JP5093250B2 - Damper and hinge mechanism with damper for automobile door using the same - Google Patents

Description

  The present invention relates to a damper suitable for use in a hinge mechanism of a rotary member that reciprocally rotates such as a door, a rotary window, and a document table cover of a copying machine.

  As dampers, those using rubber, coil springs, air, viscous bodies, etc. are known, and such dampers absorb rotational energy and give appropriate attenuation to the rotation of the rotating member, so as to reduce the impact. I have to.

: Japanese Patent No. 3434770 : JP 2003-130115 A

  By the way, many dampers are designed to give a constant resistance (damping force) at any rotation angle in the rotation of the rotating member. When a large rotational force is applied to this, the rotating member is vigorously rotated without resisting this large rotational force, causing a collision with the stopper or the like. If the damper is configured so that a large rotational resistance force is generated by applying such a large rotational force, it becomes difficult to rotate the rotational member when necessary, and the rotational member can be rotated only with a large force. Becomes extremely bad.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to provide a stopper or the like even when a large rotational force is suddenly applied to the rotating member by a strong wind or an unintentional large human force. In addition to being able to avoid crashing into the vehicle, the operability can be improved, and the damper can be made compact and can be applied to a narrow space around the hinge mechanism of the side door for the front seat of an automobile. An object is to provide a hinge mechanism with a damper for an automobile door.

  The damper according to the present invention includes a container, a shaft member rotatable relative to the container, and a flow accommodated in the container so as to provide resistance to relative rotation of the shaft member with respect to the container. Body and resistance force increasing means for temporarily increasing the resistance force given to the relative rotation of the shaft member relative to the container by the fluid during the relative rotation of the shaft member relative to the container. .

  According to the damper of the present invention, since the resistance force temporarily increases during the relative rotation of the shaft member, the rotation of the rotating member due to strong wind or an unintentional large human force is halfway. In addition, since the increase of the resistance force is temporary, the rotating member can be rotated with a small rotational force in a range where the increase of the resistance force does not occur, while the unconsciously imparting a large rotational force to the rotating member. A warning can be given, so that a collision with a stopper or the like can be avoided and operability can be improved.

  The damper of the present invention is used, for example, in a hinge mechanism of a side door for a front seat of an automobile to buffer the opening and closing of the side door. In this case, the shaft member is rotated relative to the vehicle body with the opening and closing of the side door. Alternatively, the container may be installed in the hinge mechanism so that the container is rotated with respect to the vehicle body when the side door is opened and closed. The relative rotation refers to rotation with respect to the container, and includes a case where the container is rotated while the shaft member is fixed so as not to rotate.

  In the present invention, the resistance increasing means determines the passage diameter of the passage for flowing the fluid between the two chambers in the container in the relative rotation of the shaft member with respect to the container according to the relative rotation angle of the shaft member with respect to the container. However, instead of or together with this, there is a passage for flowing the fluid between the two chambers in the container in the relative rotation of the shaft member with respect to the container. In addition, in the relative rotation of the shaft member with respect to the container, the increase / decrease rate of the fluid housing volume of the two chambers may be increased to increase the resistance force.

  In the damper according to the present invention, the container includes a cylindrical portion having a hollow portion for accommodating the fluid and an internal thread formed on the inner peripheral surface, and the shaft member includes the hollow portion of the cylindrical portion in two chambers. And a partition portion having a male threaded portion that is threadedly engaged with the female threaded portion on the inner peripheral surface of the cylindrical portion, and the resistance increasing means is configured to form a partial screw notch portion on the female threaded portion. Extending in the direction and extending in the axial direction so as to form a partial screw notch on the male threaded portion and provided on the outer peripheral surface of the partitioning portion. An outer peripheral surface groove portion, and the inner peripheral surface groove portion communicates with one of the two chambers at one end portion in the axial direction, and the outer peripheral surface groove portion is one end portion in the axial direction. In communication with the other of the two chambers and the relative rotation of the shaft member relative to the container is small. In one rotation region, the other end of the inner peripheral surface groove is confronted and communicated with the other end at the other end, while the other end to the other end of the inner peripheral groove in the rotation region other than the at least one rotation region. In this case, the resistance-increasing means includes an inner circumferential groove disposed in each of at least two rotation regions that are separated from each other in the rotation direction. The outer peripheral surface groove portion communicates with the other end portion of the corresponding inner peripheral surface groove portion facing and communicating with the other end portion of the corresponding inner peripheral surface groove portion in each of at least two rotation regions in the relative rotation of the shaft member with respect to the housing body. In addition to including the rotation area between the rotation areas, the face-to-face communication of the other end to the other end of the inner circumferential groove is canceled in a rotation area other than the at least two rotation areas. The resistance increasing means An outer peripheral surface groove portion disposed in each of the at least two rotation regions, and the inner peripheral surface groove portion has a corresponding outer periphery in each of the at least two rotation regions in the relative rotation of the shaft member with respect to the container. The other end portion of the surface groove portion is confronted and communicated with the other end portion, and includes a rotation region between the at least two rotation regions and to the other end portion of the outer peripheral surface groove portion in a rotation region other than the at least two rotation regions. The other end portion of the inner surface of the outer circumferential surface groove portion may be released. Preferably, in the former case, the outer circumferential surface groove portion is the width of the inner circumferential surface groove portion in the relative rotation direction of the shaft member with respect to the container. In the latter case, the inner peripheral surface groove portion has a width narrower than the width of the outer peripheral surface groove portion in the relative rotation direction of the shaft member with respect to the container. According to the damper, it can be made small and It can also be applied to a narrow space around the hinge mechanism of the side door for the front seat of a moving vehicle.

