WO2022085569A1 - Flow channel area control valve for fuel tank - Google Patents

Abstract

Provided is a flow channel area control valve for a fuel tank, the flow channel area control valve being capable of controlling the flow channel area of an opening in a plurality of stages. This flow channel area control valve 10 for a fuel tank comprises: a housing 11 which is provided with a first space R1 that communicates with the inside of the fuel tank and a second space R2 that communicates with the outside of the fuel tank, a partition wall 22 being interposed between the first space R1 and the second space R2, and openings 23, 24 that communicate the first space R1 with the second space R2 being provided in the partition wall 22; needle valves 80, 81 which are disposed on the second space R2 side and have valve heads 90, 91 having a thickness that changes in a plurality of steps such that the valve heads 90, 91 can be inserted into and removed from the openings 23, 24; and a drive unit which moves the needle valves 80, 81 and changes the insertion position of the valve heads 90, 91 in relation to the openings 23, 24.

Description

Flow path area control valve for fuel tank

The present invention relates to a flow path area control valve for a fuel tank that can control the flow path area of an opening.

Various valve devices such as valve pressure control valves and cut valves are attached to the fuel tank. These valve devices include a housing having a partition wall forming an opening and a valve body that is in contact with and detached from the opening. Further, in such a valve device, it is desired to control the flow path area of the opening.

For example, in Patent Document 1 below, a valve accommodating cylinder having an L-shaped passage formed inside and a fluid pressure slidably supported in the valve accommodating cylinder and applied to the upstream side of the flow path in the valve accommodating cylinder. A two-stage switching valve is described that includes a valve body that receives the valve body and a spring means that urges the valve body toward the upstream direction of the flow path. The valve body has a small diameter cylinder having a ventilation hole, a tapered wall portion extending in a substantially conical shape from the outer circumference of the small diameter cylinder toward the downstream side, and extending diagonally upward from the outer circumference of the small diameter cylinder toward the upstream side. It has a plurality of legs and an upstream guide connected to the plurality of legs.

When the fluid pressure on the upstream side of the valve accommodating cylinder rises, the valve body moves to the downstream side against the spring force of the spring means, and the downstream end of the valve body becomes an L-shaped flow path. Sit on the inner ring seat. As a result, the fluid flowing in from the tank passes only in the small diameter cylinder and flows to the canister side (see the left column of FIG. 3 of Patent Document 1).

On the other hand, when the fluid pressure on the upstream side of the valve accommodating cylinder drops, the valve body moves to the upstream side due to the spring force of the spring means, and the downstream end of the valve body separates from the ring sheet. As a result, the fluid passes through the small-diameter cylinder, passes through the gaps between the plurality of legs, and flows to the canister side (see the right column of FIG. 3 of Patent Document 1).

As described above, in the two-stage switching valve of Patent Document 1, the flow path area in the L-shaped passage is small when moving to the downstream side of the valve body, and the L-shaped passage is used when moving to the upstream side of the valve body. The area of the flow path inside becomes large, and the area of the flow path in the L-shaped passage changes as the valve body moves.

Japanese Unexamined Patent Publication No. 2016-31094

In the two-stage switching valve of Patent Document 1, the flow path area in the L-shaped passage is switched depending on the shape of the valve body itself, but only two steps can be switched between the case where the flow path area is small and the case where the flow path area is large. Can not.

Therefore, an object of the present invention is to provide a flow path area control valve for a fuel tank, which can control the flow path area of the opening in a plurality of stages.

In order to achieve the above object, the flow path area control valve for the fuel tank according to the present invention has a first space communicating with the inside of the fuel tank and a second space communicating with the outside of the fuel tank through a partition wall. The partition wall is provided with an opening for communicating the first space and the second space. The housing is arranged on the second space side, and the thickness varies in a plurality of stages. It is characterized by having a needle valve having a valve head to be inserted and removed from the portion, and a driving portion for moving the needle valve to change the insertion position of the valve head with respect to the opening.

According to the present invention, the insertion position of the valve head with respect to the opening can be changed by moving the needle valve in the drive unit, so that the flow path area of the opening depends on the number of steps on the outer periphery of the valve head. The flow path area of the opening can be controlled in a plurality of steps.

It is an exploded perspective view which shows one Embodiment of the flow path area control valve for a fuel tank which concerns on this invention. It is an exploded perspective view of the drive part constituting the same flow path area control valve. FIG. 3 is a cross-sectional perspective view showing a part of the flow path area control valve as a cross section. It is a perspective view of the same flow path area control valve in a state where a rotating body, a needle bracket and the like are attached to a bracket. It is a perspective view of the frame constituting the housing in the same flow path area control valve. It is a perspective view of the same flow path area control valve in a state where a cover is removed from a window part of a frame constituting a housing. It is a perspective view of the same flow path area control valve in a state where a cover is attached to the window part of the frame constituting a housing. 9 is an enlarged cross-sectional view of a main part corresponding to the operation of the drive part of FIG. 9A in the same flow path area control valve. The drive unit in the flow path area control valve is shown, (A) is an enlarged perspective view showing the first operating state of the driving unit, and (B) is an enlarged perspective view showing the second operating state of the driving unit. be. (A) is an enlarged perspective view showing a third operating state of the drive unit, and (B) is an enlarged perspective view showing a fourth operating state of the drive unit. (A) is an enlarged perspective view showing a fifth operating state of the drive unit, and (B) is an enlarged perspective view showing a sixth operating state of the drive unit. 9 is an enlarged cross-sectional view of a main part corresponding to the operation of the drive part of FIG. 9B in the same flow path area control valve. FIG. 3 is an enlarged cross-sectional view of a main part corresponding to the operation of the drive part of FIG. 10A in the same flow path area control valve. FIG. 3 is an enlarged cross-sectional view of a main part corresponding to the operation of the drive part of FIG. 10B in the same flow path area control valve. 11 is an enlarged cross-sectional view of a main part corresponding to the operation of the drive part of FIG. 11A in the same flow path area control valve. 11 is an enlarged cross-sectional view of a main part corresponding to the operation of the drive part of FIG. 11B in the same flow path area control valve.

(One Embodiment of the flow path area control valve for a fuel tank)
Hereinafter, an embodiment of the flow path area control valve for the fuel tank according to the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, the flow path area control valve 10 for the fuel tank (hereinafter, also simply referred to as “control valve 10”) in this embodiment includes a housing 11 having a pair of openings 23 and 24. A pair of needle valves 80, 81 having valve heads 90, 91 to be inserted and removed from the openings 23, 24, and a drive unit (rotating body 150 having a cam surface 160 and a cam protrusion 130) for moving the needle valves 80, 81. It has a needle bracket 100) and.

