JP5313648B2 - Door check device - Google Patents

Description

  The present invention relates to a door check device using a one-way valve.

Patent Document 1 below describes a door check device in which a valve body is held with a large force at a closed position and the force for holding the valve body decreases when the valve body moves in an opening direction.
The door check device includes a case filled with a liquid, a shaft disposed in the case, rotatably supported by the case, and rotated around opening and closing of the door, and provided on a peripheral surface of the shaft. A flap that divides the interior into a first chamber and a second chamber; a first conduit provided in the flap such that one opening faces the first chamber and the other opening faces the second chamber; Two conduits, a valve provided in the first conduit, a hole provided in the first conduit upstream of the valve, and closed when the valve is closed, the valve 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 pipe provided upstream of the valve body and closed by closing the valve body A second unidirectional valve having an outlet provided downstream of the valve body, and a biasing means for biasing the valve body in a direction to close the hole. The valve body is formed so that a force for closing the hole portion increases as the valve body approaches the hole portion, and a biasing force is always exerted on the valve body in a direction to close the hole portion, Allow the flow of liquid from the chamber to the first chamber and block the flow of liquid from the first chamber to the second chamber And a second one-way valve that.

  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 door check device having the above-described configuration, when the opening and closing of the door is stopped, that is, when the rotation of the shaft is stopped, the valve body of the first one-way valve or the second one-way valve is quickly moved by the urging force of the urging means. The door will stop in place.

On the other hand, when the door is fully closed, a force in the opening direction acts on the door due to the elastic repulsive force of the weather strip. Therefore, there is a problem that the door closing property is poor when fully closed.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a door check device having good door closing performance when fully closed.

The invention according to claim 1 includes a case filled with a liquid, a shaft that is disposed in the case, is rotatably supported by the case, and rotates relative to the case as the door is opened and closed. A flap is provided on the peripheral surface of the shaft and divides the inside of the case into a first chamber and a second chamber, and one opening faces the first chamber and the other opening faces the second chamber. A first one-way valve, a second one-way valve, and a first one-way valve provided in the first pipe-line, allowing liquid flow from the first chamber to the second chamber, A first one-way valve for blocking the flow of liquid from two chambers to the first chamber, and a second one-way valve provided in the second conduit, the second chamber to the first chamber A second one-way bar that allows a liquid flow of the first chamber and prevents a liquid flow from the first chamber to the second chamber. In a door check device consists of a blanking, and fully closed the door, the force application means with providing a first biasing force of the door closing direction to the shaft provided, the biasing force applying means, said shaft, said case A cam provided with one of them, a cam having a cam surface, a follower provided movably on the other of the shaft and the case and capable of contacting the cam surface of the cam; and a cam surface of the cam; An elastic body that presses the driven body;
It is the door check apparatus characterized by these.

When the shaft rotates relative to the case, the liquid flows through the first and second pipelines.
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. 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. Then, the valve body of the first one-way valve moves in a direction away from the hole against the urging force of the urging means. When the rotation of the door stops, the valve element of the first one-way valve closes the hole quickly by the component force in the direction closing the hole of 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 component force in the direction of closing the hole of the urging force of the urging means is reduced. When the rotation of the door stops, the valve body of the second one-way valve quickly closes the hole by the component force in the direction to close the hole of the biasing force of the biasing means.

The biasing force applying means applies a first biasing force in the door closing direction to the shaft when the door is fully closed.
The invention according to claim 2 is the door check device according to claim 1, wherein the biasing force applying means applies a second biasing force in the door closing direction to the shaft when the door is fully opened.

  The invention according to claim 3 is characterized in that the urging force applying means always applies a third urging force in the door rotation direction to the shaft between the time when the door is fully opened and the time when the door is fully closed. The door check device according to claim 1 or 2.

The invention according to claim 4 is the door check device according to claim 3, wherein the third urging force is in a door closing direction .

According to the first to fourth aspects of the present invention, when the door is fully closed, the urging force applying means for applying the first urging force in the door closing direction to the shaft is provided. Good closing performance.
The urging force applying means is provided on one of the shaft and the case, and is provided movably on the other of the shaft and the case. The cam surface of the cam The shape of the cam surface of the cam and the elastic repulsive force of the elastic body are appropriately selected by the follower that can come into contact with the cam, the cam surface of the cam, and the elastic body that presses the follower Accordingly, the magnitudes of the first biasing force, the second biasing force, and the third biasing force, and the timing at which the first biasing force, the second biasing force, and the third biasing force are generated can be freely set.

