JPS6324215A - Reference shape projector - Google Patents

Abstract

PURPOSE:To adjust the position of a projection part independently of a light source within a range where a light guide can be deformed and to miniaturize the whole position adjusting mechanism deforming the light guide for leading parallel light from the light source to the projection part without affecting the guide of the parallel light beams so as to optionally refract. CONSTITUTION:Parallel light beams generated from the light source 4 are led into the projection part 10 through the light guide 12. The direction of the parallel light beams in the light guide 12 are changed by the rotation of plane mirrors 20-24 in accordance with the rotation of respective barrels 11, 16 and respective intermediate barrels 13-15 of the light guide 12 and the parallel light beams are always parallel with the axes of the barrels 11, 16 and the intermediate barrels 13-15. Even if the light guide 12 is optionally expansibly deformed in accordance with the movement of the projection part 10, the parallel light beams from the light source 4 are led into the projection part 10 with the parallel state. Since the optical length of the light guide 12 is kept at an always constant value even if the light guide 12 is expansibly deformed, the light quantity obtained up to the arrival at the projection part 10 is not changed by the expansible deformation of the light guide 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a reference shape projection device used to project a reference shape onto a workpiece being processed and confirm the shape of the workpiece.

(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, it is particularly necessary that the following conditions be satisfied.

■ In order to overlap the workpiece 2 and the reference shape 3, a mechanism is required to move either the workpiece 2 or the projection device 1 in the horizontal and vertical directions as shown by arrows A and C in FIG. (Figure 8 shows the case where the projection device 1 side 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, in order to downsize the moving mechanism described above, it is necessary to suppress the movement of the light source to the necessary minimum.

Incidentally, as this type of projection apparatus, 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-mentioned problems, and it is possible to accurately adjust the superposition of the workpiece and the reference shape projected onto the workpiece, 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 a light projecting unit that incorporates a reduced reference shape produced based on dimensional drawing dimensions, irradiates the reduced reference shape with parallel light rays guided by the light guide, and projects the enlarged projection light onto the workpiece; , a moving mechanism for moving the light projection position of the light projection unit to an arbitrary three-dimensional spatial position, and a linear hollow body on the starting end side that guides parallel light rays from the light source as the light guide; A linear hollow body on the terminal side that introduces parallel light rays to the light projecting part and whose axis is perpendicular to the axis of the other side and rotatable in a plane perpendicular to the axis of each of the hollow bodies. A plurality of linear hollow bodies connected between each of the hollow bodies, and a polygonal line disposed at the connecting portion of each of these hollow bodies to sequentially bend parallel light rays from the light source by 90 degrees and direct them to the light projecting part. A plane mirror forming an optical path is provided, and the light projecting section is configured to be able to move independently in a predetermined direction by rotation of each linear hollow body in the middle of the light guide.

(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 a4 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 an arrow Z is attached to this forward/backward drive mechanism 7.
A vertical guide rail 8 is fixed in the vertical direction indicated by .

A vertical drive mechanism 9 is suspended from the vertical guide rail 8 so as to be movable up and down, and a light projector 10 is fixed to the vertical drive mechanism 9.

On the other hand, on one side of the light a4, there is a linear cylindrical body for guiding parallel light rays in the horizontal direction indicated by the arrow X in FIG. 11 is provided protrudingly, and the light guide 12 includes this cylindrical body 11.
The light source 4 and the light projecting section 10 are connected by this, and the parallel light beams are thereby guided to the light projecting section 10.

The lens barrel of the light guide 12 is a cylindrical body 1 on the light source 4 side.
1 and a linear first intermediate cylinder 13 connected at right angles to the cylinder body 11 and rotatable around the axis of the cylinder body 11; A second intermediate cylindrical body 14, which is also linear, is connected in parallel with the body 11, and a second intermediate cylindrical body 14, which is connected at right angles to the other end of the second intermediate cylindrical body 14, rotates around the axis of the second intermediate cylindrical body 14. a third intermediate body 15 which is freely movable; and a cylindrical body 1 on the light source 4 side on the light projecting section 10 side;
1, the linear cylinder 1 is connected to the other end of the third intermediate cylinder 15 so as to be rotatable about its axis.
It consists of 6. The cylindrical body 11 on the light source 4 side has two cylindrical parts 11a and 11b rotatably connected via a bearing 17, as shown in the cross-sectional view in FIG. The first center is centered on its axis.
Rotation of the width cylinder 13 is allowed. Further, the second intermediate cylindrical body 14 also has two cylindrical portions 14 as shown in a cross-sectional view in FIG.
a and 14b are rotatably connected via a bearing 18, which allows the third intermediate cylinder 15 to rotate about its axis with respect to the second intermediate cylinder 14. . The connection structure between the cylindrical body 16 on the side of the light projector 10 and the third intermediate body 15 is also the same as the connection structure between the second intermediate body 14 and the third intermediate body 15, and is shown in parentheses in FIG. As shown by the symbols, the cylinder 16 has two cylinder parts 16a and 16b connected to the bearing 1.
The third intermediate cylindrical body 15 is rotatably connected to the cylindrical body 16 via the cylindrical body 9, thereby allowing the third intermediate cylindrical body 15 to rotate about its axis relative to the cylindrical body 16.

