JP6487707B2 - Fluid damper device and damper equipped device - Google Patents

Description

  The present invention relates to a fluid damper device in which a fluid is filled between a case and a rotating shaft, and a damper-equipped device.

  In a fluid damper device in which a fluid such as oil is filled between a case and a rotating shaft, a valve body is supported on the outer peripheral side of the rotating shaft, and in the cylindrical body portion of the case, a partitioning convex portion radially inward Is protruding. In such a fluid damper device, when the rotating shaft rotates in one direction, the fluid tends to be compressed between the valve body and the partitioning convex portion, so that a load is applied to the rotating shaft (see Patent Document 1).

JP 2010-151306 A

  In the fluid damper device described in Patent Document 1, if a gap is generated between the case partitioning convex portion and the outer peripheral surface of the rotating shaft, the fluid leaks and a sufficient load cannot be obtained. Therefore, the dimensional accuracy of the case and the rotating shaft is increased to prevent the fluid from leaking, but it is difficult to sufficiently close the space between the partitioning convex portion and the outer peripheral surface of the rotating shaft.

  In view of the above problems, an object of the present invention is to easily suppress the fluid from leaking between the case and the rotating shaft when the rotating shaft is rotated in the direction in which the load is generated. An object of the present invention is to provide a fluid damper device and a damper-equipped device including the fluid damper device.

In order to solve the above problems, a fluid damper device according to the present invention includes a rotating shaft, a valve body supported on the outer peripheral side of the rotating shaft, a cylindrical body surrounding the rotating shaft, and the A case having a partition convex portion protruding radially inward from the body portion, and a fluid filled in the case, the case facing an end surface on one side in the axial direction of the rotation shaft A second rib protruding toward the bottom wall and in contact with the bottom wall extending in a radial direction at the end surface of the rotating shaft, and at a radially inner end of the partitioning convex portion The first rib protruding toward the outer peripheral surface of the rotating shaft and in contact with the outer peripheral surface extends in the axial direction.

In the present invention, since the first rib extending in the axial direction is formed at the radially inner end portion of the partition projection, when the fluid damper device is assembled, the outer peripheral surface of the rotary shaft and the partition projection The first ribs are appropriately crushed according to the interval between Therefore, the space between the outer peripheral surface of the rotating shaft and the partitioning convex portion can be reliably packed. Therefore, when the rotating shaft is rotated in the direction in which the load is generated, it is possible to easily suppress the fluid from leaking between the outer peripheral surface of the rotating shaft and the radially inner end of the partitioning convex portion. Further, when the fluid damper device is assembled, the second rib is appropriately crushed according to the distance between the rotation shaft and the bottom wall. Therefore, the space between the rotating shaft and the bottom wall can be reliably packed. Therefore, when the rotating shaft is rotated in the direction in which the load is generated, it is possible to easily suppress the fluid from leaking between the rotating shaft and the bottom wall.

  In the present invention, it is preferable that the first rib has a circular arc surface along the outer peripheral surface of the rotating shaft at the tip side in the protruding direction of the first rib. That is, when assembling the fluid damper device, the first rib is preferably pressed and crushed by the outer peripheral surface of the rotating shaft. According to such a configuration, the first rib has an appropriate height (projection dimension). Therefore, the space between the outer peripheral surface of the rotating shaft and the partitioning convex portion can be reliably packed over the entire axial direction. Therefore, when the rotating shaft is rotated in the direction in which the load is generated, it is possible to easily suppress the fluid from leaking between the outer peripheral surface of the rotating shaft and the partitioning convex portion.

  In this invention, it is preferable that the said partition convex part and the said valve body are each provided in the several location of the circumferential direction. In the case of such a configuration, the inside of the case is divided into a plurality in the circumferential direction, so that a large load can be generated. On the other hand, when a plurality of partitioning convex portions are provided, the number of locations where fluid leaks from between the outer peripheral surface of the rotating shaft and the radially inner end of the partitioning convex portion is increased. Since this leakage can be easily suppressed, the disadvantage of dividing the inside of the case into a plurality in the circumferential direction can be eliminated.

In the present invention, before Symbol projections and the first rib partition is preferably connected to the bottom wall. According to such a configuration, it is possible to reliably suppress fluid leakage between the partitioning convex portion and the bottom wall.