  In the damper according to the present invention, the container includes one lid portion fixed to one end portion in the axial direction of the cylindrical portion and the other lid portion fixed to the other end portion in the axial direction of the cylindrical portion. The shaft member includes one shaft portion that passes through one lid portion and is fixed to the partition portion, and the other shaft that passes through the other lid portion and is fixed to the partition portion. May be included.

  In the damper according to the present invention, the container includes a hollow part that accommodates the fluid and a cylindrical part having a recess or a protrusion extending in the axial direction on the inner peripheral surface, and the shaft member includes the hollow part. The shaft member is penetrated and supported relatively rotatably by the container, and the resistance increasing means divides the hollow portion of the cylindrical portion into two chambers and is movable in the axial direction so as to surround the shaft member. A movable member mounted on the shaft member, a guide groove provided on the outer peripheral surface of the shaft member, and an engaging member which is locked to the movable member on the one hand and movably disposed on the guide groove on the other hand. The movable member has a protrusion or a recess that is fitted to the recess or protrusion of the cylindrical portion on the outer peripheral surface so as to be movable in the axial direction. A small inclination guide groove with a given small inclination angle and the small inclination guide groove Both may include at least a large inclination angle guide groove portion having an inclination angle larger than the inclination angle of the small inclination angle guide groove portion with respect to the axial direction. In this case, the engaging member is rotatable on the movable member. It is preferable that a spherical body that is locked is provided, and such a damper can be reduced in size and can be applied to a narrow space around a hinge mechanism of a side door for a front seat of an automobile.

  The fluid preferably contains oil such as silicone oil, a viscous material or a viscoelastic material, and particularly preferably contains a silicone-based unvulcanized rubber having a plasticity of 60 to 320 or less.

  A hinge mechanism with a damper for an automobile door according to the present invention is a hinge mechanism that includes the damper according to any one of the above aspects and that rotatably supports a rotary door of an automobile. The shaft member is fixed to one of the revolving door and the vehicle body, and the shaft member is fixed to the other of the revolving door and the vehicle body.

  According to the hinge mechanism with a damper for automobile doors of the present invention, since the resistance force is temporarily increased during the relative rotation of the shaft member, strong wind, unintentional large person's The door can be prevented from rotating due to force, and the increase in resistance is temporary, so the door can be rotated with a small rotational force in the range where resistance does not increase, while the door is unconsciously large. A warning can be given to the application of the rotational force, so that a collision with the stopper or the like can be avoided and operability can be improved.

  In the hinge mechanism with a damper for an automobile door according to the present invention, even if the shaft member is rotated with respect to the vehicle body along with the opening and closing of the side door, instead, the housing body is opened and closed with respect to the vehicle body with the opening and closing of the side door. Therefore, in the hinge mechanism with a damper for an automobile door according to the present invention, the relative rotation of the shaft member is rotation with respect to the container, and the container is rotated. This includes the case where the shaft member is fixed so as not to rotate.

  According to the present invention, even if a large rotational force is suddenly applied to the rotating member by a strong wind or an unintentional large human force, it is possible to avoid a collision with a stopper or the like and improve operability. In addition, it is possible to provide a damper that can be made compact and can be applied to a narrow space around a hinge mechanism of a side door for a front seat of an automobile, and a hinge mechanism with a damper for an automobile door using the damper.

FIG. 1 is a cross-sectional explanatory view of a preferred example of an embodiment of the present invention. FIG. 2 is a cross-sectional explanatory view from the back side in which a part of the example shown in FIG. 3 is a cross-sectional explanatory view taken along the line III-III of the example shown in FIG. FIG. 4 is an operation explanatory diagram of the example shown in FIG. FIG. 5 is an operation explanatory diagram of the example shown in FIG. FIG. 6 is an operation explanatory diagram of the example shown in FIG. FIG. 7 is a cross-sectional explanatory view of another preferred example of the embodiment of the present invention. 8 is a cross-sectional explanatory view taken along the line VIII-VIII of the example shown in FIG. FIG. 9 is a development view of the guide groove of the example shown in FIG. FIG. 10 is an operation explanatory diagram of the example shown in FIG. FIG. 11 is an explanatory diagram in which the example shown in FIG. 1 is used for the hinge mechanism. 12 is an explanatory plan view of the hinge mechanism of FIG. FIG. 13 is an operation explanatory view of the hinge mechanism of FIG. FIG. 14 is an explanatory diagram in which the example shown in FIG. 7 is used for the hinge mechanism.

  Next, the present invention and its embodiments will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.

