Valve and filter container

Abstract

Provided is a valve capable of switching between opening and closing of a flow path by a simple structure while preventing twisting of a pipe constituting the flow path due to rotation. The problem is solved by a valve provided with: a first tube having a cylindrical outer shape and having a first tube end portion therein, the first tube having a first flow path extending in the direction of the axis of the cylinder, the first flow path forming an opening at the first tube end portion; a second pipe which extends coaxially with the shaft, has a second pipe end portion, has a cylindrical outer shape, and has a second flow path extending in the direction of the shaft, and an insertion portion of the second pipe end portion is inserted into the first flow path of the first pipe from the opening of the first pipe; and a rotating ring that is held on the outer peripheral surfaces of the first tube and the second tube, respectively, by the first tube and the second tube so as to be rotatable about the axis.

Description

Technical Field

[0001] The present invention relates to valves and filter containers. Background Art

[0002] There are valves that open and close a flow path by rotating. For example, Patent Document 1 discloses a plunger that opens and closes a flow path by rotating.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 5753557 Summary of the invention

[0006] Problems to be solved by the invention

[0007] For example, in the plunger disclosed in the patent document, there is a problem that the plunger constituting the flow path is twisted due to the rotation for opening and closing. In particular, in the structure in which the plunger is rotated by using a cam groove and a cam follower, there is inevitably a problem of the flow path twisting. In particular, in the valve structure connected with a flexible tube, the frequency of the tube constituting the flow path is high, and there is a problem that the durability of the structure including the valve is reduced. In addition, due to the elasticity of the tube, there is also the following problem: the tube is twisted, and the restoring force based on the tube twisting causes the valve to malfunction. A simple structure is desired that can switch the opening and closing of the flow path by rotation while preventing the tube constituting the flow path from twisting.

[0008] Means for solving problems

[0009] The problem is solved by the following valve, which comprises: a first tube, which has a first tube end portion, the first tube has a cylindrical shape, and the first tube has a first flow path extending in the direction of the axis of the cylinder, the first flow path forming an opening at the first tube end portion; a second tube, which extends coaxially with the axis and has a second tube end portion, the second tube has a cylindrical shape, and the second tube has a second flow path extending in the direction of the axis, the insertion portion of the second tube end portion is inserted into the first flow path of the first tube from the opening of the first tube; and a rotating ring, which is held by the first tube and the second tube on the outer circumferential surfaces of the first tube and the second tube respectively in a manner rotatable around the axis, wherein the second flow path does not reach the second tube end but moves toward the first flow path at the insertion portion of the second flow path The inner wall of the flow path extends to form an opening in the insertion portion of the second flow path, a cam follower protrusion is provided on the surface of the first tube, and the rotating ring has a guide cam groove for accommodating the cam follower protrusion, and the guide cam groove causes the cam follower protrusion to move between a first position and a second position through the rotation of the rotating ring, thereby causing the first tube and the second tube to move relative to each other, in the first position, the insertion portion at the second tube end of the second tube is the longest, and in the second position, the insertion portion at the second tube end of the second tube is shorter than in the first position, and the valve has a closed state in the first position in which the first flow path is not fluidically connected to the second flow path, and has an open state in the second position in which the first flow path is fluidically connected to the second flow path.

[0010] The problem is solved by the following filter container, which has a valve, wherein the valve has: a first tube having a first tube end portion, the first tube having a cylindrical shape, and the first tube having a first flow path extending in the direction of the axis of the cylinder, the first flow path forming an opening at the first tube end portion, the first flow path being communicated with the interior of the filter container on the opposite side to the first tube end portion; a second tube extending coaxially with the axis, having a second tube end portion, the second tube having a cylindrical shape, and the second tube having a second flow path extending in the direction of the axis, the insertion portion of the second tube end portion being inserted into the first flow path of the first tube from the opening; and a rotating ring, which is held by the first tube and the second tube on the outer peripheral surfaces of the first tube and the second tube respectively in a manner rotatable around the axis, the second flow path not reaching the first tube end portion. 2. The cam-following device of claim 1, wherein the first tube and the second tube end are connected at least one of the plurality of interlocking portions of the first tube and the second tube end, and the plurality of interlocking portions are connected at least one of the plurality of interlocking portions of the first tube and the second tube end.

[0011] Effects of the Invention

[0012] According to the present invention, it is possible to realize a valve that can switch between opening and closing of a flow path by a simple structure while preventing a tube constituting the flow path from being twisted due to rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view of the valve according to the first embodiment of the present invention.

[0014] Figure 2A It is a side view of the valve in the closed state according to the first embodiment of the present invention.

[0015] Figure 2B It is a cross-sectional view of the valve in the closed state according to the first embodiment of the present invention.

[0016] Figure 3A It is a side view of the valve in the open state according to the first embodiment of the present invention.

[0017] Figure 3B It is a cross-sectional view of the valve in the open state according to the first embodiment of the present invention.

[0018] Figure 4A It is a cross-sectional view showing a holding portion of a rotating ring of a valve according to another embodiment of the present invention.

[0019] Figure 4B It is a cross-sectional view showing a holding portion of a rotating ring of a valve according to another embodiment of the present invention.

[0020] Figure 4C It is a cross-sectional view showing a holding portion of a rotating ring of a valve according to another embodiment of the present invention.

[0021] Figure 5A It is a diagram showing another embodiment of the guide cam groove and the follower protrusion according to the embodiment of the invention of the present application.

[0022] Figure 5B It is a diagram showing another embodiment of the guide cam groove and the follower protrusion according to the embodiment of the invention of the present application.

[0023] Figure 5C It is a diagram showing still another embodiment of the guide cam groove and the follower protrusion according to the embodiment of the invention of the present application.

[0024] Figure 5D It is observed from the axial direction of the follower protrusion Figure 5C An enlarged view of the guide cam groove and follower protrusion.