As shown in FIG. 1, the housing 11 in this embodiment has a long box-shaped body 20, a long tubular frame 40 attached to an upper opening of the body 20, and a body 20. It has a partition wall 50 sandwiched between the frames 40, a lid 60 mounted on the lower opening of the body 20, and a bracket 70 mounted on the upper opening of the frame 40. A first chamber R1 communicating with the inside of the fuel tank (not shown) is formed between the body 20 and the lid 60, and a second space R2 communicating with the outside of the fuel tank between the body 20 and the partition wall 50 is formed. Is formed (see FIG. 3). Further, a third space R2 is also formed between the partition wall 50 and the bracket 70 (see FIG. 3).

As shown in FIG. 1, the body 20 has an elongated tubular peripheral wall 21 extending in one direction, consisting of a pair of long sides arranged parallel to each other and a pair of short sides orthogonal to the long sides. ing. A partition wall 22 having a substantially elongated plate is arranged inside the peripheral wall 21 at a predetermined position in the height direction of the peripheral wall 21.

A circular first opening 23 is formed on one end side in the longitudinal direction of the partition wall 22, and a circular second opening 24 is formed on the other end side in the longitudinal direction. A circular third opening 25 is formed between the openings 23 and 24 (see FIG. 3). The valve heads 90 and 91 of the needle valves 80 and 81 are inserted and removed from the first opening 23 and the second opening 24. Further, as shown in FIG. 16, the first openings 23 and 24 extend from one end on the first chamber R1 side toward the second chamber R2 side along the thickness direction of the partition wall 22 with a constant inner diameter. However, the inner peripheral edge portion on the second chamber R2 side forms the sealing portions 23a and 24a inclined so as to gradually increase in diameter toward the second chamber R2 side. The other end of the partition wall 22 in the longitudinal direction is connected to the inner circumference of the peripheral wall 21 via a recess 22a having a predetermined depth. Further, the inner diameter of the first opening 23 is formed to be larger than the inner diameter of the second opening 24. Further, the inner diameter of the third opening 25 is formed to be larger than the inner diameter of the first opening 23.

The opening into which the valve head of the needle valve is inserted / removed is not limited to a circular shape, but is, for example, a triangular shape, a polygonal shape such as a quadrangle, a pentagon, a hexagon, an elliptical shape, an oval shape, a semicircular shape, and the like. May be an irregularly shaped hole or the like in which the above are appropriately combined. Further, the number of the openings may be one or three or more.

Further, the flange portions 26 and 27 project from the outer peripheral edges of the upper opening and the lower opening of the peripheral wall 21, respectively. Further, as shown in FIG. 3, a through port 29a is formed on the other end side in the longitudinal direction of the peripheral wall 21, and a connecting pipe 29 is projected from the front peripheral edge of the through port 29a. A pipe (not shown) connected to a canister, a filler tube, or the like arranged outside the fuel tank is connected to the connection pipe 29 so as to communicate with the outside of the fuel tank.

Further, from the outer periphery of the first opening 23 and the second opening 24 on the front side (the side facing the frame 40) of the partition wall 22, needle valve support portions 30 and 30 having a substantially cylindrical shape are formed. It is projected (see Fig. 1). On the inner circumference of each needle valve support portion 30, a guide portion 31 provided with a predetermined gap is provided at a position facing the circumferential direction. On the other hand, as shown in FIG. 8, a valve support portion 32 having an annular shape is projected from the outer periphery of the third opening 25 on the back side (the side facing the lid 60) of the partition wall 22. ..

As shown in FIG. 5, the frame 40 is long in one direction and consists of a pair of long sides arranged parallel to each other and a pair of short sides orthogonal to each other so as to fit the peripheral wall 21 of the body 20. It has an elongated tubular peripheral wall 41. A window portion 41a having a long hole shape is formed on one long side of the peripheral wall 41. As shown in FIGS. 6 and 7, a cover 42 is detachably attached to the window portion 41a. The cover 42 has a substantially elongated plate shape, and a pair of mounting claws 42a, 42a extend perpendicularly to the surface direction of the cover 42 from the back peripheral edges at both ends in the longitudinal direction (see FIG. 6). ). By engaging these mounting claws 42a and 42a inside the upper peripheral edge portion of the window portion 41a, the cover 42 is mounted on the window portion 41a (see FIG. 7).

Further, on each of the pair of short sides of the peripheral wall 41, locking claws 41b that can be bent via a U-shaped slit are formed. Further, a flange portion 43 having a shape suitable for the flange portion 26 of the body 20 projects from the outer peripheral edge portion of the peripheral wall 41 on the body 20 side. Further, as shown in FIGS. 3 and 8, the bottom wall 44 is arranged inside the peripheral wall 41 and at a position closer to the body 20. Further, as shown in FIG. 5, needle bracket insertion portions 45, 45 having a substantially square hole shape are formed at both ends in the longitudinal direction of the bottom wall 44, and between these insertion portions 45, 45. , A rotating body receiving insertion portion 46 having a substantially square hole shape is formed.

The partition wall 50 is made of an elastic material such as rubber or rubber, and has a shape that extends long in one direction so as to fit a long box-shaped substantially body 20 and a long tubular frame 40. It has a made main body 51. A flange portion 52 projects from the outer peripheral edge portion of the main body 51. Further, recesses 53, 53 which are both ends in the longitudinal direction of the main body 51 and which are open at the upper side and recessed at the lower side are formed from the ceiling surface thereof. A needle valve locking hole 55 having a keyhole shape is formed in the bottom portion 54 of each recess 53. In addition, each portion constituting the partition wall 50 is integrally formed.

Then, the flange portion 52 of the partition wall 50 is placed on the flange portion 26 of the body 20, and after being sandwiched between the flange portions 43 of the frame 40, the flange portions 26 and the flange portions 43 are welded to each other with an adhesive or the like. By fixing, the frame 40 is attached to the upper opening of the body 20 via the partition wall 50 in a state where the partition wall 50 is sandwiched between the body 20 and the frame 40. As a result, the partition wall 50 is arranged at a position facing the partition wall 22, and the partition wall 50 is surrounded by the peripheral wall 21 and the partition wall 22 of the body 20, so that the second space R2 is defined. It has become.

The lid 60 has a main body 61 having a substantially long plate shape that extends long in one direction so as to fit into the long box-shaped frame 40. A through port 62a is formed at a position closer to one end in the longitudinal direction of the main body 61, and a connecting pipe 62 is projected from the front peripheral edge of the through port 62a. A pipe (not shown) communicating with the inside of the fuel tank is connected to the connection pipe 62 so as to communicate with the inside of the fuel tank. Further, a cylindrical valve support portion 63 is projected from a position on the back surface side (inner surface side) of the main body 61, which is displaced with respect to the through port 62a.

Then, the peripheral portion 61a of the main body 61 of the lid 60 is brought into contact with the flange portion 27 of the body 20 and both portions are fixed to each other by welding, an adhesive or the like, so that the lid 60 is placed in the lower opening of the body 20. It will be installed. As a result, the first space R1 that is surrounded by the lid 60, the peripheral wall 21 of the body 20, and the partition wall 22 and communicates with the inside of the fuel tank is defined.

