JP5094629B2 - Stopcock - Google Patents

Description

  The present invention relates to a water stop cock having a water theft prevention function installed near a water meter or the like.

  This kind of stop cock is structured so that a special handle for opening and closing the tap water passage can be freely attached to and detached from the main body of the tap water. However, a general user is prevented from performing an opening / closing operation without permission.

  For example, the water stop cock for preventing theft of Patent Document 1 is provided with a slit on the upper surface of a stem (plug bar) that engages a stopper (ball-shaped valve) and a lower end, and above a nut that is screwed to the stopper body. A groove is provided at the edge to allow communication with the slit, a key that can be engaged with the slit is provided at the lower end of the handle shaft, and the handle shaft is configured to be detachable from the nut via the key cover. .

  In the above-described conventional water stopcock, the opening / closing position of the plug body can be visually recognized from the outside by the slit direction of the stem even after the handle shaft is pulled out, so that the next switching operation can be performed accurately. However, since the slit is looked into from the groove of the nut, it is not always easy to check the slit direction at the installation site. In addition, when the groove is provided in the cross direction, the handle shaft key can be opened even if the slit is assembled as a plug if it is in the tube axis direction, and if the slit is in the direction perpendicular to the tube axis. There is a possibility that the open / closed state may be mistaken for engaging with the concave groove in the direction.

  Another conventional water stop cock is shown in FIG. The stop cock v has a stopper body b with a ball-shaped valve c and a rotation restricting pin e that connects the tip of the ball-shaped valve c and protrudes in a direction perpendicular to the axis as a part of the stopper body. The stopper rod d provided so as to be able to rotate within an angle range of 90 degrees by contact, the guide hole h fixed to the stopper body b and facing the head f of the stopper rod d, and the center of the guide hole A cap member g having a guide pin i protruding in a direction perpendicular to the guide pin, an inverted U-shaped engagement groove m that can be engaged with the guide pin i, and a recess n that can be fitted to the head f of the stopper rod d. The lever-type handle k is formed. Note that the engagement groove m of the handle k is provided at an angle of 90 degrees with the angular interval between one vertical groove and the other vertical groove centered on the shaft center in accordance with the rotation angle of the plug rod d.

When the ball valve is in a state where the passage is opened, as shown by a solid line in FIG. 7, the handle can be attached to the plug body with the lever portion passing in the same direction as the water passing direction. When the handle is mounted, the engaging groove of the handle is engaged with the guide pin, and the concave portion of the handle is fitted to the head of the plug bar. When the handle in the solid line position is rotated 90 degrees, the ball valve closes the passage and the handle can be removed.
When the passage is closed or opened, the rotation restricting pin of the plug bar is brought into contact with a part of the plug body. Moreover, although the straight groove | channel for displaying a water flow direction is provided in the upper surface of a plug stick, dust etc. may block a groove | channel and it may be difficult to confirm a display.

Even when the passage is closed by the ball valve and the rotation restricting pin is in contact with a part of the plug body, the handle can be attached to the plug body with the lever passing in the same direction as the water flow direction. Therefore, if the passage is open, it may be accidentally mistaken that the handle is attached and the closing operation is further performed. At this time, since the rotation restricting pin is pressed against a part of the plug main body by a large external force different from the normal time, there is a possibility that the rotation restricting pin is damaged.
Actual Kaihei 4-95182

  An object of the present invention is to provide a water stop cock that can prevent damage to a plug bar or the like due to an erroneous operation of a handle.

In order to achieve the above object, the invention described in claim 1 includes a stopper body having a ball-shaped valve that opens and closes a water passage, and a rotation restriction that connects the tip of the ball-shaped valve and projects radially. A plug bar which is provided so as to be rotatable only within a predetermined angle range by abutting the projection for contact with a part of the plug body, a guide hole which is fixed to the plug body and faces the head of the plug bar, and A cylindrical member having a guide pin protruding in the radial direction of the guide hole, an engagement groove that can be engaged with the guide pin, and a shaft portion in which a recess that can be fitted to the head of the plug bar is formed. In a stop cock consisting of a lever-shaped handle,
Protrusions are provided on the side edges of the head of the plug bar at the same angular intervals as the rotation angle of the plug bar, and one of the protrusions of the plug bar is aligned with the position of the guide pin in the open state of the passage. The handle can be attached and detached, and in the closed state of the passage, the other protrusion of the plug bar is made to match the position of the guide pin so that the handle can be attached and detached. When mounted in the open position, the end surface of the shaft portion of the handle is in contact with one protrusion of the plug rod so that the recess does not fit into the head of the plug rod. And

  In order to achieve the same object, the invention described in claim 2 is the water stopcock according to claim 1, wherein the head of the plug bar is a serration shaft, and the recess of the handle corresponds to the serration shaft. A groove is provided.

