JPH0652214B2 - Gas pressure color display - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pressure color display device for automatically displaying normal pressure, abnormally high pressure, and abnormally low gas pressure by color.

[Conventional technology]

Conventionally, as a gas pressure display device for displaying normal pressure, abnormally high pressure, and abnormally low gas pressure, as shown in FIG.
On the end plate 17 at one end of the casing 16, the casing 16
A display shaft 19 having a flange 18 arranged therein is slidably fitted, an end flange of a bellows 20 inserted into the other end of the casing 16 is fixed to the other end of the casing 16, and A shaft pushing spring 21 is interposed between the end plate 17 and the flange 18, and a display shaft 19 is provided in the casing 16 in proportion to the gas pressure acting in the bellows 20.
There is known a gas pressure display device which is configured to project from the casing 16 and determine whether the gas pressure is high or low according to the amount of projection of the display shaft 19 from the casing 16.

[Problems to be Solved by the Invention]

However, in the case of the conventional gas pressure display device, the gas pressure is judged to be high or low according to the amount of protrusion of the display shaft 19 from the casing 16, so that the normal, abnormally high and abnormally low gas pressures can be easily obtained. In addition, there is a problem that it cannot be accurately determined.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gas pressure color display device capable of easily and accurately determining a normal pressure, an abnormally high pressure and an abnormally low pressure of a gas pressure based on a change in color.

[Means for Solving the Problems]

To achieve the above object, in the gas pressure color display device of the present invention, an intermediate portion of an L-shaped lever 2 arranged in a casing 1 is pivotally attached to the casing 1 by a support shaft 3 and the casing is A pressure receiving member 4 which is deformed by gas pressure is fixed to one end of the lever 1, and the first arm 5 of the lever 2 is connected to the second arm 6 of the lever 2.
Pressing spring 7 that works to press the center of the pressure receiving member
, The display plate 8 is provided at the other end of the casing 1 so as to be movable in a direction substantially perpendicular to the first arm, and the tip end of the first arm 5 is engaged with the display plate 8. A plate body 10 having a slit 9 extending in a direction perpendicular to the moving direction of the display plate 8 is superposed on the surface of the display plate 8 and fixed to a casing 1, and the casing 1 is provided with a first lever 2 A normal pressure stop stopper 11 for engaging the arm 5 is movably attached to the first arm 5 in a direction substantially perpendicular to the first arm 5, and the stopper spring 11 works to cause the stopper 11 to project from the inner surface of the casing 1. 12 is engaged and the surface of the display plate 8 is exposed to an abnormally high pressure display color 13 inside the slit 9 when the pressure is abnormally high, and an abnormal low pressure display color 1 is exposed to the inside of the slit 9 when the pressure is abnormally low.
4 and a normal pressure display color 15 exposed in the slit 9 at normal pressure are displayed.

[Action]

When the gas pressure acting on the pressure receiving member 4 is abnormally low, the pressing spring 7 holds the display plate 8 at the abnormal low pressure position via the lever 2, and the abnormal low-voltage display color 14 is provided in the slit 9 of the plate body 10. Is exposed. When the gas pressure acting on the pressure receiving member 4 is normal, the lever 2 is rotated against the force of the pressing spring 7 and the lever 2 is rotated.
Thus, the display plate 8 is moved to the normal pressure position, and the normal pressure display color 15 is exposed in the slit 9 of the plate body 10. Further, when the gas pressure acting on the pressure receiving member 4 is abnormally high, the lever 2 is rotated against the force of the pressing spring 7 and the projecting spring 12, and the lever 2 causes the display plate 8 to malfunction. After moving to the high voltage position, the abnormal high voltage display color 13 is exposed in the slit 9 of the plate 10.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

1 to 8 show an embodiment of the present invention, in which a bent middle portion of an L-shaped lever 2 arranged in a casing 1 is pivotally attached to a casing 1 by a support shaft 3. And a pressure receiving member 4 including a diaphragm 22 made of a metal plate having a large number of concentric circular corrugated portions and a lever operating member 23 fixed to the upper surface of the central portion of the diaphragm 22.
The cylindrical portion continuously provided on the outer peripheral portion of the diaphragm 22 is fitted to the outer periphery of one end portion (lower end portion) of the casing 1 and fixed by the solder 24, and the cover 25 having a vent hole in the center is Is arranged outside the pressure receiving member 4 and is fitted and fixed to the outer periphery of one end of the casing 1, and further, the second arm 6 of the lever 2 is operated on the base end side of the first arm 5 of the lever 2. One end of the pressing spring 7 that works to press against the member 23 is engaged, and the angular shaft portion of the spring support member 26 that is engaged with the other end of the pressing spring 7 is a corner provided on the casing 1. The spring support member 2 is slidably fitted in the hole 27 and
A spring tension adjusting nut 28, which is engaged with the outer surface of the casing 1, is screwed into the male thread portion of 6.

