JPH0539451Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wide range measurement and sizing device, and in particular, it measures the diameter of a workpiece over a wide range (from small to large) by moving a detector with a contact in the vertical direction. This invention relates to a wide range measurement and sizing device that measures over a wide range of diameters.

[Conventional technology]

Conventionally, there is a sizing device shown in FIG. 5 for measuring the dimensions of a workpiece having a discontinuous surface such as a cylindrical surface with a spline, a keyway, or an oil hole. This device has a contactor 1 that contacts the workpiece W.
Lever 1, 1 having A, 1A is rotatably provided in case 2, and furthermore, springs 3, 3, damper mechanisms 4, 4 are installed between these levers 1, 1 and case 2.
and detecting sections 5, 5 are provided.

The energy caused by the levers 1, 1 vibrating on the discontinuous surface of the workpiece W is absorbed by the damper mechanisms 4, 4 and the lever system support mechanism. Further, the diameter of the workpiece W is measured by detection units 5, 5 that output electric signals according to the distance between the contacts 1A, 1A, that is, the inclination of the levers 1, 1.

[Problem that the invention attempts to solve]

However, in the conventional sizing device described above, since the upper and lower lever systems are integrally held by the case 2, there is a limit to the size of the workpiece that can be measured.

Therefore, the upper and lower detectors (lever system) are not integrated, but are made separate and movable in the vertical direction.The upper and lower detectors are spaced according to the diameter of the workpiece, and the distance is measured. If you do this,
A wide range of measurements becomes possible.

However, in this case, if the upper and lower detectors are not securely fixed, errors will occur in the distance measurement between the upper and lower detectors due to vibrations that occur when measuring discontinuous surfaces.
Precise measurements will no longer be possible.

The present invention was developed in view of these circumstances, and it allows the detector to be easily and reliably fixed at a desired movement position, and enables accurate measurement of workpieces over a wide range. The purpose is to provide a measurement and sizing device.

[Means for solving problems]

In order to achieve the above object, the present invention disposes a detector having a contact in front of a moving piece, and moves this moving piece by a feed screw along a guide rail arranged in parallel with the feed screw. The wide range measurement and sizing device is characterized by comprising a locking mechanism that is fixedly disposed on the movable piece and that clamps the guide rail between the movable piece and fixes the movable piece to the guide rail during a locking operation. There is.

[Effect]

According to the present invention, when a movable piece equipped with a detector is movable along a guide rail and a detector is fixed together with the movable piece, a lock mechanism fixed to the movable piece is operated and the movable piece is moved along a guide rail. The rail is held between the lock mechanism and the movable piece, and the movable piece is securely fixed to the guide rail, allowing accurate measurement over a wide range.

〔Example〕

Preferred embodiments of the wide range measurement and sizing device according to the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is an overall configuration diagram of the wide range measurement and sizing device according to the present invention, and Fig. 2 is an A-A diagram in Fig. 1.
A cross-sectional view along the line, Figure 3 is B-B in Figure 1.
It is a sectional view along a line.

In FIG. 1, the rotational power of a motor 10 is transmitted to a feed screw 14 via a timing belt 12. The feed screw 14 is a screw 14 in the vertically opposite direction.
A and 14B are cut, and these screws 14
A pair of upper and lower movable pieces 20, 20 are screwed into A and 14B, respectively, by nuts 22 fixedly disposed within the movable pieces. The nut 22 inside the moving piece is a rotation stopper 24 that engages with the through hole of the V-groove rail 30.
is fixed.

Further, the pair of upper and lower movable pieces 20, 20 are accurately guided in the vertical direction by a V-groove rail 30 arranged in parallel with the feed screw 14. That is, this V-groove rail 30 has a V-groove as a guide groove formed by tapered surfaces 30A and 30B, as shown in FIGS. A through hole 32 is formed at the bottom of the V-groove (see FIG. 3). On the other hand, a V-shaped protrusion is formed on the moving piece 20 by tapered surfaces 20A and 20B, and the tapered surfaces 20A and 20B of the V-shaped protrusion are connected to the tapered surfaces 30A and 3 of the V-groove of the V-groove rail 30.
It is formed so as to be in sliding contact with 0B.