[0025] Figure 5E It is a diagram showing still another embodiment of the guide cam groove and the follower protrusion according to the embodiment of the invention of the present application. DETAILED DESCRIPTION

[0026] [First embodiment]

[0027] Reference Figures 1 to 3B , a valve 1 as an embodiment of the present invention will be described. Figure 1 It is a perspective view of the valve 1 according to the first embodiment of the present invention. Figure 2A It is a side view of the valve 1 in the closed state according to the first embodiment of the present invention. Figure 2B It is a cross-sectional view of the valve 1 in the closed state according to the first embodiment of the present invention.

[0028] Figure 3A It is a side view of the valve 1 in the open state according to the first embodiment of the present invention. Figure 3B It is a cross-sectional view of the valve 1 in the closed state according to the first embodiment of the present invention.

[0029] The valve 1 includes a first tube 2, a second tube 3, and a rotating ring 4. The first tube 2 includes a first tube end 2a and has a cylindrical outer shape. The first tube 2 includes a first flow path 21 inside in a manner extending in the direction of the axis of the cylinder as the outer shape. The first flow path 21 forms a first tube end opening 2b at the first tube end 2a. The diameter of the first flow path 21 is expanded at the first tube end opening 2b. That is, the first flow path 21 is composed of a first flow path mainstream portion 21a with a narrow diameter and a first flow path expansion portion 21b with a larger diameter than the first flow path mainstream portion 21a. The first tube end opening 2b is formed as an opening of the first flow path expansion portion 21b. The end portion (not shown) on the opposite side to the first tube end 2a is connected to a fluid source, and the first flow path 21 is connected to the fluid source. The first flow path 21 on the side of the first tube end 2a is typically cylindrical.

[0030] The second tube 3 extends coaxially with the axis of the first tube 2. The second tube 3 has a second tube end 3a at one end and a second tube terminal 3b at the other end opposite to the second tube end 3a. The second tube 3 has a second flow path 32 extending in the axial direction therein.

[0031] The valve 1 is a valve that allows a fluid to flow between the first flow path 21 and the second flow path 32, and can set either the first flow path 21 or the second flow path 32 as the upstream and the other as the downstream. In this specification, the first flow path 21 is set as the upstream and the second flow path 32 is set as the downstream as a representative example.

[0032] The second tube 3 has an insertion portion 3c, and the side of the insertion portion 3c including the second tube end portion 3a has a shape complementary to the shape of the first flow path 21 on the first tube end portion 2a side. In the case where the first flow path 21 on the first tube end portion 2a side is a representative cylindrical shape, the insertion portion 3c has a cylindrical shape. The insertion portion 3c of the second tube 3 is inserted from the first tube end opening 2b of the first tube 2 to the first flow path expansion portion 21b of the first flow path 21 of the first tube 2. The portion of the second tube end portion 3a in the insertion portion 3c of the second tube 3 has a radius smaller than the radius of the cylindrical shape of the insertion portion 3c of the second tube 3.

[0033] When the insertion portion 3c of the second tube 3 is inserted into the first flow path 21 of the first tube 2, the outer diameter of the insertion portion 3c of the second tube 3 is slightly smaller than the inner diameter of the first flow path expansion portion 21b of the first flow path 21 of the first tube 2, and a flow path gap 5 is formed between the outer diameter of the insertion portion 3c of the second tube 3 and the inner diameter of the first flow path 21 of the first tube 2. The flow path gap 5 is a gap formed between the first flow path expansion portion 21b and the insertion portion 3c of the second tube 3.

[0034] The central axis of the insertion portion 3c of the second tube 3 is coaxial with the central axis of the first flow path 21 of the first tube 2, and the insertion portion 3c of the second tube 3 can move along the central axis of the first flow path 21 of the first tube 2. This movement is such that the insertion length of the insertion portion 3c of the second tube 3 inserted into the first flow path 21 of the first tube 2 is between D1 and D2 which is shorter than D1. In the closed state of the valve 1, the insertion length of the insertion portion 3c of the second tube 3 is D1, which is a state in which the insertion portion 3c of the second tube 3 is most deeply inserted into the first flow path 21 of the first tube 2. On the other hand, in the open state of the valve 1, the insertion length of the insertion portion 3c of the second tube 3 is D2, which is a state in which the insertion portion 3c of the second tube 3 is most shallowly inserted into the first flow path 21 of the first tube 2.

[0035] The second flow path 32 forms an opening at the second tube terminal tube portion 3b and extends from the second tube terminal tube portion 3b toward the second tube end portion 3a. However, the second flow path 32 does not reach the second tube end portion 3a but extends axially toward the inner wall of the first flow path 21 at the insertion portion 3c of the second flow path 32, thereby forming an opening 33 on the circumferential surface of the insertion portion 3c of the second flow path 32. The opening 33 of the insertion portion 3c of the second flow path 32 is fluidically connected to the flow path gap 5.

[0036] The inserting portion 3c of the second tube 3 is provided with a sealing member 34a (first sealing member) over the entire circumference of the inserting portion 3c of the second tube 3 on the first tube end opening 2b side of the flow path gap 5 so that the flow path gap 5 does not communicate with the outside of the first tube end opening 2b via the first tube end opening 2b at the first tube end 2a. The sealing member 34a is in close contact with the inner surface of the first flow path expansion portion 21b of the first flow path 21 and is arranged so that the second tube 3 can slide in the first flow path 21. The sealing member 34a is a sealing member that ensures that the fluid in the flow path gap 5 can flow into the opening 33 of the inserting portion 3c of the second flow path 32. In both the open state and the closed state of the valve 1, the flow path gap 5 is fluidically isolated and not communicated with the first tube end 2a side of the sealing member 34a in the central axis direction of the first flow path 21 of the first tube 2 by the sealing member 34a.

