JP5041484B2 - Door check device - Google Patents

Description

  The present invention relates to a door check device.

Patent Document 1 listed below describes a one-way valve and a door check device in which the force that holds the valve element is reduced when the valve element is held in the closed position with a large force and moves in the opening direction.
The door check device includes a casing filled with a liquid, a shaft disposed in the casing and rotatably supported by the casing, and provided on a peripheral surface of the shaft. A flap divided into a second chamber, a first conduit, a second conduit provided in the flap such that one opening faces the first chamber and the other opening faces the second chamber; A valve body provided in the first pipe line, the hole part in the first pipe line, provided upstream from the valve body and closed when the valve body is closed, the valve body The first unidirectional valve having an urging means for urging in a direction to close the hole and an outlet provided downstream from the valve body, wherein the urging means has the valve body approaching the hole. The force for closing the hole is increased in accordance with Both exert an always urging force on the valve body in the direction of closing the hole, permitting the flow of liquid from the first chamber to the second chamber, and from the second chamber to the first chamber. A first one-way valve for blocking the flow of liquid; a valve body provided in the second pipe; and a second valve in the second pipe, provided upstream from the valve body, and closing the valve body. A second one-way valve having a hole portion that is closed by this, a biasing means that biases the valve body in a direction to close the hole portion, and an outlet provided downstream from the valve body, The biasing means is formed such that a force for closing the hole is increased as the valve body approaches the hole, and a biasing force is always exerted on the valve body in a direction for closing the hole. , Allowing liquid flow from the second chamber to the first chamber, and liquid from the first chamber to the second chamber And a second one-way valve to prevent flow.

  In this door check device, when the shaft is rotated, the liquid flows through the first pipe line and the second pipe line. When the liquid flows from the first chamber toward the second chamber, the valve body of the first one-way valve of the first pipe is pushed away from the hole by the pressure of the liquid. At this time, since the force for closing the hole is large, a large force (peak torque) is required to move the door. Further, the valve body of the second one-way valve of the second pipe line is pushed in a direction to close the hole by the pressure of the liquid. When the valve body of the first one-way valve moves away from the hole against the urging force of the urging means, the force for closing the hole of the urging force of the urging means is small, so the The door can be moved with a stable force (steady torque).

When the rotation of the shaft is stopped, the valve body of the first one-way valve quickly closes the hole by the urging force of the urging means.
On the other hand, when the liquid flows from the second chamber toward the first chamber, the valve body of the second one-way valve of the second conduit is pushed in a direction away from the hole due to the pressure of the liquid. Further, the valve body of the first one-way valve of the first pipe line is pushed in the direction of closing the hole by the pressure of the liquid. When the valve body of the second one-way valve moves away from the hole against the urging force of the urging means, the urging force of the urging means becomes small.

When the rotation of the shaft stops, the valve body of the second one-way valve quickly closes the hole by the urging force of the urging means.
JP 2008-008309 A (FIG. 13)

  In the one-way valve described in Patent Document 1, consideration is not given to the setting of the flow resistance of the fluid at the hole, the valve body, and the outlet. In other words, when the difference between the cross-sectional area of the hole and the cross-sectional area of the pipe downstream from the hole is large, if the valve body is released from the state in which the hole is closed, the urging force is applied in the direction to close the hole. In addition to an increase in the moving speed of the valve body due to a sudden decrease in the urging force of the means, the flow rate of the liquid rapidly increases due to the difference in the cross-sectional area. Pressure fluctuations occur and shock waves are generated.

Due to this shock wave, abnormal noise is generated when the door is actuated, or the shock wave is transmitted to the hand when the door is actuated, resulting in a problem that the operational texture is lowered.
An object of the present invention is to provide a door check device capable of suppressing abnormal noise and unpleasant vibration during door operation.