Further, as shown in FIG. 3, a valve 65 is vertically arranged in the first space R1. The valve 65 has a cylindrical shape with a ceiling plate arranged above and an opening below. The upper portion of the valve 65 is inserted into the valve support portion 32 of the body 20, and the valve support portion 63 is inserted into the inner circumference of the lower portion to be guided up and down. Further, a valve urging spring 66 is interposed between the valve 65 and the main body 61, and the valve 65 is urged toward the third opening 25. As a result, the valve 65 comes into contact with the back peripheral edge of the third opening 25, and the third opening 25 is always closed. Then, when the pressure on the second chamber R2 side rises and overcomes the urging force of the valve urging spring 66, the valve 65 opens from the back peripheral edge of the third opening 25, and the gas on the second space R2 side becomes the second. It is discharged to the 1 space R1 side.

The bracket 70 is connected to a box-shaped drive means accommodating portion 71 having an open upper portion, a lid 72 mounted on the upper opening portion of the drive means accommodating portion 71, and a lower side of the drive means accommodating portion 71. It has a frame connecting portion 73 provided. A drive means 77 (see FIG. 3) such as a motor for rotating the rotating body 150 is housed in the drive means accommodating portion 71. Further, on the side wall of the drive means accommodating portion 71, an insertion hole 71a into which a plug (not shown) for supplying electricity to the drive means 77 is inserted is formed.

The frame connecting portion 73 has a shape that extends long in one direction so as to fit the upper opening of the peripheral wall 41 of the frame 40, and a pair of side walls 74 and 74 are provided at both ends in the longitudinal direction thereof. ing. A locking hole 74a is formed in each side wall 74. Further, as shown in FIG. 3, a pair of guide ridges 75a and 75a extend along the height direction from the inner surface of the back wall 75 of the frame connecting portion 73. Further, a rotating body support portion 76 for rotationally supporting the rotating body 150 is provided from the center position in the longitudinal direction on the bottom side of the back wall 75. Further, as shown in FIG. 4, spring support walls 78 and 78 are vertically installed between the pair of side walls 74 and 74 of the frame connecting portion 73. The spring support wall 78 supports the other end (upper end) of the needle bracket urging spring S1.

Then, the frame connecting portion 73 is inserted from the upper opening of the peripheral wall 41 of the frame 40, and each locking claw 41b on the frame side is locked in each locking hole 74a, whereby the peripheral wall of the frame 40 is engaged. The bracket 70 is attached to the upper opening of 41. As a result, a third space R2 is formed between the partition wall 50 and the bracket 70 (see FIG. 3).

The shape and structure of the housing described above are not particularly limited as long as the first space and the second space are provided via the partition wall.

Next, the needle valves 80 and 81 will be described with reference to FIGS. 2, 3, 8 and the like.

The needle valves 80 and 81 are arranged so as to be able to move up and down inside the second space R2 formed between the body 20 and the partition wall 50. The needle valves 80 and 81 of this embodiment have a disk-shaped base portion 83 and a columnar extending portion 84 extending from the center on one end surface side of the base portion 83. Further, a protrusion 85a protrudes concentrically with the extension 84 from the center on the other end surface side of the base 83, and the tip of the protrusion 85a in the protrusion direction is orthogonal to the axial direction of the protrusion 85a. The locking portion 85 is continuously provided. The locking portion 85 can be inserted into the needle valve locking hole 55 of the partition wall 50 and the needle valve locking hole 114 of the needle brackets 100 and 100, and by rotating the needle valves 80 and 81, the needle valve can be engaged. It can be locked in the stop hole 114.

Further, guide ribs 86, 86 extending in a thin plate shape along the axial direction of the needle valves 80, 81 are provided at two locations on the outer periphery of the extending portion 84 facing the circumferential direction. Each guide rib 86 is inserted into the gap between the needle support portion 30 and the guide portion 31 of the body 20 to guide the needle valves 80 and 81 to move up and down in the second space R2.

Further, a seal portion 87 made of a resin material such as rubber or rubber is attached to the outer periphery of the tip portion of the extension portion 84 in the extension direction. The outer periphery of the seal portion 87 has an inclined surface whose diameter gradually decreases toward the tip of the needle valve, and abuts on the seal portion 23a of the first opening 23 and the seal portion 24a of the second opening 24. The openings on the second chamber R2 side of the openings 23 and 24 are closed.

Then, from the end face of the extending portion 84, 84 of the needle valve 80, 81 in the extending direction, the thickness changes in a plurality of steps, and the valve heads 90, 91 are inserted and removed from the openings 23, 24. Is projected. The "thickness" in the present invention means the size of the cross-sectional area when the valve head is viewed from the axial direction. Further, in the present invention, the "valve head whose thickness changes in a plurality of stages and is inserted and removed from the opening" means that a plurality of heads having different thicknesses are concentrically and axially connected. Means composition.

More specifically, the valve head 90 on the needle valve 80 side has a constant outer diameter slightly smaller than the inner diameter of the first opening 23 and a predetermined height (axial direction of the needle valve) from the tip surface of the extending portion 84. The first head 92 protruding along the length) and the first head 92 having a constant outer diameter smaller than the outer diameter of the first head 92 and lower than the first head 92. The second head 93 protruding from the tip surface of the head through the step portion 93a, and the second head 93 having a constant outer diameter smaller than the outer diameter of the second head 93 and lower than the second head 92. It is composed of a third head 94 protruding from the tip surface of the head 93 via a step portion 94a.

That is, the valve head 90 has a circular protrusion shape provided with a constant outer diameter and a constant height, and the first head 92, the second head 93, and the third head 94 are concentric. It has a multi-stage projection continuous shape (here, a shape in which three-stage protrusions are continuously connected) so as to form a series in the axial direction.

On the other hand, the valve head 91 on the needle valve 81 side has a fourth head 95 protruding from the tip surface of the extending portion 84 with a constant outer diameter slightly smaller than the inner diameter of the second opening 24 and at a predetermined height. A fifth head protruding from the tip surface of the fourth head 95 via a step 96a at a constant outer diameter smaller than the outer diameter of the fourth head 95 and lower than the fourth head 95. No. 96, which has a constant outer diameter smaller than the outer diameter of the fifth head 96 and a height lower than the fifth head 96, and protrudes from the tip surface of the fifth head 96 via the step portion 97a. It consists of a head 97.

That is, the valve head 91 has a circular protrusion shape provided with a constant outer diameter and a constant height, and the fourth head 95, the fifth head 96, and the sixth head 97 are concentric. It has a multi-stage projection continuous shape (here, a shape in which three-stage protrusions are continuously connected) so as to form a series in the axial direction.

As described above, each of the valve heads 90 and 91 has a large outer diameter (maximum outer diameter) on the needle valve base end side, and the outer diameter gradually decreases toward the needle valve tip side. It has a head and has a shape in which the thickness changes in multiple steps.

