JP7398220B2 - Water stopcocks and faucets - Google Patents

Description

The present invention relates to a water stop valve and a water faucet equipped with the water stop valve.

Patent Document 1 describes a water stop valve that is used by being attached to a water faucet.
As shown in FIG. 11, the water stop valve 61 is used by being attached to a mounting base 62 of the water faucet 60. Inside the mounting base 62, there are a first flow path 60a connected to a water supply pipe (not shown), a second flow path 60b connected to a valve mechanism (not shown), and a first flow path 60a and a second flow path 60a connected to a water supply pipe (not shown). and an intermediate channel 60c located between the channels 60b. The end of the first flow path 60a facing the intermediate flow path 60c functions as a valve port 60d.

The stopcock 61 is disposed within the intermediate flow path 60c and includes a cylindrical bonnet 70 and a spindle 80 screwed onto the inner periphery of the bonnet 70. A shaft member 82 is inserted through one end of the spindle 80 in the axial direction, and a packing 81 as a valve body is attached to one end of the shaft member 82 . A spring 83 attached to the shaft member 82 biases the packing 81 so that it comes into contact with the periphery of the valve port 60d. A groove 80a serving as an engaging portion for engaging a tool for rotating the spindle 80 is provided at the other end of the spindle 80 in the axial direction. This groove 80a extends in a straight line along the radial direction of the spindle 80, and both longitudinal ends of the groove 80a reach the outer peripheral edge 80b of the spindle 80.

When the spindle 80 is rotated using a tool to move the spindle 80 toward the back in the axial direction of the bonnet 70, one end of the spindle 80 comes into contact with the packing 81 via the shaft member 82. This causes the packing 81 to close the valve port 60d regardless of the water pressure in the first flow path 60a. Since the first flow path 60a and the intermediate flow path 60c are no longer communicated with each other, the faucet 60 becomes water-stopped. Furthermore, when the spindle 80 is moved toward the front in the axial direction of the bonnet 70, the packing 81 becomes movable toward the other end of the spindle 80 due to the water pressure in the first flow path 60a. The valve port 60d is opened by the packing 81 moving toward the other end of the spindle 80, and the first flow path 60a and the intermediate flow path 60c are brought into communication, thereby canceling the water cutoff state.

Japanese Patent Application Publication No. 2002-206262

As shown in FIG. 11, when the spindle 80 is in the most forward position, the near end of the spindle 80 projects further to the near side than the near end of the bonnet 70.

Since the stopcock 61 is attached to a relatively inconspicuous location from the outside of the faucet 60, it may be difficult for an operator to engage a tool in the groove 80a. Furthermore, once the engaged tool is disengaged from the groove 80a, it is necessary to re-engage the tool from the beginning, resulting in poor workability.

The present invention has been made in view of these circumstances, and its purpose is to provide a water stop valve with improved workability when operating the water stop valve, and a water faucet equipped with the water stop valve. be.

A water stop valve for solving the above problem includes a cylindrical bonnet and a spindle screwed onto the inner periphery of the bonnet, and rotates the spindle to provide front and rear sides in the axial direction of the bonnet. The water stop valve is configured to be able to switch water discharge by moving the water stop valve to the side, and the front end of the spindle is engaged with a tool for rotating the spindle. The gist is that when the engaging portion is provided and the spindle is at the most proximal position, the proximal end of the spindle is located further back than the proximal end of the bonnet. .

According to this configuration, even when the spindle is in the most proximal position, the engaging portion is surrounded by the inner periphery of the proximal end of the bonnet. When engaging the tool with the engagement part, the tool comes into contact with the inner periphery of the front end of the bonnet, so you can grasp the approximate position of the engagement part without relying solely on visual inspection, and then insert the tool. can be engaged. Furthermore, even if the tool comes off the engagement portion during operation of the water stop valve, the tool comes into contact with the inner periphery of the front end of the bonnet and stops, making it easy to engage the tool again. These can improve workability when operating the water stop valve.