In the present invention, the rotating shaft includes a flange portion facing the other end portion in the axial direction of the partition convex portion, and the end portion of the partition convex portion projects toward the flange portion. It is preferable that the 3rd rib which contact | connects the said flange part is extended in radial direction. According to this configuration, when the fluid damper device is assembled, the third rib is appropriately crushed according to the distance between the partitioning convex portion and the flange portion. Therefore, the space between the partitioning convex portion and the flange portion can be reliably packed. Therefore, when the rotating shaft is rotated in the direction in which the load is generated, it is possible to easily suppress the fluid from leaking between the end of the partitioning convex portion and the flange portion.

  In the damper-equipped device including the fluid damper device according to the present invention, for example, a configuration in which an opening / closing member that rotates with respect to the device main body is attached to the rotating shaft can be employed.

  In the present invention, the opening / closing member is a toilet seat of a Western-style toilet.

In the present invention, since the first rib extending in the axial direction is formed at the radially inner end portion of the partition projection, when the fluid damper device is assembled, the outer peripheral surface of the rotary shaft and the partition projection Therefore, the first rib is appropriately crushed according to the distance between the outer peripheral surface of the rotating shaft and the radially inner end of the partitioning convex portion. Therefore, when the rotating shaft is rotated in the direction in which the load is generated, it is possible to easily suppress the fluid from leaking between the outer peripheral surface of the rotating shaft and the radially inner end of the partitioning convex portion. Further, when the fluid damper device is assembled, the second rib is appropriately crushed according to the distance between the rotation shaft and the bottom wall. Therefore, the space between the rotating shaft and the bottom wall can be reliably packed. Therefore, when the rotating shaft is rotated in the direction in which the load is generated, it is possible to easily suppress the fluid from leaking between the rotating shaft and the bottom wall.

It is explanatory drawing of the western style toilet unit provided with the western style toilet bowl in which the fluid damper apparatus to which this invention is applied is mounted. It is a perspective view of a fluid damper device to which the present invention is applied. It is a cross-sectional view of a fluid damper device to which the present invention is applied. It is a longitudinal cross-sectional view of the fluid damper apparatus to which this invention is applied. It is explanatory drawing which looked at the member which comprises the fluid damper apparatus to which this invention is applied from the other side of the axis line L direction. It is the perspective view which looked at the valve body etc. of the fluid damper apparatus to which this invention is applied from the other side of an axial direction. It is a side view after performing a rotation stopping process to the fluid damper device to which the present invention is applied.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, in the rotor 30, the direction in which the central axis of the rotation shaft 40 extends is defined as the direction of the axis L, and in the direction of the axis L, the side opposite to the side where the rotation shaft 40 protrudes from the case 20 Description will be made assuming that one side L1 and the side where the rotating shaft 40 protrudes from the case 20 are the other side L2.

(Overall configuration of device with damper and fluid damper device 10)
FIG. 1 is an explanatory diagram of a Western-style toilet unit 100 including a Western-style toilet 1 equipped with a fluid damper device 10 to which the present invention is applied. FIG. 2 is a perspective view of a fluid damper device 10 to which the present invention is applied. FIGS. 2A and 2B are perspective views of the fluid damper device 10 as viewed from the other side L2 in the direction of the axis L, and the fluid. It is the perspective view which looked at the damper apparatus 10 from the one side L1 of the axis line L direction.

  A western toilet unit 100 shown in FIG. 1 includes a western toilet 1 (equipment with a damper) and a water tank 3. The western toilet 1 includes a toilet body 2 (device body), a resin toilet seat 5 (opening / closing member), a resin toilet lid 6 (opening / closing member), a unit cover 7, and the like. A fluid damper device 10 to be described later is built in the unit cover 7 as a valve seat and a valve lid. The toilet seat 5 and the toilet lid 6 are connected to the toilet body 2 via the fluid damper device 10, respectively. ing. Here, since the fluid damper device 10 connected to the toilet seat 5 and the fluid damper device 10 connected to the toilet lid 6 can be of the same configuration, in the following description, the fluid damper device 10 is connected to the toilet seat 5. The fluid damper device 10 will be mainly described.

