JP2552662Y2 - Inspection jig - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection jig mainly used for positioning a measuring instrument such as a zero gauge.

[0002]

2. Description of the Related Art Conventionally, for example, a zero gauge 31 shown in FIG.
There is. FIG. 4 shows the zero gauge 31 at the time of the measuring operation. The zero gauge 31 is inserted into an inspection jig 32, and an inspection jig is previously provided near the inspection jig 32 by a reference plate (not shown). The measuring object W positioned with the tool 32 is arranged. The zero gauge 31 includes a gauge body 33 that slides on the inspection jig 32, a dial gauge 34 provided on one end of the gauge body 33, and a detector 35 detachably provided on the other end. ,
The detector 35 is guided to a predetermined position in a hole 36 which is a measurement location opening to the measurement target W. The detector 35 has a detector body 37 and a probe 38 projecting from the outer periphery of the detector body 37. The probe 38 is operated to extend in the projecting direction, and the tip thereof While the abutment is in contact with the inner peripheral surface of the hole 36, the extension amount of the tracing stylus 38, that is, the measured amount, is indicated by the dial gauge 34.

[0003] The inspection jig 32 into which the zero gauge 31 is inserted includes a jig body 39 and the jig body 3.
9 internally fitted with a lap finished inner peripheral surface
(See FIG. 5). The bush 41 has a hole 4 so that the zero gauge 31 can be inserted and removed.
The inner diameter d of 0 is set larger than the outer dimension D of the detector 35.

The zero gauge 31 has, for example, a detector 43 having a measuring element 42 for measuring the outer shape shown in FIG. 6 and a measuring element for measuring the runout shown in FIG. A plurality of types of detectors are provided, such as a detector 45 having 44. Accordingly, when measuring with different measurement dimensions or when performing different types of measurement, it is possible to perform measurement with different measurement dimensions and measurement types by replacing the detector 35 according to the purpose.

In an actual measurement operation, when there are a plurality of measurement points on the same or a plurality of measurement objects, and when the same measurement operation is performed on these objects, the mounting state of the gauge body 33 and the detector 35 is required. In order to eliminate the inherent error of the zero gauge caused by the above, one inspection jig (or hole) is provided for each measurement point, and the measurement of each measurement object is continuously performed using one zero gauge. In some cases, the same measurement target is measured using different detectors.
In this case, when the working area is not secured between the inspection jig 32 and the measurement target W (the state of FIG. 4), the zero gauge 31 is once pulled out of the inspection jig 32 and the detector 3 is detected.
After replacing 5 with another detector, it is inserted into the inspection jig 32 again.

[0006]

However, in such a conventional inspection jig 32, a plurality of detectors 35,
In order to allow the zero gauge 31 to be inserted and removed regardless of whether any of the detectors 43 and 45 is mounted, the inner diameter d of the hole 40 of the inspection jig 32 (the bush 41) should be set to the largest outer dimension D of the plurality of detectors. The hole 40 had a large diameter. For this reason, the gauge body 33 of the zero gauge 31 positioned by being inserted into the inspection jig 32 (hole 40) also has a large diameter similarly, so that the weight of the zero gauge 31 increases and the work at the time of measurement is performed. And the physical burden on the worker increases. In order to avoid this, it is necessary to avoid the use of a common inspection jig, and it is necessary to prepare a plurality of inspection jigs and zero-gauge gauge bodies corresponding to the detectors having different external dimensions.

[0007] The present invention has been made in view of such conventional problems, and in a test jig mainly used for positioning a measuring instrument such as a zero gauge, the workability at the time of measurement is not impaired and the measurement contents are not affected. It is an object of the present invention to provide an inspection jig that can be shared regardless of the method.

[0008]

According to the present invention, in order to solve the above-mentioned problems, the present invention has a hole in which a main body of a measuring device having a detector is fitted, and the measuring device inserted in the hole. In an inspection jig for guiding the detector of the detector to a predetermined position, a relief groove for allowing passage of a probe protruding from the main body of the detector when the measuring instrument is inserted is provided on an inner peripheral wall of the hole. .

[0009]

In the above construction, even if the measuring element protruding from the detector has a different protruding dimension or shape, if the inner diameter of the hole of the inspection jig is larger than the outer dimension of the main body of the detector.
The measuring instrument can be inserted and removed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an inspection jig 1 of the measuring instrument according to the present invention,
FIG. 2 shows a zero gauge 2 which is a measuring instrument inserted into the inspection jig 1. The zero gauge 2 is the inspection jig 1
Shaft-shaped gauge body 11 that slides with the gauge body 11
And a dial gauge 13 provided at the other end of the gauge body 11. The detector 12 is for measuring the inner diameter, and includes a detector main body 14 and a tracing stylus 15 protruding from an outer peripheral portion of the detector main body 14. Note that the probe 15 shown in FIG. 2 is not extended from the detector main body 14,
That is, the state before the measurement.

