JP4462585B2 - Single lever type hot and cold water faucet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single lever type hot and cold water mixing faucet, and more particularly to a dry sliding type single lever type hot and cold water mixing faucet that can improve operability.
[0002]
[Prior art]
Single lever type hot and cold water mixing taps that close and open by rotating a single lever up and down and left and right are popular.
The single lever type hot / cold water mixing faucet has a valve structure in which a movable valve body and a fixed valve body are disposed in a mixed water flow path, and a dry sliding type in which a mixed water flow path is formed in the valve body. There is.
A dry lever type and an underwater sliding type single lever type hot and cold water mixing tap will be described with reference to FIGS. 11 and 12. FIG. 11A is a cross-sectional view of a dry sliding type, FIG. 11B is a view showing a sliding contact surface of the movable valve body 5, and FIG. 11C is a view showing a sliding contact surface of the fixed valve body. is there. FIG. 12 is a sectional view of an underwater sliding type.
12 has a bottom plate 8 at the bottom of the housing 4, and the fixed valve body 6 is located on the bottom plate 8 with respect to the housing 4. It is fixed and provided in close contact with the bottom plate 8. A movable valve body 5 is provided above the fixed valve body 6 and is freely slid by a handle lever 9 to be engaged.
A lever holder 3 is provided on the upper part of the movable valve body 5 so as not to leak liquid from the housing 4 by seal members 7a and 7b. The lever shaft 3 is held by the lever holder 3 via the pin 2a. The movable valve body 5 in the housing 4 can be rotated and linearly moved.
In such an underwater sliding type single lever type hot / cold water mixing faucet, the flow rate and mixing ratio of hot water and cold water supplied from the hot water hole 6a and the cold water hole 6b are adjusted by the rotation and linear motion of the movable valve body 5. The mixture is mixed in the space 4a in the housing 4 and discharged from the discharge hole 4b through a faucet (not shown). Thus, since the sliding of the movable valve body 5 and the fixed valve body 6 accompanying rotation and linear motion is performed in the mixed water or the like, the operating torque of the handle lever 9 can be kept low. However, for example, since the seal member 7a serves as both a seal in the space 4a and an axial bearing, there is a problem that the seal member is easily damaged or leaks.
[0003]
As a structure for preventing water leakage of the sealing member, there is a dry sliding type single lever type hot and cold water mixing tap 1 shown in FIG.
11 has a fixed valve body 6 and a movable valve body 5 provided in a housing 4, and the movable valve body 5 is slid freely by a handle lever 9 to be engaged. . The handle lever 9 is fixed by the lever shaft 2 and transmits its movement to the movable valve body 5. 3 is a lever holder.
The bottom surface of the fixed valve body 6 is fixed to the bottom plate 8 via a packing 7. The fixed valve body 6 has a hot water hole 6a, a cold water hole 6b and a mixed water discharge hole 6c, and hot water and water flowing in from the hot water holes 6a and 6b are mixed in the mixing chamber 5a of the movable valve body 5 to be mixed water. It discharges from the faucet which abbreviate | omitted illustration through the discharge hole 6c. Thus, since hot water and water are discharged from the mixed water discharge hole 6c without passing through the space 4a in the housing 4, liquid leakage from the housing 4 does not occur, and the seal and the bearing can be separated. The member is not damaged.
[0004]
[Problems to be solved by the invention]
However, in the single lever type hot / cold water faucet 1 having a dry sliding type valve structure, the sliding contact surface between the movable valve body 5 and the fixed valve body 6 is in a dry state, and the operating torque of the handle lever 9 is Has a problem that it rises compared to the underwater sliding type single lever type hot and cold water mixing tap 10. Even when lubricating grease is applied to the sliding contact surface between the movable valve body 5 and the fixed valve body 6, there is a problem that the operating torque increases with time. On the other hand, there is a need for a single lever type hot / cold water faucet 1 that is non-grease and has a dry sliding type valve structure in terms of environmental hygiene.
