JPH09126704A - Parallel spring and dimemsion measuring device using parallel spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable parallel spring, which can be assembled easily, and a dimension measuring device using the parallel spring by constructing the parallel spring of a single plate spring. SOLUTION: In the dimension measuring device, two slits 1A, 1B are formed on an elastic plate 1, and the elastic plate 1 is constructed of five components as plate springs 11-13 and connecting plate springs 14, 15. The lower part, of the elastic plate 1 and the lower parts of the plate springs 11, 12 are clamped by means of a spring presser 2 and a mounting base 4. The upper part, of the elastic plate 1 and the upper part of the plate spring 13 are clamped by means of a spring presser 3 and a contact element 5. When an object 10 to be measured is clamped by means of the contact element 5, the lower end part, of the contact element 5 overlaps the plate spring 13, and then, the contact element 5 is moved parallelly. A differential transformer is installed on the mounting base 4 so as to follow up the displacement of the plate spring, and as a result, displacement of the object to be measured is compared and measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel spring and a size measuring instrument using the parallel spring.

[0002]

2. Description of the Related Art Next, the structure of a conventional dimension measuring device will be described with reference to FIG. 5A and 5A are a side view and a front view, respectively. 6 in FIG. 5 is a movable iron core 6A and a coil 6
B is a differential transformer, 7 is a mounting base, 8 is a moving base, 9 is a contactor, and 10 is an object to be measured. Further, 16 and 17 are leaf springs, and 18 to 21 are spring retainers.

As shown in FIG. 5, the mounting base 7 is formed in a substantially inverted T shape in cross section. The differential transformer 6 is attached to the upper part of the mount 7. A first stepped portion 7A and a second stepped portion 7B which are contradictory to each other are formed in the lower portion of the mount 7. First and mutually opposite and parallel to the step portions 7A and 7B, respectively.
Side surface S1 and second side surface S2 are formed.

The movable table 8 has a lower member 8A protruding downward, and the lower member 8A abuts on the tip of the movable iron core 6A. A third side surface S3 and a fourth side surface S4, which are parallel to each other, are formed on the opposite outer walls of the movable table 8. The side surface S
The distance between 1 and the side surface S2 is the same as the distance between the side surface S3 and the side surface S4.

The leaf spring 16 connects the side surfaces S1 and S3, and the leaf spring 17 connects the side surfaces S2 and S4. The spring retainers 18 and 19 have leaf springs 1 on the side surfaces S1 and S2, respectively.
The spring retainer 2 is for attaching 6/17.
0 and 21 are leaf springs 16 and 17 on the side surfaces S3 and S4, respectively.
It is for attaching.

The contactor 9 is attached to the spring retainer 20. In the mechanism shown by the solid line in FIG. 5, if the contacts 9 are arranged at regular intervals, the mechanisms are arranged so that the contacts 9 face each other, and the measurement object 10 is inserted between the contacts 9. The outer size of the measurement object 1 can be measured. FIG. 5 shows, for example,
The outer diameter of the cylindrical object 1 can be measured.

Next, the operation of FIG. 5 will be described with reference to FIG.
FIG. 6A shows the standby state of the measured object. In FIG. 6A, the leaf springs 16 and 17 are perpendicular to and parallel to the plane of the mounting table of the mechanism.

FIG. 6A shows a state at the time of measurement. The measurement object 10 descends from the vertical direction. The contact 9 comes into contact with the measurement object 10, and the contact 9 is slightly displaced in the horizontal direction.
Since the contactor 9 and the moving base 8 move integrally, the displacement amount of the contactor 9 is calculated as the displacement amount of the lower member 8A of the moving base 8.
Interlocks with the movable iron core 6A. In this way, the outer diameter of the measurement object 10 can be comparatively measured by applying the principle of the parallel spring.

[0009]

In FIG. 5, in order to accurately move the contactor in the horizontal direction by a small amount, the parallelism or perpendicularity of the two leaf springs is accurately adjusted for assembly.
Assembly and adjustment requires considerable difficulty. In addition, slippage due to repeated use of the leaf spring with the mounting member is also a concern.

In order to solve the problems of the prior art, the present invention provides a dimensional measuring instrument using a parallel spring and a parallel spring which is easy to assemble and reliable by forming one plate spring into a parallel spring. To aim.

