JP2802220B2 - Flow control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control valve used for a carburetor of an internal combustion engine, for example.

[0002]

FIG. 13 is a sectional view of a conventional flow control valve.
The hollow valve box 100 has a flow path 101. A fluid transport cylinder 103 is inserted and fixed in the hole 102 of the valve box 100. The fluid transport cylinder 103 has a fluid transport path 104 along the axis A, and is provided with a slit 105 communicating with the flow path 101 and the fluid transport path 104 along the circumferential direction. The distal end of the fluid transport cylinder 103 in the insertion direction is closed.

[0003] A valve box 100 has a hole 10 opposed to a hole 102.
6, and a cylindrical valve body 107 is rotatably inserted into the hole 106. A recess 108 having a circular cross section is provided at the tip of the valve element 107 in the insertion direction, and the tip of the fluid transport cylinder 103 is disposed in the recess 108.

A notch 1 is provided at the end of the valve body 107 in the insertion direction.
09 is provided, and a rotating member, for example, a knob 110 is integrally provided at the exposed end.

In the flow control valve, the knob 110 is rotated forward or backward to rotate the valve body 107 and adjust the opening and closing of the slit 105.

[0006]

In the conventional flow control valve, since the rotation angle of the knob 110 is equal to the rotation angle of the valve element 107, it is difficult to finely adjust the opening / closing degree of the slit 105, and it is difficult to perform appropriate flow control. I couldn't do it.

An object of the present invention is to provide a flow control valve capable of finely adjusting the degree of opening and closing of a slit of a fluid transport cylinder.

[0008]

According to the first aspect of the present invention,
A valve box having a flow path, provided in the valve box, a fluid transport path along an axis, and communicating with the fluid transport path and the flow path, and a longitudinal slit along the axis. And a valve body provided on the valve box and provided in contact with either the inside or the outside of the fluid transport cylinder, wherein the fluid transport cylinder and the valve body are A first operation unit configured to be rotatable and relatively movable along the axis, provided with an opening / closing surface that is non-perpendicular to the axis on the valve body, and rotatably provided outside the valve box; Is connected to one of the valve body and the fluid transport cylinder, a rotatable second operating member is provided outside the valve box, and either the fluid transport cylinder or the valve body and the second operating member are provided. And the rotation of the second operating member causes the fluid transport cylinder or the valve element to rotate. Re or one provided with a actuating member for moving along said axis.

According to a second aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
While providing a screw hole parallel to the axis in the valve box,
A screw member was screwed into the screw hole, and the tip of the shaft of the screw member was in contact with the other end of the valve body.

According to a third aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve body, and is provided with an operation rod rotatably provided outside the valve box, other than the valve body. Connect to the end,
An operation in which a cam plate having an inclined surface is rotatably provided outside the valve box, a hole is provided in the valve box in parallel with the axis, and the hole comes into contact with the other end of the valve body and the inclined surface. A bar was operably disposed along the axis.

According to a fourth aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve body, and is provided with an operation rod rotatably provided outside the valve box, other than the valve body. Connect to the end,
A cam plate having an inclined surface is provided outside the valve box so as to be movable orthogonally to the axis, a hole is provided in the valve box in parallel with the axis, and the other end of the valve body and the hole are provided in this hole. An operating rod in contact with the inclined surface is operably arranged along the axis, and one end of the cam plate is in contact with a tip of a shaft portion of a screw member screwed into a screw hole orthogonal to the axis.

According to a fifth aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
A rotary shaft orthogonal to the axis is provided from outside to inside of the valve box, and a cam plate is provided on the rotary shaft to abut on the other end of the valve body.

According to a sixth aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
A rotatable cam plate is provided outside the valve box, a hole parallel to the axis is provided in the valve box, and an operating rod abutting on the other end of the cam plate and the valve body is provided in the hole. It was operably arranged along.

According to a seventh aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
An external thread concentric with the axis is provided on the outer periphery of the valve box, a holder having a female screw meshing with the external thread is provided outside the valve box, and a hole parallel to the axis is provided in the valve box. An operating rod abutting on the other end of the holder and the valve body is operably disposed in the hole along the axis.

In the invention described in claim 8, the plurality of slits are provided along the circumferential direction of the fluid transport cylinder.

