JP4796452B2 - Valve body opening / closing device - Google Patents

Description

  The present invention relates to a valve body opening / closing device, and more particularly to a valve body opening / closing device that opens and closes a flow path by operating a valve body by driving a motor.

  2. Description of the Related Art Conventionally, a valve body opening / closing device that drives a valve body using a motor as a drive source and opens and closes a refrigerant flow path of a refrigerator or the like is known. For example, in Patent Document 1, a needle valve is attached to a screw member, and the screw member is rotated by a motor, whereby the screw member is moved back and forth in the axial direction to open and close an opening through which refrigerant flows out. A dynamic valve body opening / closing mechanism is described.

  Further, in Patent Document 2, when a disk valve provided with an opening is rotated by a motor and the opening of the disk valve coincides with any position of the outlet provided in the valve seat plate, An opening / closing mechanism for the valve body in which the matching outlet is opened is described.

JP 2003-148645 A JP 2004-293573 A

  However, in Patent Document 1, since the amount of movement of the screw member in the axial direction with respect to the amount of rotation of the motor must be accurately controlled, a high-precision male member is provided in the screw member and the cylindrical portion to which the screw member is screwed. A screw part and a female screw part are required, and there is a problem that the mass productivity is poor. Furthermore, since the amount of movement of the screw member in the axial direction per motor rotation is small, the number of rotations of the motor required to open and close the needle valve increases, resulting in not only low energy efficiency but also response to the opening and closing operation of the valve body. There is also a problem that is slow.

  In Patent Document 2, the valve body does not move directly with respect to the refrigerant outlet as in Patent Document 1, and the valve seat plate provided with the disk valve and the outlet is in surface contact. Therefore, there is a problem that the startability of the valve body opening / closing device is lowered by the frictional force due to these sliding.

  The problem to be solved by the present invention is that the valve body opening / closing mechanism does not require high-precision parts, has excellent response performance of the valve body opening / closing operation, and slides on the contact surface between the valve body and the fluid outlet. An object of the present invention is to provide a valve body direct-acting valve body opening / closing device in which dynamic friction does not occur.

In order to solve the above-described problems, the present invention is provided in at least one of an inflow portion into which a fluid can flow in, an outflow portion from which a fluid can flow out, and the inflow portion and the outflow portion. and opening portion, a valve body for opening and closing the opening, a drive mechanism operates the valve body switches the opening in an open state or a closed state, the motor and a driving source of the driving mechanism , The drive mechanism is a member that is rotationally driven by the motor, and has an upper cam member and a lower cam member that are integrally rotatable, and the spaced apart upper cam member A cam member formed with one cam groove which is a spiral groove of one rotation or less inclined between the cam surface and the cam surface of the lower cam member, and a cylindrical shape formed on the valve body The cam member can be rotated inside. A slider section which is loosely inserted in a state, formed in the valve body protrudes from the inner wall of the slider portion, the cam engagement portion of the one engaged in the cam groove, wherein by rotation of the cam member includes a detent portion to linear motion to restrict the rotation of the valve body, the said valve body, said cam cam engaging portion of the one engaged in the single cam groove in accordance with the rotation of the cam member The gist is to move linearly along an axis parallel to the rotation axis of the cam member by receiving a force moving along the surface.

In this case, as described in claim 2, the cam surface formed on the upper cam member moves the valve body in a direction in which the opening is closed via the cam engaging portion, It is desirable that the cam surface formed on the lower cam member moves the valve body in a direction in which the opening is opened via the cam engaging portion.

According to a third aspect of the present invention, the upper cam member, the lower cam member, and the rotor are supported by a common support shaft so as to be movable and rotatable in the direction of the rotation axis of the cam member. Is desirable.

Further, according to a fourth aspect of the present invention, the upper cam member is biased in the direction of the lower cam member by the rotor of the motor biased by the biasing member, and the valve body is The upper cam member urged in the direction of the cam member may be urged in the direction in which the opening is closed.

According to a fifth aspect of the present invention, the cam surface of the cam member has at least a cam engagement portion formed on the valve body in at least one of an open state and a closed state of the valve body. It is only necessary that the cam member is engaged at a position orthogonal to the rotation axis direction of the cam member.

And as described in Claim 6, the said opening part should just be provided in the said outflow part. In addition, as described in claim 7, it is preferable that the valve body is formed of an elastic body at a contact portion with the opening.

