WO2016129539A1

WO2016129539A1 - Fluid damper device and apparatus equipped with damper

Info

Publication number: WO2016129539A1
Application number: PCT/JP2016/053605
Authority: WO
Inventors: 直哉三原; 章宏伊藤; 浩之岩下
Original assignee: 日本電産サンキョー株式会社
Priority date: 2015-02-13
Filing date: 2016-02-08
Publication date: 2016-08-18
Also published as: JP2016148439A

Abstract

[Problem] To provide a fluid damper device wherein reductions in damper performance that arise from wear on components can be suppressed, and to provide an apparatus that is equipped with a damper. [Solution] A fluid damper device 10 wherein a rotating shaft 40 that supports valve bodies 50 is inserted into a bottomed case 20 that is provided with a bottom wall that is to one side L1 in a shaft-line L direction, wherein the inside of the case 20 is filled with a fluid such as oil, and wherein a cover 60 is affixed to the case 20 at an end part thereof that is to the other side L2 in the shaft-line L direction. Partitioning protrusions 23 protrude from a trunk part 22 of the case 20 toward the radial-direction inside, and flange parts 43 protrude from the rotating shaft 40 toward the radial-direction outside at positions that are adjacent to the partitioning protrusions 23 in the shaft-line L direction. An elastically deformable elastic member 80 is arranged around the rotating shaft 40 between the cover 60 and the flange parts 43 in the shaft-line L direction. As a result, the rotating shaft 40 is pressed by the elastic member 80 to the one side L1 in the shaft-line L direction.

Description

Fluid damper device and damper equipped device

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

In the fluid damper device, as shown in FIG. 10, a rotating shaft 40 that holds the valve body 50 is inserted into the case 20 on the outer peripheral side, and the case 20 is filled with a fluid 12 such as oil. . The case 20 has a bottom wall 21 on one side L1 in the direction of the axis L, and a partitioning convex portion (not shown) protruding radially inward. A cover 60 through which the rotary shaft 40 passes is fixed to the end portion of the other side L2 in the axis L direction of the case 20 by a method such as welding, and a portion of the rotary shaft 40 protruding from the cover 60 has a toilet seat. Opening and closing members such as are connected. The rotating shaft 40 is provided with a flange portion 43 protruding radially outward at a position adjacent to the partition convex portion on the other side L2 in the axis L direction. A space between the flange portion 43 is a damper chamber 11 filled with a fluid 12 (see Patent Document 1).

Further, an annular sealing member 70 is provided around the rotating shaft 40 to prevent the fluid 12 from leaking. For example, the circumferential groove 430 is formed on the outer peripheral surface of the flange portion 43, and the sealing member 70 is attached to the circumferential groove 430.

JP 2012-202504 A

In the fluid damper device shown in FIG. 10, when the rotation shaft 40 rotates to one side around the axis along with the rotation of the opening / closing member, a force to compress the fluid 12 is applied to the rotation shaft 40. A load can be applied to the rotating shaft 40.

At this time, when the pressure in the damper chamber 11 rises and the flange portion 43 is pressed toward the cover 60, the flange portion 43 slides while being pressed against the cover 60. There is a possibility that the 60 may be worn. Further, the bottom wall 21 and the rotary shaft 40 are also slidable portions, and there is a possibility that the bottom wall 21 or the rotary shaft 40 is worn.
When such wear occurs, play in the direction of the axis L occurs on the rotating shaft 40, and a large gap is generated between the flange portion 43 and the partitioning convex portion, or between the rotating shaft 40 and the bottom wall 21, and the damper. Performance decreases.

In view of the above problems, an object of the present invention is to provide a fluid damper device capable of suppressing a decrease in damper performance due to wear of members, 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 has a cylindrical body, a bottom wall provided on one side in the axial direction of the body, and a radially inward protrusion from the body. A case provided with a convex part for partitioning, and a rotating shaft provided with a flange part inserted into the case and projecting radially outward at a position adjacent to the convex part for partitioning on the other side in the axial direction; A valve body supported on the outer peripheral side of the rotating shaft on one side in the axial direction from the flange portion, a filled fluid filled between the bottom wall and the flange portion in the case, and the rotation A cover provided with a hole through which the shaft passes and fixed to the other end of the case in the axial direction; an elastic member disposed between the cover and the flange portion and elastically deformable in the axial direction It is characterized by having.