  As shown in FIG. 2, the fluid damper device 10 has a cylindrical fluid damper device main body 10a on one side L1. A shaft-like connecting portion 10 b (output shaft) protrudes from the fluid damper device main body 10 a to the other side L 2, and the connecting portion 10 b is connected to the toilet seat 5. Such a fluid damper device 10 generates a force (load) against the toilet seat 5 when the toilet seat 5 is standing so as to fall on the toilet body 2 and reduces the speed at which the toilet seat 5 falls. The connecting portion 10b has a flat surface 10c opposite to each other. The flat surface 10c prevents the toilet seat 5 from being idle around the connecting portion 10b.

(Overall configuration of fluid damper device 10)
FIG. 3 is a cross-sectional view of a fluid damper device 10 to which the present invention is applied. FIGS. 3A, 3B, and 3C are fluid dampers on a plane along the axis L at a position passing through the valve body 50. FIG. FIG. 6 is a cross-sectional view when the device 10 is cut, a cross-sectional view when the fluid damper device 10 is cut along a plane along the axis L at a position passing through the partitioning convex portion 23, and an enlarged cross-sectional view showing the vicinity of the cover 60. . FIG. 4 is a longitudinal sectional view of the fluid damper device 10 to which the present invention is applied. FIGS. 4A, 4B, and 4C are diagrams showing fluids on a plane perpendicular to the axis L at a position passing through the valve body 50. FIG. A sectional view when the damper device 10 is cut, a sectional view when the partitioning convex portion 23 is cut along a plane orthogonal to the axis L at a position passing through the first rib 15 of the partitioning convex portion 23, and perpendicular to the axis L It is sectional drawing when the 1st rib 15 is cut | disconnected in the surface to perform. FIG. 5 is an explanatory view of the members constituting the fluid damper device 10 to which the present invention is applied as viewed from the other side L2 in the direction of the axis L. FIGS. The exploded perspective view of the state where the cover 60 is removed from the other side L2 in the direction of the axis L, It is the perspective view seen from the other side L2 of the axis line L direction. FIG. 6 is a perspective view of the valve body 50 and the like of the fluid damper device 10 to which the present invention is applied as viewed from one side L1 in the axis L direction.

  As shown in FIGS. 3, 4, and 5, the fluid damper device 10 includes a cylindrical case 20 having a bottom wall 21 on one side L <b> 1 and a rotor 30 in which the one side L <b> 1 is disposed inside the case 20. And an annular cover 60 that closes the opening 29 of the case 20 on the other side L2. In this embodiment, both the case 20 and the cover 60 are resin molded products.

  The case 20 has a cylindrical body 22 extending from the outer peripheral edge of the bottom wall 21 toward the other side L2. The body portion 22 has the same inner diameter in the circumferential direction. In the case 20, a circular recess 210 is formed in the center of the bottom wall 21 so as to be recessed in the one side L <b> 1 and rotatably support the end portion 49 on the one side L <b> 1 of the rotating shaft 40 of the rotor 30.

  Two partitioning convex portions 23 protrude radially inward from the inner peripheral surface 220 of the body portion 22. The two partitioning convex portions 23 are formed at angular positions shifted by 180 ° in the circumferential direction. In this embodiment, each of the two partitioning convex portions 23 is connected to the bottom wall 21 at one end L1. The partitioning convex portion 23 has a trapezoidal cross section, and the circumferential dimension (thickness) decreases from the radially outer side to the inner side.

  The rotor 30 includes a rotating shaft 40 having one side L1 in the axis L direction disposed inside the case 20 and a valve body 50 held on the outer peripheral surface side of the rotating shaft 40. The rotating shaft 40 is made of resin, and has a round bar-shaped first shaft portion 41 located inside the case 20 and a second shaft portion 42 extending on the other side L2 from the first shaft portion 41. ing. The first shaft portion 41 has a larger outer diameter than the end portion 49 on one side L1 of the rotating shaft 40, and the second shaft portion 42 has a larger outer diameter than the first shaft portion 41. The second shaft portion 42 may have an outer diameter smaller than that of the first shaft portion 41.

  In the rotary shaft 40, between the first shaft portion 41 and the second shaft portion 42, a circular first flange portion 43 adjacent to the first shaft portion 41 on the other side L 2, and the first flange portion 43. Is formed with a circular second flange portion 44 facing the other side L2 at a predetermined interval. For this reason, an annular circumferential groove 45 is formed between the first flange portion 43 and the second flange portion 44. Therefore, if the O-ring 70 is attached to the circumferential groove 45 and the first shaft portion 41 of the rotating shaft 40 is inserted into the inside of the case 20, the O-ring 70 is included in the inner peripheral surface 220 of the body portion 22 of the case 20. The space between the case 20 and the rotating shaft 40 is sealed by contacting the portion 229 positioned on the one side L1 in a compressed state. In addition, a space defined by the bottom wall 21 and the first flange portion 43 facing the other side L <b> 2 in the first shaft portion 41 is sealed as the damper chamber 11 inside the case 20. At that time, the damper chamber 11 is filled with a fluid 12 (viscous fluid) such as oil.

