C) is a front view. FIG. 4A is an explanatory view showing how the first roller 14a included in the grip portion 14 descends, and FIG. 4B is an explanatory diagram showing how the grip portion 14 grips the worm gear 100. .. FIG. 4C is an explanatory view showing how the worm gear 100 gripped by the grip portion 14 is rotated.
　保持台１０は、搬送部として機能するものであり、インデックステーブル２上に４つ配置されている。各保持台１０は、同一物である。保持台１０は、本体部１１、昇降柱１２、スライダ１３及び把持部１４を備えている。 The holding table 10 functions as a transport unit, and four holding tables 10 are arranged on the index table 2. Each holding table 10 is the same. The holding base 10 includes a main body portion 11, an elevating column 12, a slider 13, and a grip portion 14.
　本体部１１は、図１において矢示１５で示すように、インデックステーブル２上で前後進できるように設けられている。本体部１１は、制御部３に含まれている前後進指示部３ｃと電気的に接続されており、前後進指示部３ｃの指示に基づいて、各ステージにおいて実行される工程に適した位置に移動することができる。 The main body 11 is provided so as to be able to move forward and backward on the index table 2 as shown by arrow 15 in FIG. The main body 11 is electrically connected to the forward / backward instruction unit 3c included in the control unit 3, and is positioned at a position suitable for the process executed in each stage based on the instruction of the forward / backward instruction unit 3c. You can move.
　昇降柱１２は、保持台１０がインデックステーブル２に搭載された状態で、インデックステーブル２の外周側に位置するように、すなわち、各ステージと対向できるように本体部１１に設けられている。昇降柱１２には、スライダ１３が昇降柱１２の上下方向に沿ってスライド可能に設けられている。 The elevating column 12 is provided on the main body 11 so that the holding table 10 is mounted on the index table 2 and is located on the outer peripheral side of the index table 2, that is, so as to face each stage. A slider 13 is provided on the elevating column 12 so as to be slidable along the vertical direction of the elevating column 12.
　把持部１４は、第１ローラ１４ａ、第２ローラ１４ｂ及び第３ローラ１４ｃを含んでいる。第１ローラ１４ａは、スライダ１３に設けられている。第２ローラ１４ｂと第３ローラ１４ｃは、本体部１１に設けられている。第２ローラ１４ｂと第３ローラ１４ｃとは、それぞれの外周面が接するように並列させて設けられている。第２ローラ１４ｂは、回転部に相当し、不図示のモータによって回転駆動されるようになっている。第２ローラ１４ｂが回転することで、ウォーム歯車１００が軸線ＡＸ回りに回転する。第２ローラ１４ｂを駆動するモータには、制御部３に含まれている回転指示部３ｅが電気的に接続されている。 The grip portion 14 includes a first roller 14a, a second roller 14b, and a third roller 14c. The first roller 14a is provided on the slider 13. The second roller 14b and the third roller 14c are provided on the main body 11. The second roller 14b and the third roller 14c are provided in parallel so that their outer peripheral surfaces are in contact with each other. The second roller 14b corresponds to a rotating portion and is rotationally driven by a motor (not shown). As the second roller 14b rotates, the worm gear 100 rotates around the axis AX. A rotation instruction unit 3e included in the control unit 3 is electrically connected to the motor that drives the second roller 14b.
　なお、本実施形態では、第２ローラ１４ｂを回転駆動しているが、回転駆動されるのは、第１ローラ１４ａであってもよいし、第３ローラ１４ｃであってもよい。また、複数のローラを回転駆動の対象としてもよい。要は、把持部１４で把持したウォーム歯車１００を回転させることができるようになっていればよい。 In the present embodiment, the second roller 14b is rotationally driven, but the first roller 14a or the third roller 14c may be rotationally driven. Further, a plurality of rollers may be subject to rotational drive. In short, it suffices if the worm gear 100 gripped by the grip portion 14 can be rotated.
　スライダ１３には、制御部３に含まれている把持指示部３ｄが電気的に接続されている。ウォーム歯車１００が第１ローラ１４ａから第３ローラ１４ｃの間に供給された状態で、把持指示部３ｄの指示に基づいて、図４（Ａ）に示すように、スライダ１３が降下すると、図４（Ｂ）に示すように、ウォーム歯車１００が把持される。そして、回転指示部３ｅの指示に基づいて第２ローラ１４ｂが矢示７１のように回転すると、ウォーム歯車１００が矢示７２のように回転する。 A gripping instruction unit 3d included in the control unit 3 is electrically connected to the slider 13. In a state where the worm gear 100 is supplied between the first roller 14a and the third roller 14c, when the slider 13 is lowered as shown in FIG. 4A based on the instruction of the gripping instruction unit 3d, FIG. As shown in (B), the worm gear 100 is gripped. Then, when the second roller 14b rotates as shown by the arrow 71 based on the instruction of the rotation indicating unit 3e, the worm gear 100 rotates as shown by the arrow 72.
　つぎに、図５（Ａ）及び図５（Ｂ）を参照しつつ、投入ステージ２０について説明する。図５（Ａ）及び図５（Ｂ）は供給トレイ２２上にウォーム歯車１００が供給される様子を示す説明図であり、図５（Ａ）は上方から観た説明図、図５（Ｂ）は側方から観た説明図である。 Next, the input stage 20 will be described with reference to FIGS. 5 (A) and 5 (B). 5 (A) and 5 (B) are explanatory views showing how the worm gear 100 is supplied onto the supply tray 22, and FIG. 5 (A) is an explanatory view viewed from above, FIG. 5 (B). Is an explanatory diagram seen from the side.
　投入ステージ２０は、フィーダ２１、供給トレイ２２、反転器２３及び第１カメラ２４を備えている。 The loading stage 20 includes a feeder 21, a supply tray 22, a reversing device 23, and a first camera 24.
　フィーダ２１は、樋状の部材である。フィーダ２１は、製造されたウォーム歯車１００がストックされている不図示の製品ホッパーからウォーム歯車１００を矢示７３のように順次インデックステーブル２に向かって投入する。 The feeder 21 is a gutter-shaped member. The feeder 21 sequentially feeds the worm gear 100 toward the index table 2 as shown by arrow 73 from a product hopper (not shown) in which the manufactured worm gear 100 is stocked.
　供給トレイ２２は、フィーダ２１の下流側端部と対向させて設けられている。供給トレイ２２の下流側端部には、壁状のストッパ２２ａが設けられている。フィーダ２１上を流下してきたウォーム歯車１００は、ストッパ２２ａに当接した状態で供給トレイ２２上に留まる。 The supply tray 22 is provided so as to face the downstream end of the feeder 21. A wall-shaped stopper 22a is provided at the downstream end of the supply tray 22. The worm gear 100 that has flowed down on the feeder 21 stays on the supply tray 22 in a state of being in contact with the stopper 22a.
