JP2002283167A - Centering and positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable accurate positioning by a simple operation without preparing a special component. SOLUTION: This centering and positioning device 10 positioning and fixing a second member 3 to a first member 1 comprises a positioning body 11 capable of penetrating holes respectively provided on the first member 1 and a second member 3, a plurality of expansion pieces 18 radially disposed in relation to the positioning holes, 2, 4 inner surfaces of the first and second members 1, 3 radially expandable and contactable and a pair of two operating shafts 20, 30 applying thrust to press tapered surfaces 21, 31 on the expansion pieces 18 to be pushed out of the outer periphery to abut on and to be held by the members 1, 3, and centering them. When the operating shafts 20, 30 are advanced in the axial direction, the expansion pieces 18 are pushed out, and when the operating shafts 20, 30 are retreated, the expansion pieces 18 are stored in the positioning body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of moving a member in an axial direction by inserting the member into holes formed in two parts.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centering / positioning device that enables a hole core to be aligned with the same center with high accuracy.

[0002]

2. Description of the Related Art Conventionally, when two parts are combined with various devices and apparatuses, a shaft or a pin is inserted into one of the holes to align a mounting hole or a shaft hole for assembly. In addition, a measure is taken such that the hole of the other part is fitted to a shaft inserted into the one part and aligned. Also, in the alignment of the two parts, for example, in the middle of the work or when preliminarily assembled, a tapered hole penetrating both is provided so that both positions can be determined, and the tapered hole matches the tapered hole. Measures are taken such as fitting the taper pin later to position it.

[0003] Japanese Patent Application Laid-Open No. 10-175133 discloses a positioning and fixing device for accurately positioning and fixing a jig plate or the like to a processing base. In the technique disclosed in this publication, a bush provided with a hole through which the knock pin can be inserted is fixed to each of a first member and a second member to be aligned using a taper knock pin having a partially tapered portion. In addition, after the first member and the second member are overlapped, the knock pin is inserted into the insertion hole from the taper forming side of the knock pin, and the knock pin is pulled in the axial direction by the biasing means and rotated. An arrangement for increasing the engagement force and positioning is described.

[0004]

In the positioning device described in the above publication, a bush having a hole through which a taper pin can be inserted is attached in advance, so that the positioning of the specified members is performed. However, there is a problem that the bushing is limited in that it requires only a bush having a tapered hole, and is provided with a biasing means, so that it cannot be generally used.

In addition, as described above, in general alignment, the work always depends on prior preparations and empirical rules, and there is a problem that efficiency is inevitably low. In particular, in the operation of aligning two holes having a dimensional difference, it is sufficient if there is a part that fits in the hole. Otherwise, a mounting hole for centering is provided at a separate position, and this mounting is performed. Requires extra work, such as aligning in holes. In addition, they are forced to perform scoring and align with the markings. Such an operation is inevitably low in accuracy and requires a lot of trouble. In any case, the conventional method has a problem that the working efficiency and the dimensional accuracy are low and the working cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and there is no need to prepare separate parts, and a centering / positioning apparatus having a function of performing high-precision positioning by a simple operation is provided. It is intended to provide.

[0007]

Means for Solving the Problems and Action / Effect In order to achieve the above-mentioned object, a centering positioning device according to the present invention provides a centering positioning for positioning and fixing a second member to a first member. In the device, a positioning main body that can be inserted into the hole provided in the first member and the hole provided in the second member, and inside the main body, the inner peripheral surface of the hole of each of the first and second members. A plurality of extensions that are radially arranged so as to be freely expandable and contractable, and when a thrust is applied to press the tapered portion at the tip against the extensions, each extension is pushed out from the outer periphery and held in contact with the member, and An operating shaft that allows the fitting to be performed, and when the operating shaft is advanced in the axial direction, the extension is pushed out to the outer periphery, and when the operating shaft is retracted, the extension can be housed inside the main body. Characterized by It is intended.

