JPH0578764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a three-dimensional measuring device for the outer surface of an object having a three-dimensionally complex shape that is difficult to measure by contact.

(Prior art) For example, it is difficult to measure the outer surface of a human body or animal, or the outer surface of an object with a three-dimensionally complex shape such as a soft rubber product, a thin plate product, or a thin wire product. Therefore, conventionally, the external shape has been restored mainly by hand and visual inspection.

(Problem to be solved by the invention) Therefore, for example, the production of human body statues has traditionally been done manually by specialized technicians, resulting in poor production efficiency and a tendency to produce defective products. There was a problem.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, the object to be measured can be installed on the center of the base frame, and the distance to the outer surface of the object to be measured can be set at the center of the base frame. A non-contact measuring device such as a laser rangefinder is placed around the object to be measured so that it can rotate and move up and down, and the measurement point is moved vertically at a constant pitch while rotating on the circumference. A non-contact three-dimensional measurement device for the outer surface of an object is constructed by setting the measurement value at each equally divided point on the circumference of the trajectory and electrically recording the measurement value at each measurement point.

(Function) According to the device of the present invention configured as described above, all the distances to a large number of measurement points distributed on the outer surface of the object to be measured are measured, and the measured values are recorded electrically. By inputting this record directly into the machine tool, an object having the same shape as the object to be measured can be obtained.

Furthermore, by using the data processed by computer processing the above-mentioned records as necessary, enlarged or reduced objects can be easily obtained. can be made accurately. Therefore, especially when casting using expensive materials, the wall thickness of each part can be made uniform and minimized, so that the maximum effect can be achieved.

(Embodiment) An embodiment of the present invention for manufacturing a bust of a human body will be described below with reference to the drawings.

In the figure, 1 is a base frame whose planar shape is rectangular as shown in FIG. 2, and 2 is a plurality of casters for movement provided on the lower surface of the base frame. 3 is a cover plate provided on the base frame 1 with an appropriate space, 4 is a chair installed on the center of this cover plate 3, 5 is a handle for horizontal movement, and 6 is a handle for vertical movement. It is.

Supports 7 are placed on the front and rear of the base frame 1, respectively.
are planted, and a beam 8 is spanned between the upper ends of these supports 7. Note that 9 shown in FIG. 2 is a stay provided on one side of the support column 7. Reference numeral 10 denotes sleeves provided on the front and rear columns 7 so as to be movable up and down, and a ring-shaped rail 11 is fixed to the inside of these sleeves 10. 12 is a bracket protruding from one side of the sleeve 10, and 13 is a nut fixed to this bracket 12. Reference numeral 14 denotes a screw shaft that is screwed into the nut 13. This screw shaft 14 descends along the support column 7, passes through the cover plate 3, and has its lower end pivotally supported by the base frame 1. Reference numeral 15 denotes a motor with a brake for rotating the front and rear screw shafts 14 to raise and lower the sleeve 10, and this motor 15 is fixed to an index unit 16 installed on the base frame 1. Reference numeral 16a designates output shafts protruding from the front and rear of the index unit 16, which are connected to the horizontal shaft 18 via couplings 17, respectively. 19 are the bearings of these horizontal shafts 18, 2
0 is a bevel gear fixed to the horizontal shaft 18, and 21 is a bevel gear meshing with the bevel gear 20, which is fixed to the lower end of the screw shaft 14.

Reference numeral 22 denotes a rotary sleeve vertically provided so as to be freely rotatable via a bearing 23 provided on the beam 8, and this sleeve 22 is located at the center of the ring-shaped rail 11. 24 is a variable speed motor with a brake for driving the rotating sleeve and is fixed to the beam 8. 25 is a pulley fixed to the output shaft of the motor 24, 26 is a pulley fixed to the rotating sleeve 22, and 27 is a timing belt that is stretched around these pulleys 25 and 26.

Reference numeral 28 designates a bifurcated rotating frame that is slidable in the axial direction relative to the rotating sleeve 22 and rotates together with the rotary sleeve 22, and 28a is a boss portion that fits into the rotating sleeve 22. 29 is a rotating frame 28
A guide roller 30 that is in rolling contact with the upper surface of the ring-shaped rail 11 by a carrier provided at both leg ends of the
Guide roller 31 in rolling contact with the lower surface of rail 11
and a guide roller 32 which is in rolling contact with the inner circumferential surface of the rail 11, are each rotatably supported.

Reference numeral 33 is a non-contact measuring device such as a laser rangefinder installed on one of the carriers 29, and this measuring device 33 measures the distance to each measurement point on the outer surface of the object to be measured, and also measures the measured value. can now be recorded electrically. 34 is a cover provided inside the rotating frame 28.

