JPS5890446A - Positioning device and manufacture thereof - Google Patents

Abstract

PURPOSE:To make it possible to highly accurately position without large force by mounting the first and second members having a screw part and a tapered part engaged with each other on the relatively movable first and second structures, respectively. CONSTITUTION:A box shaped slider 49 as the first structure is movably supported on slider guide rails 46, 47, and on this slider 49 a box shaped spindle support 51 as the second structure is inclinably supported via an angle measuring means 50. On the underside of the slider 49, a positioning device 210 for positioning the spindle support 51 to a prescribed angle is provided. Positioning is performed keeping a state where an engaging shaft being the first member is coupled with an engaging bush 214 being the second member, so that the accuracies of the slider 49 and the spindle support 51 for zero return range within 1mum, enabling the high precission rapid operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positioning device that maintains a relatively movable first structure and a second structure in a predetermined positional relationship, and a method for manufacturing the same.

Conventionally, a relatively movable first . The positioning device for holding or resetting the second structure in a predetermined positional relationship (returning to the origin) may include a pair of latches that can be engaged with each other, or a tapered shaft and a tee/four hole. Are known. However, these have poor accuracy when returning to their origin, especially in the latter case, unless sufficient pressing force is applied, both the teeth and amounts will not engage, and the
This caused bends and other deformations in the holes, etc., and it could not be used as a positioning device for returning a precision measuring machine to its origin.

The purpose of the present invention is to enable accurate positioning with a simple structure,
Another object of the present invention is to provide a positioning device that does not interfere with the movement of a relatively movable structure when positioning is released, and a method for manufacturing the same.

The device of the present invention has a first screw thread and a tapered portion that are engaged with each other. The second member is connected to the relatively movable first member. By attaching each to the second structure, the fixing by the threaded part and the guiding action by the tenor and part allow accurate positioning without requiring a large force. By providing a release means that maintains the separation state of the second member, it is possible to prevent the two members from coming into contact with each other during movement of the structure, thereby achieving the above object.

The manufacturing method of the present invention includes the following steps in manufacturing the device: 1. In a state in which the second member is connected at each threaded portion and each chi/weight portion and assembled integrally, one of both members is movably attached to one of the structures, and one of the two members is or the other is fixed to the structure of the other, thereby ensuring accuracy when the two members are recombined.

An embodiment in which the present invention is applied to a coordinate measuring machine will be described below with reference to the drawings.

In the overall structural diagram of FIG. 1, a base 21 consisting of a stone surface plate formed into a substantially rectangular parallelepiped has a plurality of screw holes 22 for attaching the object to be measured on its upper surface, and a front edge perpendicular to the longitudinal direction. Each has a handle 23 having an angled cross-section on its end surface. A plurality of holes 24 are provided on both left and right sides of this base 21, and although these holes 24 are not shown, they are also provided on the opposite side of the base 21 in FIG. They are arranged in series in the Y-axis direction. Support shafts 25 are fixed to these holes 24 via adhesive, and these bases 210
One guide rail 31, 32 constituting a Y-axis guide section is removably attached to each of the support shafts 25 on both sides. These guide rails 31, 32 are connected to the base 2
It is formed to be longer than the length in the longitudinal direction (Y-axis direction) of the base 21, and is provided below the upper surface of the base 21, parallel to this upper surface, and protruding from the side surface of the base 21.

In this case, the fact that the guide rails 31.32 are below the top surface of the base 21 means that the top surface of the guide rails 31.32 is at the same or lower position than the top surface of the base 21. In addition, both guide rails 31 and 32 have both sides of the cylinder cut down in parallel so that the cross-sectional shape perpendicular to the longitudinal direction has a substantially oval shape consisting of a circular arc portion and a straight portion, and A concave groove is formed on the outer surface of the guide rail 31 at the center front side along the longitudinal direction of the guide rail 31 over almost the entire length thereof. A scale 33 is pasted in this groove, and the scale 33 is, for example, a reflective scale having vertical graduations on the μm order formed on the surface of a stainless steel plate.

