JP4102200B2 - Method for manufacturing damper device using viscous fluid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a damper device using a viscous fluid, and more particularly to a manufacturing method of a damper applied to a rotary damper apparatus applied to a rotating lid and rotating the door to open and close by a hinge.
[0002]
[Prior art]
FIG. 9 schematically shows only a main part of a damper device 100 using a viscous fluid manufactured by a conventional manufacturing method . FIG. 9A is a transverse cross-sectional view perpendicular to the rotation axis C. FIG. b) is a longitudinal sectional view along the rotation axis C; A case 105 is fixed to a toilet seat (not shown), and a rotor member 101 is attached to a hinge of the toilet seat / toilet lid. When the toilet seat / toilet lid is moved from the fully open state to the closing direction (clockwise rotation CW in FIG. 9A), the rotor member 101 rotates together with the toilet seat / toilet lid hinge and is attached to the rotor member 101. The check valve 102 is in close contact with the rotor blade 103 provided on the rotor member 101 by the resistance of viscous fluid (oil) (shown in the left half of FIG. 9A). For this reason, since the orifice 104 formed in the rotary blade 103 is blocked by the check valve 102, the flow of the viscous fluid (oil) is deteriorated, and the toilet seat / toilet lid is subjected to the resistance of the viscous fluid (oil) to gravity. Then close slowly and there is no danger of falling suddenly.
[0003]
Next, when the toilet seat / toilet lid is moved from the closed state to the opening direction (counterclockwise CCW in FIG. 9A), when the rotor member 101 is rotated, the check valve 102 is caused by the resistance of the viscous fluid (oil). The contact state with the rotor blade 103 is released (shown in the right half of FIG. 9A). Since the orifice 104 is expanded and the viscous fluid (oil) can move without resistance, the toilet seat / toilet lid can be opened with a light force, so that infants, the elderly, and the handicapped can handle them without problems. Yes.
[0004]
[Problems to be solved by the invention]
However, as is apparent from FIG. 9B, the damper device 100 using this type of viscous fluid has a rotor member 101 in which a check valve 102 is mounted in a case 105 formed of a cylindrical member. In order to prevent the viscous fluid (oil) from leaking after the viscous fluid (oil) is filled, the case 105 is sealed by screwing or ultrasonic welding using the cover 106. For this reason, there are many seal locations by the O-rings 107 and 108 (three locations in the illustrated example), and not only is viscous fluid (oil) leaking due to component or assembly failure, but the number of seal locations increases. The score also increases.
[0005]
Further, even if the case 105 and the cover 106 are fixed by screwing or ultrasonic welding, a force is applied in a direction in which the case 105 and the cover 106 are separated by the viscous fluid (oil) pressure in the case 105. The possibility of leaking viscous fluid (oil) is not resolved. Therefore, a problem is likely to occur in the fixing method of the case 105 and the cover 106, which includes a factor of viscous fluid (oil) leakage.
[0006]
Japanese Patent Application Laid-Open No. 10-318319 has a structure in which the number of parts to be sealed is reduced by the bottomed case 2 and the number of parts is small. The damper device using viscous fluid used for the toilet seat / toilet lid has a check valve and a direction in which the damper action functions and a slipping direction. Two types of dampers with different directions must be prepared for the other product.
[0007]
In JP-A-7-301272 (Patent No. 3053156), the casing 1 and the closing lid 5 are fixed with bolts 62, then the viscous fluid is filled from the inlet 12 and the inlet 12 is sealed with the bolt 61. Although a damper is disclosed, when injecting a viscous fluid from the injection port 12, it takes time to vent the air. Particularly, a high-viscosity viscous fluid for the purpose of improving the damper characteristics has a high viscosity and is injected from the hole. Make it difficult. Furthermore, in a damper used in a door closer, after injecting a viscous fluid (oil) from a viscous fluid (oil) injection hole, a steel ball is embedded in the sealing of the viscous fluid (oil) injection hole or air vent hole. Although this means is possible for metal parts, it is not suitable for resin-molded parts such as those used for toilet seats / toilet lids.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a damper using a viscous fluid that can improve the reliability for preventing the leakage of viscous fluid, while reducing the number of installation locations of the sealing member that prevents the filled viscous fluid from leaking. It is to provide a method for manufacturing a device.
