JP6970620B2 - Vibration control device for suspension equipment - Google Patents

Description

The present invention uses an annular material such as a wire to quickly vibrate the suspension equipment when the suspension equipment supported by the upper frame or suspended from the ceiling vibrates due to seismic motion or the like. It relates to a vibration damping device for suspension equipment that attenuates.

For example, suspension equipment such as pendant type lighting fixtures, which are suspended from the lower surface of the upper (upper floor) skeleton or suspended from the ceiling and supported by the upper skeleton, vibrate in the building during an earthquake, etc. In order to continue, in order to prevent the fall due to repeated vibration, it is necessary to have a function for damping the vibration at the same time as the start of the vibration (see Patent Documents 1 and 2). The skeleton that supports the suspension equipment may be the hull of a ship.

In Patent Document 1, a rolling element that is rotatably stored in a cylindrical case that is curved downward in a hanging tool that is mainly suspended from the skeleton is rolled in the direction opposite to the direction of vibration when the skeleton vibrates. By doing so, it is attempting to suppress the vibration of the hanger (paragraph 0019). By filling the case with a viscous fluid (claim 6), it is also possible to attenuate the vibration of the hanger (paragraph 0009).

In Patent Document 2, a viscoelastic body is suspended from a skeleton, and a plurality of suspension members arranged in two horizontal directions support the suspended body of the suspension equipment body, and the suspension members are translated in two horizontal directions. A damping force is generated in the absorbing member in which the above-mentioned materials are laminated (paragraphs 0014 to 0029, FIGS. 1 to 5). Patent Document 2 also shows an example in which the movement of a stretched wire is used and the frictional force generated between the plate sandwiching the wire and the wire is used as a damping force (paragraphs 0031 to 0045, FIGS. 6 to 6). 15).

Japanese Unexamined Patent Publication No. 11-82613 (paragraphs 0016 to 0032, FIGS. 1 to 16) Japanese Unexamined Patent Publication No. 2013-40494 (paragraphs 0014 to 0029, FIGS. 1 to 15)

However, in Patent Document 2, the wire is stretched (erected) via a plurality of hanging members suspended vertically from the lower surface of the ceiling portion, and both ends of the wire are suspended on both sides of the wire in the stretching direction. The wire is not closed because it is connected to the lower member.

In this relationship, the wire can only move with respect to the suspension member only when the suspension member vibrates in the direction in which the plurality of suspension members are arranged (FIG. 11). Even if the hanging member vibrates in the direction orthogonal to the arrangement direction, the wire cannot move with respect to the hanging member. Therefore, in Cited Document 2, the direction in which the damping force using the frictional force of the wire is generated is limited to one horizontal direction in the tensioning (erection) direction of the wire (paragraph 0034), and only one wire is used in two horizontal directions (paragraph 0034). It is not possible to obtain the damping force due to the vibration of the hanging member in any direction).

From the above background, the present invention can obtain a damping force due to vibration of a suspension material in two horizontal directions (arbitrary direction) in addition to one horizontal direction by utilizing the movement of an annular material such as a stretched wire. It proposes a vibration damping device for suspension equipment.

The vibration damping device for suspension equipment according to claim 1 is suspended from an upper skeleton and is swingably supported around any one of the support points below the lower surface of the upper skeleton around a rotation axis in at least one direction. A suspension member that constitutes a suspension facility supported by the upper skeleton, and at least one that is supported by the upper skeleton or the lower skeleton and is rotatably held around a support axis facing in either direction. It has a pulley, an annular material that is fixed to the suspension member at a position below the support point, and is hung on the pulley and is closed in an annular shape with tension applied, and a pulley portion on which the annular material is hung. A rotary damper that generates a damping force when the pulley portion rotates with the movement of the annular member is provided, and the suspension member can swing in a direction other than the in-plane including the closed annular member, and the said The annular material can be circulated, and a part of the annular material is pressed toward the outer peripheral side via the pulley arranged on the inner peripheral side of the annular material on the inner peripheral side of the annular material to form the annular material. It is a constituent requirement that a tension applying material for applying tension is arranged.