The valve head 90 on the needle valve 80 side is inserted and removed from the first opening 23, and the insertion position with respect to the first opening 23 is changed by a drive unit described later. As a result, the ratio of the valve head 90 to the flow path area of the first opening 23 varies, so that the flow path area of the first opening 23 can be changed. That is, when the first head 92 is located in the first opening 23, the flow path area of the first opening 23 is the smallest, and when the second head 93 is located in the first opening 23, When the flow path area of the first opening 23 is larger than when the first head 92 is located in the first opening 23, and when the third head 93 is located in the first opening 23, the second head When the flow path area of the first opening 23 is larger than when the portion 92 is located at the first opening 23 and the entire valve head 90 comes out of the first opening 23, the flow of the first opening 23 The road area is the largest.

On the other hand, the valve head 91 on the needle valve 81 side is inserted and removed from the second opening 24, and the insertion position with respect to the second opening 24 is changed by the drive unit described later. As a result, the ratio occupied by the valve head 91 to the flow path area of the second opening 24 varies, so that the flow path area of the second opening 24 can be changed. That is, when the fourth head 95 is located in the second opening 24, the flow path area of the second opening 24 is the smallest (see FIG. 14), and the fifth head 96 is located in the second opening 24. When the flow path area of the second opening 24 is larger than that when the fourth head 95 is located in the second opening 24, and the sixth head 97 is located in the second opening 24. , When the flow path area of the second opening 24 is larger than when the fifth head 96 is located at the second opening 24, and the entire valve head 91 comes out of the second opening 24, the second opening The flow path area of the portion 24 is the largest.

The flow path area of the openings 23 and 24 is obtained by subtracting the cross-sectional area of the valve heads 90 and 91 at the portions located at the openings 23 and 24 from the opening areas of the openings 23 and 24.

Further, in the valve heads 90 and 91 in this embodiment, heads having a circular outer circumference are continuously provided in a plurality of stages corresponding to the first opening 23 and the second opening 24 having a circular hole shape. However, the shape of the valve head is not limited to this shape. For example, a conical trapezoidal head having a circular cross section and a tapered surface whose outer circumference gradually shrinks from the base end to the tip may be connected in multiple stages in the axial direction of the needle valve, or the cross section may be circular. A head with a curved outer circumference may be connected in multiple stages in the axial direction of the needle valve, or a head with a square cross section may be connected in multiple stages in the axial direction of the needle valve. You may. Further, the number of continuous heads constituting the valve head may be two stages or four or more stages. Further, in this embodiment, the valve heads 90 and 91 both have a three-stage head, but among the plurality of needle valves, the number of head stages of the valve head of a predetermined needle valve can be set to another needle. It may be increased or decreased with respect to the number of head stages of the valve head of the valve. Further, the shape and structure other than the valve head of the needle valve are not limited to the shape and structure in the above embodiment. Further, the number of needle valves may be one or three or more, and can be appropriately changed according to the number of openings formed in the partition wall.

The needle valves 80 and 81 having the above shape are configured to change the insertion position of the valve heads 90 and 91 with respect to the openings 23 and 24 by the drive unit. The drive unit of this embodiment is rotatably supported by the housing 11, has a stepped cam surface 160 formed on the outer periphery thereof, and supports a rotating body 150 rotated by a drive means and a pair of needle valves 80 and 81. It has a pair of needle brackets 100, 100 having a cam protrusion 130 capable of raising and lowering the cam surface 160, and the rotation of the rotating body 150 causes the cam surface 160 to press the cam protrusion 130, whereby the needle bracket 100, It is configured to move the 100 up and down. Further, in the drive unit in this embodiment, the needle valves 80, 81 of the pair of needle valves 80, 81 are sequentially changed to the insertion positions of the valve heads 90, 91 with respect to the pair of openings 23, 24. The valves 80 and 81 are configured to move. Further, in this embodiment, the cam protrusions 130 and 130 of the pair of needle brackets 100 and 100 are configured to be sequentially pressed against the cam surface 160 of the rotating body 150 one by one.

The needle valves 80 and 81 are mounted on the needle brackets 100 and 100. These needle brackets 100 and 100 are arranged inside the third space R2 formed between the partition wall 50 and the bracket 70 (see FIG. 3).

As shown in FIG. 2, the needle bracket 100 is slidable to the bracket main bodies 110 and 111 having alternating left and right shapes, the cam support member 120 mounted on the bracket main bodies 110 and 111, and the cam support member 120. It has a cam protrusion 130 supported by the.

The needle valve 80 is mounted on the bracket body 110 side, and the needle valve 81 is mounted on the bracket body 111 side. Further, as shown in FIG. 2, the bracket main bodies 110 and 111 have a frame-shaped cam mounting portion 112 having an opening on one side and a front side, and a box-shaped needle valve mounting portion 113 having an opening on the front side. And have. Further, on the bottom 112a side of the cam mounting portion 112, on the side opposite to the one side that is opened, a claw fitting recess 112b having a concave shape downward is formed. The cam mounting portion 112 is arranged in the frame 40 so that the opening direction of the front opening thereof is the same as the opening direction of the window portion 41a of the frame 40.

The needle valve mounting portion 113 is housed and arranged in a recess 53 of the partition wall 50, and a keyhole-shaped needle valve locking hole 114 is formed in the bottom portion 113a thereof. Then, after the needle valve mounting portion 113 is accommodated in the recess 53 of the partition wall 50 through the needle bracket insertion portion 45 of the frame 40, the needle valves 80 and 81 are locked from the back side of the needle valve locking hole 55 of the partition wall 50. The portion 85 is aligned, and the locking portion 85 is inserted into the needle valve locking hole 55 and the needle valve locking hole 114. After that, by rotating the needle valves 80 and 81, the locking portion 85 is locked to the front peripheral edge of the needle valve locking hole 114, so that the bottom portion 54 of the recess 53 of the partition wall 50 is the bottom portion of the needle valve mounting portion 113. The needle valves 80 and 81 are mounted on the needle bracket 100 in a state of being sandwiched between the 113a and the bases 83 of the needle valves 80 and 81.

Further, as shown in FIG. 3, the bracket main bodies 110 and 111 are arranged between the side wall 74 of the frame 40 and the guide ridges 75a so as to be guided in the third space R2 so as to be able to move up and down. ..

Further, as shown in FIG. 2, the spring support portion 115 projects from the front side of the bottom portion 112a of the cam mounting portion 112. A concave spring support recess 115a is formed on the ceiling surface side of the spring support portion 115. One end of the needle bracket urging spring S1 is supported by the spring support recess 115a. Further, the other end of the needle bracket urging spring S1 is supported by the spring support wall 78 of the bracket 70 (see FIG. 4). As a result, in the flacket bodies 110 and 111, the needle valve mounting portion 113 is urged in a direction close to the partition wall 22 of the body 20. Therefore, in the needle valves 80 and 81, the valve heads 90 and 91 are urged via the needle bracket urging spring S1 and the needle bracket 100 in a direction in which the insertion amount increases with respect to the openings 23 and 24 ( See arrow F2 in FIG. 8).

