JP2007170521A - Valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve device capable of controlling opening and closing of a plurality of flow passages communicating with a suction port and a discharge port, miniaturizable with simple structure. <P>SOLUTION: This valve device is provided with a valve element 18 arranged in four flow passages formed between one suction port 12 and four discharge ports 13, 14, 15 and 16 and having a passage 18b forming a part of the flow passage, a plurality of slide members 12 driving the valve elements 18 respectively, and a drum 8 having four cam parts 8a, 8b, 8c and 8d driving the slide members 21. The cam parts 8a, 8b, 8c and 8d of the drum 8 are arranged along an axial direction of the drum 8 to have a predetermined distance, and are arranged in positions shifted to a peripheral direction of the drum 8 with each another. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a valve device including a valve body that opens and closes a flow path that connects a suction port for sucking fluid and a discharge port for discharging sucked fluid.

As this type of prior art, there are those shown in Patent Documents 1 to 3. Patent Document 1 discloses an electromagnetic valve including a valve seat that opens and closes a gas passage that connects a gas inlet and a gas outlet, and a plunger that drives the valve seat. Patent Document 2 also discloses a valve actuator for an internal combustion engine that opens and closes a passage by a valve body, that is, a valve. Further, Patent Document 3 discloses a driving device for an electromagnetic valve provided in an internal combustion engine or the like that opens and closes an exhaust port by a valve body, that is, a valve.
Japanese Patent Laid-Open No. 2000-183678 Special table 2004-506826 gazette JP-A-11-101110

  Each of the prior arts described above includes a valve body that opens and closes one flow path that communicates a suction port that sucks a fluid such as gas and a discharge port that discharges the sucked fluid. Nowadays, a plurality of flow paths as described above are provided, and there is a demand for controlling opening and closing of these flow paths. For example, there is one suction port, there are a plurality of discharge ports, and a plurality of flow channels are formed between the suction ports and the discharge ports, and it is desired to control the opening and closing of these flow channels. There is such a request.

  If it is going to employ | adopt the concept of the prior art mentioned above with respect to such a request, a separate valve apparatus will be provided for each of several flow paths. That is, it is necessary to provide a plurality of valve devices. However, when a plurality of valve devices are provided in this way, the overall shape becomes large, and it is easy to place restrictions on the layout design. In addition, there is a problem that the overall structure becomes complicated and the manufacturing cost increases.

  The present invention has been made from the actual state of the above-described prior art, and its purpose is to perform opening / closing control of a plurality of flow paths connecting the suction port and the discharge port, and the structure is simple and the size can be reduced. The object is to provide a valve device that can be realized.

  In order to achieve this object, the present invention includes a valve body that opens and closes a flow path that connects a suction port for sucking fluid and a discharge port for discharging the sucked fluid. A drum having a plurality of passages, the valve bodies being disposed in the plurality of flow paths, a slide member for driving the valve bodies, a cam portion for driving the slide members, and the drum And a motor for rotating the motor.

  In the present invention configured as described above, by rotating the drum by driving the motor, the corresponding slide member is driven via the cam portion of the drum, the corresponding valve element is driven by the slide member, and the valve The channel where the body is placed opens and closes. That is, the opening / closing control of the plurality of flow paths connecting the suction port and the discharge port can be performed by rotating the drum. In addition, since the drum forms a common member for each valve body, the number of parts can be reduced, the structure is simple, and the size can be reduced.

  Further, according to the present invention, in the above invention, a plurality of the cam portions of the drum are provided so as to correspond to the slide members, and the cam portions are respectively provided at a predetermined distance along the axial direction of the drum. And provided at positions shifted from each other with respect to the circumferential direction of the drum.

  In the present invention configured as described above, since the cam portions are provided at predetermined distances along the axial direction of the drum, each of the valve bodies is arranged corresponding to the positions of the plurality of cam portions. It can be arranged along the direction. Further, since the cam portions are provided at positions shifted from each other with respect to the circumferential direction of the drum, it is possible to associate the driving of each valve element with the rotation angle of the drum. As a result, the drive control of the valve body according to the rotation angle of the drum can be realized.