The upper skeleton refers to the skeleton (structure) of the upper floor (upper floor) of the layer where suspension equipment is installed or connected and supported in a structure such as a building, and the form and structure type of the structure do not matter. .. The suspension equipment may be suspended directly from the upper skeleton, or suspended from the ceiling material supported by the upper skeleton and indirectly supported by the upper skeleton. Suspension equipment is mainly lighting equipment, but it may also be air conditioners and other electrical equipment and its accessories.

As shown in FIG. 1, the "support point 20" which is the rotation center of the suspension member 3 is located on the lower surface of the upper skeleton 9 or below it, and is the rotation center when the suspension member 3 swings (vibrates). Refers to the center of the support member 2 having a shape of a rotating body, such as a point or a sphere containing the point of the center of rotation. The support material 2 rotates about the support point 20 while being placed on the upper surface of the receiving material 7 that directly supports (receives) the support material 2. Since the center of rotation of the suspension member 3 is the center of the support member 2, and the support member 2 is also a part of the upper end portion of the suspension member 3, the support member 2 does not necessarily have to be a separate body from the suspension member 3.

In the case of a sphere, the support material 2 rolls while being in direct or indirect contact with the upper surface of a plate-shaped (dish-shaped) receiving material 7 having a curved surface shape such as a spherical surface that is convex downward. It rotates around the support point 20 without. In this case, an opening 7a having an arc shape or the like is formed at the bottom of the receiving member 7 for the suspension member 3 to pass through. When both the lower surface side of the support material 2 and the upper surface of the receiving material 7 are spherical surfaces, the curvatures of both spherical surfaces may be different from the same case. Low friction of bearings, tetrafluoroethylene resin, etc. to allow rotation of the support material 2 or not to hinder the rotation of at least one of the surface of the support material 2 and the upper surface of the receiving material 7 in contact with each other. The material may be intervened.

In claim 1, "swingable around a rotation axis in at least one direction" means "swingable around a rotation axis in at least one direction, mechanically (structurally (morphologically)) or latently. It means that it is possible to swing around the rotation axis in two directions (arbitrary direction). " "Available in two directions" means that the suspension member 3 can swing around an axis of rotation in at least two directions (centered on the axis of rotation) with respect to the upper skeleton 9, and is supported by the above. It means that the material 2 rotates about the support point 20 or about the support point 20 and another fulcrum in at least two directions with respect to the upper skeleton 9.

"At least two directions" means that the direction of rotation when the support member 2 rotates around the support point 20 (the vibration direction of the suspension member 3 (the surface including the vibration direction)) is at least two directions. "Two directions" means that the axial direction of the rotating shaft faces two horizontal directions, and the axial direction of the rotating shaft may be inclined with respect to the horizontal. Including that the suspension member 3 is swingable. When the suspension member 3 itself can swing in only one direction about the support point 20, as shown in FIG. 3, vibration (sway) with respect to the upper skeleton 9 in an intersecting direction such as orthogonal to the swing direction. By interposing the hinge 11 that allows movement) between the hinge 11 and the upper skeleton 9, the result is "a state in which swinging around the rotation axis in two directions is possible", and the suspension member 3 in this case is described above. Corresponds to "a state in which the support point 20 and other fulcrums can be rotated with respect to the upper skeleton 9".

When swinging in two directions is possible (free), for example, when the support member 2 and the suspension member 3 are separate bodies, the upper end portion of the suspension member 3 supports (including) the shape of a rotating body having a support point 20. The support material 2 is supported on the receiving material 7 in a state of being integrally connected (connected) to the lower surface side of the material 2 and protruding vertically downward from, for example, the opening 7a of the receiving material 7. When the structure vibrates due to an earthquake or the like, the support member 2 rotates on the receiving member 7 as described above, so that the suspension member 3 swings around the support point 20 in a pendulum manner.