Further, as shown in FIG. 2, the cam support member 120 has a square box shape in which the tip end side is opened and the base end portion side is closed and extends by a predetermined length, and the cam accommodating portion 122 is formed inside the square box shape. There is. The cam projection 130 is slidably accommodated in the cam accommodating portion 122 via the cam projection urging spring S2. Further, the fitting claw 123 is projected from the bottom of the cam support member 120 on the base end side. Further, a locking hole 124 having a long hole shape is formed on the ceiling wall of the cam support member 120. The cam support member 120 is mounted on the cam mounting portion 112 by inserting the fitting claw 123 from the front opening of the cam mounting portion 112 and fitting the fitting claw 123 into the claw fitting recess 112b of the cam mounting portion 112. .. At this time, the cam support member 120 can be inserted from the front opening of the cam mounting portion 112 through the window portion 41a of the frame 40.

Further, the cam protrusion 130 has a tubular shape that opens at the base end side and closes at the opposite tip end 131 side to extend at a predetermined length, and a spring accommodating portion 132 is formed inside the cam protrusion 130. The cam projection urging spring S2 is accommodated in the spring accommodating portion 132. Further, on the base end side of the ceiling wall of the cam projection 130, a locking claw 133 that can be bent through a slit is formed. Then, the cam projection 130 accommodating the cam projection urging spring S2 in the spring accommodating portion 132 is inserted from the tip opening of the cam accommodating portion 122 of the cam support member 120, and the locking claw 133 is locked to the cam support member 120. Insert into hole 124. As a result, the cam protrusion 130 is slidably supported and held so as to be able to be prevented from coming off with respect to the cam support member 120 so that the amount of protrusion from the tip opening of the cam support member 120 changes. The sliding direction of the cam protrusion 130 is a direction along the longitudinal direction X (see FIG. 1) of the housing 11.

Further, the cam protrusion 130 is urged in the direction of protrusion from the tip opening of the cam support member 120 (see arrow F1 in FIG. 2) by the cam protrusion urging spring S2. As a result, as shown in FIGS. 9 to 11, the tip portion 131 of the cam protrusion 130 appropriately increases or decreases the amount of protrusion from the tip opening of the cam support member 120 when the rotating body 150 rotates, and will be described later. The outer circumference 155 of the rotating body 150, the outer circumference 157a of the hollowed portion 157, the outer circumference of the rotating shaft 152, and the outer circumference of the lateral protrusion 156 are always pressed against each other.

Further, on the bottom side of the cam protrusion 130 arranged in the third space R2 facing the bottom wall 44 side of the frame 40, a rounded curved top 135a and a ceiling wall from the top 135a. A pressing surface 135 composed of a pair of inclined surfaces 135b and 135b that gradually expands toward the side is provided. In this embodiment, the cam support member 120 that slides and holds the cam protrusion 130 is mounted on the cam mounting portion 112 of the bracket main bodies 110 and 111, and the bracket main bodies 110 and 111 are attached via the needle bracket urging spring S1. Since the cam surface 135 is urged in the direction of the arrow F2 in FIG. 8, the pressing surface 135 of the cam protrusion 130 is urged toward the cam surface 160 of the rotating body 150.

The cam protrusions 130 and 130 of the pair of needle brackets 100 and 100 are pressed by the cam surface 160 of the rotating body 150.

Referring to FIGS. 3, 8 and 9 to 11, the rotating body 150 of this embodiment has a substantially disk-shaped main body 151 having a predetermined thickness and the ceiling surface 151a of the main body 151 from the radial center. It has a rotating shaft 152 protruding with a predetermined length, a support shaft 153 protruding from the radial center of the bottom surface 151b of the main body 151, and a stepped cam surface 160 formed on the outer peripheral 155.

The rotary shaft 152 is connected to a drive shaft 77a (see FIG. 1) of a drive means 77 such as a motor, and when the drive shaft is driven, the rotating body 150 is driven in a predetermined direction (arrows in FIGS. 3 and 9). It is designed to rotate to (see F3). The rotation direction of the rotating body 150 is one direction indicated by the arrow F3 (there is no reverse rotation). Further, the support shaft 153 is rotatably supported by the rotating body support portion 76 of the bracket 70.

Further, the outer peripheral 155 of the main body 151 has a circular shape, and the outer peripheral 155 is provided with a cutting portion 157 that is cut within a predetermined range along the circumferential direction, and the cutting portion 157 has a staircase. The shape of the cam surface 160 is formed.

The cam surface 160 of this embodiment has a shape that rises stepwise from the bottom surface 151b side of the rotating body 150 toward the direction opposite to the rotation direction F3 of the rotating body 150.

Specifically, this cam surface 160 is
(1) A bottom surface 161 provided at a position separated from the ceiling surface 151a of the main body 151 and extending along the circumferential direction in a flat surface shape having a constant height.
(2) From the circumferential tip of the bottom surface 161 (meaning the end on the side opposite to the rotation direction F3, the same applies to the description of each surface below), the height gradually increases in the direction opposite to the rotation direction F3. The first inclined surface 162 that extends while inclining so as to
(3) A first flat surface 163 extending from the circumferential tip of the first inclined surface 162 in a direction opposite to the rotation direction F3 so as to form a flat surface having a constant height.
(4) A second inclined surface 164 extending from the circumferential tip of the first flat surface 163 in a direction opposite to the rotation direction F3 while being inclined so as to gradually increase.
(5) A second flat surface 165 extending from the circumferential tip of the second inclined surface 164 in a direction opposite to the rotation direction F3 so as to form a flat surface having a constant height.
(6) A third inclined surface 166 extending from the circumferential tip of the second flat surface 165 in a direction opposite to the rotation direction F3 while being inclined so as to gradually increase.
(7) A third flat surface 167 extending from the circumferential tip of the third inclined surface 166 in a direction opposite to the rotation direction F3 so as to form a flat surface having a constant height.
(8) It has a fourth inclined surface 168 extending from the circumferential tip of the third flat surface 167 in a direction opposite to the rotation direction F3 while being inclined so as to gradually increase.
Finally, the circumferential tip of the fourth inclined surface 168 is connected to the ceiling surface 151a of the main body 151.

As described above, the cam surface 160 of this embodiment has a bottom surface 161 and a first inclined surface 162, a first flat surface 163, and a first flat surface 163 along the circumferential direction of the rotating body 150 in the direction opposite to the rotation direction F2. The two inclined surfaces 164, the second flat surface 165, the third inclined surface 166, the third flat surface 167, and the fourth inclined surface 168 were formed in order, and the flat surfaces and the inclined surfaces were formed alternately and continuously. It has a stepped shape.

The cam surface 160 of this embodiment has a five-step staircase shape including the bottom surface 161 and the ceiling surface 151a (bottom surface 161, first flat surface 163, second flat surface 165, third flat surface). 167, ceiling surface 151a), may have a staircase shape of three steps, four steps, or six or more steps, and the shape and structure are not particularly limited. Further, the drive unit may have any shape or structure as long as it is possible to move the needle valve to change the insertion position of the valve head with respect to the opening.