  1 to 3, the damper 1 of this example includes a housing 2, a shaft member 4 that is relatively rotatable in the A direction around the shaft center 3 with respect to the housing 2, and a shaft for the housing 2. In order to give a resistance to the relative rotation of the member 4 in the direction A, a fluid 5 disposed in the container 2 and made of oil such as silicone oil, a viscous material or a viscoelastic material, and the fluid 5 The resistance force increasing means 6 temporarily increases the resistance force given to the rotation of the shaft member 4 relative to the container 2 in the direction A by the midway of the rotation of the shaft member 4 relative to the container 2 in the direction of the A. It is equipped with.

  The container 2 having a substantially hexagonal cylindrical outer peripheral surface 10 includes a cylindrical portion 14 having a cylindrical hollow portion 11 for accommodating the fluid 5 and having a female screw 13 formed on the cylindrical inner peripheral surface 12; A cylindrical lid portion 17 fixed to one end portion 15 in the axial direction of the cylindrical portion 14, that is, the B direction via a threaded portion 16, and a second end portion 18 in the B direction of the cylindrical portion 14 are screwed together. And a cylindrical lid 20 fixed through a portion 19.

  The shaft member 4 divides the hollow portion 11 of the cylindrical portion 14 into two chambers 25 and 26 and has a male screw portion 27 on the cylindrical outer peripheral surface 28 that is screwed into the female screw portion 13 of the inner peripheral surface 12 of the cylindrical portion 14. The cylindrical partition part 29, the shaft part 30 penetrating the lid part 17 and fixed to the partition part 29, and the columnar shaft penetrating the lid part 20 and fixed to the partition part 29 The shaft portion 30 is integrally fixed to the partition portion 29 and has a smaller diameter column portion 32 than the partition portion 29 and a hexagonal column portion integrally formed with the column portion 32. 33 in an integrated manner.

  Between the cylindrical portion 32 and the lid portion 17, an annular seal member 35 for preventing the fluid 5 from leaking, and a shaft member for the container 2 in addition to the relative smooth rotation of the shaft member 4 in the A direction. 4 is disposed between the shaft portion 31 having a smaller diameter than the partition portion 29 and the lid portion 20. An annular seal member 37 that prevents the shaft member 4 and a bushing bush 38 that secures a relative smooth movement in the B direction of the shaft member 4 relative to the container 2 in addition to a relatively smooth rotation in the A direction of the shaft member 4. An annular seal member 39 that prevents leakage of the fluid 5 is disposed between the cylinder portion 14 and the lid portions 17 and 20.

  The resistance-increasing means 6 extends in the B direction so as to form two partial screw notches 41 and 42 that are spaced apart from each other in the A direction in the female screw portion 13 and is provided on the inner peripheral surface 12 of the cylindrical portion 14. And two outer peripheral surface groove portions 43 and 44 and an outer peripheral surface groove portion 46 extending in the B direction so as to form a partial screw notch portion 45 in the male screw portion 27 and provided on the outer peripheral surface 28 of the partition portion 29. Each of the inner peripheral surface groove portions 43 and 44 communicates with the chamber 25 at one end portion in the B direction, and the outer peripheral surface groove portion 46 communicates with the chamber 26 at one end portion in the B direction. The other end portions of the corresponding inner peripheral surface groove portions 43 and 44 communicate with each other at the other end portions in the two rotation regions α1 and α2 in the rotation of the shaft member 4 relative to the container 2 in the A direction. On the other hand, the rotation region α3 between the two rotation regions α1 and α2 In addition, the communication between the other end portions of the inner peripheral surface groove portions 43 and 44 to the other end portions is released in a rotation region other than the two rotation regions α1 and α2.

  In the inner peripheral surface groove portions 43 and 44 disposed in the two rotation regions α1 and α2 that are separated from each other in the A direction, the inner peripheral surface groove portion 43 has a width in the A direction having a central angle corresponding to the rotation region α1. The inner peripheral surface groove portion 44 that is separated from the inner peripheral surface groove portion 43 with a central angle corresponding to the rotation region α3 in the A direction has a width in the A direction having a central angle corresponding to the rotation region α2. The outer peripheral surface groove 46 has a width in the A direction that is smaller than the width of the inner peripheral surface grooves 43 and 44 in the A direction. Thus, the outer peripheral surface groove 46 is a shaft member for the container 2. 4 has a narrower angle range than each of the inner peripheral surface groove portions 43 and 44 with respect to the rotation angle in the relative rotation in the A direction.

  The separation width in the A direction between the inner circumferential groove portion 43 and the inner circumferential groove portion 44 corresponding to the rotation region α3 may be the same as or larger than the width in the A direction of the inner circumferential groove portions 43 and 44. When the damper 1 is used for the hinge mechanism of the side door, the width of the inner peripheral surface groove portions 43 and 44 in the A direction is such that an increase in the resistance force in the rotation region α3 is not noticeable when the side door is normally opened and closed. It may be smaller.

