JP2001263534A - Changeover valve mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a changeover valve mechanism having a simple structure, eliminating the increase of a manufacturing labor, and dispensing with electrical driving. SOLUTION: This changeover valve mechanism is provided with a spring used as a driving means, loading means such as a damper as the changeover means for a cam mechanism, a link mechanism, and the adjustment of the changeover speed, and a clutch as the means for insulating an unnecessary force in the input.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve mechanism capable of selectively switching flow paths by mechanical power and mechanism.

[0002]

2. Description of the Related Art Conventionally, as a switching valve mechanism for switching a flow path, a plurality of ball valves or solenoid valves for switching a flow path are directly used by an operator, and these are synchronized by control means. Electromagnetic switching valves for switching between water stoppage and water shutoff are known.
There is an advantage that water can be stopped arbitrarily, and the latter is capable of stopping and distributing water by electrical ON / OFF control, and the water discharge time, distribution ratio, and the like can be arbitrarily set by using a timer together. It has the advantage of being adjustable.

[0003]

However, in the ball valve, it is premised that the operator directly operates the ball valve, which requires considerable labor for the operator. In addition, the operation itself varies from person to person, and there is a problem in valve operation reliability. In addition, the solenoid-operated switching valve has a complicated structure and a large weight, which may cause problems in terms of assembly and cost. In addition, because it is an electric type, if for some reason it is impossible to use electricity, or if an electrical failure or power outage occurs, it will not be possible to use it. There is a problem that it is inferior in terms of sex.

An object of the present invention is to solve the above-mentioned problems, and to provide a switching valve mechanism which has a simple structure, does not increase manufacturing labor, and does not require electric drive.

[0005]

In order to solve the above problems, a switching valve according to the present invention is a switching valve rotatably housed in a valve case, comprising: a rotating shaft for operating the switching valve; An urging means using elasticity directly or indirectly connected to the rotation shaft is provided, and a switching mechanism is provided with a cam mechanism so that the flow path can be switched. As a result, since only the mechanical drive and the mechanism operate, it is possible to switch the flow path without using electricity.

Further, as an alternative to the switching means having the above configuration,
A link mechanism is provided, and the flow path can be switched.

[0007] Further, while having the above-described configuration,
For the purpose of adjusting the rotation speed of the switching flight, a load means against the urging means for rotating the shaft is provided.

[0008] Further, while having the above-described configuration,
By providing a transmission force adjusting means for changing the degree of transmission of the urging force from the urging means to the switching means between the urging means and the switching means, the rotation operation at the time of input is directly performed by the switching valve. To the switching valve, so that stable energy and operation can be given to the switching valve. The degree of transmission may be a binary value of intermittent or intermittent, or the transmission ratio may be changed continuously.

Further, a seal member is mounted on the switching valve, and the sealing member is brought into sliding contact with a valve case accommodating the switching valve, thereby providing a water stopping function. It became possible to provide.

[0010] In addition, a self-closing valve that discharges a predetermined amount of water and automatically closes based on a water discharge request, and water that is discharged in synchronization with the valve-opening operation of the self-closing valve, is connected to the switching device. By means, the flow path can be switched. Thereby, only the mechanical drive and mechanism are operated, and during one cycle from the valve opening to the water stoppage, the flow path can be selectively switched, and both the water stoppage and the switching functions can be provided. .

Further, the above-mentioned switching valve is used as a means for cleaning a toilet. This makes it possible to achieve efficient toilet cleaning using a low-cost switching valve that has a simple structure and does not require electricity.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the basic structure of a switching valve mechanism according to the present invention comprises an operating portion for receiving an input, a driving force storing portion for storing and releasing the input energy, and a switching device. It comprises a switching mechanism for determining the system, a switching valve for switching the flow path, and a valve case for housing the switching valve.

The shape of the valve case depends on the switching system of the switching valve, but is cylindrical or semi-cylindrical. Further, the shape of the switching valve body may be a cylindrical shape, a semi-cylindrical shape, or the like as described above so as to fit the valve case. The operation unit has a shape that is easy to grasp, such as a rotating handle, a lever, and a cock. The driving force storage unit is a mechanism for storing and releasing a force, and can be mainly configured by a mainspring, a leaf spring, a coil spring, or the like.

