JP6134596B2 - Pressure resistant cock - Google Patents

Description

  The present invention relates to a pressure-resistant cock that opens and closes when an appropriate amount of carbonic acid solution or the like is discharged from a container body.

  As a pressure-resistant cock that opens and closes a container body filled with a carbonic acid solution or the like, a metal cock is conventionally known. Unlike mere liquid cocks that do not contain carbonic acid, the pressure-resistant cocks seal not only the outlet from which liquid is discharged, but also the handle side, which is the opposite side of the outlet, because the internal pressure of carbonic acid is applied to the cock. It is desirable to ensure. Otherwise, the liquid will be ejected from the vicinity of the handle by the internal pressure. An example of a more specific configuration of the metal cock is a screw type, and when the handle is rotated, the valve stem moves forward or backward according to the direction of rotation, and the tip of the valve stem is positioned around the outlet. There are those that open and close the outlet by close or spaced apart from the valve seat. Further, an O-ring is fitted on the valve stem on the side opposite to the outlet (the handle side), and the O-ring ensures sealing performance against the internal pressure of carbonic acid.

  However, it seems that the pressure-resistant cock made of resin did not exist until now because the rigidity is inferior to metal. Incidentally, as an example of a resin cock, a fitting plate part A attached to the mouth of the container body, a cylindrical part B communicating with the fitting plate part A, and a cap-like rotating part screwed onto the outer peripheral surface of the cylindrical part B What consists of C and the plunger D inserted by the inside of the cylinder part C is known (patent document 1). By operating the rotating part C, the resin cock reciprocates linearly with the rotating part C while rotating the plunger D with respect to the cylindrical part B. The outer peripheral surface and the inner peripheral surface 26 of the cylindrical part B slide in close contact with each other. And when closing the opening part 23 which is what is called an exit of the lower end of the cylinder part B, the inner and outer peripheral surfaces of the opening part 23 and the closing part 43 which is the front-end | tip part of the plunger D are closely_contact | adhered. Numbers such as A to D and 23 are symbols used in Patent Document 1.

JP 2010-76768

  However, the resin cock described above cannot be said to have sufficient sealing performance on the side opposite to the outlet and is not suitable for use as a pressure-resistant cock. That is, on the side opposite to the outlet, the outer peripheral surface of the shaft portion 41 of the plunger D slides linearly in a direction away from or approaching the outlet while being in close contact with the inner peripheral surface of the cylindrical portion B. Therefore, it is difficult to say that the sealing performance is sufficient. In addition, since the internal pressure by carbonic acid is applied to the plunger D, when the plunger D is in the state of closing the outlet, the plunger D is also prevented from moving away from the outlet, so that it does not come off from the cylindrical portion B. High is desired for resin cocks.

  The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a pressure-resistant cock made of resin that can ensure sealing performance against the internal pressure of carbonic acid.

The present invention includes a cap body attached to a mouth portion of a container, and a resin cap having a discharge pipe extending in a direction intersecting a penetrating direction of a through hole formed in a closing plate that narrows the diameter of the cap body; A cylindrical rotary shaft that is housed in a sealed space on one side of the intersection with respect to the penetration direction of the through hole in the discharge pipe, a handle body that rotates the rotary shaft outside the discharge pipe, and an internal space of the rotary shaft is closed on the handle body side A resin handle having a bottom plate, and a valve rod in which a base end portion is accommodated in a rotation shaft, and a valve rod having a tip portion disposed in a flow path opposite to the sealed space in the discharge pipe And a resin plug. Then, as a bearing portion that rotatably supports the rotating shaft, an annular concave groove over the entire circumference is provided on the inner peripheral surface of the discharge pipe, and an annular convex ring that fits into the concave groove is provided on the outer peripheral surface of the rotary shaft. Prepare. The inner and outer peripheral surfaces of the valve stem and the rotary shaft are provided with a threaded portion that transmits the rotation of the handle body, and as a conversion mechanism that converts the rotary motion of the handle body into the linear reciprocating motion of the valve stem in the discharge pipe, A rail parallel to the axial direction and a slider that moves along the rail are provided separately on the inner and outer peripheral surfaces of the discharge pipe and the valve stem of the stopper. The discharge pipe is provided with a valve seat portion that narrows the inner diameter of the outlet of the flow path, and a valve portion that can be brought into close contact with the valve seat portion at the tip of the valve stem of the plug. The discharge pipe and the inner and outer peripheral surfaces of the rotary shaft on the flow path side with respect to the bearing portion are provided with a plurality of seal surface portions that are in close contact with each other in the circumferential direction at positions separated in a direction parallel to the axial direction. Assuming

