JPH067292Y2 - Straightness measurement device using parallel light - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In this invention, a reference bar and an object to be measured are placed on two identically processed grooves on a block, and parallel light from a light source is applied to the reference bar and the object to be measured. The present invention relates to an apparatus for measuring the straightness of an object to be measured by moving a light source and a detector while irradiating the object.

[Prior Art] Next, a side view of a conventional apparatus will be described with reference to FIG.

In FIG. 2, 6 is an object to be measured, 7 is a light source, 8 is parallel light, 9 is a detector, 11A is a block, 12 is a guide, 13 is a rail, 14 is a stand, and 15 is a reference edge.

The block 11A is provided with a V groove, and the block 1
1A is arranged on the guide 12.

The guide 12 is movably mounted on a rail 13, and the rail 13 is fixed to a base 14.

The reference edge 15 serves as a reference for the straightness of the DUT 6, and is fixed to the base 14.

As shown in FIG. 2, the light source 7 and the detector 9 are arranged so as to surround the table 14, and emit the parallel light 8 from the light source 7 between the reference edge 15 and the DUT 6.

Next, the front view of FIG. 2 is shown in FIG.

The guide 12A and the guide 1 are provided on the rail 13 in FIG.
2B is arranged, and the lock block 11 is provided on the guide 12A.
A is placed, and the block 11B is placed on the guide 12B.

The block 11B has the same shape as the block 11A.

The block 11A and the block 11B are arranged so as to face each other, and the DUT 6 is placed on the V groove portions of both blocks.

While irradiating the DUT 6 and the reference edge 15 with the parallel light 8 from the light source 7, the light source 7 and the detector 9 are moved at a constant speed by a driving mechanism (not shown) to continuously measure the straightness of the DUT 6. To measure.

Next, a top view of FIG. 3 is shown in FIG.

In order to measure the straightness of the DUT 6 with the parallel light 8, the DUT 6 and the reference edge 15 in FIG. 4 must be arranged in parallel.

Therefore, the blocks 11A and 11B are previously
The line connecting the centers of the grooves to receive the DUT and the reference edge 1
After making 5 parallel, the to-be-measured object 6 is mounted on the block 11A and the block 11B, and the parallel light 8 is irradiated and straightness is measured.

Next, FIG. 5 shows a top view in the case of measuring the DUT 6A having a short length.

When the length of the DUT 6A is short, the positions of the blocks 11A and 11B are moved according to the length, and the DUT 6A is placed on the blocks 11A and 11B, and then the straightness is measured. To do.

[Problems to be Solved by the Invention] In order to measure the straightness with high accuracy, when the blocks 11A and 11B are moved, they must be moved with respect to the reference edge 15 within the measurement accuracy. There is a problem in that 11A and the block 11B must be precisely adjusted by a high-precision guide so that they remain parallel to each other.

It is an object of the present invention to provide a measuring device that can easily measure the straightness of a measured object without precisely adjusting the position of the block when measuring the straightness of the measured object.

[Means for Solving the Problem] In order to achieve this object, according to the present invention, a first block having a first groove for mounting an object to be measured and a second groove for mounting a reference bar, and an object to be measured are provided. A second block having a first groove for mounting and a second groove for mounting a reference bar, a first guide for mounting the first block, and a second block for mounting the second block.
Guide, a rail for moving the first guide and the second guide, a light source for irradiating the object to be measured placed in the first groove and a reference bar placed in the second groove with parallel light, and the object to be measured. An object and a detector for receiving parallel light that has passed through the edge of the reference bar.

Next, a configuration diagram of the straightness measuring device according to the present invention will be described with reference to FIG.

In FIG. 1, 1 is a block, 2 is a guide, 3 is a rail, 4 is a base, 5 is a reference bar, and others are the same as those in FIG.

The block 1A of FIG. 1 is provided with two V-grooves and is arranged on the guide 2.

The guide 2 is mounted on a rail 3 so as to be movable, and the rail 3 is fixed on a base 4.

The two V-grooves provided in the block 1A are the same processed, and the reference bar 5 is placed on one V-groove and the object to be measured is placed on the other V-groove, and both V-grooves are placed. The parallel light 8 is emitted from the light source 7.

The reference bar 5 corresponds to the reference edge 11 in FIG. 2 and is precisely machined.

Next, a top view of FIG. 1 is shown in FIG.

Since the reference bar 5 and the DUT 6 are placed on the blocks 1A and 1B for measurement, the positional relationship between the reference bar 5 and the DUT 6 remains parallel even if the positions of the blocks are deviated. .

Further, as shown in FIG. 7, the length of the object to be measured 6B is short, and even if the positions of the blocks 1A and 1B are moved, the reference bar 5A and the object to be measured 6B are the blocks 1A and 1B.
It remains parallel and does not require precision adjustment.

The shapes of the grooves provided in the blocks 1A and 1B are V grooves in FIG. 1, but other shapes may be used.
It is only necessary that the grooves provided on the left and right blocks have the same processing. Further, the number of grooves provided in the block may be two or more.

[Advantage of Invention] According to this invention, since the straightness is measured by mounting the reference bar and the object to be measured in the two grooves provided in the block, the reference position can be adjusted without adjusting the position of the block precisely. Since the bar and the object to be measured are in parallel to each other, the straightness can be measured easily and precisely.

[Brief description of drawings]

FIG. 1 is a block diagram of a straightness measuring device according to the present invention, and FIG.
FIG. 3 is a block diagram of a conventional device, FIG.
2 is a top view of FIG. 2, FIG. 5 is a top view of a state where the block is moved, FIG. 6 is a top view of FIG. 1, and FIG. 7 is a top view of the state where the block is moved. 1 ... Container, 11A, 11B ... Block, 12 ... Guide, 13 ... Rail, 14 ... Stand, 15 ... Reference edge.

Claims (1)

[Scope of utility model registration request] 1. A first block having a first groove for mounting an object to be measured and a second groove for mounting a reference bar, and a first groove for mounting an object to be measured and a second groove for mounting a reference bar. A second block, a first guide for mounting the first block, a second guide for mounting the second block, a rail for moving the first guide and the second guide, and a first groove. A light source for irradiating the object to be measured placed on the substrate and the reference bar placed in the second groove with parallel light; and a detector for receiving the parallel light passing through the edges of the object to be measured and the reference bar. Straightness measuring device using parallel light.