FIG. 2 shows the basic configuration of the switching valve according to this embodiment. As a configuration, a rotary handle 1 for inputting by an operator, a drive shaft 2 connected thereto, and a mainspring 5 via a barrel 4 are connected to the drive shaft 2. It is connected via a gear to a cam shaft 6 on which a cam is formed. Further, the tip of the rack shaft 7 is in contact with the cam of the cam shaft 6, and the rack shaft 7 is arranged to be displaced up and down with the displacement of the cam. The rack shaft 7 penetrates a hole 10 opened in the casing 3, and the hole 10 serves as a guide when the rack shaft 7 is displaced up and down. A gear formed at the right end of the switching valve shaft 8 meshes with the rack shaft 7, and converts the vertical displacement of the rack shaft 7 into forward and reverse rotation of the switching valve shaft 8. Further, the switching valve shaft 8 is inserted into the casing of the switching valve section 9, and the flow path can be switched by forward / reverse rotation of the shaft.

The principle of each operation will be described according to the operation procedure. First, when the operator rotates the rotary handle 1, the mainspring 5 arranged in the barrel 4 is wound to store kinetic energy. Next, when the operator releases the rotary lever 1, the energy of the mainspring 5 is released, and the drive shaft 2 is released.
Rotates in the direction opposite to the direction rotated by the operator. At the same time, the camshaft 6 connected to the drive shaft by a gear receives the rotation, and the camshaft 6 itself also rotates.

FIG. 3 is a schematic configuration diagram of the cam shaft 6 and the rack shaft 7. The lower end of the rack shaft 7 has a hemispherical shape and is in contact with a cam 11 formed on the cam shaft 6. That is, the rotation of the cam shaft 6 is converted into the vertical displacement of the rack shaft 7 through the cam 11. Also, by devising the shape of the cam 11, the displacement of the rack shaft 7 can be arbitrarily determined. As will be described later, by this operation, the outflow port is selectively selected and switched. Next, the rack shaft 7 and the switching valve shaft 8 are connected to each other by a rack and a gear, and the switching valve shaft 8 can be rotated forward and reverse according to the displacement of the rack shaft 7 described above.

FIG. 4 is an exploded perspective view of the switching valve shaft 8 and the switching valve section 9. FIG. 5 is a sectional view of the switching valve section 9 taken along line XX. The switching valve shaft 8 has a gear formed at the right end of the shaft, and a semi-cylindrical or near a coaxial left end.
A switching projection 13 for switching the cylindrical flow path is formed. The flow path is selectively switched by the switching projection 13, which will be described below.

The side surface of the projection of the switching projection 13 is a cylindrical curved surface parallel to the axial direction of the switching valve, and the entire surface is formed on a surface parallel to the cylindrical axis direction of the valve case 14. Port B can be closed. At this time, the fluid flowing in from A flows out from the outflow port C because the outflow port C formed in another location is in an open state. Conversely, when the side surface of the switching protrusion 13 closes the outflow port C, the outflow port B is opened,
The fluid flows out from the outflow port B. The time for alternately switching these outflow ports and maintaining the outflow all depends on the uneven shape of the cam 11 formed on the camshaft 6. This is the switching operation of the present embodiment. Here, the switching protrusion 13 may be formed integrally with the switching valve shaft 8 or may be formed separately.

By devising the form of the switching projection 13 of the switching valve shaft 8, it is possible to enhance watertightness. FIG. 6 shows an exploded perspective view of the embodiment. Characteristically, a packing 15 is mounted on the side surface of the switching protrusion 13 so as to cover the outer periphery of the outlet of the outflow port. This allows
By bringing the packing 15 into sliding contact with the inner wall surface of the cylinder of the valve case 14, watertightness when the outflow port is closed can be improved. By this effect, leakage water due to the poor sealing performance of the closed port can be extremely reduced, and loss of fluid outflow can be eliminated. O instead of this packing
Using a ring has the same effect.

Further, by utilizing the above effects, the switching valve can be provided with a water stopping function. An example is shown in FIG. FIG. 7 is a cross-sectional view taken along the line XX. here,
The packing 15 is mounted on the side surface of the switching protrusion 13, and the inflow port A is closed. This state means a water stop state, and the switching valve section 9 also has a water stop function. If this state is set as an initial water stop state, the shape of the cam 11 is devised, and the operation is properly synchronized with the operation of the switching valve, water stop and arbitrary flow path selection can be performed.