The upper skeleton 9 or the lower skeleton (not shown) supports at least one pulley 4 that is rotatably held around a fulcrum facing in either direction. As shown in FIG. 3, for example, the pulley 4 is an upper skeleton as a fixed pulley in which the position of the shaft (rotating shaft) 41 is fixed by being pivotally supported by a bracket 10 having a support shaft supported by the upper skeleton 9 or the like. It is installed below 9. As will be described later, the pulley portion 61 of the rotary damper 6 which also serves as the pulley 4 is similarly installed below the upper skeleton 9 as a fixed pulley. The pulley 4 and the rotary damper 6 may be supported by the upper skeleton 9 or the lower skeleton (lower layer side). Since the direction of the shaft 41 of the pulley 4 is irrelevant to the swinging direction of the suspension member 3 (rotational direction of the support member 2), the direction of the shaft 41 of the pulley 4 is toward the center of rotation of the support member 2. There are no restrictions.

The "holding" of "at least one pulley rotatably held around a support shaft" in claim 1 means that the pulley 4 is installed as a fixed pulley. "Any direction" refers to a horizontal direction or an arbitrary direction inclined with respect to the horizontal direction, and "support axis" is synonymous with a rotation axis. An annular member 5 such as a wire is hung on the pulley 4, and the annular member 5 is also hung on the pulley portion 61 of the rotary damper 6. Although the drawing shows an example in which the annular member 5 is hung with one rotary damper 6, the number of the rotary damper 6 is not limited to one. In addition to wires, a belt (V-belt), a chain, or the like is used for the annular material 5.

Since the annular member 5 is also hung on the pulley portion 61 of the rotary damper 6, the pulley portion 61 of the rotary damper 6 also serves as a pulley 4 for tensioning the annular member 5. As a result, the annular member 5 is partially fixed (connected) to the suspension member 3 while being hung on at least two pulleys 4 (including the pulley portion 61), and maintains a tensioned state. Therefore, at least one pulley 4 excluding the rotary damper 6 for constituting the vibration damping device 1 is sufficient (claim 1).

The annular member 5 is hung on a plurality of pulleys 4 including the pulley portion 61 and closed in an annular shape so that a part of the annular member 5 is fixed to the suspension member 3 and the suspension member 3 swings (vibrates). ) At the same time, the annular member 5 can circulate in the tension direction. The circulation of the annular member 5 occurs when the fixing point 30 of the annular member 5 to the suspension member 3 moves, and occurs regardless of the swing direction of the suspension member 3. Therefore, the suspension member 3 includes the annular member 5. Even when swinging in a direction other than within the surface (the surface drawn by the closed annular member 5), the rotary damper 6 which is a part of the pulley 4 can generate a damping force. That is, since the rotary damper 6 can generate a damping force when the suspension member 3 swings in one horizontal direction and when the suspension member 3 swings in an arbitrary direction, the movement of the annular member 5 is used to generate a damping force in two horizontal directions (arbitrary direction). ), It is possible to obtain the damping force due to the vibration of the suspension member 3.

When the suspension member 3 swings around the support point 20, the center of gravity of the suspension member 3 rises from the suspended state at the original position (original position (neutral position)). At this time, the component of the gravity acting on the center of gravity of the suspension member 3 in the direction perpendicular to the axis of the suspension member 3 tries to return the suspension member 3 to the original position before the swing, so that the suspension member 3 swings. Demonstrate restoring force at the same time as movement. When the suspension member 3 swings, the fixing point 30 of the annular member 5 to the suspension member 3 moves around the support point 20, and the annular member 5 remains hung on the pulley 4 in the tensioning direction (circumferential direction). ), But a part of the annular member 5 is connected (fixed) to the suspension member 3, so that the annular member 5 also returns to the original position when the suspension member 3 returns to the original position. do.

If the annular member 5 can maintain a state in which tension is generated even when the suspension member 3 swings, it can circulate around the pulley 4 when the suspension member 3 swings, and the pulley portion 61 of the rotary damper 6 can be rotated. , The pulleys 4 and 4 may be hung on the pulleys 4 in a state where no slack is generated or in a state where no slack is generated. "In the state" means that the arrangement of the pulley 4 and the like is adjusted, and "in the state" means that tension is applied to the annular member 5 in advance, for example. "Pulley 4 etc." is a term including the pulley 4 and the pulley portion 61.