On the other hand, as shown in FIG. 2, a first plane mirror 20 is provided at the connection part between the cylinder 11 and the first intermediate cylinder 13 on the side of the light source 4, so that a first plane mirror 20 is connected to each axis of the cylinder 11 and the first intermediate cylinder 13. They are arranged at an angle of 45 degrees with respect to the center, and are configured so that the plane it20 of the parallel light source generated by the light source 4 is directed in the direction of the axis of the first intermediate cylindrical body 13. In addition, at the connection part between the first width cylinder 13 and the second intermediate cylinder 14, there is a A second plane mirror 21 is arranged so as to form an angle of 45 degrees with each other, and the second plane mirror 21 directs the parallel light beam reflected by the first plane mirror 20 in the direction of the axis of the second intermediate cylinder 14. Designed to be reflective.

Furthermore, a third plane mirror 22 is provided at the connection portion between the second width cylinder 14 and the third intermediate cylinder 15 with respect to each axis of the second intermediate cylinder 14 and the third intermediate cylinder 15. They are arranged so as to form an angle of 45 degrees, and the second plane mirror 21
The third plane m22 is configured to reflect the parallel light rays in the direction of the axis of the third intermediate cylinder 15.

Similarly, the connection part between the third intermediate cylinder 15 and the cylinder 16 on the side of the light projecting part 10, and the connection part between the second cylinder 16 and the light projecting part 10 are also shown in parentheses in FIG. As shown, the 4th. Fifth plane mirrors 23, 24 are arranged at an angle of 45 degrees, and the parallel light beams reflected by the third plane mirror 22 are transferred to the fourth plane mirror 23, 24. The fifth plane tff23.24 is the cylinder 16
The light is reflected in the axial direction of the light emitting unit 10 and further in the axial direction of the light projecting unit 10 . That is, the parallel light beams previously projected from the light source 4 in the horizontal direction
A polygonal optical path is formed in which the optical fiber is sequentially bent by 90 degrees each time it passes through the cylinder 16. Each of the above plane mirrors 20 to 24
are respectively fine adjustment screws 30 through two supports 25 through
34 is tightened and fixed to the cylinder 11 and each of the intermediate cylinders 13 to 15, and by adjusting the tightening of the fine adjustment screws 30 to 34, the arrangement angle thereof can be finely adjusted.

In the light projecting section 10, a reduced reference shape 36, which is prepared in advance as shown in FIG. 4 in correspondence with the workpiece 35 (shown in FIG. 1), a projection lens 37, and a plane mirror 38 are arranged. , the reduced reference shape 36 is irradiated with a parallel light beam guided to the light projector 10 via the light guide 12, the reduced reference shape 36 is enlarged by the projection lens 37, and the enlarged projection light is reflected by the plane mirror 38. As shown in Figure 1, the workpiece 3
It is configured to project light onto the projection plane No. 5. In FIG. 4, the reduced reference shape 36. Although an example is shown in which the projection lens 37.degree. plane mirror 38 is arranged in this order, the arrangement is not limited thereto.For example, as shown in FIG. They may be arranged in the same order as the projection lenses 37. The reduced reference shape 36 is obtained by determining a two-dimensional shape to be projected from the three-dimensional drawing dimensions of the workpiece 35, taking into consideration the depth of the workpiece 35 and the position of the projection center, and then determining the two-dimensional shape from the light projection 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, as shown in FIG. 6, the distance d connects the projection origin O and each side of the three-dimensional shape of the workpiece 35, and the ratio d/d of the projection distance d1 matches the reduction ratio. A reduced reference shape 36 is created on the plane.