According to the valve body opening / closing device of the present invention , a cam member having a cam surface inclined in the direction of the rotation axis is rotated by using a motor as a drive source, whereby the cam surface is engaged via the cam engagement portion. The valve body receives a force that moves along the cam surface of the cam member, but the rotation of the valve body is restricted by the anti-rotation part, so the valve body operates only in parallel with the rotation axis of the cam member. Will be. Therefore, there is no sliding between the valve body and the fluid outflow opening, and there is no possibility that the starting performance of the valve body is reduced due to friction or the valve body is worn. In addition, since the slope shape of the cam surface can be freely set, the valve body can be opened and closed with a small amount of motor rotation, and the valve body opening and closing device having excellent response performance of the valve body opening and closing operation is obtained. it is possible.
Further, the cam engaging portion of the valve body is engaged with a cam groove between an upper cam member that moves the valve body to a closed state and a lower cam member that moves the valve body to an open state. If it does so, the assembly operation | work with both cam members and the cam engaging part of a valve body will become easy easily. Moreover, each cam member itself can be made into a simple shape that can be easily molded, and the manufacturing cost of parts can be reduced.

In addition, if the opening is provided in the outflow portion of the fluid as in the sixth aspect , the use of a more suitable valve body opening / closing device can be expected.

If the rotor is biased in the direction of the rotation center axis of the cam member and the valve body is biased to the open state via the cam member as in claim 4 , the torque of the motor and the biasing member Since the valve body is pressed against the opening by the biasing force, a more reliable closed state of the opening can be obtained.

Furthermore, as in claim 5 , if the cam engaging portion of the valve body is engaged at a position orthogonal to the rotational axis direction of the cam member in the open state or the closed state of the valve body, The urging force from the cam member can prevent the cam member from inadvertently rotating in the closing direction or the opening direction of the valve body.

And if the contact part with the fluid opening part of the said valve body is formed with the elastic body like Claim 7 , the surface roughness of the contact surface with a valve body and the fluid opening part of a valve body Even if the value is large, the operation of opening and closing the refrigerant flow path is surely performed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a valve element opening / closing device 1 according to an embodiment of the present invention, and FIG. 2 is an external perspective view thereof. In addition, the up-down direction in the following description shall show the up-down direction in FIG.

  As shown in these drawings, the valve body opening / closing device 1 of this embodiment includes a bottomed cylindrical main body case 2, a plate 4 attached to the main body case 2, and the plate 4 and the main body case. An inflow pipe 5 for allowing a fluid to flow into the fluid space 92 formed by 2 through the opening 3a, and an outflow pipe 6 for allowing the fluid that has flowed into the fluid space 92 to flow out through the opening 3b, respectively. It is attached to the plate 4 and disposed.

  In the fluid space 92, at least the valve body 12 that opens and closes the opening 3b of the outflow pipe 6, the drive mechanism 9 that operates the valve body 12 to switch the opening 3b to an open state or a closed state, A rotor 10 of a stepping motor (hereinafter simply referred to as a motor) 7 which is a drive source of the drive mechanism unit 9 is disposed.

  Each of these members and mechanisms will be described in more detail with reference to FIGS. 3 is an external perspective view showing the configuration inside the main body case 2, and FIG. 4 is an exploded perspective view of the components.

  The main body case 2 is formed by integrally forming a relatively large diameter large diameter cylindrical portion 2a and a relatively small diameter small diameter cylindrical portion 2b by press drawing of a metallic stainless material. A flange portion 2c is formed at the opening edge of the large-diameter cylindrical portion 2a, and the flange portion 2c and the stepped portion 4a of the plate 4 are fixed by TIG (tungsten inert gas) welding, whereby a fluid space 92 is formed. Is formed.

  In the main body case 2, one end of the support shaft 13 is fitted and supported in a recess 20 a formed in the inner bottom wall surface 20 of the main body case 2, and the other end is inserted into the center hole 3 c of the plate 4 to be welded or the like. It is fixed by.

  In the small-diameter cylindrical portion 2b of the main body case 2, the rotor 10 of the motor 7 is rotatably supported on the support shaft 13, and the large-diameter cylindrical portion 2a includes an upper cam member that constitutes the drive mechanism unit 9. 32 and the lower cam member 36 are supported.

  Further, in the rotor 10, an annular magnet (permanent magnet) 17 is supported on a shaft tube portion 16 that is loosely inserted into the support shaft 13 by holding portions 16 a that are provided around both ends of the outer periphery of the shaft tube portion 16. It is provided integrally in a state.

