JP2007321961A - Pump, door check device and damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump with excellent sealing performance, a door check device and a damper. <P>SOLUTION: The pump 51 is provided with packing 71 formed by an elastic material comprising a flap seal 73 brought into press contact with an inner wall surface of a casing 60; an annular first shaft seal 75 connected to one end side of the flap seal 73, arranged on a peripheral surface of a shaft 69, and brought into press contact with a first inner wall surface of the casing 60; an annular second shaft seal 77 connected to the other end side of the flap seal 73, arranged on the peripheral surface of the shaft 69, and brought into press contact with a second inner wall surface of the casing 60; and a third shaft seal 79 having an end connected to the first shaft seal 75, the other end connected to the second shaft seal 77, and an intermediate part arranged on the peripheral surface of the shaft 69 along the axial direction of the shaft 69, and brought into press contact with the inner wall surface of the casing 60. A groove to which the packing 71 is fitted is formed on a flap 67 and the shaft 69. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pump, a door check device, and a damper.

A casing filled with a liquid, a shaft disposed in the casing and rotatably supported by the first and second parts facing each other; and provided on a peripheral surface of the shaft; A flap divided into a first chamber and a second chamber; a first liquid discharge port provided on the first chamber side of the casing; and a second liquid discharge port provided on the second chamber side of the casing. A pump that discharges liquid from the first liquid discharge port or the second liquid discharge port in accordance with the rotation direction of the shaft is known (see, for example, Patent Document 1).
Japanese Patent Application Laid-Open No. 2004-286128 (FIGS. 10, 11, and 14)

  However, in the conventional pump, the sealing between the inner wall surface of the casing and the shaft and the flap is performed by a plurality of sealing members, and a gap is generated between the sealing members, resulting in poor sealing performance. There is. In particular, when a pump having such a configuration is used in a door check device or a damper, there is a problem that the amount of liquid leakage due to a seal failure in the pump varies greatly, and the performance of the door check device or the damper varies.

  The present invention has been made in view of the above problems, and an object thereof is to provide a pump, a door check device, and a damper that have good sealing properties.

  The invention according to claim 1 is a casing filled with a liquid, a shaft disposed in the casing and rotatably supported by the first and second parts facing each other, and a peripheral surface of the shaft A flap that divides the casing into a first chamber and a second chamber, a first liquid discharge port provided on the first chamber side of the casing, and a second chamber provided on the second chamber side of the casing. A pump for discharging liquid from the first liquid discharge port or the second liquid discharge port in accordance with the rotation direction of the shaft, wherein the first chamber of the flap, the first A flap seal portion that is provided along a surface that faces the inner wall surface of the casing, on a surface other than the surface that faces the two chambers, and on one end side of the flap seal portion. Connected and before A circumferential surface of the shaft, provided in the circumferential direction of the shaft, connected to the annular first shaft seal portion that presses against the inner wall surface of the first portion of the casing, and the other end side of the flap seal portion; An annular second shaft seal portion that is provided in the circumferential direction of the shaft at the circumferential surface of the shaft and presses against an inner wall surface of the second portion of the casing, and one end portion is connected to the first shaft seal portion, A third shaft seal portion that is connected to the second shaft seal portion, the intermediate portion is provided along the axial direction of the shaft at the circumferential surface of the shaft, and presses against the inner wall surface of the casing; The pump is characterized in that a packing made of an elastic material is provided, and a groove for fitting the packing is formed in the flap and the shaft.

  When the shaft rotates in the direction in which the volume of the first chamber decreases, the liquid is discharged from the first liquid discharge port. When the shaft rotates in the direction in which the volume of the second chamber decreases, the liquid is discharged from the second liquid discharge port.

  According to a second aspect of the present invention, the shaft has a surface flush with a surface on which one end of the flap seal portion of the flap is provided on the peripheral surface of the shaft on the first portion side of the casing, and the shaft A first flange portion having a diameter larger than the diameter of the first flange portion is formed, and the surface of the shaft on the second portion side of the casing is flush with the surface on which the other end side of the flap seal portion of the flap is provided. A second collar portion having the same diameter as the first collar portion is formed, and an axial protrusion is formed from the first collar portion to the second collar portion along the axial direction of the shaft. The axial protrusion extends flush with the circumferential surface of the first collar and the circumferential surface of the second collar, and the first shaft seal of the packing is provided on the first collar. A second shaft seal portion of the packing is provided on the second collar portion; The third shaft seal part of the packing in the axially projecting portion is a pump according to claim 1, wherein the provided.

  According to a third aspect of the present invention, the surface of the first collar portion facing the first portion of the casing extends toward the first portion, is coaxial with the first collar portion, and is arranged in the first collar portion. A cylindrical first step portion having a diameter smaller than that of the shaft and larger than the diameter of the shaft is formed, and a surface of the second collar portion facing the second portion of the casing is formed on the second portion. A cylindrical second step portion that extends toward the same axis, is coaxial with the second collar portion, is smaller in diameter than the second collar portion, and larger in diameter than the shaft diameter is formed. A first hole and a second hole through which the shaft is inserted are formed in the first part and the second part, and the first hole of the first part of the casing is smaller in diameter than the first collar part. A first large diameter portion having a diameter larger than the step portion, a diameter smaller than the first step portion, and a diameter smaller than the diameter of the shaft. The second hole of the second part of the casing is smaller in diameter than the second collar part and larger in diameter than the second step part; and 3. The pump according to claim 2, comprising a second small-diameter portion having a diameter smaller than that of the two-stage portion and larger than that of the shaft.