  According to a first aspect of the present invention, there is provided a casing filled with a liquid, a shaft disposed in the casing and rotatably supported by the casing, and provided on a peripheral surface of the shaft. A flap divided into a chamber and a second chamber; a first conduit and a second conduit provided in the flap such that one opening faces the first chamber and the other opening faces the second chamber; A valve body provided in the first conduit, a hole provided in the first conduit and upstream of the valve body and closed when the valve body is closed, the valve body A first unidirectional valve having an outlet provided downstream of the valve body, wherein the valve body includes the hole portion. When it is formed so as to increase the force to close the hole as it approaches In addition, an urging force is always exerted on the valve body in the direction of closing the hole, allowing a liquid to flow from the first chamber to the second chamber, and from the second chamber to the first chamber. A first one-way valve for blocking the flow of liquid; a valve body provided in the second pipe; and a second valve in the second pipe, provided upstream from the valve body, and closing the valve body. A second one-way valve having a hole portion that is closed by this, a biasing means that biases the valve body in a direction to close the hole portion, and an outlet provided downstream from the valve body, The biasing means is formed such that a force for closing the hole is increased as the valve body approaches the hole, and a biasing force is always exerted on the valve body in a direction for closing the hole. Allowing the flow of liquid from the second chamber to the first chamber, and allowing liquid to flow from the first chamber to the second chamber. A second one-way valve for preventing this, and in the first one-way valve and the second one-way valve, the flow resistance of the liquid in the hole is RI, and the flow of the liquid in the valve body When the resistance is RV and the flow resistance of the liquid at the outlet located downstream from the valve body is RO, RI <RV <RO.

  When the shaft is rotated, the liquid flows through the first pipe line and the second pipe line. When the liquid flows from the first chamber toward the second chamber, the valve body of the first one-way valve of the first pipe is pushed away from the hole by the pressure of the liquid. At this time, since the force for closing the hole is large, a large force (peak torque) is required to move the door. Further, the valve body of the second one-way valve of the second pipe line is pushed in a direction to close the hole by the pressure of the liquid. When the valve body of the first one-way valve moves away from the hole against the urging force of the urging means, the urging force of the urging means becomes small, so a small and stable force (steady torque) ) To move the door.

When the rotation of the shaft is stopped, the valve body of the first one-way valve quickly closes the hole by the urging force of the urging means.
On the other hand, when the liquid flows from the second chamber toward the first chamber, the valve body of the second one-way valve of the second conduit is pushed in a direction away from the hole due to the pressure of the liquid. Further, the valve body of the first one-way valve of the first pipe line is pushed in the direction of closing the hole by the pressure of the liquid. When the valve body of the second one-way valve moves away from the hole against the urging force of the urging means, the urging force of the urging means becomes small.

When the rotation of the shaft stops, the valve body of the second one-way valve quickly closes the hole by the urging force of the urging means.
In the invention according to claim 2, a hole for allowing the liquid to pass through is provided in the valve body and the outlet, the opening area of the hole of the valve body is SV, and the opening area of the hole at the outlet is SO. In this case, the door check device according to claim 1, wherein SV> SO.

  In the invention according to claim 3, the urging means of the first one-way valve and the urging means of the second one-way valve are provided on either the pipe line side or the valve body side, The other side of the pipe line side and the valve body side intersects the moving direction of the valve body, and when the urging force of the urging means is applied, the hole is blocked in the valve body. A surface that generates a component force in a direction is formed, and the surface is formed such that a component force in a direction to close the hole portion increases as the valve body approaches the hole portion, 3. The door check according to claim 1, wherein the door is always pressed from a direction intersecting with the moving direction of the valve body, and an urging force is always applied to the valve body in a direction of closing the hole. Device.

  The invention according to claim 4 is characterized in that the valve body of the first one-way valve and the valve body of the second one-way valve move in the pipe line while sliding on the inner surface of the pipe line. It is a door check apparatus in any one of Claims 1 thru | or 3.

  According to the first to fourth aspects of the present invention, when RI <RO, the movement of the valve body is suppressed when the one-way valve is opened. Therefore, the speed at which the valve body separates from the hole portion is slowed, no sudden pressure fluctuation is generated in the liquid, and no shock wave is generated. For this reason, abnormal noise and unpleasant vibration do not occur when the door is operated.

  Further, by setting RV <RO, the change in resistance applied to the valve body can be suppressed at the time of transition from peak torque to steady torque, so that the operational texture can be improved by suppressing fluctuations in the force for moving the door.

