JP2007309377A - Rotary damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable prevention of sudden opening of a door owing to a strong wind etc. <P>SOLUTION: A rotary damper device comprises a main body case 10 having an enclosed working liquid Q inside, a rotary body 20 relatively rotatably installed in the main body case 10 to form a pressure chamber and a non-pressure chamber in front of and behind the rotational direction with a partition part 21 capable of moving along the inner peripheral surface in the main body case 10 for the outer peripheral surface, a passage 30 installed in at least one of the main body case 10 or the rotary body 20 to communicate with the pressure chamber and the non-pressure chamber, and a valve body 40 installed in the passage 30 to close the passage 30 by the working fluid Q when the pressure at the pressure chamber side exceeds a predetermined value. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary damper device used when a door is prevented from opening abruptly due to a strong wind or the like.

  The conventional rotary damper device (Patent Documents 1 and 2) capable of generating a drag force when rotating in one direction opens with a light force when opening the door and slowly closes with a damper effect when closing the door. Can be. However, when opening the door, the door may suddenly open due to a gust of wind or the like. Therefore, there is a demand for a rotary damper device that can normally open the door with a light force and can exhibit a damper effect when the door is suddenly opened due to a gust of wind or the like. However, the above-described conventional rotary damper device cannot satisfy the above requirements.

Japanese Patent No. 2582655 JP 2000-120748 A

  The problem to be solved is that when the door is normally opened, it is opened with a light force, and when the door is suddenly opened due to a gust of wind or the like, the damper cannot be activated.

  The present invention opens the door with a light force, and in order to obtain a damping effect that can reliably prevent the door from opening suddenly due to a gust of wind, etc. A rotating body that is provided in the main body case so as to be relatively rotatable, and that forms a pressure chamber and a non-pressure chamber before and after the rotation direction by a partition portion whose outer peripheral surface is movable along an inner peripheral surface of the main body case; A passage provided in at least one of the case and the rotating body and communicating with the pressure chamber and the non-pressure chamber, and a valve body provided in the passage and closing the passage with a working liquid when the pressure on the pressure chamber side exceeds a predetermined value And a rotary damper device.

  A rotary damper device according to the present invention includes a main body case in which a working liquid is sealed, and a partition portion provided in the main body case so as to be relatively rotatable and having an outer peripheral surface movable along an inner peripheral surface of the main body case. A rotating body that forms a pressure chamber and a non-pressure chamber before and after in the rotational direction, a passage provided in at least one of the main body case or the rotating body, and a passage communicating with the pressure chamber and the non-pressure chamber. When the pressure on the pressure chamber side exceeds a predetermined value, the valve is configured to close the passage with the working liquid. When opening the door, it opens with a light force. The pressure of the working fluid suddenly rises, and this sudden pressure rise causes the valve body to bend and close the passage, preventing the working fluid in the pressure chamber from moving to the non-pressure chamber. Therefore, it is possible to reliably prevent the door from opening suddenly due to a gust of wind, and the safety can be greatly improved.

  1 to 4 show a rotary damper device according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional explanatory view perpendicular to the axis showing the rotary damper device according to Embodiment 1. FIG. FIG. 3 is a sectional explanatory view perpendicular to an axis showing when the valve plate is operated, and FIG. 4 is a sectional explanatory view showing the valve portion.

  The rotary damper device E1 according to the first embodiment of the present invention is an example in which a valve body 40 to be described later is arranged on the rotary body 20, and a main body case 10 in which a working liquid Q is sealed, and the main body case 10 A working liquid chamber A which becomes a pressure chamber and a non-pressure chamber which becomes a pressure chamber before and after the rotation direction by a partition portion 21 which is provided so as to be relatively rotatable and whose outer peripheral surface can move along an inner peripheral surface in the main body case 10. The pressure of the rotating body 20 forming B, the passage 30 provided in the rotating body 20 and communicating with the working liquid chambers A and B, and the pressure on the working liquid chamber A side provided in the passage 30 and serving as the pressure chamber is predetermined. The valve body 40 is configured to close the passage 30 with the working liquid Q when the value is exceeded.

  More specifically, the inner surface of the main body case 10 is formed in a cylindrical shape, and a working liquid Q such as silicon oil is sealed inside.

