JPH0124563Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a length measuring device used to measure the elongation or contraction that occurs in an object due to mechanical stress, temperature, or natural changes over time, and to display this digitally.

The length measured by a modern length measuring device is converted into the amount of light, which is extracted as an electrical signal via a photoelectric element, and this electrical signal is converted into a digital value and displayed, and if necessary, printed and recorded along with the display. However, in the past, it was difficult to measure minute lengths and it was not possible to obtain accurate length measurements.

The present invention improves this to accurately measure minute lengths of about 1/1000 mm and accurately displays digitally using a linear scale. The main body 1 is provided with a vertical hole 3 opening at its lower surface, and a horizontal hole 4 that is perpendicular to the vertical hole 3 and communicates with the intermediate portion thereof, and a sliding piece 5 having a movable measuring element 6 protruding from the lower end inside the vertical hole 3. The horizontal hole 4
The sliding piece 5 is provided so as to be movable in parallel with the sliding piece 5.
A guide rod 7 integrally connected with the guide rod 7 along the direction of movement thereof.
are movably supported by the main body 1, and elastic springs 8 and 9 having different strengths are provided at both ends thereof.
act so as to be able to adjust the springing force of at least one of them, tie the linear scale 10 to the main body 1, and position the actuating rod 11, which is to be made springy and protrude, in the horizontal hole 4, and press the tip of the linear scale 10. is brought into contact with the side surface of the sliding piece 5 in the vertical hole 3, and the fixed gauge head 12 is placed on the lower surface of the main body 1 on a line parallel to the axis of the operating rod 11 with a predetermined distance from the movable gauge head 6. It is set up.

Embodiments of the present invention will be described with reference to the drawings.

In the drawings, reference numeral 1 denotes a length measuring device main body, and a gripping member 2 is fastened to the upper part of the main body with a locking screw 2a to facilitate handling of the main body 1 during operation.

The main body 1 has a vertical hole 3 with a rectangular cross section that opens on the bottom surface.
and a horizontal hole 4 that is perpendicular to this and communicates with the intermediate part.
A sliding piece 5 having a rectangular cross section is provided in the vertical hole 3 so that both sides of the sliding piece 5 are inscribed in the hole wall surface so as to be movable in the length direction of the horizontal hole 4, and a measuring element 6 is provided protruding from the lower surface of the sliding piece 5. Therefore, the measuring element 6 can be moved within the vertical hole 3 along the length of the horizontal hole 4. Further, a guide rod 7 which is long in the moving direction is integrally connected to the sliding piece 5 with a locking screw 7a, and both ends of the guide rod 7 are supported by the main body 1 so that it moves together with the sliding piece 5. Elastic springs 8 and 9 having different strengths act on both ends of the spring 8, and on the other hand, in the illustrated example, the strength of the spring 8, which has a weaker resilient force, can be slightly adjusted by moving the adjustment screw 8a back and forth. I did it like that.

A part 1a of the main body 1 is extended, a linear scale 10 is attached to the part, and a bullet is fired (not shown).
The operating rod 11 was placed in the horizontal hole 4, and its tip was brought into contact with the side surface of the sliding piece 5 in the vertical hole 3. The linear scale 10 is commercially available, and as described later, when detecting the amount of displacement of an article, the amount of movement of the operating rod 11, which moves forward and backward, is converted into the amount of light inside the case, which is converted into an electrical signal by a photoelectric element. It is something that performs an action.

A fixed measuring element 12 is provided on the lower surface of the main body 1 and positioned at a predetermined interval from the movable measuring element 6 on a line parallel to the moving direction of the operating rod 11.

In the figure, 13 is a case for the spring 9, and 14 is a heat insulating material such as leather attached to both sides of a part of the main body 1 to prevent the heat of the hands from affecting the measurement and to prevent the adverse effects of slipping during operation. It was excluded.

The fixed measuring element 12 is arranged so that its position can be set according to the distance between two points to be measured.
A preliminary mounting hole 15 is provided.

Furthermore, in the embodiment, the movable measuring element 6 and the fixed measuring element 12 are provided with recesses 6a and 12a on their lower end surfaces, respectively.
In contrast to the measurement point of the measurement object formed by a small steel ball, etc., the recess 6a, 12a is fitted into the recess of the small steel ball, etc. of the measurement point.
Any form can be adopted as the second form.