According to the invention which concerns on Claim 3, since an urging | biasing means exerts urging | biasing force from the direction which cross | intersects with respect to the moving direction of a valve body, it is easy to reduce in size in the moving direction of a valve body.
According to the invention of claim 4, the valve body of the first one-way valve and the valve body of the second one-way valve move in the pipe line while sliding on the inner surface of the pipe line. Even if the distance between the hole and the valve body varies, the gap between the outer surface of the valve body and the inner surface of the pipe does not change, so that RV hardly changes.

  First, the structure for mounting the door check device of this embodiment on a vehicle will be described with reference to FIGS. As shown in FIG. 8, the door 300 is rotatably attached to the body 305 using an upper hinge 301 and a lower hinge 303. A door check device 351 is provided on the upper hinge 301 side.

  As shown in FIG. 9, the upper hinge 301 includes a hinge female 311 whose base end is attached to the body 305, a hinge male 313 whose base end is attached to the door 300, and a distal end side of the hinge female 311. Is fitted into and fixed to a hinge pin hole 311 a provided in the hinge, and is loosely fitted into a hinge pin hole 313 a provided on the distal end side of the hinge mail 313 so as to be integrated with the hinge female 311 relative to the hinge mail 313. And a hinge pin 315 that rotates. A door check device 351 is attached to the lower portion of the hinge mail 313 on the door 300 side, and the shaft 355 of the door check device 351 is coupled to the hinge pin 315 so that the hinge pin 315 and the shaft 355 rotate together. Yes.

Next, the door check device 351 shown in FIGS. 8 and 9 will be described with reference to FIGS. 1 is a cross-sectional view taken along a cutting line II in FIG. 8, and FIG. 2 is a cross-sectional view taken along a cutting line II-II in FIG.
In these drawings, the casing 353 of the door check device 351 is filled with a liquid such as silicone oil. In the casing 353, a shaft 355 that is rotatably supported by a first part (upper part) 353a and a second part (lower part) 353b facing each other of the casing 353 is disposed.

A flap 361 that divides the inside of the casing 353 into a first chamber 357 and a second chamber 359 is provided on the peripheral surface of the shaft 355.
The flap 361 is formed with a first conduit 371 and a second conduit 373 so that one opening faces the first chamber 357 and the other opening faces the second chamber 359.

  A first one-way valve 381 and a second one-way valve 383 are provided in the first pipe line 371 and the second pipe line 373. The first one-way valve 381 is normally closed, and is opened when the liquid pressure in the first chamber 357 increases, allowing the flow of liquid from the first chamber 357 to the second chamber 359, and the second one. Even if the fluid pressure in the chamber 359 increases, the valve maintains the closed state. Further, the second one-way valve 383 is normally closed, and when the liquid pressure in the second chamber 359 increases, the second one-way valve 383 opens and permits the flow of liquid from the second chamber 359 to the first chamber 357. Even if the fluid pressure in the first chamber 357 increases, the valve maintains the closed state.

  Here, the first one-way valve 381 and the second one-way valve 383 will be described. Since the first one-way valve 381 and the second one-way valve 383 have the same structure, the first one-way valve 381 will be described with reference to FIGS. 3 and 6 and the second one-way valve 383 will be described. Is omitted.

  As shown in FIG. 3, the first pipe 371 includes a small diameter portion 371 a on the first chamber 357 side and a large diameter portion 371 b on the second chamber 359 side. The large-diameter portion 371b is movably engaged with the large-diameter portion 371b, and an opening (hole portion) 371c formed in the step portion 371d between the small-diameter portion 371a and the large-diameter portion 371b is closed. The valve body 391 in which the first one-way valve 381 is closed, the biasing means 401 for biasing the valve body 391 in a direction to close the opening (hole portion) 371c, and the second chamber 359 of the large-diameter portion 371b are faced. A lid 411 is provided so as to close the opening.

  The valve body 391 has a bottomed cylindrical shape in which a bottom portion 391a is formed on the small diameter portion 371a side and an outer surface is in sliding contact with an inner surface of the large diameter portion 371b. A protrusion 391b that can be fitted to the small diameter portion 371a is formed at the center of the bottom portion 391a. An annular groove 391c is formed on the surface of the bottom 391a facing the step 371d (hereinafter referred to as the outer surface of the bottom 391a). The small diameter portion 371a is brought into contact with the step 371d in the groove 391c. And an O-ring 393 for sealing between the large-diameter portion 371b. Further, a hole 391d through which liquid flows is formed on the outer surface of the bottom portion 391a outside the groove 391c.