  The rotating body 20 is inserted into the main body case 10 so as to be relatively rotatable, and the partition portion 21 is provided on the outer surface of the rotating body 20 along the axial direction. As described above, the operation inside the main body case 10 becomes a working liquid chamber A that becomes a pressure chamber on the rotating direction side of the rotating body 20, that is, a non-pressure chamber on the counter rotating direction side. It is partitioned into a liquid chamber B. The top surface 21 a of the projecting partition portion 21 is slidably in contact with the inner peripheral surface of the main body case 10, and the curvature radius thereof is substantially matched with the curvature radius of the inner peripheral surface of the main body case 10. .

  The partition portion 21 includes a valve chamber 31 on the side of the working liquid chamber A and a valve chamber 32 on the side of the working liquid chamber B that constitute the passage 30, and a valve chamber communication passage 33 that connects these valve chambers 31 and 32 to each other. The valve body 40 is inserted into the valve chamber 31, and the valve body 41 is inserted into the valve chamber 32, respectively.

  Here, the valve body 40 will be described. In the first embodiment, as shown in FIG. 2, the valve body 40 is formed by bending the central portion of the leaf spring toward the working liquid chamber A in advance. The passage 30 is configured to be bent by the pressure of the working liquid Q.

  In order to make this configuration easily understandable, in this description, when the door is opened, the door is opened with a light force, and when the door is closed, the damper is operated so that the rotary damper device E1 is slowly closed. The description will be made by taking the case of attaching to as an example.

In FIG. 1, when the door is opened, the rotary body 20 rotates clockwise T to increase the pressure of the working liquid Q in the working liquid chamber A that forms the pressure chamber, and as shown in FIGS. The working fluid Q in the working fluid chamber A by moving the valve bodies 40 and 41 in the opening direction passes through the valve chamber 31-valve chamber communication passage 33-valve chamber 32 to form a non-pressure chamber. Moving. Therefore, the door can be opened with a light force. (See Figure 9)
However, if the door is suddenly opened due to a gust of wind or the like while the door is being opened, the rotational speed of the rotating body 20 rapidly increases, and the partition portion 21 projecting from the rotating body 20 has a pressure chamber. Moves rapidly toward the working liquid chamber A side. Along with this, the pressure of the working liquid Q in the working liquid chamber A also suddenly rises, and the curved valve body 40 is bent into a flat plate shape as shown in FIG. The valve chamber communication passage 33 is pressed against the seat 31a side and the working liquid Q in the working liquid chamber A is prevented from moving to the working liquid chamber B. Therefore, it is possible to reliably prevent the door from opening suddenly due to a gust of wind or the like. (See Figure 9)
Thus, when the door is prevented from opening abruptly and the rotational speed of the rotating body 20 returns to the normal speed, the pressure of the working liquid Q in the working liquid chamber A is lowered accordingly, and the valve The shape of the body 40 also returns to the original shape, and the working liquid Q in the working liquid chamber A moves to the working liquid chamber B through the valve chamber 31 -valve chamber communication path 33 -valve chamber 32. Therefore, the door can be opened with a normal light force. (See Figure 9)
As shown in FIG. 2, the valve body 40 has a central portion curved in advance toward the working liquid chamber A, and the curved state is imparted with spring rigidity to such an extent that the curved state is not bent and deformed under a normal load. ing.

  Here, the normal load means that the working liquid Q in the working liquid chamber A moves to the working liquid chamber B through the valve chamber 31-valve chamber communication passage 33-valve chamber 32 as described above. The load is such that the door can be opened with a light force. Therefore, even if the valve body 40 is bent and flattened by the pressure increase of the working liquid Q in the working liquid chamber A due to a gust or the like, the valve body 40 is automatically restored when the pressure is normalized.

  How much wind force causes the valve body 40 to be bent is designed according to the needs, but may be designed in consideration of the material of the leaf spring, the leaf thickness of the leaf spring, the initial curved amount, and the like.

In the first embodiment, as shown in FIG. 2, the valve body 40 has a central portion curved in advance toward the working liquid chamber A, but this may be formed in a wave shape. 40 should just be comprised so that it may bend and function as a cutoff valve if the pressure of the working liquid Q exceeds the allowable range while maintaining a curved state under a normal load and allowing the working liquid Q to pass.