As mentioned above, this product is used as a length measuring device that extracts the length between two points to be measured on an article as an electrical signal, and then combines it with a digital counter to directly display the measured length as a digital value. The hole 3 is arranged so that the sliding piece 5 can move from side to side within the hole 3.
The tip of the operating rod 11 of the linear scale 10 is brought into contact with the side surface of the linear scale 10, and the operating rod 11 can move left and right by its elastic force and the movement of the sliding piece 5. The springs 8, 9 and the operating rod 11 are adjusted by the adjusting screw 8a to set the zero point.
After balancing the elastic force of the main body 1 against the measuring object.
When the fixed measuring element 12 is brought into contact with a measuring point at one end of the part to be measured and the movable measuring point is moved to match the other measuring point and the movable measuring element 6 is brought into contact, the sliding piece 5 must be moved horizontally. The operating rod 11 of the linear scale 10, which is in contact with the side surface of the linear scale, moves back and forth accordingly, and the length between the two measurement points due to this movement is extracted as an electrical signal, and this can be displayed as a digital value by the digital counter A. Furthermore, by combining this with Printer B, it is possible to record the amount of length.Furthermore, as another usage mode, to measure the degree of expansion and contraction of the article, it is possible to record the length when setting the zero point as described above. The state in which the distance between the measuring element 12 and the movable measuring element 6 is regulated to the reference dimension l using a standard scale is set as 0 point and stored in the digital counter A, and then the measured length of the shrunken article is calculated. If the dimensions of the movable gauge 6 are measured when the fixed gauge head 12 is aligned with the point a and the movable gauge head 6 is aligned with the point b with two points a and b facing each other, the digital counter A is used to measure the standard. The amount of shrinkage d is displayed as a digital value by comparison with the dimensions, and the movement of the movable measuring point 6 is also performed when the measurement point b becomes longer than the reference dimension and becomes point b' due to elongation of the article. Accordingly, the amount of elongation d' is displayed as a digital value.

According to the present invention, both sides of the sliding piece 5 are in contact with the inner wall surface of the vertical hole 3, and the guide rod 7, which is integrated with the sliding piece 5, has both ends supported by the main body 1. The movement of the sliding piece 5 is precisely regulated, and as the sliding piece 5 moves, the operating rod 11 of the linear scale 10 is moved back and forth, so the length can be measured extremely precisely and precisely, and the operating rod 11 is also moved back and forth. The movement of the sliding piece 5 can be balanced with the advancing force caused by the elasticity of the operating rod 11 by adjusting the elastic force applied to both ends of the guide rod 7, which is integral with the sliding piece 5. Fine forward and backward movements can be expected, thereby allowing minute length measurements to be obtained, and when used in conjunction with a linear scale, the measured dimension length can be displayed as a digital value and has the effect of being directly readable.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing an embodiment of the length measuring device of the present invention, FIG. 2 is a bottom view thereof, and FIG. 3 is a side view showing the state of use. 1... Length measuring instrument body, 2... Grip piece, 3... Vertical hole,
4...Horizontal hole, 5...Sliding piece, 6...Movable measuring head,
7... Guide rod, 8, 9... Bullet spring, 8a
...Adjustment screw, 10...Linear scale, 11...
...Operating rod, 12...Fixed measuring point.

Claims (1)

[Scope of utility model registration request] A length measuring device main body 1 having a gripping member 2 attached to its upper part is provided with a vertical hole 3 opening at its lower surface, and a horizontal hole 4 that is perpendicular to the vertical hole 3 and communicating with the intermediate part thereof. A sliding piece 5 with a protruding movable measuring element 6 is provided movably inscribed in the horizontal hole 4 in parallel, and a guide rod 7 is integrally connected to the sliding piece 5 along the moving direction of the main body. A linear scale 10 is connected to the main body 1 by movably supporting the main body 1, and having elastic springs 8 and 9 of different strengths act on both ends of the spring so that the elastic force of at least one of them can be adjusted. The actuating rod 11 that will be fired and protruded from the horizontal hole 4
the tip of the sliding piece 5 in the vertical hole 3.
The movable measuring head 6 is placed in contact with the side surface of the main body 1.
A minute displacement length measuring instrument comprising a fixed measuring element 12 provided on a line parallel to the axis of an operating rod 11 at a predetermined interval.