JPH02245533A - Check valve and rotating damper using this valve - Google Patents

Abstract

PURPOSE:To prevent leakage of a fluid without setting a limit to mounting position by providing a partition member in which a through hole having a taper part is formed, and a valve which is composed of a blocking member that abuts on the taper part so as to block the through hole and of an engaging stoppage member, and which has a conducting hole, on an edge part provided between two chambers. CONSTITUTION:When the pressure of direction indicated by an arrow 'a' works on a check valve A, a blocking member 3a of a valve 3 is energized on the side of a taper part 2a of a through hole 2, and a blocking surface 3a1 is pressure-contacted by the taper part 2a, so as to prevent leakage of a fluid. When the pressure of a direction indicated by an arrow 'b' works on the check valve A, an engaging stoppage member 3b is energized on the side of a partition member 1 and is pressure-contact, whereby the valve 3 is moved in the direction indicated by the arrow 'b' as far as it is longer than the length of a hole 2b of a drum part 3c. The blocking member 3a is separated from the taper part 2a, while an opening port 3f of the drum part 3c faces the taper part 2a, and a channel is formed by the through hole 3e, and by the opening port 3f, for a fluid on the side of the channel C to flow on the side of a channel B. By providing the check valve on a moving blade of the rotational member, leakage of a working fluid can be prevented when the moving blade is turned to the side of the blocking member of the valve.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a check valve for allowing fluid to flow in only one direction, and a rotating body that rotates within a certain angle range using the check valve. This invention relates to a rotary damper for applying braking force to a rotary damper.

<Prior art> Conventionally, check valves that allow fluid to flow in only one direction include lift valves, swing valves, etc., in which the weight of the valve body brings the valve body into contact with the valve seat. 2. Description of the Related Art Check valves, or check valves in which a valve body is biased by a spring and brought into contact with a valve seat, are provided.

In addition, rotation that can apply braking torque according to the torque value to a rotating body that reciprocates within a certain angle range and whose torque value fluctuates depending on the rotation angle, such as a lid that opens and closes up and down. A damper is proposed.

The rotary damper forms a fluid chamber filled with working fluid and a conduction chamber, and has a plurality of orifs for circulating the working fluid between the fluid chamber and the conduction chamber.

The fluid chamber is divided into a plurality of fluid chambers by forming a chair and accommodating movable blades connected directly or indirectly to the rotating body in this fluid chamber.

In the rotary damper configured as described above, when the movable blade rotates in a predetermined direction, the working fluid filled in the fluid chamber flows into the conduction chamber through the orifice, and the resistance at this time causes the damper to be damped. Torque is generated. Then, as the movable blade rotates, the orifice is sequentially closed, so the resistance increases and the braking torque generated accordingly also increases.

Furthermore, when the movable vane is rotated in the opposite direction to the above direction, a large amount of working fluid flows from one fluid chamber to the other fluid chamber via the check valve provided on the movable vane, so no braking torque is generated. .

When the rotary damper configured as described above is used for a vertically opening/closing lid such as a cover of a mechanical device, it is possible to generate an effective braking torque when the lid is closed, so that the opening/closing lid closes with an impact. There's nothing to do.

The check valve used in the rotary damper has a through hole formed in the movable vane for circulating the working fluid, and a flange formed at one end of the shaft with a diameter larger than the diameter of the through hole. It is constructed by fitting a valve body with a split pin or the like attached to the end.

When the movable vane rotates in a direction that should generate braking torque, it closes and applies the rotational force of the rotating body to the working fluid, and when the movable vane rotates in a direction that does not generate braking torque, it closes and opens. The valve is configured to allow a large amount of working fluid to flow from one fluid chamber to the other fluid chamber via the check valve.

<Problems to be Solved by the Invention> Among the above-mentioned check valves, lift valves and swing valves have limitations in the mounting position, and if the valve is mounted in a position other than the predetermined position, it is difficult to function as a check valve. There is a power that cannot be exercised. Additionally, spring-biased check valves have a complex structure;
It may not be possible to store it in a limited small space.”
Ru.

