JPH07112372A - Measuring object attaching jig for inner and outer measuring device - Google Patents

Abstract

PURPOSE:To provide a measuring object attaching jig for an inner and outer measuring device which is formed so that the processing of the connection part of a measuring object is simplified and the measuring object is properly attached to a measuring device body regardless of length. CONSTITUTION:A measuring object attaching jig for an inner and outer measuring device comprises a jig body 11 wherein positioning reference surface 12B an 13B adapted to the reference surfaces 3B and 4B on the measuring object sides of measuring objects 3 and 4 are arranged in a given position relation; and a fixing tool 14 to temperature fix measuring objects 3 and 4 in a state that the reference surfaces 3B and 4B on the measuring object side are matched with the positioning reference surfaces 12B and 13B of the jig body 11. Regardless of the length of the measuring objects 3 and 4 and machining precision of a connection part, proper exchange of the measuring objects 3 and 4 is performed, and machining of a connection part between the measuring objects 3 and 4 and the measuring device body is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of measuring elements and a plurality of measuring objects such as guides for guiding these measuring elements between the measurement sites of an object to be measured, which are attached to the measuring device main body in an inner and outer side. The present invention relates to a measuring object mounting jig of a measuring device.

[0002]

2. Description of the Related Art Conventionally, an inside / outside measuring device is known in which a pair of measuring elements are brought into contact with each other between measurement sites of an object to be measured and the inner dimension and outer dimension of the object to be measured are measured from the dimension between the measuring elements at that time. ing. When measuring,
A pair of guides for guiding the pair of measuring elements between the measurement sites of the object to be measured are provided, and these guides and measuring elements are attached to the measuring device main body in parallel with each other in a protruding state. In this inside / outside measuring device, the measuring body including the guide and the stylus may be replaced with a new one. The replaced measuring body must be correctly positioned and attached to the measuring device main body. Therefore, conventionally, the connecting portion between the measuring body and the measuring device main body is positioned in a two-dimensional or three-dimensional manner such as a dovetail groove or a V groove. The shape is regulated.

[0003]

However, in the above-mentioned conventional example, there is a problem that the shape of the position-regulating member is processed with high accuracy and cost is required for the correct positioning of the measuring body. In addition, when the measuring object is replaced with a shorter one, the positional accuracy of the tip of the measuring object deteriorates even if the processing accuracy of the connecting portion is improved.

Here, an object of the present invention is to easily process a connecting portion between a measuring body and a measuring device body, and to properly attach the measuring body to the measuring device body regardless of the length of the measuring body. An object is to provide a jig for attaching a measuring body of an inside / outside measuring device.

[0005]

Therefore, a jig for mounting a measuring body of an inside / outside measuring apparatus according to the present invention is a measuring body of an inside / outside measuring apparatus for mounting a plurality of measuring bodies in parallel with each other in a state of protruding from the measuring apparatus body. A jig main body provided with a positioning reference plane that matches the measuring body side reference plane of the measuring body in a predetermined positional relationship, and the measuring body side reference plane is aligned with the positioning reference plane of the jig body. And a fixture such as a clamp screw for temporarily fixing the measuring body. Here, the measuring object is a measuring element or a guide for guiding the measuring element between the measurement sites of the object to be measured.

[0006]

In order to replace the measuring body, a new measuring body is temporarily fixed to the measuring body mounting jig by a fixture while the measuring body side reference surface is fitted to the positioning reference surface. In this state, a new measuring body is attached to the measuring device main body from which the measuring body has already been removed, and when this work is completed, the fixing tool is loosened and the new measuring body is removed from the measuring body mounting jig.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The present embodiment is a measuring object mounting jig used in an inside / outside measuring device for measuring holes in an object to be measured. Figure 1
And in FIG. 2 an inner and outer measuring device is shown. In FIG. 1, the inside-outside measuring device 1 includes a substantially cylindrical casing 2, and one end of the casing 2 has four holes 2A. A pair of measuring elements 3 that come into contact with the object to be measured so as to project from the holes 2A and a pair of guides 4 that guide the pair of measuring elements 3 between the measurement sites of the object to be measured are arranged. There is. The pair of gauge heads 3 and the pair of guides 4 are arranged in parallel with each other. The measuring element 3 and the guide 4 form a measuring body.

