JP7050125B2 - Damper - Google Patents

Description

The present invention relates to a damper in which an actuator arranged in combination with a rotating body swings due to the rotation of the rotating body.

Some blinds arranged in a room or the like are of a type in which a plurality of slats extending in the horizontal direction are arranged in the vertical direction and can be moved in the vertical direction. In such a type of blind, multiple slats are connected via an elevating cord that extends vertically, and one end of the elevating cord is attached to a bottom rail that extends horizontally in parallel with the slats, and the other end. Are each connected to the output rotating member of the take-up mechanism in the headbox. An operation code is connected to the input rotating member of the take-up mechanism, and by operating the operation code to rotate the input rotating member in the forward and reverse directions, the bottom rail connected to the output rotating member via the elevating cord is It moves up and down, which allows multiple slats to move up and down. The take-up mechanism is usually provided with a stopper (sometimes called a cord lock) that holds the operation code, and the operation code is forced to one side (usually outside) in the left-right direction. It is held at any position, and the bottom rail can be fixed at any height position (vertical position). The holding is released by forcing the operation code to the other side in the left-right direction while the operation code is held by the stopper.

As described above, the input rotating member and the output rotating member rotate in conjunction with each other. Therefore, for example, when the operation code is pulled and the bottom rail is raised, if the operation code is not held by the stopper, the operation code is manually operated. When released, the bottom rail will fall freely and collide with the floor or the elevating cord will be pulled out to the maximum and an impact will be applied to the take-up mechanism. This is also the case when the holding of the operation code by the stopper is released and the holding is released so that the bottom rail freely falls. In order to prevent such a free fall of the bottom rail, a damper may be provided in the winding mechanism to limit the descent speed of the bottom rail.

As the damper, a rotary damper including a housing in which a relatively highly viscous fluid such as silicone oil is sealed inside and a rotating member rotatably mounted on the housing is put into practical use. In this rotary damper, the rotational speed of the input rotating member or the output rotating member is limited by applying a torque opposite to the rotation of the rotating member to the rotating member due to the viscous resistance of the fluid. The following Patent Document 1 discloses an example of the rotary damper described above.

Japanese Unexamined Patent Publication No. 7-12166

Therefore, in the rotary damper disclosed in Patent Document 1, the fluid enclosed in the housing may leak to the outside. In addition, since the viscous resistance of a fluid generally changes depending on the temperature, the torque applied by the rotary damper in the opposite direction changes between the summer when the temperature is high and the winter when the temperature is low, and the input is limited by this. The rotation speed of the member or the output member is also different.

The present invention has been made in view of the above facts, and its main technical problem is to provide a novel damper capable of mechanically limiting the rotation speed of a rotating body without utilizing the viscous resistance of a fluid. It is to be.

As a result of diligent studies, the present inventor has provided an eccentric body with a circular cross section on the rotating body, and when the eccentric body rotates eccentrically due to the rotation of the rotating body, the actuator that contacts the eccentric body at a pair of contact points is swung. It was found that the above-mentioned main technical problems can be solved by making the above-mentioned main technical problems.

That is, according to the present invention, as a damper capable of solving the above-mentioned main technical problem, a rotating body that can rotate around a rotating shaft and an actuator that is arranged in combination with the rotating body are provided, and the rotating body is provided. Has an eccentric body having a circular cross section eccentric with respect to the axis of rotation, the actuator is in contact with the eccentric body at a pair of contact points, and when the rotating body rotates, the actuator is subjected to the pair of hits. Provided is a damper characterized in that it swings around a support shaft located on a perpendicular bisector of a line connecting contacts.

Preferably, when the center of the eccentric body is on the perpendicular bisector, the amplitude of the actuator becomes zero and the distance between the line segment and the rotation axis is the eccentricity of the eccentric body with respect to the rotation axis. It will be the same as the quantity. The actuator has an arcuate main portion extending over an angle range of 180 degrees, the eccentric body is arranged inside the main portion, and both ends in the circumferential direction of the inner peripheral surface of the main portion. Should come into contact with the outer peripheral surface of the eccentric body. In this case, it is preferable that a pair of projecting portions projecting in directions close to each other are formed at both ends in the circumferential direction of the inner peripheral surface of the main portion. It is preferable that the eccentric body has a cylindrical shape, the actuator is arranged inside the eccentric body, and the outer peripheral surface of the actuator abuts on the inner peripheral surface of the eccentric body. In this case, it is preferable that the outer peripheral surface of the actuator is formed with protrusions protruding in a direction in which they are separated from each other. The actuator is provided with an opening for accommodating the eccentric body, and a pair of flat surfaces facing each other are defined on the inner peripheral surface of the actuator that defines the opening, and the pair of flat surfaces is defined. It is preferable that each of them abuts on the outer peripheral surface of the eccentric body. In this case, it is preferable that a plurality of the eccentric body and the actuator are arranged in the axial direction. Preferably, the rotating body and the actuator are housed in a housing, and the support shaft is fixed to the housing. It is preferable that the actuator is provided with resistance by the resistance applying means. In this case, it is preferable that the resistance applying means includes a pressing plate that abuts on the actuator and a wave spring that presses the pressing plate axially toward the actuator. Further, the frictional force between the pressing plate and the actuator may be adjustable by the adjusting means.