In the present invention, the two holes provided in the first member and the second member to be aligned are aligned with each other, and the hole of one member is replaced with the hole of the other member. When the insertion part of the positioning main body of the centering positioning device is fitted into the main body, and then a propulsive force is applied to the retreating operation shaft body, the tapered end of the operation shaft body radially fits inside the main body. And the extensions are simultaneously pushed outward by the forward displacement of the tapered end portion. Then, each extension is extruded from the outer periphery of the main body in the radial direction under the same conditions, and the extensions abut on the inner peripheral surface of the hole of the member and automatically move the axis of the positioning main body through the operating shaft to the center of the hole. Position. In other words, the center of the hole of the two members is matched by the positioning device.

According to the present invention, the positioning body is inserted into the positioning holes of the two superimposed members so that the extension can face the inner circumference of the positioning holes provided in the two members. When the operating shaft is propelled, each extension is extruded radially and can be automatically aligned without eccentricity. If it becomes unnecessary, it can be easily removed from the positioning hole only by retracting the operation shaft. Therefore, if the operation is easy and a positioning device corresponding to the hole diameter to be mounted in advance is prepared,
There is an effect that the centering and positioning operation can be performed extremely easily. Naturally, the workability is significantly improved, and the work cost can be reduced.

In the present invention, the extension provided in the positioning main body is disposed at a first stage at a position where it contacts the first member and at a second stage at a position where it contacts the second member. Is preferably of a double structure in which the first-stage extension and the second-stage extension can be individually operated. By doing so, the first-stage extension is extruded to first hold the centering positioning device in the hole of the first member, and then the second-stage extension is extruded. By aligning the above members, the effect of reliably and easily performing the alignment work can be obtained.

[0011] The operating shaft body may include a first operating shaft for operating a first-stage extension and a second operating shaft for operating a second-stage extension coaxially. Preferably, the shafts are individually operable through the first operating shaft, and the distal ends of both operating shafts are preferably provided with tapered portions for operating the extensions. According to the operating shaft body configured as described above, by advancing the first operating shaft, the extensions that come into contact with the tapered portion of the shaft tip are simultaneously extruded in the radial direction and pressed against the inner peripheral surface of the positioning hole of the work. The axis of the centering and positioning device is aligned with the hole axis, and then the second operating shaft is advanced, so that the second stage extension is radially extended by the tapered portion of the shaft tip. The positioning hole of the second work that is pushed out and abuts can be aligned with the axis, and the positioning function can be performed simply and reliably.

Further, the positioning main body includes an insertion portion having a diameter smaller than the inner diameter of a positioning hole provided in the member to be positioned, and a mounting and holding portion having a reference surface abutting on the back surface of the first member. The insertion portion is orthogonally divided into at least three equal parts on a cross section orthogonal to the axis, and an extension insertion hole portion is provided in two stages through the shaft core, and the shaft core is provided from the end of the mounting holding portion. Preferably, a hole into which the first operation shaft and the second operation shaft are inserted is formed. With this configuration, when the insertion portion of the positioning body is inserted into the hole formed in the member to be positioned and the reference surface of the mounting and holding portion is brought into contact with the back surface of the first member, the alignment device becomes Is maintained, and the next centering operation is facilitated.

It is preferable that the outer end of the extension insertion hole provided in the positioning body is slightly smaller than the maximum diameter of the extension to be inserted. In this case, the extension can be handled safely without dropping out to the outside during normal times. Further, the extension is preferably a steel ball. Alternatively, a pin structure is preferable. In the case where the extension is a steel ball, the structure of the extension insertion hole is simplified, and furthermore, the effect of being able to quickly push out and retreat by the tapered portion of the operation shaft is obtained. Further, when the extension has a pin structure, a contact surface of the extension with respect to the inner peripheral surface of the positioning hole can be widened, so that there is an effect that positioning can be performed without applying an excessive pressing force.