Reference numeral 35 denotes an elevating rod that is movable up and down within the rotating sleeve 22, and a head fixing pad 36 is provided at the lower end of this rod 35. Reference numeral 37 denotes a clamper boss fitted to the lifting rod 35 on the bearing 23, and by rotating a lever 38, the lifting rod 35 can be fixed and released. 39 is an operating rod connected to the lever 38, and 40 is its guide. Also 41 (second
(see figure) is the control panel.

FIG. 3 shows an example of a numerically controlled machine tool for processing a restored object by inputting data obtained by the device of the present invention. 42 is a base frame thereof, and 43 is a machine tool on the bed of this frame. A slide table is slidably mounted, 44 is an index unit installed on the slide table 43, 45 is a column installed on one side of the base frame 42, 46 is a cutting unit that moves up and down along this column 45, 47 is a cutter.

Next, the operation of the apparatus of the present invention constructed as described above will be explained.

As shown in FIG. 1, a person 48 who intends to have a bust taken is seated on the chair 4 with the sleeve 10 raised. In this case, the lifting rod 35 is raised so as not to get in the way, and the handles 5 and 6 are adjusted if necessary so that the head of the seated person 48 is positioned directly below the pad 36. When the adjustment is completed, lower the lifting rod 35, place the pad 36 above your head, and then pull down the operating rod 39 to rotate the lever 38 in the direction of arrow A in FIG. The lifting rod 35 is fixed.

If the control panel 41 is operated in this state to activate this device, the motor 24 rotates, and the rotating frame 28 rotates via the pulley 25, timing belt 27, pulley 26, and rotating sleeve 22. .

On the other hand, since the motor 15 on the base frame 1 also rotates, the rotation is transmitted to the output shafts 16a on both sides via the index unit 16, and is further transmitted to the screw shaft 14 via the coupling 17, the horizontal shaft 18, and the bevel gears 20 and 21. It is transmitted to As the threaded shaft 14 rotates, the sleeve 10 descends from the position shown in FIG.
The ring-shaped rail 11, which is fixed integrally with 0, is lowered little by little.

As mentioned above, when the rotating frame 28 rotates, the carrier 29 also rotates integrally, and each guide roller 30 supported by this carrier 28,
31 and 32 are in rolling contact with the ring-shaped rail 11, the carrier 29 rotates horizontally and gradually descends as the ring-shaped rail 11 descends.

Also, since the non-contact measuring device 33 installed on one of the carriers 29 starts operating at the same time as this device starts operating, measurements can be taken at each measurement point that is equally divided around the circumference with a fixed vertical pitch. Vessel 3
3 to the outer surface of the human body 48 that is the object to be measured, and the measured value is electrically recorded.

When the sleeve 10 and rotating frame 28 reach the position indicated by the two-dot chain line in FIG. 1 by continuing the above-described operation, the operation is stopped, and the lowered members are raised to return to their original positions to begin measurement. end.

Next, in order to restore the image based on the data obtained as described above, the data recorded in the numerically controlled machine tool as shown in FIG. Material 4
Set 9 and operate this machine. In this way, the material 49 rotates as shown by arrow B, the cutter 47 rotates as shown by arrow C, moves forward and backward based on the input data, and moves from top to bottom as shown by arrow D. By moving little by little, the workpiece material 49 can be cut to create an image having the same shape as the human body 48.

In this case, it is also possible to obtain an enlarged or reduced image by applying the measurement data to a computer and processing it, so when making hollow casting products, the mold and core can be made accurately. be able to.

(Effects of the Invention) According to the device of the present invention configured as described above, all distances to a large number of measurement points distributed on the outer surface of the object to be measured are measured, and the measured values are electrically recorded. Therefore, by inputting this record directly into the machine tool, an object having the same shape as the object to be measured can be easily obtained. Therefore, even objects with complex three-dimensional shapes can be accurately restored industrially without requiring special skills as in the past.

Furthermore, by using the data processed by computer processing the above-mentioned records as necessary, it is possible to easily obtain enlarged or reduced objects, so that molds and their cores can be easily and can be made accurately. Therefore, especially in the case of casting using expensive materials, the wall thickness of each part can be made uniform and minimized, so that the maximum economical effect can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of the apparatus of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an elevational view of the restoration machine tool. 1... Base frame, 4... Chair, 7... Support, 8... Beam, 10... Sleeve, 11...
Ring-shaped rail, 15...Motor with brake,
22... Rotating sleeve, 24... Variable speed motor with brake, 28... Rotating frame, 29... Carrier, 33... Non-contact measuring device, 35... Lifting rod, 36... Pad.

Claims (1)

[Claims] 1. The object to be measured can be placed on the center of the base frame, and a non-contact measuring device such as a laser rangefinder that measures the distance to the outer surface of the object can be rotated around the object. It is arranged to be movable and can be raised and lowered, and its measurement points are set at equal division points on the circumference of a locus that moves at a fixed pitch up and down while rotating on the circumference, and the measured values at each measurement point are electrically measured. A non-contact three-dimensional measurement device for the outer surface of an object, characterized in that it records information.