In this invention, the elastic member is arrange | positioned between the cover and the flange part of the rotating shaft, and the elastic member is pressing the rotating shaft to the one side of the axial direction via the flange part of the rotating shaft. Therefore, when the rotating shaft rotates, one end portion in the axial direction of the rotating shaft slides with respect to the bottom wall of the case. Moreover, the flange part of a rotating shaft slides with respect to the end surface of the other side of the axial direction of the convex part for a partition. For this reason, there is a possibility that wear may occur between the end portion on one side of the rotating shaft in the axial direction and the bottom wall of the case, or between the flange of the rotating shaft and the end surface on the other side in the axial direction of the partitioning convex portion. There is.
However, in the present invention, since the elastic member is disposed between the cover and the flange portion of the rotating shaft, the rotating shaft is pressed to one side in the axial direction by the elastic member. For this reason, even if the above-mentioned wear occurs, it is difficult to generate an extra gap that separates in the axial direction between the rotating shaft and the bottom wall of the case or between the flange portion and the partitioning convex portion. Accordingly, it is possible to suppress a decrease in damper performance. Moreover, when a large external force is applied to the rotating shaft and the rotating shaft rotates, the pressure in the case tends to increase rapidly, but the rapid increase in pressure can be absorbed by the elastic member. Accordingly, it is possible to suppress the occurrence of problems such as deformation of the case, the cover, the rotating shaft, and the like.

In the present invention, it is preferable that the cover is fixed to the case by a male screw formed on the outer peripheral surface of the cover and a female screw formed on the inner peripheral surface of the case. If an elastic member is provided between the flange part and the cover, the cover is displaced in the axial direction, so there is a problem that it takes much time to weld the cover to the case. Even when an elastic member is provided between the cover and the cover, the cover can be easily fixed to the case. Moreover, since the fixing strength of the cover with respect to the case is high with the screwing method, the cover is difficult to be removed from the case even when the pressure in the case suddenly increases.

In the present invention, the elastic member is, for example, a rubber spacer.

In the present invention, the elastic member may be a spring member.

In the device with a damper provided with 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.

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 an exploded perspective view of a fluid damper device to which the present invention is applied. 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 explanatory drawing of the example of improvement of the fixing structure of the cover in the fluid damper apparatus to which this invention is applied. It is explanatory drawing of the rotation stop process at the time of employ | adopting the fixing structure shown in FIG. It is explanatory drawing of the modification of the elastic member used for the fluid damper apparatus to which this invention is applied. It is explanatory drawing of the fluid damper apparatus which concerns on the reference example of this invention.

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 on which 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.

1 includes a western-style 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)
3 is a cross-sectional view of the fluid damper device 10 to which the present invention is applied. FIGS. 3A and 3B are cross-sectional views of the fluid damper device 10 along the axis L at a position passing through the valve body 50. FIG. FIG. 6 is 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. FIG. 4 is a longitudinal sectional view of the fluid damper device 10 to which the present invention is applied, and is a sectional view of the fluid damper device 10 cut along a plane perpendicular to the axis L at a position passing through the valve body 50. FIG. 5 is an exploded perspective view of 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. 5 (a), 5 (b), and 5 (c) are respectively a case 20 to a cover 60. FIG. 4 is an exploded perspective view in a state in which the rotor 30 is removed, an exploded perspective view in a state in which the rotor 30 is further removed from the case 20, and an exploded perspective view in a state in which the elastic member 80 is removed from the rotor 30. 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 at the end of one side L 1, and one side L 1 disposed inside the case 20. The rotor 30 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 portion 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 1 and rotatably support the end portion 49 on the one side L 1 of the rotating shaft 40 of the rotor 30.

Two partitioning projections 23 protrude radially inward from the inner peripheral surface 220 of the barrel 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 supported on the outer peripheral 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, an annular flange portion 43 that protrudes radially outward at a position adjacent to the first shaft portion 41 on the other side L 2 between the first shaft portion 41 and the second shaft portion 42. The flange portion 43 is adjacent to the partition convex portion 23 of the case 20 on the other side L2. The flange portion 43 is formed with a circumferential groove 45 extending along the outer peripheral surface of the flange portion 43. Therefore, if the sealing member 70 such as a rubber O-ring is attached to the circumferential groove 45 and the first shaft portion 41 of the rotating shaft 40 is inserted inside the case 20, the sealing member 70 becomes the body portion of the case 20. 22 of the inner peripheral surface 220 of 22 is contacted in a compressed state with a portion 229 located on one side L1, and the space between the case 20 and the rotating shaft 40 is sealed. In addition, a space defined by the bottom wall 21 and the flange portion 43 of the rotating shaft 40 is sealed inside the case 20 as the damper chamber 11. At that time, the damper chamber 11 is filled with a fluid 12 (viscous fluid) such as oil.

