JP2009102860A - Door checking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door checking device capable of being easily assembled. <P>SOLUTION: This door checking device has a casing 60 composed of a casing body 63 and a cap 65, a shaft 69, a flap 67 provided on a peripheral face of the shaft 69 to divide the inside of the casing 60 into a first chamber and a second chamber, a packing 71 having a sealing part pressed against and coming into contact with an inner peripheral face of the casing body 63, and a valve means shutting-off/allowing flow of liquid between the first and second chambers. An assembly composed of the shaft 69 and the flap 67 to which the packing 71 is attached is inserted through an opened face of the casing body 63. A recessed part 101 extended toward a bottom part from the opened face and fitting the sealing part of the packing 71 when inserting the assembly through the opened face of the casing body 63 is formed on the inner peripheral face of the casing body 63. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door check device.

  A hollow casing that is filled with a liquid and has a bottom and a surface facing the bottom is an open surface; a cap that closes the open surface; and the bottom and the cap that are disposed in the casing and are opposed to the casing A shaft rotatably supported on the shaft, a flap that is provided on a peripheral surface of the shaft and divides the inside of the casing into a first chamber and a second chamber, and a first liquid discharge provided on the first chamber side of the casing. It has an outlet and a second liquid discharge port provided on the second chamber side of the casing, and discharges liquid from the first liquid discharge port or the second liquid discharge port according to the rotation direction of the shaft. A pump is known (see, for example, Patent Document 1).

It is also known to provide a seal portion that presses the inner peripheral surface of the casing body on the flap of the pump (see, for example, Patent Document 2).
JP 2004-286128 A (FIGS. 10, 11, and 14) JP 2003-214368 A (FIGS. 5 and 6)

  However, when assembling the pump having the configuration described in Patent Document 1, there is a step of inserting the assembly in which the shaft and the flap provided with the seal portion are assembled into the casing from the open surface of the casing.

On the other hand, as described in Patent Document 2, the seal portion is provided on the flap so as to be pressed against the inner peripheral surface of the casing.
Therefore, the assembly must be inserted into the casing from the open surface of the casing in a state where the seal portion is elastically deformed.

  The present invention has been made in view of the above problems, and an object thereof is to provide a door check device that can be easily assembled.

  The invention according to claim 1 is disposed in the casing, which is filled with a liquid, and includes a hollow casing body having a bottom portion and a surface facing the bottom portion being an open surface, and a cap closing the open surface, The opposed bottom portion of the casing, a shaft rotatably supported by the cap, 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, an inner peripheral surface of the casing body If the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber is equal to or less than a set value, the liquid flow between the first chamber and the second chamber And a valve means for permitting the flow of liquid between the first chamber and the second chamber when the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber exceeds a set value. The shaft and packing are removed. An assembly comprising a cut flap is inserted from the open surface of the casing body, the casing is provided on one of the vehicle body side and the door side, and the shaft is on the vehicle body side and the door side In the door check device provided on the other side, the inner surface of the casing body extends from the open surface toward the bottom, and the assembly is inserted from the open surface of the casing body. The door check device is characterized in that a recess for fitting the seal portion of the packing is formed.

When the door is stopped, the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber is equal to or less than a set value, and the liquid between the first chamber and the second chamber is less than the set value by the valve means. The flow is interrupted.
When the door rotates, the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber exceeds a set value, and the flow of liquid between the first chamber and the second chamber is permitted by the valve means.

  According to a second aspect of the present invention, the packing is connected to a flap seal portion and one end side of the flap seal portion, and is provided in a circumferential direction of the shaft on a peripheral surface of the shaft. An annular first shaft seal portion that presses against the inner peripheral surface of the cap, and is connected to the other end side of the flap seal portion, and is provided in the circumferential direction of the shaft on the peripheral surface of the shaft, and the casing An annular second shaft seal portion that presses against the inner peripheral surface of the bottom 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 the A third shaft seal portion that is provided along the axial direction of the shaft on the peripheral surface of the shaft and that presses against the inner peripheral surface of the casing body, and the opening is formed on the inner peripheral surface of the casing body. From the first recess into which the flap seal portion is inserted and the second recess into which the third shaft seal portion is inserted, at least one recess is formed. A door check device according to claim 1.