  In the invention described above, the present invention is characterized in that a passage that forms a part of the flow path is provided in each of the valve bodies. In the present invention configured as described above, the valve body can be used for forming the flow path.

  Further, the present invention is characterized in that, in the above invention, one suction port is provided and a plurality of the discharge ports are provided. The present invention configured as described above can realize open / close control of a plurality of flow paths connected to a plurality of discharge ports.

  Further, the present invention is characterized in that in the above-mentioned invention, a detecting means for detecting a rotation angle of the drum is provided. The present invention configured as described above can realize the drive control of the valve body in accordance with the rotation angle of the drum with high accuracy.

  Further, the present invention is characterized in that, in the above invention, the detection means comprises a slit plate provided coaxially with the drum and a transmissive photosensor. In the present invention configured as above, the rotation of the slit plate accompanying the rotation of the drum can be detected by the photosensor. That is, the rotation angle of the drum can be reliably detected by the combination of the slit plate and the photo sensor.

  According to the present invention, the slide member is driven by the cam portion of the drum, and accordingly, the corresponding one of the valve bodies arranged in each of the plurality of flow paths is driven to correspond to the plurality of flow paths. Since the flow path is configured to be opened and closed, it is possible to perform opening / closing control of a plurality of flow paths that connect the suction port and the discharge port as the drum rotates. In addition, the number of parts is small, the structure is simple, and the manufacturing cost can be reduced as compared with the prior art. Furthermore, it is possible to reduce the size of the apparatus, and accordingly, it is possible to relax the restrictions imposed on the layout design as compared with the related art.

  The best mode for carrying out the valve device according to the present invention will be described below with reference to the drawings.

[Configuration of this embodiment]
FIG. 1 is a perspective view showing an embodiment of the valve device of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  As shown in FIGS. 1 and 2, the valve device according to the present embodiment is joined to the first case 1, the second case 2 joined to the first case 1, and the second case 2. A third case 3 and a frame 4 fixed to the third case 3 are provided.

  The frame 4 holds a stepping motor 5, a speed reduction mechanism 6 connected to the output shaft of the stepping motor 5, and a pinion gear 7 attached to the output shaft of the speed reduction mechanism 6. Furthermore, a rotatable drum 8, a gear 9 attached to the drum 8 and engaged with the pinion gear 7, a slit plate 10 provided coaxially with the drum 8 and rotating integrally with the drum 8, and the slit plate 10 The frame body 4 holds the photo sensor 11 disposed so as to be opposed to the slit formed in the frame 4.

  The slit plate 10 and the photo sensor 11 described above constitute detection means for detecting the rotation angle of the drum 8.

  3A and 3B are diagrams showing a first case provided in the present embodiment, wherein FIG. 3A is a front view, FIG. 3B is a side view, FIG. 3C is a rear view, and FIG. It is BB sectional drawing of.

  As shown in FIG. 3, the first case 1 described above includes, for example, one suction port 12 through which fluid is sucked, and a plurality of, for example, four discharge ports 13 that discharge the fluid sucked from the suction port 12. 14, 15, and 16 are provided. Four flow paths through which fluid is guided are formed between the suction port 12 and the discharge ports 13, 14, 15, and 16.

  As shown in FIG. 3 (d), the first case 1 has a passage 12a communicating with the suction port 12 and a passage 13a communicating with the corresponding ones of the discharge ports 13, 14, 15, and 16, respectively. , 14a, 15a, 16a.

  4A and 4B are diagrams showing a second case provided in the present embodiment, in which FIG. 4A is a front view, FIG. 4B is a rear view, and FIG. 4C is a cross-sectional view taken along a line CC in FIG. .

  As shown in FIG. 4, the second case 2 described above has passages 12b, 13b, 14b, 15b, 16b communicating with the corresponding ones of the passages 12a, 13a, 14a, 15a, 16a of the first case 1, respectively. Is formed. In particular, as shown in FIG. 4B, a passage 12b communicating with the suction port 12, and passages 13b, 14b, 15b, 16b capable of communicating with the discharge ports 13, 14, 15, 16 respectively. A common passage 17 that communicates with each other is formed.