In the present invention, the operating means of the operating shaft for moving the operating shaft body forward and backward includes a screwing structure between the first operating shaft and the inner periphery of the mounting and holding portion of the positioning body, and a second operating shaft and a second operating shaft in the first operating shaft. It is preferable that the operation shaft can be advanced and retracted by rotating each of the operation shafts by a knob provided at an end of the operation shaft by a screwing structure at a screw forming portion in the operation shaft insertion hole. In this case, both the first operation shaft and the second operation shaft can be surely moved in the radial direction by the tapered end portion by the axial movement by the lead of the screw. In addition, there is an advantage that the movement amount can be finely adjusted, and the fixing at the movement position can be easily performed.

The operating means of the operating shaft for moving the operating shaft body forwards and backwards includes a fluid cylinder provided inside the mounting and holding portion of the positioning main body for moving the first operating shaft forward and backward, and a fluid provided outside the second operating shaft. It may be configured to be advanced and retracted by a pressure cylinder. In this case,
Since the centering positioning can be performed by moving the operation shaft back and forth using the fluid pressure as a medium, there is an effect that the centering positioning operation can be performed by remote control. In addition, since the operator can directly align the center without performing manual operation, if the operation of superimposing the second member on the first member is performed manually (mechanical operation), the centering can be performed by, for example, operating a foot pedal. This makes it possible to perform such work, which is very effective for centering and positioning in a flow operation and the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a centering and positioning apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a partial longitudinal side view of a first embodiment of a centering and positioning apparatus according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. And Figure 1
2 (b) and an enlarged cross-sectional view (c) showing a main part of the extension insertion hole, respectively.

The centering and positioning device 10 of the first embodiment includes a positioning body 11 inserted into and held by positioning holes 2 and 4 provided in two members 1 and 3 for centering and positioning, and a positioning body 11 inside the body 11. A plurality of extensions 18 which are incorporated in the first member 1 and the second member 3 and are radially expandable and contractible with respect to the inner peripheral surfaces of the positioning holes 2 and 4 of the second member 3;
The first operating shaft 20 and the second operating shaft 30 for moving the extension 18 forward and backward to directly move the extension 18 are configured.

The positioning main body 11 includes an insertion portion 12 having a diameter which can be easily inserted into the positioning hole 2 provided in the first member 1 for centering and positioning and the positioning hole 4 provided in the second member 3. Inserting part 12 into positioning hole 2 of one member
Is formed integrally with a mounting and holding portion 13 having a diameter larger than that of the insertion portion 12 and forming a reference surface 14 which abuts on the back side of the member.

Insertion section 12 of positioning body 11
In the first member 1, the position corresponding to the inner peripheral surface of the positioning hole 2 in the first member 1 and the position corresponding to the inner peripheral surface of the positioning hole 4 by overlapping the second member 3 are respectively orthogonal to the axis. A first-stage extension insertion hole 15 and a second-stage extension insertion hole 15 ′ are radially divided into three parts from the axis in the cross section, and the outer end of the mounting holding portion 13 is provided in the axis. A stepped operation shaft insertion hole 16 is provided. Each of the extension insertion holes 15 and the extension insertion holes 15 ′ is formed as a through hole passing through the axis, and the tip end 15 a of the extension insertion hole 15, as shown in FIG. The plug 17 is fitted into the rear end portion so that the extension 18 does not fall off.

Each of the extensions 18 inserted into each of the extension insertion holes 15 and 15 'is a steel ball. Two extensions are inserted into the extension insertion holes 15 '. In a normal state, the positioning body 11 fits within the outer peripheral surface of the insertion portion 12.