  The damper 1 described above includes, for example, the housing 2 fixed to the vehicle body side, while the hexagonal column portion 33 of the shaft member 4 is fixed to the rotating side door side of the vehicle. In this case, the damper 1 is arranged so that the outer peripheral surface groove 46 is located outside the rotation region α1 and in the vicinity of the rotation region α1 as shown in FIG. 4 when the side door is closed. Attached to the hinge mechanism. In this state, when the shaft member 4 is rotated in the A direction by the initial opening of the side door, the volume of the chamber 25 is increased by the male screw portion 27 and the female screw 13 that are screwed together, while the volume of the chamber 26 is reduced. Thus, the shaft member 4 is moved in the B direction so that the fluid 5 in the chamber 26 flows into the chamber 25 through a passage having a small passage diameter and a gap between the female screw portion 13 and the male screw portion 27. A relatively large resistance in this flow is given to the shaft member 4 at the initial opening of the side door.

  When the side door is further rotated to open against the relatively large resistance after the initial opening of the side door and the outer peripheral surface groove 46 is positioned in the rotation region α1 as shown in FIG. As a result of the other end portion of the inner circumferential surface groove portion 43 facing and communicating with the other end portion of the inner peripheral surface groove portion 43, the fluid 5 of the chamber 26 whose volume is reduced is a passage formed by a gap between the female screw portion 13 and the male screw portion 27. In addition to this, it flows into the chamber 25 through an additional passage formed by the outer peripheral groove portion 46 and the inner peripheral groove portion 43 that communicate with each other at the other end, and the reduced resistance in this flow follows the initial opening of the side door. The shaft member 4 is given open.

  When the side door is further rotated to open against the reduced low resistance and the outer peripheral groove 46 is located in the rotation region α3 as shown in FIG. 3, the other end of the inner peripheral groove 43 is provided. As a result of the release of the facing communication at the other end portion of the outer peripheral surface groove portion 46, the fluid 5 of the chamber 26 whose volume is reduced again passes through only the passage formed by the gap between the female screw portion 13 and the male screw portion 27. To the chamber 25 and an increased relatively large resistance in this flow is imparted to the shaft member 4 with further opening of the side door. Thus, the resistance increasing means 6 flows the fluid 5 between the two chambers 25 and 26 in the container 2 that accommodates the fluid 5 in the rotation of the shaft member 4 relative to the container 2 in the direction A. A passage formed by a gap between the female screw portion 13 and the male screw portion 27, and an additional passage formed by an outer peripheral groove portion 46 and an inner peripheral groove portion 43 that communicate with each other at the other end in addition to this passage. A passage formed by a gap between the female screw portion 13 and the male screw portion 27, ie, the passage diameter of the passage is reduced according to the relative rotation angle of the shaft member 4 with respect to the container 2 in the A direction. And a gap between the female threaded portion 13 and the male threaded portion 27 from the total passage diameter of the outer diameter groove portion 46 and the outer diameter groove portion 43 that communicate with each other at the other end. Resistance force applied to the shaft member 4 by reducing only the passage diameter of the passage. And it is adapted to increase.

  When the side door is further rotated to open against the increased resistance and the outer peripheral groove 46 is located in the rotation region α2 as shown in FIG. 6, the outer periphery is the same as in the rotation region α1. As a result of the other end portion of the surface groove portion 46 communicating with the other end portion of the inner peripheral surface groove portion 44, the fluid 5 in the chamber 26 whose volume is further reduced is formed between the female screw portion 13 and the male screw portion 27. In addition to the passage formed by the gap, the fluid flows into the chamber 25 through an additional passage formed by the outer peripheral surface groove portion 46 and the inner peripheral surface groove portion 44 that communicate with each other at the other end portion. It is given to the shaft member 4 with further opening.

  Finally, when the outer peripheral surface groove portion 46 is located outside the rotation region α2 and in the vicinity of the rotation region α2, the outer peripheral surface groove portion 46 to the other end portion of the inner peripheral surface groove portion 44 is the same as when positioned in the rotation region α3. As a result, the fluid 5 in the chamber 26 whose volume is reduced flows again into the chamber 25 through only the passage formed by the gap between the female screw portion 13 and the male screw portion 27. The increased resistance in this flow is imparted to the shaft member 4 with further opening of the side door. In this state, the stopper works against the opening of the side door to prevent further rotation of the side door in the opening direction.

  When the side door is closed, the damper 1 performs the reverse operation, and when the outer peripheral surface groove 46 is located outside the rotation region α2 and in the vicinity of the rotation region α2 with respect to the side door closing. Relatively large resistance, reduced resistance when the outer peripheral groove 46 is located in the rotation region α2, relatively increased resistance when the outer peripheral groove 46 is located in the rotation region α3, outer peripheral groove 46 Is provided in the rotation region α1, and a relatively large increased resistance is provided when the outer circumferential groove 46 is located outside the rotation region α1 and in the vicinity of the rotation region α1. . In closing the side door, when the outer peripheral surface groove 46 is located outside the rotation region α1 and in the vicinity of the rotation region α1, a stopper works to close the side door and further rotation in the closing direction of the side door occurs. Be blocked.

  According to such a damper 1, since the resistance force temporarily increases in the rotation region α <b> 3 in the middle of the relative rotation of the shaft member 4 in the A direction, a strong wind, an unintentional large person The side door can be prevented from rotating due to this force, and the increase in the resistance force is temporary. Therefore, in the rotation regions α1 and α2 where the increase in the resistance force does not occur, the side door can be rotated with a small rotation force. While being able to rotate, a warning can be given to the unintentional application of a large rotational force to the side door, thus avoiding a collision with a stopper, etc., and improving operability. Since the resistance increasing means 6 is disposed in the container 2, it can be made compact and can be applied to a narrow space around the hinge mechanism of the side door for the front seat of the automobile without any problem.