  5A and 5B are views showing a valve body provided in the present embodiment, in which FIG. 5A is a side view, and FIG. 5B is a sectional view taken along line DD in FIG.

  As shown in FIG. 2 described above, for example, a valve body 18 that opens and closes the flow path including the common passage 17 and the passages 14a and 14b corresponding to the discharge port 14 is provided. As shown in FIG. The body 18 has a neck portion 18 c to which the O-ring 19 shown in FIG. 2 is locked connected to a valve head 18 a disposed in the passage 14 a of the first case 1 and a passage communicating with the common passage 17. 14 b and a passage 14 a that communicates with the passage 14 a communicating with the discharge port 14 according to the valve opening operation of the valve body 18. The passage 18b formed in the valve body 18 forms a part of the corresponding flow path.

  As shown in FIG. 2, when the valve body 18 is in the closed state, the O-ring 19 is held in a state of being pressed by the valve head 18 a of the valve body 18 and the end surface of the second case 2. Accordingly, the passage between the passage 18b formed in the valve body 18 by the O-ring 19 and the passage 14a communicating with the discharge port 14, that is, the flow path connecting the suction port 12 and the discharge port 14 is kept in a blocked state. It is.

  Further, as shown in FIG. 2, a slide member 21 into which the valve body 18 is press-fitted is slidably provided in the third case 3, and the slide member 21 is attached in a direction in which the valve body 18 closes the flow path. A biasing spring 22 is provided in the third case 3. That is, the valve body 18 is configured to be driven in the valve opening direction integrally with the sliding of the slide member 21 against the urging force of the spring 22.

  Between the end face of the first case 1 and the end face of the second case 2, a rubber seal member 23 is provided for sealing between the end faces. The end face of the second case 2 and the end face of the third case 3 are provided. Between the two, a rubber seal member 24 for sealing between the end faces is provided.

  In the above description, the valve body 18, the slide member 21, and the spring 22 provided corresponding to the discharge port 14 have been described, but the same valve as described above is also applied to each of the other discharge ports 13, 15, and 16. A combination of the body 18, the slide member 21, and the spring 22 is provided.

  6A and 6B are diagrams showing a drum provided in the present embodiment, in which FIG. 6A is a front view, and FIG. 6B is an enlarged view as viewed from the E direction of FIG.

  As shown in FIG. 6, the drum 8 described above includes four cam portions 8a, 8b, 8c, and 8d that drive corresponding ones of the four slide members 21, respectively. These cam portions 8a, 8b, 8c and 8d are provided at predetermined distances along the axial direction of the drum 8 as shown in FIG. b) As shown in the drawing, they are provided at positions shifted from each other in the circumferential direction of the drum 8. These four cam portions 8a, 8b, 8c, and 8d are arranged at positions that can be engaged with the corresponding ones of the slide members 21 provided in relation to the discharge ports 13, 14, 15, and 16, respectively. is there. As the drum 8 rotates, the cam portions 8a, 8b, 8c, and 8d engage with the corresponding slide members 21 so that the slide member 21 and the valve body 18 are integrated. To change the corresponding flow path from the closed state to the open state.

  As described above, a passage including the passage 12a, the passage 12b, the common passage 17, the passage 13b, the passage 18b of the valve element 18, and the passage 13a is formed between the suction port 12 and the discharge port 13. The path is controlled to open and close by driving a valve body 18 provided corresponding to the discharge port 13.

  Further, a passage including the passage 12a, the passage 12b, the common passage 17, the passage 14b, the passage 18b of the valve body 18, and the passage 14a is formed between the suction port 12 and the discharge port 14, and this passage is discharged. Opening and closing is controlled by driving a valve body 18 provided corresponding to the outlet 14.

  In addition, a passage including the passage 12a, the passage 12b, the common passage 17, the passage 15b, the passage 18b of the valve body 18, and the passage 15a is formed between the suction port 12 and the discharge port 15. Opening / closing is controlled by driving a valve body 18 provided corresponding to the outlet 15.

  Further, a passage including the passage 12a, the passage 12b, the common passage 17, the passage 16b, the passage 18b of the valve body 18 and the passage 16a is formed between the suction port 12 and the discharge port 16, and this passage is discharged. Opening and closing is controlled by driving a valve body 18 provided corresponding to the outlet 16.