The guide rails 31 and 32 on both sides are provided with prismatic supports 41.
．． 42 in the longitudinal direction (X
It is supported so as to be movable along the axial direction. A detector (not shown) is housed in one of the pillars 41 and 42 on both sides, and the amount of movement of the pillar 41 can be detected by this detector and the scale 33. A horizontal member 43 made of one round bar is still installed midway between the pillars 41 and 42 on both sides in order to set the interval in the X-axis direction between the inner pillars 41 and 42 to a predetermined dimension. Between the upper ends of the struts 41 and 42, there are connecting portions 4, respectively.
4.45, a slider guide rail 46, 47 consisting of two round bars and a slider fine movement rail 48 consisting of one round bar are perpendicular to the guide rail 31, 32, and the base 2
A box-shaped slider 49 as a first structure is attached to these slider guide rails 46 and 47 in a direction parallel to the upper surface of the slider guide rail 1, that is, in the X-axis direction. A box-shaped spindle support 51 as a second structure is supported on the slider 49 so as to be movable in the X-axis direction along the Y-axis, and a box-shaped spindle support 51 as a second structure is supported on the slider 49 so as to be tiltable about the Y-axis. A spindle 52 is supported on the spindle support 51 so as to be slidable in the direction of its central axis, and a measuring element 53 is attached to the lower end of the spindle 52. 52 is set so that it can move in exactly two axes directions (up and down) when the inclination of the spindle support 51 is zero, thereby allowing the slider 49 to move in the X-axis direction and the supports 41 and 42 to move in the X-axis direction. In conjunction with the movement in the direction, the measuring head 53 is made to be able to move arbitrarily in the x, y, and z axes directions perpendicular to each other with respect to the base 21 and the object to be measured 54 placed on the base 21. Furthermore, the measuring element support member 40 is supported by these pillars 41 and 42, the horizontal member 43, the connecting parts 44 and 45, the slider guide rails 46 and 47, the slider 49, the angle measuring means 50, the spindle support body 51, and the spindle 52. is configured.

As shown in an enlarged view in FIG. 2, the connecting portions 44, 45 are connected to connecting blocks 111, each having a protrusion formed on the side surface.
112 respectively, and these connecting blocks 111.
112 is connected to each support column 41.4 via an adjustment means (not shown).
It is supported by 2. This adjustment means is for each of the pillars 41
．． It consists of a positioning bushing etc. which is screwed into the slider guide rail 46, 42 so that the position can be adjusted, and the position of the slider guide rail 46, 47 and, in turn, the probe 53 can be adjusted in the X, Y and two axis directions.

Further, the structure of the connecting portion 44 is as shown in FIG.
The connecting block 111 is formed to be narrower than the spacing between the front and rear side walls of the support column 41 and is inserted with a gap between the both side walls.
Bushes 113 and 114 are attached to the block 111 by penetrating them in the X-axis direction and into which the small diameter end portions of the slider guide rails 46 and 47 are inserted, and a portion is inserted into each of these bushes 113 and 114. bushings 115, 116 with flanges to which the boxwood portions are fixed, and screwed into the ends of the guide rails 46, 47 through these bushings 115, 116, respectively.
6° 47 and connection block 111? )
117, 118, and the adjustment means (not shown).

Note that the other connecting portion 45 is connected to the connecting block 11 in FIG.
2 is shown, but the other structure is the same as that of the connecting portion 44, and the position adjustment in the x, y, and z axis directions can be performed in the same way.

In FIGS. 2 to 7, both the connecting portions 44 and 45
The slider fine movement rail 48, which is hooked between the upper ends of the connecting blocks 111 and 112, is movable in its axial direction, and the portion inserted into the connecting block 111 is provided with a fine screw (not shown). By turning an adjustment nut 141 which is screwed into this fine screw and supported by the connecting block 111 so as not to be able to move in the axial direction, the fine movement rail 48 can be moved in small amounts in the axial direction. Further, in the middle of the fine movement rail 48, there is a pair of brackets 142 erected on the upper surface of the slider 49,
The rail 48 and the slider 49 are slidably inserted into the bracket 143 and tightened with a tightening screw 144 screwed into one bracket 142.
are integrated, and by turning the adjusting nut 141 in this state, the slider 49 can be finely moved in the X-axis direction. Also, a scale 145 is fixed to the upper slider guide rail 46, and this Detector 181 provided within the scale 145 and slider 49 (see FIG. 4)
K is configured such that the amount of movement of the υ slider 49 and, in turn, the measuring stylus 53 in the X-axis direction can be detected.