  According to a fourth 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 first and second parts facing each other, and provided on a peripheral surface of the shaft. A flap that divides the casing into a first chamber and a second chamber, a first liquid discharge port provided on the first chamber side of the casing, and a second liquid discharge port provided on the second chamber side of the casing A pump that discharges liquid from the first liquid discharge port or the second liquid discharge port in accordance with the rotation direction of the shaft, and faces the first chamber and the second chamber of the flap. A flap seal portion that is provided along a surface facing the inner wall surface of the casing at a surface other than the surface, is connected to one end side of the flap seal portion, and is pressed against the inner wall surface of the casing; A ring-shaped first shaft seal portion that is provided in a circumferential direction of the shaft and is pressed against the inner wall surface of the first portion of the casing, and is connected to the other end side of the flap seal portion, An annular second shaft seal portion that is provided in a circumferential direction of the shaft and presses against an inner wall surface of the second portion of the casing, one end portion is connected to the first shaft seal portion, and the other end portion is It is connected to the second shaft seal portion, and an intermediate portion is formed of an elastic material including a third shaft seal portion that is provided along the axial direction of the shaft on the circumferential surface of the shaft and presses against the inner wall surface of the casing. A packing is provided, provided between the first liquid discharge port and the second liquid discharge port of the pump, and a pump in which a groove for fitting the packing is formed in the flap and the shaft. If there is no difference between the liquid pressure at the first liquid outlet of the pump and the liquid pressure at the second liquid outlet of the pump, the flow of liquid between the first liquid outlet and the second liquid outlet is blocked. If there is a difference between the liquid pressure at the first liquid discharge port and the liquid pressure at the second liquid discharge port of the pump, two ways permitting the flow of liquid between the first liquid discharge port and the second liquid discharge port A door check device comprising a valve.

  When the door is stopped, there is no difference between the liquid pressure of the first liquid discharge port of the pump and the liquid pressure of the second liquid discharge port of the pump, and the first liquid discharge port, The liquid flow between the second liquid discharge ports is blocked.

  When the door rotates, a difference occurs between the liquid pressure at the first liquid discharge port and the liquid pressure at the second liquid discharge port of the pump, and the liquid between the first liquid discharge port and the second liquid discharge port is generated by the 2-way valve. Flow is allowed. When the flow of liquid between the first liquid discharge port and the second liquid discharge port of the pump is permitted, the liquid discharged from the first liquid discharge port of the pump passes through the 2-way valve and the second liquid of the pump The liquid returned to the discharge port and discharged from the second liquid discharge port of the pump is returned to the first liquid discharge port of the pump via the 2-way valve.

  According to the invention of claim 5, a casing filled with liquid, a shaft disposed in the casing and rotatably supported by the first and second parts facing each other, provided on a peripheral surface of the shaft A flap that divides the casing into a first chamber and a second chamber, a first liquid discharge port provided on the first chamber side of the casing, and a second liquid discharge port provided on the second chamber side of the casing A pump that discharges liquid from the first liquid discharge port or the second liquid discharge port in accordance with the rotation direction of the shaft, and faces the first chamber and the second chamber of the flap. A flap seal portion that is provided along a surface facing the inner wall surface of the casing at a surface other than the surface, is connected to one end side of the flap seal portion, and is pressed against the inner wall surface of the casing; A ring-shaped first shaft seal portion that is provided in a circumferential direction of the shaft and is pressed against the inner wall surface of the first portion of the casing, and is connected to the other end side of the flap seal portion, An annular second shaft seal portion that is provided in a circumferential direction of the shaft and presses against an inner wall surface of the second portion of the casing, one end portion is connected to the first shaft seal portion, and the other end portion is It is connected to the second shaft seal portion, and an intermediate portion is formed of an elastic material including a third shaft seal portion that is provided along the axial direction of the shaft on the circumferential surface of the shaft and presses against the inner wall surface of the casing. A first liquid is provided between the first liquid discharge port and the second liquid discharge port of the pump provided with a packing, and a groove in which the packing is fitted in the flap and the shaft. A first one-way valve that permits a liquid flow from the discharge port to the second liquid discharge port, and the second liquid discharge port between the first liquid discharge port and the second liquid discharge port of the pump; A door check device comprising: a second one-way valve that permits a flow of liquid from the liquid discharge port to the first liquid discharge port.

  When the door is stopped, there is no difference between the liquid pressure at the first liquid outlet of the pump and the liquid pressure at the second liquid outlet of the pump, and the first way valve and the second one way valve As a result, the flow of liquid between the first liquid discharge port and the second liquid discharge port is blocked.

When the door rotates, a difference occurs between the liquid pressure at the first liquid discharge port and the liquid pressure at the second liquid discharge port of the pump.
When the liquid pressure at the first liquid discharge port of the pump is higher than the liquid pressure at the second liquid discharge port, the flow of liquid from the first liquid discharge port to the second liquid discharge port is caused by the first one-way valve. Is allowed.

  When the liquid pressure at the second liquid discharge port of the pump is higher than the liquid pressure at the first liquid discharge port, the liquid flow from the second liquid discharge port to the first liquid discharge port is caused by the second one-way valve. Is allowed.

  According to a sixth 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 first and second parts opposed to the casing, and a peripheral surface of the shaft A flap that divides the inside of the casing into a first chamber and a second chamber, a channel provided between the first chamber and the second chamber of the casing, and a channel provided in the channel A damper having an orifice, provided along a surface facing the inner wall surface of the casing on a surface other than the surface facing the first chamber and the second chamber of the flap, A flap seal portion that presses against the inner wall surface, and is connected to one end side of the flap seal portion, is provided in the circumferential direction of the shaft at the circumferential surface of the shaft, and is provided on the inner wall surface of the first portion of the casing. An annular first shaft that is pressed against A ring-shaped second portion that is connected to the other end side of the seal portion and the flap seal portion, is provided in the circumferential direction of the shaft on the circumferential surface of the shaft, and presses against the inner wall surface of the second portion of the casing. A shaft seal portion, one end portion is connected to the first shaft seal portion, the other end portion is connected to the second shaft seal portion, and an intermediate portion is a circumferential surface of the shaft along the axial direction of the shaft. A packing made of an elastic material comprising a third shaft seal portion that is provided and pressed against an inner wall surface of the casing is provided, and a groove for fitting the packing is formed in the flap and the shaft. It is a damper.

  When a rotational force acts on the shaft, the liquid flows in a flow path provided between the first chamber and the second chamber of the casing. As the liquid passes through the orifice in the flow path, the pipe resistance increases and the energy for rotating the shaft decreases.