  Then, if the cover 60 is inserted between the 2nd axial part 42 of the rotating shaft 40, and the trunk | drum 22 of the case 20, and the cover 60 is fixed, the fluid damper apparatus 10 will be comprised. At that time, an annular washer 75 is disposed between the cover 60 and the second flange portion 44 of the rotating shaft 40.

  In this state, the end portion 49 on one side L1 of the rotating shaft 40 is rotatably supported by the recess 210 of the bottom wall 21 of the case 20, and the second shaft portion 42 is located inside the hole 61 of the cover 60. It is rotatably supported. Moreover, a part of 2nd axial part 42 penetrates the hole 61 of the cover 60, and the connection part 10b is comprised.

(Detailed configuration inside the damper chamber 11)
As shown in FIGS. 3 and 4, in the damper chamber 11, the radially inner end portions 231 of the two partitioning convex portions 23 of the case 20 are in contact with the outer peripheral surface 410 of the first shaft portion 41 of the rotating shaft 40.

As shown in FIGS. 3, 4, 5, and 6, the outer peripheral surface 410 of the first shaft portion 41 of the rotating shaft 40.
In FIG. 2, valve body supporting convex portions 46 projecting radially outward are formed at two positions shifted by 180 ° in the circumferential direction. Each of the two valve body supporting convex portions 46 includes a valve body. 50 is supported. Each of the two valve body support convex portions 46 extends in the axis L direction from the end of the one side L1 of the rotating shaft 40 to the first flange portion 43, and the two valve body support convex portions 46 are In either case, the end portion of the other side L2 is connected to the first flange portion 43.

  The valve body supporting convex portion 46 includes a first convex portion 461 projecting radially outward and a second convex portion projecting radially outward at a position adjacent to the first convex portion 461 in the second direction B. 462, and a valve body support groove 460 is formed between the first convex portion 461 and the second convex portion 462. As for the 1st convex part 461 and the 2nd convex part 462, as for all, the edge part of the other side L2 is connected with the 1st flange part 43. FIG.

  The valve body support groove 460 has an arc shape whose inner peripheral surface is curved over an angular range exceeding about 180 °, and the valve body 50 is supported by the valve body support groove 460. In this embodiment, the second convex portion 462 is wider in the circumferential direction than the first convex portion 461. Further, the distal end portion of the first convex portion 461 is located on the radially inner side from the distal end portion of the second convex portion 462. Further, the valve body supporting convex portion 46 has a circumferential width that is narrower on the radially inner side than on the radially outer side.

  The valve body 50 is supported by the valve body support groove 460 so as to be rotatable around an axis parallel to the axis L, and protrudes radially outward from the base 51 and covers the first protrusion 461. And a distal end portion 52 having a convex cross section inclined toward the first direction A, and a radially outer portion of the distal end portion 52 is located on the radially outer side of the first convex portion 461 and the second convex portion 462. To do.

  The valve body 50 extends in the direction of the axis L like the valve body supporting convex portion 46, and the end portion 56 on the other side L <b> 2 of the valve body 50 is in contact with the first flange portion 43. Therefore, since there is almost no gap between the valve body 50 and the first flange portion 43, the fluid 12 does not pass between the valve body 50 and the first flange portion 43. On the other hand, the end portion 57 on the one side L1 of the valve body 50 is positioned slightly on the other side L2 from the end portion on the one side L1 of the convex portion 46 for supporting the valve body. For this reason, a slight gap is provided between the end portion 57 of the valve body 50 and the bottom wall 21 of the case 20 on one side L1 with respect to the valve body 50. Thus, the fluid 12 can pass slightly through the gap.