Regarding the water stopcock, it is preferable that the engaging portion is provided inside an outer peripheral edge of the near end of the spindle. In an embodiment in which the engaging portion reaches the outer peripheral edge of the near end of the spindle, there is a risk that the tool may easily come off from the outer peripheral edge of the engaging portion. According to this configuration, the engaging part is provided inside the outer periphery of the near end of the spindle, and since the engaging part does not reach the outer periphery of the end, the tool can be removed from the engaging part. It can be made difficult to come off. Therefore, the workability when operating the water stop valve can be further improved.

Regarding the water stopcock, it is preferable that the engaging portion is a groove provided at the near end of the spindle. According to this configuration, by engaging the tool inside the groove, it is possible to make it difficult for the tool to come off. Furthermore, it becomes easy to provide the engaging portion at the near end of the spindle.

Regarding the water stop valve, the inner periphery of the front end of the bonnet is provided with a taper that slopes radially inward toward the back, and when the spindle is at the most front position, Preferably, the near end of the spindle is located at the same position as the back end of the taper, or further back than the back end of the taper. According to this configuration, when the tool comes into contact with the inner periphery of the front end of the bonnet, the tool can be guided toward the engaging portion along the taper. Therefore, it becomes easier to engage the tool with the engagement portion.

Preferably, the water faucet is equipped with the above-mentioned water stop valve. According to this configuration, it is possible to provide a faucet that exhibits the effects of the above-mentioned water stop faucet.

According to the water stop valve of the present invention, workability when operating the water stop valve is improved.

A perspective view of a faucet. A perspective view of a water stop valve. An exploded perspective view of a water stop valve. A plan view of a water stop valve. A side view of a water stop valve. A cross-sectional view of a water stop valve in a water discharging state. A cross-sectional view of the water stop state at the water stop destination. A perspective view of the spindle. The perspective view of the spindle of a modification. The perspective view of the spindle of another modification. FIG. 2 is a sectional view of a conventional water stop valve.

An embodiment of a water stop valve will be described.
As shown in FIG. 1, a faucet 10 is installed on a wall 11 that is a counter of a kitchen cabinet. The faucet 10 includes a cylindrical mounting base 12 disposed on a wall 11, a cylindrical faucet main body 13 mounted on the mounting base 12, and an operating lever 14 mounted on the top of the faucet main body 13. , and a water discharge head 15 projecting diagonally upward from the faucet body 13, and is configured as a single lever faucet.

A water supply channel 16 (see FIG. 6) and a hot water supply channel (not shown) are formed inside the faucet body 13 and the mounting base 12. One end of a water supply pipe (not shown) is connected to the water supply channel 16, and the other end of the water supply pipe is connected to a water supply source. One end of a hot water supply pipe (not shown) is connected to the hot water supply path, and the other end of the hot water supply pipe is connected to a hot water supply source.

Inside the faucet body 13, there is a valve mechanism (not shown) that mixes water flowing through the water supply channel 16 and hot water that flows through the hot water supply channel, and a spout that supplies the mixed water that has flowed through the valve mechanism to the water spouting head 15. It has a waterway (not shown). By operating the operating lever 14, the valve mechanism can be operated to stop water from being discharged from the water discharging head 15, switch between hot and cold water, and adjust the mixing of hot and cold water.

As shown in FIG. 1, a water stop valve 20 is attached to the mounting base 12 and is capable of turning off the water from the water faucet 10 regardless of the operation of the valve mechanism. The water stopcocks 20 are provided at two substantially opposing locations on the mounting base 12 in the radial direction.

As shown in FIG. 2, specifically, openings 12a are formed at two substantially opposing locations in the radial direction of the mounting base 12, and a water stop plug is provided in a threaded groove 12b provided on the inner periphery of each opening 12a. The water stop valve 20 is attached in a state in which a screw groove 30b provided on the outer periphery of one end of the water stop valve 20 is screwed together. The two water stop valves 20 are configured to have the same shape, and one of the two water stop valves 20 is configured to be able to bring the water supply channel 16 into a water stop state, and the other water stop valve 20 is configured to make it possible to bring the hot water supply channel into a water stop state. It is configured to be possible.

The stopcock 20 will be explained.
As shown in FIG. 3, the water stop valve 20 includes a cylindrical bonnet 30 and a spindle 40 that is attached to the bonnet 30 in a state where it is screwed into the inner circumference of the bonnet 30. The stopcock 20 further includes an O-ring 31 attached to the bonnet 30, an O-ring 41 attached to the spindle 40, a packing 42, and a screw 43. The water stopcock 20 is constructed by assembling the above-mentioned members.

