JP3105398B2 - 3D shape measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional shape measuring apparatus for performing three-dimensional measurement and scribing processing on an object to be measured fixed on a surface plate or the like.

[0002]

2. Description of the Related Art A tertiary method for performing a dimension measurement and a scribing process by performing a three-dimensional approach on an object to be measured placed on a surface plate or an object stopped on a floor surface adjacent to the surface plate. Original shape measuring devices have been put to practical use. An example of the application of the three-dimensional shape measuring apparatus is a predetermined XYZ coordinate on a three-dimensional curved surface of a mold for collecting XYZ numerical data of a number of points representing a three-dimensional shape of a clay model of an automobile body or a real body. And forming a scribe line for the post-process at the position. The three-dimensional shape measuring apparatus is composed of a surface plate for fixing an object to be measured and a measuring unit movable on the surface plate around the object to be measured, and the measuring unit is arranged in a direction of a first axis of the surface of the surface plate. Along the base that can move along the trajectory provided and the column that stands on the base,
The head includes a head movable in a second axis direction perpendicular to the surface of the platen, and an arm supported by the head and movable in a third axis direction perpendicular to both the first axis and the second axis. At the tip of the arm, a point sensor (touch probe, non-contact probe: laser method, etc.) or a scribe is attached according to the application.

A conventional three-dimensional shape measuring apparatus will be described with reference to FIG. FIG. 4 is a perspective view of the three-dimensional shape measuring device. Here, three-dimensional measurement is performed by causing the base 53 to approach the measurement object (not shown) fixed on the surface plate 51 from all sides. The height of the column 54 is about 2.5 m, which is the most standard, and allows the head 54 to have a vertical stroke of about 2 m or more. In this case, the worker
Usually, the user stands on the surface plate 51 and operates the head 55 and the like. The height of the column 54 is 1 m according to the application.
There are various types from the following low ones to high ones exceeding 3 m. The dimensions of the X axis can be obtained from the amount of movement of the base 53, the Z axis can be obtained from the amount of movement of the head 55 along the column 54, and the dimension of the Y axis can be obtained by the amount of the arm 56 sent from the head 54.

[0004] On the surface of the surface plate 51 for fixing an object to be measured,
Two orthogonal feed grooves 51A and 51B are provided.
A rib structure (not shown) is formed on the back surface side of the surface plate 51, and high rigidity in which the amount of deflection is suppressed is ensured even if the measured object, the base 53, and the weight of the operator are supported. Place the linear holder 52 on the surface plate 5 in parallel with the feed groove 51B in the X-axis direction.
It is fixed at 1. The linear holder 52 includes a base 53
, And can be attached to any position of the feed grooves 51A, 51B by the two linear blocks 52A, 52B. Linear holder 52
Has a digital scale (generally an optical reading type and a magnetic scale is also applicable) attached to the upper surface, and a rack is formed on the invisible back side surface. A pinion gear shaft-connected to the base feed knob 57A on the base 53 and stored in the base 54 meshes with the rack. When the operator rotates the base feed knob 57A, the base 53 moves into the feed groove 51B.
Along the X axis. Further, the scale of the digital scale of the linear holder 52 is read by a reading head (not shown) fixed to the base 53, and the moving amount in the X-axis direction is digitally displayed. The display is made on a display device of XYZ coordinate values (not shown) fixed and provided above the base 53.

[0005] The base 53 is provided with roller wheels (not shown) at three or more places on the back surface (there are also five places in the case of a large-sized apparatus in which the height of the column 54 exceeds 3 m). It can move freely in the direction of the feed groove 51B. In addition, a guide roller (not shown) provided on the back surface guides the side wall of the feed groove 51B so that the traveling direction of the base 53 matches the direction of the feed groove 51B. In addition, the linear holder 52 is replaced with the feed groove 51A in the Y direction, and the base 53 is rotated by 90 degrees to change the rotation direction of the feed roller into the feed groove 51A.
, And furthermore, the guide roller is fed into the feed groove 51.
If it is dropped into A, the base 53 can be moved in the Y direction. By repeating such operations, the base 53
Can rotate in four directions surrounding the object to be measured fixed to the center of the surface plate 51. The base 53 can be locked on the surface plate 51 at an arbitrary position of the linear holder 52 by a lock mechanism (not shown).