  In the damper 1, the two inner peripheral surface groove portions 43 and 44 are provided on the inner peripheral surface 12 of the cylindrical portion 14, but instead of this, two outer peripheral surface groove portions similar to the inner peripheral surface groove portions 43 and 44 are provided as partitioning portions. On the other hand, the inner peripheral surface groove portion similar to the outer peripheral surface groove portion 46 may be provided on the inner peripheral surface 12 of the cylindrical portion 14.

  Further, the resistance increasing means 6 of the damper 1 is configured such that the fluid between the two chambers 25 and 26 in the container 2 that accommodates the fluid 5 in the rotation of the shaft member 4 relative to the container 2 in the A direction. 7 is decreased in accordance with the relative rotation angle of the shaft member 4 with respect to the container 2 in the direction A to increase the resistance force. 9 to increase the rate of increase / decrease of the fluid accommodation volume of the two chambers 54 and 55 in the rotation in the A direction around the axial center 3 of the shaft member 53 with respect to the accommodation body 52 as in the damper 51 shown in FIG. The resistance may be increased.

  That is, the damper 51 shown in FIGS. 7 to 9 includes a housing 52, a shaft member 53 that is rotatable in the A direction around the shaft center 3 relative to the housing 52, and a shaft member for the housing 52. In order to give resistance to the relative rotation of the A in the A direction, the fluid 5 disposed in the container 52 and the rotation of the shaft member 53 with respect to the container 52 by the fluid 5 are given to the rotation in the A direction. Resistance force increasing means 56 for temporarily increasing the resistance force generated in the middle of the rotation of the shaft member 53 relative to the container 52 in the A direction.

  The container 52 having a substantially octagonal cylindrical outer peripheral surface 60 has a stepped cylindrical hollow portion 61 for storing the fluid 5 and a cylindrical inner peripheral surface 63 with an annular stopper surface 62. The cylindrical portion 64, the cylindrical lid portion 67 fixed to the one end portion 65 in the axial direction of the cylindrical portion 64, that is, the B direction via the threaded portion 66, and the other end of the cylindrical portion 64 in the B direction. And a bottomed cylindrical lid portion 70 fixed to the portion 68 via a screwing portion 69.

  The inner peripheral surface 63 of the cylindrical portion 64 has a large-diameter inner peripheral surface portion 71 and a small-diameter inner peripheral surface portion 72 that are arranged with the stopper surface 62 therebetween, and the inner peripheral surface portion 72 extends in the B direction. A plurality of recesses 73 having an arcuate cross section and extending at equal intervals in the A direction are provided.

  The shaft member 53 includes a cylindrical large-diameter shaft portion 75 penetrating the hollow portion 61, and a cylindrical small-diameter shaft portion fixed to one end surface of the large-diameter shaft portion 75 and penetrating the lid portion 67. 76, a cylindrical small diameter shaft portion 77 fixed to the other end surface of the large diameter shaft portion 75, and a hexagonal column portion 78 fixed to the small diameter shaft portion 76 are integrally provided.

  Between the small-diameter shaft portion 76 and the lid portion 67, an annular seal member 35 that prevents leakage of the fluid 5, and a bushing bush 36 that ensures relative smooth rotation in the A direction of the shaft member 53, Between the small-diameter shaft portion 77 and the lid portion 70, a hooked bush 38 that secures relative smooth rotation in the A direction of the shaft member 53 is disposed, and the large-diameter shaft portion Washers 79 are disposed between one annular end surface of 75 and the flange portion of the flanged bush 36, and between the other annular end surface of the large diameter shaft portion 75 and the flange portion of the flanged bush 38, respectively. Between the cylinder part 64 and the cover parts 67 and 70, the cyclic | annular sealing member 39 which prevents the leakage of the fluid 5 is each arrange | positioned.

  The shaft member 53 is rotatably supported in the A direction by the small diameter shaft portion 76 via the hooked bush 36 and relatively by the small diameter shaft portion 77 by the lid portion 70 via the hooked bush 38. On the other hand, it cannot move in the B direction relative to the container 52.

  The resistance increasing means 56 divides the hollow portion 61 of the cylindrical portion 64 into two chambers 54 and 55 and surrounds the large diameter shaft portion 75 of the shaft member 53 so as to be movable in the B direction so as to be movable in the B direction. The movable member 81 mounted on the portion 75, the guide groove 83 provided on the outer peripheral surface 82 of the large-diameter shaft portion 75 of the shaft member 53, and on the one hand, locked to the movable member 81 and on the other hand the guide groove In the container 52 that accommodates the fluid 5 by the movement in the B direction of the movable member 81 in the rotation of the shaft member 53 relative to the container 52 and the engagement member 84 that is movably disposed in the 83. And a passage 85 for allowing the fluid 5 to flow between the two chambers 54 and 55.