A support angle fine adjustment screw 151 is rotatably but immovably supported in the axial direction between the slider 490 and the slider 142, 143. + A nut member 152 is screwed into the setting screw 151, and a fixing screw 153 is inserted into a U-shaped groove 152A (see Fig. 4) formed at the bottom of this nut member 152, and this fixing screw 153 is rotated. It is screwed into the tip of the side arm 154A of the arm 154. Therefore, when the fixing screw 153 is loosened, the nut member 152 is moved as the fine adjustment screw 151 rotates, while when it is tightened, the nut member 152 is moved by the rotation of the fine adjustment screw 151.
Zero rotation is not possible.

The lower end of the rotating arm 154 is engaged with the rotational center shaft 182 of the spindle support 51 via a sliding piece 183, and the tightening screw 1 inserted into the rotating arm 154
By screwing in 55, the sliding piece 183 is aligned with the central axis 182.
The rotating arm 154 and the rotation center shaft 182 are pressed against each other.
and are fixed together.

Therefore, when the tightening screw 155 is loosened, the spindle support 51 can be tilted freely toward the slider 49;
By tightening the tightening screw 155, the spindle support body 51 can be fixed at any angle, and further, while the tightening screw 155 is in the tightened state, loosening the fixing screw 153,
By rotating the fine adjustment screw 151, the angle of the support body 51 can be finely adjusted. Further, the inclination angle of the support body 51 at this time is determined by the main length 15 of the angle meter side means 50.
6 and a vernier scale 157 for accurate reading. At this time, the main scale 156 is placed on the slider 4-9 side, for example.
The vernier 157 is provided on the spindle support 51@, and this may be reversed.

A compression spring 184 is interposed between the sliding piece 183 and the recess in the rotating arm 154, and the biasing force of the spring 184 causes a predetermined position between the sliding piece 183 and the central shaft 182. 11% force is applied, and this frictional force causes the tightening screw 155 to tighten.
Even if the spindle support 51 is loosened, the spindle support 51 is prevented from rotating immediately.

As shown in FIG. 5, roller support frames 185 and 186 are fixed inside the slider 49, and the support frame 185 has four rollers 181,188°189.1.
90, the support frame 186 has two rollers 191,
192 are rotatably supported. Among these, the upper three rows 2187°188.189 are in contact with the circumferential surface of the upper slider guide rail 46 from 120 degrees, and the lower three rows 2190, 191.1
92 is also 1 on the lower slider guide rail 470 side.
The slider 49 is brought into contact with it from a 20 degree direction so that the slider 49 can move smoothly. At this time, the linear portion of the rail 47 above the row 91871, that is, the surface on which the scale 145 is provided, is brought into contact with the scale 145 and the detector 1.
An index scale (not shown) provided at 81 can be moved in parallel. Also, each roller 1
87 to 192 are fitted onto eccentric shafts or damaged bushings so that the contact with each rail 46 and 47 can be adjusted, and the upper three rollers 187 to 189 are mainly used for positioning with the scale 145. However, the lower three rollers 190-1
92 mainly holds the weight of the slider 490.

The spindle 52 has a scale 161 along the axial direction.
The scale 16141 is supported by upper and lower rollers 3a provided in the spindle support 51 so as to be slidable in its axial direction. Among these, the upper three rollers 201, 202, and 203 are arranged so that their normal directions make an angle of 120 degrees with each other, as shown in FIG. 1 roller 2
04 is shown, but the upper rollers 201-20
3, they are provided at 120 degrees equidistant positions. Also,
Each of these rollers 201 to 203 is also fitted into a 6Vi eccentric bushing having an eccentric shaft, so that the contact with the spindle 52 can be adjusted.

Due to the action of the scale 161 and the detector 205 provided in the spindle support 51, the amount of movement in the axial direction of the spindle 52 and thus the probe 53, that is, the amount of movement in the two axial directions when the inclination of the support 51 is zero. can be measured. In addition, the lower end of the spindle 52 and the support body 51
A constant pressure spring 162 made of a thin, wide spring material and formed by winding one end into a spiral spring shape is stretched between the constant pressure spring 162 and the system spindle 52, which is in balance with its own weight. The scale 161 is biased to rise at a slight speed, and the surface of the scale 161 can also be maintained.