Further, in the check valve of the rotary damper, the working fluid flows through a flow path formed between the through hole and the shaft of the valve body. As a result, the valve body may tilt within the through hole, resulting in an incomplete seal in the reverse valve. If the seal is incomplete in this way, the working fluid will leak when the movable blade rotates in the direction in which braking torque should be generated, making it impossible to generate the predetermined braking torque that was set in advance at the design stage. There is a possibility that it will not happen.

An object of the present invention is to provide a check valve that can be installed in any orientation and prevent leakage of working fluid, and to prevent leakage and generate a predetermined braking torque by providing the check valve on a movable vane. The present invention provides a rotary damper that can perform

<Means for solving l1m> In order to solve the above problems, the check valve of the present invention is provided between two chambers filled with fluid and allows the fluid to flow in only one direction. a partition member provided between the two chambers and having a tapered portion at an end thereof and forming a through hole for flowing a working fluid; a closing member for contacting the tapered portion to close the through hole; a valve body having a body formed by connecting a locking member having a dimension larger than the diameter of the through hole, and a conduction hole formed inside the body from the locking member side; The tapered portion of the through hole and the closing member of the valve body are fitted in correspondence with each other.

Further, in a rotary damper, a movable vane is housed in a fluid chamber filled with working fluid so as to be rotatable within a predetermined angular range, and the movable vane is provided with a check valve configured as described above. It is composed of

Function> In the check valve configured by the above means, the tapered portion of the through hole formed in the partition member has a function as a valve seat. Therefore, when a valve body is fitted into the through hole, the through hole, which serves as a fluid circulation hole, can be closed by the closing member of the valve body coming into contact with the tapered portion. That is, when pressure is generated in the fluid on the closing member side of the valve body, this pressure causes the closing member to come into pressure contact with the tapered portion, thereby closing the through hole. At this time, the flow of fluid through the through hole was blocked by the check valve, preventing leakage from one chamber to the other, and pressure was generated in the fluid on the locking member side of the valve body. In this case, this pressure acts on the through hole formed inside the locking member and the valve body,
The locking member is pressed against the partition member. At this time, the closing member is separated from the tapered portion, and the fluid flows in one direction through the through hole formed inside the valve body.

Furthermore, in a rotary damper, by dividing a fluid chamber filled with working fluid with movable blades, the movable blades can function as a partition member.

By providing the movable vane with a check valve configured as described above, when the movable vane is rotated toward the closing member of the valve body, leakage of working fluid in the check valve is prevented. I can do it.

<Example> An example of a rotary damper using a check valve and a cough check valve to which the above means are applied will be described below with reference to the drawings.

Fig. 1 is a schematic explanatory diagram of the check valve, Fig. 2 (A) is an explanatory diagram when it is closed, Fig. 2 (B) is an explanatory diagram when it is open, Fig. 3 is an explanatory diagram of the partition member, and Fig. 4 The figure is an explanatory view of the valve body, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4.

In the figure, check valve A is provided between two flow paths B and C. The flow of the fluid from the flow path B to the flow path C is blocked, and the fluid is allowed to flow in only one direction from the flow path C to the flow path B.

The flow paths B and C are partitioned by a partition member 1.

A through hole 2 is formed in a predetermined position of this partition member l. A tapered portion 2a is formed on the flow path B side of the through hole 2, and a through hole 2b is formed on the flow path C side continuous with the tapered portion 2a.

A through hole 2 is provided at the end of the valve body 3 that is fitted into the through hole 2.
A closing member 3a corresponding to the tapered portion 2a is formed, and a locking member 3b is formed at the other end. The closing member 3a and the locking member 3b are connected by a body portion 3c. A conduction hole 3e is formed inside the body portion 3c from the locking member 3b side to the bottom portion 3d of the closing member 3a.

Furthermore, openings 3f are formed on both side surfaces of the body 3c near the bottom 3d.