  The movable member 81 includes a cylindrical portion 86, an annular flange 87 that is integrally formed with one end portion of the cylindrical portion 86 and abuts against the stopper surface 62, and a cylindrical portion 64 on the outer peripheral surface 88 of the cylindrical portion 86. Each of the recesses 73 has a plurality of protrusions 89 that are movably fitted in the B direction. The movable member 81 cannot be rotated in the A direction relative to the container 52 by fitting the recesses 73 of the plurality of protrusions 89 to each of the recesses 73.

  The flange portion 87 includes an outer peripheral surface 90 that comes into contact with the inner peripheral surface portion 71 of the cylindrical portion 64 so as to be movable in the B direction, and a groove 91 provided on the outer peripheral surface 90. The annular space 92 formed by and communicates with the chamber 55 through the groove 91.

  The guide groove 83 is continuous with the two large inclination angle guide groove portions 95 and 96 having a given inclination angle β1 with respect to the B direction, and the large inclination angle guide groove portions 95 and 96, and with respect to the B direction. And three small inclination angle guide groove portions 97, 98 and 99 having an inclination angle β2 smaller than the inclination angle β1 of the large inclination angle guide groove portions 95 and 96.

  The engaging member 84 is engaged with the spherical body holding member 101 fitted to the cylindrical portion 86, and on one side is rotatably held by the spherical body holding member 101 and is locked to the cylindrical portion 86, and on the other hand, the guiding groove 83. And a sphere 102 made of a steel ball arranged to be movable and rotatable.

  The engaging member 84 is movable in the B direction as the sphere 102 is guided along the guide groove 83 and moved in the B direction by the rotation of the shaft member 53 relative to the container 52 in the A direction. The movement in the direction B corresponding to the shape of the guide groove 83 transmitted to the member 81 is caused in the movable member 81.

  A passage 85 communicating with the chamber 54 at one end and the chamber 55 at the other end is formed by an annular gap 106 between the outer peripheral surface 82 of the large diameter shaft portion 75 and the cylindrical inner peripheral surface 105 of the cylindrical portion 86. The passage 85 may include a through hole formed in the cylindrical portion 86 instead of or together with the annular gap 106.

  The above-described damper 51 is similar to the damper 1 in that, for example, the container 52 is fixed to the vehicle body side, while the hexagonal column portion 78 of the shaft member 53 is fixed to the side door side of the vehicle. In this case, the damper 51 is attached to the hinge mechanism so that the spherical body 102 is positioned in the small inclined angle guide groove 97 in the closed state of the side door. In this state, when the shaft member 53 is rotated in the A direction by opening the side door, the movable member 81 is relatively moved in the B direction by the sphere 102 guided by the small inclination guide groove 97 having the inclination angle β2. As a result of being moved at high speed and expanding the volume of the chamber 54, the volume of the chamber 55 is reduced. As a result, the fluid 5 in the chamber 55 flows into the chamber 54 via the passage 85, and a relatively large resistance to this flow. Is given to the shaft member 53 at the initial opening of the side door.

  When the side door is further rotated to open against this relatively large resistance after the initial opening of the side door and the sphere 102 is positioned in the large inclination angle guide groove 95 having the inclination angle β1, the movable member 81 Is moved at a relatively low speed in the B direction to expand the volume of the chamber 54, while the volume of the chamber 55 is reduced. As a result, the fluid 5 of the chamber 55 whose volume is reduced is passed through the passage 85. The reduced resistance in this flow is imparted to the shaft member 53 in the opening following the initial opening of the side door.

  When the side door is further rotated to open against the reduced low resistance and the sphere 102 is positioned in the small inclination angle guide groove 98 having the inclination angle β2, the movable member 81 is again moved in the B direction. While the volume of the chamber 54 is increased by being moved at a relatively high speed, the volume of the chamber 55 is reduced. As a result, the fluid 5 in the chamber 55 flows into the chamber 54 through the passage 85, Great resistance is imparted to the shaft member 53 with further opening of the side door. Thus, the resistance increasing means 56 increases the movement amount of the movable member 81 in the B direction per unit rotation of the shaft member 53 in the rotation of the shaft member 53 relative to the container 52 in the A direction, in other words. In the rotation of the shaft member 53 relative to the container 52 in the A direction, the rate of increase / decrease of the fluid volume of the two chambers 54 and 55 is increased to increase the resistance force.

  When the side door is further rotated to open against the increased resistance and the sphere 102 is positioned in the large inclination angle guide groove 96 having the inclination angle β1, the movable member 81 is relatively slow in the B direction. As a result of the movement, the volume of the chamber 54 is enlarged, while the volume of the chamber 55 is reduced. As a result, the fluid 5 of the chamber 55 whose volume is reduced flows to the chamber 54 via the passage 85 and decreases in this flow. The applied resistance is applied to the shaft member 53 by further opening the side door.

  Finally, as shown in FIG. 9, when the sphere 102 is positioned in the small inclination angle guide groove 99 having the inclination angle β2, the movable member 81 is moved again in the B direction at a relatively high speed, and the volume of the chamber 54 is expanded. On the other hand, as a result of the volume of the chamber 55 being reduced, the fluid 5 in the chamber 55 flows to the chamber 54 via the passage 85, and a relatively large resistance in this flow is given to the shaft member 53 by further opening of the side door. It is done. In this state, the stopper works against the opening of the side door to prevent further rotation of the side door in the opening direction.