  According to the invention of claim 1-6, the flap is provided along a surface facing the inner wall surface of the casing on a surface other than the surface facing the first chamber and the second chamber of the flap, A flap seal portion that presses against the inner wall surface of the first seal portion, and is connected to one end side of the flap seal portion, provided on the circumferential surface of the shaft in the circumferential direction of the shaft, and the inner wall surface of the first portion of the casing An annular first shaft seal portion that is pressed against the other end of the flap seal portion and is connected to the other end side of the flap seal portion. An annular second shaft seal portion that presses against the wall surface, one end portion is connected to the first shaft seal portion, the other end portion is connected to the second shaft seal portion, and an intermediate portion is a peripheral surface of the shaft, Axis of the shaft Provided along the direction, it provided a third shaft sealing portion which presses against the inner wall surface of the casing, a packing made of an elastic material made of. That is, since the packing is integral, the sealing property is good.

Further, since the groove for fitting the packing is formed in the flap and the shaft, the packing is difficult to come off.
Since the packing has elasticity, it can be easily attached.

  According to the invention of claim 2, the peripheral surface of the shaft on the first part side of the casing has a surface that is flush with a surface on which one end side of the flap seal portion of the flap is provided, A first flange portion having a diameter larger than the diameter of the shaft is formed, and the surface of the shaft on the second portion side of the casing is flush with a surface on which the other end side of the flap seal portion of the flap is provided. A second collar portion having the same diameter as the first collar portion, and an axial protrusion from the first collar portion to the second collar portion along the axial direction of the shaft. The axial projection extends flush with the circumferential surface of the first collar portion and the circumferential surface of the second collar portion, and the first shaft seal portion of the packing is provided on the first collar portion. The second collar portion is provided with a second shaft seal portion of the packing. Is, the third shaft seal part of the packing is provided in the axial direction projection.

  That is, the first collar portion has a surface that is flush with a surface on which one end side of the flap seal portion of the flap is provided. Moreover, the 2nd collar part has a surface flush with the surface in which the other edge part side of the said flap seal part of the said flap is provided. Furthermore, the axial protrusion extends flush with the circumferential surface of the first collar and the circumferential surface of the second collar.

  That is, one end side of the flap seal part of the packing and the first shaft seal part are on the same plane. The other end side of the flap seal part of the packing and the second shaft seal part are on the same plane. Therefore, the sealing property is good.

  According to the invention of claim 3, the surface of the first collar portion facing the first portion of the casing extends toward the first portion, is coaxial with the first collar portion, and A columnar first step portion having a diameter smaller than that of the first collar portion and larger than the diameter of the shaft is formed, and a surface of the second collar portion facing the second portion of the casing is formed on the second portion. A cylindrical second step portion extending toward the portion, coaxial with the second collar portion, having a diameter smaller than the second collar portion and larger than the diameter of the shaft is formed, and is opposed to the casing. The first part and the second part are formed with a first hole and a second hole through which the shaft is inserted, and the first hole of the first part of the casing is smaller in diameter than the first collar part, A first large diameter portion having a diameter larger than that of the first step portion, and a diameter smaller than that of the first step portion, the diameter of the shaft. A first small-diameter portion having a large diameter, and the second hole of the second portion of the casing is smaller in diameter than the second collar portion and larger in diameter than the second step portion; The second step portion includes a second small diameter portion having a diameter smaller than that of the second step portion and larger than that of the shaft.

  That is, the first step portion of the shaft is fitted to the first large diameter portion of the first hole of the first portion of the casing, and the shaft is fitted to the first small diameter portion of the first hole of the casing. The second step portion of the shaft is fitted to the second large diameter portion of the second hole of the casing, and the shaft is fitted to the second small diameter portion of the second hole of the casing.

  Therefore, the first step portion of the shaft is in contact with the bottom surface of the first large diameter portion of the first hole of the first portion of the casing, and the second step portion of the shaft is the second hole of the second hole of the second portion of the casing. By abutting the bottom surface of the two large diameter portions, the shaft is positioned in the axial direction, the pressure pressing against the inner wall surface of the casing of the packing is constant, and the sealing performance is good.

"First example"
An example of a door check device using a constant pressure operated two-way valve will be described.
<Overall configuration>
First, the overall configuration will be described with reference to FIG. In the figure, 51 is a pump. The pump 51 is provided with a shaft 69. The shaft 69 is connected to a rotating shaft (hinge pin) of a door (not shown), and rotates with the door when the door rotates. The pump 51 is filled with liquid (oil in this embodiment). Further, the pump 51 is provided with a first liquid discharge port 57 and a second liquid discharge port 59, and liquid is discharged from the first liquid discharge port 57 or the second liquid discharge port 59 according to the rotation direction of the door. It is like that.

Reference numeral 201 denotes a constant pressure operated two-way valve. The constant pressure operation two-way valve 201 is provided with a first liquid inlet 203c and a second liquid inlet 205c.
The first liquid discharge port 57 of the pump 51 and the first liquid introduction port 203c of the constant pressure operation two-way valve 201 are connected using the pipe 41, and the second liquid discharge port 59 of the pump 51 and the constant pressure operation are operated. The second liquid inlet 205 c of the two-way valve 201 is connected using a pipe 43.
<Pump 51>
Next, the pump 51 will be described with reference to FIGS. 3 is an exploded perspective view of the pump of FIG. 2, FIG. 4 is a side view of the pump of FIG. 2, FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG.

  As shown in FIG. 3 to FIG. 6, the pump 51 has a substantially fan-shaped bottom surface and a hollow cylindrical casing body 63 whose upper surface is open, and the open surface of the casing body 63 is closed. And a casing cap 65 to be provided. A casing 60 is constituted by the casing body 63 and the casing cap 65.

  A flap 67 that divides the casing body 63 into a first chamber 81 and a second chamber 83 is provided in the casing body 63. The flap 67 is formed integrally with the shaft 69. One end side of the shaft 69 is fitted into a second hole 63a formed in the bottom surface (second part) of the casing body 63, and the other end side of the shaft 69 is connected to the casing cap 65 (first part). The shaft 69 is rotatably supported by fitting in the first hole 65a formed in the first part. The casing 60 is filled with liquid.