In this embodiment, the closing member 3a has a spherical shape as shown in the figure. The outer surface of the closing member 3a is formed as a closing surface 3at that comes into contact with the tapered portion 2a of the through hole 2 to close the fluid passage, and the inner surface is formed as a pressure receiving surface 3al on which the pressure of the fluid acts. There is.

By forming the closing member 3a in a spherical shape, the tapered portion 2a of the through hole 2 and the closing surface 3a+ of the closing member 3a are brought into line contact and the contact pressure is increased, thereby improving the sealing performance at the contact portion. It becomes possible to improve the performance.

The locking member 3b has a flange shape. For example, when the valve body 3 is manufactured by flexible plastic molding, the locking member 3b can be molded integrally with other parts, that is, the closing member 3a and the body 3c. For example, when the locking member 3b is made of metal such as brass, the locking member 3b can be manufactured separately from the closing member 3a and the body 3c, and then fixed to each other by screws or adhesive. Further, the locking member 3b does not necessarily have to be formed into a flange shape, and may be formed into a plurality of radial projections.

The locking member 3b is formed to have an outer diameter larger than the diameter of the through hole 2b of the through hole 2, and as shown in FIG. 2 (8), when fluid pressure is applied in the direction indicated by the arrow, , the locking member 3b engages with the partition member l to restrict movement of the valve body 3.

The body portion 3c connects the closing member 3a and the locking member 3b, and is formed to have a dimension larger than the length of the through hole 2b of the through hole 2.

Further, it is preferable that the outer diameter of the body portion 3c is slightly smaller than the diameter of the through hole 2b.

By forming the body portion 3c with the dimensions described above, when the valve body 3 is fitted into the through hole 2, the valve body 3 can freely move in the axial direction, and the through hole 2 Therefore, the closing member 3 does not tilt when fitted to the
The closed surface 3a+ of a can always be in contact with the tapered portion 2a in a substantially constant state.

A conduction hole 3e having a length extending from the locking member 3b side to the bottom portion 3d of the closing member 3a is formed inside the body portion 3c. Furthermore, openings 3f are formed on both side surfaces of the body 3C near the bottom 3d. The conduction hole 3e and the opening 3f serve as a flow path for allowing fluid to flow in the direction indicated by the arrow, as shown in FIG. 2(B).

The valve body 3 configured as described above may be made of metal such as brass, but is preferably made of a flexible plastic molded product.

By forming the valve body 3 using a flexible plastic material, responsiveness to the pressure acting on the fluid in the closing member 3a can be improved.

Next, the case where the valve body 3 is fitted into the through hole 2 will be explained.

When the valve body 3 is molded from a plastic material, the locking member 3 is pressed while the valve body 3 is crushed.
The fitting can be achieved by inserting b into the through hole 2 from the tapered portion 2a side. In addition, when the valve body 3 is molded from metal, the closing member 3a or the locking member 3b
For example, if the closing member 3a and body portion 3c are integrally molded, and the locking member 3b is separately molded,
After inserting the body portion 3c from the tapered portion 2a side of the through hole 2,
Fitting can be achieved by fixing the locking member 3b to the end of the body 3c using screws, adhesive, or other means.

Next, a case will be described in which the check valve A configured by fitting the valve body 3 into the through hole 2 allows fluid to flow or be blocked.

FIG. 2(A) shows a state in which pressure is applied to the check valve A in the direction of arrow a. At this time, the closing member 3a of the valve body 3 is urged toward the tapered portion 2a of the through hole 2, and the closing surface 3a is pressed against the tapered portion 2a to prevent fluid leakage at the contact portion. There is.

FIG. 2(B) shows a state in which pressure is applied to the check valve A in the direction indicated by the arrow. At this time, the engaging member 3b of the valve body 3 is urged toward the partition member l side and is brought into pressure contact with the body 3C.
It moves in the direction of the arrow (to the left in the figure) by an amount greater than the length of the through hole 2b.

