JPS6325619A - Reference shape projector - Google Patents

Abstract

PURPOSE:To highly accurately adjust the superposition of a work piece to a reference shape projected to it by constituting the titled projector with a light source to be optionally moved in the horizontal X direction, a projection part to be moved in the horizontal Y direction and the vertical direction and a light guide for expansibly coupling both the units. CONSTITUTION:The position of the projection part is adjusted in the X and Z directions by a vertical driving mechanism 9 and an unshown horizontal driving mechanism so that the center of an expanded reference shape projected from the projection part 10 coincides with the center of the projecting surface of a work piece 25 and a light source 4 is moved forward and backward on a guide 6. Since light projected from the light source 4 is led into the projection part b the expansible light guide 12 and two plane mirrors, the loss of light and the variation of the optical axis can be reduced, and the heavy light source 4 is moved only in the horizontal direction, the size of the driving mechanisms 7, 9 can be reduced. Thereby, the positional adjustment of the projection part 10 can be highly accurately attained independently of the light source 4 and the size of the device can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a 1,1 quasi-shape projection device used to confirm the shape of a workpiece by projecting a reference shape onto the workpiece being machined. .

(Prior art and its problems) In recent years, in processing processes such as hot free forging presses, as shown in FIG. A method has been developed in which processing is performed while checking the shape of the workpiece 2.

In processing using such a projection device, the following conditions must be met.

■ Processed product 2! 3 In order to superimpose the quasi-shape 3, a mechanism is required to move either the workpiece 2 or the projection device 1 in the horizontal direction J3 and vertical direction as shown by arrows A and C in FIG. (The figure does not show the case where the 1st side of the neck is moved.)

■ In order to make the reference shape 3 projected on the workpiece 2 to the desired size, it is necessary to have a mechanism B that adjusts the projection distance to a constant value or a mechanism that changes the projection magnification with high accuracy according to the projection distance. It is.

■ Considering the use in the factory, the brightness of the standard shape is 2.
000 lux or more is required, thus increasing the size and weight of the light source considerably. Therefore, the above-mentioned shift f!
In order to downsize the II locking structure, it is necessary to minimize the movement of the light source.

Incidentally, as this type of projection device, slide projectors, overhead projectors, movie projectors, and the like have been known. However, when these devices are used for the purposes described above, each of the above conditions cannot be satisfied.

(Purpose of the Invention) This invention was made to solve the above problem, and it is possible to adjust the superposition of the workpiece and the reference shape projected onto the workpiece with good viscosity, and to make the entire mechanism compact. The purpose of the present invention is to provide a reference shape projection device that can

(Means for Achieving the Object) In order to achieve the above object, the reference shape projection device of the present invention includes a light source that generates parallel rays, a light guide that guides the parallel rays from the light source, and a workpiece. A light projection device that incorporates a reduced reference shape produced based on three-dimensional drawing dimensions, irradiates the reduced reference shape with parallel light rays guided by the Lymil guide, and projects the enlarged projection light onto the workpiece. and a moving mechanism for moving the light emitting position of the light emitting part to an arbitrary three-dimensional spatial position, and the light emitting part serves as the light guide by bending parallel light rays from the light source in a predetermined direction. a plane mirror forming a polygonal optical path directed toward the polygonal optical path, and a plurality of hollow bodies each surrounding each straight optical path part of the polygonal optical path and having the plane mirrors disposed at mutual connection parts, at least one of these hollow bodies is provided. One is formed so that the hollow body can expand and contract in accordance with the movement of the light projecting section in the direction of the linear optical path section that the hollow body surrounds.

(Embodiment) FIG. 1 shows a perspective view of the appearance of a reference shape projection device in use, which is an embodiment of the present invention.

In this device, a light source 4 that generates parallel light rays is fixed on a base 5, and a forward/backward guide rail 6 is arranged on the lower surface of the base 5 in a predetermined horizontal direction as shown by arrow Y in FIG. .

A forward/backward drive mechanism 7 is movably connected to the forward/backward guide rail 6, and a vertical guide rail 8 is fixed to the forward/backward drive mechanism 7 in the vertical direction shown by arrow Z in the figure. A vertical drive mechanism 9 is attached to the vertical guide rail 8 so as to be movable up and down, and a light projector 10 is fixed to the vertical drive side 9.