The flap 67 and the shaft 69 are provided with a packing 71 for sealing the inner wall surface of the casing body 63 and the casing cap 65 with the flap 67 and the shaft 69.
The packing 71 according to the present embodiment is an integrally molded product made of an elastic body such as rubber, and has the following parts as shown in FIG.
(1) A flap seal portion that is provided along a surface facing the inner wall surface of the casing 60 on a surface other than the surfaces facing the first chamber 81 and the second chamber 83 of the flap 67 and presses against the inner wall surface of the casing 60. 73.
(2) An annular first shaft connected to one end side of the flap seal portion 73, provided on the circumferential surface of the shaft 69 in the circumferential direction of the shaft 69, and pressed against the inner wall surface of the first portion of the casing 60. Seal part 75.

An annular second shaft seal portion that is connected to the other end portion side of the flap seal portion 73, is provided in the circumferential direction of the shaft 69 on the circumferential surface of the shaft 69, and presses against the inner wall surface of the second portion of the casing 60. 77.
(3) One end portion is connected to the first shaft seal portion 75, the other end portion is connected to the second shaft seal portion 77, and an intermediate portion is provided on the peripheral surface of the shaft 69 along the axial direction of the shaft 69. A third shaft seal portion 79 that presses against the inner wall surface of the casing 60.

  The peripheral surface of the shaft 69 on the casing cap 65 (first part) side of the casing 60 has a surface that is flush with the surface on which one end side of the flap seal portion 73 of the flap 67 is provided. A first collar portion 69a having a larger diameter is formed. In addition, the peripheral surface of the shaft 69 on the bottom surface (second part) side of the casing body 63 of the casing 60 has a surface flush with the surface on which the other end side of the flap seal portion 73 of the flap 67 is provided, A second collar portion 69b having the same diameter as the first collar portion 69a and a diameter larger than the diameter of the shaft 69 is formed. Furthermore, an axial projection 69f is formed from the first collar 69a to the second collar 69b along the axial direction of the shaft 69, and the axial projection 69f is a circumferential surface of the first collar 69a. The second collar portion 69b extends flush with the peripheral surface.

  A first shaft seal portion 75 of packing is provided on the first collar portion 69a, a second shaft seal portion 77 of packing is provided on the second collar portion 69b, and a third shaft seal of packing is provided on the axial projection 69f. A portion 79 is provided.

  A surface of the casing 60 of the first collar portion 69a that faces the casing cap 65 (first portion) extends toward the casing cap 65 (first portion), is coaxial with the first collar portion 69a, and has a first collar. A cylindrical first step portion 69d having a diameter smaller than that of the portion 69a and larger than that of the shaft 69 is formed.

  The surface of the casing 60 of the second collar portion 69b facing the bottom surface (second portion) of the casing body 63 extends toward the bottom surface (second portion) of the casing body 63 and is coaxial with the second collar portion 69b. A cylindrical second step portion 69e having a diameter smaller than that of the second collar portion 69b and larger than that of the shaft 69 is formed.

  The first hole 65a of the casing cap 65 (first portion) of the casing 60 has a first large diameter portion 65b having a diameter smaller than that of the first collar portion 69a and larger than that of the first step portion 69d, and a first step. The first small diameter portion 65c is smaller in diameter than the portion 69d and larger in diameter than the shaft 69. On the other hand, the second hole 63a in the bottom surface (second portion) of the casing body 63 of the casing 60 has a second large diameter portion 63c having a diameter smaller than that of the second collar portion 69b and larger than that of the second step portion 69e, The second small-diameter portion 63d is smaller in diameter than the two-step portion 69e and larger in diameter than the shaft 69.

  The flap 67 is formed with a groove 67 a in which the flap seal portion 73 of the packing 71 is fitted on a surface other than the surfaces facing the first chamber 81 and the second chamber 83. The first collar portion 69 a of the shaft 69 is formed with a groove 69 c that is connected to the groove 67 a of the flap 67 and into which the first shaft seal portion 75 of the packing 71 is fitted. A groove 69 h that is connected to the groove 67 a of the flap 67 and fits with the second shaft seal part 77 of the packing 71 is formed in the second collar portion 69 b of the shaft 69. Further, one end of the axial protrusion 69f of the shaft 69 is connected to the groove 69c, the other end is connected to the groove 69h, and an intermediate portion is a circumferential surface of the shaft 69 along the axial direction of the shaft 69. A groove 69i that is provided and into which the third shaft seal portion 79 of the packing 71 is fitted is formed.

The operation of the pump 51 having the above configuration will be described. When a door (not shown) rotates, the shaft 69 and the flap 67 also rotate, and liquid is discharged from the first liquid discharge port 57 or the second liquid discharge port 59 according to the rotation direction of the door.
<Constant pressure operation 2-way valve 201>
Next, the constant pressure operation two-way valve 201 will be described with reference to FIG. FIG. 1 is a cross-sectional view of a constant pressure operated two-way valve. FIG. 1 (a) is a diagram showing a state in which the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber is not more than a set value, The figure which shows the state where the liquid pressure in the first chamber is higher than the liquid pressure in the second chamber and the difference exceeds the set value, (c) the figure shows that the liquid pressure in the second chamber is higher than the liquid pressure in the first chamber, It is a figure which shows the state in which the difference exceeded the setting value.

  As shown in FIG. 1A, the constant pressure operation two-way valve 201 has a first chamber 203 filled with a liquid, a second chamber 205 filled with a liquid, a first chamber 203, A connection portion 207 provided between the second chamber 205 and the second chamber 205 is formed.

  The cross-sectional shapes of the first chamber 203, the second chamber 205, and the connection portion 207 are circular with the centers positioned on the same straight line. Further, the cross-sectional shape of the connection portion 207 is the same as that of the first chamber 203 and the second chamber 205. It is set smaller than the cross-sectional shape.

  A guide hole 203a and a guide hole 205a are formed in a surface 203b of the first chamber 203 opposite to the connection portion 207 side and a surface 205b of the second chamber 205 opposite to the connection portion 207 side. These guide holes 203a and guide holes 205a are formed along the same straight line.