Therefore, the closing member 3a is separated from the tapered portion 2a, and at the same time, the opening 3f formed in the body portion 3C faces the tapered portion 2a. In this way, the through hole 3e is formed inside the valve body 3 from the flow path C side to the flow path B side.

By forming a flow path by the opening 3f, fluid on the flow path C side flows to the flow path B side.

As mentioned above, the fluid flows in only one direction from channel C to channel B, and no flow from channel B to channel C occurs.

As explained above, the check valve A of this embodiment has a partition member l.
Since the valve body 3 is fitted into the through hole 2 formed in the valve body 2, the mounting space can be reduced and the mounting posture is not restricted.

Furthermore, by forming the closing member 3a in a spherical shape, the through hole 2
The contact area with the tapered portion 2a can be widened. Therefore, even if the body portion 3c of the valve body 3 is tilted in the through hole 2b, the closing member 3a can be brought into contact with the tapered portion 2a.

Therefore, a good contact state between the tapered portion 2a and the closing member 3a can be maintained at all times, so that fluid leakage in the check valve 3 does not occur.

Next, a rotary damper to which the check valve A configured as described above is applied will be explained.

Figure 6 is a cross-sectional explanatory diagram of the rotary damper, and Figure 7 is the
−■ It is a view from the arrow.

In the figure, a transmission member 7 for transmitting the rotational force from a rotating body (not shown) to the movable blade 6 is provided in a chamber formed inside the cylindrical casing 5. The fixed partition member 9 provided is inserted and the ring screw 1 is inserted.
0, each member is held in a predetermined position and fitted.

The chamber of the casing 5 is formed by a dividing wall 9a of the fixed partition member 9.
is divided into a fluid chamber 11 and a conduction chamber 12, and two fluid chambers 11a are divided by the movable blade 6 and the dividing blade 8.
, llb. Further, a plurality of orifices 13a to 13d are formed in the dividing wall 9a. The fluid chamber 11. The conduction chamber 12 is filled with an incompressible working fluid such as silicone oil.

Predetermined position of the movable blade 6! is provided with a check valve A configured as described above. As shown in FIG. 7, this check valve A has a closing member 3a of the valve body 3 disposed on the fluid chamber tia side. Therefore, the engaging member 3b of the valve body 3 is arranged on the fluid chamber 11b side.

In the rotary damper having the above structure, the movable blade 6 does not perform unlimited rotational movement, but in this embodiment reciprocating rotational movement of about 110 degrees.

The operation of the rotary damper configured in this way will be explained.

The rotational force of a reciprocating rotating body such as a vertical opening/closing lid (not shown) is transmitted to the transmission member 7.

For example, when the rotating direction of the rotating body is in the direction of arrow C, the working fluid in the fluid chamber 11a receives a compressive force due to this rotation, and due to the action of this compressive force, the valve body 3 in the check valve A The closing member 3a is urged toward the tapered portion 2a of the through hole 2 formed in the movable blade 6. As described above, the closing surface 3a1 of the closing member 3a comes into pressure contact with the tapered portion 2a, and the through hole 2
will be closed.

At the same time, the working fluid filled in the fluid chamber 11a is discharged into the conduction chamber 12 via the orifices 13a to 13d, and the resistance generated at this time becomes a braking force.

As the movable layer ll16 rotates in the direction of arrow C,
When the orifices 13a, 13b-13d are sequentially closed by the movable blade 6, the flow path area decreases one after another, and the resistance increases accordingly. That is, the braking force can be increased. The working fluid discharged from the fluid chamber 11a to the conduction chamber 12 as described above is accommodated in the fluid chamber 11b from the conduction chamber 12 through the conduction hole 14 formed in the dividing wall 9a.

For example, when the rotating direction of the rotating body is in the direction of arrow d, the working fluid in the fluid chamber 11b receives a compressive force due to this rotation, and due to the action of this compressive force, the valve body of the check valve A The locking member 3b of No. 3 is urged toward the movable blade 6 side. Then, as described above, the closing member 3a is separated from the tapered portion 2a,
A flow path is formed inside the valve body 3 by the conduction hole 3e and the opening 3f.