According to the damper of the present invention, when the rotating body rotates, the eccentric body provided in the rotating body rotates eccentrically, and the actuator arranged in combination with the eccentric body swings, so that the kinetic energy of the rotating body can be obtained. Part of it is converted into the vibration energy of the actuator, which limits the rotational speed of the rotating body. Therefore, according to the damper of the present invention, it is possible to mechanically limit the rotation speed of the rotating body without utilizing the viscosity of the fluid, and the fluid does not flow out to the outside or the braking torque does not change due to the temperature difference. ..

The figure which shows the whole structure of the 1st Embodiment of the damper which was configured according to this invention. The figure for demonstrating the operation of the damper shown in FIG. The figure which shows the whole structure of the 2nd Embodiment of the damper configured according to this invention. The figure which shows the receiving member of the damper shown in FIG. 3 alone. The figure which shows the whole structure of the 3rd Embodiment of the damper configured according to this invention. The figure which shows the whole structure of the 4th Embodiment of the damper configured according to this invention. The figure which shows the pressing plate of the damper shown in FIG. 6 alone. The figure for demonstrating the operation of the damper shown in FIG. The figure which shows the whole structure of the 5th Embodiment of the damper configured according to this invention. The figure which shows the whole structure of the 6th Embodiment of the damper configured according to this invention. The figure which shows the pressing plate of the damper shown in FIG. 10 by itself. The figure which shows one side adjustment plate of the damper shown in FIG. 10 by itself. The figure which shows the other side adjustment plate of the damper shown in FIG. 10 by itself. An unfolded perspective view for explaining a state in which one side adjustment plate and the other side adjustment plate are combined. The figure for demonstrating the operation of the adjustment means. The figure which shows the whole structure of 7th Embodiment of the damper which was configured according to this invention.

Hereinafter, description will be made in more detail with reference to the accompanying drawings illustrating preferred embodiments of dampers configured in accordance with the present invention.

First, a first embodiment of a damper configured according to the present invention will be described with reference to FIG.
The damper represented by the number 2 includes a rotating body 4 that can rotate around the rotation axis o1 and an actuator 6 that is arranged in combination with the rotating body 4. The cross section of the rotating body 4 is shown with light ink instead of hatching so that it can be easily understood. The rotating body 4 includes an eccentric body 8 having a circular cross section that is eccentric with respect to the rotation axis o1. In the illustrated embodiment, the eccentric body 8 has a disk shape. The center of the eccentric body 8 is indicated by the eccentric axis o2, and the eccentric amount of the eccentric body 8, that is, the distance between the eccentric axis o2 and the rotation axis o1 is e. Therefore, when the rotating body 4 rotates around the rotation axis o1, the eccentric body 8 rotates eccentrically around the rotation axis o1 with an eccentricity amount e, that is, the central eccentric axis o2 rotates around the rotation axis o1 as a whole. Rotates. Cylindrical supported portions 10 whose central axis is coaxial with the rotation axis o1 are provided on both side surfaces of the eccentric body 8 in the axial direction. One of the supported portions 10 is provided with a solid shaft portion 12 extending in the axial direction. The cross section of the shaft portion 12 has a shape in which a part of a circle is cut out, and a pair of flat surfaces 14 facing each other in the radial direction are provided. The shaft portion 12 is connected to, for example, an input rotating member or an output rotating member of a blind winding mechanism via a flat surface 14.

In the illustrated embodiment, the actuator 6 comprises an arc-shaped main portion 16 extending over an angle range of 180 degrees, and an eccentric body 8 is arranged inside the main portion 16. A pair of protruding portions 18 projecting in a direction approaching each other (that is, inward in the radial direction of the main portion 16) are provided at both ends of the inner peripheral surface of the main portion 16 in the circumferential direction, and a pair of protruding portions are provided. Each of the 18 is in contact with the outer peripheral surface of the eccentric body 8. That is, the actuator 6 abuts on the eccentric body 8 at a pair of contact points P. The line segment L1 connecting the pair of contact points P does not pass through the rotation axis o1, but passes through the eccentric axis o2 in the state shown in FIG. That is, in the state shown in FIG. 1 (as described later, in this state, the amplitude of the actuator 6 is zero), the line segment L1 connecting the pair of contact points P is equal to the diameter of the eccentric body 8. The actuator 6 can swing with the support shaft 40 located on the perpendicular bisector L2 perpendicular to the line segment L1 connecting the pair of contact points P as a fulcrum (center). In the illustrated embodiment, the support shaft 40 is provided in a housing described later, and a shaft hole 22 through which the support shaft 40 is inserted is formed in the main portion 16 of the actuator 6. The shaft hole 22 is located at the center of the main portion 16 in the circumferential direction. An extension portion 24 extending in the normal direction is provided at the center of the outer peripheral surface of the main portion 16 in the circumferential direction.