  According to the invention according to claim 2, when the biasing force applying means gives the second biasing force in the door closing direction to the shaft when the door is fully opened, the door is vigorously opened and fully opened. The force acting on the fully open stopper provided on the hinge or the like is reduced, and the durability is improved.

  According to the third and fourth aspects of the invention, the urging force applying means applies a third urging force in the door rotation direction to the shaft between the time when the door is fully opened and the time when the door is fully closed. Thus, the feeling of fluttering when the door is held in a state between the fully open state and the fully closed state is suppressed.

  First, the structure for attaching the door check device of this embodiment to a vehicle will be described with reference to FIGS. As shown in FIG. 3, 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. 4, 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 side of the hinge mail 313 on the door 300 side, and the shaft 5 of the door check device 351 is coupled to the hinge pin 315 so that the hinge pin 315 and the shaft 5 rotate integrally. Yes.

Further, the door check device 351 is provided with an urging force applying means 401.
Next, a schematic configuration of the door check device 351 excluding the biasing force applying unit 401 will be described with reference to FIGS. 5 and 6. FIG. 5 is an exploded perspective view of the door check device 351, and FIG. 6 is a cross-sectional view taken along line AA when the door check device shown in FIG. 5 is assembled.

As shown in these drawings, the door check device 351 includes a case 3 and a shaft 5.
The case 3 is a molded product of fiber reinforced plastic, and includes a bottomed cylindrical case main body 1 having an open surface 1 a and a lid 11 that covers the open surface 1 a of the case main body 1. In this embodiment, a seal ring (not shown) is disposed between the case body 1 and the lid 11 so that the case body 1 and the lid 11 are sealed.

  On the inner bottom surface of the case main body 1, one end side of the shaft 5 is fitted, and a concave portion that rotatably supports the shaft 5 is formed. The case body 1 is filled with a viscous fluid (for example, oil). A flap 9 is attached to the peripheral surface of the shaft 5 in the case body 1. The inside of the case body 1 is divided into a first chamber 2 and a second chamber 3 by the flap 9.

  A lid 11 is provided so as to cover the open surface 1a of the case body 1. The lid 11 is also a molded product of fiber reinforced plastic, and is provided with a hole 13 through which the other end of the shaft 5 is inserted and rotatably supported. The other end side of the shaft 5 projects to the outside of the case 3 through the hole 13 of the lid 11 and is coupled to the hinge pin 315 described above.

Next, the flap 9 will be described with reference to FIG. FIG. 7 is an exploded perspective view of the flap 9.
The flap 9 has one opening 4a (see FIG. 8) in the first chamber 2, the other opening 4b in the second chamber 3, and one opening 5a in the second chamber 3. A second duct 5 is provided such that the other opening (not shown) faces the first chamber 2. In this embodiment, in the first pipeline 4 and the second pipeline 5, the opening area of one opening 4a, 5a is set to be narrower than the opening area of the other opening 4b.

  The first conduit 4 includes a first one-way valve 7 that allows a liquid flow from the first chamber 2 to the second chamber 3 and prevents a liquid flow from the second chamber 3 to the first chamber 2. Is provided. Further, the second one-way valve that allows the liquid flow from the second chamber 3 to the first chamber 2 and prevents the liquid flow from the first chamber 2 to the second chamber 3 in the second pipe 5. (Not shown) is provided.

  Next, the one-way valve will be described with reference to FIGS. 7, 8, and 12. Since the first one-way valve 7 and the second one-way valve in the present embodiment have the same configuration, only the first one-way valve will be described, and the description of the second one-way valve will be omitted. FIG. 8 is a configuration diagram for explaining the first one-way valve 7, and FIG. 12 is a diagram for explaining a protrusion formed on the lid.