  In order to achieve the same object, the invention described in claim 3 is characterized in that, in the stop cock described in claim 1 or 2, the rotation angle of the plug bar is 90 degrees. is there.

  This stop cock is designed so that the handle shaft cannot be attached to one of the protrusions of the stopper rod when the handle is attached in the open position when the passage is closed. Therefore, it is possible to reliably eliminate problems such as damage to the rotation restricting protrusion due to an erroneous operation of the handle seen in a conventional water stop cock.

  The best mode of the present invention will be described below with reference to the drawings. 1 is a partially longitudinal side view of a water faucet according to the present invention, FIG. 2 is an explanatory view showing the positional relationship between a stopper rod and a guide pin, FIG. 3 is a cross-sectional view taken along the line AA in FIG. It is a perspective view of a stick.

  In FIG. 1, a stop cock 1 according to the present invention opens and closes a water passage in a plug body 2 in which a male screw 3 is formed on the inflow side of tap water or the like and a female screw 4 is formed on the outlet side. A known ball valve 10 is provided. The ball-shaped valve 10 is watertightly held by plastic packings 11 and 12. The packing 12 on the outlet side is attached to an inner end portion 13a of a pipe joint 13 screwed to the female screw 4.

  A shaft hole 6 is provided in the rising portion 5 of the plug body 2 in a direction orthogonal to the water flow direction x. The shaft hole 6 is loosely fitted with a stopper rod 15 having a rotation restricting pin 20 as a rotation restricting protrusion protruding in the radial direction while connecting the tip portion 15a to the ball valve 10. As shown in FIG. 3, the stopper rod 15 has a predetermined angle range, in this embodiment example, by bringing a rotation restricting pin 20 into contact with the wall surfaces 7a and 7b of the notch 7 which is a part of the stopper body 2. It is provided so as to be rotatable by 90 degrees. The head of the stopper rod 15 is a serration shaft 16, and projections 17a and 17b are provided on the side edge of the head, that is, the serration shaft 16, at the same angular interval as the rotation angle (90 degrees) of the stopper rod. Yes. The other protrusion 17b of the plug bar 15 is provided so as to match the position of the rotation restricting pin 20 when viewed from the axial direction in the open state of the passage. Reference numeral 18 denotes a linear groove provided on the upper surface of the stopper rod 15 for displaying the direction of water flow. Denoted at 22 are O-rings respectively mounted in two rows of annular grooves 19 formed in the stopper rod 15.

  Reference numeral 25 denotes a cylindrical member fixed to the outside of the rising portion 5 of the plug body 2. The cylindrical member 25 is provided with a guide hole 26 that faces the serration shaft 16 and a guide pin 27 that protrudes in the radial direction of the guide hole 26. As shown in FIG. 2 (a), one protrusion 17a of the stopper rod 15 is provided so as to match the position of the guide pin 27 when viewed from the axial direction in the open state of the passage.

The handle 30 for opening and closing the stop cock 1 according to the present invention has the same structure as the conventional handle described above, but will be described again because it is related to the present invention.
As shown in FIGS. 5 and 7, the lever-shaped handle 30 includes a shaft portion 31 for insertion into the guide hole 26 of the cylindrical member 25. The shaft portion 31 is formed with an inverted U-shaped engagement groove 32 that can be engaged with the guide pin 27 of the tubular member 25 and a serration groove 33 that can be fitted with the serration shaft 16 of the plug rod 15 in the recess 31b. is doing. The engaging groove 32 is provided at an angular interval of 90 degrees in accordance with the rotation angle of the plug rod 15 between the one vertical groove 32a centered on the axis and the other vertical groove 32c. The depth of the vertical groove 32c is formed so as to communicate with the horizontal groove 32b.

  Thus, in the open state of the passage, the one protrusion 17a of the plug bar 15 is made to match the position of the guide pin 27 so that the handle 30 can be attached and detached. When the protrusion 17b matches the position of the guide pin 27, the handle 30 can be attached and detached, and when the handle 30 is mounted in the open position in the closed state (the lever 30a is in the same direction as the water flow direction). The stop cock 1 according to the present invention is configured such that the end surface 31a of the shaft 31 of the handle abuts against one protrusion 17a of the plug rod 15 so that the serration groove 33 does not fit into the serration shaft 16. .