　反転器２３は、供給トレイ２２上のウォーム歯車１００の向きが所定の方向と異なっている場合、すなわち、第１端部１０１が保持台１０と対向する方向と異なっている場合に、その向きを反転させ、所定の向きとする。供給トレイ２２上のウォーム歯車１００が所定の方向となっているか否かは、第１カメラ２４に撮像された画像に基づいて、制御部３に含まれている方向判定部３ａによって判定される。反転器２３は、対向配置されるとともに、矢示７４のように開閉可能に設けられた一対の爪部を備える。また、反転器２３は、矢示７６で示すように昇降可能に設けられている。反転器２３は、制御部３に含まれている反転指示部３ｂの指示に基づいて矢示７５のように回転し、ウォーム歯車１００の向きを反転させることができる。 The reversing device 23 sets the direction of the worm gear 100 on the supply tray 22 when the direction is different from the predetermined direction, that is, when the first end 101 is different from the direction facing the holding base 10. Invert it to the desired orientation. Whether or not the worm gear 100 on the supply tray 22 is in a predetermined direction is determined by the direction determination unit 3a included in the control unit 3 based on the image captured by the first camera 24. The reversing device 23 is arranged so as to face each other, and includes a pair of claws that can be opened and closed as shown by arrow 74. Further, the reversing device 23 is provided so as to be able to move up and down as shown by arrow 76. The reversing device 23 can rotate as shown by arrow 75 based on the instruction of the reversing instruction unit 3b included in the control unit 3 to reverse the direction of the worm gear 100.
　なお、供給トレイ２２上のウォーム歯車１００を保持台１０へ受け渡すときには、反転器２３によってウォーム歯車１００を挟持し、持ち上げた状態とする。このため、仮に、供給トレイ２２上へ投入されたウォーム歯車１００の向きが所定の向きである場合であっても、反転器２３は、供給トレイ２２上のウォーム歯車１００を挟持し、持ち上げる。 When the worm gear 100 on the supply tray 22 is delivered to the holding base 10, the worm gear 100 is sandwiched by the reversing device 23 and lifted. Therefore, even if the direction of the worm gear 100 thrown onto the supply tray 22 is a predetermined direction, the reversing device 23 sandwiches and lifts the worm gear 100 on the supply tray 22.
　つぎに、図６、図７（Ａ）及び図７（Ｂ）を参照して、外観検査ステージ３０について説明する。図６は第２カメラ３１によってウォーム歯車１００の外形を撮像するためにウォーム歯車１００を回転させ、また、ウォーム歯車１００の特徴部分を所定位置に配置するためにウォーム歯車１００を回転させている様子を示す説明図である。図７（Ａ）はウォーム歯車１００が回転する様子を示す説明図であり、図７（Ｂ）は、回転しているウォーム歯車１００を撮像することによって得られる画像の一例である。 Next, the visual inspection stage 30 will be described with reference to FIGS. 6, 7 (A) and 7 (B). FIG. 6 shows a state in which the worm gear 100 is rotated by the second camera 31 to image the outer shape of the worm gear 100, and the worm gear 100 is rotated to arrange the characteristic portion of the worm gear 100 at a predetermined position. It is explanatory drawing which shows. FIG. 7A is an explanatory view showing how the worm gear 100 rotates, and FIG. 7B is an example of an image obtained by imaging the rotating worm gear 100.
　外観検査ステージ３０は、ウォーム歯車１００の外観を撮像する撮像部としての第２カメラ３１と、第２カメラ３１により撮像されたウォーム歯車１００の撮像データに基づき、ウォーム歯車１００の外観検査を行う外観検査部３ｇを備えている。第２カメラ３１によって撮像された画像は、外観検査部３ｇによるウォーム歯車１００の外観の検査に用いられる他、ウォーム歯車１００の外形上の特徴を抽出するために用いられる。第２カメラ３１は、回転部としての第２ローラ１４ｂを回転させ、把持部１４に把持されているウォーム歯車１００を矢示７７のように回転させながら、その外観を連続的に撮像する。外観の検査は、外観検査部３ｇによって行われ、撮像された画像に基づいて、ウォーム歯車１００のねじ部１０４に傷や欠けがないか、また、異物が付着していないか等が検査される。 The appearance inspection stage 30 performs an appearance inspection of the worm gear 100 based on the imaging data of the second camera 31 as an imaging unit that images the appearance of the worm gear 100 and the worm gear 100 imaged by the second camera 31. It is equipped with an inspection unit of 3 g. The image captured by the second camera 31 is used for inspecting the appearance of the worm gear 100 by the appearance inspection unit 3g, and is also used for extracting the external features of the worm gear 100. The second camera 31 rotates the second roller 14b as a rotating portion, rotates the worm gear 100 gripped by the grip portion 14 as shown by arrow 77, and continuously images the appearance thereof. The appearance inspection is performed by the appearance inspection unit 3g, and based on the captured image, the screw portion 104 of the worm gear 100 is inspected for scratches or chips, and for foreign matter. ..
　本実施形態では、ウォーム歯車１００の外形上の特徴部分として、ねじ部１０４の切り始め部１０４ａを採用する。このため、第２カメラ３１は、制御部３に含まれている切り始め部抽出部３ｆとともに、ウォーム歯車１００の外形上の特徴部分を抽出する抽出部として機能する。このように本実施形態では、第２カメラ３１により撮像された撮像データに基づいてウォーム歯車１００の外観検査と特徴部分の抽出を行うので、効率よく検査を行うことができる。 In the present embodiment, the cutting start portion 104a of the screw portion 104 is adopted as a characteristic portion on the outer shape of the worm gear 100. Therefore, the second camera 31 functions as an extraction unit for extracting the characteristic portion on the outer shape of the worm gear 100 together with the cutting start portion extraction unit 3f included in the control unit 3. As described above, in the present embodiment, the appearance inspection and the extraction of the characteristic portion of the worm gear 100 are performed based on the image pickup data captured by the second camera 31, so that the inspection can be performed efficiently.
　図７（Ｂ）には、ウォーム歯車１００を２．５周させたときの撮像画像が示されている。図７（Ｂ）に示した撮像画像では、切り始め部１０４ａの形状を示す特徴部分１０４ａ１が２回表れている。切り始め部抽出部３ｆは、予め記憶している切り始め部１０４ａを示す形状に関する情報から、撮像画像中のどの部分が切り始め部１０４ａを示しているのかを判定し、その箇所の座標をＸ１として記憶しておく。 FIG. 7B shows a captured image when the worm gear 100 is rotated 2.5 times. In the captured image shown in FIG. 7B, the feature portion 104a1 showing the shape of the cutting start portion 104a appears twice. The cutting start portion extraction unit 3f determines which part in the captured image indicates the cutting start portion 104a from the information regarding the shape indicating the cutting start portion 104a stored in advance, and sets the coordinates of that portion to X1. Remember as.