[0011]

In order to achieve this object, the parallel spring of the first invention has two slits 1A which are parallel to the sides of the elastic plate 1 and have the same length and the same narrow width.
1B is formed on the elastic plate 1, the portion of the elastic plate 1 having the slits 1A and the side edges 1C on both sides is a leaf spring 11, and the portion of the elastic plate 1 having the slits 1B and side edges 1D on both sides is a plate. A spring 12, a portion of the elastic plate 1 sandwiched between the slits 1A and 1B is a leaf spring 13, and a portion of the elastic plate 1 formed at the lower side of the elastic plate 1 is a coupling leaf spring 14.
The portion of the elastic plate 1 formed by the upper side is a coupling leaf spring 15, the spring retainer 2 contacts the lower surface 1E of the elastic plate 1, and the spring retainer 3 contacts the upper surface 1F of the upper portion of the elastic plate 1, The mount 4 abuts on the lower surface 1F of the elastic plate 1 except for the leaf spring 13, and the contact 5 abuts on the upper surface 1E of the elastic plate 1 except for the leaf spring 11 and the leaf spring 12, and the spring retainer 2 and The mounting plate 4 holds the coupling leaf spring 14, and the spring retainer 3 and the contactor 5 sandwich the coupling leaf spring 15. It is characterized in that it is inserted between the plate spring 13 and the plate spring 13.

In the dimension measuring instrument according to the second aspect of the invention, the differential transformer 6 including the movable iron core 6A and the coil 6B is attached to the mounting base 4, and the displacement of the movable iron core 6A follows the displacement of the third leaf spring 13. It is characterized by

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The same reference numerals are used in the drawings. FIG. 1 is an exploded perspective view showing the structure of a parallel spring of the first invention. 1 in FIG.
Is an elastic plate, 2 and 3 are spring retainers, 4 is a mount, and 5 is a contact.

In FIG. 1, a rectangular elastic plate 1 has two slits 1A.1 parallel to the sides 1C.1D of the elastic plate 1.
B is formed. The two slits 1A and 1B have the same length and the same narrow width.

The elastic plate 1 of FIG. 1 is composed of five parts. A portion of the elastic plate 1 having the lengths of the slits 1A and 1B and having the slit 1A and the side edges 1C as both side edges is referred to as a leaf spring 11. Slits 1A and 1B have the same length as slit 1B
And the side of the elastic plate 1 having both sides 1D as the both sides are the leaf spring 12
And A portion of the elastic plate 1 sandwiched by the slits 1A and 1B is a leaf spring 13.

The portion of the elastic plate 1 formed by the lower side of the slits 1A and 1B and the lower side of the elastic plate 1 is connected to the connecting leaf spring 14
And A portion of the elastic plate 1 formed by the upper side of the slits 1A and 1B and the upper side of the elastic plate 1 is referred to as a coupling leaf spring 15.

In FIG. 1, the spring retainer 2 contacts the lower surface 1E of the elastic plate 1. The spring retainer 3 is in contact with the back surface 1F of the upper portion of the elastic plate 1. The mount 4 contacts the lower surface 1F of the elastic plate 1 except for the leaf spring 13. The contact 5 contacts the upper surface 1E of the elastic plate 1 except for the leaf springs 11 and 12. The spring retainer 2 and the mount 4 sandwich the joint leaf spring 14, and the spring retainer 3 and the contact 5 sandwich the joint leaf spring 15. The front surface and the back surface of the elastic plate 1 are for convenience of distinguishing the mounting surface of the member to the elastic plate 1.

FIG. 2 is an assembly diagram of FIG. 1, and is shown in FIGS.
B is a side view and a front view, respectively. As shown in FIG. 2, the lower end of the contact 5 overlaps with the leaf spring 13, and the lower end of the contact 5 is inserted between the upper portion of the spring retainer 2 and the leaf spring 13. If the lower end of the contact 5 is previously inserted between the upper part of the spring retainer 2 and the leaf spring 13,
The leaf springs 11 to 13 can be prevented from bending on the same bending line, and the contact 5 can be translated.

FIG. 2 is a block diagram of a dimension measuring instrument using a parallel spring according to the first invention. As shown in FIG. 2, the differential transformer 6 including the movable iron core 6A and the coil 6B is attached to the mounting base 4. Since the tip of the movable iron core 6A contacts the back surface of the leaf spring 13, the displacement of the movable iron core 6A can follow the displacement of the leaf spring 13.

In the mechanism shown by the solid line in FIG. 2, the contact elements 5 are arranged at regular intervals, and the mechanisms are arranged so that the contact elements 5 face each other.
By inserting, the outer size of the object 10 can be measured. In FIG. 1, for example, the outer diameter of a cylindrical measurement object 10 can be measured.

Next, the operation of FIG. 2 will be described with reference to FIG.
FIG. 3A shows the standby state of the measured object. In FIG. 3A, the coupling leaf springs 14 and 15 are perpendicular and parallel to the plane of the mounting table of the mechanism.