  Corresponding to the rotor 10, two layers of stators 72 a and 72 a in which the drive coils 14 and 14 are wound around the coil bobbins 15 and 15 are disposed on the outer peripheral surface of the small diameter cylindrical portion 2 b of the main body case 2. A stator portion 72 is formed. The stator portion 72 is fixed to the stator case 8 so as to surround the outer peripheral surface thereof, and is attached to the outside of the main body case 2.

  The drive coils 14 and 14 of the stators 72a and 72a are connected to predetermined positions on the control board 74 at the tip portions of the terminals. The control board 74 is electrically connected to the external power supply terminal 76. ing.

  Therefore, the motor 7 generates a magnetic attraction force or a magnetic repulsion force with the magnet 17 of the rotor 10 due to a magnetic field generated by energizing the drive coils 14 and 14 of the stators 72a and 72a. 10 is configured to be rotationally driven around the support shaft 13.

  Furthermore, between the rotor 10 and the inner bottom wall surface 20 of the main body case 2, a biasing member 22 that biases the rotor 10 in the direction of the plate 4 is inserted through the support shaft 13 and attached. In this urging member 22, three plate springs 22 b are attached to a base plate 22 a formed with an insertion hole through which the support shaft 13 is inserted, and the tip of the plate spring 22 a is the inner bottom wall surface 20 of the main body case 2. Therefore, the rotor 10 loosely inserted into the support shaft 13 is always urged toward the plate 4 side.

  On the other hand, an upper cam member 32 and a lower cam member 36, which are components of the drive mechanism 9, are disposed on the large-diameter cylindrical portion 2 a of the main body case 2. External perspective views of the upper cam member 32 and the lower cam member 36 are shown in FIGS.

  The upper cam member 32, whose details are shown in FIGS. 5 and 7, has a relatively large-diameter coupling portion 33 and three coupling protrusions formed on the lower end surface of the shaft tube portion 16 of the rotor 10. Three coupling grooves 33a to be engaged are provided at equal intervals on the circumference.

  Moreover, the upper cam surface 34a formed in a spiral shape, a pressing surface 34b and a bottom surface 34c orthogonal to the direction of the support shaft 13 are formed on the lower end surface of the relatively small diameter main body 34. Further, the main body portion 34 is formed with an engagement hole 35 into which the lower cam member 32 is loosely inserted, and a D cut convex portion 35a is formed protruding from the inner wall surface.

  The lower cam member 36, whose details are shown in FIGS. 6 and 7, has a cylindrical portion 37 formed to have an outer diameter that can be loosely inserted into the through hole 35 of the upper cam member 32, and a larger diameter than the cylindrical portion 37. A shaft hole 39 into which the support shaft 13 is loosely inserted is formed at the center.

  On the boundary line between the cylindrical portion 37 and the base portion 38, there are a lower cam surface 38a formed at the same spiral angle as the upper cam surface 34a, a receiving surface 38b orthogonal to the direction of the support shaft 13, and a height holding projection 38c. Is formed. The cylindrical portion 37 is formed with a D-cut concave portion 37a in which a part of the outer peripheral surface is cut into a flat surface.

  As shown in FIG. 7, the upper cam member 32 and the lower cam member 36 align the rotational direction positions of the D-cut convex portion 35 a and the D-cut concave portion 37 a, and the cylindrical portion 37 of the lower cam member 36 has the upper cam member 32. When the upper cam member 32 receives rotational power from the rotor 10 due to the engagement of the respective D-cut portions, the upper cam member 32 and the lower cam member 36 are It will rotate together. As for the axial direction, the height holding projection 38c of the lower cam member 36 is brought into contact with the bottom surface 34c of the upper cam member 32, whereby the axial position of the upper cam member 32 is determined.

  At this time, the upper cam surface 34a of the upper cam member 32 and the lower cam surface 38a of the lower cam member 36 are positioned at a predetermined interval without contacting each other. Further, the pressing surface 34b of the upper cam member 32 and the receiving surface 38b of the lower cam member 36 are positioned at the same interval without contacting each other. That is, when the upper cam member 32 and the lower cam member 36 are engaged, as shown in FIG. 1, a substantially spiral cam groove 42 having a constant width is formed.

  Next, the configuration and operation of the valve body 12 engaged with the upper cam member 32 and the lower cam member 36 will be described. 8 is an external perspective view of the valve body 12, and FIG. 9 is a view showing the opening 3b in an open state.