　第２ローラ１４ｂと電気的に接続されている回転指示部３ｅは、ウォーム歯車１００を、その特徴部分である切り始め部１０４ａが所定位置に配置された状態に調整する調整部としても機能する。ここで、所定位置とは、マスターピースとして指定したウォーム歯車１００を撮像した画像において切り始め部１０４ａの形状を示す特徴部分１０４ａ１を示した座標Ｘ０である。マスターピースは、三針寸法を測定するときに、後に説明する第１のゲージ４５ａ、第２のゲージ４５ｂ及び第３のゲージ４５ｃ（図８（Ａ）等参照）を当接させる位置の基準を示すために選定されたウォーム歯車１００である。 The rotation indicating unit 3e electrically connected to the second roller 14b also functions as an adjusting unit that adjusts the worm gear 100 so that the cutting start portion 104a, which is a characteristic portion thereof, is arranged at a predetermined position. Here, the predetermined position is the coordinate X0 showing the feature portion 104a1 showing the shape of the cutting start portion 104a in the image of the worm gear 100 designated as the master piece. The master piece indicates a reference of a position where the first gauge 45a, the second gauge 45b, and the third gauge 45c (see FIG. 8A and the like), which will be described later, are brought into contact with each other when measuring the three-needle dimension. The worm gear 100 selected for this purpose.
　回転指示部３ｅは、測定対象のウォーム歯車１００の切り始め部１０４ａを示す座標Ｘ１と、マスターピースとして指定したウォーム歯車１００の切り始め部１０４ａを示す座標Ｘ０とから、測定対象のウォーム歯車１００の回転角度を算出する。すなわち、測定対象のウォーム歯車１００の切り始め部１０４ａの位置が、マスターピースとして指定したウォーム歯車１００の切り始め部１０４ａと一致するように回転角度を算出する。回転指示部３ｅは、把持部１４によって把持しているウォーム歯車１００を算出した回転角度分だけ回転させるように、第２ローラ１４ｂを回転させる。 The rotation instruction unit 3e rotates the worm gear 100 to be measured from the coordinates X1 indicating the cutting start portion 104a of the worm gear 100 to be measured and the coordinates X0 indicating the cutting start portion 104a of the worm gear 100 designated as the master piece. Calculate the angle. That is, the rotation angle is calculated so that the position of the cutting start portion 104a of the worm gear 100 to be measured coincides with the cutting start portion 104a of the worm gear 100 designated as the master piece. The rotation instruction unit 3e rotates the second roller 14b so that the worm gear 100 gripped by the grip unit 14 is rotated by the calculated rotation angle.
　このように測定対象のウォーム歯車１００の状態を調整しておくことで、以下に説明する三針寸法測定ステージ４０において、同じ基準でねじ溝１０５内に第１のゲージ４５ａ、第２のゲージ４５ｂ及び第３のゲージ４５ｃを配置することができるようになる。 By adjusting the state of the worm gear 100 to be measured in this way, in the three-needle dimension measurement stage 40 described below, the first gauge 45a and the second gauge 45b are contained in the thread groove 105 with the same reference. And a third gauge 45c can be placed.
　なお、本実施形態では、特徴部分として切り始め部１０４ａを選定したが、特徴部分は、これに限定されるものではなく、例えば、切り終り部１０４ｂを特徴部分に選定してもよい。また、他に外形において特徴部分として特定できる箇所がある場合には、その箇所を特徴部分に選定してもよい。 In the present embodiment, the cutting start portion 104a is selected as the feature portion, but the feature portion is not limited to this, and for example, the cutting end portion 104b may be selected as the feature portion. If there is another part that can be specified as a feature part in the outer shape, that part may be selected as the feature part.
　つぎに、図８（Ａ）、図８（Ｂ）、図９及び図１０を参照して三針寸法測定ステージ４０について説明する。図８（Ａ）及び図８（Ｂ）は三針寸法を測定するためにウォーム歯車１００のねじ部１０４にゲージ４５ａ，４５ｂ，４５ｃを配置した様子を示す説明図であり、図８（Ａ）は上方から観た様子を模式的に示す説明図であり、図８（Ｂ）は正面から見た様子を示す説明図である。図９は三針寸法を測定するためにウォーム歯車１００のねじ溝１０５にゲージ４５ａ，４５ｂ，４５ｃを配置した様子を模式的に示す斜視図である。図１０は三針寸法を模式的に示す説明図である。 Next, the three-needle dimension measurement stage 40 will be described with reference to FIGS. 8 (A), 8 (B), 9 and 10. 8 (A) and 8 (B) are explanatory views showing a state in which gauges 45a, 45b, and 45c are arranged on the threaded portion 104 of the worm gear 100 in order to measure the three-needle dimension, and FIG. 8 (A) shows. Is an explanatory view schematically showing a state viewed from above, and FIG. 8B is an explanatory view showing a state viewed from the front. FIG. 9 is a perspective view schematically showing how the gauges 45a, 45b, and 45c are arranged in the thread groove 105 of the worm gear 100 in order to measure the three-needle dimension. FIG. 10 is an explanatory view schematically showing the three-needle dimension.
　三針寸法測定ステージ４０は、第１基準板４１と第２基準板４２とを備えている。第１基準板４１は、第１基準部としての第１基準面４１ａを備えている。第２基準板４２は、第２基準部としての第２基準面４２ａを備えている。第１基準板４１と第２基準板４２とは、第１基準面４１ａと第２基準面４２ａとが対向配置されるように設けられている。本実施形態では、第１基準板４１が下側に位置し、第２基準板４２が第１基準板４１の上側に位置している。第２基準板４２は、図８（Ｂ）において矢示７８で示すように、第１基準板４１に近づくように降下することができる。また、第２基準板４２は、図８（Ｂ）において矢示７９で示すように、第１基準板４１から離れるように上昇することができる。第２基準板４２は、制御部３に含まれている昇降指示部３ｈと電気的に接続されており、昇降指示部３ｈの指示に基づいて上昇及び降下することができる。 The three-needle dimension measurement stage 40 includes a first reference plate 41 and a second reference plate 42. The first reference plate 41 includes a first reference surface 41a as a first reference portion. The second reference plate 42 includes a second reference surface 42a as a second reference portion. The first reference plate 41 and the second reference plate 42 are provided so that the first reference surface 41a and the second reference surface 42a are arranged so as to face each other. In the present embodiment, the first reference plate 41 is located on the lower side, and the second reference plate 42 is located on the upper side of the first reference plate 41. The second reference plate 42 can be lowered so as to approach the first reference plate 41 as shown by arrow 78 in FIG. 8 (B). Further, the second reference plate 42 can be raised so as to be separated from the first reference plate 41 as shown by arrow 79 in FIG. 8 (B). The second reference plate 42 is electrically connected to the elevating instruction unit 3h included in the control unit 3, and can ascend and descend based on the instruction of the elevating instruction unit 3h.
　本実施形態における第２基準板４２の昇降動作は、図示しない駆動モータによって行われるが、動力を用いることのない昇降機構によって昇降させてもよい。このような形態の場合であっても、測定対象のウォーム歯車１００は、特徴部分としての切り始め部１０４ａの位置をマスターピースにおける切り始め部１０４ａの位置に合わせた状態で第１基準板４１と第２基準板４２との間に供給する。 The elevating operation of the second reference plate 42 in the present embodiment is performed by a drive motor (not shown), but it may be elevated by an elevating mechanism that does not use power. Even in such a form, the worm gear 100 to be measured has the first reference plate 41 and the first reference plate 41 in a state where the position of the cutting start portion 104a as a feature portion is aligned with the position of the cutting start portion 104a in the master piece. 2 Supply between the reference plate 42 and the reference plate 42.