At the lower end of the spindle 52, as shown in FIG.
is supported so as to be movable in the axial direction, and the adjustment nut 1 is screwed into a fine screw (not shown) provided on the fine movement shaft 163.
64 is rotatably but immovably supported at the bottom of the spindle 52, and by turning this adjustment knob 164, the spindle 52 and fine adjustment shaft 163 are moved relative to each other in the axial direction. . Further, a tightening screw 165 for fixing the fine adjustment shaft 163 to the support 51 is screwed into the side surface of the support 51. With the adjustment screw 165 fixing the fine adjustment shaft 163 to the support 51, the adjustment nut 1 is
By rotating the shaft 64, the system spindle 52 can be slightly moved in its axial direction.

Further, a gauge head mounting bush 171 is attached to the lower end of the spindle 52 so that it can be attached to the set screw 172.
73 is removably added. Further, a mounting hole 171A is also formed in the mounting bush 171 in a direction perpendicular to the axis of the spindle 52.
By inserting the K measuring stylus 53 and fixing it with a set screw 173, the tip of the measuring stylus 53 can be directed in directions that are 90 degrees apart from the axis of the spindle 52. Incidentally, by not using the mounting bush 171, it is also possible to use the measuring tip 53 having the same thickness as the mounting bush 171.

As shown in FIGS. 4 and 7, a spindle support 51 is mounted on the lower surface of the slider 49 at a predetermined angle with respect to the slider 49, for example, so that the axis of the spindle 52 is exactly vertical (two-axis direction). A positioning device 210 is provided for positioning so that This positioning device 210 has a bearing member 2 that is identified by a bolt 211 on the slider 49.
12, and is supported by the bearing member 212 so as to be slidable in the horizontal direction, and has a male screw 213A as a threaded portion at one end.
and a locking shaft 213 as a first member integrally formed coaxially with the tapered shaft 213B as the tenor 1 part, a male screw 213A of the locking shaft 213, and the tenor shaft 213.
A female thread 214A as a threaded portion and a Teeno arm hole 214B as a Teeno 4 part are integrally formed on the same axis and are screwed and engaged with the spindle support body 5, respectively.
1 through an adhesive 215 and fixed thereto.
a locking bush 214 as a locking member, a knob 216 fixed to the other end of the locking shaft 213, and a locking bush 214 interposed between the knob 216 and the bearing member 212,
a compression coil spring 217 as a release means which urges the retaining shaft 213 in a direction away from the engaging bush 214 and prevents the retaining shaft 213 from interfering with the rotation of the spindle support 51;
and a stone/4218 which is attached in the vicinity of the tenor arm shaft 213B of the front We retaining shaft 213 and prevents the engagement shaft 213 from coming off from the bearing member 212 due to the urging force to the right in the figure by the spring 21W. and the bearing member 21
2, both are engaged in the middle of the retaining shaft 213 to prevent the retaining shaft 213 from wobbling within the bearing member 212 and to regulate the engaging shaft 213 to always slide at a constant position. and a position regulating means 220.

As shown in FIG. 7, the position regulating means 220 includes an engaging member insertion hole 212B that is provided in the bearing member 212 so as to partially intersect with the shaft hole 212 through which the retaining shaft 213 is inserted. , beveled surfaces 221A, 2 which are slidably accommodated in the insertion hole 212B and are still in contact with the outer peripheral surface of the engagement shaft 213 partially exposed in the insertion hole 212B.
A pair of retaining members 221 and 2 formed with 22A, respectively.
22, and a connection that slidably passes through the first engaging member 221 of these retaining members 221, 222 and screws its tip into the other retaining member 222? bolt 223, the head 223A of this connecting bolt 223, and the one retaining member 22.
1, the engaging members 221 and 222 are biased toward each other, and the beveled surfaces 221A and 222A of the retaining members 221 and 222 are pushed toward the circumferential side of the engaging shaft 213, respectively. A compression spring 224 as a biasing means that presses the other side of the engaging shaft 213 against the wall side of the shaft hole 212 to remove looseness between the engaging shaft 213 and the shaft hole 212A. It consists of

Next, how to use this embodiment will be explained.