[0009]
Further, purpose of the present invention, the viscous fluid can be reasonably easily injected, with the loss is reduced due to overflowing of the viscous fluid, the method of manufacturing the damper device using a viscous fluid which can perform assembly work easier Is to provide .
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a damper device manufacturing method using a viscous fluid manufactured according to the present invention includes a cylindrical member having a cylindrical inner surface, and the inner surface of the cylindrical member facing the inner surface in a radial direction. Formed in cooperation with the outer circumferential surface of the shaft body and the inner surface of the cylindrical member, and formed in the cylindrical member, toward the space. a partition projecting provided on the shaft body, the viscous fluid-Ri damper device der using a viscous fluid and a chaos that wing and check valve, the shaft, the axis of the shaft member A flange portion having a diameter larger than the diameter of the first portion and having a first viscous fluid pressure receiving surface for the viscous fluid, and the cylindrical member includes a second viscous fluid pressure receiving surface for the viscous fluid and the shaft. A small-diameter opening having a diameter equivalent to the diameter of the portion, and the flange portion A large-diameter opening having a diameter equivalent to the diameter, and a first seal member between the shaft and the small-diameter opening, and a second seal between the flange and the large-diameter opening. member is provided, wherein the first, the viscous fluid by the second sealing member is a method of manufacturing the damper device that has been sealed, by inserting the guide member fitted to the small diameter opening, the guide member A method for manufacturing a damper device using a viscous fluid, wherein a predetermined amount of the viscous fluid is injected into a temporary space in cooperation with an inner surface of the cylindrical member, and then the guide member and the shaft body are replaced. Is to provide .
The first, the second sealing member may be configured to so that is sealed by the use of O-ring.
[0011]
Also, the good applicable, the guide member is a shaft portion and the diameter of the shaft body, with is insertable into the small opening, the end portion of the guide member engageable with the shaft portion An engaging portion is provided, and the shaft portion engages with an engaging portion formed at an end portion of the guide member to replace the guide member and the shaft body.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a damper device using a viscous fluid manufactured according to the present invention will be described below with reference to the drawings. Here, oil or grease is usually used as the viscous fluid, and in the present embodiment described later, description will be made with a damper device using oil (hereinafter referred to as “oil damper device”). A viscous fluid having a high viscosity is used. Note that grease may be used instead of oil, and the present invention is not limited to a viscous fluid (oil / grease) having a high viscosity.
Figure 1 is a sectional view showing a first embodiment of an oil damper device which is more prepared to present invention, (a) is a cross-sectional view taken along the rotational axis of the oil damper device, (b) the cross section perpendicular to the rotation axis FIG. 1 shows a schematic configuration of a check valve 30 described later.
Reference numeral 10 denotes an oil damper device manufactured according to the first embodiment, and a case 14 as a cylindrical member is provided with a partition wall 16 projecting radially from an inner surface 14a in two axially symmetrical directions. The tip of the partition wall 16 is formed in an arc shape, and is opposed to the outer peripheral surface of the rotary shaft 20 constituting the rotor 18 as a shaft body with a predetermined gap.
[0013]
In addition, the rotary shaft 20 in the first embodiment has a coupling hole 20a having an oval cross section that is coupled to a hinge shaft (not shown) penetrating in the center.
The rotor 18 is provided with a blade (hereinafter referred to as a “rotary blade”) 22 and a check valve 30 that are axially symmetrical from the rotary shaft 20 toward the inner surface 14 a of the case 14.