A column 54 standing upright on a base 53 supports a head 55 movably in the Z-axis (vertical) direction. The column 54 has a circular cross section (may be a square cross section) in which three strings are cut out, and the head 5 is formed in the plane of the three strings.
5, three sets of friction rollers are pressed. The column 54 is a feed trajectory in the Y direction of the head 55 constrained by these friction rollers. Further, regarding the feed drive, a head feed knob 57C is linked (for example, shaft-coupled) to a friction roller that restrains a flat surface on the front side of the column 54. In some cases, a rack is provided on the column 54 side, and a pinion gear stored in the head 55 is engaged with the rack. A weight is suspended in the column 54 by a wire 58 </ b> A, and the weight urges the head 55 upward through the pulley 58. Therefore, the operator operates the head feed knob 57C to move the head 55 to the column 5.
It can be moved lightly up and down along 4. The head 55 can be fixed at an arbitrary height position of the column 54 by a lock mechanism (not shown). In the measurement in the Z direction, the digital scale attached to the column 54 is read by a reading head (not shown) attached to the head 55, and is digitally displayed together with the X-axis coordinate values.

An arm 56 horizontally supported by a head 55
Can attach the measurement attachment 59 to the tip, and can set the sending amount from the head 55 freely. Arm 5
6 also has a circular cross section with three strings cut out, and three planes are respectively restrained by another three sets of friction rollers provided on the head 55. A friction roller that restrains the lower flat surface of the arm 56 is interlocked with (for example, shaft-coupled to) the arm feed knob 57B. The operator can feed the arm 56 from the head 55 to any length by operating the arm feed knob 57B. The measurement in the Y direction
6 is read by a reading head (not shown) attached to the head 55, and the X-axis and Z-axis are read.
Digital display with axis coordinate values.

The measurement attachment 59 generates a trigger signal at the moment when the tip of the touch probe comes into contact with an object. X axis digitally displayed by this trigger signal,
The coordinate values of the Y axis and the Z axis are locked and set as the coordinate position of the front surface. The touch probe is supported by a structure that can escape at least in the feed direction (preferably all directions) at the time of measurement, and the escape amount absorbs the feed amount of the arm 56 after the contact. The scribing operation can be performed by replacing the measurement attachment 59 with a scribing needle attachment.

An example of the clay model dimensioning operation in the conventional three-dimensional shape measuring apparatus described above is executed in the following procedure. First, a clay model of an object to be measured is fixed at the center of the surface plate 51, and a feed groove 51 in the X-axis direction immediately adjacent thereto is provided.
B guides the base 53 to the two linear blocks 5
2A and 52B are fixed, and the linear holder 52 is positioned parallel and horizontally to the feed groove 51B. And
Operate the base feed knob 57A to move the base 53,
The tip of the touch probe of the measurement attachment 59A is guided to a predetermined X coordinate position, and the base 53 is locked on the surface plate 51. Next, the head feed knob 57C is operated to move the head 55 up and down, and the tip of the touch probe of the measurement attachment 59A is guided to a predetermined Z coordinate position, and the head 5 is moved.
Lock 5 on column 54. In this state, the arm 56 is sent out by operating the arm feed knob 57B, and the tip of the touch probe of the measurement attachment 59A is brought into contact with the clay model, and the X-axis, Y-axis, and Z-axis coordinate values displayed on the display device are read. Lock. The locked coordinate values are taken in as one of the three-dimensional data of the clay model surface. The height position of the head 55 is moved stepwise, and a plurality of Z-coordinate values of one X-coordinate value are converted to X-coordinates of the three-dimensional shape of the clay model.
After determining the coordinate values of the axes, the Y axis, and the Z axis, the base 53
And the same operation is repeated at the next X-axis coordinate value. In addition to collecting the coordinate position of the Y axis at the stepwise coordinate positions of the X axis and the Z axis, various procedures such as collecting the coordinate position of the X axis at the stepwise coordinate positions of the Z axis and the Y axis, etc. Dimensioning work is possible.

