JP2001004049A - Fixing structure for rotary operating shaft in faucet apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a rotary operating shaft without chattering and improve reliability of a seal between the rotary operating shaft and a shaft case, in the case that the rotary operating shaft driving a valve element of a combination mixing valve is fixed to the shaft case by using a lock ring. SOLUTION: A rotary operating shaft 16 having a cylinder part 20, shaft shoulder part 118, shaft part 120, and a handle connection part 122, is fixedly assembled rotatably in a condition interposing a case shoulder part 112 and an insertion part 118 in an axial direction by a retaining ring 134 mounted in the handle connection part 122 and the shaft shoulder part 118, relating to a shaft case 12 having a cylindrical main unit part 110, case shoulder part 112, and an insertion part 114. At this time, an O-ring 128 is interposed between the shaft shoulder part 118 and the case shoulder part 112 and in an external peripheral angular part in both these shoulder parts in the inside of the shaft case 12, and the O-ring 128, in a condition making it slide abut to an inner surface of the main body part 110 of the shaft case 12, is interposingly pressed in an axial direction by the shaft shoulder part 118 and the case shoulder part 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a rotary operation shaft for driving a valve element in a faucet device to a shaft case.

[0002]

2. Description of the Related Art As a structure for fixing a rotary operation shaft to a shaft case in this type of faucet device, a fixing structure using a retaining ring such as an E-ring is conventionally known. FIG. 9 shows a specific example thereof. The example of the figure is an example of a fixed structure of the rotary operation shaft in the hot and cold water mixing valve.
Indicates a shaft case for holding the shaft case.

In the case of this hot and cold water mixing valve, the rotary operation shaft 200
Operating force applied to the driving member 206 and the bias spring 2
It is transmitted to the valve body 204 via 08,210. Valve 2
04 receives the biasing force of the temperature-sensitive spring 212 on the side opposite to the bias springs 210 and 208. When the rotary operation shaft 200 is rotated to move the drive member 206 in the axial direction by screw feed, the valve body 204 is moved. Spring 20 acting on
8, 210, the urging force of the valve body 204 is increased or decreased.
Are driven in the axial direction, and the water inlet 218 and the hot water inlet 2
The opening of 20 is changed by the water side valve part 214 and the hot water side valve part 216.

The shaft case 202 has a large-diameter cylindrical main body 222, a case shoulder 224 radially inward from the shaft end of the main body 222, and extends axially continuously from the case shoulder 224. An insertion portion 226, and the insertion portion 2
A circular insertion hole 228 is formed on the inner peripheral side of 26.

On the other hand, the rotary operation shaft 200 has a cylindrical portion (large-diameter portion) 230 which is rotatably slidably fitted on the inner surface of the main body 202.
A shaft shoulder 232 extending radially inward from the shaft end of the cylindrical portion 230 along the case shoulder 224; and extending axially continuously from the shaft shoulder 232 to be inserted and rotated through the insertion hole 228. A shaft portion 234 fitted slidably, and a handle connecting portion 2 protruding outside from the insertion portion 226 and connected to the handle
36.

A serration portion 238 is formed on the outer peripheral surface of the handle connecting portion 236, and the serration portion 238 is connected to the handle in an integrally rotating state.

The shaft portion 234 of the rotary operation shaft 200
An annular groove is formed on the outer peripheral surface of the cylindrical portion 230, and an O-ring 240 as a seal ring is fitted and held in each of the annular grooves.
Watertight sealing is provided between the cylindrical portion 230 and the main body 222 of the shaft case 202 and between the shaft portion 234 and the insertion hole 228.
Reference numeral 242 denotes a retaining ring such as an E-ring for fixing the rotary operation shaft 200 to the shaft case 202, and is elastically fitted in an annular groove 244 formed at the base of the handle connecting portion 236.

The rotation operation shaft 200 is formed by the retaining ring 242 and the shaft shoulder 232 in the case shoulder 2 of the shaft case 202.
24 and the insertion portion 226 are rotatably assembled and fixed to the shaft case 202 in a state of being sandwiched in the axial direction.

