JPS5815660B2 - Pressure setting instruction device for pressure regulating valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure setting instruction device for a pressure regulating valve.

Conventionally, when adjusting the pressure with a pressure regulating valve, when the bundle is turned appropriately, the pressure is usually indicated on a separately installed pressure gauge.

The disadvantage in this case is that the pressure must always be maintained at the pressure regulating valve and pressure gauge, so that it is not possible to set the pressure during unloading.

Also, when changing pressure from one task to another,
It is often necessary to change the pressure depending on the work characteristics, and it is most desirable to set the expected pressure before work, but with general pressure generators, the pump is unloaded when work is not being performed. There are many things,
In such cases, it is difficult to set the pressure in advance with conventional pressure adjustment indicating devices, so adjustments must be made while working. However, with short pressurization times, it is necessary to perform the work several times to reach the desired pressure. During this period, it is expected that inconvenient situations such as defective products will occur because adjustments cannot be made.

Therefore, there is a need for a pressure setting instructing device that can set the pressure to a predetermined dial scale regardless of whether or not pressure is acting on the pressure regulating valve.

As a pressure setting instruction device for this type of pressure regulating valve, the fourth
As shown in the figure and FIG. 5, a pointer C is suspended from the bundle b of the pressure regulating valve a, and the lower end of the pointer C is inserted into the spiral notch e of the scale plate d provided on the valve body. There is a device in which the operating angle of the bundle b is indicated over several rotations by the position of the pointer C with respect to the spiral notch e (for example, Japanese Utility Model Publication No. 31-872).

However, in this conventional example, the pointer C is configured such that its base end is swingably connected to the bundle b and suspended, and its tip end is inserted into the spiral notch e. If e is distorted even slightly with respect to the spiral notch e, this pointer e will follow the bundle b and move away from the notch e.
There was a drawback that the operator had to adjust the pointer e each time the pointer e was moved, resulting in poor operability.

Furthermore, in the configuration of the conventional example described above, the distance between the bundle b and the scale plate d cannot be made very close due to its configuration, and therefore the length of the pointer e inevitably becomes long, which exacerbates the above-mentioned drawback. As a result, there is a problem in that the pressure display becomes inaccurate.

The present invention has been made in view of the above, and an object of the present invention is to provide a device that has good operability and can accurately indicate the adjustment pressure.

The above object of the present invention is achieved by the following technical means.

In other words, a drive gear and a knob are fixed to a drive shaft that is supported by a case and has one end connected to the operating shaft of the pressure regulating valve, and a rack with an indicator needle at the tip can be slid on the knob in a direction perpendicular to the shaft. This rack is connected to the drive gear via a pinion supported on the knob side, and is provided on the dial case corresponding to the indicator needle, and the tip of the indicator needle drawn by rotation of the knob is displayed on this dial plate. A spiral scale is provided along the trajectory.

The effects of the above configuration are as follows.

When the pressure adjustment valve is adjusted by turning the knob, the rotation of this knob causes the rack to protrude or retract from the knob via the drive gear and gear system, and the tip of the indicator needle at this time aligns with the scale on the dial. It moves in a spiral along the
The rotation angle of the knob during each operation, that is, the adjustment angle of the pressure regulating valve is displayed.

The present invention has the above-mentioned technical means and effects,
Regardless of whether or not pressure is applied to the pressure regulating valve, the pressure can be set in advance according to a predetermined dial scale, and the movement of the indicator needle, which is activated by the rotation of the knob, is proportional to the rotation of the knob. The present invention has an advantage in that it hardly gets in the way, improves operability as a pressure setting indicating device, and enables accurate pressure display.

Embodiments of the present invention will be described below based on the drawings.

The drive shaft 1 is rotatably supported by the case 2,
Knob 3 is also rotatably supported on case 2.
are connected in the rotational direction by serrations or the like and fixed by a nut 4.

A drive gear 5 is fixed to the drive shaft 1, and a second idle gear 6 is rotatably inserted into the drive shaft 1.

These gears 5 and 6 are each meshed with a first idle gear 8ae8b supported by a shaft 7 installed in the case 2.

On the other hand, the second idle gear 6 meshes with a final gear 10 supported by a shaft 9 installed on the knob 3 side.

This final gear 10 has a pinion 11 arranged concentrically in a forest shape, and this pinion 11 meshes with a rack 12.

This rack 12 fits into a groove 13 provided in the knob 3, and an indicator needle 14 that protrudes outward from the knob 3 is fixed to this rack 12.

The dial 15 is attached to the case 2 and has a spiral scale 16.
is attached.

FIG. 3 shows an example of the use of the present invention, in which the pressure regulating valve 1γ
It is connected by fitting the square hole 1a of the drive shaft 1 of the pressure adjustment instructing device 19 according to the present invention to the operating shaft 18 of the pressure adjustment indicating device 19 according to the present invention.

At this time, the case 2 is fixed to the body side.

In the above configuration, by turning the knob 3, the operating shaft 18 of the pressure regulating valve 11 is rotated and adjusted.

At this time, the rotation of the knob 3 causes the rack 12 to protrude or retract with respect to the knob 3 via the drive gear 5 and the gear system, and the tip of the indicator needle 14 at this time is attached to the dial 15.
The rotation angle of the knob 3 during each operation, that is, the adjustment angle of the pressure regulating valve is displayed.

[Brief explanation of the drawing]

1 to 3 show embodiments of the present invention.
The figure is a plan view, Figure 2 is a sectional view taken along the line ■-■ in Figure 1,
FIG. 3 is a usage state diagram. FIGS. 4 and 5 show a conventional example, with FIG. 4 being a front view and FIG. 5 being a plan view showing a letter embossing portion. 1 is a drive shaft, 2 is a case, 3 is a knob, 5 is a drive gear, 11 is a pinion, 12 is a rack, 14 is an indicator, 15 is a dial, 16 is a scale, 17 is a pressure regulating valve, 18 is an operating shaft .

Claims (1)

[Claims] 1 A rack 12 in which a drive gear 5 and a knob 3 are fixed to a drive shaft 1 supported by a case 2 and connected to an operating shaft 18 of a pressure regulating valve 17 at one end, and an indicator needle 14 is provided at the tip of the knob 3. is slidably fitted in the direction perpendicular to the axis, and the rack 12 is supported on the knob 3 side.
1 to the drive gear 5, and the indicator needle 1
4 is provided on the case 2, and a spiral scale 16 is provided on the dial 15 along the locus of the tip of the indicator needle 14 drawn by rotation of the knob 3. Pressure setting indicating device.