Here, when the pulleys 4 and the like are arranged on both sides of the suspension member 3 as shown in FIG. 1 (FIG. 6), is the annular member 5 loosened due to the swing of the suspension member 3? The verification results are shown in FIGS. 7- (a) and 7- (b). FIG. 7- (a) shows the degree of expansion and contraction (presence or absence of slack) when the horizontal distance X1 between the shaft 41 of the pulley 4 and the support point 20 is changed, and FIG. 7- (b) shows the shaft 41 of the pulley 4 and the support point 20. It shows the degree of expansion and contraction (presence or absence of slack) when the vertical distance Yp between them is changed. From FIG. 7- (a), it can be seen that the smaller the horizontal distance X1 between the shaft 41 of the pulley 4 and the support point 20, the larger the elongation deformation, and the larger the X1, the smaller the elongation deformation and the tendency for shrinkage (slack) to occur. ..

Since the section of the annular member 5 stretched on the upper side of the pulley 4 on the opposite side (θ +) of the side where the suspension member 3 sways (θ−) is the extension side, the suspension member 3 is in the original position (swing angle). Looseness is likely to occur when returning to 0 °). In other words, if the state of the annular member 5 is adjusted so that slack does not occur when the suspension member 3 returns to the original position, the length becomes insufficient when the stretched section of the annular member 5 is stretched, which is substantially the same. Since a tensile force is generated in the extension section, this extension section can act as a stopper.

Further, from FIG. 7- (b), by adjusting the vertical distance Yp between the shaft 41 of the pulley 4 and the support point 20, the annular material 5 (wire) usually within the range of the assumed runout angle (about 30 degrees). It can be seen that the amount of expansion and contraction of the above can be suppressed to within 0.2 mm, which is almost negligible. In this case, when the suspension member 3 sways beyond about 30 degrees, the extension section can act as a stopper as described above, so that the sway can be controlled so as not to exceed a certain degree of deflection angle. It can also be said that.

As described above, the pulley portion 61 of the rotary damper 6 rotates due to the movement (circulation) of the annular member 5 accompanying the swing of the suspension member 3 supported by the upper skeleton 9 so as to swing freely around the rotation axis in at least one direction. Then, the rotary damper 6 generates a damping force. As a result, it becomes possible to obtain a damping force due to the vibration of the suspension member 3 in two horizontal directions (arbitrary direction) in addition to the swing in one horizontal direction while utilizing the movement (circulation) of the annular member 5. When the suspension member 3 swings, braking is applied to the suspension member 3 so that the swing (amplitude) of the suspension member 3 does not increase at the same time as the swing occurs, so that the swing of the suspension member 3 is damped at an early stage.

Specifically, for example, as shown in FIG. 3, the rotary damper 6 is arranged around the rotary shaft 62 fixed to the pulley portion 61 and the surface of the rotary shaft 62 as the rotary shaft 62 rotates. A damping material 63 that generates a damping force between the two is provided (claim 2). Like the suspension member 3, the rotary damper 6 is supported by the upper skeleton 9 in a suspended state from the upper skeleton 9, or is supported by a support column or the like supported by the lower skeleton such as a floor.

The fact that the damping material 63 is arranged around the rotating shaft 62 means that the damping material 63 is in contact with the peripheral surface of the rotating shaft 62, and the rotating shaft 62 fixed to the pulley portion 61 is arranged around the axis. By rotating, a damping force due to frictional resistance, viscous resistance, or the like is generated between the rotating shaft 62 and the damping material 63. The larger the contact area between the rotating shaft 62 and the damping material 63, the larger the damping force. Therefore, for the purpose of expanding the contact area with the damping material 63, a disk or the like is integrated around the rotating shaft 62 to form a disk. In some cases, both sides in the thickness direction such as the above may be brought into contact with the damping material 63. As the damping material 63, an elastic body such as rubber, a viscoelastic body, or a viscous fluid or the like is used. When a viscous fluid is used, watertightness is ensured between the rotating shaft 62 and the damping material 63.