  That is, in this embodiment, four flow paths are formed between the suction port 12 and the discharge ports 13, 14, 15, and 16, and four valve bodies 18 that respectively open and close these flow paths are provided. It is configured.

[Operation of this embodiment]
In this embodiment configured as described above, when the stepping motor 5 is driven, the pinion gear 7 rotates via the speed reduction mechanism 6. As the pinion gear 7 rotates, the gear 9 that engages with the pinion gear 7 rotates, and the drum 8 rotates together with the gear 9. The rotation angle of the drum 8 is detected by a combination of the slit plate 10 that rotates integrally with the drum 8 and the photosensor 11, and the detection signal is used for drive control of the stepping motor 5, that is, rotation control of the drum 8. It has become.

  As described above, the drum 8 rotates, and for example, the cam portion 8a of the drum 8 shown in FIG. 6B is engaged with the slide member 21 provided in association with the discharge port 13 shown in FIGS. When combined, the slide member 21 slides against the urging force of the spring 22. At this time, the valve body 18 moves integrally with the slide member 21, and the passage 13 b of the second case 2 and the passage 13 a of the first case 1 communicate with each other via the passage 18 b of the valve body 18. That is, a valve open state is formed. As a result, the suction port 12 and the discharge port 13 communicate with each other, the fluid sucked from the suction port 12 is guided to a flow path connecting the suction port 12 and the discharge port 13, and the guided fluid is discharged to the discharge port. 13 can be discharged.

  When the engagement between the cam portion 8a of the drum 8 and the slide member 21 provided in association with the discharge port 13 is released along with the further rotation of the drum 8, the slide member 21 is put on standby by the biasing force of the spring 22. Slide to return to position. Along with this, the valve body 18 moves, and the O-ring 19 is pinched by the urging force of the spring 22 between the valve head 18a of the valve body 18 and the end surface of the second case 2 to form a closed valve state. . As a result, the gap between the inlet 12 and the outlet 13 is blocked. Accordingly, the fluid sucked from the suction port 12 is prevented from being discharged from the discharge port 13.

  Similarly, when the cam portions 8b, 8c, 8d are engaged with corresponding ones of the slide members 21 provided in association with the discharge ports 14, 15, 16 as the drum 8 rotates, The slide member 21 and the valve body 18 provided in association with the slide member 21 move in the valve opening direction, and a valve open state is formed respectively. Thereby, the suction port 12 communicates with the corresponding one of the discharge ports 14, 15, 16, and the fluid guided from the suction port 12 is discharged from the corresponding one of the discharge ports 14, 15, 16. Can do. When the engagement between the cam portions 8b, 8c and 8d of the drum 8 and the corresponding slide member 21 provided in association with each of the discharge ports 14, 15 and 16 is released, the slide member 21 The valve body 18 provided in association with the slide member 21 moves in the valve closing direction, and the O-ring 19 forms a valve closing state. As a result, the fluid sucked from the suction port 12 is prevented from being discharged from the corresponding ones of the discharge ports 14, 15, 16.

[Effect of this embodiment]
According to the present embodiment, as described above, the opening / closing control of the four flow paths that connect the suction port 12 and the corresponding ones of the discharge ports 13, 14, 15, 16 is performed with the valve body accompanying the rotation of the drum 8. 18 drive. Moreover, since the drum 8 forms a common member for the four valve bodies 18, the number of parts is small, the structure is simple, and the manufacturing cost can be reduced. Furthermore, it is possible to reduce the size of the device, and in accordance with this, it is possible to relax restrictions on the layout design for a predetermined place where the valve device is disposed.

  In the present embodiment, the four cam portions 8a, 8b, 8c, and 8d are provided at predetermined distances along the axial direction of the drum 8, so that the four cam portions 8a, 8b, 8c, and 8d are provided. Each of the valve bodies 18 can be arranged along the axial direction of the drum 8 so as to correspond to the positions. Further, since the cam portions 8a, 8b, 8c, and 8d are provided at positions shifted from each other with respect to the circumferential direction of the drum 8, the driving of the four valve bodies 18 and the rotation angle of the drum 8 can be associated with each other. As a result, the drive control of the valve body 18 according to the rotation angle of the drum 8 can be realized, and a highly reliable valve device can be obtained.