  As shown in FIG. 6, the flap 361 is formed with a lid fitting portion 361a into which the lid 411 is fitted. The lid fitting portion 361a has a groove 361b in which a collar portion 411e formed around the lid 411 can be engaged.

  Then, as shown in FIG. 6, the attachment direction of the lid 411 is in a direction (arrow VI direction in FIG. 6) that intersects the direction (arrow X direction in FIG. 6) in which the liquid of the first one-way valve 381 flows. Is set.

  Returning to FIG. 3, a protrusion 411 a is formed on the surface of the lid 411 facing the large-diameter portion 371 b (hereinafter referred to as the inner surface of the lid 411). A first surface 411b that intersects the moving direction of the valve body 391 is formed on the distal end side of the protruding portion 411a, and a proximal end side of the protruding portion 411a intersects the moving direction of the valve body 391. In addition, a second surface 411c is formed which is less inclined with respect to the moving direction of the valve body 391 than the first surface 411b. Furthermore, a hole 411d through which liquid flows is formed in the lid 411. In this embodiment, the opening area of the hole 411d of the lid 411 is narrower than the opening area of the hole 391d of the valve body 391.

  The biasing means 401 has a substantially Ω shape formed by bending a thin plate, and is a valve that presses against a surface of the bottom 391a of the valve body 391 opposite to the surface facing the step portion 371d (hereinafter referred to as the inner surface of the bottom 391a). The body abutting portion 401a and two projecting portion pressing portions 401b that are pressed so as to sandwich the first surface 411b and the second surface 411c of the projecting portion 411a.

  The first surface 411b and the second surface 411c of the protrusion 411a are formed so as to generate a component force in the direction of closing the opening 371c in the valve body 391 via the biasing means 401. Furthermore, since the second surface 411c is inclined differently from the first surface 411b, when the biasing means 401 presses the second surface 411c, the opening 371c is formed compared to when pressing the first surface 411b. The component force in the closing direction is reduced. That is, as the valve element 391 approaches the opening (hole) 371c, the component force in the direction of closing the opening 371c increases.

Here, the operation of the first one-way valve 381 will be described with reference to FIGS.
Normally, as shown in FIG. 3, the protrusion pressing portion 401b of the biasing means 401 presses the first surface 411b of the protrusion 411a, and the valve body 391 closes the opening 371c and is in a valve closed state. .

  When the flap 361 rotates and the hydraulic pressure on the first chamber 357 side increases, the valve element 391 moves away from the opening 371c against the urging force of the urging means 401, and the valve opening shown in FIG. It becomes a state. Then, the protrusion pressing portion 401b of the urging means 401 presses against the second surface 411c of the protrusion 411a, and the component force in the direction of closing the opening 371c is reduced. Retained.

  Further, when the valve body 391 moves in a direction away from the opening 371c, as shown in FIG. 5, the tip of the protrusion pressing portion 401b of the urging means 401 comes into contact with the inner surface of the lid 411 (bottom protruding state). Further movement of the body 391 is prohibited.

  When the rotation of the flap 361 stops and the hydraulic pressure on the first chamber 357 side decreases, the biasing force of the biasing means 401 returns to the state shown in FIG. 3, and the valve body 391 quickly closes the opening 371c. .

  Here, RI represents the flow resistance at the opening (hole) 371c, RV represents the flow resistance at the valve body 391, and RO represents the flow resistance at the hole 411d (an outlet located downstream from the valve body) 411d. In this case, RI <RV <RO in this embodiment.

  Further, RS1 is the component force (resistance) in the direction to close the opening 371c of the urging force of the urging means 401 when the protrusion pressing portion 401b is in contact with the first surface 411b, and the protrusion pressing portion 401b is the first. When the component force (resistance) in the direction to close the opening 371c of the urging force of the urging means 401 when pressed against the second surface 411c is RS2, and the total resistance RALL, the total resistance RALL in FIGS. It becomes as follows.

