JPS6124604Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cap provided for controlling the opening and closing of a valve such as a vertical gate valve used as a so-called water control valve for water supply, for example.

2. Description of the Related Art Conventionally, vertical water gate valves installed in manholes such as roads have been provided with caps facing upward to open and close the valves. To open and close the valve, the cap is removably fitted into a fitting hole formed at the end of the operating handle, and the operating handle is rotated about the axis of the cap from the ground. In the prior art, the cap is prismatic with a square cross section perpendicular to its axis. The inside of the manhole is already dark during the day, and especially at night, it is necessary to approximate the fitting hole of the operating handle, align the axes of the cap and the fitting hole, and align the positions in the circumferential direction. It is necessary to fit the cap accurately. Therefore, the operation for fitting the cap and the operating handle is time consuming and troublesome.

An object of the present invention is to provide a valve cap that allows easy fitting between the cap and the fitting hole of the operating handle.

FIG. 1 is a simplified front view of one embodiment of the present invention. For example, a valve box 2 of a vertical gate valve 1 serving as a water control valve for water supply has a flow path 3 through which a water supply flows. By rotating an operating shaft 4 extending vertically from the valve box 2 about its axis, the valve body can be raised and lowered to control opening and closing of the flow path 3. A cap 5 is fixed to the upper end of the operating shaft 4. The operation handle 6 has a T-shaped overall shape,
It has an operation part 7 extending in the horizontal direction and a shaft part 8, and a fitting end part 9 is provided at the lower end of the shaft part 8. The cap 5 is fitted into the fitting hole 10 formed in the fitting end 9 so that the shaft part 8 and the operating shaft 4 are on the same axis, and the operating shaft part 7 is rotated around the axis of the operating shaft 4. By rotating, the gate valve 1 can be opened and closed. Such a gate valve 1 is provided, for example, in a manhole.

Fig. 2 is a partially cutaway sectional view of the cap 5 seen from the front, Fig. 3 is a plan view of the cap 5, and Fig. 4 is a sectional view taken from the cutting plane line - in Fig. 2. It is. The cap 5 is cast from ductile cast iron or the like. This cap 5 is attached to the mounting part 1
1, and a tapered fitting protrusion 12 concentric with the mounting portion 11. The mounting portion 11 has a substantially right cylindrical shape, and a mounting hole 14 having a bottom 13 opening downward is formed therein. The mounting hole 14 is the mounting part 11
is concentric with The attachment hole 14 has a square cross section perpendicular to the axis. As shown in FIG. 5, a square columnar mounting end 15 of the operating shaft 4 is fitted into the mounting hole 14. As shown in FIG. The mounting portion 11 is provided with a screw hole 17 into which a screw 16 is screwed. This screw hole 17 is connected to the mounting part 1
1 and an axis extending from the diagonal of the mounting hole 14. A recess 18 is carved in the corner of the mounting end 15 of the operation shaft 4 using a grinder or file, and the mounting end of the recess 18 is cut in such a way that the end of the screw 16 is locked in this recess 18. The longitudinal position in section 15 is determined. By locking the screw 16 into the recess 18 and fixing the operating shaft 4 and the cap 5, the cap 5 is prevented from separating upward from the operating shaft 4. The recess 18 can be easily formed using a grinder, a file, etc., as described above, which is advantageous from the viewpoint of manufacturing operations.

The fitting protrusion 12 includes a rectangular prism body 20 having a square cross section perpendicular to the axis, and a pyramid body 21 connected to the prism body 20 . The axis-perpendicular cross section of the pyramid 21 is also square. The prismatic body 20 has four planes 20
It has a to 20d. The pyramid 21 has an arcuate surface 21 smoothly connected to these planes 20a to 20d.
a to 21d, and a flat top 22 perpendicular to the axis of the pyramid 21. The arcuate surfaces 21a to 21d are
The planes 20a to 20 of the prismatic body 20 have the same shape.
d is continuous in the tangential direction.