  As shown in FIG. 8, the valve body 12 engaged with the upper cam member 32 and the lower cam member 36 has a slider portion 50 which is a cylindrical member into which the main body portion 34 of the upper cam member 32 can be loosely inserted. A cam engaging portion 52 that protrudes from the inner wall and engages with the cam groove 42 formed by the upper cam member 32 and the lower cam member 36 is formed. The height of the cam engaging portion 52 in the direction of the support shaft 13 is formed to be smaller than the interval between the cam grooves 42, and is formed to have some play when both are engaged.

  On the other hand, a pad holding portion 54 that is a block-like member having a step is formed to protrude from the outer wall surface of the slider portion 50. Moreover, the pad 56 which closes the opening part 3b shown in FIG. 9 is a product made from urethane rubber which is an elastic body, and the valve body 12 is comprised by inserting the pad holding | maintenance part 54 in the attachment hole. In addition, since the stopper 54a is provided in the front-end | tip of the pad holding | maintenance part 54, the pad 56 does not fall out carelessly. Further, the pad abutting portion 56a of the pad 56 shown in the figure is pressed against the valve seat 40, and the opening 3b which is a fluid outlet is closed.

  On the other hand, the valve seat 40 shown in FIG. 4 is a part that is integrally manufactured by press molding. The valve seat 40 is fitted into the opening 3b at the approximate center of the base 41 so that the fluid flows out. A burring hole 41a serving as a passage is formed. Further, anti-rotation portions 41 b and 41 b that prevent the valve body 12 from rotating are formed by being folded vertically from the base 41.

  Further, positioning holes 41 c and 41 c are formed in the base 41 in the vicinity of the rotation preventing portions 41 b and 41 b, and these positioning holes 41 c and 41 c are formed on the two positioning projections 4 a and 4 a provided on the plate 4. When fitted, the valve seat 40 is positioned and secured to the plate 4.

  As shown in FIG. 4, the drive mechanism section 9 having such a configuration is pivotally supported by the support shaft 13 in order of the rotor 10, the upper cam member 32, and the lower cam member 36, and the upper cam member and the lower cam The valve body 12 is engaged between the cam members.

  That is, the upper cam member 32 is loosely inserted into the support shaft 13 with the coupling portion 33 facing upward, and engages with the shaft tube portion 16 of the rotor 10 via the coupling portion 33. After the main body portion 34 of the upper cam member 32 is loosely inserted into the slider portion 50 of the valve body 12, the lower cam member 36 is loosely inserted into the support shaft 13, and the upper cam member is placed with the base portion 38 downward. 32 is engaged. As a result, the cam engaging portion 52 of the valve body 12 is engaged with the cam groove 42 formed by the upper cam member 32 and the lower cam member 36.

  Further, the pad holding portion 54 and the pad 56 of the valve body 12 engaged in this manner are incorporated so as to be positioned between the rotation preventing portions 41 b and 41 b of the valve seat 40 fixed to the plate 4. .

  In the valve body opening / closing device 1 configured as described above, when the pad 56 of the valve body 12 is in contact with the opening 3b and the flow path is closed (the state shown in FIG. 1), the rotor 10 is moved to the motor. When rotated counterclockwise when viewed from the 7 side, the upper cam member 32 and the lower cam member 36 are also rotated in conjunction with the rotor 10, and the valve engaged with the cam groove 42 via the cam engaging portion 52. The body 12 receives a force that moves in the upward spiral direction along the cam surface 38 a of the lower cam member 36.

  At that time, the valve body 12 is placed so that the pad holding portion 54 is positioned between the rotation-preventing portions 41b and 41b of the valve seat 40, so that the operation of the lower cam member 36 in the rotational circumferential direction is restricted. . Therefore, as shown in FIG. 9, the valve body 12 moves in the upward direction away from the opening 3 b in parallel with the support shaft 13 that is the rotation shaft, and opens the opening 3 b that is the fluid outlet.

  On the other hand, when the opening 3b is changed from the open state to the closed state, when the rotor 10 is rotated reversely to the above, the upper cam member 32 and the lower cam member 36 are also rotated in conjunction with the rotation of the rotor 10. Then, the valve body 12 engaged with the cam groove 42 via the cam engagement portion 52 receives a force that moves in the downward spiral direction along the cam surface 34a of the upper cam member 32. Become.

  Since the operation of the valve body 12 in the rotational direction is regulated by the rotation preventing portions 41b and 41b of the valve seat 40, the valve body 12 moves in a downward direction to close the opening 3b in parallel with the support shaft 13. The pad 56 is pressed against the valve seat 40, and the opening 3b is closed.