On the other hand, on one side of the light source 4, a housing 11 for guiding parallel light rays is provided to protrude in the horizontal direction indicated by the arrow X in FIG. The light source 4 and the light projecting section 10 are connected by a light guide 12 that surrounds the housing 11, thereby guiding parallel light rays to the light projecting section 10.

The light guide 12 has a casing 13 provided in the forward/backward drive structure 71 as a relay part, and a light guide 12 that extends in the forward/backward direction Y between the casing 13 and the parallel ray guiding casing 11 of the light source 4. 1iQIi1 section 14, and a second chain y section 15 extending in the vertical direction between the housing 13 and the light projecting section 10. Both the part 14 and the second lens barrel part 15 are arranged concentrically with respect to their axes as shown in the side view in FIG. Consisting of cylindrical casings 14a, 14b, 15a, and 15b, the first lens barrel A14 extends in the advance/retreat direction Y, and the second mirror 1
The feed section 15 is designed to be able to expand and contract in the vertical direction Z.

As shown in the cross-sectional view in FIG.
are arranged so as to form an angle of 45 degrees with respect to both the horizontal direction It is configured to reflect in the Y direction. on the other hand,
At the connecting portion of the relay casing 13 with the first VL trunk 14, a second plane mirror 17 is provided, as shown in FIG. and 5 to 45
The second plane mirror 17 is arranged such that the angle of the second plane mirror 17 is 15 degrees, and the second plane mirror 17 reflects the parallel light beam reflected by the first plane mirror 16 in the axial direction of the second barrel section 15, that is, in the vertical direction Z. ing. In other words, 1st. second plane &i16,1
7 constitutes a bent line optical path that first bends the parallel light beam projected from the light source 4 in the horizontal direction Each of the planes 1f116.17 is connected to the housing 1 by means of fine adjustment screws 20, 21 via supports 18.19, respectively.
The tightening is fixed at 1.13, and the above fine adjustment screw 20.21
The arrangement angle can be finely adjusted by adjusting the tightening of the parts. In addition, the lower end of the barrel 15b of the second lens barrel 15 and the upper end of the light emitting light 81110,
As shown in the sectional view in FIG. 4, sealing flanges 22 and 23 are formed respectively, and a dustproof seal 24 is interposed between these flanges 22 and 23. Between the cylinder body 15b and the cylinder body 15a of the second mirror part 15, between the cylinder body 15a and the relay housing 13, between the relay housing 13 and the cylinder body 11b of the first lens barrel part 14, the first mirror ISi Between the cylindrical body 14b of the section 14 and the solid 14a, and between the solid 14a and the parallel ray deriving housing 1
1 is also formed with the same retainer as above (14 structures).

Inside the light projecting section 10, a reduced reference shape 26, which is prepared in advance as shown in FIG. 5 in correspondence with the workpiece 25 (shown in FIG. 1), a projection lens 27, and a plane mirror 28 are arranged. , the reduced reference shape 26 is irradiated with a parallel light beam guided to the light projector 10 via the light guide 12, the reduced reference shape 26 is enlarged by the projection lens 27, and the enlarged projection light is reflected by the plane tA28. As shown in FIG. 1, the light is projected onto the projection surface of the workpiece 25. In FIG. 5, the reduced reference shape 26. Projection lens 27° plane mirror 28
Although an example is shown in which they are arranged in the order of
．． They may be arranged in the same order as the projection lenses 27. The reduction reference shape 26 is obtained by determining a two-dimensional shape to be projected from the three-dimensional drawing dimension of the workpiece 25, taking into consideration the depth of the workpiece 25 and the position of the projection center, and then calculating the distance from the light projecting unit 10 to the projection surface. The dimensions are calculated by multiplying the projection distance by the reduction ratio obtained from the projection magnification. Specifically, the seventh
As shown in the figure, the projection origin O and each side of the three-dimensional shape of the workpiece 25 are connected, and the reduced reference shape 26 is placed on a plane with a distance 1ipido where the ratio d/d1 to the projection distance d1 matches the reduction rate.
is making.

Further, the base 5 on which the light source 4 is fixed is configured to be movable in the horizontal direction X by a horizontal layer lJJ mechanism (not shown). That is, light source 4. Light guide 12.
The entire light projecting section 10 can be moved integrally in the horizontal direction X by the horizontal drive mechanism.

Next, the operation of projecting the reference shape onto the workpiece 25 using this device will be explained.