  When the side door is closed, the damper 51 performs the reverse operation. When the sphere 102 is positioned in the small inclination angle guide groove 99 with respect to the side door, a relatively large resistance and the sphere 102 are large. Reduced resistance when positioned in the tilt angle guide groove 96, relatively increased resistance when the sphere 102 is positioned in the small tilt guide groove 98, position of the sphere 102 in the large tilt guide groove 95 Reduced resistance and a relatively large increased resistance when the sphere 102 is positioned in the small inclination guide groove 97, respectively. In closing the side door, when the sphere 102 is positioned in the small inclination guide groove 97, the stopper acts against the closing of the side door to prevent further rotation in the closing direction of the side door.

  Even in such a damper 51, the resistance force temporarily increases when the sphere 102, which is in the middle of the relative rotation in the A direction of the shaft member 4, is positioned in the small inclination angle guide groove portion 98. The sphere 102, which can prevent the side door from being rotated due to strong winds and unintentionally large human power, is temporarily increased, and the increase in resistance is temporary. When positioned in the corner guide grooves 95 and 96, the side door can be rotated with a small rotational force, and a warning can be given to the unintentional application of a large rotational force to the side door. In addition, the operability can be improved, and in addition, since the resistance increasing means 56 is arranged in the container 2, the size of the hinge can be reduced and the hinge of the side door can be rotated. Also question the narrow space around the mechanism It can be applied without.

  By the way, when the concrete application of the dampers 1 and 51 to the hinge mechanism that rotatably supports the rotary door of the automobile is illustrated, FIGS. 11 to 13 show an example in which the damper 1 is applied to the hinge mechanism 110. FIG. The hinge mechanism 110 includes a vehicle body side attachment member 112 attached to the vehicle body 111, a door side attachment member 114 attached to the side door 113, and the damper 1.

  The vehicle body side mounting member 112 has a through hole 115 and is fixed to the vehicle body 111 with a bolt or the like passing through the through hole 115, and is integrally provided on the mounting plate unit 116 and is mutually attached. A pair of support plate portions 117 and 118 facing each other and a bearing member 120 fixed to the support plate portion 118 in a through hole 119 of the support plate portion 118 are provided. The hexagonal column part 33 has a through hole 121 through which the hexagonal column part 33 is movable in the B direction in the through hole 121 and is supported so as not to rotate in the A direction. A cylindrical portion 122 that supports the shaft portion 31 of the member 4 so as to be movable in the B direction is provided. The lid portion 17 is in contact with the support plate portion 117 so as to be rotatable in the A direction. Part 11 The lid portion 20 is also rotatably contacts the A direction.

  The door-side attachment member 114 has a through hole 125 and is attached to the side plate 113 by a bolt or the like passing through the through hole 125, and is provided integrally with the attachment plate 126. The pair of support plate portions 127 and 128 are opposed to each other, and each of the pair of support plate portions 127 and 128 has a substantially hexagonal through hole 129 through which the cylindrical portion 14 between the lid portions 17 and 20 passes. And is fixedly fitted and fixed to the cylindrical portion 14 in the through hole 129 so as not to move in the A direction and the B direction.

  The hinge mechanism 110 provided with the damper 1 is usually provided at least as a pair (see FIG. 14) for the rotatable connection between the vehicle body 111 and the side door 113 (see FIG. 14). When the side door 113 is opened from the closed state (the state shown in FIG. 11 and FIG. 13) and when the side door 113 is closed from the state (the state shown in FIG. 12) that is opened. As a result, the cylinder portion 14 is rotated in the A direction with respect to the shaft member 4 through the door-side attachment member 114 together with the opening and closing of the side door 113, so that the damper 1 gives the side door 113 the above-described action. become. When the side door 113 is opened and closed, the shaft member 4 is moved (vertically moved) in the B direction without being rotated in the A direction.

  The above is one example in which the damper 1 is used for the hinge mechanism 110, but the hinge mechanism 130 as shown in FIG. 14 using the damper 51 may be used, and the hinge mechanism 130 is mounted on the vehicle body 111. An attachment member 132, a door side attachment member 134 attached to the side door 113, and a damper 51 are provided.

  The vehicle body side mounting member 132 has a through hole 135 and is fixed to the vehicle body 111 with a bolt or the like passing through the through hole 135, and the mounting plate portion 136 is integrally provided with the mounting plate portion 136. The pair of opposed support plate portions 137 and 138 and the through holes 139 of the support plate portions 137 and 138 pass through, and the support plate portions 118 and 138 are fixed in the A direction and the B direction by welding or the like in the through holes 139. The shaft connecting member 140 is fixed, and the shaft connecting member 140 is provided integrally with the hook portion 141 for preventing the removal, and passes through the through hole 139. The cylindrical portion 142 and the cylindrical portion 142 are provided integrally with the cylindrical portion 142 and have a hexagonal recess 143 and a shaft member 5 in the hexagonal recess 143. It is provided with a shaft receiving portion 144 hexagonal prism portion 78 is fitted.