  In addition, since each of the four valve bodies 18 is provided with a passage 18b that forms a part of the corresponding flow path, the valve body 18 can be used for forming the flow path, contributing to further miniaturization.

  Further, it is possible to realize opening / closing control of four flow paths connected to one suction port 12 and each of the four discharge ports 13, 14, 15, 16, and excellent guidance for the fluid sucked from the suction port 12. Performance can be secured.

  In addition, since a detecting means for detecting the rotation angle of the drum 8, for example, a detection means comprising a combination of the slit plate 10 and the photosensor 11 is provided, the rotation angle of the drum 8 can be reliably detected. This contributes to the realization of highly accurate drive control of the valve body 18 according to the above.

[Other Embodiments]
In the above embodiment, four sets of the valve body 18, the slide member 21, and the spring 22 are made to correspond to the four flow paths formed between the suction port 12 and the discharge ports 13, 14, 15, 16. Although a combination is provided, the present invention is not limited to such a configuration. When two or three channels, or more than five channels, are provided, a combination of the number of valve bodies 18, slide member 21, and spring 22 corresponding to each channel can be provided. That's fine.

  In the above description, one suction port 12 and four discharge ports 13, 14, 15, and 16 are provided. However, the present invention is not limited to such a configuration. A plurality of suction ports may be provided, or a single discharge port or a plurality other than four as in the present embodiment may be provided.

It is a perspective view which shows one Embodiment of the valve apparatus of this invention. It is AA sectional drawing of FIG. It is a figure which shows the 1st case with which this embodiment is equipped, (a) A figure is a front view, (b) A figure is a side view, (c) A figure is a rear view, (d) A figure is B- of (a) figure. It is B sectional drawing. It is a figure which shows the 2nd case with which this embodiment is equipped, (a) A figure is a front view, (b) A figure is a rear view, (c) A figure is CC sectional drawing of (a) figure. It is a figure which shows the valve body with which this embodiment is equipped, (a) A figure is a side view, (b) A figure is DD sectional drawing of (a) figure. It is a figure which shows the drum with which this embodiment is equipped, (a) A figure is a front view, (b) A figure is the enlarged view seen from the E direction of (a) figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st case 2 2nd case 3 3rd case 4 Frame 5 Stepping motor 6 Deceleration mechanism 7 Pinion gear 8 Drum 8a Cam part 8b Cam part 8c Cam part 8d Cam part 9 Gear 10 Slit plate (detection means)
11 Photosensor (detection means)
12 suction port 12a passage 12b passage 13 discharge port 13a passage 13b passage 14 discharge port 14a passage 14b passage 15 discharge port 15a passage 15b passage 16 discharge port 16a passage 16b passage 17 common passage 18 valve body 18a neck portion 18b neck portion 18b O-ring 21 Slide member 22 Spring 23 Seal member 24 Seal member

Claims (6)

A valve body that opens and closes a flow path that connects a suction port for sucking fluid and a discharge port for discharging the sucked fluid,
While having a plurality of the flow paths, and disposing the valve bodies in the plurality of flow paths,
A slide member for driving each of these valve bodies;
A drum having a cam portion for driving these slide members;
A valve device comprising a motor for rotating the drum. In the invention of claim 1,
A plurality of the cam portions of the drum are provided to correspond to the slide members,
A valve device characterized in that these cam portions are provided at predetermined distances along the axial direction of the drum and are shifted from each other with respect to the circumferential direction of the drum. In the invention according to claim 1 or 2,
A valve device characterized in that a passage forming a part of the flow path is provided in each of the valve bodies. In the invention according to any one of claims 1 to 3,
A valve device characterized in that one suction port is provided and a plurality of the discharge ports are provided. In the invention according to any one of claims 1 to 4,
A valve device comprising detection means for detecting a rotation angle of the drum. In the invention of claim 5,
The valve means characterized in that the detecting means comprises a slit plate provided coaxially with the drum and a transmissive photosensor.

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