Next, the operation and use method of the water tap 1 according to the present invention will be described.
(1) In the open state of the passage shown in FIG. 2 (a), one vertical groove 32a of the handle 30 is inserted in alignment with the guide pin 27 (and one protrusion 17a). At this time, the other vertical groove 32c of the handle 30 is engaged with the other protrusion 17b of the plug rod 15, and the serration groove 33 of the handle 30 is fitted to the serration shaft 16 of the plug rod 15. The lever part 30a is attached to the water stop cock 1 in the same direction as the water passing direction. The rotation restricting pin 20 of the stopper rod 15 is in contact with the wall surface 7 a of the stopper body 2.
(2) In (1), when the handle 30 is rotated clockwise, the rotation restricting pin 20 comes into contact with the wall surface 7b of the plug body 2 and the handle 30 stops, and the passage shown in FIG. It becomes a state. At this time, the lever portion 30a of the handle 30 rotates 90 degrees and is in a direction orthogonal to the water flow direction. Therefore, when the handle 30 is lifted, the fitting between the serration groove 33 and the serration shaft 16 is released, so that the handle 30 can be removed from the stop cock 1.
(3) In (2), one vertical groove 32a of the handle 30 is inserted into one projection 17a of the stopper rod 15, and the other vertical groove 32c is inserted into the guide pin 27 (and the other projection 17b). When the handle 30 is rotated counterclockwise, the rotation restricting pin 20 comes into contact with the wall surface 7a of the plug body 2 and the handle 30 is stopped, and the passage is switched to the open state shown in FIG.
The operations (1) to (3) are normal opening / closing operations of the stop cock 1.

  In (2), if one of the longitudinal grooves 32a of the handle 30 is misaligned with the guide pin 27 (and the one protrusion 17a) in order to misunderstand that the passage is open and close the passage, the handle The handle 30 cannot be mounted because the end surface 31 a of the shaft portion 31 of the 30 abuts against one protrusion 17 a of the plug rod 15. Therefore, it is possible to prevent the rotation restricting pin 20 of the plug rod 15 from being damaged as a result.

1 is a partially longitudinal side view of a water stop cock according to the present invention. Explanatory drawing showing the positional relationship between the stopper rod and the guide pin AA line sectional view in FIG. Perspective view of the stopper rod Illustration of handle shaft Explanatory drawing of conventional water stop cock Top view of a stop cock with a handle

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Water stop cock 2 ... Plug body 10 ... Ball-shaped valve 15 ... Plug bar 16 ... Serration shaft (head part of a plug bar)
17a ... one protrusion 17b ... the other protrusion 20 ... rotation restricting pin (rotation restricting protrusion)
25 ... cylindrical member 26 ... guide hole 27 ... guide pin 30 ... handle 31 ... shaft 32 ... engagement groove 33 ... serration groove

Claims (3)

By connecting a tip body with a ball-shaped valve that opens and closes a water passage, and connecting a tip to the ball-shaped valve and causing a rotation restricting projection to project in a radial direction to a part of the plug body A tubular member provided with a stopper rod that is rotatably provided within a predetermined angle range, a guide hole that is fixed to the stopper body and faces the head of the stopper rod, and a guide pin that projects in the radial direction of the guide hole And a lever-type handle having a shaft portion formed with an engagement groove that can be engaged with the guide pin and a concave portion that can be fitted to the head of the plug rod.
Protrusions are provided on the side edges of the head of the plug bar at the same angular intervals as the rotation angle of the plug bar, and one of the protrusions of the plug bar is aligned with the position of the guide pin in the open state of the passage. The handle can be attached and detached, and in the closed state of the passage, the other protrusion of the plug bar is made to match the position of the guide pin so that the handle can be attached and detached. When mounted in the open position, the end surface of the shaft portion of the handle is in contact with one protrusion of the plug rod so that the recess does not fit into the head of the plug rod. A stop cock.   The water stop cock according to claim 1, wherein a groove corresponding to the serration shaft is provided in a concave portion of the handle, with the head portion of the plug rod as a serration shaft.   The stopcock according to claim 1 or 2, wherein a rotation angle of the plug bar is 90 degrees.

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