JPH10288237A - Opening and closing valve device of soft closed damper mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sealing performance and durability between a movable valve and a movable shaft which can rotate normally and reversely within a casing, in an opening/closing valve device in a soft closed damper mechanism in which the movable shaft displays a damper effect by hydraulic fluid only within a prescribed rotating angle range. SOLUTION: A soft closed damper mechanism has blade parts 2d, 2e at a symmetrical location and is provided with a movable shaft 2 which is freely rotatable within a casing 1, a movable vale 3 fitted into a valve seat 5 which is internally provided in the casing 1 so that the valve 3 may freely change, a projectingly provided part 1b which is internally provided on the casing 1 at a location opposed to the movable valve 3 and hydraulic fluid (a) filled in partition chambers A, B petitioned within the casing 1 by a pair of blade parts 2d, 2e. In the movable valve 3, the end face is a prismatic shape and a recessed curved surface which has substantially the same curvature as the outer peripheral wall surface 2c of the movable shaft is formed on the side surface 3a. This recessed curved surface freely comes into surface contact with the outer peripheral wall surface 2c when the movable valve 3 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flap door or the like, which uses hydraulic oil and utilizes the viscous resistance of the hydraulic oil. The present invention relates to an on-off valve device in which the above-mentioned hydraulic oil can be opened and closed by a movable valve in a timely manner in a soft closing damper mechanism which can be used in various applications.

[0002]

2. Description of the Related Art Conventionally, in a soft closing damper mechanism of this kind, as can be understood with reference to FIG. 1, a casing and a pair of rotary members which rotate while sliding on the inner peripheral wall surface of the casing. The blade portion is provided at a symmetrical position, and the movable shaft is rotatably fitted in the casing, and the inner peripheral wall surface of the casing has a movable portion in a diametrical direction. By being fitted and arranged as such, a pin-shaped movable valve slidable on the outer peripheral wall surface of the movable shaft, and at a position facing the movable valve, protruding from the inner peripheral wall surface of the casing, And, the projecting portion on which the outer peripheral wall surface of the movable shaft slides, between the casing and the movable shaft,
2. Description of the Related Art There is known a configuration in which a compartment divided into two by a pair of blades is filled with hydraulic oil for filling.

[0003]

However, when the soft closing damper mechanism described above is used, the movable valve is formed in a pin shape, and this comes into line contact with the outer peripheral wall surface of the movable shaft. Even if a slight gap is formed between the outer peripheral wall surface of the movable shaft and the movable valve having a circular cross section, the hydraulic oil unintentionally passes through the gap when the movable shaft rotates. As a result, the room flows into another compartment, and the performance related to the damper force is impaired. In order to prevent this, considerably precise processing is required for the outer peripheral wall surface of the movable shaft, the pin-shaped movable valve, and the like. As a result, the productivity is significantly reduced, and the product is considerably expensive. It will become something. Furthermore, as described above, the movable shaft and the pin-shaped movable valve are in linear contact, and therefore, in a configuration in which the contact area between the two is small, early wear between the outer peripheral wall surface of the movable shaft and the movable valve is unavoidable. Therefore, satisfactory results have not been obtained in terms of durability.

The present invention has been made in view of the above-mentioned problems of the opening / closing valve device in various conventional soft closing damper mechanisms, and has been made so that the movable valve is brought into appropriate surface contact with the outer peripheral wall surface of the movable shaft. In order to obtain a sufficient contact area, thereby improving the sealing performance and durability, the response at the time of the closing operation of the movable valve, to improve the stability thereof, That is the purpose.

[0005]

According to the present invention, in order to achieve the above object, a pair of wings are provided at a symmetrical position on a casing and an outer peripheral wall so as to be slidable with an inner peripheral wall of the casing. A cylindrical movable shaft rotatably disposed in the casing, and an inner peripheral wall surface of the casing such that an outer peripheral wall thereof is slidable by relative rotation of the movable shaft with respect to the casing. A movable valve which is disposed so as to be movable in a valve seat provided in the valve, and a position facing the movable valve from an inner peripheral wall surface of the casing so that an outer peripheral wall thereof can slide by rotation of the movable shaft. A working oil that is filled in a pair of compartments that are circumferentially partitioned between the casing and the movable shaft by the two blades, Rotating casing and outer peripheral wall A pair of blades are provided at symmetrical positions so as to be slidable with respect to the inner peripheral wall surface of the casing, and a columnar movable shaft disposed rotatably in the casing; A movable valve disposed on a valve seat provided on an inner peripheral wall surface of the casing so that the outer peripheral wall surface can slide by a relative rotation with respect to the casing; Accordingly, a projecting portion projecting from the inner peripheral wall surface of the casing to a position facing the movable valve so that the outer peripheral wall surface can slide, and between the casing and the movable shaft by the two blades in the circumferential direction. In a soft closing damper mechanism in which the movable valve is brought into a valve closing operation state by hydraulic fluid filled in a pair of partitioned compartments and rotation of the movable shaft in one direction, the movable valve has a square shape. Case-shaped column The valve seat, which is internally recessed in the housing, is fitted and disposed so as to be freely movable in the diameter direction, and one side surface thereof is formed as a concave curved surface having substantially the same curvature as the outer peripheral wall surface of the movable shaft. Thus, there is an attempt to provide an opening / closing valve device for a soft closing damper mechanism, wherein the valve can be freely closed in a surface contact state with the outer peripheral wall surface of the movable shaft.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the soft closing damper mechanism illustrated in FIGS. 1 to 4, 1 is a casing, 2 is a movable shaft, Reference numeral 3 denotes a movable valve, and in FIGS. 3 and 4, reference numeral 4 denotes a screw cap and a bearing.