A spring engaging arm connected to the tip of the normal pressure stop stopper 11 is inserted into a through hole 29 provided on the tip side of the first arm 5, and the stopper 11 has a large diameter portion on the base end side and a tip side. And a small diameter portion, and the casing 1 is
A stepped hole 30 extending in a direction substantially perpendicular to the first arm 5 at a position facing the through hole 29 in the first arm 5.
The stopper 11 is slidably fitted into the stepped hole 30, and one end of the protruding spring 12 is engaged with a spring engaging arm continuous with the stopper 11. The square shaft portion of the spring supporting member 31 engaged with the other end of the casing is slidably fitted into a square hole 32 provided in the casing 1, and the male screw portion of the spring supporting member 31 has a male screw portion of the casing 1. A spring tension adjusting nut 33 engaged with the outer surface is screwed, and the stopper 11 is pulled by the tension of the protrusion spring 12, and the step portion of the stopper 11 is engaged with the step portion of the stepped hole 30. At the same time, the tip of the stopper 11 moves from the inner surface of the casing 1 to the one arm 5
Is projected toward.

A display plate 8 is movably fitted in a horizontal recess provided at the other end (upper end) of the casing 1 in a direction substantially perpendicular to the first arm 5, and the tip end of the first arm 5 is Is inserted into a through hole 35 provided in a horizontal support plate 34 that constitutes the bottom plate of the recess and is also inserted into an engagement hole 36 provided in an end portion of the display plate 8, and the first The display plate 8 is moved by the rotation of the arm 5.

A plurality of slits 9 extending in a direction perpendicular to the moving direction of the display plate 8 are provided in the opaque plate body 10 fixed to the casing 1 by being superposed on the surface of the display plate 8 and spaced in the moving direction of the display plate 8. And an abnormal high pressure display color 13 exposed on the surface of the display plate 8 in the slit 9 when the pressure is abnormally high, and an abnormal low pressure display color 14 exposed in the slit 9 when the pressure is abnormally low. The normal pressure display color 15 exposed in the slit 9 at the normal pressure is displayed, and the transparent cover 37 that covers the plate body 10 is fixed to the casing 1.

In order to make the movement amount of the display plate 8 larger than the movement amount of the lever operating member 23, the distance between the contact portion of the first arm 5 and the display plate 8 and the support shaft 3 is set to the second arm 6 and the lever operating member. It is set to be larger than the distance between the contact portion 23 and the support shaft 3. For example, red is used as the abnormal high pressure display color 13, white is used as the abnormal low pressure display color 14, and green is used as the normal pressure display color 15. The casing 1 in the gas pressure color display device configured as described above is airtightly fitted and fixed to the gas pressure action opening of the gas device.

In the gas pressure color display device of the above-described embodiment, when the gas pressure acting on the pressure receiving member 4 gradually rises, the pressure receiving member 4 generates a lever pushing force proportional to the gas pressure and the second arm of the lever 2. I try to push up 6. However, since the pressing spring 7 causes the lever 2 to rotate in the direction in which the lever operating member 23 is pushed down by the second arm 6, when the gas pressure acting on the pressure receiving member 4 is an abnormally low pressure, As shown in the drawing, the tip end of the first arm 5 is engaged with one end of the through hole 35 of the support plate 34, and the first arm 5 separates from the stopper 11, and the first arm 5 causes the display plate to move. 8 is held in an abnormally low pressure position,
As shown in the figure, the abnormal low-voltage display color 14 is exposed in the slit 9 of the plate 10.

The gas pressure acting on the pressure receiving member 4 rises, and the counterclockwise turning force of the lever 2 by the pressure receiving member 4 causes the pressing spring 7 to move.
When it becomes larger than the clockwise rotation power of the lever 2 due to
The lever 2 is rotated counterclockwise by the pressure receiving member 4, and the first arm 5 of the lever 2 abuts against the tip surface of the stopper 11. However, since the stopper 11 is held by the protruding spring 12 at a position protruding into the casing 1, when the gas pressure acting on the pressure receiving member 4 is a normal pressure, as shown in FIG. In a state in which 5 abuts on the tip end surface of the stopper 11, the counterclockwise rotation of the lever 2 is stopped, and the display plate 8 is moved to the normal pressure position by the first arm 5, and the position is held, As shown in FIG. 7, the normal pressure display color 15 is exposed in the slit 9 of the plate 10.

When the gas pressure acting on the pressure receiving member 4 rises to an abnormally high pressure, as shown in FIG. 3, the pressure receiving member 4 resists the force of the pressing spring 7 and the projecting spring 12 to move the lever 2 counterclockwise. While being rotated, the stopper 11 is pushed in and moved by the first arm 5, the first arm 5 is engaged with the other end of the through hole 35, and the first arm 5 causes
The display plate 8 is moved to the abnormal high voltage position and held at that position, and as shown in FIG. 8, the abnormal high voltage display color 13 is exposed in the slit 9 of the plate body 10.

Further, when the gas pressure acting on the pressure receiving member 4 decreases, the reverse operation to the case of increasing the gas pressure is performed.