[0005]
The present invention has been made to address such problems, and an object thereof is to provide a dry sliding type single lever type hot and cold water mixing faucet that can improve operability in a non-grease state. .
[0006]
[Means for Solving the Problems]
The present invention provides a fixed valve body provided at the bottom of the housing and having a hot water hole, a cold water hole, and a mixed water discharge hole, and is slidably provided on the fixed valve body. Single lever that opens and closes the hot and cold water holes of the fixed valve body by operating a movable valve body having a mixing chamber communicating with the hole on the sliding contact surface with the fixed valve body, and a handle lever engaged with the movable valve body If the overlap between the mixing chamber and the mixed water discharge hole is a water-stopped state from the time of water discharge, or a water-stopped state from the time of water and hot-water mixed discharge, In any of the cases where the water is stopped from the time, a groove capable of contacting at least one of the hot water hole and the cold water hole at the time of water stop is provided on the sliding contact surface of the movable valve body. And
By providing the groove on the sliding contact surface of the movable valve body, water, hot water, or water and hot water exist through the groove on the contact surface where the fixed valve body and the movable valve body are in sliding contact. As a result, water or hot water present on the contact surface exhibits a lubricating effect, and the operating torque of the handle lever 9 is reduced.
[0007]
In addition, the groove provided on the sliding contact surface of the movable valve body has a small recess at the opposite end contacting the hot water hole or the cold water hole provided in the fixed valve body. By having a small recessed part, a small recessed part becomes an air reservoir and the water or hot water supplied to a groove | channel spreads to the whole groove | channel easily.
[0008]
In addition, a plurality of independent recesses are provided on the sliding contact surface of the fixed valve body around the hot water hole, the cold water hole, and the mixed water discharge hole, and at least one of the recesses communicates with the groove when the water stops. It is characterized by that.
A plurality of independent recesses are provided on the slidable contact surface of the fixed valve body, and these recesses and grooves communicate with each other when the water stops, so that water or hot water can be stored, and the fixed valve body and the movable valve body. Therefore, the operability of the handle lever 9 is further improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A movable valve body and a fixed valve body according to the present invention will be described with reference to FIGS. FIG. 1A is a plan view of the movable valve body, and FIG. 1B is a cross-sectional view taken along the line AA. 2A is a plan view of the fixed valve body, and FIG. 2B is a sectional view taken along line BB.
The movable valve body 5 has a mixing chamber 5a and two independent grooves 5b and 5c on the sliding contact surface 5d. Small recesses 5e are formed at the ends of the grooves 5b and 5c. The fixed valve body 6 has a hot water hole 6a, a cold water hole 6b, and a mixed water discharge hole 6c penetrating the valve body. Reference numeral 6 d denotes a sliding contact surface of the fixed valve body 6 that contacts the sliding contact surface 5 d of the movable valve body 5.
The mixing chamber 5a provided in the movable valve body 5 is formed in a concave shape on the sliding contact surface 5d, and the hot water hole 6a, the cold water hole 6b, and the like provided in the fixed valve body 6 by the rotation / straight movement of the movable valve body 5 and The mixed water discharge hole 6c communicates with each other.
[0010]
The two independent grooves 5b and 5c can be in contact with at least one of the hot water hole 6a and the cold water hole 6b provided in the fixed valve body 6 at the time of water stop, and the mixing chamber 5a. Any shape can be used as long as it can be arranged around the periphery. As an example, as shown in FIG. 1, it is arranged at a position that does not directly contact the mixing chamber 5a and in a symmetrical shape surrounding the mixing chamber 5a in an arc shape. Moreover, it arrange | positions so that it may contact | connect the hot water hole 6a, the cold water hole 6b, or both holes at the time of water stop. By using two independent arc-shaped grooves 5b and 5c, a part of the groove 5b or 5c can always be in contact with the holes 6a and 6b at the time of water stoppage. Further, the grooves 5b and 5c are provided with a small recess 5e having a function of an air reservoir at the opposite end in contact with the holes 6a and 6b.