[0037] On the other hand, a sealing member 34b (second sealing member) is arranged around the entire circumference of the second tube end 3a of the second tube 3 on the opposite side of the opening 33 of the insertion portion 3c of the second flow path 32 and the position of the sealing member 34a in the central axis direction of the first flow path 21 of the first tube 2. The outer diameter of the sealing member 34b is smaller than the outer diameter of the sealing member 34a. The sealing member 34a is in close contact with the inner surface of the first flow path expansion portion 21b of the first flow path 21 and is arranged so that the second tube 3 can slide in the first flow path 21. In contrast, the sealing member 34b is in close contact with the inner surface of the first flow path main flow portion 21a of the first flow path 21 when the valve 1 is closed, that is, when the insertion length of the insertion portion 3c of the second tube 3 is D1, and is arranged so that the second tube 3 can slide in the first flow path 21. On the other hand, in the open state of the valve 1, that is, when the insertion length of the insertion portion 3c of the second pipe 3 is D2, the sealing member 34b moves from the first flow path main stream portion 21a of the first flow path 21 to the first flow path expansion portion 21b of the first flow path 21. The outer diameter of the sealing member 34b is smaller than the inner diameter of the first flow path expansion portion 21b of the first flow path 21, so that a gap can be formed between the outer surface of the sealing member 34b and the inner surface of the first flow path expansion portion 21b. Thus, in the closed state of the valve 1, the flow path gap 5 is fluidically isolated from the first flow path main stream portion 21a on the opposite side of the sealing member 34b from the first pipe end portion 2a in the central axis direction of the first flow path 21 of the first pipe 2 by the sealing member 34b and does not communicate. On the other hand, in the open state of the valve 1, even if the sealing member 34b is present, the flow path gap 5 is fluidically connected to the first flow path main stream portion 21a in the central axis direction of the first flow path 21 of the first pipe 2.

[0038] Thus, the following flow circuit is formed: in the open state of the valve 1, the fluid inside the first flow path 21 of the first tube 2 flows from the first flow path main stream portion 21a through the flow path gap 5, reaches the second flow path 32 from the opening 33 on the peripheral surface of the insertion portion 3c of the second flow path 32, and is discharged to the outside from the opening of the second tube terminal tube portion 3b. In order to facilitate the fluid inside the first flow path 21 of the first tube 2 to flow from the first flow path main stream portion 21a into the flow path gap 5, a groove 3d that reduces the area of ​​the surface perpendicular to the central axis of the first flow path 21 of the first tube 2 may be arranged at the second tube end portion 3a of the second tube 3 to expand the flow path.

[0039] Furthermore, in this flow circuit, when the valve 1 is closed, the sealing member 34b of the second tube 3 contacts the inner surface of the first flow path main flow portion 21a of the first flow path 21, so that the fluid inside the first flow path 21 of the first tube 2 cannot reach the flow path gap 5 from the first flow path main flow portion 21a, and the valve 1 is closed. When the valve 1 is closed, the second tube end portion 3a of the second tube 3 passes over the first flow path expansion portion 21b in the first flow path 21 and reaches the first flow path main flow portion 21a.

[0040] The rotating ring 4 is a component for controlling the positional relationship between the first tube 2 and the second tube 3 in the open state and the closed state of the valve 1. The rotating ring 4 is held on the outer peripheral surfaces of the first tube 2 and the second tube 3 by the first tube 2 and the second tube 3 so as to be rotatable relative to the first tube 2 and the second tube 3 around the central axes of the first tube 2 and the second tube 3, respectively.

[0041] The rotating ring 4 is in the shape of a hollow cylinder, and has a retaining protrusion 42 on the inner circumferential surface of the cylindrical shape of the rotating ring 4, which protrudes from the inner circumferential surface toward the center of the cylindrical shape of the rotating ring 4. For example, the second tube 3 has a retaining recess 31 opened along the direction around the axis on the outer circumferential surface of the second tube 3. The retaining protrusion 42 of the rotating ring 4 is engaged with the retaining recess 31 on the outer circumferential surface of the second tube 3, and the rotating ring 4 is respectively retained by the first tube 2 and the second tube 3 in a manner that can rotate around the central axis of the first tube 2 and the second tube 3. In this state, the first tube 2 is partially inserted into the hollow part of the rotating ring 4 including the first tube end 2a.

[0042] The first pipe 2 has a cam follower protrusion 22 on its surface. The cam follower protrusion 22 is, for example, a protrusion formed so as to protrude from the peripheral surface of the first pipe 2 in a direction perpendicular to the central axis of the first pipe 2. Typically, the cam follower protrusion 22 has a cylindrical shape.

[0043] A guide cam groove 41 is formed on the circumferential surface of the rotating ring 4. The guide cam groove 41 accommodates the cam follower protrusion 22. The second tube 3 functions as a plunger relative to the first tube 2 in the valve 1 by the engagement between the holding protrusion 42 of the rotating ring 4 and the holding recess 31 of the second tube 3 and the engagement between the guide cam groove 41 and the cam follower protrusion 22.

[0044] The guide cam groove 41 is composed of, for example, a first groove 41a, a second groove 41b, and a transition groove 41c. The first groove 41a, the second groove 41b, and the transition groove 41c are grooves whose widths are substantially the same as or larger than the width of the cam follower protrusion 22, and the cam follower protrusion 22 can move along each of the first groove 41a, the second groove 41b, and the transition groove 41c. As long as the cam follower protrusion 22 can move along each groove, the first groove 41a, the second groove 41b, and the transition groove 41c do not need to be through-grooved holes penetrating the inner and outer surfaces of the rotating ring 4, and may be grooves formed by depressions opened on the surface side of the first tube 2 opposite to the cam follower protrusion 22.

[0045] The first groove 41a is a groove formed on a surface perpendicular to the axis in a direction around the axis. The first groove 41a is formed on a side close to the first tube end 2a of the first tube 2 in a direction along the center axis of the first tube 2 to define a first position. The first groove 41a is formed at a predetermined angle around the center axis of the first tube 2 in a direction perpendicular to the center axis of the first tube 2. When the cam follower protrusion 22 is located in the first groove 41a, the positions of the first tube 2 and the second tube 3 in the direction of the center axis do not change.