  One end of the shaft 211 is loosely fitted in the guide hole 203a, and the other end is loosely fitted in the guide hole 205a. The length (l) of the shaft 211 is set to be shorter than the length (L) from the bottom surface of the guide hole 203a to the bottom surface of the guide hole 205a. Therefore, the shaft 211 is movable in the axial direction.

  A valve body 213 is attached to the shaft 211. The valve body 213 is provided so as to be movable between the first chamber 203 and the second chamber 205 via the connecting portion 207 when the shaft 211 moves in the axial direction thereof. Further, an O-ring 215 is provided on the peripheral surface of the valve body 213, and when the valve body 213 is positioned at the connection portion 207, the O-ring 215 is pressed against the wall surface of the connection portion 207, The space between the second chamber 205 is sealed, and the flow of liquid between the first chamber 203 and the second chamber 205 is blocked.

  A shaft 211 is wound around the first chamber 203, one end abuts against the surface 203 b, the other end abuts against the valve body 213, and a spring 221 that biases the valve body 213 toward the second chamber 205 (first 1 biasing means) is provided. A shaft 211 is wound around the second chamber 205, one end abuts against the surface 205 b, the other end abuts against the valve body 213, and a spring 223 that biases the valve body 213 toward the first chamber 203 (first 2 biasing means) is provided.

  If the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 is equal to or less than the set value, the valve body 213 is positioned at the connection portion 207 and the liquid pressure in the first chamber 203 is When the difference between the liquid pressure in the two chambers 205 exceeds the set value, the valve body 213 is moved toward the chamber having the lower liquid pressure, and the liquid is moved from the chamber having the higher liquid pressure toward the chamber having the lower liquid pressure. The biasing force of the spring 221 and the spring 223 is set so as to flow.

The operation of the constant pressure operation two-way valve 201 having the above configuration will be described.
If the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 is equal to or less than the set value, the valve body 213 is positioned at the connection portion 207 as shown in FIG.

When the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 exceeds the set value, as shown in FIG. 1B or FIG. The valve body 213 moves toward the chamber having a lower liquid pressure against the urging force of the spring provided in the, and the liquid flows from the chamber having the higher liquid pressure toward the chamber having the lower liquid pressure.
<Operation of door check device>
When the door rotates, the liquid is discharged from one of the first liquid discharge port 57 and the second liquid discharge port 59 of the pump 51 depending on the rotation direction of the door. When the liquid is discharged from the first liquid discharge port 57 of the pump 51, the liquid passes through the pipe 41 and the liquid pressure in the first chamber 203 of the constant pressure operation two-way valve 201 increases. When the liquid is discharged from the second liquid discharge port 59 of the pump 51, the liquid passes through the pipe 43 and the liquid pressure in the second chamber 205 of the constant pressure operation two-way valve 201 is increased.

If the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 of the constant pressure operation two-way valve 201 is equal to or less than the set value, the valve body 213 is positioned at the connection portion 207.
When the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 of the constant pressure operated two-way valve 201 exceeds a set value, the biasing force of a spring provided in the chamber with the lower liquid pressure Against this, the valve body 213 moves toward the chamber with the lower liquid pressure, and the liquid flows from the chamber with the higher liquid pressure toward the chamber with the lower liquid pressure. The liquid that has flowed toward the smaller chamber is returned to the pump 51.

  If the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 of the constant pressure operation two-way valve 201 is equal to or less than the set value, the valve body 213 is positioned at the connection portion 207, so that the rotation of the door It becomes a big resistance to. In other words, the door maintains its state at an arbitrary position unless a large force is applied.

  However, when the door starts to rotate and the difference between the liquid pressure in the first chamber 203 and the liquid pressure in the second chamber 205 of the constant pressure operation two-way valve 201 exceeds the set value, the chamber having the smaller liquid pressure is used. Since the valve body 213 moves toward the chamber and the liquid flows from the chamber having the higher liquid pressure toward the chamber having the lower liquid pressure, the resistance to the rotation of the door is reduced. That is, once the door starts to open and close, it can be opened and closed with a small force.

According to such a configuration, the following effects can be obtained.
(1) The packing 71 is provided along a surface facing the inner wall surface of the casing 60 on a surface other than the surfaces facing the first chamber 81 and the second chamber 83 of the flap 67, and is pressed against the inner wall surface of the casing 60. A flap seal portion 73 that is in contact with each other, and an annular shape that is connected to one end side of the flap seal portion 73, is provided in the circumferential direction of the shaft 69 on the circumferential surface of the shaft 69, and is pressed against the inner wall surface of the first portion of the casing 60 The first shaft seal portion 75 and the other end portion of the flap seal portion 73 are connected to each other, provided on the circumferential surface of the shaft 69 in the circumferential direction of the shaft 69, and on the inner wall surface of the second portion of the casing 60. An annular second shaft seal portion 77 that is pressed against, one end portion of which is connected to the first shaft seal portion 75, the other end portion is connected to the second shaft seal portion 77, and an intermediate portion is a peripheral surface of the shaft 69. It provided along the axial direction of 9, by consisting of a third shaft sealing portion 79 which presses against the inner wall surface of the casing 60, and a packing 71 as integral, good sealing properties.
(2) The packing 71 is disengaged by fitting into the groove 67a of the flap 67, the groove 69c of the first collar 69a of the shaft 69, the groove 69h of the second collar 69b, and the groove 69i of the axial protrusion 69f. Hateful.
(3) Since the packing 71 has elasticity, attachment is also easy.
(4) The first collar portion 69 a has a surface that is flush with the surface on which one end side of the flap seal portion 73 of the flap 67 is provided. The second collar portion 69 b has a surface that is flush with the surface on which the other end portion side of the flap seal portion 73 of the flap 67 is provided. Furthermore, the axial protrusion 69f extends flush with the circumferential surface of the first collar portion 69a and the circumferential surface of the second collar portion 69b.