(Sealing structure in the direction of the axis L in the damper chamber 11)
3 and 4, a gap may exist between the radially inner end 231 of the partitioning convex portion 23 and the outer peripheral surface 410 of the first shaft portion 41 of the rotating shaft 40. However, a first rib 15 (see FIGS. 4 and 5B, 5C) is formed on the radially inner end 231 of the partitioning convex portion 23, and the first rib 15 has a rotating shaft 40. Is in contact with the outer peripheral surface 410 of the first shaft portion 41. The first rib 15 extends in the axis L direction at the radially inner end portion 231 of the partitioning convex portion 23. Further, the first rib 15 is formed over the entirety of the radially inner end 231 of the partitioning convex portion 23 in the axis L direction, and is connected to the bottom wall 21.

  When the fluid damper device 10 is configured, the first rib 15 is crushed to a state corresponding to the gap between the radially inner end 231 of the partitioning convex portion 23 and the outer peripheral surface 410 of the first shaft portion 41. For this reason, the first rib 15 has a circular arc surface 150 along the outer peripheral surface 410 of the first shaft portion 41 of the rotating shaft 40 at the tip side in the protruding direction of the first rib 15.

That is, for example, the first rib 15 is formed in a triangular cross-section as shown by a one-dot chain line in FIG. 4C, but when the fluid damper device 10 is assembled, the tip side of the first rib 15 is The outer peripheral surface 410 of the first shaft portion 41 is pressed and crushed to form an arcuate surface 150 along the outer peripheral surface 410 of the first shaft portion 41 of the rotating shaft 40. For this reason, the fluid 12 does not pass between the radially inner end 231 of the partitioning convex portion 23 and the outer peripheral surface 410 of the first shaft portion 41.

  Next, as shown in FIGS. 3 and 6, the end surface 417 on the one side L1 of the first shaft portion 41 and the end portion 467 on the one side L1 of the valve body supporting convex portion 46 constitute a continuous surface. It faces the bottom wall 21 in the axis L direction. Here, a gap may exist between the end surface 417 of the first shaft portion 41 and the end portion 467 of the valve body supporting convex portion 46 and the bottom wall 21 of the case 20. A second rib 16 (see FIG. 6) extending in the radial direction is formed on the end surface 417 on one side L1 and the end portion 467 on one side L1 of the valve body supporting convex portion 46. When the fluid damper device 10 is configured, the second rib 16 is in a state corresponding to the gap between the end surface 417 of the first shaft portion 41 and the end portion 467 of the valve body supporting convex portion 46 and the bottom wall 21 of the case 20. Until crushed. Therefore, the fluid 12 does not pass between the end surface 417 of the first shaft portion 41 and the bottom wall 21 and between the end surface 417 of the valve body supporting convex portion 46 and the bottom wall 21.

  In FIG. 3, a slight gap may exist between the end 236 on the other side L <b> 2 of the partitioning convex portion 23 and the first flange portion 43 of the rotating shaft 40, but the partitioning convex portion 23. A third rib 17 (FIGS. 5B and 5C) extending in the radial direction is formed at the end 236 of the other side L2. When the fluid damper device 10 is configured, the third rib 17 is crushed to a state corresponding to the gap between the end 236 of the partitioning convex portion 23 and the first flange portion 43 of the rotating shaft 40. For this reason, the fluid 12 does not pass between the end 236 of the partitioning convex portion 23 and the first flange portion 43 of the rotating shaft 40.

(Fixing structure of the cover 60 to the case 20)
FIG. 7 is a side view of the fluid damper device 10 to which the present invention has been applied, after the anti-rotation process is performed, and FIGS. 7A and 7B are side views when the adhesion process is performed as the anti-rotation process. It is a side view at the time of performing a caulking process as a figure and a rotation stopping process.

  As shown in FIGS. 3 and 5, in the fluid damper device 10 of this embodiment, when fixing the cover 60 to the case 20, the male screw 66 formed on the outer peripheral surface 62 of the cover 60 and the inner peripheral surface of the case 20 are used. Of 220, an internal thread 226 formed in a portion 228 adjacent to the opening 29 is used. Further, in the inner peripheral surface 220 of the case 20, the inner diameter of the portion 228 located on the other side L2 (the portion where the female screw 226 is formed) is larger than the inner diameter of the portion 229 located on the one side L1, and the other side Between the part 228 located in L2 and the part 229 located in one side L1, the cyclic | annular step part 227 which faces the other side L2 is formed. For this reason, in this embodiment, when the cover 60 is fixed to the case 20, the cover 60 is brought into contact with the stepped portion 227, whereby the amount of pressing of the cover 60 into the case 20 is controlled.