[0046] The second groove 41b is a groove formed on a plane perpendicular to the axis in a direction around the axis. The second groove 41b is formed on the side of the first tube end 2a that is farther from the first tube 2 than the first position in the direction along the center axis of the first tube 2 to define the second position. The second groove 41b is also formed at a predetermined angle around the center axis of the first tube 2 in a direction perpendicular to the center axis of the first tube 2. When the cam follower protrusion 22 is located in the second groove 41b, the positions of the first tube 2 and the second tube 3 in the direction of the center axis do not change. That is, the first groove 41a defining the first position is located on the side closer to the second tube 3 than the second groove 41b defining the second position in the direction along the center axis of the first tube 2, and thus the first groove 41a is located on the side closer to the second tube 3 than the second groove 41b in the direction along the center axis of the first tube 2.

[0047] The transition groove 41 c is a groove that connects the first groove 41 a and the second groove 41 b. The transition groove 41 c is a groove that extends in a direction that has an angle with respect to a plane that is perpendicular to the central axis of the first pipe 2 .

[0048] In the first position, the insertion portion 3c of the second tube end portion 3a of the second tube 3 is longest, and in the second position, the insertion portion 3c of the second tube end portion 3a of the second tube 3 is defined to be shorter than in the first position.

[0049] When the cam follower protrusion 22 is located at the first position of the first groove 41a, the valve 1 corresponds to the closed state. That is, in the first position, the sealing member 34b of the second tube 3 is located in the first flow path main flow portion 21a of the first flow path 21, and in a state where the outer surface of the sealing member 34b contacts the inner surface of the first flow path main flow portion 21a of the first flow path 21, the first flow path 21 of the first tube 2 and the flow path gap 5 are fluidically cut off (disconnected), and the fluid in the first flow path 21 of the first tube 2 does not reach the second flow path 32 of the second tube 3.

[0050] On the other hand, when the cam follower protrusion 22 is located at the second position of the second groove 41b, the valve 1 corresponds to the open state. That is, in the second position, when the sealing member 34b of the second tube 3 is separated from the first flow path main stream portion 21a of the first flow path 21 and retreats to the inside of the first flow path expansion portion 21b, the first flow path 21 of the first tube 2 is fluidically connected to the flow path gap 5, and the fluid inside the first flow path 21 of the first tube 2 flows from the first flow path main stream portion 21a through the flow path gap 5, reaches the second flow path 32 from the opening 33 on the peripheral surface of the insertion portion 3c of the second flow path 32, and is discharged to the outside from the opening of the second tube terminal tube portion 3b.

[0051] The cam follower protrusion 22 can move between the first position and the second position in the guide cam groove 41 by the axial rotation of the rotating ring 4. By the movement of the cam follower protrusion 22 between the first position and the second position in the guide cam groove 41, the rotating ring 4 can move the first tube 2 and the second tube 3 relative to each other.

[0052] The valve 1 can be installed, for example, in the following manner: the first pipe 2 is installed in the filter container (not shown), the second pipe 3 is opened to the atmosphere, the first flow path 21 of the first pipe 2 is set as the upstream, and the second flow path 32 of the second pipe 3 is set as the downstream. At this time, the fluid inside the filter container is discharged from the opening of the terminal pipe portion 3b of the second pipe through the first flow path 21 and the second flow path 32 by fluid communication from the first flow path 21 of the first pipe 2 to the second flow path 32 of the second pipe in the open state of the valve 1. In particular, there is a pre-filtration preparation stage of the fluid and air inside the filter container, and when the air inside is discharged, it can function as a so-called exhaust valve and drain valve for exhausting the air inside the filter container and the filtered fluid in the filter container that follows it.

[0053] With these structures, the valve 1 can be operated as follows and can exert the following functions. When the cam follower projection 22 is located in the first groove 41a, that is, in the first position, that is, in the closed state where the valve 1 is closed, the sealing member 34b of the second pipe 3 is in contact with the inner surface of the first flow path main flow portion 21a of the first flow path 21. At this time, the fluid inside the filter container is not discharged from the opening of the second pipe terminal pipe portion 3b.

[0054] When the fluid in the filter container is discharged, the rotating ring 4 is rotated around the central axis of the first tube 2 or the second tube 3 to move the cam follower protrusion 22 from the first groove 41a to the transition groove 41c. When the cam follower protrusion 22 moves in the transition groove 41c, the second tube end 3a of the insertion portion 3c of the second tube 3 gradually moves away from the first flow path main flow portion 21a of the first flow path 21 of the first tube 2 and moves into the first flow path expansion portion 21b. Along with this, the contact between the sealing member 34b of the second tube 3 and the inner surface of the first flow path main flow portion 21a of the first flow path 21 is gradually released, and the first flow path main flow portion 21a of the first flow path 21 and the second tube end 3a of the second tube 3 begin to separate.

[0055] The rotating ring 4 is further rotated around the central axis of the first tube 2 or the second tube 3 to move the cam follower protrusion 22 from the transition groove 41c to the second groove 41b. The cam follower protrusion 22 is located in the second groove 41b, that is, in the second position, that is, the valve 1 is in an open state, and the second tube end 3a of the insertion portion 3c of the second tube 3 is completely moved into the first flow path expansion portion 21b, and the sealing member 34b of the second tube 3 is completely separated from the first flow path main flow portion 21a of the first flow path 21. The sealing member 34b of the second tube 3 is separated from the first flow path main flow portion 21a of the first flow path 21, and the fluid cutoff between the first flow path 21 of the first tube 2 and the flow path gap 5 is completely released, and the first flow path 21 of the first tube 2 and the flow path gap 5 are fluidically connected. The fluid in the first flow path 21 of the first tube 2 flows from the first flow path main portion 21a through the flow path gap 5, reaches the second flow path 32 from the opening 33 on the peripheral surface of the insertion portion 3c of the second flow path 32, and is discharged to the outside from the opening of the second tube terminal tube portion 3b.