[0011]
The action of the grooves 5b and 5c will be described with reference to FIGS. 3 and 4 showing the overlapping state of the movable valve body 5 and the fixed valve body 6 as seen from the movable valve body 5 side. 3 (a), (b) and (c) show the overlapping state at the time of water stop, and FIGS. 4 (a), (b) and (c) show the overlapping state at the time of water discharge. The movable valve body 5 is indicated by a thick line. Further, the hot water hole 6a, the cold water hole 6b and the mixed water discharge hole 6c formed in the fixed valve body 6 are indicated by horizontal hatching, and the grooves 5b and 5c provided in the movable valve body 5 are indicated by vertical hatching, respectively.
When the hot-water mixed faucet 1 is in a water-stopped state, the mixing chamber 5a of the movable valve body 5 overlaps only with the mixed-water discharge hole 6c (FIGS. 3A, 3B, and 3C). Further, when the overlap between the mixing chamber 5a and the mixed water discharge hole 6 is in a water-stopped state from the time of water discharge (FIG. 3 (a)), when the water-stop state is set from the time of water and hot water mixed discharge (FIG. 3 ( b)) When the water is stopped from the time of hot water discharge (FIG. 3 (c)), the groove 5b and / or 5c provided in the movable valve body 5 is provided with the hot water provided in the fixed valve body 6. It is in contact with the hole 6a and the cold water hole 6b. As a result, water and / or hot water are supplied to the sliding contact surface between the movable valve body 5 and the fixed valve body 6 by the water pressure of hot water or cold water through the grooves 5b and / or 5c, and the lubrication is maintained. The lever operating torque can be kept low.
[0012]
When the hot-water mixed faucet 1 is in the water discharge state, the mixing chamber 5a of the movable valve body 5 overlaps the hot-water hole 6a and / or the cold water hole 6b and the mixed water discharge hole 6c (FIGS. 4A and 4B). ), (C)). Even in this case, a part of the grooves 5b and / or 5c overlaps the hot water hole 6a, the cold water hole 6b or the mixed water discharge hole 6c, and water and / or hot water slides between the movable valve body 5 and the fixed valve body 6. To be supplied.
[0013]
In both the water stop state and the water discharge state, the grooves 5b and 5c are movable valves so that the hot water hole 6a, the cold water hole 6b or the mixed water discharge hole 6c partially overlap and the other part overlaps only the sliding surface. Since it is provided in the body 5, the lubricity is maintained and no liquid leakage occurs.
[0014]
Next, the example which provides a recessed part in the sliding contact surface of the fixed valve body 6 is demonstrated. FIG. 5 is a view showing a sliding surface of the fixed valve body 6 provided with a recess.
A plurality of the recesses 6e are provided in the vicinity of the circumference of the sliding contact surface of the fixed valve body 6 and are independently provided around the hot water hole 6a, the cold water hole 6b, and the mixed water discharge hole 6c. The shape of the recessed part 6e should just be a recessed shape which can hold | maintain water and / or hot water. For example, a circle and a rectangle can be mentioned. Moreover, by providing independently, the water leak etc. by the hot water hole 6a and the mixed water discharge hole 6c communicating through the groove | channels 5b and 5c can be prevented. The plurality of recesses 6e are preferably arranged in a circular shape surrounding the mixed water discharge hole 6c on the sliding contact surface of the fixed valve body 6. By arranging in a circle, even if the grooves 5b and 5c move due to the rotation and linear motion of the movable valve body 5, the plurality of independent recesses 6e and the grooves 5b and 5c can be easily brought into contact with each other.
[0015]
The overlapping state of the movable valve body 5 and the fixed valve body 6 as seen in perspective from the movable valve body 5 side is shown in FIG. 6 when water is stopped, and FIG. 7 is shown when water is discharged. 6 and 7 are shown in the same display method as in FIGS.