FIG. 9 shows the relationship between the gas pressure acting on the pressure receiving member 4 and the moving amount of the display plate 8. . Further, by adjusting the tension of the pressing spring 7 by the spring tension adjusting nut 28 and adjusting the tension of the protruding spring 12 by the spring tension adjusting nut 33, the display plate 8 can be moved stepwise at an arbitrary gas pressure. You can

When carrying out the present invention, as the pressure receiving member 4, a cylindrical metal bellows with closed ends may be used. Alternatively, a flange having a through hole for screw insertion may be connected to the casing 1, and the gas pressure color display device may be fixed to the gas equipment by the screw inserted through the through hole.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

When the gas pressure acting on the pressure receiving member 4 is abnormally low, the pressing spring 7 holds the display plate 8 at the abnormally low pressure position via the lever 2, and the slit 9 in the plate body 10 is held.
When the abnormal low-pressure display color 14 is exposed inside and the gas pressure acting on the pressure receiving member 4 is normal, the lever 2 is rotated against the force of the pressing spring 7 and the lever 2 is rotated.
The display plate 8 is moved to the normal pressure position by the
When the normal pressure display color 15 is exposed in the slit 9 and the gas pressure acting on the pressure receiving member 4 is abnormally high, the lever 2 rotates against the force of the pressing spring 7 and the protruding spring 12. The display plate 8 is moved to the abnormal high pressure position by the lever 2 as it is moved, and the abnormal high pressure display color 13 is exposed in the slit 9 of the plate body 10. Therefore, depending on the high, medium, and low gas pressures. By exposing the color in the slit 9 of the plate body 10, the gas pressure can be easily confirmed by the color.

Further, since the gas pressure can be displayed in color only by moving the display plate 8 a small distance, the displacement amount of the pressure receiving member 4 can be small, and at the time of normal pressure, the lever 2 is supported by the stopper 11 and The lever 2 does not support the central portion of the pressure receiving member 4 and does not displace the pressure receiving member 4, so that the durability of the pressure receiving member 4 can be improved.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view showing a state of a gas pressure color display device at abnormal low pressure, and FIG. 2 is at normal pressure. Third longitudinal side view showing the state of the gas pressure color display device, FIG.
FIG. 4 is a vertical sectional side view showing the state of the gas pressure color display device at an abnormally high pressure, FIG. 4 is a plan view of a plate body having slits, FIG. 5 is a plan view of a display plate having color display, and FIGS. FIG. 8 is a vertical sectional side view showing the positional relationship between the color display on the display plate and the slits of the plate body. FIG. 9 is a diagram showing the relationship between the gas pressure acting on the pressure receiving member and the amount of movement of the display. FIG. 10 is a vertical sectional side view showing a conventional gas pressure display device. In the figure, 1 is a casing, 2 is a lever, 3 is a spindle,
4 is a pressure receiving member, 5 is a first arm, 6 is a second arm, 7 is a pressing spring, 8 is a display plate, 9 is a slit, 10 is a plate,
11 is a stopper for stopping normal pressure, 12 is a protrusion spring, 13
Is an abnormal high pressure display color, 14 is an abnormal low pressure display color, 15 is a normal pressure display color, 22 is a metal plate diaphragm, 23 is a lever operating member, 25 is a cover, 26 is a spring supporting member, and 28 is a spring tension adjusting nut. , 30 is a stepped hole, 31 is a spring support member, 33 is a spring tension adjusting nut, 34 is a support plate,
Reference numeral 35 is a through hole, 36 is an engaging hole, and 37 is a transparent cover.

Claims (1)

[Claims] 1. An L-shaped lever 2 arranged in a casing 1 has an intermediate portion pivotally attached to the casing 1 by a support shaft 3, and a pressure receiving member 4 which is deformed by gas pressure at one end of the casing 1. Is fixed, a pressing spring 7 that works to press the second arm 6 of the lever 2 to the central portion of the pressure receiving member is engaged with the first arm 5 of the lever 2, and the other end of the casing 1 is The display plate 8 is provided movably in a direction substantially perpendicular to the first arm 5, and the tip end of the first arm 5 is engaged with the display plate 8 and extends in a direction perpendicular to the moving direction of the display plate 8. A plate body 10 having a slit 9 is formed on the surface of the display plate 8 and is fixed to the casing 1. The normal pressure stop stopper 11 that engages the first arm 5 of the lever 2 with the casing 1. But the first Mounted movably in a direction substantially perpendicular to the over arm 5, the casing 1 this to the stopper 11
The protrusion spring 12 that works to protrude from the inner surface of the slit 9 is engaged, and the surface of the display plate 8 is exposed to the abnormal high pressure display color 13 in the slit 9 at the time of abnormal high pressure and the slit 9 in the slit 9 at the time of abnormal low pressure. Abnormally low pressure display color exposed to 14
And a normal pressure display color 15 exposed in the slit 9 at a normal pressure.