After that, the fluid damper device 10 is configured by inserting the cover 60 between the second shaft portion 42 of the rotating shaft 40 and the body portion 22 of the case 20 and fixing the cover 60. Here, the cover 60 includes a cylindrical portion 67 in which a hole 61 through which the rotation shaft 40 passes is formed, and an annular portion 68 that protrudes radially outward at an end portion on the other side L2 of the cylindrical portion 67 in the axis L direction. Have. Accordingly, the end portion 49 on one side L1 of the rotation 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 rotatable inside the hole 61 of the cover 60. Supported. Moreover, a part of 2nd axial part 42 penetrates the hole 61 of the cover 60, and the connection part 10b is comprised.

In this embodiment, ultrasonic welding is used to fix the cover 60 to the case 20. In such ultrasonic welding, a horn is brought into contact with the rear end surface (ring portion 68) in the insertion direction of the cover 60 to generate ultrasonic waves, and the outer peripheral surface portion of the cover 60 and the inner peripheral surface portion of the case are connected. The cover 60 is pushed into the case 20 while being melted.

(Configuration of elastic member 80)
In the fluid damper device 10 of this embodiment, an elastic member 80 that is elastically deformable in the direction of the axis L is disposed between the cover 60 and the flange portion 43 of the rotating shaft 40. In this embodiment, the elastic member 80 is a rubber spacer 80 a having an inner diameter larger than the outer diameter of the rotating shaft 40. The elastic member 80 (spacer 80a) has an end surface 81 on one side L1 in contact with the flange portion 43 in the axis L direction, and an end surface 82 on the other side L2 in contact with the cylindrical portion 67 of the cover 60 in the axis L direction. 43 and the cover 60 are in a compressed state. For this reason, the rotating shaft 40 is pressed to one side L1 in the direction of the axis L by the elastic member 80 via the flange portion 43.

In this embodiment, the elastic member 80 has the outer peripheral surface 83 in contact with the inner peripheral surface 220 of the case 20. An annular step portion 227 facing the other side L2 in the axis L direction is formed on the inner peripheral surface of the case 20.

(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, on the outer peripheral surface 410 of the first shaft portion 41 of the rotating shaft 40, there are valves protruding outward in the radial direction at two positions shifted by 180 ° in the circumferential direction. A body support convex portion 46 is formed, and a valve body 50 is supported on each of the two valve body support convex portions 46. Each of the two valve body supporting convex portions 46 extends in the direction of the axis L from the end portion on one side L1 of the rotating shaft 40 to the flange portion 43, and both of the two valve body supporting convex portions 46 are provided. The end portion of the other side L2 is connected to the 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, the edge part of the other side L2 is connected with the flange part 43 in all.

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.

(Sealing structure in the direction of the axis L in the damper chamber 11)
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 2 of the valve body 50 is in contact with the flange portion 43. Therefore, there is almost no gap between the valve body 50 and the flange portion 43. For this reason, the fluid 12 does not pass between the valve body 50 and the 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 valve body supporting convex portion 46. 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.

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. 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 first rib 16 (see FIG. 6) extending in the radial direction is formed on the end surface 417 on one side L1 and the end 467 on one side L1 of the valve body supporting convex portion 46. When the fluid damper device 10 is configured, the first rib 16 has a clearance between the end surface 417 of the first shaft portion 41 and the bottom wall 21 of the case 20 and the end portion 467 of the valve body supporting convex portion 46 and the case 20. It is crushed to a state corresponding to the gap with the bottom wall 21. 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.

Further, a slight gap may exist between the end surface 236 on the other side L2 of the partitioning convex portion 23 and the flange portion 43 of the rotating shaft 40, but the end surface 236 on the other side L2 of the partitioning convex portion 23. Are formed with second ribs 17 (see FIG. 5B) extending in the radial direction. When the fluid damper device 10 is configured, the second rib 17 is crushed to a state corresponding to the gap between the end surface 236 of the partitioning convex portion 23 and the flange portion 43 of the rotating shaft 40. For this reason, the fluid 12 does not pass between the end surface 236 of the partitioning convex portion 23 and the flange portion 43 of the rotating shaft 40.