  According to a third aspect of the present invention, at least one of the first recess and the second recess is one of the flap seal portion of the packing and the third shaft seal portion when the door is fully closed. The door check device according to claim 2, wherein the door check device is formed at a position facing the seal portion.

  The invention according to claim 4 is characterized in that at least one of the first recess and the second recess has a gradually decreasing depth in the circumferential direction as the door is opened. The door check device according to 2 or 3.

  According to the first to fourth aspects of the present invention, when the assembly is inserted from the open surface of the casing main body, the packing extends from the open surface toward the bottom portion on the inner peripheral surface of the casing main body. When the assembly in which the shaft and the flap to which the packing is attached is inserted into the casing from the open surface of the casing body, the sealing portion of the packing is formed. By inserting into the recess, the assembly is guided to the recess and the assembly is assembled to the casing. Therefore, assembly becomes easy.

  According to the invention of claim 2, the packing is connected to a flap seal part and one end side of the flap seal part, and is provided in the circumferential direction of the shaft on the peripheral surface of the shaft, An annular first shaft seal portion that presses against the inner peripheral surface of the cap of the casing, and is connected to the other end side of the flap seal portion, and is provided in the circumferential direction of the shaft on the peripheral surface of the shaft, An annular second shaft seal portion that presses against the inner peripheral surface of the bottom 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; Is provided on the peripheral surface of the shaft along the axial direction of the shaft, and has a third shaft seal portion that presses against the inner peripheral surface of the casing body, so that the packing is integrated. Ri, good sealing properties. In addition, at least one of a first indent extending into the inner peripheral surface of the casing body from the open surface toward the bottom and into which the flap seal is inserted, and a second indent into which the third shaft seal is inserted. When one of the recesses is formed, the flap seal portion of the packing, the third seal, when the assembly in which the shaft and the flap to which the packing is attached is assembled is inserted into the casing from the open surface of the casing body. By inserting at least one of the seal portions of the shaft seal into the first recess and at least one of the second recesses, the assembly is assembled to the casing by being guided by the recess. Therefore, assembly becomes easy.

  According to the third aspect of the present invention, at least one of the first recess and the second recess is a flap seal portion of the packing when the door is fully closed, or a third shaft seal portion. By being formed at a position facing one seal portion, in the fully closed state, the seal between the first chamber and the second chamber has been removed. Therefore, when the fully closed door is opened, the force for opening the valve means becomes unnecessary, and the opening of the door can be lightened.

  According to the invention of claim 4, at least one of the first recess and the second recess has a casing body whose depth in the circumferential direction gradually decreases as the door is opened. The boundary between the inner peripheral surface and the indentation is an obtuse corner. Therefore, when the seal portion is detached from the recess, damage to the seal portion due to the corner portion can be reduced.

<Overall configuration>
First, the overall configuration will be described with reference to FIG. In the figure, 51 is a pump. This 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). 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 in accordance with the rotation direction of the door. It is like that.

  Reference numeral 201 denotes a constant pressure operated two-way valve as valve means. 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. 4 is an exploded perspective view of the pump of FIG. 3, FIG. 5 is a side view of the pump of FIG. 3, FIG. 6 is a cross-sectional view taken along line AA in FIG. FIG.

  4-7, the pump 51 includes a hollow bottomed cylindrical casing body 63 having a substantially fan-shaped bottom and an open surface 63b on the bottom, and an open surface 63b of the casing body 63. And a flat-plate-like casing cap (cap) 65 provided so as to close the cover. 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. Then, one end side of the shaft 69 is fitted into a second hole 63a formed in the bottom 63e of the casing body 63, and the other end side of the shaft 69 is a first formed in the casing cap 65. The shaft 69 fits into the hole 65a and is rotatably supported. The casing 60 is filled with liquid.

The casing 60 is fixed to the body side. Therefore, when the door is opened and closed, the shaft 69 and the casing 60 rotate relative to each other.
The casing 60 may be provided on the door side so that the rotation axis of the door to which the shaft 69 is connected is not rotated by opening and closing the door, and when the door is opened and closed, the shaft 69 and the casing 60 may rotate relative to each other. .

The flap 67 and the shaft 69 are provided with a packing 71 for sealing the inner peripheral surface of the casing main body 63 and the casing cap 65 with the flap 67 and the shaft 69.
The packing 71 of 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 that is provided along a surface facing the inner peripheral 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 peripheral surface of the casing 60. Seal part 73.