　第１基準面４１ａには、一対のブロック状の部材を含む第１保持部４３が設けられている。第１保持部４３は、第１のゲージ４５ａと第２のゲージ４５ｂを保持している。第１保持部４３に含まれるブロック状の部材には、それぞれ２個所ずつ溝部４３ａが設けられている。溝部４３ａには、第１のゲージ４５ａの端部、第２のゲージ４５ｂの端部が嵌め込まれる。溝部４３ａの深さは、第１保持部４３を第１基準面４１ａに設置したときに、第１のゲージ４５ａと第２のゲージ４５ｂがそれぞれ第１基準面４１ａに軸方向に沿って線接触することができる深さとされている。 The first reference surface 41a is provided with a first holding portion 43 including a pair of block-shaped members. The first holding portion 43 holds the first gauge 45a and the second gauge 45b. Each of the block-shaped members included in the first holding portion 43 is provided with two groove portions 43a. The end of the first gauge 45a and the end of the second gauge 45b are fitted into the groove 43a. The depth of the groove portion 43a is such that when the first holding portion 43 is installed on the first reference surface 41a, the first gauge 45a and the second gauge 45b are in line contact with the first reference surface 41a along the axial direction, respectively. It is said to be the depth that can be done.
　第２基準面４２ａには、一対のブロック状の部材を含む第２保持部４４が設けられている。第２保持部４４は、第３のゲージ４５ｃを保持している。第２保持部４４に含まれるブロック状の部材には、それぞれ溝部４４ａが設けられている。溝部４４ａには、第３のゲージ４５ｃの端部が嵌め込まれる。溝部４４ａの深さは、第２保持部４４を第２基準面４２ａに設置したときに、第３のゲージ４５ｃが第２基準面４２ａに軸方向に沿って線接触することができる深さとされている。 The second reference surface 42a is provided with a second holding portion 44 including a pair of block-shaped members. The second holding portion 44 holds the third gauge 45c. A groove 44a is provided in each of the block-shaped members included in the second holding portion 44. The end of the third gauge 45c is fitted into the groove 44a. The depth of the groove 44a is such that when the second holding portion 44 is installed on the second reference surface 42a, the third gauge 45c can make line contact with the second reference surface 42a along the axial direction. ing.
　図１０に示すように、第１基準面４１ａは、ウォーム歯車１００の三針寸法を測定するときの一方の基準の面であり、第２基準面４２ａは、ウォーム歯車１００の三針寸法を測定するときの他方の基準の面である。ゲージ４５ａ，４５ｂ，４５ｃをそれぞれねじ溝１０５内に設置した状態における第１基準面４１ａと第２基準面４２ａとの間隔が三針寸法Ｓとなる。 As shown in FIG. 10, the first reference surface 41a is one reference surface when measuring the three-needle dimension of the worm gear 100, and the second reference surface 42a measures the three-needle dimension of the worm gear 100. The other aspect of the reference when doing so. The distance between the first reference surface 41a and the second reference surface 42a when the gauges 45a, 45b, and 45c are installed in the thread grooves 105 is the three-needle dimension S.
　第２基準板４２は、制御部３に含まれている三針寸法測定部３ｉと電気的に接続されており、三針寸法測定部３ｉは、第２基準板４２の第２基準面４２ａの高さ位置に基づいて、三針寸法Ｓを測定する。すなわち、三針寸法測定部３ｉは、第２基準板４２の高さ位置に関する情報を保有しており、その情報に基づいて、第１基準面４１ａと第２基準面４２ａとの距離を算出し、その距離を三針寸法Ｓとする。 The second reference plate 42 is electrically connected to the three-needle dimension measurement unit 3i included in the control unit 3, and the three-needle dimension measurement unit 3i is a second reference surface 42a of the second reference plate 42. The three-needle dimension S is measured based on the height position. That is, the three-needle dimension measuring unit 3i holds information on the height position of the second reference plate 42, and calculates the distance between the first reference surface 41a and the second reference surface 42a based on the information. , Let the distance be the three-needle dimension S.
　また、第２基準板４２を、動力を用いることなく昇降させる形態とした場合には、第１基準面４１ａと第２基準面４２ａとの間の距離をダイヤルゲージ等で測定するようにしてもよい。 Further, when the second reference plate 42 is moved up and down without using power, the distance between the first reference surface 41a and the second reference surface 42a may be measured with a dial gauge or the like. good.
　第２基準板４２の昇降方法に拘わらず、特徴部分としての切り始め部１０４ａの位置をマスターピースにおける切り始め部１０４ａの位置に合わせておくことで、三針寸法の測定箇所を統一することができる。この結果、三針寸法の測定精度を向上させることができる。 Regardless of the method of raising and lowering the second reference plate 42, by aligning the position of the cutting start portion 104a as a feature portion with the position of the cutting start portion 104a in the master piece, it is possible to unify the measurement points of the three-needle size. .. As a result, the measurement accuracy of the three-needle dimension can be improved.
　第１保持部４３に含まれるブロック状の部材は、それぞれ固定ねじ４３ｂによって第１基準面４１ａに固定されている。第１保持部４３は、固定ねじ４３ｂを取り外すことで、交換することができる。固定ねじ４３ｂは、固定具の一例である。なお、図８（Ａ）では、固定ねじ４３ｂは、省略されている。 The block-shaped members included in the first holding portion 43 are fixed to the first reference surface 41a by fixing screws 43b, respectively. The first holding portion 43 can be replaced by removing the fixing screw 43b. The fixing screw 43b is an example of a fixing tool. In FIG. 8A, the fixing screw 43b is omitted.
　同様に、第２保持部４４に含まれるブロック状の部材は、それぞれ固定ねじ４４ｂによって第２基準面４２ａに固定されている。第２保持部４４は、固定ねじ４４ｂを取り外すことで、交換することができる。固定ねじ４４ｂは、固定具の一例である。なお、図８（Ａ）では、固定ねじ４４ｂは、省略されている。 Similarly, the block-shaped members included in the second holding portion 44 are fixed to the second reference surface 42a by the fixing screws 44b, respectively. The second holding portion 44 can be replaced by removing the fixing screw 44b. The fixing screw 44b is an example of a fixing tool. In FIG. 8A, the fixing screw 44b is omitted.
　第１保持部４３及び第２保持部４４は、ウォーム歯車１００の種類に応じて適宜交換することができる。例えば、ウォーム歯車の寸法や形状に応じたゲージを保持した数種類の第１保持部及び第２保持部を準備しておき、測定対象に応じて、これを交換するようにすることで、測定装置１の汎用性を向上させることができる。 The first holding portion 43 and the second holding portion 44 can be appropriately replaced according to the type of the worm gear 100. For example, by preparing several types of first holding parts and second holding parts that hold gauges according to the dimensions and shapes of the worm gears and replacing them according to the measurement target, the measuring device can be used. The versatility of 1 can be improved.