FIG. 8 is a cross-sectional view taken along the line XX similarly to the above.
This is another example in which the switching valve has a water stopping function. The shape of the switching projection 13 is enlarged in the circumferential direction, and in the initial state,
Outflow port B and outflow port C are simultaneously closed. This is the initial water-stop state. Next, by adjusting the rotation angle of the cam, rotating the switching valve shaft counterclockwise, closing only the outflow port B, and opening the outflow port C, the fluid flows out from the outflow port C. Then, if only the outflow port C is closed and the outflow port B is opened, the water flows out from the outflow port B. Even in this method, water can be stopped and an arbitrary flow path can be selected by rotating the switching valve.

FIG. 9 shows another embodiment of the first embodiment. The difference from the above-mentioned switching valve is that a cylindrical cam 16 is adopted from a plate cam as a cam type of the cam 11. Thereby, the displacement (slide) of the rack shaft 17 is performed.
Is changed not in the up-down direction but in the left-right direction, and the arrangement of the switching valve portion 18 is changed by 90 degrees accordingly. However, the operation and the switching effect are almost the same as those in the configuration in FIG. As described above, in the present embodiment, the two-system cam mechanism has been described, but the same effect can be expected even if another type of cam is applied to the switching mechanism. In addition, by arranging the configuration, shape, or intermediate gear of each gear and setting the switching protrusion to return to the initial position in one cycle, regular operation can be provided every time. , Stable operation can be realized.

FIG. 10 shows a second embodiment. The feature of this switching valve is that a link mechanism is employed in the switching mechanism. The operations and effects other than the switching mechanism are substantially the same as those of the first embodiment. The link mechanism of the switching mechanism will be described below.

The link shaft 19 is connected to the drive shaft 2 via a gear, and applies the rotation of the drive shaft 2 to the link shaft 19. When the link shaft 19 rotates, the crank 20 formed there rotates and moves the link a21 and the link b22, which are connecting nodes. The end of the link b22 is connected to the switching valve shaft 23.
, And oscillate around the axis of the switching valve shaft 23. As a result, FIG.
2. As shown in FIG. 13, the outflow port B 'and the outflow port C' can be switched by reciprocating the switching projection 24.

In the present embodiment, one type of link mechanism has been described, but the same effect can be expected even if another type of link mechanism is applied to the switching mechanism. Further, as described in the first embodiment, the switching protrusion 24 of the switching valve shaft 23 is provided.
Then, if packing is installed and the inflow port A 'is closed,
In this mechanism as well, it is possible to stop water, and if the shape of the switching protrusion 24 is enlarged in the circumferential direction and the outflow port B ′ and the outflow port C ′ are simultaneously closed in the initial state, water can be stopped. , Switching and water stopping functions.
Also, in this method, if the configuration and shape of each gear or an intermediate gear is arranged and the switching projection is set to return to the initial position in one cycle, regular operation is obtained. And stable operation can be realized.

FIGS. 14 and 15 show a third embodiment.
The feature is that a damper 26 against the mainspring is arranged to adjust the switching speed. Specifically, a gear 27 is arranged in the middle of the drive shaft 25, and a geared damper 26 connected to the gear is arranged.

As a specific operation, first, the restoring force of the mainspring is reduced by a damper. In other words, in other words, in order to adjust the total amount of water discharged from the output port, the switching speed of the switching valve is adjusted by the damper. Second, the damper can adjust the variation in the restoring force of the mainspring, and can supply a stable rotational force. The mainspring is originally an inexpensive one and has a simple structure in which a leaf spring is spirally wound, so that the degree of variation in the restoring force (torque) caused by manufacturing is large. Another feature is that the generated torque varies depending on the degree of winding of the mainspring itself. That is, the generated torque itself may vary depending on the degree of tightening by the operator. Therefore, a damper is used in the present configuration example to absorb these variations.