[0016]

According to the first aspect of the invention, when the first operating portion is rotated, one of the valve body and the fluid transport cylinder is rotated, and the slit is opened and closed. When the second operating portion is rotated, the rotation is converted into a linear motion along the axis of the operating member, and the fluid transport cylinder or the valve moves along the axis by this linear motion to open and close the slit. The amount of actuation is subdivided by a series of motion conversions, and the actuation rate of the valve body is smaller than the actuation rate of the second operating portion.

[0017]

【Example】

(First Embodiment) FIG. 1 is a front sectional view of a flow control valve applied to a carburetor of an internal combustion engine, and FIG. 2 is a side sectional view taken along line BB of FIG.

A cubic valve box 1 made of metal, for example, aluminum or the like is provided with a valve body storage chamber 2 having a circular cross section penetrating between two opposing side surfaces 1A and 1B. The other two opposite side surfaces 1C and 1D of the valve box 1 are integrally provided with a cylindrical sleeve 4 having a flow path 3 having a circular cross section.

The metal fluid transport cylinder fixed to the side surface 1A of the valve body storage chamber 2, for example, the fuel injection cylinder 5, is mounted on the valve body storage chamber 2.
A disk portion 6 in contact with the disk portion 6, a tube portion 7 provided outside the disk portion 6, and an injection tube 8 provided inside the disk portion 6.

The cylinder portion 7 and the injection cylinder 8 are located on the axis C at the center of the disk portion 6 and penetrate the fluid transport passage 9 along the axis C. The injection cylinder 8 communicates with the fluid transport path 9 and the flow path 3 and has a longitudinal slit 1 along the axis C.
0 is provided.

Further, a circular hole 12 is formed in the metal plate 11 fixed to the side surface 1B so as to correspond to the axis C, and a screw parallel to the axis C facing the valve body storage chamber 2 is formed. A hole 13 is provided.

A valve element 14 is provided in the valve element storage chamber 2.
The valve element 14 is rotatable about the axis C and has a circular outer peripheral surface so as to be reciprocally movable along the axis C.

The valve element 14 has a cavity 15 perpendicular to the axis C, and a hole 16 having a circular cross section along the axis C. The inner diameter of the cavity 15 is set substantially equal to the inner diameter of the flow path 3.

The injection cylinder 8 is inserted into the hole 16, and the inner diameter of the hole 16 is set larger than the outer diameter of the injection cylinder 8. A compression spring 17 is provided between the disc 6 and the valve body 14.
The compression spring 17 connects the valve element 14 to the plate 1
Pressing to one side.

The valve body 14 is provided with a cylindrical portion 18 facing the cavity 15 and extending along the axis C. The injection cylinder 8 is inserted into the hole 18A of the cylindrical part 18, and the cylindrical part 18 is rotatable and reciprocally movable with its inner peripheral surface in contact with the outer peripheral surface of the injection cylinder 8.

The cylindrical portion 18 is cut obliquely in a straight line.
An opening / closing surface 19 that is not orthogonal to the axis C is formed.

A first operating portion, for example, an operating rod 20 is provided on the plate 11 side of the valve body 14 along the axis C. The operating rod 20 is exposed to the outside of the valve box 1 through the hole 12. I have.
A knob 21 is provided at an exposed end of the operation rod 20 to block a hole 18A communicating with the cylindrical portion 18. A knob (not shown) is provided on the knob. The outer diameter of the operation rod 20 is set smaller than the inner diameter of the hole 12.

A second operating member, for example, a screw member 22 is provided on the outside of the valve box 1, and a shaft portion 23 of the screw member 22 is screwed into the screw hole 13, and a tip of the screw member 22 contacts the valve body 14.
The screw member 22 also functions as an operating member.

A notch 25 is provided on the plate 11 side of the valve body 14 to form an arcuate regulating surface 24, while the tip of a regulating screw 26 that has reached the valve body storage chamber 2 from the side surface 1 C of the valve box 1. It is located in the notch 25.

In this embodiment, when the cylindrical portion 18 is at the position shown in FIG. 3A, the slit 10 is fully opened, the cavity 15 of the valve element 14 is at the position shown by the dotted line in FIG. 15 communicates in a fully open state. For this reason, the fuel supplied from the fluid transport path 9 is injected into the cavity 15 through the slit 10 and mixed with the air supplied from the flow path 3 to obtain an air-fuel mixture.

When the knob 21 is rotated forward as shown in FIG. 3B, the cylindrical portion 18 is also rotated in the same direction and the slit 1 is rotated.
0 gradually decreases, and the flow path 3 and the cavity 15
Also gradually decreases.