　なお、第１保持部４３及び第２保持部４４を固定する固定具は、固定ねじ４３ｂ、４４ｂに限定されない。例えば、スライド可能に設けられた抑え板によって第１保持部４３及び第２保持部４４を脱着可能に固定するようにしてもよい。 The fixtures for fixing the first holding portion 43 and the second holding portion 44 are not limited to the fixing screws 43b and 44b. For example, the first holding portion 43 and the second holding portion 44 may be detachably fixed by a holding plate provided so as to be slidable.
　また、本実施形態では、第１基準板４１を下側に配置し、第２基準板４２を下側に配置しているが、これらを上下入れ替えて配置してもよい。また、これらの基準板の配置は、上下に限定されない。さらに、これらの基準板は、双方が相対的に近づき、また、離れることができれば、どの基準板を移動させてもよい。 Further, in the present embodiment, the first reference plate 41 is arranged on the lower side and the second reference plate 42 is arranged on the lower side, but these may be arranged interchangeably. Moreover, the arrangement of these reference plates is not limited to the top and bottom. Further, these reference plates may be moved by any reference plate as long as they are relatively close to each other and can be separated from each other.
　本実施形態では、第１のゲージ４５ａと第２のゲージ４５ｂは、ウォーム歯車１００のねじ部１０４を側面から観たときに、隣り合ったねじ溝１０５内に配置されるが、第１のゲージ４５ａと第２のゲージ４５ｂは、離して配置するようにしてもよい。 In the present embodiment, the first gauge 45a and the second gauge 45b are arranged in the adjacent thread grooves 105 when the threaded portion 104 of the worm gear 100 is viewed from the side surface, but the first gauge The 45a and the second gauge 45b may be arranged apart from each other.
　また、本実施形態では、第１基準部として第１基準面４１ａを採用し、第２基準部として第２基準面４２ａを採用しているが、第１基準部と第２基準部は、三針寸法と相関性を有する他の部分を採用してもよい。 Further, in the present embodiment, the first reference surface 41a is adopted as the first reference portion and the second reference surface 42a is adopted as the second reference portion, but the first reference portion and the second reference portion have three. Other parts that correlate with the needle size may be adopted.
　つぎに、図１１（Ａ）及び図１１（Ｂ）を参照しつつ、排出ステージ５０について説明する。図１１（Ａ）及び図１１（Ｂ）は排出ステージ５０の概略構成を示す説明図であり、図１１（Ａ）は上方から観た説明図、図１１（Ｂ）は正面から観た説明図である。 Next, the discharge stage 50 will be described with reference to FIGS. 11 (A) and 11 (B). 11 (A) and 11 (B) are explanatory views showing a schematic configuration of the discharge stage 50, FIG. 11 (A) is an explanatory view viewed from above, and FIG. 11 (B) is an explanatory view viewed from the front. Is.
　排出ステージ５０は、仕分け部５１と、良品ストック部５２と、不良品ストック部５３とを備えている。良品ストック部５２は、第１シュート５２ａを介して仕分け部５１と接続されている。不良品ストック部５３は、第２シュート５３ａを介して仕分け部５１と接続されている。 The discharge stage 50 includes a sorting unit 51, a non-defective product stock unit 52, and a defective product stock unit 53. The non-defective product stock unit 52 is connected to the sorting unit 51 via the first chute 52a. The defective product stock unit 53 is connected to the sorting unit 51 via the second chute 53a.
　仕分け部５１は、箱状の部材によって形成されており、内部に、揺動可能に設けられた仕分け板５１ａを備えている。仕分け板５１ａは、仕分け板駆動モータ５１ｂによって揺動駆動される。仕分け板５１ａは、ウォーム歯車１００の三針寸法の測定結果に基づいて、測定が終わったウォーム歯車１００を良品ストック部５２と不良品ストック部５３のいずれかへ仕分ける。 The sorting unit 51 is formed of a box-shaped member, and includes a sorting plate 51a provided so as to be swingable inside. The sorting plate 51a is oscillated by the sorting plate drive motor 51b. The sorting plate 51a sorts the worm gear 100, which has been measured, into either the non-defective stock section 52 or the defective stock section 53 based on the measurement result of the three-needle dimension of the worm gear 100.
　仕分け板駆動モータ５１ｂは、制御部３に含まれている排出口選定部３ｊと電気的に接続されている。排出口選定部３ｊは、三針寸法測定部３ｉによって得られた三針寸法が基準値以内であるか否かを判定し、その判定結果に基づいて、仕分け板５１ａの姿勢を変化させる。これにより、測定が終わったウォーム歯車１００を良品ストック部５２と不良品ストック部５３のいずれかへ仕分ける。 The sorting plate drive motor 51b is electrically connected to the discharge port selection unit 3j included in the control unit 3. The discharge port selection unit 3j determines whether or not the three-needle dimension obtained by the three-needle dimension measurement unit 3i is within the reference value, and changes the posture of the sorting plate 51a based on the determination result. As a result, the worm gear 100 whose measurement has been completed is sorted into either the non-defective stock section 52 or the defective stock section 53.
　保持台１０は、以上のような各ステージを巡回する。保持台１０を搭載したインデックステーブル２が備える駆動モータ２ａは、制御部３に含まれているテーブル回転制御部３ｋと電気的に接続されており、各ステージにおける工程の進み具合に応じてインデックステーブル２を回転させる。 The holding table 10 goes around each stage as described above. The drive motor 2a included in the index table 2 on which the holding table 10 is mounted is electrically connected to the table rotation control unit 3k included in the control unit 3, and is an index table according to the progress of the process in each stage. Rotate 2.
　つぎに、図１２に示すフローチャート及び工程毎に各ステージの構成を示す図面を参照しつつ、三針寸法測定方法の一例について、説明する。三針寸法の測定は、実施形態の測定装置１を稼働させることによって自動的に行うことができる。 Next, an example of the three-needle dimension measurement method will be described with reference to the flowchart shown in FIG. 12 and the drawing showing the configuration of each stage for each process. The measurement of the three-needle size can be automatically performed by operating the measuring device 1 of the embodiment.
　まず、三針寸法の測定の準備として、測定対象となるウォーム歯車１００の諸元に応じたゲージ４５ａ，４５ｂ，４５ｃを三針寸法測定ステージ４０にセットしておく。 First, in preparation for the measurement of the three-needle dimension, gauges 45a, 45b, 45c corresponding to the specifications of the worm gear 100 to be measured are set on the three-needle dimension measurement stage 40.