Further, the plurality of seal surface portions may be formed only on the inner and outer peripheral surfaces of the discharge pipe having a simple cylindrical inner peripheral surface without a step and the rotation shaft having a simple cylindrical outer peripheral surface without a step. . However, when the discharge pipe and the rotary shaft are in close contact with each other, the seal pipe is slightly deformed by the elasticity of the resins. Accordingly, when a plurality of seal surface portions are provided, deformation of one seal surface portion may affect the closeness of other seal surface portions. In order to reduce this fear as much as possible, it is desirable to do the following.
That is, the discharge pipe is provided with a stepped cylindrical inner peripheral surface having a small diameter portion facing both the flow path and the sealed space and a large diameter portion facing only the sealed space, and the rotating shaft is the outer peripheral surface. Is provided with a cylindrical rotating shaft main body and a flange portion projecting over the entire circumference in the circumferential direction on the handle side of the tip of the rotating shaft main body, and the seal surface portion includes a small diameter portion of the discharge pipe and the rotating shaft main body. A first seal surface portion that is in close contact with the inner and outer peripheral surfaces of the front end portion, and a second seal surface portion that is in close contact with the inner and outer peripheral surfaces of the large-diameter portion and the flange portion of the discharge pipe.

Further, resin sink marks when forming the rotating shaft are the outer peripheral surface of the distal end portion of the rotating shaft main body constituting a part of the first seal surface portion and the outer peripheral surface of the flange constituting a part of the second seal surface portion. In order to improve the sealing performance without affecting the above, it is desirable to do as follows.
That is, the boundary surface where the outer peripheral surface of the tip end portion of the rotating shaft main body and the outer peripheral surface of the flange portion are continuous has a tapered shape that gradually increases in diameter toward the outer peripheral surface side of the flange portion.

One of the rail and slider as the conversion mechanism may be provided on the inner peripheral surface of the discharge pipe and the other on the outer peripheral surface of the valve stem of the plug. In order to increase the area where the valve seat portion and the valve portion are in close contact with each other, it is desirable to do the following.
That is, as the conversion mechanism portion, a rail is provided on the inner peripheral surface of the discharge pipe and a slider is provided on the outer peripheral surface of the valve stem of the plug body, and the valve portion extends from the outer peripheral surface of the tip portion of the valve stem to the entire circumference in the circumferential direction. And a concave portion through which the rail passes.

  According to the present invention, even when the handle is turned, the position of the rotary shaft in the discharge pipe in the axial direction is constant by the bearing portion of the annular concave groove and the convex ring that are fitted to each other. The position in the axial direction of the seal surface portion with the discharge pipe is also constant. Accordingly, the sealing performance is improved as compared with the case where the axial position of the sealing surface portion moves. In addition, since a plurality of seal surface portions are provided, the sealing performance is improved as compared with the case of one seal surface portion. Moreover, even if the internal pressure of the container body is applied to the rotating shaft, the bearing portion is formed by the concave groove and the convex ring that are fitted to each other, so that the bearing portion functions to prevent the rotating shaft from being detached. Therefore, the present invention can be said to be a resin-made pressure-resistant cock capable of ensuring sealing performance against the internal pressure of carbonic acid.

  Further, the discharge pipe has a stepped cylindrical inner peripheral surface, a first seal surface portion in which the inner and outer peripheral surfaces of the small diameter portion of the discharge tube and the tip end portion of the rotary shaft main body are in close contact, and the large diameter portion of the discharge pipe If the inner and outer peripheral surfaces of the flange portion and the flange portion are provided with a second seal surface portion, the closeness between the first seal surface portion and the second seal surface portion is difficult to affect each other, so the sealing performance is improved. can do.

  Further, if the boundary surface where the outer peripheral surface of the tip end portion of the rolling shaft main body and the outer peripheral surface of the flange are continuous has a tapered shape that gradually increases in diameter toward the outer peripheral surface side of the flange, the seal surface portion is formed when the handle is formed. Resin sink marks generated in the vicinity can be absorbed at the boundary surface, and the roundness of the outer peripheral surface of the flange portion serving as the seal surface portion can be prevented from being distorted, and the sealing performance can be improved.

  If the conversion mechanism is provided with a rail on the inner peripheral surface of the discharge pipe, a slider on the outer peripheral surface of the valve stem of the stopper, and a recess through which the rail passes, on the outer peripheral surface of the valve portion, there is no recess. Compared to the shape of the plug, the area of the valve portion that is in close contact with the valve seat portion can be increased, so that the sealing performance is improved.