The casing 1 has a horizontally long cylindrical shape, and has an inner peripheral wall 1a formed at an intermediate portion in the axial direction thereof.
As described later, an outer peripheral wall surface 2c of the movable shaft 2 is slid.
The protruding portion 1b is protruded, and a valve seat 5 is formed on the side facing the protruding portion 1b so as to be long inward in the axial direction toward the inside,
The movable valve 3 is fitted to the valve seat 5 so as to be movable in the diameter direction of the casing 1. The valve seat 5 shown in FIG. 4 has a valley 5 between a pair of ridges 5a and 5b.
c is formed in a concave shape, and the one peak 5
a has a cut-out passage 5d through which the hydraulic oil a can flow as described later by being provided so as to be shorter than the other peak 5b.

The movable shaft 2 is formed in a horizontally long cylindrical shape having a step portion on the outer periphery, a small diameter connecting shaft portion 2a fixed to a flap door or the like (not shown) at a front end portion, and an intermediate portion. Are formed with large-diameter bearing portions 2b which are rotatably supported on the casing 1 and an outer peripheral wall surface 2c of a rear end portion which is formed slightly smaller in diameter than the above-mentioned bearing portion 2b. , Two blade portions 2d and 2e that slide on the inner peripheral wall surface 1a of the casing 1 are provided at symmetrical positions and protrude therefrom.

Further, in the illustrated embodiment, as shown in FIGS. 1, 2 and 4, at a substantially axially intermediate portion of the outer peripheral wall 2c of the movable shaft 2 in order to cope with the purpose of use. Two concave grooves 6 and 7 are provided symmetrically, and these concave grooves 6 and 7 are respectively provided with the blade portions 2d and 2e.
Are formed in the circumferential direction from the base end side of the
The base 2e is engraved by a predetermined length so as to be deep on the base side and gradually become shallower in the circumferential direction.

The movable shaft 2 is, as shown in FIG.
In the annular concave portion 2f provided around the support portion 2b, in a state where the O-ring 8 is fitted and protruded, the O-ring 8 is inserted into the casing 2 from the front end side and from the rear end side (left side in FIG. 3),
The bearing portion 2b is fitted and disposed in the shaft hole 1c of the casing 1 so as to be rotatable in a liquid-tight state. Further, a screw cap / bearing 4 is screwed to the female screw portion 1d, which is a rear part in the casing 1, via an O-ring 9 in a liquid-tight state, and is protruded from the center of the inner end face of the screw cap / bearing 4. The shaft portion 4a is fitted into a bearing hole 2g formed in the center of the rear end surface of the movable shaft 2 so that the movable shaft 2 is supported in the casing 1 so as to be rotatable in a liquid-tight state. ing.

In this manner, the soft closing damper mechanism is assembled, but the movable valve 3 is fitted and disposed on the valve seat 5 in advance, and the inside of the casing 1 is divided into two by the above described blades 2d and 2e. After injecting a predetermined amount of hydraulic oil a into the partitioned compartments A and B, the screw cap / bearing 4 is screwed onto the female screw portion 1d of the casing 1 to complete the assembling work. Become.