When the door is closed, in FIG. 1, the rotating body 20 rotates counterclockwise R, and the partition portion 21 protruding from the rotating body 20 moves to the working liquid chamber (A) side forming the pressure chamber. To do. Along with this, the pressure of the working liquid Q in the working liquid chamber (A) rises, and the valve body 41 moves to the valve seat 32a side of the valve chamber communication passage 33 as shown in FIG. And the valve chamber communication passage 33 is closed, the working liquid Q in the working liquid chamber (A) is prevented from moving to the working liquid chamber (B), and a good damper effect can be obtained. . (See Figure 9)
As shown in FIG. 2 in the first embodiment, the valve body 41 is formed by bending the central portion in advance toward the working liquid chamber (A) as in the valve body 40 described above. Spring rigidity is applied so that the deformed state does not deform under normal load.

Therefore, when the speed at which the door closes due to gusts or the like exceeds a predetermined speed, the rotational speed of the rotating body 20 increases, and the pressure of the working liquid Q in the working liquid chamber (A) increases accordingly. The bent valve body 41 is bent into a flat plate shape (not shown) by this pressure increase, and is pressed against the valve seat 32a side to close the valve chamber communication passage 33 more strongly, and the operation in the working liquid chamber (A) is performed. The liquid Q is prevented from moving to the working liquid chamber (B). Therefore, it is possible to reliably prevent the door from closing suddenly due to a gust of wind or the like. (See Figure 9)
As described above, when the door is prevented from closing suddenly and the rotational speed of the rotating body 20 returns to the normal speed, the pressure of the working liquid Q in the working liquid chamber (A) decreases accordingly. The shape of the valve body 41 is also restored to the original shape, and the working liquid Q in the working liquid chamber (A) passes through the curved gap of the valve body 41 to form the valve chamber 32 -valve chamber communication path 33 -valve chamber. It passes through 31 and moves to the working liquid chamber (B). Therefore, the door can be closed at a normal speed. (See Figure 9)
In the figure, 34 is a holding member for the valve body 40, 35 is a holding member for the valve body 41, 22 is a holding member for the rotating body 20, 11 is a 0-ring, 12 is a mounting nut, and the flange 20F side of the rotating body 20 Is attached to the opening side of the case body 10.
(Modification of Example 1)
5 and 6 show a rotary damper device that is a modification of the first embodiment of the present invention, FIG. 5 is a cross-sectional explanatory view orthogonal to the axis showing the rotary damper device that is a modification, and FIG. It is sectional explanatory drawing which shows a valve part same as the above.

  The rotary damper device E2 according to the modification of the first embodiment of the present invention is the same in structure and effect as the rotary damper device E1 according to the first embodiment, and detailed description thereof is omitted. Only will be described.

  In the rotary damper device E2 which is a modification of the first embodiment, the valve element 42 is a flat valve element as shown in FIG. 6 in this modification. Similar to the valve body 41 described above, the valve body 42 is a valve body that can operate when the door is closed to obtain a damper effect.

  That is, when the door is closed, in FIG. 5, the rotating body 20 rotates counterclockwise R, and the partition portion 21 protruding from the rotating body 20 moves toward the working liquid chamber (A) forming the pressure chamber. Moving. Along with this, the pressure of the working liquid Q in the working liquid chamber (A) rises, and the valve body 42 moves to the valve seat 32a side of the valve chamber communication passage 33 as shown in FIG. And the valve chamber communication passage 33 is closed, the working liquid Q in the working liquid chamber (A) is prevented from moving to the working liquid chamber (B), and a good damper effect can be obtained. .

In the case of this modification, since the valve body 42 is configured in a flat plate shape, a stronger damper effect can be obtained from the beginning of the door closing operation compared to the rotary damper device E1 of the first embodiment described above. it can. (See Figure 10)
In the figure, 34 is a holding member for the valve body 40, 35 is a holding member for the valve body 41, 11 is a 0 ring, 12 is a mounting nut, and the flange 20F side of the rotating body 20 is on the opening side of the case body 10. Install.