In the water stop state, the mixing chamber 5a of the movable valve body 5 overlaps only with the mixed water discharge hole 6c (FIGS. 6A, 6B, and 6C). Further, when the overlap between the mixing chamber 5a and the mixed water discharge hole 6 is in a water-stopped state from the time of water discharge (FIG. 6 (a)), when the water-stopped state is set from the time of water / hot water mixed discharge (FIG. 6 ( b)) When the water is stopped from the time of hot water discharge (FIG. 6C), the groove 5b and / or 5c provided in the movable valve body 5 is provided with the hot water provided in the fixed valve body 6. Simultaneously with the hole 6a and the cold water hole 6b, it is also in contact with the recess 6e. As a result, water and / or hot water is supplied and held in the recess 6e communicating with the grooves 5b and / or 5c. As a result, it becomes easy to maintain the lubrication performance, and the operating torque of the handle lever can be maintained lower than when the recess 6e is not provided.
[0016]
When the hot-water mixed faucet 1 is in the water discharge state, the hot water hole 6a and / or the cold water hole 6b overlaps the mixed water discharge hole 6c in the mixing chamber 5a of the movable valve body 5 (FIGS. 7A and 7B). ), (C)). Also in this case, a part of the grooves 5b and / or 5c is in contact with the hot water hole 6a, the cold water hole 6b or the mixed water discharge hole 6c and at the same time is in contact with the recess 6e. As a result, water and / or hot water is supplied to the sliding contact surface between the movable valve body 5 and the fixed valve body 6 and is held in the recess 6e, thereby maintaining lubrication.
[0017]
【Example】
Using the movable valve body 5 and the fixed valve body 6 provided with the grooves 5b and 5c and the recess 6e shown in FIG. 6, the household single lever type hot and cold water mixing faucet 1 shown in FIG. Moreover, the household single lever type hot / cold water faucet 1 shown in FIG. 11 was assembled and used as a comparative example using the movable valve body 5 and the fixed valve body 6 provided with no grooves and recesses. Durability tests were performed on the examples and comparative examples, and the operating torque of the handle lever was measured. FIG. 8 shows the durability test apparatus (manufactured by NTN Precision Resin Co., Ltd.).
[0018]
The durability test was performed in the cycle shown in FIG. 8 with the handle lever 9 connected to the durability test apparatus. That is, the handle lever 9 was operated as follows. From the upper right end of the water stop state to the lower right end of the cold water discharge state (arrow Rd) → hot water from the lower right end to the lower left end of the hot water discharge state (arrow Pm) → left end of the water stop state from the lower left end Upper part (arrow Lu) → Left end upper part lower left part (arrow Ld) → Lower left end lower center of hot water 45 ° C water discharge state (arrow Pl) → Central upper part of water stop state from lower center part (Arrow Cu) → From the upper center to the lower center (Arrow Cd) → From the lower center to the lower right end (Arrow Pr) → From the lower right end to the upper right end (Arrow Ru). With the above as one cycle (required time: approximately 25 seconds), an endurance test of 200,000 cycles was conducted. The operating force (N) of the handle lever 9 after a predetermined cycle was measured. The results are shown in FIG. 9 and FIG.
FIG. 9 plots the average values of the operating force (N) during the linear motion of the arrows Rd, Ru, Lu, and Ld in one cycle. FIG. 10 plots the average values of the operating force (N) during the rotational movement of the arrow Pm, the arrow Pl, and the arrow Pr. The maximum and minimum values are also shown.
[0019]
As shown in FIGS. 9 and 10, the single lever type hot and cold water mixing faucet 1 of the embodiment has water, hot water, or water and hot water on the contact surface where the fixed valve body and the movable valve body are in sliding contact with each other. Therefore, the operation force (N) was lower than that of the comparative example, and excellent handle lever operability was exhibited over a long period of time.
[0020]
Also, the same single lever type hot and cold water mixing faucet 1 is assembled except that the movable valve body 5 provided with the grooves 5b and 5c shown in FIG. 1 and the fixed valve body 6 not provided with the recess 6e are used. When the above durability test was performed, the operating force (N) slightly increased in average values for both linear motion and rotational motion, but showed lower operating force (N) than the comparative example.