Both ends (tails) of the annular member 5 are fixed to one of the pulleys 4 constituting the vibration damping device 1, but when the annular member 5 is wound around the same pulley 4, it is wound several times. The portions of the annular member 5 interfere with each other, and the annular member 5 is unwound from the pulley 4 when the pulley 4 is rotated, and the annular member 5 does not smoothly wind up, and the annular member 5 hinders the rotation of the pulley 4. is assumed.

Therefore, as shown in FIG. 5, one pulley 4 is composed of two pulley members 42, 42 integrally connected (fixed) in the axial direction, and one end (tail) of the annular member 5 is formed. By fixing to one pulley material 42 and fixing the other end of the annular material 5 to the other pulley material 42 (claim 3), both ends of the annular material 5 are fixed to the same location of the same pulley 4. It is possible to avoid such a situation and prevent the occurrence of a situation in which the annular member 5 hinders the rotation of the pulley 4.

In this case, even though both ends of the annular member 5 are fixed to the same pulley 4, the annular member 5 wound around the pulley 4 does not overlap with each other, and the annular member 5 does not interfere with the same pulley 4. When the annular member 5 is rotated, the annular member 5 is easily unwound from the pulley 4 and easily wound, so that the annular member 5 does not hinder the rotation of the pulley 4.

The suspension material, which is supported by the upper skeleton and is rotatably held around the support shaft, is fixed to the annular member to be hung on the pulley. It is supported freely, and the pulley part of the rotary damper is rotated by the movement (circulation) of the annular material when the suspension material swings, and a damping force is generated in the rotary damper. In addition to the direction, the damping force due to the vibration of the suspension material in two horizontal directions (arbitrary direction) can be obtained.

(A) is an elevation view showing a configuration example of a vibration damping device having two pulleys and one rotary damper, and the rotary damper is arranged on the inner peripheral side of the annular material, and (b) is a rotary damper. It is an elevation view which showed the relationship between the rotary damper and the annular material when is arranged on the outer peripheral side of the annular material. It is a top view which showed the arrangement state of the pulley and the suspension material of the example shown in FIG. It is a vertical sectional view which showed the detailed example of a rotary damper. It is an elevation view which showed the structural example of the vibration damping device which has one pulley and one rotary damper. It is a perspective view showing the relationship between the pulley and the annular material when one pulley is composed of two pulley materials integrally connected in the axial direction and the end of the annular material is fixed to each pulley material. be. It is an elevation view which showed the model for grasping the degree of expansion and contraction of an annular material when the horizontal distance X1 and the vertical distance Yp between the shaft of a pulley and a support point are changed. (A) is a graph showing the degree of expansion and contraction when the horizontal distance X1 between the pulley shaft and the support point is changed, and (b) is the graph when the vertical distance Yp between the pulley shaft and the support point is changed. It is a graph which showed the degree of expansion and contraction (presence or absence of slack). The position and support point of the pulley shaft so that the locus of the ellipse focusing on the axes of the two pulleys is located closer to the support point than the arc drawn by the fixing point of the annular material to the suspension material when the suspension material swings. , And is a schematic diagram showing the relationship between the arc and the ellipse when the positions of the fixed points are adjusted. In (a) and (b), a part of the annular material is pressed from the inner peripheral side or the outer peripheral side of the annularly closed annular material to the outer peripheral side or the inner peripheral side to apply tension to the annular material. It is a schematic diagram which showed the state that the material was brought into contact with each other.

1 (a) and 1 (b) show a suspension member 3 suspended from the upper skeleton 9 and supported by the upper skeleton 9, and at least one pulley supported by the upper skeleton 9 or the lower skeleton 9. 4 has an annular member 5 such as a wire or a belt that is hung on the pulley 4 while being fixed to the suspension member 3 and tension is applied, and a pulley portion 61 on which the annular member 5 is hung. A configuration example of a vibration damping device for suspension equipment (hereinafter referred to as a vibration damping device) 1 including a rotary damper 6 that generates a damping force during rotation due to movement is shown.