Accordingly, when the soft closing damper mechanism is used, as shown in FIG. 2, when the flap door or the like is closed, the maximum rotation angle α of the movable shaft 2 is set to, for example, 11
If the angle is set to 0 °, when the movable shaft 2 is at the position a shown by the solid line in the drawing, the above-described concave grooves 6 and 7 are provided when the concave grooves 6 and 7 are provided as described above. The groove 7 and the movable valve 3, and the concave groove 6 and the projecting portion 1 b face each other to form a passage, whereby the compartments A and B communicate with each other. Does not occur.
When the movable shaft 2 is rotated from the position a to the position b in the direction indicated by the arrow c in the same figure, for example, by 50 °, the shallowly formed portions at the tips of the concave grooves 7 and 6 are removed. ,
Since the movable valve 3 and the protruding portion 1b are opposed to each other, the hydraulic oil a flows between the compartments A and B by a smaller amount than before. Further, when the movable valve 2 has been rotated by 60 ° from the position B to the position C shown in the figure, the concave grooves 7 and 6 are displaced in the circumferential direction to move the movable valve 3 and the projecting portion 1b. The movable valve 3 and the projecting portion 1b are not opposed to each other.
c, the movable valve 3 is brought into the valve-closing operation state, and the compartment A and the compartment B are shut off, so that the pressing force of the hydraulic oil a inside the compartment A causes the inner circumference of the casing 1 to be closed. Through a minute gap between the wall surface 1a and the two blade portions 2d and 2e,
Since the working oil a inside the compartment A flows into the inside of the compartment B by a very small amount, a strong damper force is exerted by viscous resistance of the working oil a inside the compartment A.

In this soft closing damper mechanism, when the movable shaft 2 is turned from the position C to the position A in FIG. 1 in the direction of arrow b shown in FIG. Since the passage 5d is in the open state, the hydraulic oil a in the compartment B flows out of the compartment B into the compartment A, so that the hydraulic oil a does not exert a large damper effect from the beginning of rotation.

Further, in the present invention, in the soft closing damper mechanism as described above, the opening / closing valve device using the movable valve 3 is configured as follows. That is, as shown in FIG. 1, FIG. 2 and FIG. 4, the movable valve 3 has an end surface formed in a prism shape of a substantially equilateral triangle shape, and each side surface 3a, 3b, 3b
, 3c, 3c, and 3a are connected by corners 3c, 3d, and 3f formed on an arcuate surface having an arbitrary radius of curvature R.

In the valve seat 5, as shown in FIGS. 1 and 2, the movable valve 3 has one corner 3e facing outward and the corresponding side surface 3a facing inward, ie, movable. The casing 1 is arranged so as to face the outer peripheral wall 2 c of the shaft 2.
The cross section is formed in a substantially V-shape so as to allow fitting that can be varied in the diametrical direction.

As shown in FIG. 4, the depth d of the valley portion 5c of the valve seat 5 is smaller than the dimension e from the side surface 3a to the corner 3e of the movable valve 3 by a required dimension. In addition to the setting, the opening width f of the valley portion 5c is wider than the dimension g between the two corners 3d and 3f of the movable valve 3 by a required dimension. It becomes easy to receive the pressing force of the hydraulic oil a due to the rotation of 2, and by receiving the pressing force, the inner surface fluctuates inward, so that the side surface 3 a is pressed against the outer peripheral wall surface 2 c of the movable shaft 2. .

Further, the side surface 3a of the movable valve 3 has a concave curved surface formed in the lateral width direction, and the concave curved surface has substantially the same radius of curvature as the outer peripheral wall surface 2c of the movable shaft 2 has in the circumferential direction. The outer peripheral wall 2c is formed with a curvature.
On the other hand, the movable valve 3 comes into surface contact with a wide concave curved surface on the side surface 3a, and has a much larger contact area as compared with the conventional line contact, and also has a good close contact state to improve the sealing performance. Can be improved.

FIG. 5 shows a case where the soft closing damper mechanism according to the present invention is used for the toilet seat 10.
By fixing the casing 1 to the toilet main body 11 and fixing the movable shaft 2 to the base end of the toilet seat 10, the toilet seat 10 is pivotally attached to the toilet main body 11 so as to be freely opened and closed.

The toilet seat 10 attached to the toilet body 11 in this manner is opened upward from the position C, which is the illustrated closed position, and the rotary shaft 2 is rotated (opened) in the direction of arrow b in FIG. At this time, the movable shaft 2 is rotated in the illustrated lower position with respect to the casing 1 fixed to the toilet body 11. Therefore, as described above, since the hydraulic oil a flows through the cutout passage 5d of the valve seat 5 at the beginning of rotation, the movable valve 3 is in the valve-opening operation state. As a result, the hydraulic oil a inside the compartment B becomes the compartment A The toilet seat 10 does not exert a damper force, and therefore, the toilet seat 10 is opened by a slight external force up to the illustrated position B. When the oil passage is formed by the concave grooves 6 and 7 as in the illustrated embodiment after passing the position B, the hydraulic oil a in the compartment B is formed.
Will flow into compartment A more,
The toilet seat 10 is located between the position B and the position A, and can be opened more lightly.