[0056] A locking mechanism (not shown) may be provided to prevent the cam follower protrusion 22 from being easily moved in the first groove 41a and the second groove 41b. The locking mechanism is a mechanism that fixes the position of the cam follower protrusion 22 relative to the rotating ring 4. For example, a claw-shaped member (not shown) may be provided on the cam follower protrusion 22 to fix the position of the cam follower protrusion 22 relative to the rotating ring 4. In addition, a protrusion may protrude in the first groove 41a and the second groove 41b in a direction perpendicular to the direction in which each groove extends (in the direction along the central axis of the first tube 2) to narrow the width of each of the first groove 41a and the second groove 41b. The locking mechanism may be in any form as long as it can fix the position of the cam follower protrusion 22 relative to the rotating ring 4.

[0057] In the above, as a method of holding the rotating ring 4 on the first tube 2 and the second tube 3 so as to be rotatable around the central axes of the first tube 2 and the second tube 3, an example in which the rotating ring 4 is provided with the holding protrusion 42 and the holding recess 31 is provided on the outer peripheral surface of the second tube 3 has been described. However, as long as the rotating ring 4 can be held on the first tube 2 and the second tube 3 so as to be rotatable around the central axes of the first tube 2 and the second tube 3, various other methods can be adopted.

[0058] For example, the above-mentioned embodiment may be reversed. Figure 4A As shown, a retaining protrusion 35 is arranged on the outer circumferential surface of the second tube 3, and a retaining recess 43 is arranged on the inner circumferential surface of the rotating ring 4. The retaining recess 43 of the rotating ring 4 and the retaining protrusion 35 of the second tube 3 are engaged with each other, so that the rotating ring 4 can be respectively retained on the first tube 2 and the second tube 3 in a manner that can rotate around the central axes of the first tube 2 and the second tube 3.

[0059] Furthermore, for example, Figure 4B As shown, a flange portion 3e covering the rotating ring 4 from the outside is arranged on the second tube 3. In addition, a retaining protrusion 36 can be arranged on the inner peripheral surface of the flange portion 3e of the second tube 3 at a portion where the flange portion 3e of the second tube 3 covers the outer peripheral surface of the rotating ring 4, and a retaining recess 44 can be arranged on the outer peripheral surface of the rotating ring 4. In this case, the retaining recess 44 of the rotating ring 4 and the retaining protrusion 36 of the second tube 3 can also be engaged to hold the rotating ring 4 on the first tube 2 and the second tube 3 in a manner that allows rotation around the central axes of the first tube 2 and the second tube 3.

[0060] And, further, for example, it is also possible to Figure 4B In the example shown in FIG. 1 , the flange portion 3e covering the rotating ring 4 from the outside is arranged on the second tube 3, and the relationship between the recess and the protrusion is reversed. Figure 4C As shown, a retaining recess 37 is arranged on the inner peripheral surface of the flange portion 3e of the second tube 3 at a portion where the flange portion 3e of the second tube 3 covers the outer peripheral surface of the rotating ring 4, and a retaining protrusion 45 is arranged on the outer peripheral surface of the rotating ring 4. In this case, the retaining recess 44 of the rotating ring 4 and the retaining protrusion 36 of the second tube 3 can also be engaged to retain the rotating ring 4 on the first tube 2 and the second tube 3 in a manner that allows rotation around the central axes of the first tube 2 and the second tube 3, respectively.

[0061] (Embodiment of Guide Cam Groove and Cam Follower Protrusion)

[0062] The basic structure of the guide cam groove 41 and the cam follower protrusion 22 as an embodiment of the present invention is as described above, but a locking mechanism may be provided on the basis of the basic structure, and the locking mechanism prevents the cam follower protrusion 22 from moving toward the transition groove 41c when the cam follower protrusion 22 is located in the first groove 41a or the second groove 41b of the guide cam groove 41. For an embodiment having a locking mechanism, refer to FIG. 5A to FIG. 5E The following description will be given of a guide cam groove 141 and a cam follower protrusion 122 having a locking mechanism. The guide cam groove 141 and the cam follower protrusion 122 are the same as the guide cam groove 41 and the cam follower protrusion 22 described above except for the locking mechanism.

[0063] The guide cam groove 141 is composed of a first groove 141a, a second groove 141b, and a transition groove 141c. The first groove 141a, the second groove 141b, and the transition groove 141c are long holes or recesses in which spaces are defined by groove edges arranged opposite to each other in each groove. The transition groove 141c is a groove connecting the first groove 141a and the second groove 141b. The first groove 141a, the second groove 141b, and the transition groove 141c are grooves whose widths are substantially the same as or larger than the width of the cam follower protrusion 122, and the cam follower protrusion 122 can reciprocate along the first groove 141a, the second groove 141b, and the transition groove 141c. Regarding the first groove 141a, the second groove 141b and the transition groove 141c, as long as the cam follower protrusion 122 can move along each groove, it is not necessary to be a through groove hole penetrating the inner and outer surfaces of the rotating ring 4, and it can also be a groove formed by a depression opened on the surface side opposite to the first tube 2 where the cam follower protrusion 122 is arranged.

[0064] FIG. 5A to FIG. 5E An embodiment of the guide cam groove 141 and the cam follower protrusion 122 having a locking mechanism is shown respectively. Figure 5D The cam follower protrusion 122 is viewed from the axial direction. Figure 5C An enlarged view of the guide cam groove 141.