Although the frame 40 and the partition wall 50 are omitted in FIG. 4, the rotating body 150 and the needle brackets 100 and 100 in which the needle valves 80 and 81 are attached to the frame 40 and the bracket 70 (not shown) are shown. After assembling various members to form an assembly (sub-assy body) as shown in FIG. 4, the entire control valve 10 can be assembled by assembling this assembly to the body 20 or the like. ..

(Action effect)
Next, the operation and operation / effect of the control valve 10 having the above structure will be described.

The above-mentioned rotating body 150 is adapted to move the needle bracket 100 up and down as follows. This will be described with reference to FIGS. 8 to 16. In this embodiment, the rotating body 150 is rotated by a driving means every 20 °, and the needle valves 80 and 81 move up and down accordingly. Note that FIGS. 8 to 16 show the rotation state every 40 ° for convenience. Further, FIG. 8 corresponds to FIG. 9A, FIG. 12 corresponds to FIG. 9B, FIG. 13 corresponds to FIG. 10A, and FIG. 14 corresponds to FIG. 10 (B). B) corresponds, FIG. 15 corresponds to FIG. 11 (A), and FIG. 16 corresponds to FIG. 11 (B). Further, in FIGS. 9 to 11, the cam protrusion 130 on the needle valve 80 side is shown on the right side in the figure, and the cam protrusion 130 on the needle valve 81 side is shown on the left side in the figure.

FIG. 8 shows a case where the insertion amount of the valve head 90 of the needle valve 80 into the first opening 23 is the maximum, and the insertion amount of the valve head 90 of the needle valve 81 into the second opening 24 is also the maximum. ing. In this case, the seal portion 87 of the needle valve 80 abuts on the seal portion 23a of the first opening 23, the first opening 23 is closed, and the needle is in contact with the seal portion 24a of the second opening 24. The seal portion 87 of the valve 81 abuts, and the second opening 24 is closed. The closed state of the second opening 24 is maintained until the rotating body 150 rotates (see FIGS. 12 to 14). Further, in this state, as shown in FIG. 9A, the tip portion 131 of the cam protrusion 130 on the needle valve 80 side is pressed against the outer peripheral 157a of the hollowed portion 157 of the rotating body 150, and the cam protrusion 130 is pressed. The pressing surface 135 is pressed against the bottom surface 161 of the cam surface 160, and the tip 131 of the cam protrusion 130 on the needle valve 81 side is pressed against the outer circumference 155 of the rotating body 150.

When the rotating body 150 rotates 20 ° in the F3 direction in this state, the tip 131 of the cam protrusion 130 on the needle valve 80 side is pressed against the outer circumference 157a of the hollowed portion 157, and the tip of the cam protrusion 130 on the needle valve 81 side is pressed. The rotating body 150 rotates while the portion 131 is pressed against the outer peripheral 155 of the rotating body 150. At the same time, the pressing surface 135 of the cam projection 130 is pressed against the first inclined surface 162 of the cam surface 160, and the needle valve 80 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After ascending, when the first flat surface 163 of the cam surface 160 presses the pressing surface 135 of the cam projection 130, the ascending of the needle valve 80 stops. As a result, the seal portion 87 of the needle valve 80 is separated from the seal portion 23a of the first opening 23, the first opening 23 is opened, and the first head 92 is located in the first opening 23. , The flow path area of the first opening 23 is minimized.

After that, as shown in FIG. 9B, when the rotating body 150 rotates 20 ° in the F3 direction (rotation of 40 ° in total), the tip 131 of the cam protrusion 130 on the needle valve 80 side has the outer circumference 157a of the hollowed portion 157. The rotating body 150 rotates while being pressed against the outer circumference 155 of the rotating body 150 while the tip 131 of the cam protrusion 130 on the needle valve 81 side is pressed against the rotating body 150. At the same time, the pressing surface 135 of the cam projection 130 is pressed against the second inclined surface 164 of the cam surface 160, and the needle valve 80 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After ascending, when the second flat surface 165 of the cam surface 160 presses the pressing surface 135 of the cam projection 130, the ascending of the needle valve 80 stops. As a result, as shown in FIG. 12, the second head 93 is located in the first opening 23, and the flow path area of the first opening 23 becomes large.

After that, when the rotating body 150 rotates 20 ° in the F3 direction (rotation of 60 ° in total), the tip 131 of the cam protrusion 130 on the needle valve 80 side is pressed against the outer peripheral 157a of the hollowed portion 157, and the needle valve 81 side. The rotating body 150 rotates while the tip 131 of the cam projection 130 is pressed against the outer peripheral 155 of the rotating body 150. At the same time, the pressing surface 135 of the cam protrusion 130 is pressed against the third inclined surface 166 of the cam surface 160, and the needle valve 80 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After ascending, when the third flat surface 167 of the cam surface 160 presses the pressing surface 135 of the cam projection 130, the ascending of the needle valve 80 stops. As a result, the third head 94 is located in the first opening 23, and the flow path area of the first opening 23 is further increased.

After that, as shown in FIG. 10A, when the rotating body 150 rotates 20 ° in the F3 direction (rotation of 80 ° in total), the tip 131 of the cam protrusion 130 on the needle valve 80 side becomes the lateral protrusion 156. The rotating body 150 rotates while being pressed against the outer circumference and the tip 131 of the cam protrusion 130 on the needle valve 81 side is pressed against the outer circumference 155 of the rotating body 150. At the same time, the pressing surface 135 of the cam projection 130 is pressed against the fourth inclined surface 168 of the cam surface 160, and the needle valve 80 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After that, the cam protrusion 130 rides on the ceiling surface 151a of the main body 151, and when the ceiling surface 151a presses the pressing surface 135 of the cam protrusion 130, the needle valve 80 stops rising. As a result, as shown in FIG. 13, the valve head 91 completely escapes from the first opening 23 (the first opening 23 is fully opened), and the flow path area of the first opening 23 becomes maximum.

After that, when the rotating body 150 rotates in the F3 direction, the cam protrusion 130 rides on the ceiling surface 151a, the pressed surface 135 is maintained in a pressed state, the height of the needle valve 80 is maintained, and the needle valve 80 is held. 1 The fully open state of the opening 23 is maintained. The fully open state of the first opening 23 is maintained until the rotating body 150 rotates 360 ° and the cam protrusion 130 on the needle valve 80 side enters the hollowed portion 157 again. Then, as shown in FIG. 10B, when the rotating body 150 rotates 100 ° in the F3 direction (rotation of 180 ° in total), the cam protrusion 130 on the needle valve 80 side is pressed against the outer periphery of the rotating shaft 152, and The tip 131 of the cam protrusion 130 on the needle valve 81 side enters the hollowed portion 157, and the rotating body 150 rotates while being pressed by the outer peripheral 157a thereof. In this case, the needle valve 81 does not rise yet, and the seal portion 87 of the needle valve 81 comes into contact with the seal portion 24a of the second opening 24, and the second opening 24 is maintained in a closed state. (See FIG. 14).