When the rotary operation shaft 200 is fixed to the shaft case 202 by using the retaining ring 242 in this manner, between the retaining ring 242 and the insertion portion 226 or between the shaft shoulder 232 and the case shoulder 224. It is inevitable that a gap (play) occurs in the vehicle.

Therefore, in order to eliminate this play, conventionally, as shown in the drawing, an O-ring 245 is provided between the retaining ring 242 and the insertion portion 226 outside the shaft case 202.
Is inserted in a state where it is held by a washer 246 having a U-shaped cross section and is compressed in the axial direction.
2 and the play generated between the shaft shoulder 232 and the shaft case 202 are absorbed, so that the rotary operation shaft 200 is fixed to the shaft case 202 without backlash.

The reason why the washer 246 having a U-shaped cross section is used is that the O-ring 245 is simply compressed in the axial direction without using such a washer 246.
This is because the O-ring 245 is bent in the radial direction by the axial pressing force, and as a result, the elastic force in the axial direction is lost, and the rattling prevention function is reduced or lost. That is, the holding groove 2 of the washer 246 having a U-shaped cross section
48, the O-ring 245 is held inside.
The sag of the ring 245 is suppressed, and the elastic force in the axial direction is maintained.

[0012]

However, in the case of this fixed structure, a special washer 246 having a U-shaped cross section is required for fixing the rotary operation shaft 200, and the rotary operation shaft 2
There is a problem that the cost for fixing 00 increases. In the case of the conventional fixed structure, the cylindrical portion 230 of the rotary operation shaft 200 and the shaft case 2 are fixed by the O-ring 240.
02, and between the shaft portion 234 of the rotary operation shaft 200 and the insertion hole 228 of the shaft case 202, these O-rings 240 are also sealed.
Abrasion was caused by the sliding motion associated with the rotation of 00, which could result in reduced sealing performance and water leakage.

[0013]

The structure for fixing a rotary operation shaft according to the present invention has been devised to solve such a problem. According to a first aspect of the present invention, there is provided a rotary operating shaft for driving a valve element by receiving an operating force from a handle, and a shaft case for holding the rotary operating shaft. A main body having a shape, a case shoulder extending radially inward from an axial end of the main body, and an insertion portion having an insertion hole on the inner peripheral side, extending in the axial direction continuously to the case shoulder. On the other hand, the rotary operation shaft has a large-diameter portion rotatably slidably fitted on the inner surface of the main body of the shaft case, and a radially inward portion extending from a shaft end of the large-diameter portion along the case shoulder. Shaft shoulders facing
A shaft portion extending in the axial direction continuously to the shaft shoulder portion and inserted and fitted into the insertion hole, and a handle connecting portion projecting outside from the insertion portion and connected to the handle;
The faucet device, wherein the rotary operation shaft is assembled to the shaft case such that the case shoulder and the insertion portion are sandwiched in the axial direction by the retaining ring attached to the handle connecting portion and the shaft shoulder. A fixed structure of a rotating operation shaft, wherein a seal ring is inserted between the shaft shoulder and the case shoulder inside the shaft case, and the seal ring is axially moved by the shaft shoulder and the case shoulder. It is characterized in that it has been clamped to.

According to a second aspect of the present invention, in the fixing structure according to the first aspect, the seal ring is inserted into outer peripheral corners of the shaft shoulder and the case shoulder, and the seal ring is attached to the main body of the shaft case. It is characterized in that a pressure is applied in the axial direction by the shaft shoulder and the case shoulder in a state of sliding contact with the inner surface.

According to a third aspect of the present invention, in the fixing structure according to the second aspect, a stepped recess is formed in the shaft shoulder along a corner on the outer peripheral side, and the recess is formed in the recess. A part of the seal ring is fitted and held.