Next, when a force in the closing direction is applied to the toilet seat 10 at the position a where the toilet seat 10 is open, the movable shaft 2 rotates in the direction of the arrow in FIG. 5, ie, the direction of the arrow c in FIG. Since the movable valve 3 is moved (at the time of closing), the movable valve 3 receives the pressing force of the hydraulic oil a in the compartment A and enters the valve-closed operation state. Set groove 7
Flow into the compartment B through the passage, only a small damper force acts.

As a result, in FIG. 5, the damper force acts relatively weakly from the position A where the toilet seat 10 is open to just before the position B in the middle, and when the toilet seat 10 is closed to the position B, the movable shaft 2 in FIG. Is reached, the movable valve 3 is brought into close contact with the outer peripheral wall surface 2c of the movable shaft 2 in a surface contact state by receiving the pressing force of the hydraulic oil a, and the movable oil between the movable valve 3 and the movable shaft 2 is hydraulic oil. a does not flow, the inner peripheral wall surface 1a of the casing
And the blade portion 2e, the projecting portion 1b and the outer peripheral wall 2 of the movable shaft 2.
Only through the small gap between the two, the hydraulic oil a flows into the compartment B from the compartment A, and the amount of the inflow is controlled to a small amount, so that the damper force is maximized, and the toilet seat 10 is shown in FIG. At 5, the vehicle is slowly closed from the position B to the position C.

[0022]

As described above, the present invention relates to an opening / closing valve device in a soft closing damper mechanism of various mechanisms, wherein the movable valve has a prismatic shape, and one side surface thereof comes into surface contact with the outer peripheral wall surface of the movable shaft. Because it was formed as
The contact area with the outer peripheral wall surface of the movable shaft can be remarkably increased as compared with the conventional line-shaped movable valve having a pin-like shape. As a result, the sealing performance between the movable shaft and the movable shaft at the time of closing the valve is improved, the wear due to the forward and reverse rotation of the movable shaft is reduced, and the durability can be improved. Because of the peripheral shape, the sealing performance does not decrease in a short period of time, and therefore, the amount of oil flowing in the groove in the closed state of the valve is kept constant without change. Therefore, the preset damper force can be retained for a long period of time, regardless of whether the damper force is small or large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view for explaining an opening operation of a toilet seat and the like at a movable shaft rotation start position showing an embodiment of an opening / closing valve device of a soft closing damper mechanism according to the present invention.

FIG. 2 is a cross-sectional view for explaining a closing operation of the toilet seat and the like at the maximum rotation position of the movable shaft showing the embodiment.

FIG. 3 is a vertical sectional view taken along line AA 'in FIG.

FIG. 4 is an exploded perspective view of the embodiment with a part cut away.

FIG. 5 is an explanatory side view showing one usage example of the embodiment.

[Explanation of symbols]

 Reference Signs List 1 casing 1a inner peripheral wall surface 1b projecting portion 2 movable shaft 2c outer peripheral wall surface 2d blade portion 2e blade portion 3 movable valve 3a side surface 5 valve seat 6 concave groove 7 concave groove A compartment chamber B compartment oil hydraulic oil

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shingo Seki 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture Totoki Equipment Co., Ltd. (72) Inventor Yojiro Nakayama 1-8 Higashikanda, Chiyoda-ku, Tokyo No. 11 Su Gatsune Kogyo Co., Ltd. (72) Inventor Ryosuke Bando 1-8-11 Higashi Kanda, Chiyoda-ku Tokyo

Claims (1)

[Claims] 1. A casing and a pair of wings protruding at symmetrical positions on an outer peripheral wall surface of the casing so as to be slidable with an inner peripheral wall surface of the casing, and are arranged so as to be rotatable inside the casing. The columnar movable shaft and the movable shaft are disposed so as to be movable in a valve seat provided on the inner peripheral wall surface of the casing so that the outer peripheral wall surface can slide by relative rotation with respect to the casing. A movable valve, a projecting portion projecting from an inner peripheral wall surface of the casing to a position facing the movable valve so that an outer peripheral wall surface can slide by rotation of the movable shaft, and a casing formed by the two blades; And hydraulic fluid that is filled in a pair of compartments circumferentially partitioned between the movable shaft and the movable shaft in one direction,
In the soft closing damper mechanism in which the movable valve is in a valve closing operation state, the movable valve is formed in a prismatic shape, and the valve seat that is internally recessed in the casing is allowed to freely change in a diameter direction. Fitted and disposed, one side surface thereof is formed as a concave curved surface having substantially the same curvature as the outer peripheral wall surface of the movable shaft, and the valve can be closed in a surface contact state with the outer peripheral wall surface of the movable shaft. Opening / closing valve device of soft closing damper mechanism.