In the state shown in FIG. 3 (the state in which the protruding portion pressing portion 401b is pressed against the first surface 411b of the protruding portion 411a), there is only the urging force by the urging means 401, so RALL = RS1.
In the state of FIG. 4 (the state in which the protruding portion pressing portion 401b is pressed against the second surface 411c of the protruding portion 411a and not bottomed out to the inner surface of the lid 411), the valve body 391 moves together with the liquid, Since it does not flow through the hole 391d, no flow resistance occurs in the valve body 391, and RALL = RI + RS2 + RO.

The state (bottom-out state) in FIG. 5 is RALL = RI + RV + RS2 + RO.
FIG. 7 shows the torque required to operate the door check device. In FIG. 7, the solid line represents the torque in the present embodiment, and the broken line represents the torque when RV> RO in the apparatus of the present embodiment.
<In case of solid line>
The largest torque is required when the door 300 is rotated and the valve body 391 is moved (state of FIG. 3).

When the valve body 391 starts to move, the urging force by the urging means 401 decreases, and the torque necessary to operate the door check device decreases (state shown in FIG. 4).
Then, when the tip of the protrusion pressing portion 401b of the urging means 401 comes into contact with the inner surface of the lid 411 and the movement of the valve body 391 is prohibited, a torque that overcomes the flow resistance RV at the valve body 391 is required. Therefore, the torque required to operate the door check device increases (the state shown in FIG. 5).
<In case of broken line>
In this example, as shown in FIG. 10, the opening area of the hole 411d of the lid 411 is large and RO≈0, which is close to the conventional example.

The difference from the case of the solid line is after the valve body 391 starts to move.
When the valve body 391 starts to move, RO≈0, so RALL = RI + RS2, and the amount of torque reduction becomes larger than that in this embodiment. Further, when the tip of the protrusion pressing portion 401b of the urging means 401 comes into contact with the inner surface of the lid 411 and the movement of the valve element 391 is prohibited, RO≈0 and RALL = RI + RV + RS2. Therefore, when the transition from FIG. 4 to FIG. 5 is performed, the resistance difference of RV brings about a decrease in operating texture, but since the ratio of RV to RALL is higher than that in the present embodiment, the deterioration in texture appears remarkably.

According to the above configuration, the following effects can be obtained.
(1) By setting RI <RO, when the first one-way valve 381 is opened, the sudden movement of the valve body 391 is suppressed. Accordingly, the speed at which the valve body 391 is separated from the opening (hole) 371c is slowed, no sudden pressure fluctuation is generated in the liquid, and no shock wave is generated. For this reason, abnormal noise and unpleasant vibrations are unlikely to occur during door operation.
(2) Since RV <RO, the torque change when the valve body 391 starts to move is small, and the operation texture is good. That is, when the transition is made from FIG. 4 to FIG. 5, the resistance difference of RV brings about a decrease in operating texture, but in this embodiment, the ratio of RV to RALL is low, so that the texture deterioration does not appear remarkably.
(3) When RI> RV, the force for moving the valve body 391 becomes small, and troubles such as vibration of the valve body 391 occur when the valve body 391 moves, but in the case of this embodiment, RI <RV As a result, the force for moving the valve body 391 is increased, and troubles such as vibration of the valve body 391 when the valve body 391 is moved can be prevented.
(4) The flow resistance (RV) at the valve body 391 varies depending on the value of the gap between the outer surface of the valve body 391 and the large diameter portion 371b of the first pipe line 371. Since the valve body 391 of the present embodiment has a bottomed portion 391a formed on the small diameter portion 371a side and the outer surface is a bottomed cylindrical shape that is in sliding contact with the inner surface of the large diameter portion 371b, the opening (hole portion) 371c, The distance between the outer surface of the valve body 391 and the inner surface of the large-diameter portion 371b of the first pipe line 371 does not change even if the distance varies, so that the RV hardly changes.

Needless to say, these effects can be applied to the second one-way valve 383 having the same structure as the first one-way valve 381.
The first surface 411b and the second surface 411c are provided on the lid 411, that is, the first conduit 371 and the second conduit 373 side, but are provided on the valve member 391 side, and the valve member of the biasing means 401 is provided. The contact portion 401a may be brought into contact with the lid 411.