The base 5 on which the light source 4 is fixed is configured to be movable in the horizontal direction by a horizontal drive mechanism (not shown). That is, light source 4. Light guide 12. The entire light projecting unit 10 is movable as a unit in the horizontal direction X by the horizontal drive rock structure.

Next, the operation of projecting a glue single shape onto the workpiece 35 using this apparatus 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 35. Then, the vertical drive mechanism 9 and the horizontal drive mechanism (not shown) are operated so that the light projection 8 ! 110 in the horizontal direction X and vertical direction 7. During this operation, the cylindrical body 11° 16 of the light guide 12 and each intermediate cylindrical body 13 to 15 rotate, and the intermediate part of the light guide 12 bends and stretches in a plane perpendicular to the horizontal direction X. , vertical alignment is achieved. Further, the advance/retreat drive mechanism 7 is operated to match the projection distance set during the production of the reduced reference shape 36,
Light projection? The position of j510 in the forward and backward direction Y is adjusted. Also in this operation, the intermediate portion of the light guide 12 bends and stretches, thereby allowing the light projecting section 10 to move in the forward/backward direction Y. In the above operation, light guide 1
The light projector 10 moves widely in the advance/retreat direction Y and the vertical direction Z over almost the entire range within which bending/extension is allowed.

In particular, the light projecting unit 10 can be easily moved to a position close to the light source 4. In this device, the light source 4 needs to be moved only when the light projector 10 is moved in the horizontal direction.

The parallel light rays generated by the light 'rA4 are guided to the light projection unit 10 through the light guide 12 as described above, but each cylinder 11.16 of the light guide 12 and each intermediate cylinder 1
3 to 15, the plane mirrors 20 to 24 rotate, and the parallel rays inside the light guide 12 also change direction, and the parallel rays always connect to each of the cylinders 11.16 and the intermediate cylinders 13 to 15.
is parallel to the axis of Therefore, no matter how the light guide 12 bends and stretches as the light projector 10 moves, the parallel light beams from the light source 4 are guided to the light projector 10 while remaining parallel. Furthermore, even if the light guide 12 is bent or stretched, the optical path length of the light guide 12 is always kept constant, so the amount of light that reaches the light projector 10 will not change as the light guide 12 is bent or stretched. do not have. Therefore, the structure of the collimator that is located in the light source 4 and transmits parallel light beams can be simple.
When the parallelism of the parallel light rays in the light guide 12 decreases as shown in FIG. 7 under conditions where the optical path length up to zero changes, as shown in FIG. 36, the reduced reference shape 3
This results in a change in the amount of light that reaches 6.

It is also possible to make the light guide 12 bendable and extensible in three-dimensional space by changing the number and rotating direction of the intermediate solids, and in this case there is no need to move the light source 4 at all.

(Effects of the Invention) As described above, according to the reference shape projection device of the present invention,
The light guide that guides parallel light rays from the light source to the light projector can be bent and expanded without affecting the guide of the parallel light rays, so the light projector can be made independent of the light source within the deformable range of the light guide. The position can be adjusted, and the overall position is U4! ! ! 1
Effects such as being able to downsize one structure and improving the precision of position adjustment can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing the use state of a reference shape projection device which is an embodiment of the present invention, FIGS. 2 and 3 are new views showing an enlarged part of the light guide, and FIG. The figure is a diagram showing the arrangement of parts inside the light projecting section, FIG. 5 is a diagram showing a modification of the arrangement of parts inside the light projecting section, FIG. 6 is an explanatory diagram showing a method for producing a reduced standard shape, and FIG. 7 is a diagram showing the parallelism of parallel rays. FIG. 8 is an explanatory diagram showing a change in the amount of irradiated light when there is a change in the optical path length when the optical path length is low. FIG. 4...Light source, 7...Advance/retreat tjJR structure, 9...Vertical drive mechanism, 10...Light projection part, 12
...Light guide, 11.16...Cylinder, 13~
15... Intermediate solid, 20-24... Plane mirror, 36.
・Reduced standard 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 linear hollow body on a starting end side that guides parallel light rays from the light source;
a linear hollow body on the terminal side that introduces the parallel light rays to the light projecting section; and an axis that is perpendicular to the axis of the other side and rotatable in a plane perpendicular to the axis of each of the hollow bodies. A plurality of linear hollow bodies are connected between the hollow bodies, and parallel light rays from the light source are arranged at the connecting portions of the hollow bodies and are sequentially bent by 90 degrees and directed toward the light projecting part. A reference shape projection device comprising: a plane mirror forming a polygonal optical path;