The tip of the rotary blade 22 is formed in an arc shape along the inner surface 14a of the case 14, and in the axial direction of the rotary shaft 20, the (rotary blade 22) has a first viscous fluid pressure receiving surface 24a and a second pressure receiving surface 24a. Are provided so as to be sandwiched between the viscous fluid pressure receiving surfaces 24b. The first viscous fluid pressure receiving surface 24 a is an inner surface of a large-diameter flange portion 25 formed integrally with the rotary shaft 20, and an O-ring 25 a as a seal member is attached to the outer periphery of the flange portion 25. The flange portion 25 is fitted into a large-diameter opening portion 14 b formed in the case 14.
The second viscous fluid pressure receiving surface 24 b is configured by a surface 27 formed when a small-diameter opening (hereinafter referred to as “through hole”) 26 is formed in the case 14.
Further, as shown in FIG. 1, a cylindrical boss 27a is formed in the through hole 26, and the shaft portion 20b of the rotary shaft 20 with the O-ring 20c is supported on the inner surface of the boss 27a. Has been. Thereby, the rotating shaft 20 is stably supported.
[0014]
Further, as shown in FIG. 4, both axial end surfaces 22a and 22a of each rotor blade 22 are opposed to the first and second viscous fluid pressure receiving surfaces 24a and 24b via a gap.
Each rotor blade 22 is formed with convex portions 22b and 22b on both sides in the axial direction, and a notch 29 having a predetermined length and depth is formed as an orifice between these 22b and 22b in the rotational direction.
The oil 31 filled as the viscous fluid includes the inner surface of the flange portion 25 (first viscous fluid pressure receiving surface 24a), the surface 27 formed on the case 14 (second viscous fluid pressure receiving surface 24b), and the inner surface of the case 14. The space surrounded by 14a and the rotating shaft 20 is filled and sealed.
Two spaces formed between the opposing partition walls 16 in the case 14 are divided into an oil chamber (A) 33a and an oil chamber (B) 33b by the rotary blades 22 (see FIG. 2).
[0015]
Further, a check valve 30 is attached to the rotor blade 22, and the check valve 30 is fitted with the rotor blade 22 while maintaining a clearance p in the rotation direction, and is free to play along the inner surface 14 a of the case 14. It is supported so as to be movable between the gaps p (see FIG. 2B).
In the present embodiment, the check valve 30 is attached to the rotor blade 22 with a simple retaining mechanism such as a snap fit, so that it can be prevented from falling off the rotor blade 22 and the assembly workability can be improved.
The check valve 30 includes a valve portion 30 a that covers the entire notch 29 (orifice) of the rotor blade 22 and a sliding contact portion 30 b that is in sliding contact with the inner surface 14 a of the case 14.
[0016]
Next, the operation of the oil damper device which is more produced in the present invention. 2A shows the operation of the check valve 30 in the direction in which the oil damper action functions (CW direction in the figure), and FIG. 2B shows the check valve in the direction in which the damper idles (CCW direction in the figure). 30 operations are shown. Both are cross-sectional views perpendicular to the axis. In FIG. 2A, when the case 14 is fixed and the rotary shaft 20 is rotated clockwise CW, the oil in the oil chamber (A) 33a is pressurized and tends to move to the oil chamber (B) 33b.
However, since the valve portion 30a of the check valve 30 is in close contact with the rotor blade 22 to seal the notch 29 of the rotor blade 22, the rotary shaft 20, the rotor blade 22, the check valve 30 and the like and the inner surface 14a of the case 14 are used. The oil 31 moves from a slight gap with At this time, the resistance of the oil increases, it becomes a brake, and the toilet seat / toilet lid closes slowly.
The oil 31 can move from the clearance between the partition walls 16, 16 and the rotary shaft 20, but the interval is small and resistance to movement of the oil 31 is applied.
[0017]
In FIG. 2B, when the case 14 is fixed and the rotating shaft 20 is rotated counterclockwise CCW, the oil in the oil chamber (B) 33b is pressurized and tends to move to the oil chamber (A) 33a. .
Due to the oil resistance at this time, the check valve 30 moves by the play p, the valve portion 30a is separated from the notch 29, and the notch 29 is opened. As a result, the clearance p formed between the rotor blade 22 and the check valve 30 and the notch 29 become the oil passage 33c, and in the case of the counterclockwise CCW rotation of the rotary shaft 20, the oil chamber (B ) Oil 31 can easily move from 33b to oil chamber (A) 33a. For this reason, the oil resistance is small (or does not occur), the rotating shaft 20 is idled, and the toilet seat / toilet lid can be opened with a light force.