According to a fourth aspect of the present invention, in the fixed structure according to any one of the first to third aspects, the rotary operating shaft is a rotary operating shaft for a temperature adjusting operation in the hot and cold water mixing valve.

[0017]

As described above, in the fixing structure according to the first aspect, the seal ring is inserted between the shaft shoulders and the case shoulders inside the shaft case, and the pressure is pressed in the axial direction by both shoulders. According to this fixing structure, the elastic force of the seal ring acts in the axial direction between the shaft shoulder and the case shoulder without using the special washer 246 having a U-shaped cross section shown in FIG. The resilient force can favorably absorb the axial play between the shaft shoulder and the retaining ring and the case shoulder and the insertion portion of the shaft case. Can be assembled and fixed to the shaft case. Here, an O-ring, flat packing, or the like can be used as the seal ring.

The seal ring between the shaft shoulder and the case shoulder also seals between the rotary operation shaft and the shaft case, unlike the O-ring 245 shown in FIG. As a result, the sealing function between the rotary operation shaft and the shaft case is higher than before, and the advantage of improving the reliability of the seal is obtained.

According to a second aspect of the present invention, the seal ring is inserted into the outer peripheral corners of the shaft shoulder and the case shoulder, and the seal ring is slidably contacted with the inner surface of the main body of the shaft case. With this structure, the seal between the rotary operation shaft and the cylindrical portion of the shaft case can be sealed by the seal ring inside the shaft case.

In this case, a stepped recess may be formed along the outer peripheral corner of the shaft shoulder, and a part of the seal ring may be fitted and held therein. Item 3), in this way, even when the seal ring is pressed in the axial direction, the seal ring is in a state of being constrained in the radial direction, so that the seal ring is deformed in the radial direction by the axial pressure. Can be effectively prevented.

The present invention is applicable as a structure for fixing a rotary operation shaft in various faucet devices, but is suitable as a structure for fixing a rotary operation shaft for temperature adjustment operation in a hot and cold water mixing valve. ).

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a thermostatic hot / water mixing valve having a shaft case 12 and a valve case 14, which are screwed together at their axial ends. Reference numeral 16 denotes a rotary operation shaft having a serration portion 18, and the serration portion 18 is connected to the rotary handle in an integrally rotating state.

The rotary operation shaft 16 has a large-diameter cylindrical portion 20 inside the shaft case 12. This cylindrical part 20
A female screw portion 22 is formed on an inner peripheral surface of the drive member 24. The female screw portion 22 is screwed to a male screw portion 26 on an outer peripheral surface of a driving member 24 having a cylindrical shape. The driving member 24 is a member for driving a valve body 32, which will be described later, and moves forward and backward in the axial direction, that is, in the left-right direction in the drawing by the screw feed of the female screw portion 22 and the male screw portion 26 with the rotation of the rotary operation shaft 16. Let me do.

The valve case 14 has a water inlet 28 and a hot water inlet 30 which are formed in an arc shape in the circumferential direction and penetrate the valve case 14 in and out, and are formed at a predetermined distance in the axial direction. The valve case 1 is connected to the water inlet 28 and the hot water inlet 30.
The water and hot water flowing into the inside 4 are mixed in the mixing chamber 31 and then flow out leftward in the figure.

On the other hand, a valve body 32 is fitted inside the valve case 14 so as to be slidable in the axial direction, and the opening of the water inlet 28 and the hot water inlet 30 is caused by the axial movement of the valve body 32. Is controlled. The valve body 32 has a cylindrical water-side valve portion 34 and a cylindrical hot-water valve portion 36, which are provided apart from each other in the axial direction. On the other hand, in the valve case 14, a portion between the water side valve portion 34 and the hot water side valve portion 36 protrudes inward, and the water side valve seat surface 40 and the hot water side valve seat surface 42 are formed on the protruding portion 92. Is formed.

The water-side valve portion 34 and the hot-water-side valve portion 36 have annular grooves on their outer peripheral surfaces, and ring-shaped seal members 44 are mounted in these annular grooves. Watertight and slidably fitted to the inner peripheral surface.
The water side valve portion 34 and the hot water side valve portion 36 are
Are connected to one another in the axial direction.