According to the three-dimensional shape measuring apparatus, all points in the space above the surface plate 51 are directly taken out as XYZ coordinate values sharing the origin, so that a complicated operation for finding the origin for each measurement and complicated measurement values are required. There is no need for simple subtraction calculation, rotational movement of the object to be measured, and setup work.

[0011]

In the conventional three-dimensional shape measuring apparatus, the position of the base feed knob 57A is considerably apart from the head feed knob 57C and the arm feed knob 57B in the vertical direction. There is a problem that the operator cannot operate the base feed knob 57A unless the operator squats down. In the above-described clay model dimensioning work, the worker concentrates his or her attention on the tip of the touch probe of the measurement attachment 59. Regarding the head feed knob 57C and the arm feed knob 57B, the operator can simultaneously operate the head attachment knob 57B while standing on the surface plate 51 while visually recognizing the tip of the touch probe of the measurement attachment 59, but only the base feed knob 57A is an independent one. Operation. If the operator reads the scale provided on the surface of the linear holder 52 one by one to position the base 53,
Although the XYZ coordinate values are simultaneously digitally displayed on one display and the XYZ coordinate values can be read from anywhere on the surface plate 51, one independent operation is required only for the base feed. Not preferred. Actually, when the arm 56 is sent out from the head 55 by more than 1 m and the operator is watching the tip of the touch probe of the measurement attachment 59 in the immediate vicinity of the clay model, the operator operates the head feed knob 57C and the arm feed knob 57B. Even returning to the front of the column 54 is troublesome.

When the base 53 or the head 55 is to be moved while the line of sight is removed from the tip of the touch probe of the measurement attachment 59 during the above-described clay model dimensioning operation, the measurement attachment 59 is moved prior to the movement.
It is necessary to largely retreat the whole from the clay model surface to prevent unnecessary collision of the tip of the touch probe during the feeding movement. When the tip of the touch probe is inserted into a hole or an opening of an object to be measured, it is particularly necessary to retreat the touch probe.
If it is retracted greatly, it will be sent out greatly at the next measurement point, and the time for one measurement will be extended. In the dimensioning work of the clay model, this is repeated 100 times or more.

In order to improve the operability of the base feed knob 57A, the axis of the base feed knob 57A is lengthened to make the base 53
A structure that stands up in the sky was considered. In this case, the operator may hold the tip of the base feed knob 57A and rotate it while standing on the surface plate 51. But,
Since the measurement is performed with the height position of the head 55 being variously changed, the head feed knob 57C or the arm feed knob 57C is used.
It is not easy to find the tip of the base feed knob 57A by groping while operating B. This is particularly difficult when the head 55 is at an extremely high or low position. The base feed knob 57 </ b> A that is cantilevered from the base 53 may cause an operator to hit his hand at the tip or to pinch an object between the head 55 and the arm 56. Thick shafts and large bearings are also needed to obtain the required rigidity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a three-dimensional shape measuring apparatus in which the operability of feed movement of a base is improved to a maximum by adding a minimum number of parts.

[0015]

According to a first aspect of the present invention, there is provided a three-dimensional shape measuring apparatus which moves along a track provided in a direction of a first axis on a surface of a surface plate.
A base movable by a manual operation of an operator, a head movable along a column erected on the base in a direction of a second axis perpendicular to the platen surface, and a head supported by the head; An arm movable in a direction of a third axis perpendicular to both the first axis and the second axis, wherein the arm stands upright on the base in parallel with the column, and has both upper and lower ends. A feed operation rod rotatably supported in a formula and a rotation transmitting mechanism for transmitting rotation by connecting a feed drive member of a first shaft for urging the base along the track and the feed operation rod are added. And rotate the feed operation rod.
Thus, the feed drive member of the first shaft can be driven .

According to a second aspect of the present invention, in the configuration of the first aspect, the rotation transmission mechanism includes a first pulley connected to a lower end of the feed operation rod, and a feed drive member of a first shaft. A second pulley connected to a base and disposed on a base, and a timing belt hung between the first and second pulleys, and near feed knobs of a second shaft and a third shaft disposed on the head. And the feed operation rod is raised.