[0018]
Next, a method for manufacturing the oil damper device 10 which is more produced in the present invention.
FIG. 3 is a schematic cross-sectional view shown in the order of steps in FIGS.
In FIG. 3A, a guide rod 40 as a guide member having the same diameter as the through hole 26 is inserted from the through hole 26 of the boss 27a of the case 14 as a jig so that the case 14 is in a temporarily bottomed state. A predetermined amount of oil 31 is injected into the inner space 39 from the large-diameter opening 14b.
[0019]
In FIG. 3B, the rotary shaft 20 has an O-ring 20 c attached to the outer periphery of the shaft portion 20 b and an O-ring 25 a attached to the outer periphery of the flange portion 25. A check valve 30 is attached to the rotary blade 22. The rotating shaft 20 has an outer peripheral surface formed as a continuous surface by engaging the outer end surface of the shaft portion 20b with the tip of the guide rod 40 (see FIG. 4). Specifically, the front end (end portion) of the guide rod 40 is formed with a convex engagement portion 40a having the same cross section as the connection hole 20a, and can be connected concentrically with the connection hole 20a of the rotary shaft 20. .
[0020]
In FIG. 3C, the rotor 18 connected to the guide rod 40 is pushed into the case 14 filled with oil 31 while sliding, and both ends of the rotor 18 are first and second viscous fluid pressure receiving surfaces 24a in the axial direction. , 24 b, the oil 31 is sealed between the inner surface 14 a of the case 14 and the rotor 18.
In FIG. 3D, the guide rod 40 is pulled out from the rotor 18 and the cover 37 is fixed to the case 14 to prevent the rotor 18 from coming out of the case 14 and complete the assembly of the damper device.
The cover 37 locks the rotor 18 in the case 14 and does not prevent (oil) viscous fluid from leaking out. The guide bar 40 is reused as the next assembly jig.
[0021]
The manufacturing method for injecting oil using such a jig is applicable to the case 14 having a structure having a small-diameter through hole 26 at one end and a large-diameter opening 14b at the other end. examples of alternative structure for an oil damper device which is more prepared to the present invention will be outlined on the basis of FIGS. 5-9. The same members as those in the above embodiment are denoted by the same reference numerals, and the operation of each embodiment is the same as that in the first embodiment, so that the description thereof is omitted.
[0022]
The oil damper device 50 manufactured according to the second embodiment shown in FIG. 5 is similar to the oil damper device 10 of the first embodiment, with the central shaft 18a of the rotor 18-2 projecting from the left and right sides of the case 14, respectively. An O-ring 20 c is attached to the shaft portion 20 b of the rotary shaft 20, and an O-ring 25 a is attached to the large-diameter flange portion 25. In this case, the engaging portion 41 a of the central shaft 18 a is recessed at the tip of the guide rod 40, so that the outer peripheral surface of the trunk portion can form the same continuous surface as the outer peripheral surface of the rotating shaft 20. It has become.
[0023]
The oil damper device 60 manufactured according to the third embodiment shown in FIG. 6 does not use the cover 37 and is screwed like a bolt through the bearing plate 32 from the direction opposite to the insertion direction of the rotor 18-3. The member 34 is screwed into the rotary shaft 20 to prevent the rotor 18-3 from coming out of the case 14-3. Further, the O-ring 25a attached to the flange portion 25, the O-ring 26a attached to the through hole 26, and the O-ring 32a attached to the bearing plate 32 prevent leakage of filled oil (viscous fluid).
Note that an adhesive is applied to the screw member 34 to prevent loosening.
According to the third embodiment, by the discontinuation of the cover 37 can be set the shape of the external connection shaft 21 which extends outside the casing 14 -3 to any size.