The first operation shaft 20 and the second operation shaft are formed in a double structure having the same axis. The first operation axis 20
Is a hollow shaft, a tapered surface 21 is formed at the front end, and a knob 22 for rotating operation is integrally provided at the rear end. A screw portion 23 is formed on the outer periphery of the intermediate portion, and the positioning main body 1 is formed.
The female screw part 16a for propulsion provided on the inner circumference of the mounting holding part 13 and the screw part 23 of the intermediate part are screwed into each other, and the extension 18 of the first stage, which is built in by the tapered surface 21 at the tip end, is radiused. It is made to move in the direction. The hollow hole of the first operation shaft 20 is formed in a stepped hole 24, a female screw 25 is formed in an intermediate step hole, and the base of the second operation shaft 30 is loosely inserted into the inner periphery of the knob 22. Like that knob 2
2 A well-known plunger 26 is attached to the tip of the ball 26 from the outer periphery toward the shaft center by the thrust of the built-in spring.

The second operation shaft 30 is assembled so as to penetrate the hollow hole of the first operation shaft 20, and has a tapered end 31, and a screw portion 3 provided at an intermediate portion.
2 is screwed into a female screw 25 provided in an intermediate step hole of the first operation shaft 20 so as to be able to advance and retreat, and a knob 33 for rotational operation is integrally formed at the rear end. Also,
A notch 3 is formed on the peripheral surface of the main portion 34 of the second operation shaft 30.
5 is provided in at least one place, and the notch 35 is engaged with the ball 26 a of the plunger 26 attached to the knob 22 of the first operation shaft 20 so that the ball 26 a can move forward and backward integrally with the first operation shaft 20. Has been made.

Next, the operation of the centering / positioning device 10 having such a configuration will be described with reference to FIGS.

First, as shown in FIG. 3A, the first operation shaft 20 and the second operation shaft 30 in the centering positioning device 10 are retracted, and all the extensions 18 are retracted into the positioning main body 11. To fit
The insertion portion 12 is inserted into the positioning hole 2 of the first member 1 to be aligned, and the reference surface 14 is brought into contact with the back side edge of the first member 1. In this state, the positioning main body 11 of the centering positioning device 10 is loaded into the positioning hole 2 at a fixed position.

Next, the user turns the knob 22 to rotate the screw portion 16.
The first operation shaft 20 is advanced by screwing a and 23. At this time, the ball 26a at the tip of the plunger 26 and the cut 3
By the engagement with 5, the first operation shaft 20 and the second operation shaft 30 are also advanced. Then, the distal end tapered portion 21 of the first operation shaft 20 simultaneously contacts the three extensions 18 in the first-stage extension insertion hole 15, and the extension 18 is acted on by the tapered surface 21. It is pushed outward in the radial direction by force (see FIG. 3B).

The first operation shaft 20 causes the three extensions 18 of the first stage to expand outward, so that the extensions 18 abut against the inner peripheral surface of the positioning hole 2 to stop the movement. When the first operation shaft 20 is rotated and advanced to the state shown in FIG. 3, the positioning main body 11 is held with respect to the first member 1 in a state where the axis of the positioning hole 2 and the axis of the positioning main body 11 match. You. In this state, the extension 1
Reference numeral 8 denotes a free state, which is located so as to protrude from the first member 1.

Next, the second member 3 for centering is inserted into the insertion portion 12 of the centering positioning device 10 whose positioning hole 4 is mounted and held on the first member 1 in the above-described manner.
And overlaid on the surface of the first member (FIG. 3).
(C)). At this time, since the second-stage extension 18 is in a free state, there is no problem in fitting the positioning hole 4 outside. In this case, the positioning hole 2 of the first member 1 is used.
And the positioning hole 4 of the second member 3 have the same diameter.

