JPS592482Y2 - Auxiliary jig for caliper measurement - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an auxiliary jig for caliper measurement, and more specifically, its purpose is to provide a caliper with small measurement errors.

Conventionally, a caliper has a main scale and a sliding scale that slides using the main scale as a guide, and has a beak for measuring the inner diameter and a jaw for measuring the outer diameter at each end in the same direction. The inner diameter or outer diameter of the object is measured by holding the outer diameter of the object between the jaws or by holding the outer diameter of the object between the jaws.

Therefore, in the above measurements, it is necessary to measure the inner measurement surface and the outer measurement surface, which are composed of the beak and show of the caliper, parallel to the surface to be measured and with uniform contact pressure, which requires the skill of the measurer.

In other words, with conventional calipers, it is difficult to accurately contact the caliper with the object to be measured, so the measured inner diameter value is smaller than the true value, and the measured outer diameter value is larger than the true value, resulting in measurement errors. This required skill and resulted in poor work efficiency.

In view of the above-mentioned problems, the purpose of the present invention is to provide an auxiliary jig that allows the caliper to stably contact the object to be measured at an accurate angle and position when performing measurements using a caliper. .

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 designates a main scale of a caliper having a fixed jaw 2 on one side of one end and a fixed jaw 3 on the other side.

A sliding scale 4 is slidably inserted into the main scale 1, and a sliding jaw 5 and a sliding jaw 6 are provided on each side at one end of the sliding scale 4.
A depth spar 8 is fixedly provided at the other end to protrude from the rear end of the main scale 1 and loosely fit into a groove 7 formed along the main scale 1.

The above-mentioned caliper has an extension shaft 9 which extends linearly with the main scale 1 and is fixedly protruding from the head 1a of the main scale 1, and has a male thread that is screwed into the female thread provided on the extension shaft 9. A cylindrical bearing 10 that can rotate 360° is provided perpendicular to the extension shaft 9.

A support shaft 11 having a pointed end 11a is slidably inserted into the bearing 10, and a fixing screw 12 that moves back and forth toward the support shaft 11 with respect to the bearing 10 is screwed into the bearing 10. Become fixed or released.

Reference numeral 13 denotes a measurement surface plate, and a slide table 15 is fitted into a sliding groove 14 formed at one end of the upper surface of the surface plate 13 so as to be slidable toward the center of the surface plate 13. An elastic film 16 made of rubber, soft synthetic resin, or the like is adhered to the upper surface of the sliding table 15.

Further, on the upper surface of the surface plate 13 on the side of the sliding groove 14, a positioning bevel table 17 is fixed, in which two square shaft members are opened at the same angle from the sliding direction of the sliding table 15 and bent. Become.

Note that a in the figure is the object to be measured.

As shown in FIG. 2, the caliper and its measurement auxiliary jig having the above-mentioned configuration are arranged so that the object to be measured a is placed in contact with the bevel stand 17 of the surface plate 13, and the height of the measurement area and the beaks 2, 5 are measured.
Alternatively, the position of the spindle 11 is adjusted according to the relationship between the jaws 3 and 6, and the main scale 1 is set parallel to the surface plate 13 to measure multiple objects a at the same location. .

That is, the tip 11a of the support shaft 11 is applied to the elastic coating 16 of the sliding table 15, and the beaks 2, 5 are attached depending on the type of measurement.
Alternatively, the jaws 3 and 6 are brought into contact with the measuring part of the object to be measured a, and the spindle 11 moves in the diametrical direction of the object to be measured as the slide table 15 slides, and the main scale 1 is constantly moved to the measuring point of the object to be measured. It can be positioned diametrically above object a.

Therefore, if the measurer concentrates on keeping the main scale 1 parallel to the surface plate 13 while resting the load on one end of the caliper on the spindle 11, it is possible to obtain measured values with small measurement errors.

Next, FIG. 3 shows another embodiment of the present invention. In this embodiment, a bearing bracket 9a is attached to one side of the sliding rod 4.
Oa is fixed so as to be parallel to both teeth 2, 5 and both jaws 3, 6, and a fixing screw 12 is screwed together to move forward and backward toward a support shaft 11 inserted through the bearing 10a.

Therefore, in the case of the auxiliary jig of this embodiment, the support shaft 11 is brought into contact with the sliding table 15 which is positioned on the center line inside the beveling table 17, and the length of the support shaft 11 is adjusted and fixed. Board 13
The main scale 1 is supported above in parallel, and the load of the caliper can be placed on the support shaft 11 to stably hold the caliper.

As explained above, the caliper measurement auxiliary jig of the present invention can stably support the caliper in parallel with the support shaft provided at the end of the main scale or sliding scale, and the height of the support shaft can be adjusted. Because it is flexible, it can be adapted to various objects to be measured and measurement sites.

In addition, by providing an elastic coating on the sliding table, the tip of the support shaft can be stably positioned on the center line of the bevel table without slipping, increasing measurement efficiency and at the same time improving measurement accuracy. Therefore, the practical effects of the present invention are extremely large.

[Brief explanation of drawings]

Drawings (showing an example of an auxiliary jig for measuring potholes; Figure 1 is a partially cutaway rear view of the first example;
FIG. 2 is a perspective view showing the measurement state, and FIG. 3 is a partially cutaway rear view showing another embodiment. 1...Main scale, 2,5...Beak, 3
, 6... Jaw, 4... Slide measure, 8...
...Depth spar, 9...Extension shaft, 9a.
...Bearing bracket), 10,10a...
・Bearing, 11... Support shaft, 12... Fixed screw, 13... Surface plate, 14... Sliding groove, 15... - Sliding table, 16...Elastic coating, 17...Bevel stand, a...Object to be measured.

Claims (1)

[Scope of utility model registration request] A bearing provided on a part of the main scale or sliding scale of the caliper so that it can rotate 360° with respect to the main scale or sliding scale of the caliper, and a support shaft inserted through the bearing so that it can be adjusted and fixed. , a surface plate in which a sliding table with an elastic film affixed to its upper surface is slidably fitted into a sliding groove formed in the direction of the center axis of a positioning bevel table fixed to one end of the upper surface of the surface plate. Therefore, the diameter measurement position of the annular or disc-shaped object to be measured is stabilized by applying the support shaft to the top surface of the sliding table and placing it on the top surface of the surface plate so as to contact the positioning bevel table. An auxiliary jig for caliper measurement that is characterized by the ability to measure.