On the other hand, the inspection jig 1 includes a jig body 3 and a bush 4 fitted inside the jig body 3. As shown in FIG. 1, the bush 4 penetrates in the axial direction and has a hole 5 in which the gauge body 11 slides.
A flange 6 is formed at one axial edge of the zero gauge 2 into which the zero gauge 2 is inserted, and is screwed to the inspection jig main body 3 by screws 7. Fixed. The hole 5 is formed such that its inner diameter d ₁ is smaller than the outer dimension D _{1 of the} detector 12 and slightly larger than the outer dimension D ₂ of the detector main body 14, and its inner peripheral surface is wrapped. Finished. The inner peripheral wall of the hole 5 penetrates in the axial direction of the gauge body 11 similarly to the hole 5, and when the zero gauge 2 is inserted and removed from the inspection jig 1, the measuring element 15 of the detector 12 is A rectangular relief groove 8 that allows passage is formed.

The end face of the flange 6 has the hole 5
In addition, a step portion 9 in which the relief groove 8 is opened is formed, and a knock pin 10 is provided on an outer peripheral portion of the step portion 9.
The knock pin 10 regulates the axial position of the zero gauge 2 with respect to the inspection jig 1, and its tip is urged so as to protrude from the inner peripheral surface of the hole 5. A plurality of recesses (not shown) are formed on the outer peripheral surface of the gauge body 11 of the zero gauge 2.

In the above configuration, when the zero gauge 2 is inserted and removed from the inspection jig 1, the detector main body 14 of the detector 12 passes through the hole 5, and the probe 15 protruding from the detector 12 has the escape groove 8. Pass through. For this reason, the inner diameter d ₁ of the hole 5 provided in the inspection jig 1 is changed to the outer diameter D _{2 of the} detector 12.
A uniquely be determined by external dimension D ₁ of the relationship without the detector body 14, may be smaller than the outer dimensions of the detector 12. Therefore, since the outer dimensions of the gauge body 11 of the zero gauge 2 that slides with the holes 5 can be reduced to the outer diameter D ₁ of the detector body 14, the weight of the zero gauge 2 can be reduced. it can. Therefore, it is possible to improve the workability during the measurement work (see the conventional example) and reduce the physical burden on the worker.

On the other hand, if the depth dimension d ₂ of the clearance groove 8 is set to be larger in advance, the measuring element 15 may have a larger protrusion amount than the measuring element 15 from the detector body 14 before measurement. The zero gauge 2 can be inserted and removed from the inspection jig 1 even when it is replaced with a probe, that is, a detector (not shown) used when the measurement size is larger. Further, as shown in FIG. 3, if the shape of the relief groove 8 is previously formed into a semi-fan shape, the tip side has a measuring element bent in the radial direction of the axis of the gauge body 11, for example, for outer diameter measurement. The zero gauge 2 can be inserted and removed from the inspection jig 1 even when the detector is replaced with a detector for measuring the runout (see FIG. 6) or for measuring the runout (see FIG. 6). Therefore, regardless of the content of the measurement, the same inspection jig 1 can be used to position the zero gauge 2 at the time of the measurement operation, and the inspection jig can be shared. The gauge body 11 can also be shared.

[0015]

As described above, according to the present invention, in a test jig for guiding a detector of a measuring instrument to a predetermined position, when the measuring instrument is inserted into a hole in which the main body of the measuring instrument slides. Since the escape groove allowing passage of the measuring element protruding from the main body of the detector is provided on the inner peripheral wall of the hole, even if the protruding dimension and shape of the measuring element protruding from the detector are different. If the inner diameter of the hole of the inspection jig is larger than the outer dimensions of the main body of the detector, the measuring instrument can be inserted and removed.

[0016] For this reason, it is possible to reduce the weight of the measuring device by making the main body of the measuring device that slides into the hole small, to improve the workability at the time of measurement, and to reduce the physical burden on the operator. Becomes possible. In addition, by forming the relief groove in a required shape and dimension in advance, the measuring instrument can be inserted and removed from the inspection jig even when the shape and the dimension of the measuring element are different.
Therefore, it is possible to share the inspection jig irrespective of the measurement content without impairing the workability at the time of measurement.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a main part in an arrow A direction of FIG. 2 showing an embodiment of the present invention.

FIG. 2 is a partial sectional view showing a use state of the inspection jig.

FIG. 3 is an explanatory view corresponding to FIG. 1, showing another embodiment.

FIG. 4 is an explanatory diagram showing a conventional example.

FIG. 5 is an enlarged view of a main part in an arrow B direction of FIG. 4;

FIG. 6 is an explanatory diagram showing a detector for measuring the outer diameter.

FIG. 7 is an explanatory diagram showing a detector for measuring a surface runout;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 inspection jig 2 zero gauge (measuring device) 5 hole 8 relief groove 11 gauge body (main body of measuring device) 12 detector 14 detector body 15 measuring element

Claims (1)

(57) [Scope of request for utility model registration] 1. An inspection jig which has a hole into which a main body of a measuring device provided with a detector slides and guides the detector of the measuring device inserted into the hole to a predetermined position. An inspection jig, wherein an escape groove is provided on an inner peripheral wall of the hole to allow passage of a probe protruding from a main body of the detector when the detector is inserted.