JPS5825281Y2 - micrometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a micrometer that measures an object to be measured quickly and accurately.

In conventional micrometers, a female thread is cut on the inner peripheral surface of the inner cylinder, and a male thread is cut on the spindle, and the spindle is screwed into the inner cylinder to displace the spindle relative to the inner cylinder. The object to be measured was measured using an anvil installed at the

However, since the pitch of the thread of the micrometer is shortened due to its function, the amount of displacement of the spindle caused by rotation of the spindle is minute, which increases the time required for measurement, making measurement work inefficient. Met.

Furthermore, in order to keep the degree of displacement of the spindle constant, the pitch between the screw threads had to be constant, which inevitably required skill in machining the screws.

Furthermore, if the threads are chipped, the degree of displacement of the spindle will be uneven, and in this case, the threaded part, the inner cylinder, is fixed to the micrometer body, so the threaded part of the inner cylinder will be uneven. The micrometer cannot be easily replaced, and it is difficult to make the parts that make up the micrometer compatible.

The present invention solves the above problems by configuring the spindle to be displaced with respect to the inner cylinder against the spring force of the spring, and by using a combination of rollers and belts to reduce the amount of minute displacement of the spindle. This is characterized by the fact that it is detected.

An embodiment of the present invention will be described below with reference to the drawings.

1, 2, and 3, the base end 3a of the inner cylinder 3 is fixed to the other arm 2 of the U-shaped frame 1, which is equipped with an anvil (as shown) on one arm. The end 3b side of the cylinder is cut in half to form a half-moon shape, and the inner cylinder 3 is equipped with a sinful 4 so as to be movable along the inner cylinder 3.

Further, the base plate 5 is held parallel to the cut surface 3c of the inner cylinder 3 formed in a half-moon shape, and the base plate 5 is fixed to the end 3b side of the inner cylinder 3,
A space 6 extending along the axial direction of the inner cylinder 3 is formed between the base plate 5 and the cut surface 3c of the inner cylinder 3.

Then, a guide groove T is formed in the axial direction as shown in FIGS. 3 and 4.
' A frame 1 provided with a frame 1 is slidably inserted into the space 6, a spindle 8 is fixed to the iron frame 7, and the spindle 8 is supported by the inner cylinder 3 so as to be movable relative to the annovil, and Fix the frame I to the simple 4.

Further, a spring S is interposed between the inner cylinder 3 and the simple 4, and the spring S always urges the simple 4 in a direction in which the spindle moves away from the anobile.

Further, within the guide groove 1' of the frame T, as is clear from FIG. 10, and the first roller 9 is rotatably supported by the base plate 5 which is integrated with the inner cylinder 3.

This 20th roller 10 is provided with a diameter larger than the gap formed between one side of the guide groove γ' and the 10th roller.

Furthermore, the axis of the second roller 10 is parallel to that of the first roller 9, and the second roller 10 is movable in the longitudinal direction of the guide groove 1'.

As shown in FIG. 1M3 and FIG.
The belt 11 is wound in an S-shape so as to be pressed toward the gap between the zero roller 9 and one side of the guide groove T'.

Both ends of this belt 110 are fixed to both ends of the guide groove 7' in the longitudinal direction while the belt 11 is kept under tension.

Note that the belt 11 is made of a flexible material.

In this case, as is clear from the figure, the rollers 9 and 1
By fixing both ends of the belt 11 to both ends of the guide groove 1' while keeping the belt 11 wound in an S-shape under tension, a part of the belt 11 is attached to the rollers 9 and 10 and the rollers. 10 and the side surface of the guide groove T'.

This is because, as is clear from the figure, the sum of the diameters of the rollers 9 and 10 and the thickness of the belt 11 is greater than the width of the guide groove T.

Further, a roller bearing 12 is fixed to the end 3b side of the inner cylinder 3, and the roller bearing 12 rotatably supports two rollers 13 and 14 having different diameters, so that the large diameter roller 13 is attached to the roller 9. A small diameter roller 14 is connected to the pointer 16 of a dial gauge 15 which is connected and attached to the inner cylinder 3.
As shown in the figure, a flexible belt 17 is passed between two rollers 13 and 14.

A roller 18 brought close to the roller 13 is rotatably supported by the roller bearing 12, and the roller 13 is connected to the roller 13 from the outside.
A roller 19 is provided so as to be movable forward and backward toward the belt 17, and the tension of the belt 17 is adjusted by both rollers 18 and 19.

The operation of the micrometer according to the present invention will be explained below.