  That is, in the valve body opening / closing device 1, the valve body 12 moves up and down in parallel with the support shaft 13 with respect to the opening 3b by the axial displacement of the cam groove 42 due to the rotation of the upper cam member 32 and the lower cam member 36. By doing so, the valve body direct-acting opening / closing operation in which the pad 56 opens and closes the opening 3b that is the fluid outlet is repeated.

  As described above, in the valve body opening / closing device 1 according to the embodiment of the present invention, the upper cam surface 34a and the lower cam surface 38a of the lower cam member 36 are engaged with the upper cam member 32 formed in a spiral shape. The valve body 12 receives a force that moves along the spiral direction using the motor 7 as a drive source. However, the operation of the valve body 12 in the rotational direction is restricted by the anti-rotation portions 41b and 41b of the valve seat 40. 12 operates in parallel with the support shaft 13.

  Therefore, there is no sliding between the valve body 12 and the valve seat 40, and there is no possibility that the starting performance of the valve body 12 is reduced due to friction or the valve body is worn. Further, the upper cam member 32 and the lower cam member 36 are excellent in mass production because they can be manufactured integrally by molding, and the spiral shape can be freely set. It is also possible to reliably open and close the flow path with the motor torque.

  In the case of the present embodiment, the upper cam surface 34a of the upper cam member 32 and the lower cam surface 38a of the lower cam member 36 have a helical length of 360 degrees or less, so that the amount of rotation of the rotor 10 is one rotation. The valve body 12 can be opened and closed with the pressure being kept below.

  That is, since the opening / closing operation of the flow path can be performed by reducing the rotation amount of the motor, not only the energy efficiency is good, but also the responsiveness of the opening / closing operation in the opening 3b of the valve body 12 is excellent.

  Further, as described above, a biasing member 22 that biases the rotor 10 toward the plate 4 is attached between the rotor 10 and the inner bottom wall surface 20 of the main body case 2. Via the cam member 32 and the lower cam member 36, the valve body 12 is always urged toward the plate 4 side. When the opening 3b is changed from the closed state to the open state using this, the valve body 12 is preferably in contact with the valve seat 40 at a midway position of the cam groove 42.

  That is, after the valve body 12 comes into contact with the valve seat 40, the rotor 10 further rotates and the valve body 12 is further pushed down against the urging force of the urging member 22. Then, the valve body 12 is pressed against the valve seat 40 by the urging force of the urging member 22, and the opening 3b can be closed more reliably.

  In the present embodiment, the cam member that drives the valve body 12 by receiving the rotational motion of the rotor 10 is divided into two parts, an upper cam member 32 and a lower cam member 36. Thereby, compared with the case where a cam member is made into one component, the operation | work which incorporates the cam engagement part 52 of the valve body 12 in the cam groove 42 which a cam member forms becomes easy. Further, the upper and lower cam members can each have a simple shape that can be easily molded.

  Furthermore, when the opening 3b is in the closed state, the opening 3b must be pressed with a stronger force in order to prevent fluid leakage and to close the flow path reliably. Temporarily, the cam engagement portion 52 is pressed by the cam surface 34a of the upper cam member 32, that is, the inclined surface, and the power supply of the motor 7 is stopped in a state where the pad 56 is pressed against the opening 3b. If the detent torque is used to maintain the closed state of the opening 3 b, the cam surface 34 a and the cam engaging portion 52 are provided if the cam surface 34 a is inclined at an angle greater than the friction angle with the cam engaging portion 52. A slip occurs between the upper cam member 32 and the lower cam member 36 against the detent torque of the motor 7, and the valve cannot be kept closed.

  On the other hand, in this embodiment, in the closed state of the opening 3b, the pressing surface 34b orthogonal to the rotation axis direction presses the cam engagement portion 52 in the direction of the support shaft 13. Therefore, even if fluid pressure that causes the valve body 12 to move in the opening direction is received, the cam member does not rotate in the opening direction, and the valve body 12 is reliably locked in the closed position with a small detent torque. be able to.

  In addition, the pad 56 is an elastic body formed of urethane rubber, and is elastically deformed to be in close contact with the opening 3b, so that fluid leakage in the opening 3b can be reliably prevented.