(A)-(e) is a plan view, a front view, a left side view, a right side view showing a state in which the pressure-resistant cock of the first embodiment of the present invention attached to the mouth of the container body is closed, It is a bottom view. (A) (B) The figure is an AA line cutting section expanded sectional view of Drawing 1, and a BB line cutting section expanded sectional view. (A) (B) The figure is the CC line cutting part expanded sectional view of FIG. 1, and the DD line cutting part enlarged sectional view. It is a top view which shows the state which the pressure-proof cock of 1st Embodiment attached to the opening | mouth part of a container main body is open. FIGS. 4A and 4B are enlarged sectional views of the pressure resistant cock in the state of FIG. 4 (a state where the pressure resistant cock is open), and are an enlarged sectional view taken along line AA in FIG. It is drawing corresponding to a cutting part expanded sectional view. (A)-(C) is a right side view showing a cap, a sectional view taken along line AA, and a sectional view taken along line BB. (A)-(D) is a front view showing a handle, a plan view, a right side view, and a cross-sectional view taken along line AA. (A) to (f) are a plan view, a front view, a left side view, a sectional view taken along line AA, an enlarged sectional view taken along line BB, and an enlarged sectional view taken along line CC. It is sectional drawing. It is a perspective view which shows the assembly state of the pressure | voltage resistant cock of 1st Embodiment. It is a disassembled perspective view of the pressure | voltage resistant cock of 1st Embodiment. It is a perspective view which shows the state which attached the pressure | voltage resistant cock of 1st Embodiment to the container main body.

  The pressure-resistant cock 1 according to the first embodiment of the present invention is an assembly of three parts, as shown in FIGS. 1 to 3 or 10, and a cap 2 attached to the mouth 9 a of the container body 9, and a cap 2. The handle 3 is rotatably supported by the control unit 3 and the plug body 4 opens and closes the outlet 26m of the cap 2 according to the rotation direction in which the handle 3 is rotated. The cap 2, the handle 3, and the plug body 4 are all injection molded products made of resin (synthetic resin), and for example, hard resin, more specifically, polypropylene or polyethylene is used as an example. For the sake of convenience, the direction may be set with reference to FIG.

  As shown in FIGS. 1 to 3 and 6, the cap 2 includes a cap body 21 that is attached to the mouth portion 9 a of the container body 9 and a discharge pipe 25 that has an internal space that communicates with the inside of the cap body 21. .

  The cap main body 21 is concentrically arranged as a cylindrical body on both the radially outer side and the inner side, and the cylindrical outer cylinder 22 and the inner cylinder 23 are connected to the outer cylinder 22 and the inner cylinder 23 at one end in the longitudinal direction of each other. And a closing plate 24. A female screw 22 a is formed on the inner peripheral surface of the outer cylinder 22, and this female screw 22 a is screwed into a male screw 9 b formed on the outer peripheral surface of the mouth portion 9 a of the container body 9. Further, the closing plate 24 is a disk that not only connects the outer cylinder 22 and the inner cylinder 23 but also closes the diameter of one end of the inner cylinder 23, and the disk has a through hole 24 a penetrating in the thickness direction. Is formed. The through hole 24a has a rectangular shape in plan view, and is biased with respect to the center of the disk. More specifically, one end of the rectangular shape of the through hole 24a is located at the center of the disk, and the other end is located at the outer periphery of the disk.

  The discharge pipe 25 includes a cylindrical pipe body 26 extending in a direction intersecting with the penetration direction of the through hole 24a (more specifically, a direction orthogonal thereto), an intermediate portion in the longitudinal direction of the pipe body 26, and the closing plate 24. An annular joint 27 that joins the pipe body 26, a spout 28 that protrudes from the outer peripheral surface of one end of the tube body 26, and the spout 28 side of the tube body 26 in order to direct the carbonic acid solution in the container body 9 toward the spout 28. And a deflection plate 29 that closes one end of the plate.

  The joint portion 27 is a cylinder extending in the vertical direction, and communicates the internal space of the pipe body 26 and the internal space of the cap body 21. The spout 28 is a cylinder extending in the vertical direction, and its internal space communicates with the internal space of the pipe body 26. The deflecting plate 29 is a disk, and the tube main body 26 has an open end only at one end.