(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 prevented, so that a load (drag) is applied to the rotor 30 (the 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 shown in FIG. 1 rotates from the flat posture to the standing posture, the rotor 30 (rotating 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 support 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 of this embodiment, the elastic member 80 is disposed between the cover 60 and the flange portion 43 of the rotating shaft 40, and the elastic member 80 is the flange portion of the rotating shaft 40. The rotating shaft 40 is pressed to one side L1 in the direction of the axis L via 43. Therefore, when the rotating shaft 40 rotates, the end surface 417 of the first shaft portion 41 and the end portion 467 of the valve body supporting convex portion 46 slide with respect to the bottom wall 21 of the case 20. Further, the flange portion 43 of the rotating shaft 40 slides with respect to the end surface 236 on the other side L2 of the partitioning convex portion 23. Further, when the pressure in the damper chamber 11 (inside the case 20) increases, sliding also occurs between the flange portion 43 and the elastic member 80 or between the elastic member 80 and the cover 60. For this reason, wear may occur between the flange portion 43 and the elastic member 80 or between the elastic member 80 and the cover 60. Further, between the end surface 417 of the first shaft portion 41 and the bottom wall 21 of the case 20, between the end portion 467 of the valve body supporting convex portion 46 and the bottom wall 21 of the case 20, and between the flange portion 43 and the partition wall. Wear may occur between the end surface 236 on the other side L2 of the convex portion 23. However, in this embodiment, since the elastic member 80 is disposed between the cover 60 and the flange portion 43 of the rotating shaft 40, the rotating shaft 40 is pressed by the elastic member 80 to the one side L1 in the axis L direction. .
For this reason, even if the above-mentioned wear occurs, it is between the rotating shaft 40 and the bottom wall 21 of the case 20 (between the end surface 417 of the first shaft portion 41 and the bottom wall 21 of the case 20, and for supporting the valve element). Between the flange portion 43 and the end face 236 on the other side L2 of the partitioning convex portion 23, and an extra space in the direction of the axis L. It is difficult for gaps to occur. Accordingly, it is possible to suppress a decrease in damper performance.

In addition, when a large external force is applied to the rotating shaft 40 and the rotating shaft 40 rotates, the pressure in the damper chamber 11 (inside the case 20) tends to increase rapidly. Can be absorbed by. Therefore, it is possible to suppress the occurrence of problems such as deformation of the case 20, the cover 60, or the rotating shaft 40.

(Improvement example of fixing structure of cover 60 to case 20)
FIG. 7 is an explanatory diagram of an improved example of the fixing structure of the cover 60 in the fluid damper device 10 to which the present invention is applied. FIG. 8 is an explanatory diagram of the rotation stopping process when the fixing structure shown in FIG. 7 is adopted, and FIGS. 8A and 8B are side views when the bonding process is performed as the rotation stopping process, and FIG. It is a side view at the time of performing a caulking process as a rotation stopping process.

In the embodiment described with reference to FIGS. 1 to 6, ultrasonic welding is used. In this embodiment, as shown in FIG. A male screw 66 formed on the outer peripheral surface 62 of the inner peripheral surface of the case 20 and a female screw 226 formed on a portion 228 of the inner peripheral surface 220 of the case 20 adjacent to the opening 29 are used.

In this embodiment, the cover 60 has an annular shape, and the portion having the maximum 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.

On the end surface 63 of the other side L2 of the cover 60, concave portions 64 are formed 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. The cover 60 is rotated by engaging.

The case 20 and the cover 60 configured as described above 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.

In the present embodiment, an anti-rotation process is performed between the cover 60 and the case 20.
As such a rotation prevention process, for example, a bonding process, a caulking process using heat caulking, ultrasonic caulking, or the like is used. 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 using an adhesive treatment as the anti-rotation treatment, 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. 8A, 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 2. The structure does not protrude.

On the other hand, when the caulking process is performed as the anti-rotation process, for example, the case 20 is plastically deformed by bringing a heating head or the like into contact with the end of the other side L2 of the case 20 and the case 20 is plastically deformed. Is bitten into the male screw 66. 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.