  Therefore, unlike the prior art, it is not necessary to reduce the surface roughness by polishing the valve body and its abutting portion, and even if the surface roughness of the valve seat 40 against which the pad 56 is pressed is large, the fluid passage can be formed. It can be securely closed.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, the valve body opening / closing device 1 according to the present embodiment can be suitably used when it is attached and fixed to the inside of a refrigerator or the like by a mounting plate 99 to control opening / closing of a refrigerant flow path such as isobutane or chlorofluorocarbon. The technical idea of the present invention can also be applied to an opening / closing valve that controls opening / closing of other liquids and gases.

  Moreover, although the said embodiment demonstrated that the pad 56 with which the valve body 12 was equipped was made from urethane rubber, if it has elasticity and can seal the opening part 3b reliably, it will be restricted to it is not.

  Further, the valve body 12 that opens and closes the flow path is provided only at the opening 3b that is the fluid outlet, but it may be provided at the fluid inlet or at both the outlet and the inlet. Further, the present invention can be applied to a valve body opening / closing device having a plurality of outlets and inlets.

It is sectional drawing of the valve body opening / closing apparatus which concerns on one embodiment of this invention. It is an external appearance perspective view of the valve body opening / closing apparatus shown in FIG. It is the external appearance perspective view which showed the structure in the main body case of a valve body opening / closing apparatus. It is a disassembled perspective view of the component in the main body case shown in FIG. It is an external appearance perspective view of the upper cam member which is a component of a drive mechanism part. It is an external appearance perspective view of the lower cam member which is a component of a drive mechanism part. It is an external appearance perspective view for demonstrating engagement of an upper cam member and a lower cam member. It is an external appearance perspective view of the valve body which opens and closes the opening part which is an outflow port of a fluid. It is sectional drawing of the state by which the opening part which is an outflow port of a fluid was open | released.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve body opening / closing apparatus 4 Plate 5 Inflow pipe 6 Outflow pipe 7 Motor 9 Drive mechanism part 10 Rotor 12 Valve body 13 Support shaft 13
32 Upper cam member 34a Upper cam surface 36 Lower cam member 38a Lower cam surface 41b, 41b Non-rotating portion 52 Cam engaging portion 56 Pad

Claims (7)

An inflow portion into which fluid can flow, an outflow portion from which fluid can flow out, an opening provided in at least one of the inflow portion and the outflow portion, a valve body for opening and closing the opening, and the valve in the valve body closing device comprising a drive mechanism for switching the opening in an open state or a closed state by operating the body, and a motor as a driving source of the driving mechanism, and
The drive mechanism is
A member that is rotationally driven by the motor, and has an upper cam member and a lower cam member that can rotate together, and rotates between the cam surface of the upper cam member and the cam surface of the lower cam member that are separated from each other. A cam member formed with one cam groove that is a spiral groove of one rotation or less inclined in the axial direction ;
A cylindrical portion formed on the valve body, the slider portion loosely inserted inside the cam member in a rotatable state;
One cam engagement portion that protrudes from the inner wall of the slider portion and is formed on the valve body and engaged with the cam groove;
A rotation preventing part that regulates and directly moves the valve body by the rotational drive of the cam member , and
The valve body receives the force that the one cam engaging portion engaged with the one cam groove moves along the cam surface with the rotation of the cam member, thereby rotating the rotation shaft of the cam member. Valve body opening and closing device characterized by linearly moving along an axis parallel to the valve body. The cam surface formed on the upper cam member moves the valve body in a direction in which the opening is closed via the cam engaging portion, and the cam surface formed on the lower cam member is The valve body opening / closing device according to claim 1, wherein the valve body is moved in a direction in which the opening is opened via a cam engagement portion. The valve according to claim 2, wherein the upper cam member, the lower cam member, and the rotor are supported so as to be movable and rotatable in a direction of a rotation axis of the cam member by a common support shaft. Body opening and closing device. The upper cam member is urged in the direction of the lower cam member by the rotor of the motor urged by the urging member, and the valve body is urged in the direction of the lower cam member. The valve body opening and closing device according to claim 3, wherein the opening is biased by a member in a direction in which the opening is closed. The cam surface of the cam member is at a position where at least a cam engagement portion formed on the valve body is orthogonal to a rotation axis direction of the cam member in at least one of an open state and a closed state of the opening portion by the valve body. The valve body opening / closing device according to any one of claims 1 to 4, wherein the valve body opening / closing device is engaged. The said opening part is provided in the said outflow part, The valve body opening / closing apparatus as described in any one of Claims 1-5 characterized by the above-mentioned. The valve body opening / closing device according to any one of claims 1 to 6, wherein the valve body is formed of an elastic body at a contact portion with the opening.

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