[0024]
That is, it is not necessary to insert the through-hole formed in the cover 37 with the external connection shaft 21 of the rotary shaft 20 having a small diameter as in the third embodiment, and the cross-section is reduced to a non-circular shape, spline or key. There is no need to separately provide an external shaft formed for coupling and to penetrate through the cover 37 and to be fitted and coupled to the rotary shaft 20.
According to the configuration of the oil damper device 60, the external connection shaft 21 formed integrally with the rotor member 18-3 can have an outer diameter dimension equal to or greater than the outer diameter of the case 14-3, or can be freely dimensioned and shaped. Can hold the possibility of setting.
[0025]
The oil damper device 70 manufactured according to the fourth embodiment shown in FIG. 7 uses a resin molded product for the rotor 18-4, and sandwiches the bearing plate 35 instead of the screw member 34 of the third embodiment so that the rotary shaft 20 By forming the locking portion 20d by ultrasonic welding or caulking of the shaft portion 20b-4, it is possible to reliably prevent the rotor 18-4 from coming off from the case 14-4.
[0026]
As in the oil damper device 80 manufactured according to the fifth embodiment shown in FIG. 8, the retaining ring 36 is used in the axial direction on the shaft portion 20b-5 extending outward from the surface 27 formed on the case 14-5. May be prevented from moving.
The retaining ring 36 is irreversibly elastically deformed at a part of its inner diameter, and is engaged with the shaft portion 20b-5. That is, the attaching work is extremely simple and efficient only by pushing the retaining ring 36 into the shaft portion 20b-5. It can be applied to the rotor 18-5 of either a resin molded product or a metal product.
[0027]
Although the embodiments have been described above, the present invention is not limited to the illustrated embodiments, and various modifications and re-parts of parts can be made with respect to the shapes and configurations without departing from the structural requirements of the present invention. It is anticipated that various modifications may be made, such as swapping configurations and combinations in the examples.
[0028]
For example, according to the damper device which is more produced in the present invention, not only for the toilet seat / toilet lid, lightly in one direction is hinged such as door closer and trash cover, slowly in the opposite direction Even if it is applied to a moving body that is desired to operate, it can exert its effect and is versatile.
Further, although an O-ring is used as the seal member, other seals such as rubber packing, Y packing, and V packing may be used.
[0029]
【The invention's effect】
As apparent from the above description, the damper device using a more manufactured viscous fluid to the present invention, according to the description of claim 1, and a cylindrical member having a cylindrical inner surface, said inner surface and a radial direction Opposed to the inside of the cylindrical member opposed to each other, a space formed by cooperation between the outer peripheral surface of the shaft body and the inner surface of the cylindrical member, and formed in the cylindrical member. is a partition wall projecting toward the space, is provided on the shaft body, said damper device der the viscous fluid with a viscous fluid and a chaos that blades and check valve is, in the shaft body Has a flange portion having a diameter larger than the diameter of the shaft portion of the shaft body and having a first viscous fluid pressure receiving surface of the viscous fluid, and the cylindrical member has a second viscosity of the viscous fluid. A fluid pressure-receiving surface, and a small-diameter opening having a diameter equivalent to the diameter of the shaft portion; A large-diameter opening having a diameter equivalent to the diameter of the flange portion, and a first seal member is provided between the flange portion and the large-diameter opening portion between the shaft portion and the small-diameter opening portion. In the manufacturing method of the damper device provided with the second seal member, a guide member that fits into the small-diameter opening is inserted, and in the space temporarily provided in cooperation with the guide member and the inner surface of the cylindrical member After injecting a predetermined amount of the viscous fluid, the guide member and the shaft body are replaced, so that oil injection from a large-diameter opening can easily and easily inject high-viscosity viscous fluid and set the damper characteristics It becomes easier to improve. In addition, since the injection area is large, the work time is shortened and the loss due to the overflow of the viscous fluid is reduced, so that the assembly work can be performed easily.
In addition, since the viscous fluid is sealed by the first and second sealing members, the number of sealed portions is minimized, and the reliability for preventing oil leakage can be improved.
