JPH0622902U - Inner diameter measuring instrument - Google Patents

Abstract

(57) [Summary] [Purpose] The dial gauge is supported so that it can rotate left and right.
Moreover, it is necessary to obtain an inner diameter measuring instrument that can smoothly measure the inner diameter. [Structure] A connecting pipe is projected from the inner diameter measuring body, and a cylinder with a dial gauge is rotatably attached to the tip of the connecting pipe, and the contact point of the inner diameter measuring body and the dial gauge are contained in the connecting pipe and the cylinder. Was contacted via the measuring rod. [Effect] During measurement, the dial gauge can be rotated to a position where it is easy to see.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cylinder gauge used for measuring an inner diameter, and more particularly to an inner diameter measuring instrument in which a dial gauge provided at the tip of a cylinder is supported so as to be upside down.

[0002]

[Prior art]

 In the conventional cylinder gauge, the inner diameter measuring body is fixed to the tip of an elongated tube with a dial gauge attached, and the measuring rod inserted in the pipe and the transmission rod of the inner diameter measuring body are connected via an L-shaped cam. However, since the position of the dial gauge was constant during measurement, it was difficult to see, which was inconvenient.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide an inner diameter measuring device that supports a dial gauge so as to be rotatable left and right and that can smoothly transmit the inner diameter dimension to the dial gauge without using a cam.

[0004]

[Means for Solving the Problems]

 According to the means of the present invention, a connecting pipe is horizontally projected from an inner diameter measuring body equipped with an extendable measuring element, and a fulcrum ring provided at the lower end of a main body composed of a cylindrical body having a dial gauge attached to the tip thereof is rotated. The measuring rod is movably connected, and the measuring rod housed in the cylindrical body and the measuring element of the inner diameter measuring body are connected to the transmitting rod housed in the connecting pipe by applying a spring.

[0005]

[Action]

 When the inner diameter measuring body 12 is inserted into the hole A to be measured and the left and right tracing stylus 13 and 14 are brought into contact with the inner surfaces of the holes, the position of the tracing stylus is transmitted to the measuring rod 16 via the transmission rod 24 and the dial gauge 11 Operate. Since the main body is attached to the connecting pipe 21 so as to be upside down, the dial gauge 11 can be measured even by moving it as shown in FIG.

[0006]

【Example】

 In the figure, 11 is a dial gauge, and 12 is an inner diameter measuring body to which measuring elements 13 and 14 are attached so as to be able to expand and contract. The dial gauge 11 is attached to the tubular body 15 in which the measuring rod 16 is installed, and the tubular body 15 and the dial gauge 11 form a main body. A fulcrum ring 17 provided at the lower end of the tubular body 15 is rotatably fitted on the outer circumference of a communication pipe 21 protruding from the inner diameter measuring body 12, and further a fixing nut 23 for crimping the fulcrum ring 17 to the tip screw portion 2 of the communication pipe 21. Screw in.

A return spring 25 is acted on the transmission rod 24 housed in the communication pipe 21, and conical contact portions 26 and 27 are formed at both ends of the transmission rod 24, one 26 of which is associated with the measuring elements 13 and 14, and the other of which is 27 is brought into contact with the lower end of the measuring rod 16. The conical contact portions 26 and 27 may be formed at the lower ends of the measuring elements 13 and 14 and the measuring rod 16, and both ends of the transmission rod 24 may be left as they are without providing the conical contact portions.

[0008]

[Effect of device]

 According to the present invention, unlike the conventional cylinder gauge, there is no need to interpose an L-shaped cam, and in particular, the dial gauge rotates around the fulcrum ring, so that it can be converted to a position that is easy to measure during measurement. It is practically convenient and improves the performance as a cylinder gauge.

[Brief description of drawings]

FIG. 1 is a front view.

FIG. 2 is a partial cross-sectional view of FIG.

FIG. 3 is a side view showing a measurement state.

FIG. 4 is a partial perspective view.

[Explanation of symbols] 11 dial gauge 12 inner diameter measuring body 13, 14 measuring element 15 cylindrical body 16 measuring rod 17 fulcrum ring 21 connecting pipe 22 tip screw portion 23 fixing nut 24 transmission rod 25 spring 26, 27 conical contact portion

Claims (1)

[Scope of utility model registration request] 1. A fulcrum ring provided at the lower end of a main body composed of a tubular body having a connecting body horizontally projected from an inner diameter measuring body equipped with an expandable / contractible measuring element and having a dial gauge attached to the tip thereof. An inner diameter measuring instrument which is operably connected and in which the measuring rod housed in the cylindrical body and the measuring element of the inner diameter measuring body are connected to the transmission rod housed by a spring in the connecting pipe.