Here, the central shaft portion 38 has a cross-shaped cross section as shown in FIG. That is, the central shaft portion 38
Has a plate-like portion 39 protruding from the center in the radial direction, and forms a passage for water and hot water between the plate-like portions 39 and 39. The central shaft portion 38 is integrally connected to the hot water side valve portion 36 at the axial end portion and the outer peripheral portion of each plate portion 39. That is, in this example, the central shaft portion 38 and the hot water side valve portion 36 are integrally formed. In this example, the valve 3
2 is made entirely of resin.

The valve body 32 is moved leftward in FIG. 1 so that the water-side valve portion 34 comes into contact with the water-side valve seat surface 40 and the water inlet 28
On the other hand, the hot water side valve portion 36 is largely separated from the hot water side valve seat surface 42 to increase the opening degree of the hot water inlet 30. On the other hand, the hot water side valve portion 36 abuts on the hot water side valve seat surface 42 and shuts off the hot water inflow port 30 by the rightward movement in the figure, while the water side valve portion 34 is largely separated from the water side valve seat surface 40. Water inlet 2
8 is increased. The water inlet 28 and the hot water inlet 30 are opened at an intermediate position between them, and the openings are changed to change the inflow amounts of water and hot water.

The axial end of the valve case 14, specifically, FIG.
A ring-shaped first spring support 46 is attached to the middle left end by a lock between a locking claw 47 formed on the first spring support 46 and a locking hole 48 formed on the valve case 14. A temperature-sensitive spring 50 made of a shape memory alloy is provided in the first spring support 46.
Is in contact with one end.

The other end of the temperature sensing spring 50 is in contact with the valve element 32, and the valve element 32 is biased rightward in FIG. Here, the temperature sensing spring 50 changes the spring force according to the level of the mixed water temperature in the mixing chamber 31. That is, when the temperature increases, the urging force increases, and when the temperature decreases, the urging force decreases.

A valve shaft 52 mainly functioning as a pull rod is assembled to the valve body 32 by screw connection. Specifically, a female screw hole 54 is formed in the central shaft portion 38 of the valve body 32 at an intermediate portion between the water-side valve portion 34 and the hot-water-side valve portion 36, and a male screw at the left end portion of the valve shaft 52 in the drawing is formed there. The part 56 is screwed. Thereby, the valve body 32 and the valve shaft 52 move integrally in the axial direction.

Here, the valve shaft 52 is retracted rightward in the figure by the rotation of the rotary operation shaft 16 in the reverse direction, and functions to forcibly contact the hot water side valve portion 36 with the hot water side valve seat surface 42.

A ring-shaped second spring bearing 58 is mounted on the driving member 24. The second spring receiver 58 has elastic arms 59 extending axially from the bottom at two locations separated by 180 ° in the circumferential direction. It is hung on 62. Here, the second spring bearing 58 is relatively movable in the axial direction with respect to the drive member 24 in a state where the hook 60 is positioned in the concave portion 64 of the drive member 24.

One end of a first bias spring 66 is in contact with the bottom of the second spring receiver 58. The other end of the first bias spring 66 is in contact with an end of the drive member 24 and an inward flange 70 via a stopper ring 68.

Reference numeral 72 denotes a second bias spring, one end of which is fitted on the inward flange 76 of the water-side valve portion 34 and the other end of which is slidably fitted on the valve shaft 52. 74 respectively. Note that the water side valve portion 34 is
And is fitted to a central shaft portion 38 having a cross-shaped cross section integral with the hot water side valve portion 36, and an inward flange portion 76 is in contact with the tip of the central shaft portion 38. .

In this embodiment, the valve body 32 is urged leftward in the figure by the first bias spring 66 and the second bias spring 72 housed in the spring chamber 78, while the mixing chamber 31
Is biased rightward in the figure by a temperature-sensitive spring 50.