[0065] like FIG. 5A to FIG. 5EAs shown, the first groove 141a and the second groove 141b are grooves formed at a predetermined angle around the central axis of the first tube 2 on a plane perpendicular to the central axis. The first groove 141a and the second groove 141b are formed in parallel at different positions along the central axis of the first tube 2. The first groove 141a is a groove defining a first position when the cam follower protrusion 122 is located at the position of the first groove 141a. The first groove 141a is a groove defining a second position when the cam follower protrusion 122 is located at the position of the second groove 141b. The first groove 141a is located closer to the second tube 3 than the second groove 141b defining the second position in the direction along the central axis of the first tube 2. As described above, the transition groove 141c is a groove that connects the first groove 141a and the second groove 141b, and is therefore a groove opened around the center axis of the first tube 2 at a prescribed angle on a surface having an angle relative to the center axis of the first tube 2, that is, in a manner that connects the respective ends of the first groove 141a and the second groove 141b at an angle relative to the center axis of the first tube 2.

[0066] First of all, Figure 5A and Figure 5B The illustrated embodiment will be described. Figure 5A and Figure 5B 1 is a diagram showing the guide cam groove 141 and the cam follower protrusion 122 of this embodiment, and shows a state where the cam follower protrusion 122 is located in the first groove 141a. In this embodiment, a retaining claw 146 as a locking mechanism is arranged between the first groove 141a and the transition groove 141c and between the second groove 141b and the transition groove 141c. The retaining claw 146 is a convex protrusion protruding from the groove edge of the groove forming the guide cam groove 141 toward the center of the groove. The protruding length of the retaining claw 146 as a protrusion from the groove edge toward the center of the groove can be set so that the cam follower protrusion 122 cannot naturally move from the position in the groove where the cam follower protrusion 122 is currently located in the first groove 141a, the second groove 141b, and the transition groove 141c, and can be caused to move from the current groove to the adjacent groove by relatively moving the rotating ring 4 with respect to the first pipe 2 using a reasonable force suitable for use. The retaining claw 146 is disposed at the curved portion of the guide cam groove 141 where the extending directions of the first groove 141a and the transition groove 141c change. That is, the guide cam groove 141 uses the retaining claw 146 to keep the cam follower protrusion 122 at the first position or the second position through the locking mechanism.

[0067] For example, in particular, Figure 5A As shown, the retaining claw 146a and the retaining claw 146b are arranged at two locations inside the curved portion of the guide cam groove 141, that is, the retaining claw 146a is arranged at the boundary position of the first groove 141a and the transition groove 141c, and the retaining claw 146b is arranged at the boundary position of the second groove 141b and the transition groove 141c. Figure 5B As shown, retaining claws 146a, 146b, 146c, and 146d are arranged on both the inner and outer sides of the two curved portions of the guide cam groove 141. That is, near the boundary between the first groove 141a and the transition groove 141c, the retaining claw 146a is arranged at the inner edge of the curved portion of the guide cam groove 141, and the retaining claw 146c is arranged at the outer edge of the curved portion of the guide cam groove 141. Furthermore, near the boundary between the second groove 141b and the transition groove 141c, the retaining claw 146b is arranged at the inner edge of the curved portion of the guide cam groove 141, and the retaining claw 146d is arranged at the outer edge of the curved portion of the guide cam groove 141. Furthermore, although not shown in the figure, it is also possible to Figure 5A On the contrary, the retaining claws 146 are arranged at two groove edges outside the curved portion of the guide cam groove 141. Figure 5B In the example of , only the holding claw 146c and the holding claw 146d are arranged. The holding claws 146 are formed to protrude from the edge of the guide cam groove toward the center of the guide cam groove 141. In addition, here, the example in which the holding claw 146 is arranged at the curved portion of the guide cam groove 141 is described, but it is also possible to arrange it not at the curved portion of the guide cam groove 141, but at the groove edge of the first groove 141a and the second groove 141b.

[0068] Further, refer to Figure 5C and Figure 5D , further implementation methods are described. Figure 5C 14 is a diagram showing the guide cam groove 141 and the cam follower protrusion 122 according to the present embodiment, and shows a state where the cam follower protrusion 122 is located in the first groove 141 a. Figure 5D Observed from the direction opposite to the cam follower protrusion Figure 5C FIG. 1 is a diagram showing the state of the cam follower protrusion 122. Figure 5A and Figure 5B In the described embodiment, the locking mechanism is described as being composed of only the retaining claw 146. Here, it is composed of the retaining claw 146 and the receiving groove 122a arranged on the cam follower protrusion 122. The guide cam groove 141 and the retaining claw 146 are as described above. The receiving groove 122a is a groove arranged at a position of the cam follower protrusion 122 that is opposite to the groove edge of the guide cam groove 141, and is a groove that can make the cam follower protrusion 122 stay at a predetermined position by accommodating the retaining claw 146 and engaging with the retaining claw 146. The retaining claw 146 is a protrusion shape that protrudes from the groove edge of the first groove 141a and the second groove 141b to the inside of the groove, and the receiving groove 122a is arranged on the circumference of the cam follower protrusion 122 on the side opposite to the groove edge of the first groove 141a and the second groove 141b, and is a recessed groove that can engage with the cam follower protrusion 122 and has a groove depth in a direction away from the groove edge.

[0069] That is, in reference Figure 5A and Figure 5B In the described embodiment, the locking mechanism not only allows the cam follower protrusion 122 to stay in the specified area of ​​the first groove 141a and the second groove 141b isolated by the retaining claw 146, but also allows the cam follower protrusion 122 to stay in the portion where the retaining claw 146 is arranged. Therefore, in this embodiment, the retaining claw 146 is not arranged in the curved portion of the guide cam groove 141, but is arranged inside the first groove 141a and the second groove 141b. Even when the retaining claw 146 is accommodated in the accommodating groove 122a of the cam follower protrusion 122, the cam follower protrusion 122 is reliably present in the first groove 141a and the second groove 141b. Figure 5C and Figure 5D In the example shown, the retaining claws 146a, 146c and the retaining claws 146b, 146d are arranged on the groove edges on both sides of the first groove 141a and the groove edges on both sides of the second groove 141b, but the retaining claws 146 do not need to be arranged on the groove edges on both sides of the first groove 141a and the second groove 141b. It is also possible that one retaining claw 146 is arranged on either side of the groove edge defining the first groove 141a and one on either side of the groove edge defining the second groove 141b.