The first pipe line 4 is provided with a rectangular tube-like pipe line 71 through which liquid flows.
A valve body 72 that moves forward and backward in the pipeline 71 is provided inside the pipeline 71. The valve body 72 has a bottomed cylindrical shape in which one side facing the opening 4a is a bottom 72b and the other side is an open surface, and a protrusion 72a that can enter the opening 4a is formed on the bottom 72b. ing. In addition, a hole 72c facing the peripheral edge of the opening 4a is formed in the bottom 72b of the valve body 72.

On the upstream side of the valve body 72, a hole portion that is closed when the valve body 72 is closed is provided. In this embodiment, the opening 4a is a hole.
An annular seal ring 76 is provided at the base of the protrusion 72 a of the valve body 72. When the protrusion 72a of the valve body 72 enters the opening 4a and the valve body 72 blocks the opening 4a, the seal ring 76 contacts the edge of the opening 4a and improves the sealing performance of the valve body 72. Is.

  A lid 73 is provided on the downstream side of the valve body 72 so as to block the open surface of the pipe 71. The lid 73 is formed with a hole 73 a that connects the outside of the lid 73 and the inside of the pipe 71. In this embodiment, the sectional area of the hole 73a is set smaller than the sectional area of the opening 4a.

  The first one-way valve 7 is provided with an urging means for urging the valve body 72 so that the force for closing the opening (hole) 4a increases as the valve body 72 approaches the opening (hole) 4a. . The biasing means of the present embodiment is formed continuously on a plate spring 75 provided between the valve body 72 and the lid 73 and a surface of the lid 73 facing the valve body 72, and has different inclination angles. The projection 73b has a first surface 73c and a second surface 73d. The leaf spring 75 has an inverted U-shape, and one end side abuts on the surface of the bottom 72b of the valve body 72 opposite to the surface provided with the protrusion 72a, and the other end side protrudes. One of the first surface 73c and the second surface 73d is always pressed across the 73b, and the urging force is always exerted on the valve body 72 in the direction of closing the opening (hole) 4a. In addition, the inclination of the protrusion 73b with respect to the direction perpendicular to the direction in which the liquid flows on the first surface 73c is formed more gently than the inclination of the second surface 73d. Therefore, the urging force exerted on the valve body 72 via the leaf spring 75 is smaller on the second surface 73d than on the first surface 73c. That is, as the valve body 72 approaches the opening (hole) 4a, the force for closing the opening (hole) 4a increases.

In this embodiment, the protrusion 73 b having the first surface 73 c and the second surface 73 d is formed on the lid 73. However, the protrusion is formed on the valve body 72, and the leaf spring 75 is connected to the protrusion 73 and the lid 73. You may arrange | position between.
Further, as shown in FIG. 8, the lid 73 is formed with a stopper portion 73 e that abuts the valve body 72 and prohibits the valve body 72 from moving downstream.

  Here, the operation of the door check device configured as described above will be described. When the shaft 5 is rotated, the liquid flows through the first conduit 4 and the second conduit 5. When the liquid flows from the first chamber 2 toward the second chamber 3, the valve body 72 of the first one-way valve 7 of the first conduit 4 is pushed away from the opening (hole) 4a by the pressure of the liquid. It is. At this time, since the force for closing the opening (hole) 4a 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 5 is pushed in a direction to close the hole by the pressure of the liquid. When the valve element 72 of the first one-way valve 7 moves away from the opening (hole) 4a against the urging force of the urging means, the leaf spring 75 is moved from the first surface 73c to the second surface 73d. Since the force for closing the opening (hole) 4a of the urging force of the urging means is reduced, the door can be moved with a small and stable force (steady torque).

When the rotation of the shaft 5 is stopped, the valve body 72 of the first one-way valve 7 quickly closes the hole by the urging force of the urging means.
On the other hand, when the liquid flows from the second chamber 3 toward the first chamber 2, the valve body of the second one-way valve of the second conduit 5 is pushed away from the hole by the pressure of the liquid. Further, the valve body 72 of the first one-way valve 7 in the first pipe line 4 is pushed in a direction to close 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 leaf spring moves from the first surface to the second surface, and the urging means is urged. The power becomes smaller.

Then, when the rotation of the shaft 5 stops, the valve body of the second one-way valve closes the hole portion quickly by the urging force of the urging means.
Here, the operation of the one-way valve (first one-way valve 7) will be described with reference to FIGS.