The valve shaft 52 is provided with a large-diameter flange-shaped head 80 at the right end in the figure, and the head 80 is provided with an engagement groove 81 for tool engagement. The valve shaft 52 is designed so that a tool can be engaged with the engagement groove 81 and the tool can be rotated.

The valve shaft 52 is also provided with an intermediate flange portion 82 at an intermediate portion in the axial direction.
2, the third spring bearing 74 comes into contact with the right side in the figure. The inner diameter of the second spring bearing 58 is larger than that of the intermediate flange portion 82 so that the second spring bearing 58 can pass through the intermediate flange portion 82 in the axial direction. The drive member 24 has an inner diameter larger than the head portion 80 of the valve shaft 52.

A notch is formed at the axial end of the central shaft portion 38 in the valve body 32, and an elastic piece 84 (see FIGS. 2 and 4) extending in the axial direction is formed between the notches. ing. In addition, a communication hole that allows the mixing chamber 31 to communicate with the spring chamber 78 is formed by the notch. On the inner surfaces of these elastic pieces 84, inwardly engaging projections 86 are provided as shown in FIG. An inclined cam surface 88 is formed on each of the inward engaging projections 86.

On the other hand, a flange portion is formed on the valve shaft 52 in the vicinity of the shaft end, more specifically, in a portion adjacent to the male screw portion 56, and the flange portion has an outward engaging projection 90.
Is configured.

The inward engaging projections 86 on the valve element 32 side.
And the outward engaging projection 90 on the valve shaft 52 side is in an axially engaged state under a screw connection state of the valve shaft 52 and the valve body 32, and the engaging operation causes the valve shaft 52 to move from the valve body 32. It has been stopped.

As shown in FIG. 3, the shaft case 12 has a large-diameter cylindrical main body 110, a case shoulder 112 extending radially inward from the shaft end of the main body 110, and a case shoulder. An insertion portion 114 is provided which extends in the axial direction continuously from the insertion portion 112. The insertion portion 114 has a circular insertion hole 11 on the inner peripheral side.
6 are formed.

On the other hand, the rotary operation shaft 16 includes a cylindrical portion (large-diameter portion) 20 rotatably slidably fitted on the inner surface of the main body 110,
A shaft shoulder 118 extending radially inward from the shaft end of the cylindrical portion 20 along the case shoulder 112, and extends axially continuously from the shaft shoulder 118, and is inserted through the insertion hole 116 and rotated and slid. A shaft portion 120 is fitted so as to be able to fit, and a handle connecting portion 122 protruding outside from the insertion portion 114 and connected to the handle. The serration portion 18 is formed on the outer peripheral surface of the handle connecting portion 122. In addition, a stepped concave portion 124 is formed in an annular shape along the outer peripheral corner of the shaft shoulder 118 of the rotary operation shaft 16.

An annular groove is formed in the outer peripheral surface of the shaft portion 120 and the cylindrical portion 20 of the rotary operation shaft 16, and an O-ring 126 as a seal ring is fitted and held in each of the grooves. Cylindrical part 2
0 and the body 110 of the shaft case 12 and the space between the shaft 120 and the insertion hole 116 are hermetically sealed.

Reference numeral 134 denotes a retaining ring such as an E-ring for fixing the rotary operation shaft 16 to the shaft case 12, and is elastically fitted into an annular groove 136 (see FIG. 6) formed at the base of the handle connecting portion 122. Is being worn.

The rotation operation shaft 16 uses the retaining ring 134 and the shaft shoulder 118 to move the case shoulder 112 and the insertion portion 114 of the shaft case through washers 130 and 132.
Further, it is rotatably assembled and fixed to the shaft case 12 in a state of being sandwiched in the axial direction via an O-ring 128 serving as a seal ring interposed between the shaft shoulder 118 and the case shoulder 112.