The bonnet 30 will be explained.
As shown in FIGS. 3 to 5, a flange portion 30a projecting radially outward is formed in the axially central portion of the bonnet 30. As shown in FIGS. A thread groove 30b is provided on the outer periphery of one end of the bonnet 30 in the axial direction (hereinafter also simply referred to as "one end of the bonnet") relative to the flange portion 30a. An O-ring 31 is attached between the thread groove 30b and the flange 30a. The outer diameter of the other end of the bonnet 30 in the axial direction than the flange 30a (hereinafter also simply referred to as "the other end of the bonnet") is slightly smaller than the outer diameter of the thread groove 30b.

As shown in FIG. 4, the other end side of the bonnet 30 from the flange portion 30a has a substantially hexagonal outer shape when viewed from the axial direction.
As shown in FIG. 6, one end of the bonnet 30 is provided with a recess 30c that is recessed toward the other end. The recess 30c has a bottom wall 30d facing one end side of the bonnet 30, and a through hole 30e that passes through the bonnet 30 in the axial direction is provided in the center of the bottom wall 30d. At one end of the bonnet 30, a threaded groove 30f is formed on the inner periphery of the through hole 30e. As will be described later, the spindle 40 is attached in a screwed state to this thread groove 30f. The opening on one end side of the bonnet 30 is configured to have a larger opening than the through hole 30e by the width of the bottom wall 30d of the recess 30c.

On the other end side of the bonnet 30 than the thread groove 30f of the through hole 30e, and on the inner periphery of the substantially central portion of the bonnet 30 in the axial direction, a step portion 30g protruding radially inward is provided. The inner diameter of the through hole 30e from the stepped portion 30g to the other end of the bonnet 30 is configured to be substantially constant. In other words, the inner diameter of the through hole 30e on the other end of the bonnet 30 is smaller than the inner diameter of the thread groove 30f on the one end by the protruding height of the stepped portion 30g.

A taper 30h is provided on the inner periphery of the through hole 30e at the other end of the bonnet 30 so that the diameter of the through hole 30e increases toward the other end. In other words, the taper 30h is formed so as to be inclined radially inward from the other end of the bonnet 30 toward one end. In the cross section of FIG. 6, the taper 30h is formed in a straight line. The method for forming the taper 30h is not particularly limited, but for example, a method of grinding the inner periphery of the through hole 30e at the other end of the bonnet 30 can be adopted.

The spindle 40 will be explained.
As shown in FIGS. 3 and 6, the spindle 40 has a cylindrical shape, and a threaded groove 40a is formed on the outer periphery of one end of the spindle 40 in the axial direction (hereinafter also simply referred to as "one end of the spindle"). It is formed. This thread groove 40a is configured to be able to be screwed into a thread groove 30f formed on the inner periphery of one end of the bonnet.

A stepped portion 40b that is recessed inward in the radial direction is provided on the outer periphery of the spindle 40 at the substantially central portion in the axial direction, which is on the other end side in the axial direction than the thread groove 40a of the spindle 40. A circumferential groove 40c is formed on the outer periphery of the other end of the spindle 40 in the axial direction (hereinafter also simply referred to as "the other end of the spindle") than the stepped portion 40b, and an O-ring is formed in this circumferential groove 40c. 41 is attached. This O-ring 41 seals between the inner periphery on the other end side of the bonnet 30 and the outer periphery on the other end side of the spindle 40.

The outer diameter from the stepped portion 40b of the spindle 40 to the other end of the spindle 40 is substantially constant except for the circumferential groove 40c. In other words, the outer diameter of the other end of the spindle 40 is smaller than the outer diameter of the thread groove 40a of the one end by the amount of recess of the stepped portion 40b. When the spindle 40 is screwed onto the bonnet 30, the stepped portion 40b of the spindle 40 comes into contact with the stepped portion 30g of the bonnet 30, thereby restricting movement of the spindle 40 relative to the other end of the bonnet 30.