  The door-side attachment member 134 has a through-hole 145 and is provided integrally with the attachment plate 146 and the attachment plate 146 fixed to the side door 113 by bolts or the like passing through the through-hole 145. A pair of support plate portions 147 and 148 opposed to each other is provided, and the pair of support plate portions 147 and 148 are fixed to the cylindrical portion 64 by welding or the like so as to be immovable in the A direction and the B direction. .

  As shown in FIG. 14, at least a pair of such hinge mechanisms 130 provided with the dampers 51 are usually provided for the rotatable connection between the vehicle body 111 and the side doors 113. In the hinge mechanism 130, when the side door 113 is opened from the state where the side door 113 is closed, and when the side door 113 is closed from the state where the side door 113 is opened (the state shown in FIG. 14). The cylinder portion 64 is rotated in the A direction with respect to the shaft member 53 through the door-side attachment member 134 together with the opening and closing of the side door 113, so that the action as described above is given to the side door 113 by the damper 51. Become.

  In any of the hinge mechanisms 110 and 130, the dampers 1 and 51 are used as shaft pins that rotatably connect the side door 113 to the vehicle body 111. However, the present invention is not limited to such an example. In addition to the hinge mechanism for rotatably connecting the door 113 to the vehicle body 111, the dampers 1 and 51 may be used to give the above-described action to the opening and closing of the side door 113. The vehicle body 111 and the side door 113 are usually provided with at least one pair for rotatable connection, but each hinge mechanism does not have to be provided with the damper 1 or 51, and only one hinge mechanism is provided. Alternatively, the damper 1 or 51 may be used.

DESCRIPTION OF SYMBOLS 1 Damper 2 Container 3 Shaft center 4 Shaft member 5 Fluid 6 Resistance increase means

Claims (5)

A container, a shaft member rotatable relative to the container, a fluid contained in the container to provide resistance to relative rotation of the shaft member relative to the container, and a fluid. Resistance force increasing means for temporarily increasing the resistance force applied to the relative rotation of the shaft member with respect to the housing body during the relative rotation of the shaft member with respect to the housing body, It has a hollow part that accommodates the body and a cylindrical part that has a recess or a protrusion extending in the axial direction on the inner peripheral surface, and the shaft member passes through the hollow part and is rotatable relative to the container. The resistance increasing means is configured to divide the hollow portion of the cylindrical portion into two chambers and to be movable in the axial direction so as to surround the shaft member, and a movable member mounted on the shaft member . The fluid between the two chambers in the container in the relative rotation of the shaft member. A passage for moving a guide groove provided on the outer peripheral surface of the shaft member, on the one hand is provided with an engaging member on the other hand with being engaged with the movable member are arranged to be movable in the guide groove In addition, in the relative rotation of the shaft member with respect to the containing body, the rate of increase / decrease of the fluid containing volume of the two chambers is increased to increase the resistance force, and the movable member has a cylindrical recess in the outer peripheral surface. Alternatively, the guide groove has at least two large inclination angle guide groove portions having a given large inclination angle with respect to the axial direction. And a small inclination angle guide groove portion having an inclination angle smaller than the inclination angle of the large inclination angle guide groove portion with respect to the axial direction between the two large inclination angle guide groove portions . A container, a shaft member rotatable relative to the container, a fluid contained in the container to provide resistance to relative rotation of the shaft member relative to the container, and a fluid. Resistance force increasing means for temporarily increasing the resistance force applied to the relative rotation of the shaft member with respect to the housing body during the relative rotation of the shaft member with respect to the housing body, It has a hollow part that accommodates the body and a cylindrical part that has a recess or a protrusion extending in the axial direction on the inner peripheral surface, and the shaft member passes through the hollow part and is rotatable relative to the container. The resistance increasing means is configured to divide the hollow portion of the cylindrical portion into two chambers and to be movable in the axial direction so as to surround the shaft member, and a movable member mounted on the shaft member. The fluid between the two chambers in the container in the relative rotation of the shaft member. A passage to be moved, a guide groove provided on the outer peripheral surface of the shaft member, and an engaging member which is locked to the movable member on the one hand and movably disposed on the guide groove on the other hand. In addition, in the relative rotation of the shaft member with respect to the containing body, the rate of increase / decrease of the fluid containing volume of the two chambers is increased to increase the resistance force, and the movable member has a cylindrical recess in the outer peripheral surface. Alternatively, the guide groove has a protrusion or a recess that is fitted to the protrusion so as to be movable in the axial direction, and the guide groove has a small inclination angle guide groove portion having a given small inclination angle with respect to the axial direction. And a damper having at least one large inclination guide groove having an inclination angle larger than the inclination angle of the small inclination guide groove with respect to the axial direction between the small inclination guide grooves. The damper according to claim 1 or 2, wherein the engaging member includes a spherical body that is rotatably locked to the movable member.   The damper according to any one of claims 1 to 3, wherein the fluid includes oil such as silicone oil, a viscous body, or a viscoelastic body.   A hinge mechanism comprising the damper according to any one of claims 1 to 4 and rotatably supporting a rotary door of an automobile, wherein the container is a rotary door and an automobile body. A hinge mechanism with a damper for an automobile door, wherein the shaft member is fixed to the other of the revolving door and the automobile body.

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