The pipe body 26 includes an inlet 26c on the outer peripheral surface thereof and in the middle portion of the entire axial direction, in other words, in the through direction of the through hole 24a. The inlet 26 c communicates with the through hole 24 a through the internal space of the joint portion 27. Since the pipe body 26 extends in a direction intersecting the penetration direction of the through hole 24a, the vicinity (lower part) of the inlet 26c in the cylindrical inner space of the pipe body 26 penetrates the through hole 24a. An intersection for a direction.
The internal space of the pipe body 26 is a space on the side of the spout 28 including the vicinity of the inlet 26c, in other words, a channel 26a that is a space on one side including an intersection, and a space on the opposite side of the channel 26a. For example, the space is divided into a sealed space 26b on the opposite side of the intersection (more specifically, a portion on the side opposite to the spout 28 without including the vicinity of the inlet 26c).
More specifically, the cylindrical inner space of the tube body 26 is a stepped columnar space whose diameter gradually decreases from the sealed space 26b side toward the spout 28 side. It has a cylindrical inner peripheral surface with a step. Specifically, the pipe body 26 includes both the large-diameter portion 26h facing only the sealed space 26b, the flow path 26a and the sealed space 26b, more specifically, the flow path 26a in the vicinity of the inlet 26c and the flow of the sealed space 26b. A small-diameter portion 26i facing both the road-side portion and a minimum-diameter portion 26j on the spout 28 side of the flow passage 26a are provided. Incidentally, the handle 3 side (the vicinity of the small diameter portion 26i) of the minimum diameter portion 26j is an outlet 26m of the flow path 26a, and a step portion between the minimum diameter portion 26j and the small diameter portion 26i is a valve seat portion 26n described later. . On the other hand, the step portion between the large diameter portion 26h and the small diameter portion 26i is located on the sealed space 26b side. A handle 3 is housed and supported rotatably at the end of the tube body 26 on the sealed space 26b side.

  As shown in FIGS. 1 to 3 and 7, the handle 3 includes a rotary shaft 31 that is rotatably supported by the pipe main body 26 in the sealed space 26 b and a rotary shaft 31 outside the discharge pipe 25 (pipe main body 26). And a bottom plate 34 that partitions the internal space of the rotary shaft 31 from the external space. More specifically, the bottom plate 34 closes the internal space of the rotating shaft 31 on the handle main body 35 side and outside the tube main body 26.

  The handle main body 35 intersects the outer peripheral surface of the projecting portion of the rotary shaft main body 32 so as to cover the end surface of the tube main body 26 and the outer peripheral surface of the projecting portion of the rotary shaft main body 32 radially outward. And a knob rod 37 that protrudes from the positioning rod 36 in a direction parallel to the axial direction. The positioning rod 36 and the knob rod 37 intersect with each other in a T shape.

  The rotating shaft 31 mainly includes a cylindrical rotating shaft main body 32. The rotary shaft main body 32 includes a portion accommodated in the sealed space 26 b of the tube main body 26 and a portion protruding to the outside of the tube main body 26. The outer diameter of the rotary shaft main body 32 is formed smaller than the inner diameter of the tube main body 26, and therefore, a gap is formed between the inner and outer peripheral surfaces of the pipe main body 26 and the rotary shaft main body 32 facing each other.

  A bearing portion 5 that rotatably supports the rotating shaft 31 is an inner and outer peripheral surface (hereinafter simply referred to as “inner and outer peripheral surface”) of the pipe main body 26 and the rotating shaft 31 that are opposed to each other. 35 is formed on the side. The bearing portion 5 includes an annular convex ring 5a that protrudes over the entire circumference of the outer peripheral surface of the rotary shaft main body 32, and an annular concave groove that is recessed over the entire circumference of the inner peripheral surface of the tube main body 26. 5b. The convex ring 5a and the concave groove 5b are fitted over the entire circumference in the circumferential direction. Further, the outer diameter of the convex ring 5a is equal to or larger than the inner diameter of the concave groove 5b. Therefore, the convex ring 5a and the concave groove 5b are in close contact with each other over the entire circumference in the circumferential direction using the elasticity of the resin. In the illustrated example, two convex rings 5a and two concave grooves 5b are formed at intervals in a direction parallel to the axial direction. The rotation shaft 31 is rotatably supported by the pipe body 26 by close fitting and close contact between the convex ring 5a and the groove 5b in the circumferential direction, and withstands the internal pressure generated by the carbonated liquid in the container body 9. Thus, the rotating shaft 31 is prevented from being detached from the discharge pipe 25. When the handle 3 is attached to the discharge pipe 25, the rotary shaft 31 is moved into the inside of the pipe body 26 by pushing the handle 3 toward the inner space of the discharge pipe 25 until the positioning rod 36 collides with the end surface of the pipe body 26. The convex ring 5a and the concave groove 5b are fitted.