At the beginning of use, except for the tightening screw 155 that allows the spindle support 51 to tilt, the other tightening screws 87, 144 are removed.
and 165 to allow free movement of the support 41, slider 49 and spindle 52, and move the measuring head 53 to x, y, z.
It is made to be able to move to any position on the axis, and in this state, the probe support member 40 is moved to the base 21 as shown in FIG.
Move it to one end.

Next, the object to be measured 54 is carried onto the base 21, and the object 54 is placed on the base 21.
It is fixed to the base 21 using the appropriate screw hole 22 for mounting the object to be measured above and a mounting jig (not shown).

The dimensions, shape, etc. of each part of the object to be measured 54 fixed on the base 21 are measured in the same manner as with a conventional three-dimensional measuring machine.

That is, grasp the lower part of the spindle 52 and
The tips of the probes are brought into contact with predetermined positions of the object to be measured 54 one after another, and the amount of movement of the probe 53 in the X, Y, and two axis directions at this time is
A detector (not shown) attached to the lower part of the column 41, detectors 181 and 205 provided in the slider 49 and spindle support 51, and each scale 33°14.
5.161, the data is read out, displayed on a display device (not shown), and further processed by a commonly used data processing device and printed out.

In addition, if necessary, each tightening screw 87 loosened above,
144. and 165 may be tightened to perform fine movement of the supports 41 and 42 in the Y-axis direction, the slider 49 in the X-axis direction, and the spindle 52 in the two-axis direction.

If the measuring element supporting member 40 moves back and forth significantly during the moving operation of the measuring element supporting member 40 and hits the shock absorber 90, a compression bar (not shown) in the shock absorber 90 is bent. This reduces the impact on the probe support member 40 and effectively prevents the probe support member 40 from being deformed.

Furthermore, when measuring a location having a predetermined angle with respect to the two axes, the spindle support 51 is tilted to match the angle. This inclination of the support body 51 is caused by the positioning device 2
The engagement shaft 213 of No. 10 and the engagement bush 214 are disengaged, and the tightening screw 155 is loosened to allow the support body 51 to freely tilt. In this state, the angle measuring means 50 is adjusted to approximately the desired angle. While watching, set the support body 51 at an inclination and tighten the tightening screw 155 to fix it in that position. Then,
With the fixing screw 153 loosened, adjust the angle vM adjustment screw 151.
Turn to make fine adjustments to the angle.

Next, a method for installing the positioning device 210 according to the present invention will be explained.

The engagement shaft 213 to which the stone 218 is attached is inserted into the bearing member 212 from the opposite side of the stone 1218. Next, the engagement members 221 and 222 are inserted from both sides of the insertion hole 212B of the bearing member 212, respectively. the beveled surfaces 221A, 222A of each retaining member 221, 222 are brought into contact with the engagement shaft 213, and these retaining members 221, 22
Connecting bolt 223 with compression inlet 224 interposed in 2
Screw in the engaging shaft 213 with both engaging members 221 and 222.
is pressed against the side wall of the shaft hole 212A to form a subassembly of the bearing member 212, and this subassembly is inserted into the shaft hole 211.
It is fixed to the lower surface of the slider 49, which is one of the structures.

On the other hand, the other structure, the spindle support 51',
Precisely position and fix the slider 49 using the angle measuring means 50, the angle fine adjustment screw 151, etc.,
In addition, a retaining bushing 214 is attached through an adhesive 215 into a large hole provided in the frame of the spindle support 51, ie, a so-called dumb hole. The engagement shaft 213 is coupled to the engagement bush 214 before the adhesive 215 hardens. The engagement shaft 213 and the engagement bush 214 are connected to each other using the male and female threads 213A and 214A, the tenor arm shaft 213B, and the cheek hole 214B, and are accurately positioned. At this time, the order of insertion of the locking bush 214 into the hole and coupling with the locking shaft 213 may be reversed, and it does not matter whether they are inserted before or after.

In this manner, the first member, the retaining shaft 213, and the second member, the retaining bush 214, are joined together, and wait for the adhesive 215 to harden. When the hardening is completed, the retaining shaft 213
13 and the locking bush 214, and then the knob 216 is attached to the right end of the locking shaft 213 with the compression coil spring 217 interposed therebetween, thereby completing the manufacturing and assembly of the positioning device 210. After this, the slider 49 and the spindle support 51 are left in a free state, and the retaining shaft 213 and the bushing 214 are connected using the screw 213A.