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

According to such a configuration, the fixing strength of the cover 60 with respect to the case 20 is high. In particular, on the outer peripheral surface 62 of the cover 60, since the male screw 66 is formed over the entire direction of the axis L, the entire cover 60 can be screwed to the case 20. Therefore, the cover 60 can be firmly fixed to the case 20. Therefore, even when the pressure in the case 20 (damper chamber 11) increases excessively, it is difficult for the cover 60 to be pushed out. Even when the elastic member 80 is provided between the flange portion 43 and the cover 60, if the cover 60 is screwed into the case 20, the cover 20 is attached to the case 20 rather than the method in which the cover 60 is fixed to the case 20 by ultrasonic welding. The cover 60 can be fixed easily and reliably. Further, since the case 20 and the cover 60 are resin molded products, the female screw 226 and the male screw 66 can be formed simultaneously when the case 20 and the cover 60 are molded. Therefore, the cost of the fluid damper device 10 can be reduced. Moreover, since the recessed part 64 is formed in the circumferential direction in the end surface 63 of the other side L2 of the cover 60, when fixing the cover 60 to the case 20, a jig is engaged with the recessed part 64, The cover 60 can be rotated.

Further, since the portion where the outer diameter of the cover 60 is maximum is a portion where the male screw 66 is formed, the entire cover 60 or substantially the entire cover 60 can be positioned in the case 20. Therefore, the dimension of the fluid damper device 10 in the axis L direction can be reduced.

(Modification of elastic member 80)
FIG. 9 is an explanatory view of a modified example of the elastic member 80 used in the fluid damper device 10 to which the present invention is applied. FIGS. 9A, 9B, and 9C show the wave used as the elastic member 80. FIG. 4 is a plan view of a washer 80b, a cross-sectional view of a wave washer 80b, and a perspective view of a coil spring 80c used as an elastic member 80. FIG.

In the embodiment described with reference to FIGS. 1 to 6, the rubber spacer 80 a is used as the elastic member 80, but a spring member may be used as the elastic member 80. For example, a wave washer 80b (spring member) shown in FIGS. 9A and 9B may be used. The wave washer 80b is curved on one side of the thickness and curved on the other side of the thickness. The portions 89 are alternately provided. Further, as the elastic member 80, a coil spring 80b (spring member) shown in FIG. 9C may be used.

(Other embodiments)
In the above embodiment, when the elastic member 80 is disposed between the cover 60 and the flange portion 43 of the rotary shaft 40, the elastic member 80 is in direct contact with the cover 60 and the flange portion 43 of the rotary shaft 40. You may employ | adopt the structure by which a washer etc. are arrange | positioned between the elastic member 80 and the cover 60, or between the elastic member 80 and the flange part 43 of the rotating shaft 40.

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 style toilets 2 · · Toilet body (equipment main unit) 5 · · Toilet seat (opening and closing member) 6 · · Toilet lid (opening and closing member) 10 · · Fluid damper device, 11 · · Damper chamber, 12 · · · Fluid, 20 · · Case, 21 · · Bottom wall, 22 · · Body, 30 · · Rotor, 40 · · Rotating shaft, · · · Valve body support convex portion, 50 · · Valve body, 60 · · · Cover, 66 ... male screw, 70 ... sealing member, 80 ... elastic member, 80a ... spacer, 80b ... wave washer, 80c ... coil spring, 100 ... Western style toilet unit, 226 ... female screw, L ...・ Axis, L1 ・・ One side in the axial direction, L2 ・・ The other side in the axial direction

Claims

A case having a cylindrical body, a bottom wall provided on one side in the axial direction of the body, and a partitioning convex portion protruding radially inward from the body;
A rotating shaft provided with a flange portion inserted into the case and projecting radially outward at a position adjacent to the partition convex portion on the other side in the axial direction;
A valve body supported on the outer peripheral side of the rotary shaft on one side in the axial direction from the flange portion, and a filled fluid filled between the bottom wall and the flange portion in the case;
A cover provided with a hole through which the rotating shaft passes, and fixed to the other end of the case in the axial direction;
An elastic member disposed between the cover and the flange portion and elastically deformable in the axial direction;
A fluid damper device characterized by comprising:
The fluid damper device according to claim 1, wherein the cover is fixed to the case by a male screw formed on an outer peripheral surface of the cover and a female screw formed on an inner peripheral surface of the case.
The fluid damper device according to claim 1 or 2, wherein the elastic member is a rubber spacer.
The fluid damper device according to claim 1 or 2, wherein the elastic member is a spring member.
A damper-equipped device comprising the fluid damper device according to any one of claims 1 to 4,
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 damper-equipped device according to claim 5, wherein the opening / closing member is a toilet seat of a Western-style toilet.