[0021]
【The invention's effect】
Even if the single lever type hot and cold water mixing faucet of the present invention has a dry sliding type valve structure, a groove contacting at least one of the hot water hole and the cold water hole at the time of water stoppage is provided on the movable valve body. Since it is provided on the sliding contact surface, the lubrication effect can be maintained by water or the like existing through the groove. As a result, the operability of the handle lever is excellent without applying lubricating grease.
[0022]
Further, since the small concave portion is provided at one end of the groove, the small concave portion becomes an air reservoir, so that water or the like can easily reach the entire groove portion and the lubricating effect is improved.
[0023]
In addition, a plurality of recesses are provided on the sliding contact surface of the fixed valve body, and at least one of the recesses communicates with the groove when the water stops, so that the recesses serve as a reservoir for water or hot water, A single lever type faucet with excellent operability can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a movable valve body.
FIG. 2 is a diagram illustrating a fixed valve body.
FIG. 3 is a perspective view of the movable valve body and the fixed valve body when they are stopped when viewed in perspective.
FIG. 4 is a perspective view of the movable valve body and the fixed valve body when they are discharged, as seen in perspective.
FIG. 5 is a view showing a sliding surface of a fixed valve body provided with a recess.
FIG. 6 is an overlapping state diagram of a stationary valve body provided with a movable valve body and a recess when water stops.
FIG. 7 is an overlapping state diagram at the time of water discharge of a fixed valve body provided with a movable valve body and a recess.
FIG. 8 is a diagram showing an endurance test apparatus.
FIG. 9 is a graph plotting operating force (N) during linear motion.
FIG. 10 is a graph plotting operating force (N) during a rotational motion.
FIG. 11 is a view showing a dry sliding type single lever type hot and cold water mixing faucet.
FIG. 12 is a view showing an underwater sliding type single lever type hot and cold water mixing faucet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dry sliding type single lever type hot / cold water mixing faucet 2 Lever shaft 3 Lever holder 4 Housing 5 Movable valve body 5a, mixing chamber 5b, 5c Groove 5d Sliding contact surface 5e Small recessed part 6 Fixed valve body 6a Hot water hole 6b Cold water hole 6c Mixed water discharge hole 6d Sliding contact surface 6e Recess 7 Seal member 8 Bottom plate 9 Handle lever 10 Underwater sliding single lever type hot and cold water mixing faucet

Claims (3)

A fixed valve body provided at the bottom of the housing and having a hot water hole, a cold water hole and a mixed water discharge hole, and slidably provided on the fixed valve body, and communicates with the hot water hole, the cold water hole and the mixed water discharge hole. A single lever that opens and closes the hot and cold water holes of the fixed valve body by operating a movable valve body having a slidable contact surface with the fixed valve body, and a handle lever engaged with the movable valve body A hot water and water mixing faucet,
The sliding contact surface of the movable valve body is provided with two left and right symmetrical arc-shaped grooves that surround the mixing chamber in an arc shape at a position not in contact with the mixing chamber,
If the mixing chamber and the overlap of the mixed water discharge hole, when the water stop state from the time of water discharge, when the water stop state from the time of water and hot water mixing and discharging, which was water stop state than when the hot water discharge At any rotation angle of the movable valve body with respect to the fixed valve body, at the time of water stop , at least one of the two independent arc-shaped grooves is in contact with the hot water hole or the cold water hole . A single lever type hot and cold water faucet characterized by being able to. Each of the two independent arc-shaped grooves has a small recess serving as an air reservoir at an end opposite to a side in contact with a hot water hole or a cold water hole provided in the fixed valve body in a water- stopped state. The single lever type hot and cold water mixing faucet according to claim 1. A plurality of independent recesses are provided on the sliding contact surface of the fixed valve body around the hot water hole, the cold water hole, and the mixed water discharge hole, and at least one of the recesses communicates with the groove when the water stops. The single lever type hot and cold water mixing faucet according to claim 1 or claim 2, wherein

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