When the knob 21 is further rotated forward as shown in (C), the slit 10 is closed, and the flow path 3
And the cavity 15 are closed.

On the other hand, as shown in FIG. 1, when the screw member 22 is rotated forward (tightened) by a driver with the flow path 3 and the cavity 15 fully opened, the screw member 22 moves linearly. The linear movement of the screw member 22 causes the valve body 14 to move toward the fuel injection cylinder 5 against the elastic force of the compression spring 17, and the slit 10 is gradually closed.

When the screw member 22 is rotated in the reverse direction (loosened), the valve element 14 is actuated toward the plate 11 by the elastic force of the compression spring 17, and the slit 10 is gradually closed.

As described above, when the rotational movement of the screw member 22 is converted into a linear movement, the amount of movement is subdivided in accordance with the pitch of the screw holes 13, and the operation rate of the screw member 22, that is, the amount of rotation is smaller than the rotation amount. The operation rate of the body 14, that is, the operation amount is smaller, and the opening / closing amount of the slit 10 can be finely adjusted, so that appropriate flow control can be performed.

When the screw member 22 is rotated, only the fuel injection changes, the amount of air is constant, and the mixture ratio of the air-fuel mixture can be changed.

The rotation of the valve body 14 is limited to a certain angle by the contact of the regulating screw 26 with the regulating surface 24.

(Second Embodiment) FIG. 4 is a front sectional view showing a main part of a flow control valve. A second operating member in the screw hole 13;
For example, the screw member 27 is screwed. The screw member 27 also has a function as an operating member, and the tip thereof is
And a handle 29 is provided on the other end via a link 28. Other configurations are the same as in the first embodiment.

In this embodiment, when the handle member 29 is operated to rotate the screw member 27 forward and backward, the rotation is converted into a linear motion of the valve body 14 to open and close the slit 10, thereby obtaining the same effect as in the first embodiment. Can be

(Third Embodiment) FIG. 5 is a front sectional view showing a main part of a flow control valve. The plate 11 is provided with a hole 30 parallel to the axis C, into which a reciprocally movable operating member, for example, an operating rod 31 is inserted.

A second operating member, for example, a circular cam plate 33 that rotates about a shaft 32 is provided outside the valve body 1. The shaft 32 is held by a frame 35, and a knob 3
6 is provided.

The shaft 32 is parallel to the axis C, and the cam plate 33
Is formed with an inclined surface 34 inclined with respect to the axis 32. One end of the operating rod 31 is in contact with the valve body 14, and the other end is in contact with the inclined surface 34. The rest is configured similarly to the first embodiment.

In this embodiment, when the cam plate 33 is rotated by 180 degrees by operating the knob 36, the operating rod 31 is moved to the inclined surface 34.
Actuates to the left in the figure to move the valve body 14 linearly,
The slit 10 is closed.

When the cam plate 33 is further rotated by 180 degrees, the operating rod 31 moves to the right side in the figure along the inclined surface 34 to linearly move the valve body 14 and the slit 10 is opened. As described above, the same effects as those of the first embodiment can be obtained in this embodiment.

(Fourth Embodiment) FIG. 6 is a front sectional view showing a main part of a flow control valve. A screw hole 39 of a nut 38 fixed to a frame 37 outside the valve element 1 is orthogonal to the axis C, and the frame 37 is provided with a slidable cam plate 40 orthogonal to the axis C. The cam plate 40 has an axis C
Has an inclined surface 43 inclined with respect to.

A second operating member, for example, a screw member 41 is screwed into the screw hole 39, and the tip of the shaft portion 42 is in contact with the cam plate 40. The frame 37 has a protruding portion 44, and a compression spring 45 is mounted between the protruding portion 44 and the cam plate 40 to press the cam plate 40 toward the screw member 41.

One end of the operating rod 31 is in contact with the valve body 14, and the other end is in contact with the inclined surface 43. The rest is configured similarly to the first and second embodiments.

In this embodiment, when the screw member 41 is rotated forward and backward, the cam plate 40 reciprocates up and down in the figure. Then, the operating rod 31 moves linearly along the inclined surface 43, that is, reciprocates, the valve body 14 is operated, and the opening and closing of the slit 10 is performed.
The same effects as in the first embodiment can be obtained.