The pair of measuring elements 3 are each formed in a substantially prismatic shape, and a measuring sphere 3A is provided on the side surface on the tip end side. The base ends of the pair of tracing stylus 3 are attached to the arm 6 with set screws 5, respectively. In these measuring elements 3, one side surface 3B adjacent to the side surface on which the measurement sphere 3A is provided, a side surface 3C on the opposite side to the side surface on which the measurement sphere 3A is provided, and the tip surface 3D are used as the reference body side reference surface. . The casing 2 is provided with a tracing stylus drive mechanism (not shown) that reciprocates these arms 6 in the direction of approach and separation of the tracing stylus 3, and a detector (not shown) that detects the relative movement amount of the tracing stylus 3. Each of the pair of guides 4 is formed in a substantially prismatic shape, and a guide ball 4A is provided at the tip thereof. The base ends of the pair of guides 4 are attached to the arms 8 with set screws 7, respectively. These guides 4
Is one side surface 4B adjacent to the side surface provided with the guide ball 4A.
And a side surface 4C opposite to the side surface on which the measuring sphere 4A is provided.
Then, the front end surface 4D is used as the reference surface on the side of the measuring body. An unillustrated aligning mechanism that drives these arms 8 is provided in the casing 2. Here, the casing 2, the arms 6 and 8, the detector, the tracing stylus drive mechanism, and the aligning mechanism constitute a measuring device main body 9.

As shown in FIG. 2, at the time of measurement, with the axis L of the inner and outer measuring device 1 eccentric with respect to the axis M of the hole H of the object to be measured, the contact point 3 and the guide 4 are bored. Even when inserted into H, when only one guide 4 of the pair of guides 4 comes into contact with the object to be measured, the guide 4 and the probe 3 are rotated by the alignment mechanism, and the pair of probe 3 is It is guided by the axis M of the hole H of the object to be measured.

Next, the measuring body mounting jig of this embodiment will be described with reference to FIGS. FIG. 3 is a front view of the measuring object attachment jig, FIG. 4 is a side view thereof, and FIG. 5 is a perspective view thereof. In these figures, the measuring object mounting jig 10
Includes a jig body 11 having a substantially cylindrical shape.
Two positioning recesses 12 for the tracing stylus and two positioning recesses 13 for the guide are formed on the outer peripheral portion of each. The positioning recesses 12 and the positioning recesses 13 are arranged to face each other, and a straight line connecting the positioning recesses 12 and a straight line connecting the positioning recesses 13 are orthogonal to each other. The positioning recess 12 has reference surfaces 3B, 3C, 3 of the probe 3 on the side of the measuring body.
Positioning reference surfaces 12B, 12C, and 12D that coincide with D are formed. Positioning reference planes 13B, 13C and 13D are formed in the positioning recess 13 so as to coincide with the measurement body side reference planes 4B, 4C and 4D of the guide 4.

On the jig body 11, the positioning reference surface 12 is provided.
B, 12C, 12D, 13B, 13C, 13D and the measurement body side reference surface 3B, 3C, 3D, 4B, 4C, 4D is aligned with four clamp screws 14 as a fixture for temporarily fixing the probe 3 and the guide 4. It is installed. The clamp screw 14 is composed of a screw portion 14A and a photographing portion 14B, and the screw portion 14A is formed so as to extend in the direction in which the measuring body side reference surface 3B is pushed to the positioning reference surface 12B.