[0030]
Furthermore, the damper device which uses more manufactured viscous fluid to the present invention, according to the description of claim 2, first, the second seal member, because it is sealed by using an O-ring, Processing assembly becomes easy, and the certainty of oil leakage prevention increases.
[0032]
Moreover, a manufacturing method of a damper device using a viscous fluid according to the present invention, according to the description of claim 3, wherein the guide member, the same diameter and the shaft portion of the shaft body, inserted into the small diameter opening The guide member includes an engaging portion engageable with the shaft portion, and the shaft portion engages with an engaging portion formed at an end portion of the guide member. Since the member and the shaft body are replaced, the viscous fluid filling operation is simplified, and both the operation time and cost are advantageous.
[Brief description of the drawings]
[1] a sectional view of a first embodiment of a damper device using a more manufactured viscous fluid to the present invention, (a) cross-sectional view taken along the axis of rotation, (b) the cross section perpendicular to the rotation axis FIG.
2A and 2B are schematic diagrams for explaining the operation of a check valve in the damper device using the viscous fluid shown in FIG. 1, in which FIG. 2A shows a state during braking and FIG. 2B shows a state during idling.
It is a schematic sectional view explaining the manufacturing method of the damper device using a more manufactured viscous fluid in the present invention; FIG.
FIG. 4 is a perspective view of FIG.
5 is a schematic axial sectional view of a second embodiment of the damper device using a more manufactured viscous fluid to the present invention.
6 is a schematic axial sectional view of a third embodiment of the damper device using a more manufactured viscous fluid to the present invention.
7 is a schematic axial sectional view of a fourth embodiment of the damper device using a more manufactured viscous fluid to the present invention.
8 is a schematic axial sectional view of a fifth embodiment of the damper device using a more manufactured viscous fluid to the present invention.
FIG. 9 is a schematic operation explanatory view of a damper device using a viscous fluid manufactured by a conventional manufacturing method .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 (Oil) damper apparatus using viscous fluid 14 Case 16 Partition 18 Rotor 20 Rotating shaft 22 Rotary blade 25 Flange 27 Partition 29 Notch 30 Check valve 32 Bearing plate 34 Screw member 35 Bearing plate 36 Retaining ring 37 Cover 40 Guide bar

Claims (3)

Formed in cooperation with a cylindrical member having a cylindrical inner surface, a shaft body arranged radially inside the cylindrical member so as to face the inner surface, and an outer peripheral surface of the shaft body and an inner surface of the cylindrical member is a space where the viscous fluid is filled, is formed on the cylindrical member, a partition wall projecting toward the space, is provided on the shaft body, and a said viscous fluid chaos that wing and a check valve and Ri damper device der with viscous fluid, the axially body, have a flange portion having a first fluid pressure receiving surface of said viscous fluid with having a diameter larger than the diameter of the shaft portion of the shaft body The cylindrical member includes a second viscous fluid pressure receiving surface of the viscous fluid, a small diameter opening having a diameter equivalent to the diameter of the shaft portion, and a large diameter having a diameter equivalent to the diameter of the flange portion. And forming a first seal member between the shaft and the small-diameter opening. , Wherein the flange portion and the second seal member between the large diameter opening provided, the first, the viscous fluid by the second sealing member is a method of manufacturing the damper device Ru sealed, the A guide member that fits into the small-diameter opening is inserted, and after a predetermined amount of the viscous fluid is injected into a temporary space in cooperation with the guide member and the inner surface of the cylindrical member, the guide member and the shaft body are replaced. A method for manufacturing a damper device using a viscous fluid. The method for manufacturing a damper device using a viscous fluid according to claim 1, wherein the first and second sealing members are sealed by using an O-ring.   The guide member has the same diameter as the shaft portion of the shaft body and can be inserted into the small-diameter opening, and an end portion of the guide member includes an engaging portion that can be engaged with the shaft portion, 2. The damper device using a viscous fluid according to claim 1, wherein the shaft portion is engaged with an engaging portion formed at an end portion of the guide member, and the guide member and the shaft body are replaced. Production method.

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