In the illustrated embodiment, the rotating body 4 and the actuator 6 are housed in the housing 26. The cross section of the housing 26 is not hatched so that the overall configuration can be easily understood. The housing 26 is composed of a housing body 28 and a shield plate 30. The housing body 28 has a cup shape having a substantially square end plate 32 and a square cylindrical outer peripheral wall 34 extending in the axial direction from the outer peripheral edge of the end plate 32, and the outer peripheral wall 34 has a circular cross section inside. The space portion 36 is defined. A circular support hole 38 for bearing one of the supported portions 10 formed in the eccentric body 8 is formed in the center of the end plate 32. A support shaft 40 that swingably supports the actuator 6 is formed at an intermediate position in the radial direction of the end plate 32. The support shaft 40 extends linearly in the axial direction and has a circular cross section. A pair of guide shafts 42 are also formed on the outer side of the support shaft 40 when viewed in the radial direction. Each of the pair of guide shafts 42 also extends linearly in the axial direction and has a circular cross section, and these are arranged line-symmetrically with respect to the straight line passing through the rotation axis o1 and the support shaft 40. The pair of guide shafts 42 are used when the actuator 6 and the rotating body 4 are combined as required. That is, when the rotating body 4 and the actuator 6 are combined in the housing main body 28, if the actuator 6 is installed in the housing main body 28 prior to the rotating body 4, the actuator 6 is provided by the pair of guide shafts 42. Since the rotation around the support shaft 40 is restricted to some extent, the rotating body 4 can be relatively easily installed in the housing main body 28. The outer peripheral wall 34 is also formed with a fixing hole 43 into which a fixture (not shown) for fixing the shield plate 30 is inserted.

The shield plate 30 has a shape corresponding to the end plate 32 of the housing main body 28, and is arranged at the open end of the housing main body 28. Then, the shield plate 30 is fixed to the housing main body 28 with an appropriate fixing tool (not shown) such as a bolt to close the accommodation space 36. A circular support hole 44 for bearing the other supported portion 10 formed in the eccentric body 8 is formed in the center of the shield plate 30. A shaft hole 46 for bearing the support shaft 40 and the pair of guide shafts 42 is also formed at the required position of the shield plate 30.

Subsequently, the operation of the damper 2 shown in FIG. 1 will be described with reference to FIG. 2 together with FIG. FIG. 2 shows the eccentric body 8 when the rotating body 4 rotates counterclockwise around the axis of rotation o1 from the state shown in FIG. 1 (as viewed from the right side of the left vertical cross section of FIG. 1; the same applies hereinafter). The relationship with the actuator 6 is shown. FIG. 2A shows the rotating body 4 rotated 90 degrees from the state shown in FIG. 1, FIG. 2B rotates 180 degrees, and FIG. 2C rotates 270 degrees. Each shows the state. As shown in FIGS. 2A to 2C, when the rotating body 4 rotates around the rotation axis o1, the eccentric body 8 rotates eccentrically around the rotation axis o1, that is, the central eccentric axis o2 is the rotation axis o1. The whole rotates while rotating around. Due to the eccentric rotation of the eccentric body 8, the actuator 6 that comes into contact with the eccentric body 8 at the pair of contact points P swings with the support shaft 40 as a fulcrum. When the eccentric axis o2, which is the center of the eccentric body 8, is on the perpendicular bisector L2, that is, in the state shown in FIGS. 1 and 2B, the amplitude of the actuator 6 becomes zero and the line is lined. The distance between the minute L1 and the rotation axis o1 is the same as the eccentric amount e of the eccentric body 8 with respect to the rotation axis o1. As a matter of course, the frequency of the actuator 6 depends on the rotation speed of the rotating body 6, and if the rotation speed of the rotating body 6 is high, the frequency of the actuator 6 increases, and if the rotation speed of the rotating body 6 is low, the actuator 6 is used. The frequency of 6 is also reduced. The same applies when the rotating body 4 rotates clockwise around the axis of rotation o1.

From this, according to the damper of the present invention, when the rotating body 4 rotates, the eccentric body 8 provided on the rotating body 4 rotates eccentrically, and the actuator 6 arranged in combination with the eccentric body 8 swings. , A part of the kinetic energy of the rotating body 4 is converted into the vibration energy of the actuator 6, thereby limiting the rotational speed of the rotating body 4. Therefore, according to the damper of the present invention, it is possible to mechanically limit the rotation speed of the rotating body 4 without utilizing the viscosity of the fluid, and the outflow of the fluid to the outside and the change of the braking torque due to the temperature difference occur. not.

Next, a second embodiment of the damper configured according to the present invention will be described with reference to FIG. The damper of this embodiment has the same basic configuration and operation as the damper 2 shown in FIG. Therefore, in the following description, only the part different from the damper 2 described above will be described, and for the same configuration, a is added to the same number and the detailed description thereof will be omitted.

