JP5991810B2 - VALVE DEVICE MANUFACTURING METHOD AND VALVE DEVICE - Google Patents

Description

  The present invention relates to a valve device that closes one end of a tubular body in a valve-closed state.

  There is a backflow prevention valve that is pivotably assembled by fitting a shaft portion provided with a valve body and a valve body on one of them to a bearing portion provided on the other. (See Patent Document 1) In this Patent Document 1, the bearing portion has a substantially cylindrical shape having a size corresponding to the outer diameter of the shaft portion, and a slit shape formed in the cylindrical axial direction. The outer peripheral portion of the shaft portion is inserted into the inside through this opening and is fitted. In this Patent Document 1, the regular rotation of the valve body is ensured only by the bearing portion and the shaft portion, and if there is a clearance between the two, the rotation of the valve body is rattled. It was something that would cause it.

Japanese Patent Laid-Open No. 11-59205

The main problem to be solved by the present invention is that the valve body of this type of valve device is in a state in which the backlash is minimized with respect to the base supporting the valve body without complicating the structure of the valve device. It is in the point which can be combined.

In order to achieve the above object, according to the present invention, a valve device is provided with a base provided with a mounting portion for a tubular body,
And a valve body that is combined with the base so as to be rotatable, and has a lid portion that closes one end of the tubular body at a position before the rotation,
The base and the valve body are combined with a shaft provided on one of them in a bearing provided on the other,
The base is provided with a guide portion that slidably contacts the sliding contact portion of the valve body and cooperates with the shaft portion to regularly rotate the valve body.

  By doing in this way, even when there is a dimensional difference between the shaft portion and the bearing portion, the valve body can be rotated regularly without rattling, and the valve body can be moved from the opened state to the position before the rotation. When returning to the above, one end of the tube can be appropriately closed by the lid of the valve body.

  Therefore, it is significant that the base and the valve body are molded in a state in which the shaft portion is accommodated in the bearing portion by a mold constituent member movable in the axial direction of the shaft portion. One of such embodiments.

  One of the preferred embodiments of the present invention is that the guide portion is slidably contacted with the slidable contact portion at least within a range in which the valve body is rotated by a predetermined angle from the position before rotation. Further, in the pre-rotation position, it is one of preferred embodiments of the present invention that the shaft portion is in contact with the inner wall of the bearing portion and the guide portion is in contact with the sliding contact portion.

  In addition, one of the guide portion and the sliding contact portion has a convex shape, and the other of them has a concave shape that accepts one of the convex shapes. The movement of the valve body may be restricted. In this case, backlash of the valve body in the axial direction of the shaft portion can be minimized.

  Moreover, it is set as one of the preferable aspects of this invention that the valve body is positioned in the position before rotation by its own weight. Further, the valve device may be provided with an urging means for storing an urging force against the valve body by turning from the position before the valve body is turned. In this case, the state where the lid portion of the valve body closes one end of the tube body can be more reliably created and stably maintained by the urging force of the urging means.

  According to the present invention, the valve body in the valve device can be combined with the base that supports the valve body in a state in which the backlash is minimized, without complicating the structure of the valve device.

FIG. 1 is a side view showing a state in which a valve device (first example) according to an embodiment is attached to a pipe body, and the valve body is in a valve open state. FIG. 2 is a side view showing a state in which the valve device of the first example is attached to the pipe body, and the valve body is in a closed state. FIG. 3 is a cross-sectional view of the state of FIG. 4 is a cross-sectional view of the state of FIG. FIG. 5 is a perspective view showing the base and the valve body constituting the valve device of the first example separately. FIG. 6 is a side view of the valve device of the first example. FIG. 7 is a plan view of the valve device of the first example. 8 is a cross-sectional view taken along line AA in FIG. FIG. 9 is a front view of the valve device of the first example. FIG. 10 is a rear view of the valve device of the first example. FIG. 11 is a cross-sectional view of the main part at the BB line position in FIG. 12 is a cross-sectional view taken along the line CC in FIG. FIG. 13 is a side view of the valve device (second example) according to the embodiment. FIG. 14 is a plan view of the valve device of the second example. FIG. 15 is a rear view of the valve device of the second example. FIG. 16 is a cross-sectional view of the main part at the DD line position in FIG. FIG. 17 is a cross-sectional view taken along line EE in FIG.

  Hereinafter, typical embodiments of the present invention will be described with reference to FIGS. The valve device V according to this embodiment closes one end of the pipe body P in the closed state. In the illustrated example, the valve device V opens the lower end Pa when the fluid flows out from the lower end Pa of the tubular body P with the lower end Pa open, and the lower end Pa when the outflow stops. It can be used as a backflow prevention valve for fuel or the like. Such a valve device V is formed by combining a base 1 and a valve body 2.

