JP2000161901A - Measurement instrument with linearly moving gauge head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure a length of not more than a predetermined length and a shape by projecting a gauge head to a body and setting a means linearly moving the gauge head and a mechanism transmitting linear motion of a gauge head to a scale plate on the body. SOLUTION: A body 1 is provided with an external frame 3 on an upper face, a base end shaft cover 6 on a front face, a side face cover 2 on a side face. A scale plate 4 and a pointer 5 are stored in the frame 3, where the movement of a joint 7 projected out of the cover 6 and a gauge head 8 is transmitted. The joint 7 and the gauge head 8 are fixed with a screw thread, where the gauge head is exchangeable and the joint 7 is connected to a base end shaft 9, that is tightened with friction with holding between a base plate A10 and a base end shaft pressing block 19 to rotate the gauge head 8 while overcoming frictional force and set it at desired angle. The gauge head 8 can be moved linearly with the base plate A10 on movable side 13 of a directly operated bearing and a base plate B11 to a fixed shaft 12 of the directly operated bearing placed. A spring column B16 is placed on the base plate B11, and a spring column A17 is placed on the base plate A10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring instrument for measuring the height of a measuring element by bringing the tip of the measuring element into contact with an object to be measured and transmitting the movement to an instrument such as a scale plate.

[0002]

2. Description of the Related Art A lever gauge that has been used as a dial gauge for a long time has a structure in which a measuring element is circularly moved around a base axis as a fulcrum, and the movement of the measuring element is enlarged with a lever and read with a pointer. Has become. The length of the stylus is affected by the enlargement ratio, and if a stylus having a length that does not match the ratio is attached, the stylus cannot be accurately enlarged and cannot be read.

Therefore, when it is desired to change the length of the tracing stylus depending on what is to be measured, it is necessary to prepare a large number of types having different magnification ratios.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to overcome the idea of the conventional lever type dial gauge in which the tracing stylus moves in a circular arc, and to linearly move the tracing stylus so as not to be affected by the leverage enlargement ratio. A fixed length probe (base shaft cover 6
If it comes out of 50 mm or less), it is possible to attach a measuring element of any length and shape, and by making the measuring element exchangeable, all measurements can be performed with one unit. To provide equipment.

[0005]

According to the present invention, the main body is provided with a means for projecting a probe on the main body, and means for linearly moving the probe and a mechanism for transmitting the linear motion of the probe to the scale plate. is there.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific configuration of a measuring instrument having a linearly-moving probe according to the present invention will be described.

1, 2, and 3 will be described with reference to FIG. 1, FIG. 2, and FIG.
b, the base shaft cover 6 is attached, and the side surface 2 is attached to the side surface 1c. A scale plate 4 and a pointer 5 are stored in the outer frame 3, and transmit the movement of a joint 7 and a tracing stylus 8 projecting from a base shaft cover 6.

FIG. 4 shows an internal configuration for transmitting the movement.
FIG. 5 will be described.

The joint 7 and the tracing stylus 8 are fixed with screws so that the tracing stylus 8 can be replaced. The joint 7 is connected to the base shaft 9, and the base shaft 9 is connected to the base plate A 10 and the base shaft holding block 19. The stylus 8
Can be set to a desired angle a (FIG. 7) by turning over the friction (about 3.0 N or more). The base plate A10 is attached to the movable linear bearing 13 and the base plate B11 attached to the body 1 is fixed to the linear bearing fixed side 12.
The vertical movement of the tracing stylus 8 becomes possible by attaching it to the A spring column B16 is attached to the base plate B11.
By attaching the spring column A17 to the coil 10 and hooking the coil spring 18 between the spring column A17 and the spring column B16, a measuring force (approximately 0.3N) is generated below the tracing stylus 8 in the vertical direction, and measurement can be performed. . The range (amount) of movement in the vertical direction can be adjusted by a stopper plate 14 attached to the base plate A10 and a stopper screw 15 attached to the main body 1.

[0010] The expanded configuration of reading will be described.
When the tracing stylus 8 moves vertically, the rack piece 20 attached to the base plate A10 also moves in the same vertical direction and is transmitted to the small gear A21 which is axially mounted on the main body 1 and the bearing metal 22, and the crown gear 23 fixed coaxially with this. Rotates. The enlarged rotation is transmitted to the small gear B24 stored in the outer frame 3 through the crown gear 23, and the slight movement of the tracing stylus 8 is equally divided on the scale plate 4 by the pointer 5 fixed coaxially with the small gear B24. Can read.

With the above-described configuration, the conventional lever-type dial gage eliminates an enlarged configuration by leverage, and the length of the tip of the tracing stylus 8 from the base shaft 9 to the desired length (from the base shaft cover 6) Can be set to less than 50mm).

Therefore, by fabricating and replacing the measuring element 8 according to the shape to be measured, the needle-shaped measuring element 2 as shown in FIG.
5 enables measurement of runout in a narrow groove width portion. Further, as shown in FIG. 7, by combining the offset measuring element 26 (the measuring element with an angle and the mounting rotation direction freely), the measuring instrument can easily measure the continuous step (thickness) without being obstructed by the object to be measured.

[0013]

According to the present invention, the measuring element of this mechanism performs a linear movement with respect to the conventional measuring element rotating movement, so that the measuring element length (exiting from the base shaft cover 6) is 50 mm or less. In this case, a probe having any length and shape can be attached. Therefore, the mechanism of the present invention can cope with all kinds of measurements, even if the measurement cannot be performed unless a large number of types having different lengths of the measuring elements are conventionally prepared, by replacing various measuring elements with one unit.

Therefore, its practical value is extremely large as compared with the conventional lever type dial gauge. In addition, even if a measuring element having a value indicated on the scale on the scale plate and having any shape length is attached, accuracy can be guaranteed without being affected by the gear expanding mechanism.

[Brief description of the drawings]

FIG. 1 is a plan view.

FIG. 2 is a side view.

FIG. 3 is a rear view.

FIG. 4 is a cross-sectional view.

FIG. 5 is a vertical side view.

FIGS. 6A and 6B are a plan view and a side view showing a measurement state by a needle-shaped measuring element. FIGS.

FIG. 7 is a side view showing a measurement state by a normal tracing stylus.

FIG. 8 is a side view showing a state of measurement by an offset tracing stylus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Side cover 3 Outer frame 4 Scale plate 5 Pointer 6 Base shaft cover 7 Joint 8 Measurement element 9 Base shaft 10 Base plate A 11 Base plate B 12 Linear bearing fixed side 13 Linear bearing movable side 14 Stopper plate 15 Stopper screw 16 Spring column B 17 Spring column A 18 Coil spring 19 Base shaft holding block 20 Rack piece 21 Small gear A

Continuation of the front page F term (reference) 2F061 AA16 DD22 FF07 FF18 FF22 FF24 FF31 FF46 FF56 FF64 FF72 GG01 GG36 HH51 JJ13 JJ22 JJ67 SS02 SS45 VV13 VV16 VV48 2F062 AA21 CC22 EE01 H23 H18 H25 H18 H22 H05

Claims (1)

[Claims] A measuring instrument having a means for projecting a probe on a main body and linearly moving the probe, and a linearly-moving probe provided with a mechanism for transmitting the linear motion of the probe to a scale plate.