At the extending end of the extending portion 24a of the actuator 6a, an engaging recess 50a recessed inward in the radial direction is formed. The vertical cross-sectional shape of the engaging recess 50a is rectangular, and the shaft portion 54a of the receiving member 52a that is rotatable with respect to the actuator 6a is fitted to the engaging recess 50a. The cross section of the receiving member 52a is not hatched so that the overall configuration can be easily understood. Explaining with reference to FIG. 4, the cross section of the shaft portion 54a is circular, and the receiver portion 56a is provided at the tip thereof. A groove 58a extending in the circumferential direction is formed on the outer surface of the receiving portion 56a, and a vertical hole 60a is formed in the center of the groove 58a in the circumferential direction. Further, the end plate 32a of the housing body 28a is formed with a support shaft 40a and a base shaft 62a extending in the axial direction in parallel with the guide shaft 42a. The base shaft 62a is arranged on a straight line passing through the support shaft 40a and the rotation shaft o1 on the opposite side of the rotation shaft o1 from the support shaft 40a. An engaging hole 64a is formed at the base end portion of the base shaft 62a.

In the damper 2a of the present embodiment, resistance is applied to the actuator 6a by the resistance applying means 48a. In the illustrated embodiment, the resistance applying means 48a is a spring obtained by bending a metal wire rod into a semi-arc shape as a whole, and hook portions 66a formed by bending the wire rod are provided at both ends in the circumferential direction. It is provided. One of the hook portions 66a is inserted into the engaging hole 64a formed in the base shaft 62a, and the other is inserted into the vertical hole 60a of the receiving member 52a fitted in the engaging recess 50a of the actuator 6a to engage with the hook portion 66a. As a result, when the actuator 6a swings, resistance is applied to the actuator 6a by the resistance applying means 48a, and the actuator 6a is less likely to swing. That is, since more energy is required for the actuator 6a to swing, the kinetic energy of the rotating body 4a is relatively small, and the rotation speed of the rotating body 4a is further limited.

FIG. 5 shows a third embodiment of a damper configured according to the present invention. The damper 2b of the present embodiment is different from the damper 2 shown in FIG. 1 in that the eccentric body 8b of the rotating body 4b has a cylindrical shape and the actuator 6b and the support shaft 40b are arranged inside the eccentric body 8b. However, since other configurations and operations are the same as those of the damper 2, detailed description thereof will be omitted.

Next, a fourth embodiment of the damper configured according to the present invention will be described with reference to FIG. Also in this embodiment, only the part different from the damper 2 described above will be described, and the same number will be c. For the same configuration, the detailed description thereof will be omitted.

In the damper of the present embodiment represented by the number 2c, the actuator 6c has a substantially oval shape, and an opening 68c for accommodating the eccentric body 8c is provided in the central portion. A pair of flat surfaces 70c facing each other are defined on the inner peripheral surface of the actuator 6c defining the opening 68c, and each of the pair of flat surfaces 70c is in contact with the outer peripheral surface of the eccentric body 8c. Also in the illustrated embodiment, resistance is applied to the actuator 6c by the resistance applying means 48c. The resistance applying means 48c of the present embodiment is arranged between the shield plate 30c and the actuator 6c, and presses the pressing plate 72c in contact with the actuator 6c and the pressing plate 72c in the axial direction toward the actuator 6c. It is equipped with a wave spring 74c. Therefore, resistance is applied to the actuator 6c by friction with the pressing plate 72c pressed axially by the wave spring 74c. As shown in FIG. 7, the pressing plate 72c is circular, and a central through hole 76c through which the shaft portion 12c of the rotating body 4c is inserted is inserted in the center, and a support shaft 40c of the housing body 28c is inserted in the outer peripheral edge portion. The outer through holes 77c are formed respectively. Therefore, the pressing plate 72c cannot rotate with respect to the housing 28c.

Subsequently, the operation of the damper 2c shown in FIG. 6 will be described with reference to FIG. 8 together with FIG. FIG. 8 shows operation with the eccentric body 8c when the rotating body 4c rotates counterclockwise around the axis of rotation o1 from the state shown in FIG. 6 (same below as viewed from the right side of the vertical cross section of FIG. 6). The relationship with the child 6c is shown. FIG. 8A shows a state in which the rotating body 4c is rotated 90 degrees from the state shown in FIG. 1, FIG. 8B is a state in which it is rotated 180 degrees, and FIG. 2C is a state in which it is rotated 270 degrees. Are shown respectively. As shown in FIGS. 8A to 8C, when the rotating body 4c rotates around the rotation axis o1, the eccentric body 8c rotates eccentrically around the rotation axis o1, that is, the central eccentric axis o2 is the rotation axis o1. The whole rotates while rotating around. Due to the eccentric rotation of the eccentric body 8c, the actuator 6c that comes into contact with the eccentric body 8c at the pair of contact points P swings around the support shaft 40c as a fulcrum. In the present embodiment, the line segment L1 connecting each of the pair of contact points P always passes through the eccentric axis o2 which is the center of the eccentric body 8, and the distance between the line segment L1 and the rotation axis o1 is always the rotation axis. It is the same as the eccentric amount e of the eccentric body 8c with respect to o1.