Since the damper is a damping system, it generates a force of -Cυ (C: viscous damping coefficient, υ: speed). That is, a negative resistance is generated in proportion to the speed of the driving system. Therefore, taking advantage of these characteristics,
When a force larger than the target value is generated, the damper is suitable for the purpose of suppressing the force, approaching a desired speed, absorbing a large variation factor with the damper, and supplying a stable force. In the present embodiment, the damper has been described as an example. However, as an alternative, a similar effect is exerted by an urging means such as an air brake used in a music box or the like and a torsion coil spring acting in the opposite direction.

FIG. 16 shows a fourth embodiment. The feature is that a clutch mechanism is provided between the urging means (here, the mainspring) and the switching means (here, the cam).

FIG. 17 is an exploded perspective view of the drive shaft portion 28 of the present embodiment. The barrel 4 of the mainspring is passed through the drive shaft a29, and the left end of the drive shaft a29 is assembled to the rotary handle 1. The right end of the drive shaft a29 has a cup shape 30. The inner surface of the drive shaft a29 allows the clutch 31 to be inserted, and
The clutch is formed in accordance with the uneven shape of the outer shape of the clutch so that the clutch does not rotate. Although the clutch 31 has a cylindrical shape, the outer periphery thereof has irregularities for stopping rotation as described above, and has a shape conforming to the irregularities on the inner surface of the cup shape 30. The drive shaft b32 is inserted into the inner cylindrical surface of the clutch cylinder, and is rigidly connected so as not to run idle.
The above is the description of the configuration.

Next, the operation of the clutch 31 will be described. The clutch 31 is called a one-way clutch. For example, when the outer surface of a cylindrical clutch is rotated forward,
The shaft portion on the inner surface of the clutch is disconnected (idling), and when the outer surface of the clutch cylinder is reversed, the shaft portion on the inner surface of the clutch cylinder is kept connected (shaft holding).

The effect will be described below according to the operation mode. As a prerequisite, the clutch 31
The connection state is cut off, and the connection state is maintained at the time of reverse rotation. When the operator rotates the rotary handle 1 in the normal rotation direction, the mainspring is tightly wound and an urging force is generated. However, the rotation is disconnected by the clutch 31 due to the effect of the one-way clutch described above, and the drive shaft b32 does not rotate. Next, at the same time when the operator releases the rotary handle, the urging force of the mainspring is released, and the drive shaft a29 rotates in the opposite direction. At this time, the connection of the clutch 31 is maintained by the effect of the one-way clutch described above.
The drive shaft b32 also rotates synchronously. The subsequent switching method and the mechanism and operation of the switching valve unit are the same as those in the first embodiment or the second embodiment.

The effect of this clutch is that the rotation of the drive shaft when the operator applies a biasing force to the mainspring is not transmitted to the switching valve section 9, which is the final output. That is,
Only the restoring force of the mainspring is sufficient as the force required for the switching valve section 9 to stably switch the fluid, and it can be said that the rotating operation for urging the mainspring is unnecessary. In addition, even when the mainspring is urged, the respective connecting portions and the sliding contact portions are unavoidably slid, so that there is a possibility that abrasion of those portions may be induced. Therefore, arranging the clutch between the mainspring and the switching valve section is also effective in mechanical strength.

Next, a fifth embodiment will be described. As described above, a mechanism capable of switching the switching valve by mechanical driving and operation has been described as a switching valve switching method. These switching mechanisms may be applicable to various switching valves. For example, a self-closing faucet device disclosed in Japanese Patent Application Laid-Open No. 2000-034762 is a self-closing faucet device that discharges a predetermined amount of water based on a water discharge request and includes a self-closing valve that automatically closes. And a distributing valve provided downstream of the self-closing valve and distributing the discharged water to different flow paths in synchronization with a valve opening operation of the self-closing valve. It describes a plug device, and mainly has a configuration in which a flow path is switched by an actuator (such as a stepping motor). Here, if the switching mechanism of the first embodiment to the fourth embodiment is adopted instead of the actuator, the same effect as described above can be exerted.

The switching valve proposed in the present invention is more effective if used as a valve for flushing a toilet. For example, two water supply channels, a toilet bowl side and a drainage side, are provided,
A type of toilet (a flow-switching type siphon jet toilet) that selectively switches between water discharge on the toilet bowl side and water discharge on the drainage side to enhance the cleaning performance of the toilet is generally known. If this method is adopted for the switching valve, further effects can be expected.

