JP3430310B2 - Valve operating device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve in which a lever with a roller is rotatably supported on the outside of a main body and a valve operator protruding outside the main body is pushed by the lever with the roller to switch between opening and closing of a valve mechanism. Operation device.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional operating device for a mechanical valve. In a conventional operating device, a pin receiver 2 is provided on the outer surface (upper surface in the figure) of a valve body 1, and a base end portion of a lever 4 with a roller that axially supports a roller 3 is pivotally supported on the pin receiver 2 by a hinge pin 5. By doing so, the lever 4 with rollers can be rotated up and down with respect to the valve body 1, and the valve operator 6 protruding to the outer surface of the valve body 1 is provided with rollers against the spring in the valve body 1. The structure is such that the valve mechanism in the valve body 1 is opened / closed by pushing with the lever.

[0003]

However, in such a pivotal structure using hinge pins, when the number of operations of the lever with roller 4 increases, the hinge pin 5 and the pin receiver 2 side are worn and play occurs, and the roller 3 is kept in a predetermined position. There is a problem that the lever 4 with the roller does not rotate to a predetermined angle even when the stroke is pushed and the valve mechanism cannot be opened / closed.

An object of the present invention is to eliminate the frictional force associated with the rotation of the lever with roller, thereby reducing the occurrence of malfunction of the lever with roller and improving the durability.

[0005]

SUMMARY OF THE INVENTION In a valve operating device according to the present invention, a base end portion of a lever with a roller is fixed to a main body via a leaf spring whose middle portion is curved and protrudes upward, and the elasticity of the leaf spring is fixed. The lever with roller is rotatably supported by, and a pressing plate having a fixed part and a stopper part having an inverted L shape is attached to the outside of the main body. The pressing plate covers the plate spring, and the stopper part It is characterized in that the lever with a roller is restricted from rotating more than a predetermined angle.

If the pressing plate and the plate spring are fixed to a mounting base mounted on the main body, it can be applied to a ready-made valve without modification.

When the mounting base is used, the base end portion of the leaf spring can be fixed by being sandwiched between the pressing plate and the mounting base.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a valve operating device according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a side view. FIG. 1 schematically shows an example of a valve mechanism V provided in a valve housing that is integral with or separate from the main body 10 together with the operating device according to the present invention. 11 is the main body 1
This valve operator 11 protrudes from one surface of 0 (the upper surface in the figure).
Any structure may be used as long as it is pressed from outside to switch between open and closed.

A mounting base 12 is attached to the outer surface of one side of the main body 10 by a screw 13 to form a part of the main body 10, and a pressing plate 14 is fixed to one side surface of the mounting base 12 by the screw 13. At the same time, the pressing plate 14 and the mounting base 12 sandwich and fix the base end portion 15a of the leaf spring 15.

The pressing plate 14 has a vertical fixing portion 14a for fixing it to the mounting base 12, and a stopper portion 14 which extends straight horizontally from the upper end thereof and only the tip portion thereof is curved slightly upward.
b and b are integrally formed in an inverted L shape. For this reason, the leaf spring 15 has a form in which the entire length is covered with the pressing plate 14. There is a required gap between the stopper portion 14b of the pressing plate 14 and the upper surface of the mounting base 12 and the upper surface of the main body 10.

The leaf spring 15 is an alternative to the conventional hinge pin, and the base end portion of the roller-equipped lever 16 is fixed to the tip end portion of the leaf spring 15. The roller-equipped lever 16 utilizes the elasticity of the leaf spring 15 to form the main body 10. It has a form pivotally supported with respect to.

The intermediate portion 15b of the leaf spring 15 has a shape protruding upward in an arcuate shape in order to increase elasticity and strength, and a part thereof is pressed down.
It contacts the lower surface of the stopper portion 14b. A roller 17 is pivotally supported at the tip of the lever 16 with roller.

Normally, the valve operator 11 is pushed up by the spring force in the main body 10, and the leaf spring 15 also has a restoring force, so that the lever 16 with roller is pressed as shown by the solid line in FIG. The state of being pushed up to the position where it abuts the stopper portion 14b of the plate 14 is maintained. When a pressing force is applied to the roller 17 in this state, the lever 16 with a roller rotates downward to push down the valve operator 11, as shown by a chain line, so that the valve mechanism V is switched between open and closed. In order to secure a large downward rotation angle of the lever with roller 16, the recess 10 is formed on the upper surface of the main body 10.
a is formed.

Since the lever 16 with the roller is rotated up and down by utilizing the elasticity of the leaf spring 15, there is no place to rub and the durability is high.

In the above embodiment, the pressing plate 14 and the leaf spring 15 are attached to the main body 10 by using the mounting base 12, but they may be directly mounted without using the mounting base 12.

[0017]

According to the present invention, the base end portion of the lever with roller is fixed to the main body through the leaf spring, and the elasticity of the leaf spring pivotally supports the lever with roller. Unlike the hinge pin, there is no friction associated with the rotation of the lever with roller, so that the occurrence of malfunction of the lever with roller can be reduced and the durability can be improved.

Further, a pressing plate is attached to the outside of the main body,
The pressing plate regulates the rotation of the lever with the roller beyond a predetermined angle and covers the plate spring, so that the pressing plate serving as a stopper of the lever with the roller can protect the plate spring.

Since the middle portion of the leaf spring is curved and projected upward, the elasticity is high and the strength is also strong, and the leaf spring can be pressed by the stopper portion of the pressing plate.

According to the second aspect of the present invention, since the pressing plate and the leaf spring are fixed to the attachment base attached to the main body, it can be applied to an existing mechanical valve without modification.

According to the third aspect of the invention, the base end portion of the leaf spring is fixed by being sandwiched between the pressing plate and the mounting base, which facilitates assembly.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the same example.

FIG. 3 is a side view.

FIG. 4 is a partially cutaway side view of a conventional example.

[Explanation of symbols]

V valve mechanism 10 body 11 Valve operator 12 mounting base 13 screws 14 Press plate 14a Fixed part 14b Stopper part 15 leaf spring 15a base end 15b middle part 16 Lever with roller 17 Laura

Claims (3)

(57) [Claims] 1. A valve operating device for rotatably pivoting a lever with a roller on the outside of a main body, and pressing a valve operator protruding outside the main body with the lever with the roller to switch between opening and closing of a valve mechanism. The base end of the lever with roller is fixed to the main body via a leaf spring whose middle portion is curved and protrudes upward, and the lever of the roller is pivotally supported by the elasticity of the leaf spring. In addition, a holding plate in which the fixed portion and the stopper portion have an inverted L shape is attached, the leaf spring is covered with the holding plate, and the stopper portion restricts the rotation of the lever with roller beyond a predetermined angle. A valve operating device characterized by. 2. The valve operating device according to claim 1, wherein the pressing plate and the plate spring are fixed to a mounting base mounted on the main body. 3. The valve operating device according to claim 2, wherein the base end portion of the leaf spring is fixed by being sandwiched between a pressing plate and a mounting base.