In this state, when the knob 33 is rotated while being held by holding means (not shown) so that the second member 3 does not separate from the overlapping surface of the first member 1,
The second operation shaft 30 is advanced by screwing an intermediate screw portion 32 and a female screw 25 provided on the first operation shaft 20, and the second stage extension is inserted by the forward movement of the tapered surface portion 31 at the distal end. The extension 18 inserted into the hole 15 ′ is simultaneously moved radially outward and protrudes from the outer periphery of the insertion portion 12. At this time, the first operation shaft 20 is provided
Since 1 is in contact with the extension 18 and is locked in the expanded state with respect to the positioning hole 2, the fixed state is maintained, and only the second operation shaft 30 rotates.

When the extension contacts the inner peripheral surface of the positioning hole 4 of the second member 3, even if the positioning hole 4 is eccentric, the degree of contact with the extension 18 pushed out in three directions is reduced. The center is automatically aligned by making uniform contact as the height increases, and the axis is aligned with the positioning hole 2 of the first member 1 (see FIG. 3D). Therefore, when the positioning operation is completed, the first and second members 1 and 3 are fastened by bolts or the like at other portions, or other parts are attached and fixed, so that the intended purpose work is completed. finish.

When the operation is completed, the centering positioning device 10
When the knob 22 of the first operation shaft 20 is rotated in the opposite direction as shown in FIG. 3 (e), the second operation shaft 30 is retracted together with the first operation shaft 20, and Each extension 18, which has been pressed outward by the tapered surface portions 21, 31 at the tip of each operation shaft, is freed by removing the pressing force, and is released from the state of contact with the positioning holes 2, 4. Therefore, easily aligning and positioning device 1
0 can be removed.

As described above, according to the centering positioning device 10 of the present embodiment, in order to perform centering positioning of the positioning holes provided in the two members, after mounting the positioning holes of one of the members, By overlapping the positioning holes of the other member and then turning the operation shaft,
By extruding the extensions all at once, the positioning can be performed easily and accurately, the workability is good, and the work efficiency can be improved.

Next, a second embodiment of the alignment apparatus will be described with reference to FIGS. 4 and 5. FIG.

The centering and positioning apparatus 10A of the second embodiment is of a fluid pressure type, and is basically the same as that of the first embodiment. The same or similar parts in the configuration are denoted by the same reference numerals as those in the above-described embodiment, and the detailed description thereof is omitted. Further, in this embodiment, the positioning hole 4A of the second member 3A is smaller in diameter than the positioning hole 2A of the first member 1A.

The positioning body 11A has positioning holes 2A,
4A is provided with an insertion portion 12A and an attachment holding portion 13A whose outer diameter at the distal end portion is smaller than the outer diameter at the base side so as to correspond to 4A.
5a is provided at a position corresponding to the side of the first member 1A on a cross section orthogonal to the axis and divided radially from the axis,
A second-stage extension insertion hole 15b is provided radially at a position corresponding to the second member 3A side in the same manner as in the first-stage. A stepped operation shaft insertion hole 16A is provided on the axis from the end face of the mounting and holding portion 13A, and the operation shaft insertion hole 16A is a first operation shaft into which the intermediate step hole 16b and the end step hole 16c are inserted. 20A is precisely finished to form a cylinder.

Each of the extension insertion holes 15a and 15b is
(A) As shown in (b), a step hole is formed on the outer peripheral side, so that an annular holding piece 19 for preventing the inserted extension 18A from falling off can be mounted. Extension 1 inserted into these extension insertion holes 15a, 15b
8A is a stepped pin structure in which the front half 18a has a smaller diameter than the rear half 18b.
A coil spring 19a is fitted on a stepped portion between the boundary and the holding piece 19, and the pin is constantly urged by the back surface of the holding piece 19 so as to retreat, so that the front end faces outward from the holding piece 19. The extension 18A has a rear end formed in a flat conical shape (or a curved surface), and has an operation shaft 20A.
A is advanced and retracted in contact with the tapered surfaces 21a and 31a of the tip A. The holding piece 19 is attached to the insertion portion 12A by a small screw.