When fitting the fitting hole 10 of the operating handle 6 into the cap 5 fixed to the operating shaft 4, the fitting hole 1
0 is brought into contact with the cap 5, and when the positions of the cap 5 and the fitting hole 10 in the circumferential direction are misaligned,
As shown by the imaginary line in FIG. 3, the edge 10a of the fitting hole 10 contacts the ridgeline 23 of the pyramid 21. In this state, if the shaft portion 8 of the operating handle 6 is angularly displaced around its axis, the fitting hole 10 will fit into the prismatic body 20 as shown by the imaginary line in FIG. and the operation handle 6 are connected. The pyramid 21 has an outwardly bulging arcuate surface 21
a to 21d, and the ridge line 23 thereof is curved to protrude outward, so that the operating handle 6
It becomes possible to guide the edge 10a of the fitting hole 10 to the smooth prismatic body 20. Furthermore, even when the shaft portion 8 of the operating handle 6 and the axis of the fitting hole 10 do not coincide with each other and are inclined, it is easy to fit the cap 5 into the fitting hole 10 by groping. The prismatic body 20 is formed to be slightly tapered toward the pyramid 21 side, thereby making the fitting hole 1
The end edge 10a of the prismatic body 20 can be tightly fitted in the middle of the prismatic body 20 in the vertical direction as shown in the second figure.

FIG. 6 shows a cap 25 of another embodiment of the present invention, and corresponding parts of the previous embodiments are given the same reference numerals and will not be described further. What should be noted is that a flange 26 is formed between the attachment portion 11 of the cap 25 and the tapered fitting protrusion 12.
A cap 26 having such a flange 26
indicates that the gate valve to which the cap 25 is fixed opens counterclockwise; on the other hand, the cap 5 that does not have a flange 26 as shown in FIGS. This indicates that the provided gate valve 1 opens clockwise.

This invention is applicable not only to vertical gate valves for water supply, but also to
A wide variety of implementations are also possible in connection with other valves.

As described above, according to the present invention, the cap includes a prismatic body and a tapered cone connected to the prismatic body. , since the axes of the fitting hole and the prismatic body and the positions in the circumferential direction around the axis do not exactly match, the edge of the fitting hole is guided by the ridgeline of the pyramid and guided to the prismatic body. It becomes possible to easily fit and connect the cap and the fitting hole of the operating handle, and the connection work is easy even in an environment such as darkness.

[Brief explanation of the drawing]

1 is an overall front view of an embodiment of the present invention, FIG. 2 is a partially cutaway sectional view of the cap 5 seen from the front, FIG. 3 is a plan view of the cap 5, and FIG.
5 is a perspective view showing the mounting part 15 on the upper part of the operating shaft 4 and the screw 16 for fixing the cap 5 to the mounting part 15. FIG. Cap 25 of another embodiment of the present invention
Fig. 7 is a partially cutaway sectional view seen from the front.
8 is a plan view of the cap 25 shown in the figure, and FIG. 8 is a sectional view taken along the section line - in FIG. 6. 1... Gate valve, 4... Operating shaft, 5, 25... Cap, 6... Operating handle, 7... Operating unit, 8
... Axis line, 9 ... Fitting end, 10 ... Fitting hole, 1
DESCRIPTION OF SYMBOLS 1... Mounting part, 14... Mounting hole, 15... Mounting part, 16... Screw, 17... Screw hole, 18... Recess, 20... Prismatic body, 21... Pyramid body, 26...
flange.

Claims (1)

[Claims for Utility Model Registration] (1) A valve cap is removably fitted into a fitting hole formed at the end of an operating handle, and the valve is opened and closed by rotating the cap around its axis. 1. A valve cap, wherein the fitting protrusion fitted into the fitting hole of the cap is comprised of a prismatic body and a tapered pyramid connected to the prismatic body. (2) A prismatic body has a square cross section perpendicular to its axis;
2. The valve cap according to claim 1, wherein the pyramid is a four-sided pyramid consisting of an outwardly bulging arcuate surface and smoothly connected to the prism.