Further, a detector 40, which will be described later, is attached to the pair of upper and lower moving pieces 20, 20 via detector mounting rods 26, 26, respectively, and a moire reading head 50 is disposed on the upper moving piece, and a moire reading head 50 is disposed on the upper moving piece. A moiré scale 52 is provided on the side moving piece. Further, the pair of upper and lower moving pieces 20, 20 are provided with lock mechanisms 60, 60, which will be described later, respectively.

Detector 4 disposed on the detector mounting rod 26
0 is a lever-type detector as shown in Figure 4.
A lever 43 having a contact 41 at its tip and rotatably provided on a case 44 about a fulcrum 42, a spring 45 disposed between the lever 43 and the case 44, a damper mechanism 46, and a detector. It consists of 47.

This detector 40 is applied when measuring the diameter of a workpiece having a discontinuous cylindrical surface such as a spline, a cylindrical surface with a key groove, or a cylindrical surface with an oil hole. This is suppressed by a support mechanism. Further, the detection section 47 outputs an electric signal according to the displacement of the lever 43.

Now, the lock mechanism 60 that fixes the moving piece 20 to the V-groove rail 30 is mainly composed of an air cylinder 62,
The air cylinder 62 includes an air supply device (not shown) that supplies compressed air to the air cylinder 62 via an air supply line 64.

In the air cylinder 62, a cylinder portion 62A opposes the moving piece 20 via the V-groove rail 30, and a piston rod 62B thereof is inserted into the through hole 3 of the V-groove rail 30.
2 to the movable piece 20.

Further, holding members 70, 70 are arranged on the moving piece 20 so as to hold the V-groove rail 30, and this holding member 70 is provided with a holding roller 72 that rolls on the back surface of the V-groove rail 30. A holding spring 74 is disposed between the member 70 and the movable piece 20. Therefore, the moving piece 20 is urged toward the V-groove rail 30 side, and the tapered surface 20 of the moving piece 20
A, 20B is the tapered surface 30A of the V-groove rail 30,
30B, which provides high straightness.

In addition, the tapered surfaces 30A and 30B of the V-groove rail 30
If you attach a fluorine synthetic resin sliding member to the
This helps absorb vibrations of the movable piece 20, and allows the movable piece 20 to slide more smoothly. Further, a shielding plate 65 is attached to the air cylinder 62, and photo interrupters 66A, 6 are attached to the main body side.
6B is installed. Therefore, it is possible to detect that the moving piece 20 has reached the stroke end by the detection outputs of these photo interrupters 66A and 66B.

Next, the operation of the wide range measurement and sizing device configured as described above will be explained.

When measuring the outer diameter of a workpiece having a discontinuous cylindrical surface, the detector 4 is attached to the detector mounting rod 26.
0 is attached. Incidentally, FIG. 1 shows the position where the pair of upper and lower moving pieces 20, 20 are spaced apart from each other.

Here, when a start signal for measuring the diameter of the workpiece is input, the motor 10 rotates, the feed screw 14 rotates via the timing belt 12,
The movable pieces 20, 20 are moved in a direction toward each other. At this time, the contact positions of the upper and lower movement detectors 40 are set in advance at equal positions with respect to the workpiece.

When the upper and lower detectors 40 approach each other and it is detected that one of the detectors has contacted the workpiece (this can be detected by a differentiation circuit that differentiates the signal from the detector 47 of the detector 40). ), the preset amount is delivered from there, or one of the detectors reaches zero and the set amount is delivered from there. This feeding of the set amount is performed based on the read value from the moire reading head 50. Note that the setting amount depends on the machining allowance of the workpiece.

When the feeding of the set amount is completed, motor 1
0 is stopped, and the moving piece 2 is moved by the lock mechanism 60.
0 to the V-groove rail 30. That is, the air pressure chamber 62C between the piston and the cylinder of the air cylinder 62
Compressed air is sent to move the cylinder section 62A to the V-groove rail 30 side, and the V-groove rail 30 is sandwiched between the moving piece 20 and the cylinder section 62A. Thereby, the movable piece 20 is fixed to the V-groove rail 30 together with the air cylinder 62.