That is, one end side of the flap seal portion 73 of the packing 71 and the first shaft seal portion 75 are on the same plane. The other end side of the flap seal portion 73 of the packing 71 and the second shaft seal portion 77 are on the same plane. Therefore, the sealing property is good.
(5) The surface of the first collar portion 69a facing the casing cap 65 (first portion) of the casing 60 extends toward the casing cap 65 (first portion), and is coaxial with the first collar portion 69a. A cylindrical first step portion 69d having a diameter smaller than that of the first collar portion 69a and larger than that of the shaft 69 is formed.

  The surface of the casing 60 of the second collar portion 69b facing the bottom surface (second portion) of the casing body 63 extends toward the bottom surface (second portion) of the casing body 63 and is coaxial with the second collar portion 69b. A cylindrical second step portion 69e having a diameter smaller than that of the second collar portion 69b and larger than that of the shaft 69 is formed.

  The first hole 65a of the casing cap 65 (first portion) of the casing 60 has a first large diameter portion 65b having a diameter smaller than that of the first collar portion 69a and larger than that of the first step portion 69d, and a first step. The first small diameter portion 65c is smaller in diameter than the portion 69d and larger in diameter than the shaft 69. On the other hand, the second hole 63a in the bottom surface (second portion) of the casing body 63 of the casing 60 has a second large diameter portion 63c having a diameter smaller than that of the second collar portion 69b and larger than that of the second step portion 69e, The second small-diameter portion 63d is smaller in diameter than the two-step portion 69e and larger in diameter than the shaft 69.

  That is, the first large diameter portion 65b of the first hole 65a of the casing cap 65 (first portion) of the casing 60 is provided with the first step portion 69d of the shaft 69 and the first small diameter portion 65c of the first hole 65a of the casing 60. A shaft 69 is fitted into the shaft. The second large diameter portion 63 c of the second hole 63 a of the bottom surface (second portion) of the casing body 63 of the casing 60 is provided with a second step portion 69 e of the shaft 69 and the second small diameter portion 63 d of the second hole 63 a of the casing 60. A shaft 69 is fitted into the shaft.

Therefore, the first step portion 69d of the shaft 69 abuts on the bottom surface of the first large diameter portion 65b of the first hole 65a of the casing 60, and the second step portion 69e of the shaft 69 corresponds to the second hole 63a of the casing 60. By contacting the bottom surface of the second large diameter portion 63c, the shaft 69 is positioned in the axial direction, the pressure of the packing 71 pressing against the inner wall surface of the casing 60 is constant, and the sealing performance is good.
(6) Thus, the performance of a door check apparatus does not vary by using the pump 51 with good sealing performance.

  In the above description, the pump 51 constituting the door check device and the constant pressure operation two-way valve 201 have been described as separate bodies. However, as shown in FIGS. It is good also as a door check apparatus with which the valve was integrated.

  As shown in FIG. 7, the door 300 is rotatably attached to the body 305 using an upper hinge 301 and a lower hinge 303. A door check device 401 in which the pump and the constant pressure operation two-way valve are integrated is provided on the upper hinge 301 side.

  As shown in FIG. 8, 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 of the hinge female 311. The hinge pin 315 is loosely fitted in the hole 311a provided in the door, is fitted in the hole 313a provided on the distal end side of the hinge mail 313, and rotates integrally with the hinge mail 313 on the door 300 side. . The door check device 401 is attached to the lower part of the hinge mail 313 on the door 300 side.

FIG. 9 is an exploded perspective view of the door check device 401. In FIG. 9, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals (′), and redundant description is omitted.
As shown in the figure, the constant pressure operation 2-way valve 201 ′ of the door check device 401 is formed integrally with the casing 63 ′ of the pump 51 ′. A channel 41 ′ is formed in the wall portion between the pump 51 ′ of the casing 63 ′ and the constant pressure operation two-way valve 201 ′, and an open surface on one end side of the channel 41 ′ is a pump. The second liquid discharge port 59 ′ of 51 ′ and the open surface on the other end side serve as the second liquid introduction port 205c ′ of the constant pressure operation two-way valve 201 ′.

  The first liquid discharge port 57 'of the pump 51' is provided in the casing cap 65 '. The casing cap 65 ′ has a hole 65 a ′ through which the shaft 69 ′ of the pump 51 ′ is inserted and a hole 65 b ′ formed at a position facing the first chamber 203 ′ of the constant pressure operation two-way valve 201 ′. Has been.

  A laminated member 403 is provided on the casing cap 65 ′ of the pump 51 ′. The laminated member 403 has a hole 403a through which the shaft 69 'of the pump 51' is inserted. Further, one end of the laminated member 403 is fitted into the first chamber 203 ′ of the constant pressure operation two-way valve 201 ′ through the hole 65b ′ of the casing cap 65 ′, and one end of the shaft 211 ′ is fitted. A convex portion 403b is formed in which a guide hole 203a ′ for supporting the end portion is formed. The diameter of the convex portion 403b is set smaller than the hole 65b 'of the casing cap 65'. A groove-like channel 43 ′ is formed on the surface of the laminated member 403 that contacts the casing cap 65 ′, and one end of the channel 43 ′ is connected to the hole 57 ′ of the casing cap 65 ′. The other end side is connected to the hole 65b ′ of the casing cap 65 ′. Accordingly, the hole 65b 'of the casing cap 65' functions as the first liquid inlet 203c 'of the constant pressure operation two-way valve 201'.

In addition, the lower portion of the second chamber 205 ′ of the constant pressure operation two-way valve 201 ′ is an open surface and is blocked by a cap 405 in which a guide hole 205a ′ is formed.
As shown in FIG. 8, a shaft 69 ′ having a non-circular cross section of the pump 51 ′ is fitted to the lower end portion of the hinge pin 315 of the upper hinge 301, and the hinge pin 315 and the shaft 69 ′ of the pump 51 ′ are integrated with each other. And rotate.

Further, as shown in FIG. 10, the sealing performance is further improved by adding R to the corner portion 65 f of the inner wall surface of the casing cap 65.
"Second example"
An example in which the pump 51 of the first embodiment is applied to a rotary damper will be described with reference to FIG. In the figure, the first liquid discharge port 57 in the first chamber of the casing and the second liquid discharge port 59 in the second chamber of the casing are connected by a pipe 351 as a flow path. An orifice 353 is formed in the pipe 351.