A plurality of seal face portions 6 are provided for bringing the rotating shaft 31 and the discharge pipe 25 into close contact with each other in the circumferential direction. Two sealing surface portions 6 are formed at inner and outer peripheral surfaces of the discharge pipe 25 and the rotary shaft 31 at positions spaced in the direction parallel to the axial direction on the entrance side. In order to form the seal surface portion 6, the rotating shaft 31 includes a rotating shaft main body 32 having a cylindrical outer peripheral surface, and a flange portion 33 that protrudes over the entire circumference in the circumferential direction on the rear side of the distal end portion of the rotating shaft main body 32. The discharge pipe 25 includes a step portion of a small diameter portion 26i and a large diameter portion 26h in the vicinity of the inlet 26c on the sealed space 26b side. In the vicinity of the stepped portion, the outer diameter of the rotating shaft body 32 is equal to or larger than the inner diameter of the small diameter portion 26i, and the outer diameter of the flange portion 33 is equal to or larger than the inner peripheral surface of the large diameter portion 26h. The seal surface portion 6 includes a first seal surface portion 6a in which the small-diameter portion 26i and the inner and outer peripheral surfaces of the distal end portion of the rotary shaft main body 32 are in close contact, and a second seal portion in which the large-diameter portion 26h and the inner and outer peripheral surfaces of the flange portion 33 are in close contact. And a sealing surface portion 6b. The first and second seal surface portions 6a and 6b are in close contact with each other with annular surfaces.
Further, the boundary surface 33a where the outer peripheral surface of the tip end portion of the rotating shaft main body 32 and the outer peripheral surface of the flange portion 33 are continuous is tapered so that the diameter gradually increases toward the outer peripheral surface side of the flange portion 33. The roundness of the portions to be the second seal surface portions 6a and 6b is maintained with high accuracy. That is, when the handle 3 is molded, the roundness of the first and second seal surface portions 6a and 6b is prevented from being distorted as much as possible due to resin sink, thereby improving the sealing performance.

  As shown in FIGS. 1 to 3 and 8, the plug body 4 is mainly composed of a valve rod 41 that can linearly reciprocate in the flow path 26 a along the axial direction. A portion on the handle 3 side, which is one end portion of the valve stem 41, is a portion accommodated in the internal space of the rotating shaft 31, and the stroke of the valve rod 41 reciprocating linearly is the position of the bottom plate 34 that closes the rotating shaft 31. Determined by. The valve stem 41 includes a cylindrical valve stem body 41a and a closing plate 41b that closes one end of the valve stem body 41a (the end located on the flow path 26a).

  A screw portion 7 that transmits the rotation of the handle body 35 to the plug body 4 is provided on the inner and outer peripheral surfaces of the rotary shaft 31 and the valve rod 41. The threaded portion 7 includes a female threaded portion 7 a formed on the inner peripheral surface of the rotating shaft 31 and one end portion of the valve rod 41 (one end portion of the one accommodated in the rotating shaft 31, hereinafter referred to as “base end portion”). And a male screw portion 7b formed on the outer peripheral surface.

Further, a guide portion as a conversion mechanism portion 8 for converting the rotational motion of the handle body 35 into the linear reciprocating motion of the plug body 4 is provided on the inner and outer peripheral surfaces of the discharge pipe 25 and the plug body 4 facing each other. The guide portion includes a rail 8a extending in a direction parallel to the axial direction, and a slider 8b that moves along the rail 8a.
Two rails 8a are formed on the inner peripheral surface of the pipe body 26 at intervals in the circumferential direction. More specifically, one rail 8a is formed at opposing positions centering on the axis.
On the other hand, the slider 8b is formed on the front end (portion protruding from the rotating shaft 31) of the outer peripheral surface of the valve stem 41 (valve stem main body 41a), more specifically, on the base end side of the front portion. Yes. Two sliders 8b are provided corresponding to the two rails 8a, and the two sliders 8b and 8b are formed at intervals of about 180 degrees in the circumferential direction of the valve stem body 41a. Further, each slider 8b is composed of a pair of guide pieces 8c, 8c sandwiched between both sides of the rail 8a (both sides in the circumferential direction centering on the axis) via a gap. That is, the pair of guide pieces 8c, 8c are formed at intervals in the circumferential direction on the outer peripheral surface of the valve stem body 41a.