[0037]

According to the present invention, it is possible to realize a switching valve mechanism having a simple structure and capable of switching the flow path by mechanical driving and operation without increasing the manufacturing cost by the above-mentioned structure.

[Brief description of the drawings]

FIG. 1 is an example of a basic configuration of first and second embodiments.

FIG. 2 is a configuration diagram of the first embodiment.

FIG. 3 is a schematic configuration diagram of a cam and a rack shaft according to the first embodiment.

FIG. 4 is an exploded perspective view of a switching valve shaft and a switching valve portion.

FIG. 5 is a sectional view of the switching valve section taken along line XX.

FIG. 6 is an exploded perspective view illustrating a state where packing is mounted on the switching valve shaft.

FIG. 7 is a cross-sectional view taken along the line XX in FIG. 5, illustrating a water stop state.

8 is a configuration diagram showing another embodiment in FIG.

FIG. 9 is a configuration diagram showing another embodiment of the first embodiment.

FIG. 10 is a configuration diagram of a second embodiment.

FIG. 11 is a schematic configuration diagram of a link shaft and a switching valve unit.

FIG. 12 is a schematic diagram of a switching valve portion and a link shaft in a second embodiment, and is a diagram illustrating a state at the time of switching.

FIG. 13 is a diagram similar to FIG. 12, showing a state at the time of switching.

FIG. 14 is a configuration diagram of a third embodiment.

FIG. 15 is a perspective view of FIG. 14 as viewed from the Y direction.

FIG. 16 is a configuration diagram of a fourth embodiment.

FIG. 17 is an exploded perspective view of a clutch and peripheral members according to a fourth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotary handle, 2 ... Drive shaft, 3 ... Casing, 4 ...
Barrel, 5 ... spring, 6 ... cam shaft, 7 ... rack shaft, 8 ...
Switching valve shaft, 9: switching valve section, 10: casing hole, 11 ...
Cam, 12: switching valve lid, 13: switching projection, 14: valve case, 15: packing, 16: cylindrical cam, 17: rack shaft, 18: switching valve, 19: link shaft, 20: crank, 21 ... Link a, 22 ... Link b, 23 ... Switching valve shaft, 24 ... Switching projection, 25 ... Drive shaft, 26 ... Damper, 27 ... Gear, 28 ... Drive shaft, 29 ... Drive shaft a, 3
0: cup shape, 31: clutch, 32: drive shaft b

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 2D039 AA02 AC04 BB00 DB00 3H055 AA10 CC03 CC12 DD22 EE02 FF03 FF19 3H063 AA05 AA06 AA08 BB32 DA03 DB13 DB32 DB43 FF09 GG06 GG11 3H067 AA16 AA23 CC11 DD23 DD12 DD13 DD12

Claims (7)

[Claims] A switching valve for rotatably housed in a valve case to switch a flow path, using a rotating shaft for operating the switching valve and elasticity directly or indirectly connected to the rotating shaft. A switching valve mechanism comprising: a bias mechanism; and a cam mechanism as a switching means, and is configured to be switchable. 2. A switching valve for switching a flow path by rotatably housed in a valve case, utilizing a rotating shaft for operating the switching valve and elasticity directly or indirectly connected to the rotating shaft. A switching valve mechanism comprising: a biasing means; and a link mechanism as a switching means, and is configured to be switchable. 3. The switching valve mechanism according to claim 1, further comprising a load unit that adjusts a rotation speed of the switching valve against the urging unit. 4. A switching valve according to claim 1, wherein a transmission force adjusting means for changing a degree of transmission of an urging force from said urging means to said switching means between said urging means and said switching means. A switching valve mechanism characterized by comprising means. 5. The switching valve mechanism according to claim 1, wherein a water stopping function is provided between the switching valve and the valve case. 6. A self-closing valve that discharges a predetermined amount of water based on a water discharge request and automatically closes the water, and discharges water discharged in synchronization with a valve opening operation of the self-closing valve. The switching valve mechanism according to any one of claims 1 to 4, wherein the switching means is configured to be capable of selectively switching the flow path. 7. The switching valve mechanism according to claim 1, wherein the switching valve mechanism is used as a toilet flushing means.