The suspension member 3 is a part of suspension equipment such as a lighting fixture supported by the upper skeleton 9, and swings around a rotation axis in at least one direction at any of the support points 20 below the lower surface of the upper skeleton 9. Vibration) Freely supported. In order to prevent the eccentric moment from acting on the support point 20 when swinging around the support point 20 of the suspension material 3, basically, the suspension equipment is provided so that the center of gravity of the suspension equipment is located on the central axis of the suspension material 3. The center of gravity has been adjusted.

The pulley 4 (including the pulley portion 61 of the rotary damper 6) is located below the support point 20 or the support member 2 having the support point 20, and is rotatably above the upper skeleton 9 around a support axis facing either direction. , Or is held in the lower skeleton. "Holding" means that the position of the shaft (rotating shaft) 41 of the pulley 4 is kept in a state of being directly or indirectly fixed to the upper skeleton 9 or the like. The annular member 5 is hung on the pulley portion 61 of the pulley 4 and the rotary damper 6 while being fixed to the suspension member 3 at a position below the support point 20, and is closed in an annular shape with tension applied.

The reason why the pulley 4 is held below the support point 20 is that the tensioned state of the annular member 5 does not hinder the rotation of the support member 2 including the support point 20, and the annular member 5 is the support point. The reason why it is fixed to the suspension member 3 at a position below 20 is to obtain a state in which the annular member 5 itself is closed in an annular shape. Further, in order to secure a large annular area so that the annular member 5 is easily tensioned, the plurality of pulleys 4 including the rotary damper 6 are annular members in the direction of the shaft 41 of the pulley 4 as shown in FIG. When looking at 5, the annular member 5 is dispersedly arranged on both sides of the suspension member 3, and the annular member 5 is closed by drawing a substantially polygonal shape at the contact portion between the fixing point 30 to the suspension member 3 and the pulley 4.

FIG. 1 shows an outline of the vibration damping device 1 when the annular member 5 is hung on the pulley portions 61 of the two pulleys 4, 4 and one rotary damper 6. In this example, the support material 2 having the support point 20 is formed into a three-dimensional (spherical) shape having at least a spherical surface on the lower surface side, while an opening 7a such as a circular shape is formed at the bottom of the receiving material 7 that supports the support material 2. ing. Due to this shape, the receiving material 7 supports the supporting material 2 so that the supporting material 2 can rotate around the rotation axis in any plurality of directions, but the supporting material 2 supports the support material 2 only around the horizontal axis in two directions, for example. It may be rotatably supported by the receiving material 7.

In FIG. 1- (a), the rotary damper 6 is arranged on the inner peripheral side of the annular member 5, but as shown in FIG. 1- (b), the rotary damper 6 may be arranged on the outer peripheral side of the annular member 5. .. In any of the examples, the rotary damper 6 tries to extend the annular member 5 by coming into contact with the annular member 5, so that the rotary damper 6 acts to increase the tension of the annular member 5. FIG. 1 also shows that the axes (rotating shaft 62) of the pulley portions 61 of the two pulleys 4 and 4 and the rotary damper 6 are oriented in the same direction (horizontal direction), but the directions of the respective axes are It may not be the same.

As shown in FIG. 1, when the support member 2 is supported by the receiving member 7 so as to be swingable around a rotation axis in any plurality of directions, the suspension member 3 may swing so as to intersect with the annular member 5. The central axis of the suspension member 3 connects the plurality of pulleys 4 and the pulley portion 51 as shown in FIG. 2 so that the suspension member 3 does not come into contact with the annular member 5 when swinging within the assumed swing angle. It is appropriate that they are arranged so that they are not located on a straight line.