As shown in FIG. 6, a circular recess 40d is formed at one end of the spindle 40 and is recessed toward the other end in the axial direction. A screw hole 40e is provided approximately at the center of the recess 40d toward the other end. A disc-shaped packing 42 serving as a valve body is fitted into this recess 40d. A through hole 42a is provided in the center of the packing 42. A screw 43 is attached to the screw hole 40e of the spindle 40, passing through the through hole 42a. By sandwiching the packing 42 between the screw head 43a of the screw 43 and the recess 40d of the spindle 40, the packing 42 is fixed to the spindle 40. While fixed to the spindle 40, a portion of the packing 42 in the thickness direction is exposed from the recess 40d.

As shown in FIG. 8, a groove 40f recessed toward one end is formed at the other end of the spindle 40. As shown in FIG. The groove 40f extends in a straight line along the radial direction of the spindle 40, and both ends of the groove 40f in the longitudinal direction are located inside the outer peripheral edge 40g of the spindle 40. That is, both ends of the groove 40f in the longitudinal direction are formed so as not to reach the outer peripheral edge 40g of the spindle 40. Further, both ends of the groove 40f in the longitudinal direction are provided at positions symmetrical with respect to the central axis of the spindle 40. The bottom surface of the groove 40f extends in a direction perpendicular to the axial direction of the spindle 40, and is a flat surface with no irregularities. As will be described later, this groove 40f functions as an engaging portion for engaging a tool for rotating the spindle 40.

The order in which the bonnet 30, spindle 40, O-ring 31, O-ring 41, packing 42, and screw 43 that constitute the water stop valve 20 are assembled is not particularly limited, and the order in which they are assembled can be selected as appropriate.

The materials of the O-ring 31, the O-ring 41, and the packing 42 are not particularly limited, but rubber is preferable because it has excellent sealing properties.
A water stop mechanism using the water stop valve 20 will be explained.

In the following explanation, of the two stopcocks 20 attached to the faucet 10, the stopcock 20 attached to the water supply channel 16 side will be explained, and the explanation of the stopcock 20 attached to the hot water supply channel side will be omitted. do.

First, the mounting base 12 will be explained.
As shown in FIG. 6, a water supply channel 16 is provided within the mounting base 12. The water supply channel 16 includes a first channel 16a extending from the lower part of the mounting base 12, a second channel 16b communicating with the valve mechanism at the upper part of the mounting base 12, and a channel between the first channel 16a and the second channel 16b. and an intermediate flow path 16c to which the water stop valve 20 is attached. The intermediate flow path 16c has an inner diameter larger than that of the first flow path 16a and the second flow path 16b, and the end of the first flow path 16a facing the intermediate flow path 16c functions as the valve port 16d. Water supplied from the water supply source reaches the valve mechanism via the first flow path 16a, the intermediate flow path 16c, and the second flow path 16b. The hot water supply path within the mounting base 12 is similarly configured.

As shown in FIG. 6, the bonnet 30 is attached to the mounting base 12 by screwing the threaded groove 30b on the outer periphery of one end of the bonnet 30 into the threaded groove 12b of the opening 12a of the mounting base 12. At this time, since the other end of the bonnet 30 has a substantially hexagonal outer shape, the bonnet 30 can be easily screwed together using a tightening tool such as a spanner or a wrench.

The O-ring 31 attached to the outer periphery of the bonnet 30 contacts the inner periphery of the opening 12a of the mounting base 12, thereby sealing between the opening 12a of the mounting base 12 and the outer periphery of one end of the bonnet 30. The stopcock 20 is placed in the intermediate flow path 16c within the mounting base 12.

In a state where the spindle 40 is located at the frontmost position with respect to the bonnet 30, the front end of the spindle 40 is located further back than the front end of the bonnet 30. In other words, even when the spindle 40 is at the position closest to the other end with respect to the bonnet 30, the end of the spindle 40 on the other end is closer to one end than the end of the bonnet 30 on the other end. positioned. As a result, the periphery of the groove 40f located at the other end of the spindle 40 is surrounded by the inner periphery of the other end of the bonnet 30.

Further, the front end of the spindle 40 is located further back in the bonnet 30 than the back end of the taper 30h provided in the bonnet 30. In other words, the end of the spindle 40 on the other end side is located closer to one end of the bonnet 30 than the end of the taper 30h provided on the bonnet 30 on the one end side.