According to a third aspect of the present invention, there is provided the three-dimensional shape measuring apparatus according to the second aspect, wherein the head is axially penetrated and the second
A pair of the feed knobs for the shaft and the third shaft are provided, respectively, and the feed knob can be operated from both sides sandwiching the head.

[0018]

In the three-dimensional shape measuring apparatus according to the first aspect, the operator rotates the feed operation rod set on the base at a position convenient for the operator to feed and move the base. The feed control rod is rotated by gripping the side, and the operator can select a free height position of the feed control rod. The relative positions of the part to be rotated during the feed movement of the base, the head feed knob and the arm feed knob can be the same at all possible height positions of the head. Therefore, even in the groping state, the feed operation rod can be easily found, and the operation rod can be freely operated while standing on the surface plate. The rotation transmission mechanism may be directly connected by a shaft, but in order to secure the degree of freedom of arrangement and design of the feed drive mechanism and the feed operation rod of the base, a gear mechanism for transmitting a rotational force between shafts that are separated in a plane, It is preferable to use a universal joint, a belt hook or the like.

The structure in which the feed operation rod is held in a two-sided manner can firmly hold the operation part with a simple support mechanism only for a long time as compared with a structure in which the feed operation rod stands up in a cantilever manner. Also,
The above-mentioned inconvenience caused by the top of the base feed knob that cantilever stands up can be eliminated. In addition to such a basic structure, if the feed operation rod is supported in such a way that both ends of the feed operation rod can be swung, smooth rotation is possible due to vertical misalignment and bending of the feed operation rod. Therefore, even when the feed operation rod is attached to the column in a double-supported manner, no abnormal horizontal force acts on the column. In addition, if the base feed is locked by the lock mechanism of the feed operation rod, the base feed lock operation can be executed while standing on the surface plate. Further, if a pair of lock mechanisms are provided above and below the feed operation rod, the operator does not need to change the posture only for the lock operation. The lower locking mechanism in the squatting position and the upper locking mechanism in the upright position can be used by reaching out.

In the three-dimensional shape measuring apparatus according to the second aspect, the feed operation rod can be searched for and operated with the same effort as when operating the head feed knob and the arm feed knob. Further, the rotation transmission mechanism can be configured by adding a minimum number of components to the conventional feed drive mechanism. The overall weight increase due to the addition of the rotation transmission mechanism is also small compared to the case where gear transmission is performed.

In the three-dimensional shape measuring apparatus according to the third aspect, the head feed operation and the arm feed operation can be performed in the same manner as the base feed operation can be performed by rotating the feed operation rod at the upper and lower positions sandwiching the head (particularly the arm). Can also be performed from both sides of each part of the head. The head feed and the arm feed can be executed by rotating one or both of a pair of feed knobs each having a head penetrating the shaft. For example, when measuring two surfaces of a large object to be measured separated in the base feed direction (for example, the front and rear sides of an actual vehicle body placed in the base feed direction), work on one surface on the front side of the head. While the measurement point can be visually recognized, the measurement point on the other surface may not be visually recognized without working on the back side of the head. However, when working on the back side, it is difficult to operate the same head feed knob and arm feed knob operated from the front side. The structure in which these knobs are provided as a pair with the head interposed therebetween improves the operability of the head feed and the arm feed in the operation on the back side of the head, and eliminates the need to determine the operation direction according to the operation convenience.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional shape measuring apparatus according to an embodiment will be described with reference to FIGS. FIG. 1 is a front view of the entire structure, FIG. 2 is an enlarged view of a double-supported portion of the feed operation rod, and FIG. 3 is a plan view of the entire structure. In FIG. 2, (a) is an upper support mechanism, (b)
Is a lower support mechanism. 3, (a) is a plan view,
(B) is a horizontal sectional view at the height below the head. Here, the feed operation rod 35 is supported by the column 14 in a double-supporting manner, and the friction roller 26 for driving the base 13 and the feed operation rod 35 are connected by a timing belt 37.