Next, a fifth embodiment of the damper configured according to the present invention will be described with reference to FIG. The damper of the present embodiment has the same basic configuration as the damper 2c of the fourth embodiment shown in FIG. Therefore, in the following description, only the portion different from the damper 2c described above will be described, and for the same configuration as the damper 2c, d is added to the same number and the detailed description thereof will be omitted.

In the damper of the present embodiment represented by the number 2d, a plurality of eccentric bodies 8d and actuators 6d are arranged in the axial direction, respectively. Each of the plurality of eccentric bodies 8d (six in the illustrated embodiment) is combined with the rotating spindle 78d to form the rotating body 4d. Circumferential locking portions 80d are formed in the axial intermediate portion of the outer peripheral surface of the rotating spindle 78d, and a plurality of circumferential locking portions 80d are formed at equal angular intervals in the circumferential direction (implementation shown in the figure). In morphology, it is formed from 6) teeth. Each of the plurality of eccentric bodies 8d has the same shape, and a circular hole eccentric with respect to the eccentric axis o2 (that is, concentric with the rotation axis o1) is formed. A peripherally locked portion 84d is formed on the inner peripheral surface of the hole, and a plurality of peripherally locked portions 84d are also formed at equal angular intervals in the circumferential direction (in the illustrated embodiment). It is formed from 6) teeth. Each of the plurality of eccentric bodies 8d is arranged in series in the axial direction, the rotating spindle 78d is inserted into each hole, and the rotating spindle is rotated by locking the circumferential locking portion 80d and the circumferential locked portion 84d. It can rotate integrally with the spindle 78d. Here, the plurality of eccentric bodies 8d and the rotation spindle 78d have different positions of the eccentric axis o2 with respect to the rotation axis o1, in other words, the centers of the plurality of eccentric bodies 8d with respect to the rotation axis o1 (eccentricity). The circumferential locking portions 84d of each of the plurality of eccentric bodies 8d and the circumferential locking portions 80d of the rotating spindle 78d are locked so that the phases of the shafts o2) are different from each other. In the illustrated embodiment, the plurality of teeth constituting the circumferential locking portion 80d and the circumferential locked portion 84d are 6 respectively, and the number of the eccentric bodies 8d is also 6, so 6 Each of the eccentric bodies 8d can rotate integrally with the rotating spindle 78d in a state where the phases are shifted by 60 degrees. The number of actuators 6d is the same as that of the eccentric bodies 8d (hence, six in the illustrated embodiment), and the plurality of actuators 6d each accommodate the eccentric bodies 8d. Further, also in this embodiment, the resistance applying means 48d is arranged between the shield plate 30d and the actuator 6d.

In the present embodiment, since a plurality of eccentric bodies 8d and actuators 6d are arranged in the axial direction, more kinetic energy when the rotating body 4d rotates is converted into vibration energy of the eccentric body 8d. In addition, since the phases of the plurality of eccentric bodies 8d with respect to the rotating body 4d are different from each other, the rotation of the rotating body 4d can be smoothly restricted. Since a plurality of actuators 6d are arranged in the axial direction, the kinetic energy of the rotating body 4d can be absorbed even by friction between the plurality of actuators 6d. Further, as in the present embodiment, when a plurality of eccentric bodies 8d and activators 6d are arranged in the axial direction, the actuators when the center o2 of the eccentric bodies 8d is on the vertical bisection line L2. By making the amplitude of 6d zero and the distance between the line segment L1 and the rotation axis o1 the same as the eccentricity e of the eccentric body 8d with respect to the rotation axis o1, each of the plurality of actuators 6d swings. It is prevented that an eccentric load is applied to the rotation shaft o1 due to the motion. When an eccentric load is applied to the rotating shaft o1, the rotation of the rotating body 4d becomes unstable, the efficiency is lowered, and the life of the entire device is shortened.

Next, a sixth embodiment of the damper configured according to the present invention will be described with reference to FIG. The damper of the present embodiment has the same basic configuration as the damper 2d of the fifth embodiment shown in FIG. Therefore, in the following description, only the portion different from the damper 2d described above will be described, and for the same configuration as the damper 2d, e is added to the same number and the detailed description thereof will be omitted.

Even in the damper of the present embodiment represented by the number 2e, a plurality (two in the present embodiment) of the eccentric body 8e and the actuator 6e are arranged in the axial direction, respectively. In the rotating body 4e of the present embodiment, the two eccentric bodies 8e are integrally molded with the rotating spindle 78e.

Also in this embodiment, the resistance applying means 48e is arranged between the shield plate 30e and the actuator 6e. As shown in FIG. 11, four locking protrusions 82e protruding outward in the radial direction are formed on the outer peripheral surface of the pressing plate 72e, which is a part of the resistance applying means 48e, at equal angular intervals in the circumferential direction. Each of the locking protrusions 82e is fitted into each of the four locking grooves 84e formed on the inner peripheral surface of the outer peripheral wall 34e of the housing body 28e. As a result, the rotation of the pressing plate 72e with respect to the housing body 28e is more reliably restricted.