  The operation will be described. When a rotational force acts on the shaft 69, the liquid flows in a pipe 351 that is a flow path provided between the first chamber and the second chamber of the casing. As the liquid passes through the orifice 353 in the pipe 351, the pipe resistance increases and the energy for rotating the shaft 69 decreases.

According to such a configuration, the performance of the rotary damper does not vary by using the pump 51 with good sealing performance.
"Third example"
Another example in which the pump 51 of the first embodiment is applied to a rotary damper will be described with reference to FIG. FIG. 12 is a top view (drawing corresponding to FIG. 5) when the bottom surface of the casing body is the bottom surface with the casing cap of the pump 51 removed.

  A through hole 361 that functions as a flow path provided between the first chamber 81 and the second chamber 83 is formed in the flap 67. An orifice 363 is formed in the through hole 361.

  The operation will be described. When a rotational force is applied to the shaft 69, the liquid flows into a through hole 361 that is a flow path provided between the first chamber and the second chamber of the casing. When the liquid passes through the orifice 363 in the through hole 361, the pipe resistance increases, and the energy for rotating the shaft 69 decreases.

According to such a configuration, the performance of the rotary damper does not vary by using the pump 51 with good sealing performance. Furthermore, since the flow path and the orifice are formed in the flap 67, it is more compact than the second embodiment.
"Fourth example"
A fourth embodiment will be described with reference to the drawings. In the first embodiment, the constant pressure operation two-way valve 201 is used, but it is possible to use two constant pressure operation one-way valves.

  As shown in FIG. 13, a constant pressure operation 1-way valve 701 and a constant pressure operation 1-way valve 703 are provided between the first liquid discharge port 57 and the second liquid discharge port 59 of the pump 51. . The constant pressure operation 1-way valves 701 and 703 are 1-way valves configured not to be opened until the pressure difference between the liquid introduction port side and the liquid discharge port side exceeds a set value.

  The constant pressure operation 1-way valve 701 is configured so that the first liquid discharge port 57 is not different between the liquid pressure of the first liquid discharge port 57 of the pump 59 and the liquid pressure of the second liquid discharge port 59 of the pump 51. The liquid flow between the second liquid discharge ports 59 is blocked, the liquid pressure at the first liquid discharge port 57 of the pump 51 is higher than the liquid pressure at the second liquid discharge port 59, and the difference exceeds the set value. And the liquid flow from the first liquid discharge port 57 to the second liquid discharge port 59 is permitted.

  On the other hand, if there is no difference between the liquid pressure at the first liquid discharge port 57 of the pump 51 and the liquid pressure at the second liquid discharge port 59 of the pump 51, the constant pressure operation 1-way valve 703 is the first liquid discharge port 57. The liquid flow between the second liquid discharge ports 59 is blocked, the liquid pressure of the second liquid discharge port 59 of the pump 51 is higher than the liquid pressure of the first liquid discharge port 57, and the difference exceeds the set value. And the liquid flow from the second liquid discharge port 59 to the first liquid discharge port 57 is permitted.

  Even if it is such a structure, the effect similar to a 1st example can be acquired.

It is sectional drawing of the constant-pressure operation | movement 2-way valve of an example, (a) A figure shows the state from which the difference of the liquid pressure in a 1st chamber and the liquid pressure in a 2nd chamber is below a setting value, (b) The figure is The figure which shows the state where the liquid pressure in the first chamber is higher than the liquid pressure in the second chamber and the difference exceeds the set value, (c) the figure shows that the liquid pressure in the second chamber is higher than the liquid pressure in the first chamber, It is a figure which shows the state in which the difference exceeded the setting value. It is a figure explaining the whole door check device composition of the example of the 1st form. It is a disassembled perspective view of the pump of FIG. It is a side view of the pump of FIG. FIG. 5 is a cross-sectional view taken along a cutting line AA in FIG. 4. FIG. 6 is a cross-sectional view taken along a cutting line BB in FIG. 5. It is a disassembled perspective view around the door provided with a door check device in which a constant pressure operation 2-way valve and a pump are integrated. It is the figure which expanded the upper hinge part of FIG. It is a disassembled perspective view of the door check apparatus of FIG. It is a figure explaining the other form example. It is a figure explaining the damper of the 2nd form example. It is a figure explaining the damper of the 3rd form example. It is a figure explaining the door check apparatus of the 4th example.

Explanation of symbols

57 first liquid discharge port 59 second liquid discharge port 60 casing 67 flap 69 shaft 71 packing 73 flap seal portion 75 first shaft seal portion 77 second shaft seal portion 79 third shaft seal portion

Claims (6)

