JPS60211178A - Cock with key - Google Patents

Abstract

PURPOSE:To easily and reliably grasp whether a cock is closed or not by pulling out a key opening and closing the cock only when the cock is located at a complete close position. CONSTITUTION:A plug body 2 is provided with a conduction hole 5 which is connected and disconnected to and from inlet and outlet 4, 4 of a cock body, and the head portion thereof is provided with engaging holes 6 where the forward fingers 11 of a key 10 are fitted and engaged. Projections 13 fitted in engaging grooves 12, 12 of the key 10 to be engaged with the key 10 are disposed on the upper surface of the cock body. Only when the plug body 2 is located at a fully- close position, the key 10 is inserted through a slit 16, and the forward fingers 11 thereof are fitted in the engaging holes 6 and engaged therewith. On turning the key 10 from the fully-closed state in the fully opening direction, the engaging grooves 12 of the key 10 are fitted to the projections 13, so that the key 10 will not be pulled out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cock with a lock, which is mainly used in piping for gas or oil, and which makes it possible to easily and reliably determine whether or not the cock in the piping is in a closed state. It is related to.

Most of the conventional cocks used for the above purposes are of the type that opens and closes the stopper with a handle, and the management of the handle is generally left to the user, but since the handle can be easily operated by anyone other than the user, there are many cocks. In piping that uses pipes, it is difficult to check whether all cocks are in the specified condition, and this can lead to unexpected accidents. In particular, accidents caused by cocks being open when they should be closed have become major accidents.

An object of the present invention is to provide a cock that can easily and reliably determine whether or not the cock in a pipe is in a closed state.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show a cock, Figure 3 shows a key, and Figure 4 shows a cock with a key attached.

Figure 1 is a plan view of the cock, and Figure 2 is a sectional view taken along the line A-A in Figure 1.This cock is a general cock with the handle fixed to the body removed from the body. The cock body 1 has a cylindrical shape, and is provided at its center with a stopper 2 formed in the same taper and passing through a downwardly tapered taper hole 3 in the axial direction and fitting into the taper hole 3. The plug body 2 has a through hole 5 that penetrates in a direction perpendicular to the axial direction and communicates with or does not communicate with the entrance and exit holes 4, 4 of the cock body, and a tip claw 11 of a key 10, which will be described later, is fitted into the head part. Equipped with an engagement hole 6 for engagement,
A port 7 integral with the plug body extends from the tail portion, and is tightened with a nut 8 via a spring washer 9 outside the main body to bring the plug body 2 into close contact with the taper hole surface.

The top surface of the cock body has an engagement groove 12.12 for a key 10, which will be described later.
An annular lid body 15 having a protrusion 13 on the outer edge of the center hole 13 which fits into the key 10 and engages with the key 10 is fixed to the cock body by brazing or screwing.

Furthermore, when the conduction hole 5 of the plug body 2 is in the fully open position perpendicular to the entrance/exit hole 4 of the cock body (the state shown in FIG. A slit 16 is provided to sandwich the center hole 14 and pass through the lid body of a certain length in the axial direction.

61!10 is made of a thin steel plate with a thickness that allows it to be inserted into the slit 16 described above, the inside W of the insertion part 17 is selected so that it can be inserted to the length of the slit, and the protrusion 13 of the center hole 14 of the lid body is located in the middle of the insertion part.
An engagement groove 1 that fits into the key 10 and engages the annular lid 15.
2 and 12, and a claw 11 that fits into the engagement hole 6 of the plug body is provided at the tip. And the claw 11 and the retaining groove 12
The position relative to the retaining groove 1 is when the pawl 11 is inserted into the engaging hole.
2 is set at a position where it fits into and engages with the protrusion 13. I8
is the handle on which you hang your fingers.

Next, its effect will be explained.