  (2) An annular first shaft seal portion 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 circumferential surface of the casing cap 65. 75.

  An annular second shaft seal portion 77 that is connected to the other end side of the flap seal portion 73, is provided in the circumferential direction of the shaft 69 on the peripheral surface of the shaft 69, and presses against the bottom portion of the casing body 63.

  (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 peripheral surface of the casing 60.

  The circumferential surface of the shaft 69 on the casing cap 65 side of the casing 60 has a surface that is flush with a surface on which one end side of the flap seal portion 73 of the flap 67 is provided, and has a diameter larger than the diameter of the shaft 69. A single collar 69a is formed. Further, the peripheral surface of the shaft 69 on the bottom side of the casing body 63 of the casing 60 has a surface flush with the surface on which the other end portion side of the flap seal portion 73 of the flap 67 is provided, and the first collar portion 69a. And a second collar portion 69b having a diameter larger than that 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.

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

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

  The first hole 65a of the casing cap 65 of the casing 60 has a diameter smaller than that of the first collar portion 69a and larger than that of the first step portion 69d, and a diameter larger than that of the first step portion 69d. The first small diameter portion 65c is small and has a diameter larger than the diameter of the shaft 69. On the other hand, the second hole 63a at the bottom of the casing main body 63 of the casing 60 is smaller than the second collar portion 69b and larger in diameter than the second step portion 69e, and from the second step portion 69e. The second small diameter portion 63d has a small diameter and a diameter larger than the diameter of the shaft 69.

  In the flap 67, a groove 67 a into which the flap seal portion 73 of the packing 71 is fitted is formed on a surface other than the surface 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.

  Next, as shown in FIGS. 1, 2, and 4, on the inner peripheral surface of the casing main body 63, a first recess that extends from the open surface 63 a toward the bottom 63 e and into which the flap seal portion 73 of the packing 71 is fitted. 101 is formed. The first recess 101 is formed at a position facing the flap seal portion 73 of the packing 71 when the door is fully closed. As shown in FIG. 2, the first indentation 101 is set such that the depth (d) gradually decreases toward the bottom. Further, as shown in FIG. 1, the first indentation 101 is set so that the depth (d) in the circumferential direction gradually becomes shallower as the fully closed door is opened.

  Further, as shown in FIG. 4, a second recess 103 is formed on the inner peripheral surface of the casing main body 63 so as to extend from the open surface 63 a toward the bottom 63 e and into which the flap seal portion 73 of the packing 71 is fitted. The second recess 103 is formed at a position facing the third shaft seal 79 of the packing 71 when the door is fully closed. And like the 1st hollow 101, the 2nd hollow 103 is set so that the depth may become gradually shallow, so that it goes to a bottom part. Further, the second recess 103 is set such that the circumferential depth gradually decreases as the fully closed door is opened.

In the pump 51 having such a configuration, an assembly including the shaft 69 and the flap 67 to which the packing 71 is attached is inserted from the open surface 63 a of the casing body 63.
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. 8 is a cross-sectional view of a constant pressure operated two-way valve. FIG. 8A is a diagram showing a state where the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber is equal to or less than a set value, and FIG. 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. 8A, 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 of the guide hole 203a to the bottom 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. Furthermore, 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 presses against the peripheral surface of the connection portion 207, and the first chamber 203 Between the first chamber 203 and the second chamber 205, and the flow of liquid between the first chamber 203 and the second chamber 205 is blocked.

  The first chamber 203 is provided with a spring 221 around which the shaft 211 is wound, one end abuts against the surface 203b, the other end abuts against the valve body 213, and biases the valve body 213 toward the second chamber 205. It has been. The second chamber 205 is provided with a spring 223 around which the shaft 211 is wound, one end abuts against the surface 205b, the other end abuts against the valve body 213, and biases the valve body 213 toward the first chamber 203. It has been.

  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. 8B 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 first recess 101 and the second recess 103 formed on the inner peripheral surface of the casing main body 63 are set so that the depth (d) gradually decreases toward the bottom.