[0070] Next, refer to Figure 5E , for FIG. 5A to FIG. 5D The illustrated embodiment will be described as an embodiment in which the cam follower protrusion 122 is more firmly retained in the first groove 141 a and the second groove 141 b . Figure 5E The structure of the guide groove 141 shown is similar to FIG. 5A to FIG. 5D The implementation method is the same as Figure 5E The cam follower 122 is also shown in a state where it is located inside the first groove 141a. In this embodiment, the guide cam groove 141 has a retaining claw 146e extending from the direction of the transition groove 141c toward the first groove 141a and a retaining claw 146f extending from the direction of the transition groove 141c toward the second groove 141b. The retaining claw 146e has elasticity and can be bent toward the groove edge of the first groove 141a. When the retaining claw 146e is bent, the front end side of the retaining claw 146e can be accommodated in the retreat groove 147a arranged at the groove edge of the first groove 141a. Similarly, the retaining claw 146f also has elasticity and can be bent toward the groove edge of the second groove 141b. When the retaining claw 146f is bent, the front end side of the retaining claw 146f can be accommodated in the retreat groove 147b arranged at the groove edge of the second groove 141b.

[0071] Under normal conditions, the retaining claw 146e extends between the first groove 141a and the transition groove 141c in a manner that limits the groove width, and becomes an obstacle to the movement of the cam follower protrusion 122 between the first groove 141a and the transition groove 141c. Similarly, the retaining claw 146f extends between the second groove 141b and the transition groove 141c in a manner that limits the groove width, and becomes an obstacle to the movement of the cam follower protrusion 122 between the second groove 141b and the transition groove 141c.

[0072] On the other hand, when the front end side of the retaining claw 146e is received in the retreat groove 147a and the front end side of the retaining claw 146f is received in the retreat groove 147b, the retaining claw 146e and the retaining claw 146f will not become obstacles to the movement of the cam follower protrusion 122 between the first groove 141a and the transition groove 141c and between the second groove 141b and the transition groove 141c, and the cam follower protrusion 122 can move between the first groove 141a and the transition groove 141c and between the second groove 141b and the transition groove 141c.

[0073] Therefore, the cam follower protrusion 122 can be easily accommodated from the transition groove 141c to the first groove 141a without a large load. When the cam follower protrusion 122 is temporarily accommodated in the first groove 141a, the cam follower protrusion 122 cannot naturally return from the first groove 141a to the transition groove 141c. Figure 5E Similarly, the cam follower protrusion 122 can be easily received in the second groove 141b from the transition groove 141c without a large load, and when the cam follower protrusion 122 is temporarily received in the second groove 141b, the cam follower protrusion 122 cannot naturally return to the transition groove 141c from the second groove 141b.

[0074] After the cam follower protrusion 122 is accommodated in the first groove 141a or the second groove 141b, the holding claw 146e can be bent toward the retreat groove 147a or the holding claw 146f can be bent toward the retreat groove 147b to ensure the groove width between the first groove 141a and the transition groove 141c or between the second groove 141b and the transition groove 141c, thereby urging the movement of the cam follower protrusion 122. In the locking mechanism of this embodiment, the cam follower protrusion 122 can be actively and firmly retained in the first groove 141a and the second groove 141b.

[0075] This application claims priority from Japanese Patent Application No. 2022-139810 filed on September 2, 2022 and Japanese Patent Application No. 2022-195291 filed on December 7, 2022, the contents of which are incorporated herein by reference as a part of this application.

[0076] Description of symbols

[0077] 1: valve; 2: 1st tube; 2a: 1st tube end; 2b: 1st tube end opening; 21: 1st flow path; 22, 122: cam follower protrusion; 3: 2nd tube; 3a: 2nd tube end; 3b: 2nd tube end; 3c: inserting portion; 3d: groove; 3e: flange portion; 31: retaining recess; 32: 2nd flow path; 33: 2nd flow path outlet; 34a, 34b: sealing component; 35, 36: retaining protrusion; 4: rotating ring; 41, 141: guide cam groove; 42, 45: retaining protrusion; 43, 44: retaining recess; 122a: accommodating groove; 146: retaining claw; 147: retreat groove; 5: flow path gap; D1: insertion length (when closed); D2: insertion length (when open).

Claims

1. A valve, comprising: A first tube having a first tube end portion, the first tube having a cylindrical shape and having a first flow path extending in the direction of the axis of the cylinder, the first flow path forming an opening at the first tube end portion; a second tube extending coaxially with the axis and having a second tube end portion, the second tube having a cylindrical shape and having a second flow path extending in the direction of the axis inside the second tube, the insertion portion of the second tube end portion being inserted into the first flow path of the first tube from the opening of the first tube; as well as a rotating ring held by the first tube and the second tube on the outer peripheral surfaces of the first tube and the second tube, respectively, in a manner rotatable around the axis; in, The second flow path does not reach the second pipe end portion but extends toward the inner wall of the first flow path at the insertion portion of the second flow path, thereby forming an opening at the insertion portion of the second flow path. A cam follower protrusion is provided on the surface of the first tube, The rotating ring has a guide cam groove for accommodating the cam follower protrusion, and the guide cam groove causes the cam follower protrusion to move between a first position and a second position by the rotation of the rotating ring, so that the first tube and the second tube move relative to each other, and in the first position, the insertion portion of the second tube end of the second tube is the longest, and in the second position, the insertion portion of the second tube end of the second tube is shorter than in the first position, The valve has a closed state in the first position where the first flow path is not fluidically connected to the second flow path, and has an open state in the second position where the first flow path is fluidically connected to the second flow path.