214A and the tapered shaft 213B and the tapered hole 214B, the slider 49 and the spindle support 51 are always accurately positioned at predetermined positions.

According to this embodiment as described above, there are the following effects.

That is, since the locking shaft 213 as the first member and the locking bush 214 as the second member are positioned in a coupled state, the origin of the slider 49 and the spindle support 51, the (8 points) return point is determined. Accuracy is within 1μm,
Considering that the conventional method has a diameter of about 30 μm, it is possible to achieve extremely high precision and to operate quickly. Also,
The locking shaft 213 and the locking bush 214 are the Q/4 shaft 21.
3B and the cheek hole 214B, but also the male thread 213A and the female thread 214A, the force in the axial direction of the retaining shaft 213 becomes excessive, causing the first. There is no bending of the slider 49 and spindle support 51, which are the second structures, and good accuracy is maintained.

Further, since only the restoring force of the compression coil spring 217 serving as a releasing means is applied to the retaining shaft 213, no tensile force that would cause the slider 49 etc. to deform is generated.

In addition, the tapered hole 214B has the male screw 2 during the locking operation.
Since it also serves as a guide for 13 people, it is extremely easy to perform bonding operations. Further, since the engaging shaft 213 and the retaining bush 214 are screwed together, even if force is applied to the fixed side of the bush 214, the teno mother joint will not loosen. Further, since the locking shaft 213 is provided with a position regulating means 220, accuracy can be maintained, and the locking shaft 213
There is no play in the engagement shaft 213 due to this play.
No loosening or the like will occur.

Furthermore, since the retaining bushing 214 of the positioning device 210 is fixed by adhesive, the positioning device 210 and each structure, i.e., the slider 49 or the spindle support 51,
There is no need for centering, etc., making production easier. Further, there is no need for processing precision of the mounting portion of the positioning device 210 on the structure side, and from this point of view as well, manufacturing can be facilitated.

Further, since the locking shaft 213 is provided with a compression coil spring 217 as a releasing means, when the locking shaft 213 is released, the locking shaft 213 interferes with the spindle support 51 side and obstructs the operation. There is no such thing.

FIGS. 8 and 9 show other different embodiments of the present invention, and these are examples in which the male and female relationships between the threaded portion and the cheek portion are different. Here, the same or equivalent components between these embodiments and the previous embodiment are designated by the same or equivalent symbols to simplify the explanation.

That is, in the embodiment shown in FIG. 8, a female screw 813 and a cheek hole 813B are provided on the locking shaft 813 side, and a male screw 814A is provided on the protruding shaft 814 side corresponding to the locking bush.
and Q/4 shaft 814B are provided, and the holding shaft 81
A stone 9818 is formed at the large diameter portion of No.3.

Also in this embodiment configured in this way, the protruding shaft 814
As long as it is fixed in position by the adhesive 215,
Effects similar to those of the embodiment described above can be achieved.

In the embodiment shown in FIG. 9, there is a female thread 913A on the engagement shaft 913 side.
and a tapered shaft 913B are provided, and a retaining bush 914
A male screw 914A and a tapered hole 914B are provided on the side.

Also in this embodiment configured in this way, as long as the locking bushing 914 is positioned using the adhesive 215, the same effects as in each of the embodiments described above can be achieved.

In addition, in each of the above embodiments, the locking shafts 213 and 813.

913 is the first member, the locking bush (protruding shaft) 214° 814.914 is the second member, and the slider 49 is the first member.
Although the structure shown in FIG. 1 and the spindle support 51 are used as the second structure, these structures are used for convenience and are not intended to be substantially limiting. Further, the direction of relative movement between the two structures is not limited to rotation, and may be reciprocating movement, and the direction is not limited.

Further, one of the first and second members, for example, the second member, the locking bush 214, 814, 9
14 is positioned on the second structure, for example, the spindle support material 51, and provided in multiple stages, the angle can be set at multiple desired locations.