  According to such a configuration, the fixing strength between the cover 60 and the case 20 is high, and the cover 60 can be appropriately fixed to the case 20. Therefore, even when the pressure in the damper chamber 11 increases excessively, it is difficult for the cover 60 to be pushed out. In addition, even if the dimensions of the cover 60 vary, the amount of pressing of the cover 60 into the case 20 is unlikely to vary, so that the cover 60 can be properly fixed to the case 20. For this reason, since the situation where the amount of pushing the cover 60 into the case 20 fluctuates and the volume in the damper chamber 11 fluctuates hardly occurs, the damper performance hardly varies. Further, the inner peripheral surface 220 of the case 20 is formed with a step portion 227 that contacts the cover 60 at a position adjacent to the female screw 226 on one side L1 in the axis L direction. The amount of pushing into can be stabilized.

In the present embodiment, in the cover 60, the portion having the largest outer diameter in the direction of the axis L is a portion where the male screw 66 is formed. More specifically, the cover 60 has a constant outer diameter throughout the axis L direction, and a male thread 66 is formed on the outer peripheral surface 62 of the cover 60 over the entire axis L direction. Therefore, the entire cover 60 can be screwed to the case 20, and the cover 60 is entirely located inside the case 20 in a state where the cover 60 is screwed to the case 20. Therefore, the dimension of the fluid damper device 10 in the axis L direction can be reduced. Further, since the entire cover 60 can be screwed to the case 20, the cover 60 can be firmly fixed to the case 20.

  The end surface 63 on the other side L2 of the cover 60 is formed with recesses 64 at a plurality of locations in the circumferential direction. In this embodiment, the inner peripheral edge of the end surface 63 on the other side L2 of the cover 60 is formed with recesses 64 at three locations in the circumferential direction, and these recesses 64 are provided with a jig (shown) when the cover 60 is screwed. The cover 60 is rotated by engaging.

  The case 20 and the cover 60 thus configured are resin molded products. For this reason, when the case 20 is molded, the female screw 226 and the like are formed at the same time, and when the cover 60 is molded, the male screw 66 and the recess 64 are formed at the same time. Therefore, the cost of the fluid damper device 10 can be reduced. In addition, unlike the case where the male screw 66 is formed by cutting or the like, the end surface of the other side L2 of the cover 60 can be provided with an annular flat portion extending continuously along the outer peripheral edge. For this reason, since the cyclic | annular flat part of the cover 60 can be contact | abutted to the cyclic | annular step part 227 of the case 20, the pushing amount in the case 20 of the cover 60 can be controlled appropriately. Note that, in the outer peripheral surface of the case 20, a portion that overlaps with the female screw 226 in the radial direction is preferably formed with a tapered surface inclined in a direction in which the opening 29 side has a small diameter. This can be used as a taper when separating the molding die and the case 20. Therefore, when the mold and the case 20 are separated from each other, a large stress is not easily applied to a portion of the case 20 where the female screw 226 is formed, and thus the female screw 226 is not easily deformed.

  In the present embodiment, an anti-rotation process is performed between the cover 60 and the case 20. For example, an adhesion process or a caulking process is used as the anti-rotation process. For this reason, when the rotating shaft 40 rotates, it can prevent that the cover 60 rotates and fixation with respect to the case 20 loosens.

  When an adhesive process is used as the anti-rotation process, an anaerobic adhesive or the like is applied to at least one of the male screw 66 of the cover 60 and the female screw 226 of the case 20, and then the cover 60 is screwed into the case 20. . According to such a configuration, as shown in FIG. 7A, after the fluid damper device 10 is completed, the entire cover 60 is located inside the case 20, so that the cover 60 is not at all from the case 20 to the other side L <b> 2. The structure does not protrude.

  On the other hand, when the caulking process is performed as the anti-rotation process, for example, a heating head or the like is brought into contact with the end portion of the other side L2 of the case 20 to be plastically deformed, and the plastically deformed portion of the case 20 is male threaded 66 To bite into. At this time, since the end portion of the other side L2 of the case 20 is recessed, a part of the cover 60 protrudes from the case 20 to the other side L2, as shown in FIG. Is located inside the case 20.

  Further, the male screw 66 of the cover 60 and the female screw 226 of the case 20 may be plastically deformed by ultrasonic welding so as to prevent rotation between the cover 60 and the case 20.