Here, the O-ring 128 is formed in an annular recessed portion 1 formed in an annular shape along the outer peripheral corner of the shaft shoulder 118.
24 is held in a state in which a part thereof is fitted,
That is, the O-ring 128 slides on the inner surface of the main body 110 by the shaft shoulder 118 and the case shoulder 112 while the three surfaces are constrained by the stepped concave portion 124 and the inner surface of the main body 110 of the shaft case 12. It is squeezed in the axial direction.

In the hot water mixing valve 10 of this embodiment, the rotary operation shaft 1
When the rotary member 6 is rotated (forward rotation), the driving member 24 is moved to the position shown in FIG.
Move forward to the middle left. As a result, the valve body 32 is
The urging force of the first bias spring 66 and the second bias spring 72 urging in the middle left direction is increased, and the valve element 32 is shifted left in the figure.

When the valve element 32 is shifted leftward, the leftward biasing force of the first bias spring 66 and the second bias spring 72 and the rightward biasing force of the temperature sensing spring 50 are in a state of being balanced. When the temperature of the mixed water of hot water and hot water flowing from the water inlet 28 and the hot water inlet 30 fluctuates in this state, the temperature-sensitive spring 50 increases or decreases the urging force to finely move the valve body 32 in the left-right direction. Thereby, the temperature of the mixed water is maintained at the set temperature.

On the other hand, when the rotary operation shaft 16 is rotated in the reverse direction, the driving member 24 moves rightward in the drawing, and the urging forces of the first bias spring 66 and the second bias spring 72 decrease, whereby the valve The body 32 is shifted rightward in the figure. At the shift position, the temperature of the mixed water is adjusted by increasing or decreasing the urging force based on the temperature sensing of the temperature sensing spring 50.

In the hot water mixing valve 10 of this embodiment, when the valve body 32 is pushed leftward in the drawing, the operating force of the rotary operation shaft 16 is applied to the driving member 24, the first bias spring 66, and the second bias spring 72. Act on the valve body 32 via the On the other hand, a rightward pressing force on the valve body 32 in the figure is applied by the temperature-sensitive spring 50. The pushing force by the temperature-sensitive spring 50 is weak when the temperature of the mixed water is low, and is insufficient to completely stop the inflow of the hot water by bringing the hot water-side valve portion 36 into contact with the hot water-side valve seat surface 42. It may be.

At this time, when the rotation operation shaft 16 is rotated in the reverse direction, the operation force is applied to the driving member 24, the second spring bearing 58,
The first bias spring 66 and the stopper ring 68 act on the head 80 of the valve shaft 52. That is, a drawing force to the right in the drawing is applied to the valve shaft 52, whereby the hot water side valve portion 36 is forcibly brought into contact with the hot water side valve seat surface 42, and the hot water inlet 30 is completely shut off.

In the case of the hot water mixing valve 10 of this embodiment, the valve case 1
The portion between the water-side valve portion 34 and the hot-side valve portion 36 in FIG. 4 protrudes inward, and the water-side valve seat surface 40 and the hot-side valve between the water-side valve portion 34 and the hot-side valve portion 36. Due to the formation of the seat surface 42, if the valve body 32 is formed in advance integrally, the valve body 3
2 cannot be assembled. Similarly, if the valve shaft 52 is integrally formed with the valve body 32, the third spring receiver 74 and other members cannot be assembled.

Therefore, in the present embodiment, the water side valve portion 34 and the hot water side valve portion 36 of the valve body 32 are separated and separated from each other and assembled together, and similarly, the valve shaft 52 is connected to the valve body 3.
2 and is configured separately from each other and assembled to each other.

FIGS. 4 to 7 show an assembling procedure in the hot and cold water mixing valve 10 of this embodiment. The procedure for assembling the hot and cold water mixing valve 10 of this embodiment will be described below with reference to these figures. First, FIG.
As shown in FIG. 7, the valve shaft 52, the stopper ring 68, the first bias spring 66, the second spring bearing 58, and the third spring bearing 74 are provided.
And the drive member 24 are assembled. And in that state, FIG.
Further, the second bias spring 72 and the water-side valve portion 34 are assembled as shown in FIG.