  When the assembly in which the shaft 69 and the flap 67 to which the packing 71 having the flap seal portion 73 and the third shaft seal portion 79 is attached is inserted into the casing body 63 from the open surface 63a of the casing body 63. By inserting the flap seal portion 73 of the packing 71 along the first recess 101, the assembly is assembled to the casing body 63 while the flap seal portion 73 is gradually elastically deformed while being guided by the first recess 101. It is done. Further, by inserting the third shaft seal portion 79 of the packing 71 along the second recess 103, the assembly is performed while the third shaft seal portion 79 is gradually elastically deformed while being guided by the second recess 103. It is assembled to the casing body 63. Therefore, assembly becomes easy.

  (2) The first recess 101 and the second recess 103 are formed at positions facing the flap seal portion 73 and the third shaft seal portion 79 of the packing 71 when the door is fully closed. In the closed state, the seal between the first chamber 81 and the second chamber 83 is removed. Therefore, when the fully closed door is opened, the portion where the seal is removed becomes a bypass and the force (the force to move) to open the valve body 213 of the constant pressure operated two-way valve 201 which is the valve means is unnecessary or greatly increased. It can be reduced and the opening of the door can be lightened.

  (3) The first indentation 101 and the second indentation 103 are set so that the depth in the circumferential direction of the indentation gradually becomes shallower as the door is opened. The boundary between the first and second recesses 101 and 103 is an obtuse corner. Therefore, when the flap seal portion 73 and the third shaft seal portion 79 are detached from the first recess 101 and the second recess 103, damage to each seal portion due to the corner portion can be reduced. In addition, the flap seal portion 73 and the third shaft seal portion 79 are always pressed against the inner peripheral surface of the casing body 63 except for the door fully closed position.

  (4) The packing 71 is provided along a surface facing the inner peripheral 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 the inner peripheral surface of the casing 60. Are connected to one end side of the flap seal portion 73, are provided in the circumferential direction of the shaft 69 on the peripheral surface of the shaft 69, and are provided on the inner peripheral surface of the casing cap 65 of the casing 60. An annular first shaft seal portion 75 that is in press contact with the other end side of the flap seal portion 73 is provided on the peripheral surface of the shaft 69 in the circumferential direction of the shaft 69, and is pressed against the bottom portion of the casing body 63. An annular second shaft seal portion 77 in contact with 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 a peripheral surface of the shaft 69. It provided along the axial direction of the shaft 69, by consisting of a third shaft sealing portion 79 which presses against the inner peripheral surface of the casing 60, and a packing 71 as integral, good sealing properties.

  The present invention is not limited to the door check device. A casing comprising a hollow casing body filled with a liquid and having a bottom portion and a surface facing the bottom portion being an open surface, and a cap that closes the open surface, the bottom portion facing the casing disposed in the casing, A packing having a shaft rotatably supported by the cap, 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, and a seal portion that presses against the inner peripheral surface of the casing body Can be applied to a pump that is inserted from an open surface of the casing body.

  The positions where the first recess 101 and the second recess 103 are formed may be other than the positions facing the flap seal portion 73 and the third shaft seal portion 79 of the packing 71 when the door is fully closed.

  Furthermore, when providing both the 1st hollow 101 and the 2nd hollow 103, the relationship that the shaft 69 is located on the straight line which connects the 1st hollow 101 and the 2nd hollow 103 is preferable.

Moreover, in the said form example, although the shape of the bottom part of the casing main body 63 was substantially fan shape, it is applicable also to a casing main body with the cross-sectional shape of a bottom part circular.
Furthermore, in the above-described embodiment, the casing cap 65 provided so as to close the open surface 63b of the casing body 63 has a flat plate shape. However, as shown in FIG. 9, it is a bottomed cylindrical casing cap 65 ′. May be. In the figure, a recess 63c ′ is formed on the end surface on the open surface 63b ′ side of the bottomed cylindrical casing body 63 ′, and the end surface on the open surface 65b ′ side of the casing cap 65 ′ is fitted in the recess 63c. A possible convex portion 65c ′ is formed. Further, a first 'recess 102' connected to the first recess 101 'of the casing body 63' is formed on the inner peripheral surface of the casing cap 65 '.

  The shape of the first recess 101 ′ is set so that the depth gradually decreases toward the bottom of the casing body 63 ′, like the first recess 101 of the above-described embodiment. Furthermore, the depth in the circumferential direction is gradually reduced as the fully closed door is opened. The shape of the first 'recess 102 is set such that the depth gradually decreases toward the bottom of the casing cap 65'. Furthermore, the depth in the circumferential direction is gradually reduced as the fully closed door is opened.