FIG. 3A shows the state at the time of measurement. The measurement object 10 descends from the vertical direction. The contact 5 comes into contact with the measurement object 10, and the contact 5 is slightly displaced in the horizontal direction.
Since the contact 5 and the leaf spring 13 move integrally, the displacement amount of the contact 5 interlocks with the movable iron core 6A. In this way, the outer diameter of the measurement object 10 can be comparatively measured by applying the principle of the parallel spring.

FIG. 4 is an elastic deformation diagram of the elastic plate 1. FIG.
In, in the lower portion of the elastic plate 1, the hatched portion is the spring retainer 2
And the part sandwiched between the mounts 4 is shown. Elastic plate 1
The shaded area in the upper part of the figure shows the portion sandwiched between the spring retainer 3 and the contact 5. When a force is applied in the direction of the arrow in FIG. 4, the leaf springs 11 to 13 become parallel springs, and the joint leaf spring 14 and the joint leaf spring 15 can be moved in parallel.

In the embodiment of the present invention, the detectors are arranged on both sides of the measurement object 10 having a cylindrical cross section, but the dimension measuring device of the present invention is not limited to this embodiment. By applying the technical idea of the present invention, it is possible to use only one size measuring instrument of the present invention, rotate the side measuring object, and measure the deflection of the outer diameter. If the contact surfaces of the contact 5 are arranged in opposite directions, the inner diameter of the hole can be measured.

Further, in the embodiment of the present invention, the displacement of the contactor is comparatively measured by the differential transformer. However, the contactor can be measured by a mechanical comparator such as a dial gauge, an optical comparator, or an air micrometer. The mechanical displacement of can be measured.

[0026]

As described above, the parallel spring and the dimension measuring device using the parallel spring according to the present invention are easy to assemble and reliable because the parallel spring is composed of one elastic plate. A parallel spring and a size measuring device can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a parallel spring of a first invention.

FIG. 2 is an assembly diagram of FIG. 1, and is a configuration diagram of a dimension measuring instrument using a parallel spring.

FIG. 3 is an operation explanatory diagram of FIG. 2;

FIG. 4 is an elastic deformation diagram of the elastic plate 1.

FIG. 5 is a configuration diagram of a dimension measuring device according to a conventional technique.

FIG. 6 is an operation explanatory diagram of FIG. 5;

[Explanation of symbols]

 1 Elastic Plate 1A Slit 1B Slit 1C Side Side 1D Side Side 1E Front Surface 1F Back Side 2 Spring Presser 3 Spring Presser 4 Mounting Base 5 Contactor 6 Differential Transformer 6A Moving Iron Core 6B Coil 11 Leaf Spring 12 Leaf Spring 13 Leaf Spring 14 Coupling Leaf spring 15 Combined leaf spring

Claims (2)

[Claims] 1. An elastic plate is provided with two slits (1A and 1B) which are parallel to the sides of the elastic plate (1) and have the same length and the same narrow width.
The first slit (1A) and the elastic plate (1), which has the first side (1C) and the first side (1C) as the both sides, are used as the first leaf spring (11), and the second slit (1) is formed. The portion of the elastic plate (1) having (1B) and the second side (1D) as both sides is the second leaf spring (12), and the first slit (1A) and the second slit (1B) The portion of the elastic plate (1) sandwiched between the third plate spring (13), the portion of the elastic plate (1) formed by the lower side of the elastic plate (1) is the first
Of the elastic plate (1), which is formed by the upper side of the elastic plate (1).
The first spring retainer (2) contacts the lower surface (1E) of the elastic plate (1), and the second spring retainer (3) is the upper part of the elastic plate (1). Of the elastic plate (1) except for the third leaf spring (13), and the contact (5) of the mounting plate (4) contacts the first (1) of the elastic plate (1). Except for the leaf spring (11) and the second leaf spring (12), it contacts the upper surface (1E) of the elastic plate (1), and the first spring retainer (2) and mounting base (4) Coupling leaf spring
The (14) is clamped, and the second spring holder (3) and the contactor (5) are connected to the second coupling leaf spring.
The lower end of the contactor (5) overlaps the third leaf spring (13), and the lower end of the contactor (5) sandwiches the upper end of the first spring retainer (2) and the third leaf spring (1).
A parallel spring characterized by being inserted between 3). 2. A differential transformer (6) comprising a movable iron core (6A) and a coil (6B) is attached to a mounting base (4), and the displacement of the movable iron core (6A) is adjusted to a third leaf spring (13). The dimension measuring device using a parallel spring according to claim 1, wherein the dimension measuring device is made to follow the displacement.