2. The valve according to claim 1, wherein: The guide cam groove is composed of a first groove, a second groove and a transition groove, the first groove defines the first position close to the second tube in the direction of the axis, the first groove is opened on a plane perpendicular to the axis along the direction around the axis, the second groove defines the second position farther from the second tube than the first position in the direction of the axis, the second groove is opened on a plane perpendicular to the axis along the direction around the axis, and the transition groove connects the first groove and the second groove.

3. The valve according to claim 1, wherein: The second tube has a retaining protrusion on the outer peripheral surface or a retaining recess opened in a direction around the axis. The rotating ring has a holding protrusion engaged with the holding recess or a holding recess opened in a direction around the axis in a manner engaged with the holding protrusion. The engagement between the holding protrusion and the holding recess allows the rotating ring to be held so as to be rotatable relative to the second pipe.

4. The valve according to claim 1, wherein: The first flow path has: a first flow path expansion portion, one end of which forms the opening; and a first flow path main flow portion having a diameter smaller than that of the first flow path enlarged portion, the first flow path main flow portion being connected to the other end of the first flow path enlarged portion, The second tube has: a first sealing member, an outer surface of which is always in contact with the inner surface of the first flow path expansion portion; and The outer surface of the second sealing component contacts the inner surface of the main flow portion of the first flow path when the valve is in the closed state, and does not contact the inner surface of the main flow portion of the first flow path when the valve is in the open state.

5. The valve according to any one of claims 1 to 4, wherein: The valve is mounted on the filter container. The first flow path of the first tube communicates with the interior of the filter container at a side opposite to the first tube end. The first flow path of the first tube is upstream, and the second flow path of the second tube is downstream. The second tube has a second tube terminal portion as an end portion on the side opposite to the second tube end portion, and the second tube terminal portion has an opening of the second flow path. In the open state, the valve discharges the fluid in the filter container from the opening of the second tube end pipe portion via the first flow path and the second flow path.

6. The valve according to claim 1, wherein: The guide cam groove has a locking mechanism including a holding claw protruding from a groove edge defining the guide cam groove, and the cam follower protrusion is stopped at the first position or the second position by the locking mechanism.

7. The valve according to claim 6, wherein: The locking mechanism has a receiving groove, which is arranged on the cam follower protrusion and receives the holding claw.

8. A filter container having a valve, in, The valve has: A first tube having a first tube end portion, the first tube having a cylindrical shape and having a first flow path extending in the direction of the axis of the cylinder, the first flow path forming an opening at the first tube end portion, and the first flow path communicating with the interior of the filter container on a side opposite to the first tube end portion; a second tube extending coaxially with the axis and having a second tube end portion, the second tube having a cylindrical shape and having a second flow path extending in the direction of the axis inside the second tube, the insertion portion of the second tube end portion being inserted into the first flow path of the first tube from the opening of the first tube; as well as a rotating ring which is held on the outer peripheral surfaces of the first tube and the second tube by the first tube and the second tube respectively in a manner rotatable around the axis, The second flow path does not reach the second pipe end portion but extends toward the inner wall of the first flow path at the insertion portion of the second flow path, thereby forming an opening at the insertion portion of the second flow path. A cam follower protrusion is provided on the surface of the first tube, The rotating ring has a guide cam groove for accommodating the cam follower protrusion, and the guide cam groove causes the cam follower protrusion to move between a first position and a second position by the rotation of the rotating ring, so that the first tube and the second tube move relative to each other, and in the first position, the insertion portion of the second tube end of the second tube is the longest, and in the second position, the insertion portion of the second tube end of the second tube is shorter than in the first position, The valve has a closed state in the first position where the first flow path is not fluidically connected to the second flow path, and has an open state in the second position where the first flow path is fluidically connected to the second flow path.

9. The filter container according to claim 8, wherein: The guide cam groove is composed of a first groove, a second groove and a transition groove, the first groove defines the first position close to the second tube in the direction of the axis, the first groove is opened on a plane perpendicular to the axis along the direction around the axis, the second groove defines the second position farther from the second tube than the first position in the direction of the axis, the second groove is opened on a plane perpendicular to the axis along the direction around the axis, and the transition groove connects the first groove and the second groove.

10. The filter container according to claim 8, wherein: The second tube has a retaining protrusion on the outer peripheral surface or a retaining recess opened in a direction around the axis. The rotating ring has a holding protrusion engaged with the holding recess or a holding recess opened in a direction around the axis in a manner engaged with the holding protrusion. The engagement between the holding protrusion and the holding recess allows the rotating ring to be held so as to be rotatable relative to the second pipe.

11. The filter container according to claim 8, wherein: The first flow path has: a first flow path expansion portion, one end of which forms the opening; and a first flow path main flow portion having a diameter smaller than that of the first flow path enlarged portion, the first flow path main flow portion being connected to the other end of the first flow path enlarged portion, The second tube has: a first sealing member, an outer surface of which is always in contact with the inner surface of the first flow path expansion portion; and The outer surface of the second sealing component contacts the inner surface of the main flow portion of the first flow path when the valve is in the closed state, and does not contact the inner surface of the main flow portion of the first flow path when the valve is in the open state.

12. The filter container according to any one of claims 8 to 11, wherein: In the valve, the first flow path of the first tube is upstream, and the second flow path of the second tube is downstream. The second tube has a second tube terminal portion as an end portion on the side opposite to the second tube end portion, and the second tube terminal portion has an opening of the second flow path. In the open state, the fluid in the filter container is discharged from the opening of the second tube end pipe portion via the first flow path and the second flow path.

13. The filter container according to claim 8, wherein: The guide cam groove has a locking mechanism including a holding claw protruding from a groove edge defining the guide cam groove, and the cam follower protrusion is stopped at the first position or the second position by the locking mechanism.

14. The filter container according to claim 13, wherein: The locking mechanism has a receiving groove, which is arranged on the cam follower protrusion and receives the holding claw.

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