A casing filled with liquid;
A shaft disposed in the casing and rotatably supported by the first and second parts facing each other;
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 liquid discharge port provided on the first chamber side of the casing;
A second liquid discharge port provided on the second chamber side of the casing,
A pump that discharges liquid from the first liquid discharge port or the second liquid discharge port according to the rotation direction of the shaft;
A flap seal portion that is provided along a surface facing the inner wall surface of the casing on a surface other than the surface facing the first chamber and the second chamber of the flap, and presses against the inner wall surface of the casing;
An annular first shaft seal portion connected to one end side of the flap seal portion, provided on the circumferential surface of the shaft in the circumferential direction of the shaft, and pressed against the inner wall surface of the first portion of the casing; ,
An annular second shaft seal portion connected to the other end side of the flap seal portion, provided on the circumferential surface of the shaft in the circumferential direction of the shaft, and pressed against the inner wall surface of the second portion of the casing; ,
One end portion is connected to the first shaft seal portion, the other end portion is connected to the second shaft seal portion, an intermediate portion is provided on the peripheral surface of the shaft along the axial direction of the shaft, and the casing A third shaft seal portion that presses against the inner wall surface of
A packing made of an elastic material made of
A pump in which a groove for fitting the packing is formed in the flap and the shaft. The circumferential surface of the shaft on the first part side of the casing has a surface flush with a surface on which one end side of the flap seal portion of the flap is provided, and has a diameter larger than the diameter of the shaft. A collar is formed,
The circumferential surface of the shaft on the second part side of the casing has a surface that is flush with the surface on which the other end side of the flap seal portion of the flap is provided, and has the same diameter as the first collar portion. Two collar parts are formed,
An axial protrusion is formed from the first collar portion to the second collar portion along the axial direction of the shaft,
The axial protrusion extends flush with the circumferential surface of the first collar portion and the circumferential surface of the second collar portion,
A first shaft seal portion of the packing is provided on the first collar portion;
A second shaft seal portion of the packing is provided on the second collar portion;
The pump according to claim 1, wherein a third shaft seal portion of the packing is provided on the axial protrusion. The surface of the first collar portion facing the first portion of the casing extends toward the first portion, is coaxial with the first collar portion, has a smaller diameter than the first collar portion, and has the shaft. A cylindrical first step portion having a diameter larger than the diameter of
A surface of the second flange portion facing the second portion of the casing extends toward the second portion, is coaxial with the second flange portion, and has a diameter smaller than that of the second flange portion. A cylindrical second step portion having a diameter larger than the diameter of
A first hole and a second hole through which the shaft is inserted are formed in the first part and the second part facing the casing,
The first hole of the first portion of the casing is smaller in diameter than the first collar portion, larger in diameter than the first step portion, and smaller in diameter than the first step portion, and the shaft A first small diameter portion having a diameter larger than the diameter of
The second hole of the second part of the casing is smaller in diameter than the second collar part, larger in diameter than the second step part, and smaller in diameter than the second step part, and the shaft The pump according to claim 2, comprising a second small diameter portion having a diameter larger than that of the second small diameter portion. A casing filled with a liquid, a shaft disposed in the casing and rotatably supported by the first and second parts facing each other, provided on a peripheral surface of the shaft, and the first inside the casing. A flap divided into a chamber and a second chamber, a first liquid discharge port provided on the first chamber side of the casing, and a second liquid discharge port provided on the second chamber side of the casing, and rotation of the shaft A pump that discharges liquid from the first liquid discharge port or the second liquid discharge port according to a direction, wherein the casing is provided on a surface other than the surface facing the first chamber and the second chamber of the flap. A flap seal portion that is provided along a surface facing the inner wall surface of the casing and that is pressed against the inner wall surface of the casing, and is connected to one end side of the flap seal portion. An annular first shaft seal portion that is provided in a direction and presses against an inner wall surface of the first portion of the casing, and is connected to the other end side of the flap seal portion. An annular second shaft seal portion that is provided in a direction and presses against the inner wall surface of the second portion of the casing, one end portion is connected to the first shaft seal portion, and the other end portion is connected to the second shaft seal portion. An intermediate portion is provided on the peripheral surface of the shaft along the axial direction of the shaft, and a packing made of an elastic material including a third shaft seal portion that presses against an inner wall surface of the casing is provided, the flap, A pump having a groove into which the packing is fitted in the shaft;
A difference between the liquid pressure at the first liquid discharge port of the pump and the liquid pressure at the second liquid discharge port of the pump, provided between the first liquid discharge port and the second liquid discharge port of the pump. If there is not, the flow of the liquid between the first liquid discharge port and the second liquid discharge port is blocked, and there is a difference between the liquid pressure at the first liquid discharge port and the liquid pressure at the second liquid discharge port of the pump. A two-way valve that allows the flow of liquid between the first liquid discharge port and the second liquid discharge port;
A door check device characterized by comprising: A casing filled with a liquid, a shaft disposed in the casing and rotatably supported by the first and second parts facing each other, provided on a peripheral surface of the shaft, and the first inside the casing. A flap divided into a chamber and a second chamber, a first liquid discharge port provided on the first chamber side of the casing, and a second liquid discharge port provided on the second chamber side of the casing, and rotation of the shaft A pump that discharges liquid from the first liquid discharge port or the second liquid discharge port according to a direction, wherein the casing is provided on a surface other than the surface facing the first chamber and the second chamber of the flap. A flap seal portion that is provided along a surface facing the inner wall surface of the casing and that is pressed against the inner wall surface of the casing, and is connected to one end side of the flap seal portion. An annular first shaft seal portion that is provided in a direction and presses against an inner wall surface of the first portion of the casing, and is connected to the other end side of the flap seal portion. An annular second shaft seal portion that is provided in a direction and presses against the inner wall surface of the second portion of the casing, one end portion is connected to the first shaft seal portion, and the other end portion is connected to the second shaft seal portion. An intermediate portion is provided on the peripheral surface of the shaft along the axial direction of the shaft, and a packing made of an elastic material including a third shaft seal portion that presses against an inner wall surface of the casing is provided, the flap, A pump having a groove into which the packing is fitted in the shaft;
A first one-way valve provided between the first liquid discharge port and the second liquid discharge port of the pump and permitting a liquid flow from the first liquid discharge port to the second liquid discharge port; ,
A second one-way valve provided between the first liquid discharge port and the second liquid discharge port of the pump and permitting a liquid flow from the second liquid discharge port to the first liquid discharge port;
A door check device characterized by comprising: A casing filled with liquid;
A shaft disposed in the casing and rotatably supported by the first and second parts facing each other;
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 flow path provided between the first chamber and the second chamber of the casing;
An orifice provided in the flow path;
A damper having
A flap seal portion that is provided along a surface facing the inner wall surface of the casing on a surface other than the surface facing the first chamber and the second chamber of the flap, and presses against the inner wall surface of the casing;
An annular first shaft seal portion connected to one end side of the flap seal portion, provided on the circumferential surface of the shaft in the circumferential direction of the shaft, and pressed against the inner wall surface of the first portion of the casing; ,
An annular second shaft seal portion connected to the other end side of the flap seal portion, provided on the circumferential surface of the shaft in the circumferential direction of the shaft, and pressed against the inner wall surface of the second portion of the casing; ,
One end portion is connected to the first shaft seal portion, the other end portion is connected to the second shaft seal portion, an intermediate portion is provided on the peripheral surface of the shaft along the axial direction of the shaft, and the casing A third shaft seal portion that presses against the inner wall surface of
A packing made of an elastic material made of
A damper in which a groove for fitting the packing is formed in the flap and the shaft.

Images