In FIG. 1, unlike the case of FIG. 4, the base 13 is guided in the direction of the feed groove 11B by sandwiching the edge of the platen 11 and the side wall of the feed groove 11B between the friction rollers 25 and 26. In addition, the base 13 can be moved by rotating the base feed knob 24 which is connected to the friction roller 25. The amount of feed movement of the base 13 is determined by a digital scale (not shown) provided on the surface plate 11 (in some cases, a linear holder is used as shown in FIG. 4 or the digital scale is fixed to the edge of the surface plate 11 or the like). It is read and measured by a reading head (not shown) provided on the base 13. Further, the rolling length of the surface plate 11 may be measured using a rolling type length measuring device. In any case, on the lower surface side of the base 13,
Three sets of support rollers (not shown) are incorporated and feed grooves 11
Free movement in the direction of B is enabled. The column 14 and the tension rod 2 are provided on the upper surface of the base 13.
3 stands upright. The upper end of the tension rod 23 is fixed to the flange 21 at the upper end of the column 14 with high rigidity using a nut 22, and cooperates with the column 14 to form a kind of ramen structure. The tension rod 23 supports the column 14 in a two-sided manner, and increases the upright rigidity of the column 14.

A head 15 is movably supported along the column 14. The head 15 has a vertical axis guide 15A surrounding the column 14 and a horizontal axis guide 15B surrounding the arm 16 and is integrally formed. The head 15 is mounted on the column 14
Wire 18 with one end tied to a weight suspended inside
By A, the head 15 is suspended via the pulley 18 in such a manner as to offset the own weight of the head 15. The operator can lightly move the entire head 14 in the vertical direction by rotating the head feed knob 17C provided on the vertical axis guide 15A. The feed amount of the arm 16 can be freely set by rotating an arm feed knob 17B provided on the horizontal axis guide 15B. Arm 16
Attachment (59) according to the application is attached to the tip of the, as in the case of FIG.

The feed operation rod 35 for feeding and moving the base 13 in the direction of the guide groove 11B is supported by the upper support mechanism 33 and the lower support mechanism 36 in a rotatable and double-supported manner, and stands vertically on the base 13. A horizontal flange member 31 is fixed to the upper end of the column 14, and the flange member 31
, The support pipe 32 is suspended and fixed. The upper support mechanism 33 fixed to the lower end of the support pipe 32 supports the upper end of the feed operation rod 35 rotatably and swingably.
The upper support mechanism 33 has a built-in lock mechanism, which will be described later.
Can be locked. On the other hand, a lower support mechanism 36 is fixed to the base 13. The lower end portion of the feed operation rod 35 is configured to be able to swing, and this swingable portion is rotatably supported by a lower support mechanism 36.
Since the upper and lower ends of the feed operation rod 35 are held so as to be able to swing, the axes of the upper support mechanism 33 and the lower support mechanism 36 are displaced and do not match, or the feed operation rod 35 is bent or bent. Even in this case, the feed operation rod 35 can be smoothly rotated. The lower support mechanism 33 also has a built-in lock mechanism described below, and the rotation of the feed operation rod 35 can be locked by tightening the handle 34B.

A pulley support 38 is provided on the upper surface of the base 13.
Is fixed. The pulley stored in the pulley support 38 is axially connected to the friction roller 26 dropped into the feed groove 11B. On the other hand, pulleys are also stored in the lower support mechanism 36, and a timing belt 37 is hung between the two pulleys. The rotation of the feed operation rod 35 rotates the friction roller 26 via the timing belt 37, and drives the base 13 in the direction of the feed groove 11B. A tension mechanism 39 mounted on the base 13 so as to be capable of adjusting its position in a direction perpendicular to the timing belt 37 pushes the back surface of the timing belt 37 with an idle roller to set an appropriate tension on the timing belt 37.

In FIG. 2A, an upper support mechanism 33 fixed to a support pipe 32 has a built-in spherical bearing 4.
1, the feed operation rod 35 is supported rotatably and swingably. The feed operation rod 35 is suspended and supported by the spherical bearing 41 by tightening a nut 42 into a female screw at the upper end. The rotation of the feed operation rod 35 can be locked by tightening the drum portion 43B located below the female screw at the upper end of the feed operation rod 35 with the brake shoe 43A. When the operator rotates the handle 34A which can be operated in the standing posture, the brake shoe 43A tightens the drum portion 43B. When the rotation of the feed operation rod 35 is locked, the rotation of the friction roller 26 is locked via the timing belt 37 in FIG. 1, and the base 13 is fixed on the surface plate 11.