When the rotating body 150 rotates 20 ° in the F3 direction in this state (rotation of 200 ° in total), the tip 131 of the cam protrusion 130 on the needle valve 81 side is pressed against the outer peripheral 157a of the hollowed portion 157, and the needle valve 80 is pressed. The rotating body 150 rotates while the tip 131 of the cam protrusion 130 on the side is pressed against the outer periphery of the rotating shaft 152. At the same time, the pressing surface 135 of the cam projection 130 is pressed against the first inclined surface 162 of the cam surface 160, and the needle valve 81 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After ascending, when the first flat surface 163 of the cam surface 160 presses the pressing surface 135 of the cam projection 130, the ascending of the needle valve 81 stops. As a result, the seal portion 87 of the needle valve 81 is separated from the seal portion 24a of the second opening 24, the second opening 24 is opened, and the fourth head 95 is located in the second opening 24. , The flow path area of the second opening 24 is minimized.

After that, as shown in FIG. 11A, when the rotating body 150 rotates 20 ° in the F3 direction (rotation of 220 ° in total), the tip 131 of the cam protrusion 130 on the needle valve 81 side has the outer periphery 157a of the hollowed portion 157. The rotating body 150 rotates while being pressed against the outer circumference of the rotating shaft 152 while the tip 131 of the cam protrusion 130 on the needle valve 80 side is pressed against the outer circumference of the rotating shaft 152. At the same time, the pressing surface 135 of the cam protrusion 130 is pressed against the second inclined surface 164 of the cam surface 160, and the needle valve 81 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After ascending, when the second flat surface 165 of the cam surface 160 presses the pressing surface 135 of the cam projection 130, the ascending of the needle valve 81 stops. As a result, as shown in FIG. 15, the fifth head 96 is located in the second opening 24, and the flow path area of the second opening 24 becomes large.

After that, when the rotating body 150 rotates 20 ° in the F3 direction (rotation of 240 ° in total), the tip 131 of the cam protrusion 130 on the needle valve 81 side is pressed against the outer peripheral 157a of the hollowed portion 157, and the needle valve 80 side. The rotating body 150 rotates while the tip 131 of the cam projection 130 is pressed against the outer periphery of the rotating shaft 152. At the same time, the pressing surface 135 of the cam protrusion 130 is pressed against the third inclined surface 166 of the cam surface 160, and the needle valve 81 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After ascending, when the third flat surface 167 of the cam surface 160 presses the pressing surface 135 of the cam projection 130, the ascending of the needle valve 81 stops. As a result, the sixth head 97 is located in the second opening 24, and the flow path area of the second opening 24 is further increased.

After that, as shown in FIG. 11B, when the rotating body 150 rotates 20 ° in the F3 direction (total rotation of 260 °), the tip 131 of the cam protrusion 130 on the needle valve 81 side becomes the lateral protrusion 156. The rotating body 150 rotates while being pressed against the outer circumference and the tip 131 of the cam protrusion 130 on the needle valve 80 side is pressed against the outer circumference 155 of the rotating shaft 152. At the same time, the pressing surface 135 of the cam protrusion 130 is pressed against the fourth inclined surface 168 of the cam surface 160, and the needle valve 81 is pressed via the needle bracket 100 against the urging force of the needle bracket urging spring S1. After that, the cam protrusion 130 rides on the ceiling surface 151a of the main body 151, and when the ceiling surface 151a presses the pressing surface 135 of the cam protrusion 130, the needle valve 81 stops rising. As a result, as shown in FIG. 16, the valve head 91 completely escapes from the second opening 24 (the second opening 24 is fully opened), and the flow path area of the second opening 24 becomes maximum.

When the rotating body 150 further rotates and rotates 360 ° in total, the cam protrusion 130 on the needle valve 80 side reenters the hollowed portion 157, and the state shown in FIG. 9B is obtained. In this case, the needle valves 80 and 81 are urged via the needle brackets 100 and 100, and the valve heads 90 and 91 of the needle valves 80 and 81 are inserted into both openings 23 and 24 as much as possible. , As shown in FIG. 8, both openings 23 and 24 are fully closed. After that, when the rotating body 150 rotates, the operations of FIGS. 9 (B), 10 (A), 10 (B), 11 (A), and 11 (B) are repeated, and both openings 23, The insertion positional relationship of the needle valves 80 and 81 and the valve heads 90 and 91 with respect to 24 is as shown in FIGS. 12 to 16.

As described above, in this embodiment, the stepped cam surface 160 as described above is provided, and the pair of needle valves 80, 81 are provided by the cam surface 160 via the pair of needle brackets 100, 100. By moving up and down, the flow path areas of both openings 23 and 24 can be controlled in the following plurality of steps (1) to (9).

That is,
(1) The first opening 23 and the second opening 24 are fully closed (the total flow path area of both openings 23 and 24 is 0).
(2) A state in which the flow path area of the first opening 23 is increased by one step while maintaining the fully closed state of the second opening 24 (the flow path area of the first opening 23 is the smallest, and both openings 23). , 24 total channel area is the smallest),
(3) A state in which the flow path area of the first opening 23 is increased by two steps while maintaining the fully closed state of the second opening 24 (the flow path area of the first opening 23 is larger than the above (2). , The total flow path area of both openings 23, 24 is larger than (2)),
(4) A state in which the flow path area of the first opening 23 is increased by three steps while maintaining the fully closed state of the second opening 24 (the flow path area of the first opening 23 is larger than that of the above (3). The total flow path area of both openings 23 and 24 is larger than (3)),
(5) While maintaining the fully closed state of the second opening 24, the first opening 23 is in the fully open state (the flow path area of the first opening is maximized, and the total flow path area of both openings 23 and 24 is (Greater than (4)),
(6) A state in which the flow path area of the second opening 24 is increased by one step while the fully open state of the first opening 23 is maintained (the flow path area of the second opening 24 is the smallest, and both openings 23, The total channel area of 24 is larger than (5)),
(7) A state in which the flow path area of the second opening 24 is increased by two steps while maintaining the fully open state of the first opening 23 (the flow path area of the second opening 24 is larger than that of the above (6), both. The total flow path area of the openings 23 and 24 is larger than (6)),
(8) A state in which the flow path area of the second opening 24 is increased by three steps while maintaining the fully open state of the first opening 23 (the flow path area of the second opening 24 is larger than that of the above (7), both. The total flow path area of the openings 23 and 24 is larger than (7)),
(9) The first opening 23 and the second opening 24 are fully opened (the flow path areas of both openings 23 and 24 are the maximum).

Then, in the control valve 10, as shown in FIGS. 9 to 11, the rotating body 150 is rotated by a predetermined angle in the direction of the arrow F3 by the driving unit, so that the needle is shown in FIGS. 3 and 12 to 16. The pair of needle valves 80, 81 can be moved up and down via the brackets 100, 100 to change the insertion position of the valve heads 90, 91 with respect to the openings 23, 24. As a result, as described above, the flow path areas of both openings 23 and 24 can be appropriately changed according to the number of steps on the outer periphery of the valve head, and the flow path areas of both openings 23 and 24 can be set in a plurality of steps. Can be controlled with.