Further, as described above, the discharge pipe 25 includes the outlet 26m of the flow path 26a in the vicinity of the step portion between the small diameter portion 26i and the minimum diameter portion 26j. More specifically, the outlet 26m of the flow path 26a is a portion of the inner peripheral surface of the minimum diameter portion 26j closest to the small diameter portion 26i, and has a stepped shape as described above, that is, the step shape between the small diameter portion 26i and the minimum diameter portion 26j. The portion that narrows the inner diameter is the valve seat portion 26n. A valve portion 42 that can be brought into close contact with and separated from the inner peripheral surface of the valve seat portion 26n is formed at the tip of the valve rod 41 (valve rod main body 41a).
The valve part 42 protrudes from the outer peripheral surface of the tip part of the valve rod 41 over the entire circumference. However, the outer diameter of the valve portion 42 is smaller than the inner peripheral surface of the small diameter portion 26i. Therefore, when the valve seat portion 26n and the valve portion 42 are in close contact with each other, the outer peripheral surface of the valve seat portion 26n is A slight gap is formed between the inner peripheral surface of the small diameter portion 26i. However, the contact piece 42b protrudes radially outward from a part of the entire circumference of the outer peripheral surface of the valve portion 42, and the overhanging portion 26z with which the contact piece 42b interferes (overrides) when the valve rod 41 reciprocates is a small diameter portion 26i. Is formed on the outlet side of the inner peripheral surface. More specifically, with respect to the valve portion 42 in the case where the valve portion 42 is in close contact with the valve seat portion 26n, the overhang portion 26z is radially inward on the inner peripheral surface of the small diameter portion 26i at a position adjacent to the handle 3 side. Is formed to protrude. Further, when viewed from the axial direction on the outer peripheral surface of the valve portion 42, a pair of recesses 42a, 42a through which the pair of rails 8a are passed are formed to be recessed so that the valve portion 42 does not interfere with the rail 8a. The close contact area between the portion 42 and the valve seat portion 26n is increased.
A short cylindrical plug portion 43 protrudes from the tip of the valve rod 41 in a direction parallel to the axial direction. More specifically, the plug portion 43 is formed concentrically around the axial direction. The outer diameter of the plug portion 43 is a dimension that is rounded and chamfered in an arc shape so that the tip portion is tapered toward the tip, and the outer diameter of at least the root portion (valve portion 42 side) of the plug portion 43 is The inner diameter of the minimum diameter portion 26j is greater than the inner diameter of the outlet 26m. Therefore, when the plug portion 43 enters the inside of the outlet 26m, the plug portion 43, the outlet 26m, and the inner and outer peripheral surfaces come into close contact with each other.
Accordingly, the part for opening and closing the outlet 26m of the flow path 26a includes a part for directly opening and closing the outlet 26m (the outlet 26m and the plug part 43) and a part for indirectly opening and closing the outlet 26m (the valve seat part 26n and the valve part 42). Of the mutually opposing surfaces (surfaces orthogonal to the axial direction).

The pressure-resistant cock 1 described above ensures sealing performance as follows.
Ensuring the sealing property on the opposite side to the outlet 26m side of the flow path 26a is accommodated in the discharge pipe 25 and the closed space 26b side regardless of whether the outlet 26m of the flow path 26a is open or closed. This is performed at two locations, the first seal surface portion 6a and the second seal surface portion 6b formed on the inner and outer peripheral surfaces of the rotating shaft 31. Incidentally, since the handle 3 and the plug 4 are screwed together by the screw portion 7, the carbonic acid solution enters the inner and outer peripheral surfaces of the rotating shaft 31 and the valve rod 41. However, the rotating shaft 31 has the end portion of the rotating shaft main body 32 closed by the bottom plate 34, so that the carbonic acid solution does not leak to the outside of the handle main body 35. In the plug body 4, the carbonic acid solution enters the inside of the valve stem 41 (valve stem body 41a), but the end of the valve stem body 41a is closed by the closing plate 41b. No carbon dioxide leaks out from the outside.
On the other hand, the sealing performance on the outlet 26m side of the flow path 26a is ensured by the close contact between the outlet 26m of the discharge pipe 25 and the plug portion 43 and the close contact between the valve seat portion 26n and the valve portion 42.