　そして、図１に示すように投入ステージ２０と対向している保持台１０に測定対象となるウォーム歯車１００を保持させる。フィーダ２１によって供給トレイ２２に供給されたウォーム歯車１００の向きが所定の向きと逆向きであった場合には、反転器２３が作動し、ウォーム歯車１００の向きが反転させられる。保持台１０がウォーム歯車１００を保持した後、インデックステーブル２が回転し、保持台１０は、外観検査ステージ３０と対向する位置に移動する。 Then, as shown in FIG. 1, the holding base 10 facing the closing stage 20 holds the worm gear 100 to be measured. When the direction of the worm gear 100 supplied to the supply tray 22 by the feeder 21 is opposite to the predetermined direction, the reversing device 23 operates and the direction of the worm gear 100 is reversed. After the holding table 10 holds the worm gear 100, the index table 2 rotates, and the holding table 10 moves to a position facing the visual inspection stage 30.
　三針寸法の測定は、この外観検査ステージ３０において開始される。すなわち、ステップＳ１の特徴部分の抽出が開始される。ステップＳ１では、外観検査ステージ３０と対向する位置に移動した保持台１０に保持されているウォーム歯車１００が回転する。ウォーム歯車１００が回転する様子は、第２カメラ３１によって連続的に撮像される。そして、撮像された画像に基づいて、特徴部分としての切り始め部１０４ａを示す形状に関する情報から、撮像画像中のどの部分が切り始め部１０４ａを示しているのかを判定し、その箇所の座標がＸ１として記憶される（抽出工程）。 The measurement of the three-needle size is started at this visual inspection stage 30. That is, the extraction of the feature portion of step S1 is started. In step S1, the worm gear 100 held by the holding table 10 that has moved to a position facing the visual inspection stage 30 rotates. The rotation of the worm gear 100 is continuously imaged by the second camera 31. Then, based on the captured image, it is determined from the information about the shape indicating the cutting start portion 104a as the feature portion, which part in the captured image indicates the cutting start portion 104a, and the coordinates of that portion are determined. It is stored as X1 (extraction step).
　つぎに、ステップＳ２において、特徴部分が所定位置に配置される（調整工程）。具体的に、測定対象のウォーム歯車１００の切り始め部１０４ａの位置が、予め記憶しているマスターピースの切り始め部１０４ａと一致するように測定対象のウォーム歯車１００を回転させる。ウォーム歯車１００の回転は、回転指示部３ｅの指示に基づいて実行される。 Next, in step S2, the feature portion is arranged at a predetermined position (adjustment step). Specifically, the worm gear 100 to be measured is rotated so that the position of the cutting start portion 104a of the worm gear 100 to be measured coincides with the cutting start portion 104a of the master piece stored in advance. The rotation of the worm gear 100 is executed based on the instruction of the rotation instruction unit 3e.
　つぎに、ステップＳ３において、測定対象が三針寸法を測定する三針寸法測定ステージ４０へ供給される。具体的に、切り始め部１０４ａの位置が調整されているウォーム歯車１００を把持している保持台１０が、インデックステーブル２が回転することにより、三針寸法測定ステージ４０と対向する位置まで移動する。そして、図８（Ａ）から図９に示すように、ウォーム歯車１００が第１基準板４１と第２基準板４２との間に位置するように、保持台１０が前進する。 Next, in step S3, the measurement target is supplied to the three-needle dimension measurement stage 40 for measuring the three-needle dimension. Specifically, the holding table 10 holding the worm gear 100 whose position of the cutting start portion 104a is adjusted moves to a position facing the three-needle dimension measuring stage 40 by rotating the index table 2. .. Then, as shown in FIGS. 8A to 9, the holding base 10 advances so that the worm gear 100 is located between the first reference plate 41 and the second reference plate 42.
　つぎに、ステップＳ４において、三針寸法を測定する（測定工程）。三針寸法の測定は、第２基準板４２を降下させ、ゲージ４５ａ，４５ｂ，４５ｃをそれぞれねじ溝１０５内に設置した状態とする。そして、第１基準面４１ａと第２基準面４２ａとの間隔、すなわち三針寸法Ｓを測定する。 Next, in step S4, the three-needle dimension is measured (measurement step). The measurement of the three-needle size is performed in a state where the second reference plate 42 is lowered and the gauges 45a, 45b, and 45c are installed in the screw grooves 105, respectively. Then, the distance between the first reference surface 41a and the second reference surface 42a, that is, the three-needle dimension S is measured.
　つぎに、ステップＳ５において、三針寸法の測定結果に基づいて、測定対象の仕分けが行われる。具体的に、三針寸法の測定が終了したウォーム歯車１００を把持している保持台１０が、インデックステーブル２が回転することにより、排出ステージ５０と対向する位置まで移動する。そして、測定された三針寸法が、予め定められた基準を満たしている場合には、そのウォーム歯車１００は、図１１（Ａ）、図１１（Ｂ）に示す良品ストック部５２へ送られる。一方、測定された三針寸法が、予め定められた基準を満たしていない場合には、そのウォーム歯車１００は、不良品ストック部５３へ送られる。なお、ウォーム歯車１００は、保持台１０が備えるスライダ１３が上昇することで、把持部１４によるウォーム歯車１００の把持状態が解除され、仕分け部５１内に落下し、仕分け板５１ａの位置に応じて、仕分けられる。 Next, in step S5, the measurement target is sorted based on the measurement result of the three-needle size. Specifically, the holding table 10 holding the worm gear 100 for which the measurement of the three-needle size has been completed moves to a position facing the discharge stage 50 as the index table 2 rotates. Then, when the measured three-needle dimension satisfies a predetermined standard, the worm gear 100 is sent to the non-defective stock unit 52 shown in FIGS. 11 (A) and 11 (B). On the other hand, if the measured three-needle dimension does not meet a predetermined standard, the worm gear 100 is sent to the defective stock unit 53. The worm gear 100 is released from the gripping state of the worm gear 100 by the gripping portion 14 when the slider 13 provided on the holding base 10 is raised, and falls into the sorting portion 51 according to the position of the sorting plate 51a. , Sorted.
　以上で、三針寸法を測定する一連の工程が終了する。排出ステージ５０において、ウォーム歯車１００の保持を解除した保持台１０は、インデックステーブル２が回転することで、再び、投入ステージ２０と対向する位置に移動し、次のウォーム歯車１００の供給を受けて、三針寸法を測定するための工程に移行する。測定装置１は、このような工程を繰り返す。 This completes a series of steps to measure the three-needle size. In the discharge stage 50, the holding table 10 released from holding the worm gear 100 moves to a position facing the closing stage 20 again by rotating the index table 2, and receives the supply of the next worm gear 100. , Move to the process for measuring the three-needle size. The measuring device 1 repeats such a process.
　なお、本実施形態では、回転するインデックステーブル２の周囲に、各工程を実行するためのステージが配置されているが、各ステージの形態は、この形態に限定されるものではない。各ステージの形態や保持台１０の動線は、必要に応じて適宜変更することができる。例えば、抽出部が特徴部分を抽出する位置や、測定台として機能するステージ等を直線的に配置し、保持台１０を直線的に移動させるようにしてもよい。 In the present embodiment, stages for executing each process are arranged around the rotating index table 2, but the form of each stage is not limited to this form. The form of each stage and the flow line of the holding table 10 can be appropriately changed as needed. For example, a position where the extraction unit extracts the feature portion, a stage that functions as a measuring table, or the like may be arranged linearly, and the holding table 10 may be moved linearly.