The first operating shaft 20A and the second operating shaft 30A have a double structure, and a tapered surface 21a for operating the first-stage extension 18A is formed at the tip of the first operating shaft 20A. The fluid pressure cylinder 28 is precisely finished so as to hermetically slide with the inner periphery of the operation shaft insertion hole 16A formed in the positioning body 11A, and the stepped hole 16c at the rear end of the operation shaft insertion hole 16A. A constituent flange 28a (piston) is formed. The fluid pressure cylinder 28
The pressure fluid is supplied from a pressure source (not shown) provided in the positioning main body 11 to the connection ports 28b and 28c through pipes supplied by well-known control means.

The second operating shaft 30A is connected to the first operating shaft 20.
A is inserted through a hole provided through the shaft core of A, and a tapered surface 31a is formed at the tip.
The rear end is connected to the piston rod 35a of the fluid pressure cylinder 36 attached to the open end of the mounting and holding portion 13A of the positioning main body 11A. The pressure fluid for the fluid pressure cylinder 36 can also be operated by connecting to a separately installed pressure source, similarly to the manipulation fluid pressure cylinder 28 of the first manipulation shaft 20A. As these pressure fluids, compressed air and hydraulic pressure can be used depending on the application.

The operation of the centering / positioning apparatus 10A of the second embodiment is not limited to this, but, for example, the positioning body 11A is placed at a fixed position on a worktable (not shown) with the positioning body 11A facing upward, and the insertion section 12A is Fit the positioning hole 2A of the first work (member) 1A to be positioned,
When the pressurized fluid is supplied to the piston side of the fluid pressure cylinder 28, the first operating shaft 20A integrated with the piston (flange) moves forward, and the extension 18A arranged in three directions by the tapered surface 21a at the tip is simultaneously formed. 2A
Is pressed against the inner peripheral surface of the first operation shaft 20A and is held in alignment with the axis of the first operation shaft 20A.

Next, the second member 3A is placed on the first member 1A.
And the positioning hole 4A is fitted into the protruding insertion portion 12A of the positioning main body 11A so as to supply the pressurized fluid to the fluid pressure cylinder 36 even in the eccentric state at this time. When the operating shaft 30A is moved forward, the extension 18A of the second stage is operated by the tapered surface 31a at the tip thereof, and is simultaneously pushed outward in a radial direction so that the tips of the extensions 18A are positioned at the positioning holes 4A. When the abutment comes in contact with the inner peripheral surface, the core is automatically aligned and aligned on the same axis, and the alignment is completed. Therefore,
If the first member 1A and the second member 3A are fixed at required positions with required parts or fasteners, the axes can be aligned even if the holes have different diameters as illustrated. . In order to remove the product after the centering and positioning operation is completed, both the hydraulic cylinders 28 and 35 are operated in reverse to operate the first operating shaft 20A and the second operating shaft 3A.
If 0A is retracted, the tapered surface 21
The extension 18A, which has been operated by the a and 31a, is released and the extension 18A retreats at once by the restoring force of the attached coil spring 19a to be in the released state, so that the extension 18A can be easily removed.

When such a system is adopted, if the operation of the fluid pressure cylinder is operated, stopped, and retracted by using, for example, a pedal, the centering operation can be performed one after another on the work table, and the size can be reduced. The work of centering the parts can be efficiently performed. Further, the centering / positioning device can be arbitrarily utilized as a hand-held tool without being fixed. In addition, by using the extension of the pin structure, the contact surface with the workpiece during the centering operation is not cut by an excessive pressing force, and therefore, is not damaged.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view of a first embodiment of a centering and positioning device according to the present invention.

FIG. 2 is an AA diagram of FIG. 1 showing an extension incorporation unit;
FIG. 2A is a cross-sectional view as viewed from the front, FIG. 1B is a cross-sectional view as viewed along the line BB in FIG.

FIGS. 3 (a) to 3 (e) are explanatory views of operation modes of a centering / positioning device.

FIG. 4 is a cross-sectional view illustrating a second embodiment of the centering / positioning device.

