JPS5813047Y2 - Valve arm retaining device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a valve arm removal prevention device that has a simple structure and is easy to disassemble and assemble.

Conventionally, in order to stably hold the valve arm fitted on the valve arm shaft,
For example, as shown in FIG. 1, the valve arms 2 a and 2 b are placed on the left and right sides of the support base 1, and the valve arm shaft 3 is placed between the two valve arms 2 a. , 2b and the groove 3a provided in the valve arm shaft 3 after being inserted through the support base 1;
Circlips 5a and 5b are connected to 3b via washers 4a and 4b.
This was usually done by mating.

However, with the structure of a dowel stopper, it is necessary to provide a groove on the valve arm shaft, which increases the number of machining steps, and when fitting the circlip, not only does it require special tools,
There was a drawback that assembly and disassembly were difficult.

The purpose of the present invention is to eliminate these drawbacks and provide an inexpensive pull-out stop device that has a simple structure, does not require special tools, and is easy to assemble and disassemble. A stop spring made of an elongated C-shaped elastic wire having a shape formed therein is fitted into the end of each valve arm shaft, with the loop portion of the stop spring being left in a free state in the middle, and the valve arm and the valve arm support are connected to each other. and detachably attached regardless of the valve arm shaft, and elastically fixed by urging both the left and right valve arms toward the valve arm support base using the spring force of the stop spring. It is characterized by

EMBODIMENT OF THE INVENTION Hereinafter, the concrete structure of this invention is demonstrated based on the Example shown in an accompanying drawing.

Figure 2 shows one embodiment of the pull-out stopper of the present invention, in which a single elastic steel wire as shown in Figure 3 is bent into an elongated C shape, and loops 6 a and 6 b are provided at both ends. The formed stop spring 6 is used to prevent removal.

That is, in FIG. 2, the valve arm shaft 3 is inserted through the valve arms 2 a and 2 b arranged on the left and right with the support base 1 in the middle.
is attached, and loop portions 6a and 6b at both ends of the stop spring 6 are hooked to the respective protruding shaft portions of both valve arms 2a and 2b,
The support stand 19 and both valve arms 2 are in a free state in the middle.
, 2 and the valve arm shaft 3 in a removable manner.

The elongated C-shaped elastic wires have loop portions 6a facing each other.
, 6b are configured to be biased inward, and the thrust force of the valve arm due to the force of the valve arm stopper spring acts uniformly to support the left and right valve arms 2a, 2b of the support base 1, respectively. The bullet is sure to land on the table side.

As described above, according to the present invention, the elastic wire is curved and the spring force is used to fix the valve arm and prevent the valve arm from being pulled out. Therefore, there is no need for a special tool for fitting the circlip, and it is easy to disassemble and assemble by simply opening the stop spring by hand, reducing the number of parts and machining. This has the effect of reducing costs by reducing man-hours, and since each valve arm is pressed against the support base by a spring made of elastic wire, the valve arm is supported reliably, and the stable and uniform thrust prevents the valve arm from being pulled out. This combined with the ease of attaching and removing the retaining spring makes it an extremely useful device.

The device of the present invention can also be used in the case of multiple cylinders and exhibits excellent effectiveness.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a known pull-out stopper;
The figure is a sectional view showing an example of the pull-out stop device according to the present invention, and FIG. 3 is a perspective view of the stop spring in FIG. 2. 1...Support stand, 2a, 2b...
Valve arm, 3... Valve arm shaft, 6.7... Stop spring, 6 a, 6 b... Loop part of stop arm, 8... - Valve arm stop spring.

Claims (1)

[Scope of utility model registration request] In a valve arm support device comprising a valve arm support base and both valve arms disposed on the left and right sides of the support base and a valve arm shaft inserted through the valve arm support base, a slender elongated shaft extending between the left and right valve arms and forming a loop at both ends. A stop spring made of a C-shaped elastic wire is fitted to the end of the valve arm shaft so that the loop portions at both ends are in contact with each valve arm, and the middle part is left in a free state to support the valve arm and the valve arm. It is attached detachably regardless of the stand and the valve arm shaft, and both the left and right valve arms are biased toward the support stand by using the spring force of the stop spring to elastically fasten them. Features a device that prevents the valve arm from being removed.