The resistance applying means 48e of the present embodiment includes adjusting means 90e for adjusting the frictional force between the pressing plate 72e and the actuator 6e. The adjusting means 90e is composed of a one-sided adjusting plate 92e and an other-side adjusting plate 94e arranged in series in the axial direction in combination with each other. The one-side adjusting plate 92e is arranged adjacent to the pressing plate 72e in the axial direction via the wave spring 74e. Explaining with reference to FIG. 12, the one-side adjustment plate 92e is circular as a whole, and a circular central through hole 96e through which the rotation spindle 78e is inserted is provided in the center, and a support shaft 40e is provided at the outer peripheral edge portion. Circular outer through holes 98e through which the holes are inserted are formed. Further, four locking protrusions 100e projecting outward in the radial direction are formed on the outer peripheral surface of the one-side adjustment plate 92e at equal angular intervals in the circumferential direction, and the locking protrusions 100e are formed on the housing body 28e. It fits into the locking groove 84e formed on the inner peripheral surface. Therefore, the one-side adjusting plate 92e cannot rotate with respect to the housing 26 like the pressing plate 72e. On the surface of the one-side adjustment plate 92e on the side opposite to the side facing the pressing plate 72e (that is, the surface on the side facing the other-side adjustment plate 94e), an arc-shaped one-sided inclined portion 102e extending in the circumferential direction is provided. It is provided. Two unilateral inclined portions 102e are provided point-symmetrically about the center of the central through hole 96e, and the amount of axial protrusion gradually increases in the counterclockwise direction in the right figure of FIG. The arrows in the figure indicate the direction in which the axial protrusion amount increases. The upper surface (axial end face) 104e of the one-side inclined portion 102e is flat as a whole, but a plurality of (13 in the illustrated embodiment) vertical cross sections are formed in an arc shape at equal intervals in the circumferential direction. The recess 106e is formed. As shown in the right figure of FIG. 12, the recess 106e is circular in a plan view.

The other side adjusting plate 94e is arranged adjacent to the shield plate 30e in the axial direction. Explaining with reference to FIG. 13, the other side adjusting plate 94e is circular as a whole, and a circular central through hole 108e through which the rotation spindle 78e is inserted is provided in the center, and a support shaft is provided at the outer peripheral edge portion. An arc-shaped outer through hole 110e through which the 40e is inserted is formed, respectively. As will be described later, the other side adjusting plate 94e is rotatable about the rotation shaft o1 in the housing body 28e, and when the other side adjusting plate 94e rotates in the housing body 28e, the support shaft 40e is relatively It moves in the circumferential direction in the outer through hole 110e. On the surface of the other side adjusting plate 94e on the side opposite to the side adjacent to the shield plate 30e (that is, the surface on the side facing the one side adjusting plate 92e), the arc-shaped other side inclined portion 112e extending in the circumferential direction Is provided. Two other-side inclined portions 112e are provided point-symmetrically with respect to the center of the central through hole 108e, and the amount of protrusion in the axial direction gradually increases in the counterclockwise direction in the left figure of FIG. The arrows in the figure indicate the direction in which the axial protrusion amount increases. The upper end surface (axial end surface) 114e of the other side inclined portion 112e is flat as a whole, but convex portions 116-1e and 116-2e having an arcuate vertical cross section are formed at both ends in the circumferential direction. .. For easy understanding, in the AA cross section and the BB cross section of FIGS. 10 and 15, the convex portions 116-1e and 116-2e are shown with light ink. The convex portion 116-1e is located on the upper end surface 114e at the counterclockwise downstream end portion in the left figure of FIG. 13, that is, at the circumferential end portion on the side where the axial protrusion amount is large in the other side inclined portion 12e, and the convex portion 116- 2e is located on the upper end surface 114e at the counterclockwise upstream end portion, that is, at the circumferential end portion on the side where the axial protrusion amount is small in the other side inclined portion 12e. An operation groove 118e is provided on the outer peripheral edge of the other side adjusting plate 94e on the side adjacent to the shield plate 30e (that is, the surface on the side not facing the one side adjusting plate 92e). The operation groove 118e is located on the opposite side in the radial direction at the center of the circumferential direction of the outer through hole 110e, extends linearly in the radial direction, and the radial outer end thereof is open. Here, as shown in the upper vertical cross section and the lower AA cross section of FIG. 10, an operation hole 120e communicating with the outside is formed at a required portion of the outer peripheral wall 34e of the housing body 28e, and the other side adjusting plate 94e is formed. When housed in the housing body 28e, the radial outer end of the operating groove 118e is exposed to the outside through the operating hole 120e. Then, by inserting an operation rod (not shown) into the operation groove 118e and operating the operation rod, the other side adjusting plate 94e can rotate around the rotation shaft o1. When the other side adjusting plate 94e rotates around the rotation shaft o1, the support shaft 40e relatively moves in the outer through hole 110e in the circumferential direction. For this reason, the rotation of the other side adjusting plate 94e is limited to the angle range in which the support shaft 40e can move within the outer through hole 110e.