Further, in this embodiment, a plurality of openings are provided in the partition wall 22 (here, openings 23, 24), and a plurality of needle valves 80, 81 are provided corresponding to the plurality of openings 23, 24. The drive unit has needle valves such that the valve heads 90 and 91 of the plurality of needle valves 80 and 81 are sequentially changed one by one with respect to the plurality of openings 23 and 24. It is configured to move 80,81.

According to this aspect, the drive unit changes the insertion position of the valve heads 90, 91 of the plurality of needle valves 80, 81 one by one with respect to the plurality of openings 23, 24. Since the valves 80 and 81 are moved (see FIGS. 3 and 12 to 16), the flow path area of the openings 23 and 24 can be controlled in more stages.

Further, in this embodiment, as shown in FIGS. 2, 3 and 8 to 16, the drive unit is rotatably supported by the housing 11, and a stepped cam surface 160 is formed on the outer periphery to drive the drive unit. It has a rotating body 150 that is rotated by means, and a pair of needle brackets 100, 100 that support a pair of needle valves 80, 81 and have a cam protrusion 130 that can raise and lower the cam surface 160. The cam surface 160 presses the cam protrusion 130 by rotation, so that the needle brackets 100 and 100 are moved up and down.

According to this aspect, the needle bracket 100 is moved up and down by the cam surface 160 pressing the cam protrusion 130 due to the rotation of the rotating body 150, so that the responsiveness is improved as compared with, for example, the raising and lowering operation by the ball screw. This makes it possible to quickly raise and lower the needle bracket 100, and thus to raise and lower the needle valves 80 and 81 quickly.

Further, in this embodiment, as shown in FIGS. 2, 3 and 8 to 15, the drive unit has a plurality of needle brackets 100 and 100 that support the plurality of needle valves 80 and 81, respectively. The cam protrusions 130 and 130 of the plurality of needle brackets 100 and 100 are configured to be sequentially pressed against the cam surface 160 of the rotating body 150 one by one.

According to this aspect, the cam protrusions 130 and 130 of the plurality of needle brackets 100 and 100 are sequentially pressed against the cam surface 160 of the rotating body 150 one by one, so that one rotating body is used. At 150, a plurality of needle valves 80 and 81 can be moved up and down in order, the structure of the drive unit can be simplified, and the entire device can be made compact.

Further, in this embodiment, as shown in FIGS. 3 and 8, a partition wall 50 made of an elastic material is arranged in the housing 11 at a position facing the partition wall 22, and the needle valves 80 and 81 have the needle valves 80 and 81. , The partition wall 50 is supported in a state of being sandwiched between the needle bracket 100 and the needle bracket 100.

According to this aspect, since the needle valves 80 and 81 are supported with the partition wall 50 sandwiched between the needle valves 80 and 81, the needle valves 80 and 81 and the needle bracket 100 are made of an elastic material. It can be sealed by the partition wall 50, and the airtightness of the second space R2 can be maintained. Further, since the partition wall 50 is made of an elastic material, when the needle valves 80 and 81 move up and down, they expand and contract appropriately like a diaphragm, so that the needle valves 80 and 81 can be moved up and down while maintaining the sealing property. can.

Further, in this embodiment, in the needle racket 100, the valve heads 90 and 91 of the needle valves 80 and 81 have openings 23 and 24 by means of urging means (here, the needle bracket urging spring S1). The cam projection 130 is configured to be urged in the direction of being inserted into the cam surface 160 and in the direction of being pressed against the cam surface 160.

According to this aspect, the needle valve 80 is urged by the urging means in the direction in which the valve heads 90, 91 of the needle valves 80, 81 are inserted into the openings 23, 24. , 81 can function as a relief valve that opens an opening to allow fuel vapor to escape when the pressure in the fuel tank rises. Further, since the needle racket 100 is urged in the direction in which the cam protrusion 130 is pressed against the cam surface 160 by the urging means, the raising and lowering operations of the needle valves 80 and 81 due to the rotational operation of the rotating body 150 are stable. Will be done.

Further, the present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. ..

10 Flow path area control valve (control valve)
11 Housing 20 Body 23 1st opening 24 2nd opening 40 Frame 50 Partition 60 Lid 70 Bracket 80, 81 Needle valve 90, 91 Valve head 100 Needle bracket 110, 111 Bracket body 120 Cam support member 130 Cam protrusion 150 Rotating body 160 Cam surface S1 Energizing spring with needle bracket S2 Energizing spring with cam protrusion

Claims (6)

1. A first space communicating with the inside of the fuel tank and a second space communicating with the outside of the fuel tank are provided through the partition wall, and an opening for communicating the first space and the second space in the partition wall. The housing and the housing, which are provided with
   A needle valve arranged on the second space side and having a valve head whose thickness changes in a plurality of stages and is inserted into and removed from the opening.
   A flow path area control valve for a fuel tank, characterized by having a drive unit for moving the needle valve to change the insertion position of the valve head with respect to the opening.
2. A plurality of the openings are provided in the partition wall, and the openings are provided in the partition wall.
   It has multiple needle valves for multiple openings and has multiple needle valves.
   The flow path for a fuel tank according to claim 1, wherein the drive unit moves the needle valves so that the valve heads of the plurality of needle valves change their insertion positions one by one with respect to the plurality of openings. Area control valve.
3. The drive unit
   A rotating body that is rotatably supported by the housing, has a stepped cam surface formed on the outer circumference, and is rotated by a driving means.
   It has a needle bracket that supports the needle valve and has a cam protrusion that can raise and lower the cam surface.
   The flow path area control valve for a fuel tank according to claim 1 or 2, wherein the needle bracket is moved up and down by the cam surface pressing the cam protrusion due to the rotation of the rotating body.
4. A plurality of the openings are provided in the partition wall, and the openings are provided in the partition wall.
   It has multiple needle valves for multiple openings and has multiple needle valves.
   The drive unit is configured to move the needle valve so as to change the insertion position of the valve heads of the plurality of needle valves one by one with respect to the plurality of openings.
   The drive unit has a plurality of needle brackets that each support a plurality of needle valves.
   The flow path area control valve for a fuel tank according to claim 3, wherein the cam protrusions of the plurality of needle brackets are sequentially pressed against the cam surface of the rotating body one by one.
5. In the housing, a partition wall made of an elastic material is arranged at a position facing the partition wall.
   The flow path area control valve for a fuel tank according to claim 3 or 4, wherein the needle valve is supported with the partition wall sandwiched between the needle valve and the needle bracket.
6. The needle racket is urged by an urging means in a direction in which the valve head of the needle valve is inserted into the opening and in a direction in which the cam protrusion is pressed against the cam surface. The flow path area control valve for the fuel tank according to any one of 5 to 5.

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