(Fifth Embodiment) FIG. 7 is a front sectional view showing a main part of a flow control valve. The valve box 1 is provided with a shaft hole (not shown) orthogonal to the shaft center C, and a second operating member, for example, a rotary shaft 46 is rotatably inserted into the shaft hole.

The rotary shaft 46 extends from the inside to the outside of the valve box 1, and an operating member, for example, an elliptical cam plate 47 is attached to an end on the inner side. The outer peripheral surface of the cam plate 47 is in contact with the valve body 14, and a knob (not shown) is provided at an outer end of the rotary shaft 46. The rest is configured similarly to the first embodiment.

In this embodiment, when the rotary shaft 46 is rotated forward and backward by operating a knob (not shown) and the cam plate 47 is rotated forward and backward, the valve 14 linearly moves and the slit 10 is opened and closed. The same effect can be obtained.

(Sixth Embodiment) FIG. 8 is a front sectional view showing a main part of a flow control valve. The plate 11 is provided with a hole 48 parallel to the axis C. In the hole 48, an operating member, for example, an operating rod 49 is inserted so as to be reciprocally movable.

An axis 50 perpendicular to the axis C is provided outside the valve box 1.
An elliptical cam plate 51 that rotates about the center is provided, and a knob (not shown) is provided on the shaft 50. One end of the operating rod 49 is in contact with the valve body 14, and the other end is in contact with the outer peripheral surface of the cam plate 51. The rest is configured similarly to the first embodiment.

In this embodiment, the rotary shaft 50 is rotated by operating a knob (not shown), and the rotary motion is converted into a linear motion of the operating rod 49 by the cam plate 51 to operate the valve body 14, whereby the slit 10 is opened and closed. Thus, the same effect as in the first embodiment can be obtained.

(Seventh Embodiment) FIG. 9 is a front sectional view showing a main part of a flow control valve. The valve box 1 is provided with a sleeve 54 concentric with the axis C, and a screw 52 is provided on the outer periphery of the sleeve 54. Outside the valve box 1, a cylindrical holder 5 having a second operating member, for example, a female screw 53 meshing with a male screw 52 is provided.
5 is provided.

A hole 56 concentric with the axis C is formed in the holder 55, and the operation rod 20 is inserted into the hole 56. Hole 5
The inner diameter of 6 is set larger than the outer diameter of the operation rod 20. The plate 11 is provided with a hole 57 parallel to the axis C, and an operation member, for example, an operation rod 58 is inserted into the hole 57 so as to be reciprocally movable.

One end of the operating rod 58 contacts the valve element 14, and the other end contacts the inner surface of the holder 55. The rest is configured similarly to the first embodiment.

In this embodiment, when the holder 55 is rotated forward and backward, this rotational movement is converted into a linear movement of the operating rod 58, the valve body 14 reciprocates, the slit 10 is opened and closed, and the same as in the first embodiment. The effect can be obtained.

(Eighth Embodiment) FIG. 10 is a partial front view showing an example of the construction of the injection cylinder 8 and the cylindrical portion 18. (A),
(B) is an example in which the opening / closing surface 19 is curved in one direction.
(C) and (D) are examples in which the opening / closing surface 19 is alternately curved along the axis C. The rest is configured similarly to the first embodiment.

With this configuration, the same effect as that of the first embodiment can be obtained, and the opening / closing amount of the slit 10 corresponding to the unit rotation amount of the valve body 14 changes, so that delicate flow control can be performed. .

(E) is an example in which the shape of the slit 10 is curved into a warhead shape. The rest is configured similarly to the first embodiment. With this configuration, the same effect as in the first embodiment can be obtained, and the opening / closing amount of the slit 10 corresponding to the unit reciprocating operation amount of the valve body 14 changes, so that the opening / closing characteristics can be finely changed.

(Ninth Embodiment) FIG. 11 shows another example of the structure of the cylindrical portion 18. In this embodiment, an opening / closing surface 19 is formed by cutting a part of the cylindrical portion 18. Other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained. (Tenth embodiment) FIG. 12 shows another example of the configuration of the cylindrical portion 18.
(A) shows a plurality of slits 1 having the same length along the circumferential direction.
0, and (B) provided a plurality of slits 10 having different lengths. With this configuration, in addition to the same effects as those of the first embodiment, the opening / closing amount of the slit corresponding to the unit rotation amount of the second operation member changes, so that there is an effect that fine flow control can be performed.