As shown in FIG. 6, in a state where the spindle 40 is at the frontmost position with respect to the bonnet 30, the other end of the spindle 40 along the axial direction of the bonnet 30 and the other end of the spindle 40 along the axial direction of the bonnet 30 The distance L from the end is not particularly limited, but is preferably 2 mm or more, more preferably 4 mm or more. By setting the distance L within the above numerical range, when the spindle 40 is moved, a region that can be sealed with the O-ring 41 is preferably created between the outer periphery of the other end of the spindle 40 and the inner periphery of the other end of the bonnet 30. It becomes possible to more reliably contact and stop the tool with the inner periphery of the end on the other end side of the bonnet 30 while securing the tool.

Further, the length M of the taper 30h along the axial direction of the bonnet 30 is not particularly limited, but is preferably 2 mm or more, and more preferably 4 mm or more. When the length M is within the above numerical range, when the tool comes into contact with the inner periphery of the other end of the bonnet 30, it becomes easier to guide the tool along the taper 30h toward the groove 40f.

Since the front end of the spindle 40 is located further back in the bonnet 30 than the back end of the taper 30h provided in the bonnet 30, the distance L is larger than the length M. ing.

As shown in FIG. 6, the packing 42 attached to one end of the spindle 40 is spaced apart from the valve port 16d of the first flow path 16a in the mounting base 12. As shown in FIG. That is, the valve port 16d is in an open state, and water flowing through the first flow path 16a can flow from the valve port 16d through the intermediate flow path 16c to the second flow path 16b. It is composed of Therefore, the faucet 10 is in a state where water can be spouted.

As shown in FIG. 7, when the faucet 10 is brought into a water-stop state, a tightening tool such as a flat head screwdriver is engaged with the groove 40f at the other end of the spindle 40. Spindle 40 is rotated. By rotating the spindle 40, the spindle 40 moves toward one end of the bonnet 30. The packing 42 attached to one end of the spindle 40 comes into contact with the periphery of the valve port 16d of the first flow path 16a, thereby closing the valve port 16d. Thereby, the faucet 10 can be brought into a water-stop state regardless of the operation of the valve mechanism.

The operation of this embodiment will be explained.
As shown in FIG. 6, even when the spindle 40 is in the position closest to the other end with respect to the bonnet 30, the other end of the spindle 40 is lower than the other end of the bonnet 30. is also located at one end. That is, the periphery of the groove 40f located at the other end of the spindle 40 is surrounded by the inner periphery of the other end of the bonnet 30. When an operator engages a tool in the groove 40f to move the spindle 40, the tool comes into contact with the inner periphery of the other end of the bonnet 30, thereby making it possible to roughly determine the groove 40f without relying solely on visual inspection. The tool can be engaged after knowing the correct position. Furthermore, even if the tool comes off the groove 40f during operation, the tool comes into contact with the inner periphery of the other end of the bonnet 30 and stops. It is possible to prevent people from leaving the company.

The effects of this embodiment will be explained.
(1) When an operator engages a tool in the groove 40f in order to move the spindle 40, the tool comes into contact with the inner periphery of the other end of the bonnet 30, so that the operator does not have to rely solely on visual inspection to find the groove. The tool can be engaged after grasping the rough position of 40f. Therefore, even if the stopcock 20 is attached to a location on the faucet 10 that is relatively inconspicuous from the outside, the stopcock 20 can be operated efficiently. Furthermore, even if the tool comes off the groove 40f during operation of the water stop valve 20, the tool can be prevented from coming off from the other end of the water stop valve 20, so the tool can be moved again into the groove 40f. This makes it easier to engage. Therefore, the workability when operating the water stop valve 20 can be improved.