On the other hand, separately from this, the hot-water-side valve portion 36, the temperature-sensitive spring 50 and the first spring receiver 46 integrated with the central shaft portion 38 are combined, and these are inserted into the valve case 14 from opposite directions. Then, the male screw portion 56 of the valve shaft 52 is connected to the valve body 32.
Into the female screw hole 54, i.e., the female screw hole 54 formed in the central shaft portion 38 integral with the hot water side valve portion 36, and connect the members together and assemble them inside the valve case 14.

At this time, the male screw portion 56 is inserted into the female screw hole 5.
When screwing the valve shaft 4, the valve shaft 52 is rotated at the head 80 at the shaft end. The male screw portion 56 of the valve shaft 52 is screwed into the female screw hole 54 of the central shaft portion 38 by the rotation operation, and the outward engagement protrusion 90 of the valve shaft 52 is engaged with the inward engagement of the valve body 32 at a certain point. It contacts the projection 86.

When the valve shaft 52 is further screwed in,
The outward engaging projection 90 of the valve shaft 52 rides over the inward engaging projection 86 while elastically deforming the inward engaging projection 86, that is, the elastic piece 84 outward, where the male screw portion 56 is completely in the female screw hole 54. And screwed into
At the stage where the outward engaging projection 90 has passed over the inward engaging projection 86, the engaging projections 90 and 86 are axially engaged with each other, whereby the valve shaft 52 is prevented from coming off the valve body 32. .

When one engaging projection 90 gets over the other engaging projection 86, a cam surface 88 is formed on the engaging projection 86 and the engaging projection 86 is formed on the elastic piece 84. 90 can easily get over the engaging projection 86 in the axial direction.

After assembling the valve shaft 52, the valve body 32, the valve case 14, etc., as described above, or prior to this, FIG.
The rotary operation shaft 16 is assembled to the shaft case 12 as shown in FIG. 1, and then the shaft case 12 is screwed to the valve case 14 as shown in FIG. The whole can be in an assembled state.

According to the fixing structure of the present embodiment as described above, the elastic force of the O-ring 128 is applied to the shaft shoulder 118 and the case shoulder without using the special washer 246 having a U-shaped cross section shown in FIG. 112, the shaft shoulder 118 and the snap ring 134
The axial play between the shaft case 12 and the case shoulder 112 and the insertion portion 114 of the shaft case 12 can be favorably absorbed, and the rotary operation shaft 16 can be assembled and fixed to the shaft case 12 without play. .

The O-ring 128 between the shaft shoulder 118 and the case shoulder 112 also serves as the main body 11 of the shaft case 12.
Also, the O-ring 245 shown in FIG. As a result, the sealing function between the rotary operation shaft 16 and the shaft case 12 is higher than before, and the reliability of the seal is improved.

In this embodiment, the O-ring 128 is constrained in the radial direction in a state where the O-ring 128 is compressed in the axial direction. Therefore, the O-ring 128 is effectively deformed in the radial direction by the axial compression. Is prevented.

FIG. 8 shows another embodiment of the present invention. In the example of FIG. 8A, an annular groove 138 is provided on the inner surface of the case shoulder 112, and an O-ring 140 as a seal ring is provided therein. In this example, the case shoulder 112 and the shaft shoulder 118 press the shaft in the axial direction. 142 is a washer.

On the other hand, in the example (B), an annular groove 144 is formed at the inner peripheral corner of the case shoulder 112, and an O-ring 146 as a seal ring is fitted and mounted therein. It is pressed in the axial direction by the shaft shoulder 118. Here, the O-ring 146 is in sliding contact with the outer peripheral surface of the shaft portion 120 to seal between the shaft case 10 and the rotary operation shaft 16. In addition, 148 is a washer.

Although the embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is not limited to the case where the seal ring is O.
It is possible to use a flat packing or the like in addition to the ring, and to make various modifications without departing from the spirit of the invention.