　本実施形態によれば、ウォーム歯車１００の外形上の特徴部分を抽出し、この特徴部分が所定位置に配置されるように調整される。そして、その状態で三針寸法を測定するゲージ４５ａ，４５ｂ，４５ｃがそれぞれねじ溝１０５内に設置されて、三針寸法が測定される。このため、多くのウォーム歯車１００に対して、統一された条件下で三針寸法を測定することができる。この結果、三針寸法の測定精度を向上することができる。また、ゲージ４５ａ，４５ｂ，４５ｃが配置する位置が特定されるため、ゲージ４５ａ，４５ｂ，４５ｃを配置する際に、ゲージ４５ａ，４５ｂ，４５ｃを配置する位置に調整が不要となり、三針寸法の測定における労力を低減することができる。 According to the present embodiment, a feature portion on the outer shape of the worm gear 100 is extracted, and the feature portion is adjusted so as to be arranged at a predetermined position. Then, gauges 45a, 45b, and 45c for measuring the three-needle dimension are installed in the screw groove 105 in that state, and the three-needle dimension is measured. Therefore, for many worm gears 100, it is possible to measure the three-needle size under unified conditions. As a result, the measurement accuracy of the three-needle dimension can be improved. Further, since the positions where the gauges 45a, 45b, 45c are arranged are specified, when the gauges 45a, 45b, 45c are arranged, it is not necessary to adjust the positions where the gauges 45a, 45b, 45c are arranged, and the three-needle size. The labor in measurement can be reduced.
　特徴部分の特定をウォーム歯車の外観を撮像する撮像部によって撮像された画像を用いることで、特徴部分の特定の精度が向上し、また、特徴部分の特定が容易となる。 By using the image captured by the imaging unit that captures the appearance of the worm gear to identify the feature portion, the accuracy of identifying the feature portion is improved, and the feature portion can be easily identified.
　また、ウォーム歯車のねじ部の端部を特徴部分とすることで、特徴部分の特定の精度が向上し、また、その特定が容易となる。 Further, by using the end of the threaded portion of the worm gear as the feature portion, the accuracy of identifying the feature portion is improved, and the identification is facilitated.
　第１のゲージ４５ａ及び第２のゲージ４５ｂを保持する第１保持部４３と、第３のゲージ４５ｃを保持する第２保持部４４を備えているので、毎回同じようにゲージ４５ａ，４５ｂ，４５ｃをねじ溝１０５に配置することができる。 Since the first holding portion 43 for holding the first gauge 45a and the second gauge 45b and the second holding portion 44 for holding the third gauge 45c are provided, the gauges 45a, 45b, 45c are similarly provided each time. Can be placed in the thread groove 105.
　本実施形態は、第１保持部４３を第1基準部に固定する固定具と、第２保持部４４を第2基準部に固定する固定具を備えているので、第１保持部４３及び第２保持部４４を交換することができ、汎用性が高い。 Since the present embodiment includes a fixture for fixing the first holding portion 43 to the first reference portion and a fixture for fixing the second holding portion 44 to the second reference portion, the first holding portion 43 and the first holding portion 43 and the second holding portion 44 are provided. 2 The holding portion 44 can be replaced, which is highly versatile.
　本実施形態では、ウォーム歯車１００を軸線ＡＸ回りに回転させる回転部を備えるので、特徴部分を所定位置に調整することが容易である。 In the present embodiment, since the worm gear 100 is provided with a rotating portion that rotates around the axis AX, it is easy to adjust the characteristic portion to a predetermined position.
　本実施形態では、ウォーム歯車１００を把持し、抽出部が特徴部分を抽出する位置（外観検査ステージ３０）と、測定台（三針寸法測定ステージ４０）とへ、ウォーム歯車１００を順次搬送する搬送部（保持台１０）を備えている。これにより、ウォーム歯車１００を各工程が実行される位置へ搬送することができる。また、搬送部は、回転テーブル（インデックステーブル２）上に設けられ、抽出部が前記特徴部分を抽出する位置（外観検査ステージ３０）と、測定台（三針寸法測定ステージ４０）は、それぞれ回転テーブルの周囲に配置されている。これにより、効率よくウォーム歯車１００を搬送することができる。なお、特徴部分を抽出後、測定台へ移動しつつ、特徴部分を所定位置に調整してもよい。これにより、工程時間を短縮することができる。 In the present embodiment, the worm gear 100 is sequentially conveyed to a position where the worm gear 100 is gripped and the extraction unit extracts a feature portion (visual inspection stage 30) and a measuring table (three-needle dimension measurement stage 40). A unit (holding table 10) is provided. As a result, the worm gear 100 can be transported to a position where each process is executed. Further, the transport unit is provided on the rotary table (index table 2), and the position where the extraction unit extracts the characteristic portion (visual inspection stage 30) and the measuring table (three-needle dimension measurement stage 40) rotate respectively. It is placed around the table. As a result, the worm gear 100 can be efficiently conveyed. After extracting the feature portion, the feature portion may be adjusted to a predetermined position while moving to the measuring table. As a result, the process time can be shortened.
　本実施形態では、投入ステージ２０、外観検査ステージ３０、三針寸法測定ステージ４０及び排出ステージ５０を備えているが、これら以外のステージを設けてもよい。例えば、ウォーム歯車１００を洗浄する洗浄ステージや、ウォーム歯車１００の各部の寸法を測定する測定ステージを配置するようにしてもよい。 In the present embodiment, the loading stage 20, the visual inspection stage 30, the three-needle dimension measuring stage 40, and the discharging stage 50 are provided, but stages other than these may be provided. For example, a cleaning stage for cleaning the worm gear 100 and a measurement stage for measuring the dimensions of each part of the worm gear 100 may be arranged.
　また、本実施形態では、ウォーム歯車１００の外観を撮像する撮像部としての第２カメラ３１によって撮像された画像に基づいて特徴部分を抽出しているが、第２カメラ３１に替えて、図１３に示すようなレーザ装置３２を採用してもよい。ウォーム歯車１００の外形上の特徴部分を抽出できるものであれば、従来公知の手法を採用することができる。 Further, in the present embodiment, the feature portion is extracted based on the image captured by the second camera 31 as the imaging unit for capturing the appearance of the worm gear 100, but instead of the second camera 31, FIG. 13 The laser apparatus 32 as shown in the above may be adopted. A conventionally known method can be adopted as long as the characteristic portion on the outer shape of the worm gear 100 can be extracted.
　以上、本発明の実施例について詳述したが、本発明はかかる特定の実施例に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。
　 Although the examples of the present invention have been described in detail above, the present invention is not limited to such specific examples, and various modifications and modifications are made within the scope of the gist of the present invention described in the claims. It can be changed.