Only when the stopper 2 is in the fully open position described above, the key 1O is inserted through the slit 16, the claw 11 at the tip fits into the engagement hole 6, and the engagement groove 12 has a groove that can fit into the protrusion 13. The state shown in Figure 4 is reached. When the key 10 is turned from this fully open state in the fully open direction as shown by the arrow in FIG.
The plug body 2, which is engaged with the engagement hole 6 with the claw 11, is rotated according to the key 10 using the protrusion 13 as a guide. In a position where the plug body 2 and the key 10 have rotated even slightly from the fully open position, even if an attempt is made to remove the key 10 from the plug body 2, the engagement groove 12 of the key 10 is fitted into the protrusion 13 and cannot be removed. That is, when the stopper is in a position other than fully closed (open position), the key 10 remains attached to the stopcock and cannot be removed. Next, when the key 10 is returned to the fully open position according to the arrows in FIG. 1, the stopper 2 is also fully closed, and the key 10 can be inserted and removed through the slit 16.

That is, the key 10 can be removed only when the stopper is fully open; in other words, when the key 10 is not attached to the cock, it can be determined that the stopper 2 is fully closed. It is. Furthermore, the relative position of the bolt 7 and nut 8 of the stopper 2 when the stopper 2 is rotated with the key 10 is the position when the stopper 2 is tightened to the extent that gas leakage is sufficiently prevented and it can be opened and closed easily with the key. . A spring washer or split pin is used to maintain this relationship.

Furthermore, even if an attempt was made to illegally or mischievously rotate the stopper with the cock unlocked in the fully open state using a screwdriver or a mirror piece, it was still difficult to get the tip of the cock to reach the engagement hole 6 through the small center hole 14. Even so, an ordinary person would be unable to rotate the stopper because the protrusion 13 would get in the way and would not be able to use sufficient force.

In the embodiment shown in FIG.
2, and the rotor 23 in the cylinder lock 20
The protrusion 24 is engaged with the engagement hole 6' in the center of the plug body 2, and the rotor 23 is rotated using the key 25 to open and close the plug body 2. The key 25 can only be removed from the cylinder lock 20 when the stopper 2 is in the fully closed position.

In the embodiment shown in FIGS. 6 and 7, the key 26 has an operating knob portion 28 at one end of the horizontal rod 27 in the lateral direction, and a diagonal locking portion 29 at the other end. In the closed position, the key 26 is inserted through the attachment/detachment notch 15a' provided in the radial direction of the lid body 15', and the square locking part 29 is inserted into the plug body 2'.
The key 26, which is inserted into the angular recess 6'' and located below the lid 15', is rotated through a circumferential notch a' provided at the upper end of the cock body 1'. The stopper body 2' is rotated 90 degrees to open the cock.The key 26 cannot be removed when the cock is in the open position, and the key 26 can only be removed when the cock is completely closed in the position shown in FIG. It becomes possible to extract it.

Since the keyed cock of the present invention has the above-described structure, it produces the following effects.

1. The safety manager who manages the use of a large number of combustion appliances in the piping can collect and manage the keys in one place by attaching joint numbers and codes to the keys and cocks. The corresponding cock is closed.

The faucet corresponding to the mouth, lock not assembled, is in use or closed or do not remove the key.

This can be determined easily and reliably, and necessary measures can be taken promptly.

C. In order to investigate the cause of an accident, not only the manager but also a third party can concretely prove the open/closed state of the cock at the time.

2. A closed cock cannot be opened with anything other than a key, which prevents illegal activity, mischief, and even suicide, and each time it is closed, it has the effect of being sealed until it is ready for reuse.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a cock according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a front view of the key, FIG. 4 is a sectional view of the cock with the key attached, and FIG. 5 is a side view of another embodiment. FIG. 6 is a plan view of still another embodiment, and FIG. 7 is a sectional view taken along line 113-B in FIG. 6. 1...cock body, 2...stopper body, 3.
...Tapered hole, 4...Cock entrance and exit hole,
5... Conductive hole, 6... Engagement hole, 7...
...Bolt, 8...Nando, 9...
・Spring washer, 10...Key, 11...
...Claw, 12...Engagement groove, 13...
・Inner edge projection, 15... Lid body, 16...
Slit, 20...Cylinder lock, 21...
...Case, 23...Rotor, 25...
·key. Patent Applicant Wu Yi Tai Part 0 25 Figure 6 15° 150゛

Claims (1)

[Claims] A cock with a lock, characterized in that the cock can be opened and closed using a key, and the key can be removed only when the cock is in a fully closed position.