(Eleventh Embodiment) In the first to tenth embodiments, the fuel injection cylinder 5 is fixed, and the valve element 14 rotates and reciprocates. Reciprocating operation is possible, and the valve body 14 can be fixed.

As the structure for rotating and reciprocating the fuel injection cylinder 5, the first operation member, the second operation member, the operation member, etc. described in the first to tenth embodiments are used as they are. 5 can be easily implemented, and illustration and description are omitted. Even with such a configuration, the first embodiment ~
The same effects as in the tenth embodiment can be obtained.

(Twelfth Embodiment) In the first to eleventh embodiments, the cylindrical portion 18 is provided outside the injection cylinder 8. However, a rod-shaped body is provided instead of the cylindrical portion 18, and the rod-shaped body is provided. May be inserted inside the injection cylinder 8 so as to reciprocate and rotate freely. In this case, it is a matter of course that an open / close surface is provided at the end of the rod-shaped body. With this configuration, the same effects as those of the first to eleventh embodiments can be obtained.

The flow control valves of the first to tenth embodiments can be applied not only to the carburetor of the internal combustion engine but also to various industrial equipment such as machine tools and power transmission devices. Further, the flow direction of the fluid may be a flow control valve configured to be transferred from the flow path side to the fluid transfer path side in addition to the case where the fluid is transferred from the fluid transfer path to the flow path.

[0067]

According to the first aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis, and communicating with the fluid transport path and the flow path. A fluid transport cylinder having a longitudinal slit along the axis; and a valve element provided in the valve box and provided in contact with either the inside or the outside of the fluid transport cylinder. The fluid transport cylinder and the valve body are relatively rotatable and relatively movable along the axis, and the valve body is provided with an opening / closing surface that is non-perpendicular to the axis, A first operation portion rotatably provided outside the box is connected to one of the valve body and the fluid transport cylinder, and a rotatable second operation member is provided outside the valve box; Alternatively, one of the valve bodies and the second operation member are brought into contact with each other, and the rotation of the second operation member is performed. Ri one of said fluid transport tube or the valve body is provided an operating member for moving along said axis.

When the first operation section is rotated, either the valve body or the fluid transport cylinder is rotated, and the slit is opened and closed.
When the second operating portion is rotated, the rotation is converted into a linear motion along the axis of the operating member, and the fluid transport cylinder or the valve moves along the axis by this linear motion to open and close the slit. The amount of operation is subdivided by a series of motion conversions, and the operation rate of the valve body is smaller than the operation rate of the second operation unit. Therefore, the degree of opening and closing of the slit can be finely adjusted, and an appropriate flow rate control operation can be performed.

According to a second aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve body, and is provided with an operation rod rotatably provided outside the valve box, other than the valve body. Connect to the end,
While providing a screw hole parallel to the axis in the valve box,
A screw member was screwed into the screw hole, and the tip of the shaft of the screw member was in contact with the other end of the valve body.

When the operating rod is rotated, the valve body rotates, and the slit is opened and closed. When the screw member is rotated, it is converted into a linear motion along the screw hole, and the linear motion moves the valve element along the axis to open and close the slit.

When the rotation of the screw member is converted into a linear motion, the rotation is subdivided in accordance with the pitch of the screw holes, and the operation rate of the valve body is smaller than the operation rate of the second operating portion. The degree of opening and closing can be finely adjusted, and an appropriate flow control operation can be performed.

According to a third aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
An operation in which a cam plate having an inclined surface is rotatably provided outside the valve box, a hole is provided in the valve box in parallel with the axis, and the hole comes into contact with the other end of the valve body and the inclined surface. A bar was operably disposed along the axis.

When the operating rod is rotated, the valve body rotates, and the slit is opened and closed. When the cam plate is rotated, the operating rod linearly moves along the inclined surface, and the linear movement moves the valve element along the axis to open and close the slit.

The amount of actuation is subdivided by a series of motion conversions, and the actuation rate of the valve body is smaller than the actuation rate of the cam plate, so that the degree of opening and closing of the slit can be finely adjusted and an appropriate flow rate control operation can be performed. .

According to a fourth aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
A cam plate having an inclined surface is provided outside the valve box so as to be movable orthogonally to the axis, a hole is provided in the valve box in parallel with the axis, and the other end of the valve body and the hole are provided in this hole. An operating rod in contact with the inclined surface is operably arranged along the axis, and one end of the cam plate is in contact with a tip of a shaft portion of a screw member screwed into a screw hole orthogonal to the axis.