  The base 1 includes an attachment portion 10 and a shaft portion 11 for the tube body P. In the illustrated example, the base 1 has a rectangular plate-like portion 12, the attachment portion 10 on one surface side of the rectangular plate-like portion 12, and the shaft portion 11 on the other surface side.

  In the illustrated example, the attachment portion 10 is configured as a hollow body protruding from the center of the rectangular plate-like portion 12. The mounting portion 10 has a substantially rectangular cross-sectional outline in a direction perpendicular to the protruding direction. Further, engaging claws 10a are formed on the side portions facing each other across the center of the attachment portion 10, respectively. And in this embodiment, it is an attachment part from the outer side of the tubular body P with respect to the attachment hole Pb which followed the said cross-sectional outline shape of the attachment part 10 formed in the side part by the side of the lower end Pa of the tubular body P. When 10 is inserted, the pair of engaging claws 10a and 10a are elastically deformed in contact with the edge of the mounting hole Pb to allow this insertion, and the insertion of the rectangular plate-like portion 12 in contact with the outer surface of the tube P is completed. The engaging claw 10a is elastically restored at the position, and is caught in the mounting hole Pb inside the tube body P. (FIG. 3, FIG. 4, FIG. 9) Thereby, in this embodiment, the valve device V can be attached to the lower end Pa portion of the tubular body P with one touch. In the illustrated example, protrusions 120 are formed on both sides of the rectangular plate-like portion 12 along the length direction of the tubular body P, and the rectangular plate-like portion 12 has a circular cross-sectional shape in the attached state. On the other hand, the protrusions 120 are in contact with each other at two positions on the left and right sides of the mounting portion 10. In addition, the attachment part 10 is sufficient as long as it has a structure that can be attached to the tubular body P, and is not limited to the structure shown in the figure.

  In the illustrated example, the shaft portion 11 has a cylindrical shape, and is formed at two positions on the left and right sides on the other surface side of the rectangular plate-like portion 12. In the illustrated example, a direction perpendicular to the other surface of the rectangular plate-like portion 12 is set such that a wall surface runs along the substantially central portion of both sides of the rectangular plate-like portion 12 where the protrusion 120 is formed. A side wall portion 121 is formed so as to protrude from the side. The outer wall surface of the side wall 121 is flush with the side. The shaft portion 11 projects in a direction perpendicular to the outer surface, with one end of the shaft integrally connected to the outer surface of the side wall portion 121. The center line of the left and right shaft portions 11 forms part of the same virtual straight line (indicated by symbol x in FIG. 5, hereinafter referred to as the first straight line). The center line of the left and right shaft portions 11 does not necessarily have to be part of the same virtual straight line.

  On the other surface side of the rectangular plate-like part 12, between the left and right side wall parts 121, 121, intersects the first straight line x at the center of the rectangular plate-like part 12 at right angles to the first straight line x. A central wall 122 is formed along an imaginary straight line (indicated by reference numeral x ′ in FIG. 5, hereinafter referred to as a second straight line). The central wall portion 122 has a protruding dimension from the rectangular plate-like portion 12, that is, a height larger than that of the side wall portion 121.

  Of the wall upper end 122a of the central wall 122, the position where the first straight line x and the second straight line x ′ intersect, and the wall side end directed downward in the state of attachment to the tubular body P in the central wall 122 The portion positioned between the two portions 122b is formed so as to substantially follow an arc of a virtual circle (not shown) surrounding the shaft center line of the shaft portion 11 with the shaft portion 11 as a center. Yes. In the illustrated example, the wall upper end 122a and the wall side end 122b function as a guide portion 13 described later.

  Further, in the illustrated example, the left and right side wall portions 121 and 121 and the central wall portion 122 are respectively the same height as the side wall portion 121 and the reinforcing wall portions formed along the first straight line x. 123 is integrated.

  On the other hand, the valve body 2 has a bearing portion 20 of the shaft portion 11 of the base 1 and is rotatably combined with the base 1 and closes the lower end Pa of the tubular body P at a position before the rotation. A lid 21 is provided.

  In the illustrated example, the valve body 2 includes the lid portion 21, a base portion 22 on which the bearing portion 20 is formed, and an arm portion 23 that connects the base portion 22 and the lid portion 21.

  The lid portion 21 of the valve body 2 has a disk shape and has a size capable of closing the lower end Pa of the tubular body P. That is, the lid 21 is configured so that one surface thereof is in close contact with the lower end Pa of the tubular body P at the position before the rotation.