A state in which the one-side adjusting plate 92e and the other-side adjusting plate 94e are combined will be described with reference to FIG. The one-side adjusting plate 92e and the other-side adjusting plate 94e are formed by a surface on the side where one-sided inclined portion 102e is formed in the one-side adjusting plate 92e and a other-side inclined portion 112e in the other-side adjusting plate 94e. It is combined with the surfaces on the side facing each other in the axial direction. Then, when the one-side adjusting plate 92e and the other-side adjusting plate 94e are combined, the convex portions 116-1e and 116-2e formed in the other-side inclined portion 112e are formed in any of the concave portions 106e formed in the one-side inclined portion 102e. By fitting, the angular position of the other side adjusting plate 94e with respect to the one side adjusting plate 92e is held. The force with which the concave portion 106e holds the convex portion 116e is relatively small, and as will be described later, when the other side adjusting plate 94e is rotated with respect to the one side adjusting plate 92e by the operating rod, the holding is released. In the state where the one-side adjustment plate 92e and the other-side adjustment plate 94e are combined, the portion of the upper end surface 114e of the other-side adjustment plate 94e other than the portion where the protrusions 116e-1 and 116e-2 are formed is adjusted on one side. It comes into surface contact with the upper end surface 104e of the plate 92e, and the posture of the other side adjusting plate 94e with respect to the one side adjusting plate 92e is stable.

In the state shown in FIG. 10, as shown in the cross section AA of the same figure, the operation groove 118e of the other side adjusting plate 94e is located at the center of the operation hole 120e in the circumferential direction, and is an outer through hole. The support shaft 40e is located at the center of the circumferential direction of 110e. At this time, as shown in the BB cross section of the figure, the convex portion 116-1e of the other side inclined portion 112e is viewed counterclockwise in the figure among the plurality of concave portions 106e formed in the other side inclined portion 102e. The convex portion 116-2e is located in the fourth concave portion 106e from the upstream end toward the downstream side, and the convex portion 116-2e is located in the fourth concave portion 106e from the downstream end toward the upstream side when viewed counterclockwise.

From the state shown in FIG. 10, an operation rod (not shown) is operated, that is, the operation rod is inserted into the operation groove 118e through the operation hole 120e formed in the housing body 28e, and the other side adjustment plate 94e is inserted into the one side adjustment plate 92e. When rotated counterclockwise, the other side inclined portion 112e also moves counterclockwise with respect to the one side inclined portion 102e. At this time, the support shaft 40e moves relatively clockwise in the outer through hole 110e. FIG. 15A shows a state in which the support shaft 40e has moved to the clockwise end of the outer through hole 110e, and in such a state, the convex portion 116-2e of the other side inclined portion 112e is on one side. Of the plurality of recesses 106e formed in the inclined portion 102e, the recess 106e at the downstream end thereof when viewed counterclockwise in the figure, that is, the recess 106e provided in the portion where the axial protrusion amount is maximum in the one-sided inclined portion 102e. The axial length of the adjusting means 90e, that is, the axial length in the state where the one-side adjusting plate 92e and the other-side adjusting plate 94e are combined is the longest (Xmax). As a result, the force received by the pressing plate 72e from the wave spring 74e increases, the pressing plate 72e is pressed by the actuator 6e with a relatively large pressing force, and a relatively large resistance is applied to the actuator 6e. At this time, the recess 116-1e of the other-side inclined portion 112e fits into the seventh recess 106e from the downstream end thereof when viewed counterclockwise in the figure among the plurality of recesses 106e formed in the one-side inclined portion 102e. I'm out.

On the other hand, when the other side adjusting plate 94e is rotated clockwise with respect to the one side adjusting plate 92e from the state shown in FIG. 10, the other side inclined portion 112e also moves clockwise with respect to the one side inclined portion 102e. At this time, the support shaft 40e moves relatively counterclockwise in the outer through hole 110e. FIG. 15B shows a state in which the support shaft 40e has moved to the counterclockwise end of the outer through hole 110e, and in such a state, the convex portion 116-1e of the other side inclined portion 112e Of the plurality of recesses 106e formed in the one-sided inclined portion 102e, they are fitted into the recesses 106e at the upstream end thereof when viewed counterclockwise in the figure. At this time, the convex portion 116-2e of the other side inclined portion 112e fits into the seventh concave portion 106e from the downstream end in the figure in the counterclockwise direction among the plurality of concave portions 106e formed in the one side inclined portion 102e. It is crowded. Since the amount of axial protrusion of the one-side inclined portion 102e at the portion where the recess 106e is provided is relatively small, the axial length of the adjusting means 90e, that is, the one-side adjusting plate 92e and the other-side adjusting plate 94e are combined. The axial length in the closed state becomes shorter (Xmin). As a result, the force received by the pressing plate 72e from the wave spring 74e is reduced, the pressing plate 72e is pressed by the actuator 6e with a relatively small pressing force, and a relatively small resistance is applied to the actuator 6e.