(1) As shown in FIG. 8, when the valve body 72 closes the opening (hole) 4a, the flow path FR is in a closed state.
(2) As shown in FIG. 9, when the valve body 72 is pushed away from the opening (hole) 4a by the pressure of the liquid, the valve body 72 is slightly separated from the opening (hole) 4a. At this time, the leaf spring 75 still presses the first surface 73c of the protrusion 73b.

In such a state, the flow path FR is fully opened.
(3) As shown in FIG. 10, when the valve body 72 is further pushed by the pressure of the liquid and the leaf spring 75 moves to the second surface 73d of the protrusion 73b, the force for closing the valve body 72 is reduced.

(4) As shown in FIG. 11, the valve body 72 comes into contact with the stopper portion 73e of the lid 73, and further movement of the valve body 72 downstream is prohibited.
Next, the urging force applying means 401 will be described with reference to FIGS. FIG. 1 is a perspective view for explaining the biasing force applying means 401, and FIG. 2 is a plan view of FIG.

  As shown in FIG. 1, a cam 405 having a cam surface 405 a is rotatably provided on the lid 11 of the case 3 using a pin 403. A pin 407 is provided on the surface of the cam 405 facing the case 3 on the rotating end side.

  A lever 409 as a follower that rotates integrally with the shaft 5 is fixed to the shaft 5. A pin 411 that can contact the cam surface 405 a of the cam 405 is provided on the rotating end side of the lever 409.

  Then, the outer end portion of the spiral spring 413 as an elastic body whose inner end portion is locked to the case 3 is locked to the pin 407 of the cam 405 so that the cam surface 405a and the pin 411 of the lever 409 are pressed against each other. The cam 405 is biased in the direction of arrow C.

As shown in FIG. 2, the cam surface 405a includes a first step portion 405b, a second step portion 405c, and an inclined portion 405d between the first step portion 405b and the second step portion 405c.
When the door 300 is in the fully closed state, the pin 411 is pressed against the first step portion 405b of the cam surface 405a, and the shaft 5 is given a first urging force in the door closing direction (the arrow D direction in the figure). .

When the door 300 is in the fully open state, the pin 411 is pressed against the second step portion 405c of the cam surface 405a, and the shaft 5 is given a second urging force in the door closing direction.
Further, when the door 300 is fully opened and when the door 300 is fully closed, that is, when the pin 411 is pressed against the inclined portion 405d, the door rotates in the shaft 5 (in this embodiment, the door is closed). The inclined portion 405d is set so as to apply the third urging force.

According to such a configuration, the following effects can be obtained.
(1) When the door 300 is fully closed, the urging force applying means 401 that applies the first urging force in the door closing direction to the shaft 5 is provided, so that the door 300 can be closed when the door 300 is fully closed.

 (2) The urging force applying means 401 is provided on the hinge or the like when the door 300 is fully opened by applying a second urging force in the door closing direction to the shaft 5 when the door 300 is fully opened. The force acting on the fully open stopper is reduced and durability is improved.

 (3) In the above embodiment, when the urging force applying means 401 is not provided, even when the door 300 is held, the door 300 feels fluttering when the seal ring 76 is elastically deformed.

  However, in this embodiment, the biasing force applying means 401 always applies the third biasing force in the door rotation direction to the shaft 5 between the time when the door 300 is fully opened and the time when the door 300 is fully closed. Fluctuation when the door 300 is held in a state between the fully closed state is suppressed.

(4) Since the third urging force is in the door closing direction, the feeling of fluttering when the door 300 is held is suppressed between the fully open state and the fully closed state.
(5) By appropriately selecting the shape of the cam surface 405a of the cam 405 and the elastic repulsion force of the spiral spring 413, the magnitude of the first biasing force, the second biasing force, the third biasing force, the first biasing force, The timing at which the second biasing force and the third biasing force are generated can be freely set.

  The urging force applying means is not limited to the above embodiment. For example, in the above-described embodiment, the cam is provided on the case 3 side and the follower is provided on the shaft 5 side. Conversely, the follower is provided on the case 3 side and the cam is provided on the shaft 5 side.