FIG. 5 is a plan cross-sectional view showing a first-stage extension arrangement state (a) and a second-stage extension arrangement state (b), respectively.

[Explanation of symbols]

1, 1A First member 2, 2A, 4, 4A Positioning hole 3, 3A Second member 10, 10A Alignment positioning device 11, 11A Positioning main body 12, 12A Insertion section 13, 13A Mounting holding section 14 Reference plane 15 , 15 ', 15a, 15b Extension insertion hole 16, 16A Operation shaft insertion hole 16a, 25 Female screw 18, 18A Extension 19 Holding piece 20, 20A First operation shaft 21, 21a Tapered surface 22, 33 Knob 23, 32 Screw part 26 Plunger 28 Fluid pressure cylinder for operating the first operation shaft 28a Piston 30, 30A Second operation shaft 35 Cut 36 Fluid pressure cylinder for operating the second operation shaft

Claims (9)

[Claims] 1. A centering / positioning device for positioning and fixing a second member to a first member, wherein the positioning member can be inserted through a hole provided in the first member and a hole provided in the second member. The main body, a plurality of extensions arranged inside the main body so as to be radially expandable and contractible with respect to the inner peripheral surfaces of the holes of the first and second members, and a tapered portion at the tip is pressed against these extensions. When a thrust is given, each extension is pushed out from the outer periphery and held in contact with the member,
And an operating shaft that enables alignment, and when the operating shaft is advanced in the axial direction, the extension is pushed out to the outer periphery, and when the operating shaft is retracted, the extension can be housed inside the main body. A centering alignment device. 2. An extension provided in the positioning main body is disposed at a first stage at a position where it contacts the first member and a second stage at a position where it contacts the second member, and the operation shaft body is 2. The centering / positioning device according to claim 1, wherein the alignment device has a double structure in which the first-stage extension and the second-stage extension can be individually operated. 3. The operation shaft according to claim 1, wherein the first operation axis for operating the first-stage extension and the second operation axis for operating the second-stage extension are coaxially arranged in a second operation axis. The shafts are individually operable through the first operating shaft, and a taper portion for operating an extension is provided at a distal end of each of the operating shafts.
5. The alignment device according to claim 1. 4. The positioning body includes an insertion portion having a diameter smaller than an inner diameter of a positioning hole provided in a member to be positioned, and a mounting and holding portion having a reference surface abutting on a superimposed back surface of the first member. The insertion portion is orthogonally divided into at least three equal parts on a cross section orthogonal to the axis, and an extension insertion hole portion is provided in two stages through the shaft core, and the shaft core is provided from the end of the mounting holding portion. The centering positioning device according to claim 1, wherein a hole into which the first operation shaft and the second operation shaft are inserted is formed. 5. The centering and positioning device according to claim 1, wherein the outer end of the extension insertion hole provided in the positioning body is slightly smaller than the maximum diameter of the extension to be inserted. 6. The centering and positioning device according to claim 1, wherein the extension is a steel ball. 7. The extension according to claim 1, wherein the extension is a pin structure.
6. The centering positioning device according to any one of 5. 8. The operating means of the operating shaft for moving the operating shaft body back and forth includes a screwing structure between the first operating shaft and an inner periphery of the mounting holding portion of the positioning body, and a second operating shaft and a second operating shaft in the first operating shaft. The centering positioning device according to claim 1, wherein a screwing structure at a screw forming portion of the operation shaft insertion hole is configured to be able to advance and retreat by rotating each knob by a knob provided at an end of each operation shaft. 9. The operating means of the operating shaft for moving the operating shaft body back and forth moves the first operating shaft back and forth by a fluid pressure cylinder incorporated inside the mounting and holding part of the positioning body.
The centering positioning device according to claim 1, wherein the second operation shaft is configured to be advanced and retracted by a hydraulic cylinder provided outside.