(2) The groove 40f is provided inside the outer peripheral edge 40g at the other end of the spindle 40. If the groove 40f reaches the outer circumferential edge 40g at the other end of the spindle 40, there is a risk that the tool will easily come off the outer circumferential edge 40g. On the other hand, since the groove 40f is provided inside the outer circumferential edge 40g at the other end of the spindle 40 and does not reach the outer circumferential edge 40g, it is possible to prevent the tool from coming off from the groove 40f. . Therefore, the workability when operating the water stop valve 20 can be further improved. Furthermore, since both ends of the groove 40f in the longitudinal direction are provided at symmetrical positions with respect to the central axis of the spindle 40, the tool engaged with the groove 40f can be moved to a position closer to the central axis of the spindle 40. can be placed. In addition, the bottom surface of the groove 40f extends in a direction perpendicular to the axial direction of the spindle 40 and is a flat surface with no unevenness, so that the rotation axis of the tool and the central axis of the spindle 40 are parallel to each other. become more likely to become Due to the effect that the tool can be placed closer to the center axis of the spindle 40 and the fact that the rotation axis of the tool and the center axis of the spindle 40 tend to be parallel to each other, or the synergistic effect of the two, the rotation axis of the tool and Since the center axis of the spindle 40 is more easily aligned with the center axis, the operability is suitably improved.

(3) Since the engaging portion is the groove 40f, the groove 40f can be formed by grinding. Therefore, it becomes easy to provide the groove 40f at the other end of the spindle 40.

(4) The inner periphery of the other end of the bonnet 30 is provided with a taper 30h that is inclined radially inward toward the one end, so that when the spindle 40 is at the position closest to the other end, The other end of the spindle 40 is located closer to one end of the bonnet 30 than the one end of the taper 30h provided on the bonnet 30. When the tool contacts the inner periphery of the other end of the bonnet 30, the tool can be guided toward the groove 40f along the taper 30h. Therefore, it becomes easier to engage the tool in the groove 40f.

(5) The opening on the one end side of the bonnet 30 is larger than the part where the thread groove 30f is formed by the width of the bottom wall 30d of the recess 30c provided on the end on the one end side of the bonnet 30. It is configured. As a result, when the valve port 16d of the first flow path 16a in the mounting base 12 is open, the flow resistance when water flows from the first flow path 16a to the intermediate flow path 16c is reduced, and the intermediate flow It becomes possible to facilitate the flow of water from the path 16c to the second flow path 16b.

This embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- In the present embodiment, the groove 40f as an engaging portion is formed into a single straight line, but the shape of the groove 40f is not limited to a single straight line. For example, it may be formed of a plurality of linear grooves arranged parallel to each other, or may be formed in a cross shape. It may be composed of polygonal depressions.

- In the present embodiment, both longitudinal ends of the groove 40f serving as the engaging portion are located inside the outer peripheral edge 40g of the spindle 40, but the present invention is not limited to this aspect.
As shown in FIG. 9, for example, both ends of the groove 40f in the longitudinal direction may reach the outer peripheral edge 40g of the spindle 40. Since both ends of the groove 40f in the longitudinal direction reach the outer peripheral edge 40g of the spindle 40, the length of the groove 40f can be made relatively long, making it easier to engage the tool. .

- The shape of the engaging portion is not limited to the groove 40f.
As shown in FIG. 10, for example, an oval annular convex portion 40h may be provided at the other end of the spindle 40, and a tool may be engaged with the inside of this convex portion 40h. . That is, the engaging portion may be configured by the oval annular convex portion 40h. Further, the engaging portion may be composed of both the convex portion 40h and the groove 40f. The shape of the annular convex portion 40h is not limited to an ellipse, but may be rectangular. In the embodiment in which the engaging portion is constituted by the convex portion 40h, it is preferable that the end on the other end side, which is the tip of the convex portion 40h, is located closer to one end than the end on the other end side of the bonnet 30. That is, it is preferable that the other end side end of the spindle 40 including the engaging portion be located closer to one end than the other end side end of the bonnet 30 .

- In this embodiment, in a state where the spindle 40 is at the position closest to the other end with respect to the bonnet 30, the end of the spindle 40 on the other end is located closer to one end than the end of the taper 30h on the one end side. However, it is not limited to this mode. The other end of the spindle 40 may be located at the same position as the one end of the taper 30h.

- In this embodiment, as shown in FIG. 6, the taper surface of the taper 30h is formed in a straight line in the cross-sectional view of the water stop valve 20, but the taper surface is not limited to this aspect. The tapered surface of the taper 30h may be formed in a curved shape.