When the simple 4 is moved toward the anvil side along the inner cylinder 3, the frame T moves together with this, and the spindle 8 advances toward the anvil side.

When the frame 7 moves, the rollers 9 and 1 are moved by the belt 11.
0 rotates, and the roller 13 connected to the roller 9 rotates.

Since the belt 17 is suspended between the rollers 13 and 14, as the roller 13 rotates, the roller 1
4 rotates, causing the pointer 16 of the dial gauge 15 to rotate.

At this time, among the displacement amounts of the spindle 8, integer measured amounts are read by the scale of the sleeve 20 mounted on the inner cylinder 3 and the edge 4a of the simple 4, and fractional measured amounts are read by the scale by the pointer 16 of the dial gauge 15. Displayed on the board (as shown).

Furthermore, when the force applied to the simple 4 is removed, the simple 4 returns to its original position due to the spring force of the spring S.
The spindle 8 moves into the inner cylinder 3.

As explained above, in the present invention, the spindle is held by the frame so as to be slidable relative to the anvil, and the spindle is biased by a spring in the direction of moving away from the anvil, thereby creating a gap between the anvil and the spindle. Since it is configured so that it is always open to the maximum, it is possible to easily insert the object to be measured between the anobile and the spindle. Moreover, by suppressing and displacing the spindle toward the anobile side against the spring force, the object to be measured can be An object can be brought into contact between the anobyl and the spindle easily and quickly, and furthermore, when the pressing force is released, the object can be automatically returned to its original state by the force of the spindle spring.

This speeds up the movement of the spindle and reduces measurement work time.

Furthermore, since the movement of the spindle is magnified and transmitted to the needle using only the roller and belt, the movement of the spindle can be accurately transmitted to the pointer in a magnified manner with a small number of parts without the need for backlash removal means.

In addition, in order to convert the movement of the spindle into rotation amount, one of the two rollers disposed in the guide groove is rotatably supported by the inner cylinder, and the other roller is movable in the longitudinal direction of the guide groove. By keeping the wound belt wound in an S-shape between these two rollers under tension, and fixing both ends of this belt to both ends of the guide groove, a part of this belt can be Since it is configured to be held between two rollers and between the other roller and the side surface of the guide groove, no undue force is applied to the rollers and the belt.

Moreover, with a simple configuration, the amount of movement of the spindle can be reliably converted into the amount of rotation without slipping.

Furthermore, this configuration has the advantage that assembly can be easily performed because there are few direct attachment parts for individual members.

Moreover, it does not require precise screw processing, making it easy to manufacture.

It also facilitates product compatibility.

[Brief explanation of the drawing]

FIG. 1 is a front view of a micrometer according to the present invention. Fig. 2 is a cross-sectional view of Fig. 1, Fig. 3 is a sectional view taken along ■-m of Fig. 1, Fig. 4 is a plan view of the frame, and Fig. 5 is a cross-sectional view taken along ■-■ of Fig. 4; FIG. 6 is a sectional view taken along line Vl-VI in FIG. 1...U-shaped frame, 3...Inner cylinder,
4... Sleeve, 1... Frame, 7/-...
...Guide groove, 8...Spindle 9,10,
13,14... Laura, 11. 17...Belt, 15...Dial gauge, 16...Pointer.

Claims (1)

[Scope of utility model registration request] An anobile is provided on one arm of the U-shaped frame, an inner cylinder is fixed to the other arm of the U-shaped frame, a spindle is slidably supported within the inner cylinder with respect to the annobil, and a frame is attached to the spindle. and the spindle is biased in a direction away from the anvil by a spring interposed between the frame and the inner cylinder, a guide groove extending in the axial direction of the spindle is provided in the frame, and the inner cylinder A tenth roller rotatably supported by the guide groove is inserted into the guide groove, and an M2 roller having a diameter larger than the gap formed between one side of the guide groove and the first roller is inserted into the guide groove. The 20th roller is inserted into the guide groove so as to be freely movable in the longitudinal direction and its axis is parallel to the first roller, and is tensioned to press the 20th roller toward the gap between the first roller and the guide groove. By winding the belt in an S-shape around both rollers so that the belt is tensioned, and fixing both ends of the belt to both ends of the guide groove, a portion of the belt can be wound around the two rollers. A roller which is sandwiched between the other roller and the side surface of the guide groove and supported by the inner cylinder is integrally provided with another roller, which is connected to the roller and has a diameter smaller than that of the roller. A micrometer characterized in that a roller with a pointer is rotatably supported by the inner cylinder, and a belt is stretched between the roller with a pointer and a roller adjacent to the pointer.