An example will be described with reference to FIG. A cam 455 having a cam surface 455 a is provided on the shaft 5 so as to rotate integrally with the shaft 5.
In the case 3, the base end side of a leaf spring 457 as an elastic body is fixed. The leaf spring 457 extends in the direction of the cam surface 455a of the cam 455, and a roller 459 as a follower is provided on the tip side. The roller 459 is pressed against the cam surface 455a of the cam 455 by the urging force of the leaf spring 457.

  Even in such a configuration, by providing the cam step 455a with the first step portion, the second step portion, and the inclined surface, when the door 300 is fully closed, the shaft 5 is given a first biasing force in the door closing direction, When the door 300 is fully opened, a second urging force in the door closing direction is applied to the shaft 5, or a third urging force in the door closing direction is applied to the shaft 5 between the door 300 being fully opened and the door 300 being fully closed. Can be given.

  Further, in order to save space, the configuration shown in FIGS. 14 to 15 may be used. In FIG. 14, a cam 555 having a cam surface 555 a is provided on the shaft 5 so as to rotate integrally with the shaft 5. The cam surface 555 a is provided so as to face the shaft 5.

  The case 3 is provided with a plunger 457 as a follower. As shown in FIG. 15, the plunger 457 is pressed against the cam surface 555a by a spring 459 as an elastic body.

  Even in such a configuration, by providing the cam surface 555a with the first step portion, the second step portion, and the inclined surface, when the door 300 is fully closed, the shaft 5 is given a first biasing force in the door closing direction, When the door 300 is fully opened, a second urging force in the door closing direction is applied to the shaft 5, or a third urging force in the door closing direction is applied to the shaft 5 between the door 300 being fully opened and the door 300 being fully closed. Can be given.

  Furthermore, providing the cam surface 555a so as to face the shaft 5 saves space compared to the configuration of FIG.

It is a figure explaining the urging | biasing force provision means of FIG. It is a top view of FIG. It is a disassembled perspective view around the door in which the door check apparatus was provided. FIG. 4 is an enlarged view of an upper hinge portion in FIG. 3. It is a disassembled perspective view of a door check apparatus. It is sectional drawing in cutting line AA when the door check apparatus shown in FIG. 5 is assembled. FIG. 6 is an exploded perspective view of the flap of FIG. 5. It is a block diagram explaining a 1st one way valve | bulb. 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 the action | operation of the 1st one way valve | bulb of FIG. It is a figure explaining the protrusion formed in the lid | cover. It is a figure explaining the other structure of an urging | biasing force provision means. It is a figure explaining the other structure of an urging | biasing force provision means. It is a figure explaining the plunger of FIG.

Explanation of symbols

3 Case 5 Shaft 401 Energizing force applying means

Claims (4)

A case filled with liquid;
A shaft that is disposed within the case, is rotatably supported by the case, and rotates relative to the case as the door is opened and closed;
A flap that is provided on a peripheral surface of the shaft and divides the inside of the case into a first chamber and a second chamber;
A first conduit and a second conduit provided so that one opening faces the first chamber and the other opening faces the second chamber;
A first one-way valve provided in the first conduit, allowing a liquid flow from the first chamber to the second chamber, and flowing a liquid from the second chamber to the first chamber. A first one-way valve for preventing
A second one-way valve provided in the second conduit, allowing liquid flow from the second chamber to the first chamber, and flowing liquid from the first chamber to the second chamber; A second one-way valve to prevent
In the door check device consisting of
When the door is fully closed, an urging force applying means for applying a first urging force in the door closing direction to the shaft is provided ,
The biasing force applying means is
A cam provided on one of the shaft and the case and having a cam surface;
A follower that is movably provided on the other of the shaft and the case and is capable of contacting the cam surface of the cam;
An elastic body that presses the cam surface of the cam and the driven body;
Door check device characterized by comprising at. The biasing force applying means is
The door check device according to claim 1, wherein a second urging force in a door closing direction is applied to the shaft when the door is fully opened. The biasing force applying means is
3. The door check device according to claim 1, wherein a third urging force in the door rotation direction is always applied to the shaft between the time when the door is fully opened and the time when the door is fully closed. The door check device according to claim 3, wherein the third urging force is a door closing direction .

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