  Further, the pressure cock 1 of the first embodiment described above is assembled as three parts of a cap 2, a plug body 4 and a handle 3 as shown in FIG. 10, and is commonly called a bag-in-box as shown in FIG. It is connected to the mouth portion 9 a of the container body 9. Incidentally, as shown in FIG. 11, the container body 9 has a mouth portion 9a bonded or welded to a rectangular parallelepiped body portion 9c for containing a carbonic acid solution. As shown in FIGS. 4 and 5, when the handle 26 is turned in one direction in a state where the outlet 26m is completely open, the plug body 4 moves forward in a direction approaching the outlet 26m. More specifically, when the handle 3 is rotated in one direction, the rotation shaft 31 rotates in one direction while the position of the handle 3 in the axial direction is constant due to the fitting of the bearing portion 5. Since the rotary shaft 31 (handle 3) and the plug body 4 are screwed together by the screw portion 7, when the rotary shaft 31 rotates in one direction, the plug body 4 also tries to rotate together. However, since the plug body 4 is held in a non-rotatable manner with respect to the discharge pipe 25 by the conversion mechanism portion 8, only the rotation shaft 31 rotates in one direction, and the slider 8b moves along the rail 8a of the conversion mechanism portion 8. As a result, the plug body 4 moves forward in a direction approaching the outlet 26m. Since the slider 8b (the pair of guide pieces 8c, 8c) sandwiches the rail 8a with a gap in the circumferential direction, the plug body 4 is slightly rotated in one direction, and then the rotation is performed on the rail 8a. And will move forward toward the exit 26m. By this slight rotation of the plug body 4 in one direction, the force required to start moving is reduced and the plug can be closed with a light force. Immediately after the contact piece 42b of the valve portion 42 gets over the overhanging portion 26z, the valve portion 42 comes into close contact with the valve seat portion 26n, the outlet portion 26m is clogged with the plug portion 43, and as shown in FIGS. Is completely blocked.

  When the handle 26 is turned in the reverse direction in the state where the outlet 26m is completely blocked, the plug 4 is slightly rotated in the reverse direction and then prevented from rotating by the rail 8a. Immediately after the return movement, the contact piece 42b of the valve portion 42 gets over the overhang portion 26z. When the handle 3 is rotated in the reverse direction to the end, the valve rod 41 of the plug body 4 enters deep into the rotary shaft 31 and the valve rod 41 collides with the bottom plate 34 of the handle 3 positioned outside the discharge pipe 25. Then, the outlet 26m is completely opened. In this state, as shown in FIGS. 4 and 5, the inlet 26c is greatly opened, and a large amount of carbonic acid solution is discharged.

  The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention. For example, the valve stem 41 is not limited to the hollow shape having the valve stem main body 41a having a cylindrical shape, that is, an internal space, and may be a solid shape having a columnar shape, that is, having no internal space. Further, the discharge pipe 25 may have no joining portion 27, and the pipe body 26 may be joined directly to the closing plate 24 of the cap body 21. Further, the discharge pipe 25 may be configured only by the pipe main body 26 without the spout 28 and the direction change plate 29 as well as the joint portion 27. Further, the plug body 4 is not limited to the one that projects the plug portion 43 ahead of the valve rod 41, and may be one without the plug portion 43. In this case, the state in which the outlet 26m is closed is the valve portion 42 and the valve seat. The portion 26n is in close contact with the axial direction. In addition, the relative hardness of each component may be the same or different in the hardness of the resin. In the case of making a difference, the handle 3 and the plug 4 are made softer than the cap 2 or vice versa. It may be hard.

DESCRIPTION OF SYMBOLS 1 Pressure-resistant cock 2 Cap 21 Cap main body 22 Outer cylinder 22a Female screw 23 Inner cylinder 24 Closure plate 24a Through hole 25 Drain pipe 26 Pipe main body 26a Flow path 26b Sealed space 26c Inlet 26h Large diameter part 26i Small diameter part 26j Minimum diameter part 26m Outlet 26n valve seat part 26z overhang part 27 joint part 28 spout 29 turning plate 3 handle 31 rotating shaft 32 rotating shaft main body 33 flange part 33a interface 34 bottom plate 35 handle main body 36 positioning rod 37 picking rod 4 plug body 41 valve rod 41a valve stem body 41b closing plate 42 valve part 42a concave part 42b contact piece 43 plug part 5 bearing part 5a convex ring 5b concave groove 6 seal face part 6a first seal face part 6b second seal face part 7 screw part 7a female thread part 7b Male screw part 8 Conversion mechanism part 8a rail 8b slider 8c guide piece 9 Container body 9a mouth part 9b male screw 9c Trunk

Claims (4)