Therefore, the working fluid in the fluid chamber 11b flows into the fluid chamber 11a through the through hole 3e and opening 3f of the valve body 3. At this time, almost no braking force is generated.

In the rotary damper configured as described above, the outer diameter of the body 3C of the valve body 3 constituting the check valve A is the same as that of the through hole 2 of the through hole 2.
Since it is formed with a diameter slightly smaller than the diameter of b, it is possible to ensure that the closing member 3a is brought into contact with the tapered portion 2a when it is fitted into the through hole 2 (no worries). Therefore, the braking torque set at the design stage can always be generated.

<Effects of the Invention> As explained in detail above, the check valve of the present invention is constructed by forming a through hole having a tapered portion at the end in the partition member, and fitting the valve body into the through hole. The tapered portion of the through hole formed in the partition member functions as a valve seat. Therefore,
When a valve body is fitted into the through hole, a closing member of the valve body comes into contact with the tapered portion, thereby closing the through hole that serves as a fluid communication hole. At this time, the flow of fluid through the through hole is blocked by the check valve, and leakage from one chamber to the other chamber can be prevented.

Further, when pressure is generated in the fluid on the locking member side of the valve body, this pressure acts on the locking member and the through hole formed inside the valve body, so that the locking member comes into pressure contact with the partition member. At this time, the closing member is separated from the tapered portion, and the fluid flows in one direction through the through hole formed inside the valve body.

Therefore, a reliable check valve can be obtained with a simple structure.

Further, in the rotary damper, a fluid chamber filled with working fluid is divided by a movable vane, so that the movable vane can function as a partition member. By providing the movable vane with a check valve configured as described above, when the movable vane is rotated toward the closing member of the valve body, leakage of working fluid in the check valve is prevented. I can do it.

Therefore, it has features such as being able to generate a preset braking force more than 11 times.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of the check valve, Fig. 2 (A) is an explanatory diagram when it is closed, Fig. 2 (B) is an explanatory diagram when it is open, Fig. 3 is an explanatory diagram of the partition member, and Fig. 4 The figure is an explanatory diagram of the valve body, Fig. 5 is a cross-sectional view taken along the line V-V in Fig. 4, and Fig. 6 is a cross-sectional explanatory diagram of a one-turn damper.
FIG. 7 is a view from the ■-■ arrow in FIG. 6. A is a check valve, B and C are flow paths, 1 is a partition member, 2 is a through hole, 2a is a tapered portion, 2b is a through hole, 3 is a valve body, 3a is a closing member, 3at is a closing surface, 38g is a pressure receiving surface, 3b is a locking member, 3C is a body, 3d is a bottom, 3e is a conduction hole, 3f is an opening, 5 is a casing, 6 is a movable blade, 7 is a transmission member, 8
1 is a dividing blade, 9 is a fixed partition member, 11 is a fluid chamber, 12 is a conduction chamber, 13a to 13d are orifices, and 14 is a guide hole. Patent applicant: Koike Sanso Kogyo Co., Ltd. Agent: Shukichi Nakayo Figure 1 Figure 6 Figure 7 Figure 3 Figure 5 (A) (B)

Claims (2)

[Claims] (1) In a check valve provided between two chambers filled with fluid to allow the fluid to flow in only one direction, the check valve is provided between the two chambers and has a tapered portion at the end to allow the working fluid to flow. A body formed by connecting a partition member with a through hole formed therein, a closing member that comes into contact with the tapered portion to close the through hole, and a locking member having a dimension larger than the diameter of the through hole. and a valve body having a conduction hole formed inside the body from the locking member side, and a tapered part of the through hole and a closing member of the valve body are fitted in correspondence with each other. A check valve characterized by the following configuration. (2) In a rotary damper configured by storing a movable vane rotatably within a predetermined angular range in a fluid chamber filled with working fluid, the movable vane is provided with a check valve according to claim (1). A rotary damper with a unique feature.