  Assembling in this embodiment is performed by inserting an assembly having the same configuration as that of the above embodiment in which the shaft and the flap to which the packing is attached is inserted into the casing main body 63 ′ from the open surface 63b ′, and then the casing cap 65 ′. Assemble.

According to such a configuration, the following effects can be obtained.
(1) When the casing cap 65 ′ is assembled to the casing body 63 ′, the packing flap seal portion is fitted into the first recess 102 ′ of the casing cap 65 ′, thereby reducing damage to the packing flap seal portion. can do.

  (2) The first indentation 101 ′ and the first indentation 102 are formed at positions facing the flap seal portion of the packing when the door is fully closed, so that in the fully closed state, the first chamber And the seal between the second chamber is removed. Therefore, when the fully closed door is opened, the part where the seal is removed becomes a bypass and the force to open the valve body of the constant pressure operated 2-way valve that is the valve means (the force to move) is unnecessary or greatly reduced. , You can lighten the opening of the door.

  (3) The first indentation 101 ′ and the first indentation 102 are set so that the depth in the circumferential direction of the indentation gradually decreases as the door is opened. The boundary between the surface and the first indentation 101 ′ and the first indentation 102 is an obtuse corner. Therefore, when the flap seal portion of the packing is detached from the first recess 101 ′ and the first ′ recess 102, damage to the flap seal portion due to the corner portion can be reduced.

  In this embodiment, when the casing body 63 'and the casing cap 65' are viewed upside down, the casing body 63 'can be viewed as a cap and the casing cap 65' can be viewed as a casing body. Therefore, it is also possible to assemble the casing body 63 ′ after inserting the assembly in which the shaft and the flap 67 to which the packing is attached is inserted into the casing cap 65 ′ from the open surface 65 b ′.

It is a perspective view explaining the invention part of an embodiment. It is sectional drawing in the cutting line CC of FIG. 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. 6 is a cross-sectional view taken along a cutting line AA in FIG. 5. FIG. 7 is a cross-sectional view taken along a cutting line BB in FIG. 6. 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 other examples, Comprising: It is sectional drawing on the plane containing the axis | shaft of the shaft of a casing.

Explanation of symbols

60 Casing 67 Flap 69 Shaft 71 Packing 73 Flap seal 101 First recess

Claims (4)

A casing comprising a hollow casing body filled with a liquid and having a bottom portion and a surface facing the bottom portion being an open surface, and a cap that closes the open surface, the bottom portion facing the casing disposed in the casing, A packing having a shaft rotatably supported by the cap, 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, and a seal portion that presses against the inner peripheral surface of the casing body If the difference between the liquid pressure in the first chamber and the liquid pressure in the second chamber is equal to or less than a set value, the flow of liquid between the first chamber and the second chamber is blocked, and the first chamber Valve means for permitting the flow of liquid between the first chamber and the second chamber when the difference between the liquid pressure of the first chamber and the liquid pressure of the second chamber exceeds a set value, and the shaft and the packing are attached. From the flap That the assembly is inserted from the open face of the casing body,
In the door check device in which the casing is provided on one side of the vehicle body side and the door side, and the shaft is provided on the other side of the vehicle body side and the door side,
On the inner peripheral surface of the casing body,
A door check device, wherein a recess is formed extending from the open surface toward the bottom, and into which the seal portion of the packing is inserted when the assembly is inserted from the open surface of the casing body. The packing is
A flap seal,
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 circumferential surface of the cap 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 circumferential surface of the bottom 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 peripheral surface of the main body,
On the inner peripheral surface of the casing body,
At least one of the first recess into which the flap seal portion is inserted and the second recess into which the third shaft seal portion is inserted is formed extending from the open surface toward the bottom portion. The door check device according to claim 1, wherein At least one of the first and second indentations is
3. The door check device according to claim 2, wherein the door check device is formed at a position facing one of a flap seal portion and a third shaft seal portion of the packing when the door is fully closed. . At least one of the first and second indentations is
The door check device according to claim 2 or 3, wherein the depth of the indentation in the circumferential direction gradually decreases as the door opens.

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