When the operating rod is rotated, the valve body rotates, and the slit is opened and closed. When the screw member is rotated, the cam plate operates orthogonally to the axis, and the operating rod moves linearly along the inclined surface of the cam plate. With this linear motion, the valve moves along the axis and the slit opens and closes. Is done.

The amount of actuation is subdivided by a series of motion conversions, and the actuation rate of the valve element is smaller than the actuation rate of the screw member, so that the degree of opening and closing of the slit can be finely adjusted and an appropriate flow rate control operation can be performed. .

According to a fifth aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
A rotary shaft orthogonal to the axis is provided from outside to inside of the valve box, and a cam plate is provided on the rotary shaft to abut on the other end of the valve body.

When the operating rod is rotated, the valve body rotates, and the slit is opened and closed. When the rotating shaft rotates, the cam plate rotates,
The valve element moves along the axis to open and close the slit. The amount of actuation is subdivided by a series of motion conversions, and the actuation rate of the valve body is smaller than the actuation rate of the rotary shaft. Therefore, the degree of opening and closing of the slit can be finely adjusted, and an appropriate flow control operation can be performed.

According to a sixth aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
A rotatable cam plate is provided outside the valve box, a hole parallel to the axis is provided in the valve box, and an operating rod abutting on the other end of the cam plate and the valve body is provided in the hole. It was operably arranged along.

When the operating rod is rotated, the valve body rotates and the slit is opened and closed. When the cam plate is rotated, the operating rod moves linearly, the valve body moves along the axis, and the slit is opened and closed.

The amount of actuation is subdivided by a series of motion conversions, and the actuation rate of the valve body is smaller than the actuation rate of the cam plate, so that the degree of opening and closing of the slit can be finely adjusted and an appropriate flow rate control operation can be performed. .

According to a seventh aspect of the present invention, there is provided a valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis.
A fluid transport cylinder communicating with the fluid transport path and the flow path, and having a longitudinal slit along the axis, and provided on the valve box and provided in contact with the outside of the fluid transport cylinder. Having a cylindrical valve body, the valve body is rotatable, and
An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connect to the end,
An external thread concentric with the axis is provided on the outer periphery of the valve box, a holder having a female screw meshing with the external thread is provided outside the valve box, and a hole parallel to the axis is provided in the valve box. An operating rod abutting on the other end of the holder and the valve body is operably disposed in the hole along the axis.

When the operating rod is rotated, the valve body rotates, and the slit is opened and closed. When the holder is rotated, the operating rod moves linearly, the valve body moves along the axis, and the slit is opened and closed. The amount of operation is subdivided according to the pitch of the male and female threads in the rotation of the holder, and the operating rate of the valve body is smaller than the operating rate of the holder. A simple flow control operation can be performed.

In the invention according to claim 8, since the plurality of slits are provided along the circumferential direction of the fluid transport cylinder, any one of the second operating member, the screw member, the cam plate, the rotating shaft, and the holder is provided. When the member is rotated, the opening / closing amount of the slit corresponding to the unit rotation amount increases / decreases.

For this reason, in addition to the effects of the inventions described in claims 1 to 7, the opening / closing characteristics of the slit can be changed.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a flow control valve according to a first embodiment.

FIG. 2 is a side sectional view taken along line BB in FIG.

FIGS. 3A, 3B, and 3C are front views showing the operation of the flow control valve of FIG. 1;

FIG. 4 is a front sectional view showing a main part of a flow control valve according to a second embodiment.

FIG. 5 is a front sectional view showing a main part of a flow control valve according to a third embodiment.

FIG. 6 is a front sectional view showing a main part of a flow control valve according to a fourth embodiment.

FIG. 7 is a front sectional view showing a main part of a flow control valve according to a fifth embodiment.

FIG. 8 is a front sectional view showing a main part of a flow control valve according to a sixth embodiment.

FIG. 9 is a front sectional view showing a main part of a flow control valve according to a seventh embodiment.

FIGS. 10A to 10E are front views showing the main parts of a flow control valve according to an eighth embodiment.

FIGS. 11A to 11E are front views showing a main part of a flow control valve according to a ninth embodiment.

FIGS. 12A and 12B are front views showing a main part of a flow control valve according to a tenth embodiment.