(Operation)
As shown in FIG. 4, in the fluid damper device 10, during the closing operation in which the toilet seat 5 shown in FIG. 1 rotates from the standing posture to the flat posture, the rotor 30 (rotating shaft 40) moves in the first direction A around the axis L. Rotate. For this reason, the valve body 50 receives pressure from the fluid 12 and rotates, and the distal end portion 52 moves toward the second convex portion 462. As a result, the radially outer portion of the distal end portion 52 abuts on the inner peripheral surface 220 of the body portion 22 of the case 20. Therefore, in the valve body 50 and the valve body supporting convex portion 46, the movement of the fluid in the second direction B is blocked, so that a load (drag) is applied to the rotor 30 (rotating shaft 40). Even in such a case, a slight gap is left between the end portion 57 of the valve body 50 and the bottom wall 21 of the case 20 on the one side L1 from the valve body 50. Therefore, the movement of the fluid in the second direction B is slightly allowed on one side L1 of the valve body 50. Therefore, the rotor 30 (rotating shaft 40) is allowed to rotate in the first direction A at a low speed although a load is applied.

  In contrast, during the opening operation in which the toilet seat 5 illustrated in FIG. 1 rotates from the flat posture to the standing posture, the rotor 30 (the rotation shaft 40) rotates in the second direction B around the axis L. For this reason, the valve body 50 receives pressure from the fluid 12 and rotates, and the distal end portion 52 moves toward the first convex portion 461. As a result, there is a gap between the radially outer portion of the tip 52 and the inner peripheral surface of the body 22 of the case 20. Therefore, in the valve body 50 and the valve body supporting convex portion 46, the fluid is allowed to move in the first direction A, so that no load is applied to the rotor 30 (the rotating shaft 40).

(Main effects of this form)
As described above, in the fluid damper device 10 according to the present embodiment, as described with reference to FIG. 5 and the like, the radially inner end 231 of the partitioning convex portion 23 extends in the axis L direction. Since the 1 rib 15 is formed, when the fluid damper device 10 is assembled, the first rib 15 is appropriately crushed according to the interval between the outer peripheral surface 410 of the rotating shaft 40 and the partitioning convex portion 23. Therefore, the space between the outer peripheral surface 410 of the rotating shaft 40 and the partitioning convex portion 23 can be reliably packed. Therefore, when the rotating shaft 40 is rotated in the direction in which a load is generated, the fluid 12 can be easily prevented from leaking between the outer peripheral surface 410 of the rotating shaft 40 and the partitioning convex portion 230.

  Further, the first rib 15 has a circular arc surface 150 along the outer peripheral surface 410 of the rotating shaft 40 on the tip side in the protruding direction of the first rib 15. That is, when the fluid damper device 10 is assembled, the first rib 15 is pressed and crushed by the outer peripheral surface 410 of the rotating shaft 40 to have an appropriate height (projection dimension). Therefore, the space between the outer peripheral surface 410 of the rotating shaft 40 and the partitioning convex portion 23 can be reliably packed over the entire axis L direction. Therefore, when the rotating shaft 40 is rotated in the direction in which a load is generated, the fluid 12 can be easily prevented from leaking between the outer peripheral surface 410 of the rotating shaft 40 and the partitioning convex portion 230.

  Further, the fluid damper device 10 can generate a large load because the partitioning convex portion 23 and the valve body 50 are respectively provided at two locations in the circumferential direction. In this case, the number of locations where the fluid 12 leaks from between the outer peripheral surface 410 of the rotating shaft 40 and the radially inner end 231 of the partitioning convex portion 23 increases. Leakage can be easily suppressed. For this reason, the disadvantage of dividing the inside of the case 20 into a plurality in the circumferential direction can be eliminated.

  Further, since the partitioning convex portion 23 and the first rib 15 are connected to the bottom wall 21, the leakage of the fluid L between the partitioning convex portion 23 and the bottom wall 21 can be reliably suppressed.