Therefore, in the damper 2e of the present embodiment, the axial length of the one-side adjustment plate 92e and the other-side adjustment plate 94e combined by rotating the other-side adjustment plate 94e with respect to the one-side adjustment plate 92e. That is, the axial length X of the adjusting means 90e can be adjusted. As a result, the magnitude of the force received by the pressing plate 72e from the wave spring 74e is adjusted, and thus the pressing force received by the actuator 6e from the pressing plate 72e, that is, the magnitude of the frictional force (resistance) applied to the actuator 6e is adjusted. can do.

FIG. 16 shows a seventh embodiment of a damper configured according to the present invention. The damper 2f of the present embodiment has the same basic configuration as the damper 2e of the sixth embodiment shown in FIG. 10, but differs from the damper 2e in that a speed reducer is attached to the rotating body. In the illustrated embodiment, the speed reducer is a planetary gear mechanism 122f, which is a sun gear 124f, three planetary gears 126f that mesh with the sun gear 124f, and a rotatable carrier that rotatably supports these three planetary gears 126f. It includes a 128f and a ring gear 130f that meshes with the planetary gear 126f. The sun gear 124f is fastened to the axial end of the rotating spindle 78f of the rotating body 4f by an appropriate fastening method and rotates integrally therewith. The ring gear 130f is fixed to the housing 26f by an appropriate fixing method. The carrier 128f is provided with an output shaft 132f extending along the rotation shaft o1. From this, the rotation of the rotating body 4f is decelerated by the swing of the actuator 6f, then further decelerated by the planetary gear mechanism 122f, and is taken out from the output shaft 132f.

Although the damper configured according to the present invention has been described in detail with reference to the attached drawings, the present invention is not limited to the above-described embodiment, and appropriate modifications and modifications are made without departing from the present invention. Is possible. For example, in the second embodiment of the damper configured according to the present invention shown in FIG. 3, the resistance applying means 48a is a spring obtained by bending a metal wire rod into a semi-arc shape as a whole. , The pressing plate and the wave spring shown in the third embodiment of the damper configured according to the present invention shown in FIG. 6 may be configured.

2: Damper 4: Rotating body 6: Actuator 8: Eccentric body 40: Support shaft o1: Rotating shaft o2: Center of eccentric body (eccentric shaft)
P: Contact point L1: A line segment connecting a pair of contact points L2: A perpendicular bisector of L1

Claims (12)

It comprises a rotating body that can rotate around a rotating shaft and an actuator that is arranged in combination with the rotating body.
The rotating body includes an eccentric body having a circular cross section eccentric with respect to the rotating axis, and the actuator is in contact with the eccentric body at a pair of contact points.
A damper characterized in that when the rotating body rotates, the actuator swings around a support shaft located on a perpendicular bisector of a line segment connecting the pair of contact points. When the center of the eccentric body is on the vertical bisector, the amplitude of the actuator becomes zero and the distance between the line segment and the rotation axis is the same as the eccentricity of the eccentric body with respect to the rotation axis. The damper according to claim 1. The actuator has an arc-shaped main portion extending over an angle range of 180 degrees, the eccentric body is arranged inside the main portion, and both ends in the circumferential direction of the inner peripheral surface of the main portion. The damper according to claim 1 or 2, wherein the damper abuts on the outer peripheral surface of the eccentric body. The damper according to claim 3, wherein a pair of projecting portions projecting in directions close to each other are formed at both ends in the circumferential direction of the inner peripheral surface of the main portion. The first or second aspect of the present invention, wherein the eccentric body has a cylindrical shape, the actuator is arranged inside the eccentric body, and the outer peripheral surface of the eccentric body abuts on the inner peripheral surface of the eccentric body. Damper. The damper according to claim 5, wherein protrusions are formed on the outer peripheral surface of the actuator so as to project in a direction in which they are separated from each other. The actuator is provided with an opening for accommodating the eccentric body, and a pair of flat surfaces facing each other are defined on the inner peripheral surface of the actuator that defines the opening, and the pair of flat surfaces is defined. The damper according to claim 1 or 2, each of which abuts on the outer peripheral surface of the eccentric body. The damper according to claim 7, wherein a plurality of the eccentric body and the actuator are arranged in the axial direction. The damper according to any one of claims 1 to 8, wherein the rotating body and the actuator are housed in a housing, and the support shaft is fixed to the housing. The damper according to any one of claims 1 to 9, wherein resistance is applied to the actuator by a resistance applying means. The damper according to claim 10, wherein the resistance applying means includes a pressing plate that abuts on the actuator and a wave spring that presses the pressing plate axially toward the actuator. 11. The damper according to claim 11, wherein the frictional force between the pressing plate and the actuator can be adjusted by adjusting means.

Images