  7 and 8 show a rotary damper device according to a second embodiment of the present invention. FIG. 7 is a cross-sectional explanatory view perpendicular to the axis showing the rotary damper device according to the second embodiment. FIG. It is sectional explanatory drawing which shows a part.

  The rotary damper device E3 according to the second embodiment of the present invention is similar in structure and effect to the rotary damper device E1 according to the first embodiment described above, and therefore detailed description thereof is omitted, and only differences are described. explain.

  The rotary damper device E3 according to the second embodiment is structurally different from the rotary damper device E1 according to the first embodiment in that the passage 30 provided with the valve structure is arranged on the main body case 10 side, as is apparent from FIG. This is the point.

  That is, the rotary damper device E3 according to the second embodiment includes a main body case 10 in which a working liquid Q is sealed, and a main body case 10 that is provided to be rotatable relative to the inner peripheral surface of the main body case 10. A rotating body 20 that forms a working liquid chamber A serving as a pressure chamber and a working liquid chamber B serving as a non-pressure chamber before and after the rotation direction by a partition portion 21 whose surface can move along, and provided in the main body case 10. A passage 30 communicating with the working liquid chambers A and B, and a valve body 40 that is provided in the passage 30 and closes the passage 30 with the working liquid Q when the pressure on the working liquid chamber A side serving as the pressure chamber exceeds a predetermined value. It consists of and.

  More specifically, as shown in FIGS. 7 and 8, the passage 30 communicating with the working liquid chambers A and B of the main body case 10 is connected to the valve chamber 31 on the side of the working liquid chamber A constituting the part of the passage 30 and the operation. A valve chamber 32 on the liquid chamber B side and a valve chamber communication passage 33 that connects these valve chambers 31 and 32 to each other are formed, and the valve body 40 is formed in the valve chamber 31. Valve bodies 41 are respectively inserted.

  The valve chamber 31, the valve chamber 32, the valve chamber communication passage 33, the valve body 40, and the valve body 41 are formed into a block 50 as a part of the passage 30 having a valve structure, as shown in FIG. Is detachably mounted on the side wall 10a.

In addition, since the structure and effect of the said valve chamber 31, the valve chamber 32, the valve chamber communication path 33, the valve body 40, and the valve body 41 are the same as that of Example 1 detailed, detailed description is abbreviate | omitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory cross-sectional view perpendicular to an axis showing a rotary damper device according to Embodiment 1 of the present invention. It is sectional explanatory drawing which shows a valve part same as the above. It is sectional explanatory drawing orthogonal to the axis line which shows the time of valve plate operation same as the above. It is sectional explanatory drawing which shows a valve part same as the above. It is sectional explanatory drawing orthogonal to the axis line which shows the rotary damper apparatus which consists of a modification of Example 1 of this invention. It is sectional explanatory drawing which shows a valve part same as the above. It is sectional explanatory drawing orthogonal to the axis line which shows the rotary damper apparatus which consists of Example 2 of this invention. It is sectional explanatory drawing which shows a valve part same as the above. It is a figure which shows the torque diagram of the rotary damper apparatus shown in FIG. It is a figure which shows the torque diagram of the rotary damper apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main body case 20 Rotating body 21 Partition part 30 Passage 40 Valve body A Working fluid chamber used as a pressure chamber B Working fluid chamber used as a non-pressure chamber

Claims (4)

A body case enclosing a working liquid inside,
A rotating body that is provided in the main body case so as to be relatively rotatable, and that forms a pressure chamber and a non-pressure chamber in front and rear in the rotation direction by a partition portion whose outer peripheral surface is movable along the inner peripheral surface of the main body case;
A passage provided in at least one of the main body case or the rotating body and communicating with the pressure chamber and the non-pressure chamber;
A valve body provided in the passage and closing the passage by a working liquid when the pressure on the pressure chamber side exceeds a predetermined value;
A rotary damper device comprising: The rotary damper device according to claim 1,
The valve body is configured by bending a leaf spring, and is bent by the pressure of the working liquid on the pressure chamber side to close the passage. The rotary damper device according to claim 1 or 2,
A rotary damper device comprising a pair of the valve bodies in a reciprocating rotation direction of the rotary body. A rotary damper device according to claim 3,
A rotary damper device characterized in that a spring constant or a bending allowance of the pair of valve bodies is made different.

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