In FIG. 2B, a universal joint 44 is fixed to the lower end of the feed rod 35. Universal joint 44
Is rotatably supported by a bearing 45 built in the lower support mechanism 36. A timing belt 37 is hung on a timing belt driving pulley 46 fixed to the shaft of the universal joint 44. The lower support mechanism 36 includes the base 1
3 is attached to the shallow recess formed on the upper surface of the base 13 so as to be half-sinked, and the timing belt 37 is also half-sunk in the shallow groove formed on the upper surface of the base 13 and extends. Similarly to the upper instruction mechanism 33, the drum unit 43D
Can be locked by the brake shoe 43C to lock the rotation of the feed operation rod 35. The locking operation is performed by the handle 34B arranged so as to be adapted to the posture of the operator squatting down.

3A is a plan view of the three-dimensional shape measuring apparatus of FIG. 1 as viewed from above, and FIG. 3B is a horizontal cross-sectional view taken at a position below the head 15. The base 13 without the top structure of the head 15 and the column 14
FIG. A tension rod 23 is fixed to a flange 21 fixed to the tip of a column 14 standing upright from the base 13.
Is fixed at the upper end. The upper end of the feed operation rod 35 is supported by the flange 31 projecting to the opposite side of the tension rod 23 across the column. When the feed operation rod 35 is rotated, the friction roller (26) in the feed groove 11B rotates through the pulley in the lower support mechanism 36, the timing belt, and the pulley support 38 in order. Thereby, the surface plate 11
The base 13 feeds and moves upward in the direction of the feed groove 11B.

In FIG. 3A, a pair of head feed knobs 17C are arranged so that the vertical shaft support 15A of the head 15 is axially penetrated as shown by a broken line in the figure. On the other hand, a pair of arm feed knobs 17B are arranged so that the horizontal shaft holding portion 15B passes through the shaft as shown by a broken line in the drawing. Therefore, on the measurement object side on the surface plate 11, the feed operation rod 35, the head feed knob 17C, and the arm feed knob 17B are arranged very close to each other. The configuration of other parts not shown in FIGS. 1 to 3 is the same as that of the conventional three-dimensional shape measuring apparatus described with reference to FIG.

In the three-dimensional shape measuring apparatus of the present embodiment configured as described above, the head feed knob 17C and the arm feed knob 1C are maintained while the operator stands on the surface plate 11.
The base 13 can be fed and moved in the direction of the feed groove 11B by rotating the feed operation rod 35 as easily as 7B. Further, since the feed operation rod 35 can be operated in the same manner at an arbitrary height position, the operation can be easily transferred from the head feed knob 17C or the arm feed knob 17B to the feed operation rod 35 at any height position of the head 15. it can. Further, since the handle 34A for locking the feed movement of the base 13 is arranged at a position where the hand can be reached along the feed operation rod 35, the base 1
3 can be continuously and easily executed even in a groping state, such as a series of operations of the feed movement, the lock thereof, the operation of the head feed knob 17C, the lock of the head feed, and the operation of the arm feed knob 17B. In addition, since the lock mechanism is also provided at the lower end of the feed operation rod 35, it is not necessary to stand up only for operating the handle 34A even at a low position. The base feed may be locked by the handle 34B. Therefore, the operator selects a free position and posture, and
The measurement points can be positioned one after another in any of the XYZ directions while keeping the line of sight fixed to the needle point of the measurement attachment (59) provided at the tip of the device or the surface of the clay model.

Further, the feed belt 35 can be arranged at any position on the base 11 by the timing belt 37, and a position having the highest operability with priority on operational convenience can be selected. Further, the head feed knob 17
C and a pair of arm feed knobs 17B are provided, and the head feed knob 17C, the arm feed knob 17B, and the feed operation rod 35 are arranged very close to each other, so that the operator does not need to return to the front position of the column 14, Extend the hand from the position where the needle point of the measurement attachment (59) can be observed immediately adjacent to the clay model so that the measuring point can be accurately and quickly shifted in any of the XYZ directions even with perfect groping. became.