A cap body attached to the mouth of the container, and a resin cap having a discharge pipe extending in a direction intersecting with the through direction of the through hole formed in the closing plate for narrowing the diameter of the cap body;
A cylindrical rotary shaft that is housed in a sealed space on one side of the intersection with respect to the penetration direction of the through hole in the discharge pipe, a handle body that rotates the rotary shaft outside the discharge pipe, and an internal space of the rotary shaft is closed on the handle body side A resin handle having a bottom plate to be
A resin plug having a valve rod in which a base end portion is accommodated in the rotation shaft and having a valve rod whose tip is disposed in a flow path opposite to the sealed space in the discharge pipe;
As a bearing portion that rotatably supports the rotating shaft, an annular concave groove is provided on the inner peripheral surface of the discharge pipe, and an annular convex ring that fits into the concave groove is provided on the outer peripheral surface of the rotary shaft. ,
The inner and outer peripheral surfaces of the valve stem and rotating shaft are equipped with threaded parts that transmit the rotation of the handle body.
As a conversion mechanism that converts the rotational movement of the handle body into linear reciprocating movement of the valve stem in the discharge pipe, a rail parallel to the axial direction of the rotary shaft and a slider that moves along the rail are connected to the discharge pipe. Prepared on the inner and outer peripheral surfaces of the valve stem of the stopper,
The discharge pipe is provided with a valve seat that narrows the inner diameter of the outlet of the flow path, and a valve portion that can be in close contact with the valve seat at the tip of the valve stem of the plug,
The inner and outer peripheral surfaces of the discharge pipe and the rotary shaft on the flow path side with respect to the bearing portion are provided with a plurality of seal surface portions that are in close contact with each other in the circumferential direction at positions separated in a direction parallel to the axial direction .
The discharge pipe includes a stepped cylindrical inner peripheral surface having a small diameter portion facing both the flow path and the sealed space, and a large diameter portion facing only the sealed space,
The rotating shaft includes a rotating shaft main body having a cylindrical outer peripheral surface, and a flange portion protruding over the entire circumference in the circumferential direction on the handle side of the tip of the rotating shaft main body,
The seal surface portion includes a first seal surface portion in which the inner and outer peripheral surfaces of the small-diameter portion of the discharge pipe and the distal end portion of the rotary shaft body are in close contact, and a second seal surface in which the inner and outer peripheral surfaces of the large-diameter portion and the flange portion of the discharge pipe A pressure-resistant cock comprising a sealing surface portion .   The taper shape in which the boundary surface where the outer peripheral surface of the tip end portion of the rotating shaft main body and the outer peripheral surface of the flange portion are continuous is gradually increased in diameter toward the outer peripheral surface side of the flange portion. The pressure-resistant cock according to 1.   As the conversion mechanism, the rail is provided on the inner peripheral surface of the discharge pipe, and the slider is provided on the outer peripheral surface of the valve stem of the plug body,
  3. The pressure resistance according to claim 1, wherein the valve portion protrudes from the outer peripheral surface of the tip portion of the valve stem over the entire circumference in the circumferential direction, and has a concave portion through which the rail passes on the outer peripheral surface. cock. A cap body attached to the mouth of the container, and a resin cap having a discharge pipe extending in a direction intersecting with the through direction of the through hole formed in the closing plate for narrowing the diameter of the cap body;
A cylindrical rotary shaft that is housed in a sealed space on one side of the intersection with respect to the penetration direction of the through hole in the discharge pipe, a handle body that rotates the rotary shaft outside the discharge pipe, and an internal space of the rotary shaft is closed on the handle body side A resin handle having a bottom plate to be
A resin plug having a valve rod in which a base end portion is accommodated in the rotation shaft and having a valve rod whose tip is disposed in a flow path opposite to the sealed space in the discharge pipe;
As a bearing portion that rotatably supports the rotating shaft, an annular concave groove is provided on the inner peripheral surface of the discharge pipe, and an annular convex ring that fits into the concave groove is provided on the outer peripheral surface of the rotary shaft. ,
The inner and outer peripheral surfaces of the valve stem and rotating shaft are equipped with threaded parts that transmit the rotation of the handle body.
As a conversion mechanism that converts the rotational movement of the handle body into linear reciprocating movement of the valve stem in the discharge pipe, a rail parallel to the axial direction of the rotary shaft and a slider that moves along the rail are connected to the discharge pipe. Prepared on the inner and outer peripheral surfaces of the valve stem of the stopper,
The discharge pipe is provided with a valve seat that narrows the inner diameter of the outlet of the flow path, and a valve portion that can be in close contact with the valve seat at the tip of the valve stem of the plug,
The inner and outer peripheral surfaces of the discharge pipe and the rotary shaft on the flow path side with respect to the bearing portion are provided with a plurality of seal surface portions that are in close contact with each other in the circumferential direction at positions separated in a direction parallel to the axial direction.
As the conversion mechanism, the rail is provided on the inner peripheral surface of the discharge pipe, and the slider is provided on the outer peripheral surface of the valve stem of the plug body,
The valve cock protrudes from the outer peripheral surface of the tip portion of the valve stem over the entire circumference in the circumferential direction, and has a recess through which the rail is passed on the outer peripheral surface.

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