Further, although the portion of the valve body 391 through which the liquid flows is the hole 391d, a gap may be provided between the outer surface of the valve body 391 and the inner surface of the large diameter portion 371b, and the liquid may flow through this gap.
Further, the portion of the lid 411 through which the liquid flows is the hole 411d. However, a gap may be provided between the outer surface of the lid 411 and the inner surface of the large-diameter portion 371b, and the liquid may flow through this gap.

  Further, when the urging force of the urging means is applied, a description will be given of two surfaces including a first surface 411b and a second surface 411c as surfaces that generate a component force in a direction of closing the hole portion in the valve body. Although performed, the curved surface may be a continuous curved surface.

It is sectional drawing in the cutting line II of FIG. It is sectional drawing in the cutting line II-II of FIG. FIG. 3 is an enlarged view of the first one-way valve of FIG. 2. It is a figure explaining the action | operation of the 1st one way valve | bulb of FIG. It is a figure explaining the action | operation of the 1st one way valve | bulb of FIG. It is a figure explaining attachment of the lid | cover of FIG. It is a figure explaining torque required in order to operate a door check device. It is a disassembled perspective view around the door in which the door check apparatus was provided. It is the figure which expanded the upper hinge part of FIG. In FIG. 7, it is a figure explaining the one-way valve | bulb of the door check apparatus in the case of a broken line.

Explanation of symbols

381 First one-way valve 383 Second one-way valve 371c Opening (hole)
391 Valve body 411d Hole (exit)

Claims (4)

A casing filled with liquid;
A shaft disposed within the casing and rotatably supported by the casing;
A flap provided on a peripheral surface of the shaft and dividing the inside of the casing into a first chamber and a second chamber;
A first conduit and a second conduit provided in the flap so that one opening faces the first chamber and the other opening faces the second chamber;
A valve body provided in the first conduit, a hole provided in the first conduit upstream of the valve body and closed when the valve body is closed; and the valve body An urging means for urging the hole in a closing direction, and a first one-way valve having an outlet provided downstream from the valve body, wherein the urging means has the valve body at the hole. As the force approaches, the force for closing the hole is increased, and the urging force is always exerted on the valve body in the direction for closing the hole, so that the liquid from the first chamber to the second chamber is applied. A first one-way valve that permits the flow of liquid and blocks the flow of liquid from the second chamber to the first chamber;
A valve body provided in the second pipe line, a hole part provided in the second pipe line, upstream of the valve body, and closed when the valve body is closed; An urging means for urging the hole in a closing direction, and a second one-way valve having an outlet provided downstream from the valve body, wherein the urging means has the valve body at the hole. As the force approaches, the force for closing the hole is increased, and the urging force is always applied to the valve body in the direction for closing the hole, so that the liquid from the second chamber to the first chamber A second one-way valve that allows the flow of liquid and blocks the flow of liquid from the first chamber to the second chamber;
Consists of
Furthermore, in the first one-way valve and the second one-way valve,
RI, the flow resistance of the liquid in the hole,
The flow resistance of the liquid at the valve body is RV,
RO, the flow resistance of the liquid at the outlet located downstream from the valve body,
If
RI <RV <RO
The door check device characterized by being. Providing a hole for allowing the liquid to pass through the valve body and the outlet;
The opening area of the hole of the valve element is SV,
When the opening area of the hole at the outlet is SO,
SV> SO
The door check device according to claim 1, wherein:   The urging means for the first one-way valve and the urging means for the second one-way valve are provided on either the pipe line side or the valve body side, and are provided on the pipe line side or the valve body side. One of the surfaces intersects with the moving direction of the valve body, and when the urging force of the urging means is applied, a surface in which a component force in the direction of closing the hole portion is generated in the valve body is generated. And the surface is formed such that a component force in a direction to close the hole portion increases as the valve body approaches the hole portion, and the biasing means moves the surface in the moving direction of the valve body. 3. The door check device according to claim 1, wherein the door check device is always pressed from a direction intersecting with the valve body and constantly exerts an urging force in a direction of closing the hole portion with respect to the valve body.   4. The valve body of the first one-way valve and the valve body of the second one-way valve move in the pipe line while being in sliding contact with the inner surface of the pipe line. The door check device according to.

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