[Brief description of the drawings]

FIG. 1 is a view showing a hot-water mixing valve according to an embodiment of the present invention in an assembled state.

FIG. 2 is a partially cutaway perspective view showing a main portion of the hot and cold water mixing valve of the same embodiment in a disassembled state.

FIG. 3 is a partially cutaway perspective view showing a main part of the hot water mixing valve of the same embodiment, which is different from FIG.

FIG. 4 is an explanatory diagram illustrating a first step of an assembling procedure of the hot and cold water mixing valve of the same embodiment.

FIG. 5 is an explanatory diagram of a step subsequent to FIG. 4 in an assembling procedure of the hot water mixing valve of the same embodiment.

FIG. 6 is an explanatory diagram of steps different from those of FIGS. 4 and 5 in an assembling procedure of the hot and cold water mixing valve of the same embodiment.

FIG. 7 is an explanatory diagram of steps following FIGS. 4, 5, and 6 in the assembling procedure of the hot and cold water mixing valve of the same embodiment.

FIG. 8 is a diagram showing a main part of another embodiment of the present invention.

FIG. 9 is a diagram of a conventional hot and cold water mixing valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hot water mixing valve 12 Shaft case 16 Rotational operation shaft 20 Cylindrical part 32 Valve body 110 Main body part 112 Case shoulder 114 Insertion part 116 Insertion hole 118 Shaft shoulder part 120 Shaft part 122 Handle connection part 124 Depression 126,128,140 146 O Ring 134 retaining ring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mamoru Hashimoto 5-1-1 Koiehonmachi, Tokoname-shi, Aichi F-term in Inax Co., Ltd. (Reference) 2D060 BB01 3H067 AA12 CC33 DD03 DD12 DD22 ED20 FF01 GG13

Claims (4)

[Claims] 1. A rotary operating shaft for driving a valve element by receiving an operating force from a handle, and a shaft case for holding the rotary operating shaft, wherein the shaft case has a large-diameter cylindrical main body. A case shoulder that faces radially inward from the shaft end of the main body;
An insertion portion having an insertion hole on the inner peripheral side, which extends in the axial direction continuously to the case shoulder portion, while the rotation operation shaft includes:
A large-diameter portion rotatably slidably fitted on the inner surface of the main body of the shaft case; a shaft shoulder extending radially inward from the shaft end of the large-diameter portion along the case shoulder; A shaft portion extending in the axial direction continuously from the shoulder portion and inserted into and fitted into the insertion hole; and a handle connection portion projecting outside from the insertion portion and connected to the handle, the rotation operation being performed. The rotary operation shaft of the faucet device, wherein the shaft is assembled to the shaft case such that the shaft sandwiches the case shoulder and the insertion portion in the axial direction between the retaining ring mounted on the handle connecting portion and the shaft shoulder. Wherein a seal ring is inserted between the shaft shoulder and the case shoulder inside the shaft case, and the seal ring is axially pressed by the shaft shoulder and the case shoulder. A fixing structure of a rotary operation shaft in a faucet device. 2. The fixing structure according to claim 1, wherein the seal ring is inserted between the outer peripheral corners of the shaft shoulder and the case shoulder, and the seal ring is slidably contacted with the inner surface of the main body of the shaft case. A structure for fixing a rotary operation shaft in a water faucet device, wherein the shaft is pressed in the axial direction by the shaft shoulder and the case shoulder in a state. 3. The fixing structure according to claim 2, wherein a stepped recess is formed in the shaft shoulder along a corner on the outer peripheral side, and a part of the seal ring is formed in the recess. The fixing structure of the rotary operation shaft in the faucet device, wherein the rotary operation shaft is fitted and held. 4. A rotary operation in a water faucet device according to claim 1, wherein said rotary operation shaft is a rotary operation shaft for a temperature adjusting operation in a hot and cold water mixing valve. Shaft fixed structure.