Then, when the required measurement is completed, the supply of compressed air is stopped, and the cylinder part 62A is released by the return spring 6.
2D, the movable piece 20 is returned in the direction away from the V-groove rail 30, and the movable piece 20 becomes movable in the vertical direction along the V-groove rail 30 again.

In this embodiment, a sizing device having a pair of upper and lower moving pieces has been described, but the present invention can also be applied to a one-point sizing device that moves one moving piece. Also, in this embodiment, a V-shaped groove was formed on the guide rail side and a V-shaped protrusion was formed on the moving piece side, but conversely, a V-shaped protrusion was formed on the guide rail side and the moving piece The same purpose can be achieved by forming a V-groove on the piece side.

[Effect of idea]

As explained above, according to the wide range measurement and sizing device according to the present invention, the locking mechanism fixedly disposed on the movable piece holds the guide rail between the locking mechanism and the movable piece during the locking operation. As a result, the detector can be securely fixed to the guide rail together with the movable piece, and this prevents erroneous measurements of the moving position of the detector mounting part even when measuring discontinuous surfaces, and can be used over a wide range. Accurate dimensional measurements can be made. Furthermore, the locking mechanism allows the moving pieces to be locked and unlocked instantaneously, which has the advantage of good operability.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of a wide range measurement and sizing device according to the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a B-- FIG. 4 is a cross-sectional view taken along line B, FIG. 4 is a diagram showing an example of a detector attached to the device shown in FIG. 1, and FIG. 5 is an overall configuration diagram showing an example of a conventional sizing device. 10...Motor, 12...Timing belt,
14...Feed screw, 20...Movement piece, 20A, 2
0B, 30A, 30B...Tapered surface, 30...V
Groove rail, 40...Detector, 41...Contactor, 4
3... Lever, 46... Damper mechanism, 47... Detection section, 50... Moire reading head, 52... Moire scale, 60... Lock mechanism, 62... Air cylinder, 62A... Cylinder part, 62B... …
Piston rod, 62D... Return spring, 70...
Holding member, 72...Holding roller, 74...Holding spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A detector having a contact is disposed in front of a moving piece, and the moving piece is moved by a feed screw along a guide rail installed in parallel with the feed screw. A wide range measuring and sizing device according to the present invention, which includes a locking mechanism for fixing the movable piece to the guide rail during a locking operation, comprising a cylinder fixedly disposed on the movable piece, and a cylinder fixedly disposed on the movable piece; 1. A wide range measuring and sizing device comprising a locking mechanism comprising a fluid supply means for sandwiching the guide rail between a moving piece and a cylinder. (2) The wide range measurement and sizing device according to claim 1, wherein the detector is a lever-type detector, and is provided with a damper mechanism for suppressing changes in amplitude thereof. (3) The feed screw is threaded in opposite directions upwardly and downwardly, and the movable piece is a pair of upper and lower movable pieces that are screwed together with these screws and move in opposite directions. Wide range measurement and sizing device described in (1). (4) A scale is disposed on one side of the moving piece,
The wide range measurement and sizing device according to claim (3) of the utility model registration, wherein the other moving piece is provided with a reader thereof. (5) The guide rail is formed with a continuous V groove or V-shaped protrusion in the guide direction, and the movable piece has a V-shaped protrusion or V-groove that slides into contact with the V groove or V-shaped protrusion of the guide rail. A wide range measurement and sizing device as set forth in claim (1) of the utility model registration. (6) A through hole is formed in the guide rail in its longitudinal direction over at least a movement section of the moving piece, and the cylinder portion of the cylinder faces the moving piece via the guide rail, and the piston rod is The wide range measurement and sizing device according to claim 1, which is disposed on the movable piece through a through hole formed in the guide rail. (7) The wide range measurement and sizing device according to claim (6), wherein the cylinder is provided with a return spring that urges the cylinder portion away from the guide rail. (8) A wide range of utility model registration claims set forth in claim (6), wherein a holding spring is disposed between the movable piece and the cylinder portion of the cylinder to urge the movable piece toward the guide rail. Measuring and sizing device. (9) The wide range measuring and sizing device according to claim (6) of the registered utility model, wherein the cylinder portion of the cylinder is provided with a holding roller that comes into contact with the guide rail.