  The base portion 22 extends between the short side 22a positioned below, the long side 22b positioned above the short side 22a, the short side 22a and the long side 22b, and the middle in the vertical direction at the position before the rotation. Are formed in the shape of a mountain plate having left and right side sides 22c and 22c inclined downward from the position by the dimensional difference between the short side 22a and the long side 22b. It is integrated. The left bearing portion 20 has an outer peripheral portion integrally connected to the left end of the long side 22 b of the base portion 22, and the right bearing portion 20 has an outer peripheral portion integrally connected to the right end of the long side 22 b of the base portion 22. The left side wall 121 of the base 1 is positioned inside the left bearing 20 and the shaft 11 is accommodated in the bearing 20, and the base 1 is placed inside the right bearing 20. The valve body 2 and the base 1 are combined in a state where the right side wall portion 121 is positioned and the shaft portion 11 is accommodated in the bearing portion 20.

  One end of the arm portion 23 is integrally connected to the center of the other surface of the lid portion 21, and the other end of the arm portion 23 is located at the center position of the short side 22 a on the one surface side of the base portion 22 that is directed downward at the position before the rotation. Are connected together. The length direction of the arm portion 23 is orthogonal to one surface of the base portion 22, whereby the valve body 2 has a lever shape as a whole in a side view.

  In the middle of the left and right bearings 20, 20 in the valve body 2, in the illustrated example, at the center of the long side 22 b of the base 22, the short side 22 a side is opened on both sides of the base 22 and on the long side 22 b side. A recess 22d is formed in the recess. The left-right dimension of the recess 22d is slightly larger than the thickness of the central wall portion 122 of the base 1, and the central wall is located in the recess 22d within a range in which the valve body 2 rotates by a predetermined angle from the position before rotation. The portion 122 is accommodated, and the inner back portion of the recess 22d is slid on the guide portion 13 which is a portion formed so as to substantially follow an arc of a virtual circle centering on the shaft portion 11 in the central wall portion 122. It comes to be touched. In this embodiment, the inner back portion of the recess 22d functions as a sliding contact portion 24 with respect to the guide portion 13. That is, in this embodiment, the guide portion 13 has a convex shape, and the sliding contact portion 24 has a concave shape that receives the convex guide portion 13.

  In this embodiment, the sliding contact portion 24 of the valve body 2 slidably contacted in this way and the guide portion 13 of the base 1 cooperate with the shaft portion 11 to rotate the valve body 2. The movement is made regular.

  That is, in this embodiment, the inner diameter of the bearing portion 20 of the valve body 2 is larger than the outer diameter of the shaft portion 11 of the base 1, but the valve body 2 is rotated by a predetermined angle from the pre-rotation position. In the moving range, the shaft portion 11 is in contact with the inner wall of the bearing portion 20, and the sliding contact portion 24 is in contact with the guide portion 13 on the outside of the shaft portion 11. (Figure 2)

  Thereby, in this embodiment, even when there is a dimensional difference between the shaft portion 11 and the bearing portion 20, the valve body 2 can be rotated regularly without rattling. When the valve returns from the valve-opened state to the pre-rotation position, the lower end Pa of the tubular body P can be appropriately closed by the lid portion 21 of the valve body 2. Further, in this embodiment, the guide portion 13 has a convex shape and the sliding contact portion 24 has a concave shape for receiving it, so that the valve body in the axial direction of the shaft portion 11 by the cooperation of the both. The movement of 2 is restricted, and the play in this direction is minimized.

  In the illustrated example, a mold component such as a slide core (not shown) that moves the base 1 and the valve body 2 in the axial direction of the shaft portion 11 between the bearing portion 20 and the shaft portion 11 is omitted. ), The inner diameter of the bearing portion 20 and the outer diameter of the shaft portion 11 are set so that a gap can be formed in a state where the shaft portion 11 is housed in the bearing portion 20. Further, the outer surface of the side guide portion 13 of the base 1 and the inner surface of the bearing portion 20 of the valve body 2 are also formed by mold constituent members that are movable in a direction orthogonal to the axial direction of the shaft portion 11. Therefore, if the sliding contact portion 24 and the guide portion 13 are not provided, the valve body 2 may be rattled when rotating in the direction intersecting the axial direction of the shaft portion 11 of the base 1 and in the axial direction. Such rattling is suppressed by the guide unit 13. As a result, in this embodiment, the base 1 and the valve body 2 can be molded simultaneously as a synthetic resin injection-molded product without hindrance.

  In the first example shown in FIGS. 1 to 12, the valve element 2 is positioned at the pre-rotation position by its own weight. That is, in this first example, the center of gravity of the valve body 2 at the position before the rotation of the valve body 2 is the side opposite to the lower end Pa side of the tubular body P across the virtual vertical line y passing through the shaft portion 11. It is supposed to be located in. (Figure 2)

  The second example shown in FIGS. 13 to 17 is further provided with a biasing means 3 for storing a biasing force against the valve body 2 by the rotation of the valve body 2 from the position before the rotation.