Claims (9)

  1. 　三針寸法の測定対象となるウォーム歯車の外形上の特徴部分を抽出する抽出部と、
    　前記ウォーム歯車を前記特徴部分が所定位置に配置された状態に調整する調整部と、
    　前記調整部によって状態が調整された前記ウォーム歯車が供給されるとともに、供給された前記ウォーム歯車の三針寸法を測定するゲージが前記ウォーム歯車のねじ部に形成されたねじ溝に対して接触及び離間可能に設けられ、前記ゲージが前記ねじ溝内に配置された状態で前記ウォーム歯車の三針寸法を測定する測定台と、
    を備えたことを特徴とする三針寸法測定装置。     An extraction unit that extracts the characteristic parts on the outer shape of the worm gear to be measured for the three-needle size,
    An adjusting unit that adjusts the worm gear so that the characteristic portion is arranged at a predetermined position,
    The worm gear whose state has been adjusted by the adjusting portion is supplied, and a gauge for measuring the three-needle dimension of the supplied worm gear comes into contact with the thread groove formed in the threaded portion of the worm gear. A measuring table that is provided so as to be separable and that measures the three-needle dimension of the worm gear in a state where the gauge is arranged in the thread groove.
    A three-needle dimensional measuring device characterized by being equipped with.
  2. 　前記抽出部は、前記ウォーム歯車の外観を撮像する撮像部を含み、
    　前記撮像部により撮像された前記ウォーム歯車の撮像データに基づき、前記ウォーム歯車の外観検査を行う外観検査部をさらに備えたことを特徴とする請求項１に記載の三針寸法測定装置。     The extraction unit includes an imaging unit that images the appearance of the worm gear.
    The three-needle dimensional measuring device according to claim 1, further comprising an appearance inspection unit that inspects the appearance of the worm gear based on the imaging data of the worm gear imaged by the imaging unit.
  3. 　前記抽出部は、前記ねじ部の端部を特徴部分として抽出することを特徴とする請求項１又は２に記載の三針寸法測定装置。 The three-needle dimension measuring device according to claim 1 or 2, wherein the extraction unit extracts an end portion of the screw portion as a feature portion.
  4. 　前記測定台は、前記ゲージに含まれる第１のゲージ及び第２のゲージを保持する第１保持部と、前記ゲージに含まれる第３のゲージを保持するとともに、前記第１保持部との間に前記ウォーム歯車が供給された状態で、前記第１保持部に対して相対的に接近及び離間可能に設けられた第２保持部と、を含むことを特徴する請求項１から３のいずれか１項に記載の三針寸法測定装置。 The measuring table is between the first holding portion that holds the first gauge and the second gauge included in the gauge and the third holding portion that holds the third gauge included in the gauge and the first holding portion. 1. The three-needle dimension measuring device according to item 1.
  5. 　前記第１保持部を第１基準部に固定する固定具と、前記第２保持部を第２基準部に固定する固定具とを、さらに備えたことを特徴とする請求項４に記載の三針寸法測定装置。 3. The third according to claim 4, further comprising a fixture for fixing the first holding portion to the first reference portion and a fixture for fixing the second holding portion to the second reference portion. Needle dimension measuring device.
  6. 　前記調整部は、前記ウォーム歯車の端部を把持する把持部と、当該把持部によって把持した前記ウォーム歯車を軸線回りに回転させる回転部と、を備えたことを特徴とする請求項１から５のいずれか一項に記載の三針寸法測定装置。 Claims 1 to 5 include, wherein the adjusting portion includes a grip portion that grips the end portion of the worm gear and a rotating portion that rotates the worm gear gripped by the grip portion around an axis. The three-needle dimension measuring device according to any one of the above.
  7. 　前記ウォーム歯車を把持し、少なくとも前記抽出部が前記特徴部分を抽出する位置と、前記測定台とへ、前記ウォーム歯車を順次搬送する搬送部を備えたことを特徴とする請求項１から６のいずれか一項に記載の三針寸法測定装置。 Claims 1 to 6, wherein the worm gear is gripped and at least a position where the extraction unit extracts the feature portion and a transport unit for sequentially transporting the worm gear to the measuring table are provided. The three-needle dimensional measuring device according to any one item.
  8. 　前記搬送部は、回転テーブル上に設けられ、前記抽出部が前記特徴部分を抽出する位置と、前記測定台は、それぞれ前記回転テーブルの周囲に配置されていることを特徴とする請求項７に記載の三針寸法測定装置。 The seventh aspect of claim 7 is characterized in that the transport unit is provided on a rotary table, the position where the extraction unit extracts the characteristic portion, and the measuring table are arranged around the rotary table, respectively. The three-needle dimensional measuring device described.
  9. 　三針寸法の測定対象となるウォーム歯車の外形上の特徴部分を抽出する抽出工程と、
    　前記ウォーム歯車を前記特徴部分が所定位置に配置された状態に調整する調整工程と、
    　前記調整工程において状態が調整された前記ウォーム歯車を、第１のゲージを保持する第１保持部と、第２のゲージ及び第３のゲージを保持するとともに、前記第１保持部に対して相対的に接近及び離間可能に設けられた第２保持部との間に供給する工程と、
    　前記ウォーム歯車の三針寸法を測定する測定工程と、
    を含むことを特徴とする三針寸法測定方法。
    　     An extraction process that extracts the characteristic parts on the outer shape of the worm gear to be measured for the three-needle size,
    An adjustment step of adjusting the worm gear so that the characteristic portion is arranged at a predetermined position, and
    The worm gear whose state has been adjusted in the adjustment step holds the first holding portion for holding the first gauge, the second gauge and the third gauge, and is relative to the first holding portion. A step of supplying the product between the second holding portion and the second holding portion provided so as to be approachable and separable.
    A measurement process for measuring the three-needle dimension of the worm gear, and
    A three-needle dimensional measurement method comprising.
PCT/JP2021/009140 2020-03-25 2021-03-09 Three-stitch dimension measuring device and three-stitch dimension measuring method WO2021192989A1 (en)

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US4480388A (en) * 1983-05-02 1984-11-06 Brien Orlin P O Apparatus for three-wire method of thread pitch diameter measurement
JPH10111122A (en) * 1996-10-03 1998-04-28 Honda Motor Co Ltd Device for measuring screw of ball screw unit and nut measuring device
JP2003004437A (en) * 2001-06-26 2003-01-08 Honda Motor Co Ltd Vernier calipers for measurement
JP2005214751A (en) * 2004-01-28 2005-08-11 Tsunehiro Yoshida Inspection device of screw
JP2007240489A (en) * 2006-03-13 2007-09-20 Space Creation:Kk Device for measuring over-pin diameter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4480388A (en) * 1983-05-02 1984-11-06 Brien Orlin P O Apparatus for three-wire method of thread pitch diameter measurement
JPH10111122A (en) * 1996-10-03 1998-04-28 Honda Motor Co Ltd Device for measuring screw of ball screw unit and nut measuring device
JP2003004437A (en) * 2001-06-26 2003-01-08 Honda Motor Co Ltd Vernier calipers for measurement
JP2005214751A (en) * 2004-01-28 2005-08-11 Tsunehiro Yoshida Inspection device of screw
JP2007240489A (en) * 2006-03-13 2007-09-20 Space Creation:Kk Device for measuring over-pin diameter

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