JPS59575Y2 - indication mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an indicating mechanism that magnifies and displays the amount of displacement of a displacement conversion mechanism using a rotary displacement pointer. It provides an indication mechanism with

FIG. 1 is a block diagram showing an example of this type of indicating mechanism, and shows the main parts of the indicating mechanism of a pneumatic controller.

In FIG. 1, 1 is a bellow used as a displacement conversion mechanism, 2 is a link, 3 is a scale plate, 4 is an index, 5 is a pointer,
6 is an adjustment mechanism.

A movable end of the bellows 1 is connected to an adjustment mechanism 6 via a link 2.

An indicator 4 is fixed to the movable end of the pointer 5 so as to move along the scale plate 3, and the rotating shaft is connected to an adjustment mechanism 6.

In such a configuration, the amount of displacement of the bellows 1 along the axial direction is transmitted to the pointer 5 which is connected to the movable end of the bellows 1 and rotated through the link 2 and the adjustment mechanism 6, and is transferred to the pointer 5 which is rotatably displaced. It is enlarged and displayed as a change in index 4.

FIG. 2 is a configuration diagram showing an example of a conventional adjustment mechanism that constitutes such an indicating mechanism, and FIG. 2a is an overall view;
Figure 2 is an enlarged view of the main parts.

In FIG. 2, 61 is a support piece fixed to the main body of the indicating mechanism and has an adjusting screw 62 rotatably attached thereto; 63 is a sector gear arranged to be screwed into the adjusting screw 62;
4 is a member whose central part is shaped like a hairpin,
Reference numeral 65 denotes an adjustment screw screwed together to adjust the distance between both sides 64a and 64b of the central portion of the member 64.

In the member 64, there is a side 64 at the end of one side 64a.
The first bonding edge 6 is newly curved in the direction perpendicular to a.
4 C, and a second connecting side 64 d is formed at the end of the other side 64 b so as to form the same plane as the first connecting side 64 C.

One end of the link 2 is connected to the first connecting side 64C, and the rotation axis of the sector gear 63 and the pointer 5 are coaxially connected to the second connecting side 64d.

The second coupling piece 64d is rotatably attached to the support piece 61.

In the adjustment mechanism configured in this way, the adjustment screw 65
Both sides 64 of the central portion of the member 64 are rotated.
Since the distance between a and 64b, that is, the distance between connecting sides 64C and 64d changes, the span of the pointer 5 can be adjusted, and by rotating the adjustment screw 62, the support piece 61
By changing the mounting angle of the member 64 relative to the needle 5, the zero point of the pointer 5 can be adjusted.

However, such a conventional adjustment mechanism has the disadvantage that it has a relatively large number of parts, has a complicated structure, and requires a large number of manufacturing steps.

Also, an adjustment screw 65 for span adjustment and a zero point adjustment screw 62
Since the link 2 and the pointer 5 are interposed between the two, there is also a drawback that adjustment work cannot be performed from the same direction.

The present invention solves these conventional drawbacks, and will be described in detail below with reference to the drawings.

FIG. 3 is a block diagram showing an embodiment of the adjustment mechanism based on the present invention, in which FIG. 3a is an overall view and FIG. 3 is an enlarged view of a main part.

In FIG. 3, 66 is a first member formed into a substantially U-shape, and a first adjustment screw 67 for adjusting the distance between both sides is screwed between both sides 66a and 66b. A connecting side 66C is formed on the side 66a, which is bent in a direction substantially perpendicular to the side 66a.

One end of the link 2 is connected to the connecting side 66C of this member 66.

Further, a burring hole into which the adjusting screw 67 is screwed is formed on the side 66a, and a through hole into which the adjusting screw 67 is inserted is formed on the side 66b.

Reference numeral 68 denotes a second member formed into a substantially S-shape, and a second member is provided between the sides 68a and 68b at both ends so as to penetrate through the intermediate side 68C to adjust the distance between the sides at both ends. The adjusting screw 69 is screwed together with the first adjusting screw 67 in a direction that is almost perpendicular to the first adjusting screw 67, and the other side 66b of the first member 66 is attached to the side 682 at one end so that it is almost perpendicular to the side 68H. The first member 6 is attached to the side 68b at the other end.
A connecting side 68d is formed so as to form the same plane as the connecting side 66C of No.6.

Note that each curved portion is formed to be point symmetrical.

The rotating shaft of the pointer 5 is integrated with the connecting side 68d of this member 6B, and the pointer 5 is connected thereto.

In addition, through holes are formed on the sides 68a and 68C for inserting the adjustment screw 69, and on the side 68b, the adjustment screw 6 is inserted.
9 threaded burring holes are formed.

The operation of such a configuration will be explained.

First, when the adjustment screw 69 is rotated, the distance between the sides 68a and 68b at both ends of the member 68, that is, the distance between the connecting sides 66C and 68a changes, so that the span of the pointer 5 can be adjusted.

Next, when the adjustment screw 67 is rotated, both sides 6 of the member 66
Since the distance between 6a and 66b, that is, the relative angle between the connecting side 66C to which the link 2 is connected and the connecting side 68d where the rotation axis of the pointer 5 is integrated, changes, the zero point of the pointer 5 must be adjusted. Can be done.

Here, according to the present invention, since it is composed of two members molded into a predetermined shape and two adjustment screws, the number of parts can be reduced compared to the conventional structure. It is possible to simplify the configuration and reduce manufacturing man-hours.

In addition, since the adjustment screws are screwed into the sides 66b and 68a, which are perpendicular to each other, when performing zero point adjustment after span adjustment, it is only necessary to rotate the adjustment tool such as a screwdriver by approximately 90 degrees, increasing efficiency. Able to make good adjustments.

Furthermore, since the second member 68 is formed into a substantially S-shape, displacement due to the rotation of the adjustment screw 69 appears mainly in the axial direction, and interference with zero point adjustment is extremely small.

The two members may be integrally molded from a single plate as shown in FIG. 3, or may be molded separately and then joined together.

Further, in this embodiment, an example is shown in which a bellows is used as the displacement conversion mechanism, but the present invention is not limited to this, and a Bourdon tube, a force motor, or the like may also be used.

As explained above, according to the present invention, it is possible to realize a pointer mechanism with a relatively simple structure and easy span adjustment and zero point adjustment, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an example of an indicating mechanism according to the present invention, FIG. 2 is a configuration diagram showing an example of a conventional adjustment mechanism, and FIG. 3 is a configuration diagram showing an example of an adjustment mechanism based on the present invention. . 1... Bellows (displacement conversion mechanism), 2... Link, 3
...Scale board, 4.Indicator, 5.Pointer, 6.
...adjustment mechanism, 66...first member, 61...adjustment (for zero point adjustment), 68...second member, 69...adjustment (for span adjustment).

Claims (1)

[Scope of utility model registration request] In an indicating mechanism that magnifies and displays the amount of displacement of a displacement converting mechanism using a pointer that rotates, the mechanism is formed into a U-shape, and a first adjusting screw for adjusting the distance between both sides is screwed between the two sides. A first member to which a movable end of a displacement conversion mechanism is connected to the side, and a first member formed in an S-shape, with an intermediate side passing through between the sides at both ends to adjust the distance between the sides at both ends. The second adjustment screw and the first adjustment screw are screwed together in a direction perpendicular to each other, one side of the first member is connected to the other side of the first member, and the other side is integrated with the rotating shaft of the pointer. An indicating mechanism including an adjusting mechanism comprising a second member having a shape.