The present invention is not limited to the configuration shown in FIGS. In this embodiment, the base 13 is fed and moved by the friction rollers 25 and 26 with the feed grooves 11A and 11B and the edge of the surface plate 11 being sandwiched. However, as in the configuration of the conventional example in FIG. Base 53
May be driven. In some cases, two parallel feed grooves are used as tracks, or a track other than the linear holder 52 shown in FIG. 4 is set on the surface plate. Further, the measurement of the coordinate position may be performed by direct reading of a magnetic scale or a scale scale without depending on the optical scale. In this embodiment, the column 14 has a rectangular cross section, but may have a circular cross section as in the configuration of the conventional example in FIG. Other triangular cross sections may be used.

[0034]

According to the three-dimensional shape measuring apparatus of the present invention,
Head feed, arm feed,
Since the positional relationship of each operation part of the base feed becomes equal,
These operations can be continuously performed with the same ease without changing the working posture or moving the line of sight. Therefore,
The time required for positioning a measurement point or the like is reduced, and accurate positioning with a margin can be performed. Further, since the feed operation rod is supported in a double-supporting manner, sufficient strength can be ensured even with a thin pipe material, and a long operable portion and high support rigidity can be obtained even with a simple bearing structure.

When the timing belt mechanism is employed, the degree of freedom in arranging the feed operation rod on the base is increased, and only a small number of lightweight and small parts need to be added. By raising the feed operation rod near the feed knobs of the second and third axes, the operability of positioning is improved. When a pair of feed knobs for the second axis and the third axis are provided, the XYZ positioning operation can be executed from any position surrounding the column with the same ease.
It is possible to take a free working position giving priority to the object to be measured and the convenience of measurement.

[Brief description of the drawings]

FIG. 1 is a front view of the overall structure of a three-dimensional shape measuring apparatus.

FIG. 2 is an enlarged view of a both-end supporting portion of a feed operation rod.

FIG. 3 is a plan view of the entire structure.

FIG. 4 is a perspective view of the three-dimensional shape measuring device.

[Explanation of symbols]

 11, 51 Surface plate 13, 53 Base 14, 54 Column 15, 55 Head 16, 56 Arm 18, 58 Pulley 21, 31 Flange 22 Bolt 23 Tension rod 24, 57A Base feed knob 25, 26 Friction roller 32 Support pipe 33 Upper part Support mechanism 35 Feed operation rod 36 Lower support mechanism 37 Timing belt 38 Pulley support 39 Tension mechanism 41 Spherical bearing 42 Nut 44 Universal joint 45 Bearing 46 Pulley 52 Linear holder 59 Measurement attachment 15A Horizontal axis guide 15B Vertical axis guide 17B Arm feed knob 17C Head feed knob 18A, 58A Wire 34A, 34B Handle 43A, 43C Brake shoe 43B, 43D Drum

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01B 5/00-5/30 G01B 21/00-21/32

Claims (3)

(57) [Claims] 1. A trajectory provided in a direction of a first axis on a surface of a surface plate.
WhatBy operator's manual operationA movable base, and the surface of the surface plate along a column erected on the base.
A head movable in the direction of a second axis perpendicular to the axis, and supported by the head,
Having an arm movable in the direction of a vertical third axis
In the original shape measuring device, standing upright on the base in parallel with the column,
A feed operating rod rotatably supported at both ends and a first shaft feed drive for urging the base along the track;
Rotation for transmitting rotation by contacting a moving member and the feed operation rod
Transmission mechanism andAnd add Rotating the feed operation rod to feed the first axis
Material can be driven Three-dimensional shape measuring device characterized by
Place. 2. The rotation transmitting mechanism includes a first pulley connected to a lower end of the feed operation rod, a second pulley connected to the feed drive member of a first shaft and disposed on a base, and a first and a second pulley. 2. A timing belt, which is hung between second pulleys, wherein the feed operation rod is erected near feed knobs of a second shaft and a third shaft arranged on the head. The three-dimensional shape measuring device according to the above. 3. The head according to claim 2, wherein a pair of feed knobs of a second shaft and a third shaft are provided by penetrating the head, and the feed knob can be operated from both sides sandwiching the head. The three-dimensional shape measuring device according to the above.