- The taper 30h provided on the inner peripheral side at the other end of the bonnet 30 may be omitted.
- The O-ring 31 attached to the outer periphery of one end of the bonnet 30 may be omitted. For example, an O-ring is attached to the inner periphery of the opening 12a of the mounting base 12 of the faucet 10, and the O-ring seals between the opening 12a of the mounting base 12 and the outer periphery of one end of the bonnet 30. It may be configured as follows.

- The O-ring 41 attached to the outer periphery of the other end of the spindle 40 may be omitted. For example, an O-ring is attached to the inner circumference of the other end of the bonnet 30, and this O-ring seals between the inner circumference of the other end of the bonnet 30 and the outer circumference of the other end of the spindle 40. It may be configured as follows.

- The screw 43 attached to one end of the spindle 40 may be omitted. For example, the screw 43 can be omitted by fixing the packing 42 to one end of the spindle 40 using an adhesive or the like.

- In this embodiment, the packing 42 is directly attached to the end of the spindle 40 on the one end side, but the present invention is not limited to this embodiment. For example, as in the prior art water stop valve 61 shown in FIG. 11, a shaft member may be inserted through one end of the spindle 40, and a packing 42 may be attached to one end of the shaft member. The packing 42 may be urged toward the valve port 16d by a spring attached to the shaft member.

- The water stop valve 20 of this embodiment makes the water stop valve 10 water stop when the spindle 40 moves to one end side with respect to the bonnet 30, and makes the water stop valve 10 water stop when the spindle 40 moves to the other end side with respect to the bonnet 30. Although the faucet 10 was configured to be able to discharge water, the present invention is not limited to this embodiment. When the spindle 40 moves to one end side with respect to the bonnet 30, the faucet 10 is enabled to discharge water, and when the spindle 40 moves to the other end side with respect to the bonnet 30, the faucet 10 is made to be in a water-stop state. may be configured.

- In this embodiment, the faucet main body 13 and the mounting base 12 are constructed as separate members, but the faucet main body 13 and the mounting base 12 may be constructed as a single member.
- The faucet 10 to which the water stop faucet 20 of this embodiment is attached is not limited to a single-lever faucet for kitchen use. For example, it may be attached to a faucet for a bathroom or washroom. It may be attached to a faucet that does not have a hot water supply path but only has a water supply channel 16. Further, the stop valve 20 is not limited to the embodiment in which the water stop valve 20 is directly attached to the water faucet 10, but may be stopped in a water supply pipe connected to the water supply channel 16 of the water faucet 10 or a hot water supply pipe connected to the hot water supply channel of the water faucet 10. A faucet 20 may be attached.

20... Water stopcock, 30... Bonnet, 40... Spindle, 40f... Groove (engaging portion).

Claims (5)

It includes a cylindrical bonnet and a spindle screwed onto the inner periphery of the bonnet, and switches water discharge by rotating the spindle and moving it toward the back and the front with respect to the axial direction of the bonnet. A water stop valve configured to allow
The bonnet has a threaded groove on the inner periphery, and a stepped portion protruding radially inward on the front side of the threaded groove,
The spindle has a thread groove on its outer periphery that is screwed into the thread groove, and has a stepped portion recessed radially inward on the near side of the thread groove,
The stepped portion of the spindle comes into contact with the stepped portion of the bonnet, thereby restricting movement of the spindle toward the front side of the bonnet,
An engagement portion for engaging a tool for rotating the spindle is provided at the near end of the spindle,
A water stop valve characterized in that, in a state where the spindle is at the most forward position, the front end of the spindle is located further back than the front end of the bonnet. The stopcock according to claim 1, wherein the engaging portion is provided inside an outer peripheral edge of the near end of the spindle. The water stopcock according to claim 1 or 2, wherein the engaging portion is a groove provided at the near end of the spindle. The inner periphery of the front end of the bonnet is provided with a taper that slopes radially inward toward the back,
When the spindle is in the most proximal position, the near end of the spindle is at the same position as the back end of the taper, or is further away from the back end of the taper. The stopcock according to any one of claims 1 to 3, which is located on the back side. A water faucet equipped with the water stop valve according to any one of claims 1 to 4.