Further, the second rib 16 (see FIG. 6) extending in the radial direction is formed on the end surface 417 on the one side L1 of the first shaft portion 41 and the end portion 467 on the one side L1 of the valve body supporting convex portion 46. When the fluid damper device 10 is configured, the second rib 16 corresponds to the gap between the end surface 417 of the first shaft portion 41 and the end portion 467 of the valve body supporting convex portion 46 and the bottom wall 21 of the case 20. It is crushed to the state. For this reason, since the space between the rotating shaft 40 and the bottom wall 21 can be filled with the second rib 16, the fluid 12 can be easily prevented from leaking between the rotating shaft 40 and the bottom wall 21. Further, a third rib 17 (FIGS. 5B and 5C) extending in the radial direction is formed at the end 236 on the other side L2 of the partitioning convex portion 23, and the third rib 17 is Fluid damper device 10
Is configured to be crushed to a state corresponding to the gap between the end portion 236 of the partitioning convex portion 23 and the first flange portion 43 of the rotating shaft 40. For this reason, since the space between the end 236 of the partitioning convex portion 23 and the first flange portion 43 of the rotating shaft 40 can be closed by the third rib 17, the end portion 236 of the partitioning protruding portion 23 and the rotating shaft 40 can be filled. It is possible to easily suppress the fluid 12 from leaking from the first flange portion 43.

(Other embodiments)
In the above embodiment, the fluid damper device 10 to which the toilet seat 5 is connected is illustrated. However, in a washing machine (equipment with a damper), a lid (opening / closing member) rotatably attached to the washing machine main body (equipment main body), etc. The present invention may be applied to the fluid damper device 10 connected to the fluid damper 10.

1 .... Western toilet (equipment with damper) 2 .... Toilet body (equipment main body) 5 .... Toilet seat (opening / closing member) 6 .... Toilet lid (opening / closing member) 10 .... Fluid damper device 10a ... Fluid damper device main body, 11 .... Damper chamber, 12 .... Fluid, 15 .... First rib, 16 .... Second rib, 17 .... 3rd rib, 20 .... Case, 21 ... Bottom wall, 22 ....・ Torso, 23. ・ Partition convex part, 30 ・ ・ Rotor, 41 ・ ・ First shaft part, 42 ・ ・ Second shaft part, 43 ・ ・ First flange part, 44 ・ ・ Second flange part, 45 .. Circumferential groove, 46 .... Valve support convex part, 50 .... Valve body, 51..Base part, 52..Tip, 60..Cover, 61..Cover hole, 62..Outer circumference of cover Surface, 63 .. end face of cover, 64 .. concave portion of cover, 66 .. male screw, 100 .. Western style toilet unit, 150. 20 ··· Inner peripheral surface, 226 ··· Internal thread, 227 ··· Step portion, 231 ··· Radial inner end portion, 236 · · End portion of partition convex portion, 410 · · Outer surface of first shaft portion, 417 ..End surface of first shaft part 467..End part of valve body supporting convex part, L..Axis, L1 ..One side, L2 ..Other side

Claims (7)

A rotation axis;
A valve body supported on the outer peripheral side of the rotating shaft;
A cylindrical body part surrounding the rotation axis, and a case having a partition convex part protruding radially inward from the body part;
A fluid filled in the case;
Have
The case includes a bottom wall facing an end surface on one side in the axial direction of the rotating shaft,
On the end surface of the rotating shaft, a second rib protruding toward the bottom wall and in contact with the bottom wall extends in a radial direction,
The fluid damper device according to claim 1, wherein a first rib projecting toward an outer peripheral surface of the rotating shaft and in contact with the outer peripheral surface extends in an axial direction at a radially inner end of the partitioning convex portion.   2. The fluid damper device according to claim 1, wherein the first rib has a circular arc surface along an outer peripheral surface of the rotating shaft at a front end side in a protruding direction of the first rib.   3. The fluid damper device according to claim 1, wherein each of the partitioning convex portion and the valve body is provided at a plurality of locations in a circumferential direction. Before SL projections and the first rib partition, the fluid damper device according to any one of claims 1 to 3, characterized in that in communication with the bottom wall. The rotary shaft is provided with a flange portion facing an end portion of the axial direction of the other side of the partition protrusion,
Wherein the said end of the partition projection, any one of claims 1 to 4, characterized in that third ribs in contact with the flange portion projecting toward the flange portion extends radially The fluid damper device according to item. A damper-equipped device comprising the fluid damper device according to any one of claims 1 to 5 ,
A damper-equipped device, wherein an opening / closing member that is rotationally moved with respect to the device main body is attached to the rotating shaft. The apparatus with a damper according to claim 6 , wherein the opening / closing member is a toilet seat of a Western-style toilet.

Images