Furthermore, in each of the above embodiments, the bushing side was identified and the shaft side was movable, but this may be reversed; in short, one of the sides is movable and the other is fixed, and this fixed side is combined with the movable side. Any device that can be positioned and fixed in a fixed state may be used. At this time, the fixing means is not limited to adhesive, and may be bolted or the like, but adhesive fixing makes the work easier and more reliable, and there is little change over time.

Furthermore, the release means is not limited to the compression coil spring 217, but may be any other mechanism, for example, the engagement shaft 213 and the bearing member 2.
12 may be provided with a so-called piellonet type retaining mechanism.

Furthermore, the present invention can be applied not only to measuring machines such as coordinate measuring machines, but also to positioning of relatively moving parts of other general equipment, but it is extremely useful to apply to measuring machines because of its high accuracy. It is.

As described above, according to the present invention, it is possible to provide a positioning device that has a simple structure, can perform positioning with high accuracy, and does not interfere with the movement of a structure that moves relatively when releasing the positioning, and a method for manufacturing the same. There is an effect.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment in which the present invention is applied to a coordinate measuring machine, Fig. 2 is an enlarged perspective view with a part cut away showing the slider portion, Fig. 3 is a front view of the same, and Fig. 4 5 is an enlarged side view showing a part of the internal structure of the slider, FIG. 6 is a sectional view taken along the line Vl-Vl of FIG. 4, and FIG.
The cross-sectional view taken along the line ■--■ in the figure, and FIGS. 8 and 9 are cross-sectional views showing other different embodiments of the present invention. 21... Base, 40... Gauge head support member, 49.5
1... 1st. Slider and spindle support as second structure, 210... positioning device, 211...
・Gel), 212...Bearing member, 212A...Shaft hole, 212B...Through hole, 213,813,913,2
14°814.914...1st. A locking shaft, a locking bush and a protruding shaft as a second locking member, 213A, 814
A. 914A, 214A, 813A, 913A... Male thread and female thread as threaded portion, 213B, 814B, 91
3B. 214B, 813B, 914B... Theno 9 axis and Theno mother hole as a taper part, 215... Adhesive, 21
7... Compression coil spring as release means, 220...
- Position regulating means, 221, 222... retaining member, 22
3... connection gel), 224... compression spring as biasing means. Agent Patent Attorney Minoru Kinoshita Figure 3 Figure 4 (Figure 3 Figure 1 22A Figure 8 10 Figure 9 10

Claims (1)

[Scope of Claims] (1) In a positioning device that holds a relatively movable first structure and a second structure in a predetermined positional relationship, a threaded portion and a tapered portion provided on the same axis and a second member having a threaded portion and a cheek/nine portion corresponding to the threaded portion and a cheek/fourth portion of the first member, respectively. Any one of the second members is provided movably in the axial direction where they are engaged with each other, and one of these members is attached to the first structure,
Either one of them is attached to the second structure, and the first one is attached to the second structure. A positioning device comprising a release means for maintaining a separated state of the second member. (2. In claim 1, the first member is constituted by a locking shaft having a male thread at its tip and a Teno J-shaft, and the second member is a female thread that can be screwed into the male thread. The positioning device is characterized in that it is constituted by a bushing having a hole T4 which can be secured to the tenor shaft. (3) In claim 2, the locking shaft is , a positioning device characterized in that it is slidably fitted into a bearing member via a position regulating means and is attached to the first or second structure via the bearing member. (4) Patent According to claim 2 or 3, the positioning device is characterized in that the bush is fixed to the first or second structure via an adhesive. (5) The first relatively movable bush. A manufacturing method for manufacturing a positioning device that holds a structure and a second structure in a predetermined positional relationship, the method comprising:
9 parts, and a second member having a threaded part and a chip-receiving part corresponding to the threaded part and the chip/1 part of the first member. After screwing them together and engaging the two parts of the teeth 71 and assembling them integrally, either the first member or the second member can be moved in the axial direction of the first structure or the second member. Manufacturing by attaching to either one of the second structures and fixing the other of the first member or the second member to the other of the first structure or the second structure. A method for manufacturing a positioning device characterized by: (6) Permissible scope In claim 5, a first member or a second member that is not moved in the axial direction is attached to the first structure or the second structure to which the member is fixed by an adhesive. A method for manufacturing a positioning device, characterized in that it is fixed horizontally.