  In the second example, a space 123 a for accommodating the winding portion 31 of the torsion coil spring 30 is formed on one of the reinforcing wall portions 123 formed on the left and right sides of the central wall portion 122 of the base 1. The void 123a is open on the side directed downward in the attached state, and is configured so that the winding portion 31 can be fitted therein through the open portion. A fastening portion 122c of the spring one end 32 drawn from the winding portion 31 of the spring 30 is formed on the side surface of the central wall portion 122 below the open portion of the void 123a. In addition, a slit 123b communicating with the space 123a is formed at the upper end of the reinforcing wall 123, and the winding of the spring 30 drawn through the slit 123b to the long side 22b of the base 22 of the valve body 2 is formed. A fastening portion 22e of the spring other end 33 pulled out from the portion 31 is formed. And in this 2nd example, the winding part 31 of this spring 30 is elastically deformed by the rotation from the position before rotation of the said valve body 2, and the direction which returns the valve body 2 to the position before rotation is carried out. An urging force is stored in the spring 30. That is, in the illustrated example, the spring 30 functions as the biasing means 3.

  In this second example, the state in which the lid portion 21 of the valve body 2 closes the lower end Pa of the tubular body P can be more reliably created and stably maintained by the urging force of the urging means 3. It has become.

  In the example described above, the shaft portion 11 is provided on the base 1 and the bearing portion 20 is provided on the valve body 2. However, the bearing portion is provided on the base 1 and the shaft portion is provided on the valve body 2. You can also. In this case, typically, the shaft portion is provided so as to protrude outward on the left and right sides of the valve body 2, and the formation portion of the shaft portion of the valve body 2 is located between the left and right walls formed on the base 1. Bearing portions that are accommodated and accommodate the shaft portions on the sides corresponding to the left and right walls are provided.

P pipe body 1 base 10 mounting portion 11 shaft portion 13 guide portion 2 valve body 20 bearing portion 21 lid portion 24 sliding contact portion

Claims (10)

A base with an attachment to the tube,
And a valve body that is combined with the base so as to be rotatable, and has a lid portion that closes one end of the tubular body at a position before the rotation,
The base and the valve body are combined by putting a shaft portion provided on one of them into a bearing portion provided on the other,
A gap between the bearing portion and the shaft portion that allows the base and the valve body to be molded in a state where the shaft portion is housed in the bearing portion by a mold component such as a slide core that can move in the axial direction of the shaft portion. The inner diameter of the bearing portion and the outer diameter of the shaft portion are set so that
Moreover, the base, characterized in that it is provided with a guide portion for the rotation of the valve body and the regular ones in sliding contact with the sliding contact portion of the valve body cooperates with the shaft portion A method for manufacturing a valve device . 2. The method for manufacturing a valve device according to claim 1 , wherein the guide portion is configured to be in sliding contact with the sliding contact portion at least in a range in which the valve body rotates by a predetermined angle from a position before rotation . One of the guide portion and the sliding contact portion has a convex shape, and the other of these has a concave shape that accepts one of the convex shapes, so that the movement of the valve body in the axial direction of the shaft portion is regulated by their cooperation. The method for manufacturing a valve device according to claim 1 or 2 , wherein: The method for manufacturing a valve device according to any one of claims 1 to 3 , wherein the valve body is positioned at a position before rotation by its own weight . The valve according to any one of claims 1 to 4, further comprising an urging unit that accumulates an urging force with respect to the valve body by turning the valve body from a position before turning. Device manufacturing method.   A base with an attachment to the tube,
  And a valve body that is combined with the base so as to be rotatable, and has a lid portion that closes one end of the tubular body at a position before the rotation,
  The base and the valve body are combined with a shaft provided on one of them in a bearing provided on the other,
  The base is provided with a guide portion that slidably contacts the sliding contact portion of the valve body and cooperates with the shaft portion to regularly rotate the valve body,
  In addition, the valve device is characterized in that, in the pre-rotation position, the shaft portion is in contact with the inner wall of the bearing portion, and the guide portion is in contact with the sliding contact portion.   The valve device according to claim 6, wherein the guide portion is configured to be in sliding contact with the sliding contact portion at least within a range in which the valve body is rotated by a predetermined angle from the position before rotation.   One of the guide portion and the sliding contact portion has a convex shape, and the other of these has a concave shape that accepts one of the convex shapes, so that the movement of the valve body in the axial direction of the shaft portion is regulated by their cooperation. The valve device according to claim 6 or 7, wherein the valve device is configured as described above.   The valve device according to any one of claims 6 to 8, wherein the valve body is positioned at a position before rotation by its own weight.   The valve according to any one of claims 6 to 9, further comprising an urging unit that accumulates an urging force with respect to the valve body by rotating the valve body from a position before the rotation. apparatus.

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