First, as shown in FIG. 1, this apparatus is installed so that its light projecting section 10 faces the projection surface of the workpiece 25. And a vertical drive mechanism 9 and a horizontal drive (not shown)! 71 mechanism is operated to move the light projector 10 in the horizontal direction Adjust the position. In this operation, the second mirror 1 body 15 of the light guide 12 is configured to be extendable and retractable in the vertical direction Z by the plurality of cylinders 15a and 15b, so that the above position adjustment is achieved. Further, the forward/backward drive mechanism 7 is operated to adjust the position of the light projector 10 in the forward/backward direction Y so as to match the projection distance set during the production of the reduced reference shape 26. In this operation, the light guide 1 including the light projecting section 10
The relay housing 13 of the second mirror 1 and the body 15 of the second mirror 1 are connected to the light 11
! The first lens barrel section 14 of the lie 1 to guide 12 also has a plurality of cylinder bodies 14a.
, 14b, so that the position adjustment described above is achieved.

The parallel light rays generated by the light source 4 are guided to the light projection unit 10 through the light guide 12 as described above, but at this time, the plane m forming a polygonal optical path in the lie 1-guide 12
Since there are only two light guides 16 and 17, the loss of light in the light guide 12 can be suppressed to a small level. In addition, each of these plane mirrors 16 and 17 is built in the parallel ray guiding casing 11 fixed to the light source 4 side and the relay casing 13 fixed to the advancing/retracting drive mechanism 7, so that the light guide 12
Fluctuations in the optical axis can also be kept small. Furthermore, since the light source 4, which is large in size and weight, can only be moved horizontally, the forward/backward movement J3 and the vertical drive mechanisms 7, 9 can be downsized.

Note that in this embodiment, the first lens barrel section 14. of the light guide 12. Although a telescopic cylinder structure is employed to make the second lens barrel section 15 expandable and retractable, the structure is not limited to this, and a bellows structure or the like may be employed. It is also possible to configure the housing 11 to be expandable and retractable, and in this case, the light source 4
There is no need to move it at all. The spatial arrangement of the polygonal optical paths is arbitrary.

(Effects of the Invention) As described above, according to the reference shape projection device of the present invention,
Since the predetermined straight optical path section of the light guide that guides parallel light from the light source to the iQ light section is expandable and retractable, the position of the light projecting section can be adjusted in the direction of the straight optical path section independently of the light source, making it possible to adjust the overall position. Not only can the mechanism be made smaller, but the accuracy of position adjustment can also be improved.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a reference shape projection device according to an embodiment of the present invention, showing the state in which it is used, Fig. 2 is a side view of the light guide, and Fig. 3 is a view taken along the line A-A in Fig. 2. Fig. 4 is a sectional view taken along the B-BFil arrow in Fig. 2, Fig. 5 is a diagram of the arrangement of parts in the light projecting section, and Fig. 6 shows a modification of the arrangement of parts in the light projecting part. FIG. 7 is an explanatory diagram showing a method for producing a reduced reference shape;
FIG. 8 is an explanatory diagram showing a method of performing processing by projecting a reference shape onto a workpiece using a reference shape projection device. 4... Light source, 7... Advance/retreat drive mechanism, 9
...Vertical drive mechanism, 10... Light projecting section, 12...
・Light guide, 14... Part 1111i, 14a
, 14'o...cylindrical body, 15-...2nd tJt I)
] part, 15 a, 15 b-n body, 16.17-...
Plane mirror, 26...reduced reference shape

Claims (1)

[Claims] (1) A light source that generates parallel rays, a light guide that guides the parallel rays from this light source, and a reduced reference shape created based on the three-dimensional drawing dimensions of the workpiece are built in, and the light guide is guided by the light guide. A light projecting section that irradiates the reduced reference shape with parallel light beams and projects the enlarged projection light onto the workpiece, and a moving mechanism that moves the light projecting position of the light projecting section to an arbitrary three-dimensional spatial position. The light guide includes a plane mirror that forms a polygonal optical path that bends the parallel light rays from the light source in a predetermined direction and directs them toward the light projector, and a plane mirror that separately surrounds each linear optical path portion of the polygonal optical path and separates each other from each other. a plurality of hollow bodies in which the plane mirrors are disposed in the connecting portion,
A reference shape projection device characterized in that at least one of these hollow bodies is formed so as to be able to expand and contract in accordance with the movement of the light projecting unit in the direction of the straight optical path portion that the hollow body surrounds.