FIG. 13 is a front sectional view of a conventional flow control valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 3 Flow path 5 Fuel injection cylinder 9 Fluid transport path 10 Slit 13 Screw hole 14 Valve element 19 Opening / closing surface 20 Operation rod 22 Screw member C axis

Claims (8)

(57) [Claims] 1. A valve box having a flow path, provided on the valve box, a fluid transport path along an axis, and communicating with the fluid transport path and the flow path, and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a valve body provided on the valve box and provided in contact with either the inside or the outside of the fluid transport cylinder, wherein the fluid transport cylinder and The valve body is configured to be relatively rotatable and relatively movable along the axis, the valve body is provided with an opening / closing surface that is non-perpendicular to the axis, and is provided rotatably outside the valve box. The first operating unit is connected to one of the valve body and the fluid transport cylinder, and a rotatable second operating member is provided outside the valve box, and either the fluid transport cylinder or the valve body is provided. And abuts the second operating member, and the fluid transport cylinder or Is a flow control valve provided with an operating member for moving one of the valve bodies along the axis. 2. A valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis, and communicating with the fluid transport path and the flow path and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a tubular valve element provided in the valve box and provided in contact with the outside of the fluid transport cylinder, the valve element is rotatable, and An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connected to the end, a screw hole parallel to the axis is provided in the valve box, a screw member is screwed into the screw hole, and the tip of the shaft of the screw member abuts on the other end of the valve body. A flow control valve. 3. A valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis, and communicating with the fluid transport path and the flow path and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a tubular valve element provided in the valve box and provided in contact with the outside of the fluid transport cylinder, the valve element is rotatable, and An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. A cam plate connected to the end and having an inclined surface outside the valve box is rotatably provided, a hole parallel to the axis is provided in the valve box, and the other end of the valve body and the inclined surface are provided in this hole. A flow control valve, characterized in that an operating rod abutting on the shaft is operably arranged along the axis. 4. A valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis, and communicating with the fluid transport path and the flow path and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a tubular valve body provided in the valve box and provided in contact with the outside of the fluid transport cylinder, the valve body is rotatable, and An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. A cam plate connected to an end and having an inclined surface outside the valve box is provided movably perpendicular to the axis, a hole parallel to the axis is provided in the valve box, and the valve body is provided in this hole. The other end of the cam plate is operably disposed along the axis with the operating rod in contact with the inclined surface, and a screw orthogonal to the axis at one end of the cam plate. A flow control valve characterized in that a tip of a shaft portion of a screw member screwed into a hole abuts. 5. A valve box having a flow path, provided in the valve box, a fluid transport path along an axis, communicating with the fluid transport path and the flow path, and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a tubular valve element provided in the valve box and provided in contact with the outside of the fluid transport cylinder, the valve element is rotatable, and An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. A flow axis, which is connected to an end of the valve box and extends perpendicularly to the axis from the outside to the inside of the valve box, and a cam plate is provided on the rotation axis to abut on the other end of the valve body. Control valve. 6. A valve box having a flow path, provided in the valve box, a fluid transport path along an axis, and communicating with the fluid transport path and the flow path, and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a tubular valve element provided in the valve box and provided in contact with the outside of the fluid transport cylinder, the valve element is rotatable, and An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. An operation is provided in which a rotatable cam plate is provided outside the valve box and connected to the end, a hole parallel to the axis is provided in the valve box, and the hole comes into contact with the other end of the cam plate and the valve body. A flow control valve, wherein a rod is operably arranged along the axis. 7. A valve box having a flow path, a fluid transport path provided in the valve box and extending along an axis, and communicating with the fluid transport path and the flow path and extending along the axis. A fluid transport cylinder having a longitudinal slit, and a tubular valve element provided in the valve box and provided in contact with the outside of the fluid transport cylinder, the valve element is rotatable, and An operating rod that is configured to be movable along the axis, has an opening / closing surface that is non-perpendicular to the axis at one end of the valve element, and an operating rod that is rotatably provided outside the valve box is provided in addition to the valve element. Connected to the end, an external thread concentric with the axis is provided on the outer periphery of the valve box, and a holder having a female screw meshing with the external thread is provided outside the valve box. It is characterized in that a hole is provided, and an operating rod in contact with the holder and the other end of the valve body is operably disposed along the axis in the hole. Flow control valve. 8. The flow control valve according to claim 1, wherein a plurality of the slits are provided along a circumferential direction of the fluid transport cylinder.