In order to replace the measuring element 3 and the guide 4 which are measuring objects by using the measuring object mounting jig 10 having such a structure, the positioning reference surfaces 12B, 12C, 12D, 13B,
Reference surfaces 3B, 3C, 3D, 4 on the measuring body side on 13C, 13D
With the B, 4C, and 4D fitted together, a new measuring element 3 and a guide 4 are attached to the measuring object mounting jig 10 by the clamp screw 14.
Temporarily stop. In this state, the new measuring head 3 and the guide 4 are attached to the arms 6 and 8 of the measuring device main body 9 from which the measuring head 3 and the guide 4 have already been removed by the setscrews 5 and 7. When this work is completed, the clamp screw 14 is loosened, and the new probe 3 and the guide 4 are removed from the measuring object mounting jig 10.

Therefore, according to this embodiment, in order to replace the probe 3 and the guide 4, the positioning of the probe 3 and the guide 4 that conforms to the reference planes 3B, 3C, 3D, 4B, 4C, 4D on the side of the measuring body. Reference planes 12B, 12C, 12D, 13
A jig main body 11 in which B, 13C, and 13D are provided in a predetermined positional relationship, and a positioning reference surface 12 of the jig main body 11.
B, 12C, 12D, 13B, 13C, 13D and the measurement object side reference surface 3B, 3C, 3D, 4B, 4C, 4D is aligned and clamp screw 14 for temporarily fixing the probe 3 and the guide 4
Since the measuring body mounting jig 10 including
Also, regardless of the length of the guide 4 and the processing accuracy of the connecting portion, the probe 3 and the guide 4 can be properly replaced. Therefore, since it is not always necessary to process the connecting portion between the tracing stylus 3 and the guide 4 and the measuring device main body 9 with high precision, the machining can be easily performed, and the tip end of the tracing stylus 3 and the guide 4 after the mounting. The position accuracy of is not reduced. In addition, in this embodiment, since the fixture is the clamp screw 14, the probe 3 and the guide 4 can be reliably temporarily fixed, and the structure of the measuring object mounting jig 10 can be simplified.

Incidentally, In the above-described embodiment, the measuring body is the pair of measuring elements 3 and the pair of guides 4, and the positioning recesses 12 and 13 are provided in accordance with these, but the measuring body to be mounted using the measuring body mounting jig of the present invention is If the number is plural, the type and the number thereof are not limited, and the number of the positioning recesses 12 and 13 is also not limited. In addition, the positioning recesses 12 and 13 have
Positioning reference planes 12B, 12C, 12 at three locations respectively
Although D, 13B, 13C, and 13D are formed, at least one positioning reference surface may be formed in each positioning recess. Further, although the clamp screw 14 is used as the fixture, the concrete configuration thereof is not limited as long as it is a structure for temporarily fixing the measurement body. For example, the fixture may be a toggle-type stopper or the like.

[0015]

As described above, according to the present invention, the connecting portion between the measuring body and the measuring device body can be easily processed, and the measuring body can be properly attached to the measuring device body regardless of the length of the measuring body. The effect is that you can.

[Brief description of drawings]

FIG. 1 is a perspective view of an inner-outer measuring device with a measuring body attached.

FIG. 2 is a front view for explaining the operation of the inside / outside measuring device.

FIG. 3 is a front view showing a measuring body mounting jig according to an embodiment of the present invention.

FIG. 4 is a side view thereof.

FIG. 5 is a perspective view thereof.

[Explanation of symbols]

 1 Inside / outside measuring device 3,4 Measuring element and guide 3B to 3D, 4B to 4D Measuring object side reference surface 9 Measuring device body 11 Jig body 12B to 12D, 13B to 13B Positioning reference surface 14 It is a fixture Clamp screw

Claims (1)

[Claims] 1. A measuring object mounting jig for an inner and outer measuring device, wherein a plurality of measuring objects are mounted in parallel with each other while protruding from a measuring device body, and a positioning reference surface adapted to a measuring object side reference surface of the measuring object. Inside / outside measurement characterized by including a jig main body provided in a predetermined positional relationship and a fixture for temporarily fixing the measurement body by aligning the measurement reference side with the positioning reference plane of the jig main body. Fixture for mounting the measuring body of the device.