When the suspension member 3 swings around the support point 20 as shown by the two-dot chain line in FIG. 1- (a), the annular member 5 circulates in the circumferential direction while being hung on the pulley 4 and the pulley portion 61. The rotary shaft 62 of the rotary damper 6 is rotated to generate a damping force in the rotary damper 6. After the suspension member 3 swings to the position where it swings completely (maximum amplitude), the suspension member 3 swings with the tangential component of the arc drawn by the center of gravity of the gravity acting on the center of gravity of the suspension member 3. Try to return to the previous position. Even when the suspension member 3 tries to return to its original position after swinging, the rotary damper 6 generates a damping force, so that the suspension member 3 does not repeat the reciprocating motion, and the swing (vibration) is damped.

FIG. 3 shows a specific example of the rotary damper 6. The rotary damper 6 is arranged around the rotary shaft 62 fixed to the pulley portion 61, and is a damping material 63 that generates a damping force between the surface of the rotary shaft 62 as the rotary shaft 62 rotates. For example, as shown in FIG. 3, a frame 64 that rotatably supports the rotary shaft 62 is suspended and supported by the upper skeleton 9 by being connected (connected) to a bracket 10 fixed to the upper skeleton 9. NS. In addition, the frame 64 or the rotating shaft 62 in FIG. 3 may be supported by the lower skeleton by being connected to a support or a beam supported by the lower skeleton such as a floor or a wall.

Since the frame 64 itself may sway when the pulley portion 61 of the rotary damper 6 is rotated due to the circulation of the annular member 5 due to the swing of the suspension member 3, the frame 64 is, for example, in the direction of the rotation shaft 62 (the pulley portion 61). It is connected to the bracket 10 via a hinge 11 that allows swinging in the out-of-plane direction. In order to allow the pulley portion 61 to swing in the in-plane direction, the frame 64 may be connected to the bracket 10 via a pin or the like in the direction of the rotating shaft 62.

FIG. 4 shows a configuration example of a vibration damping device 1 having one pulley 4 and one rotary damper 6. This example corresponds to the shape in which one pulley 4 near the rotary damper 6 is absent in the example shown in FIG. Also in this example, it is the same as the example of FIG. 1 that the rotary damper 6 generates a damping force when the suspension member 3 swings and returns to the original position.

FIG. 5 shows two pulley members 42, in which one pulley 4 to which both ends of the annular member 5 are fixed is integrally connected (joined) in order to prevent the annular member 5 from being entangled with the pulley 4. An example is shown in the case where both ends of the annular member 5 are fixed to each pulley member 42, which is composed of 42 members. The two pulley materials 42, 42 share a shaft 41. In this example, the annular member 5 does not strictly form a continuous line in an annular shape, and the parts of the pulley 4 composed of the two pulley members 42, 42, or the portions of the annular member 5 do not overlap each other in the vicinity. There is an advantage that the rotation of the pulley 4 is not hindered by the overlapping of the annular members 5. In FIG. 5, reference numeral 43 indicates a frame that directly supports (shafts) the pulley 4.

FIG. 8 focuses on the axes 41 and 41 of the two pulleys 4 and 4 (including the pulley portion 61) from the arc drawn by the fixing point 30 of the annular member 5 to the suspension member 3 when the suspension member 3 swings. The relationship between the arc and the ellipse when the positions of the axes 41 and 41 of the pulleys 4 and 4 and the positions of the support point 20 and the fixed point 30 are adjusted so that the locus of the ellipse is located closer to the support point 20 is shown. The arc drawn by the fixed point 30 when the suspension member 3 swings is shown by a solid line, and the locus of an ellipse is shown by a broken line.

When there are two pulleys 4 and 4, the axes 41 and 41 of the pulleys 4 and 4 become fixed points (focal points of an ellipse), so that the fixed point 30 of the annular member 5 hung on the pulleys 4 and 4 to the suspension member 3 is 30. Trajectories try to draw an ellipse. On the other hand, since the fixed point 30 to the suspension member 3 draws an arc centered on the support point 20, when the arc passes through the support point 20 side from the ellipse, the support point 20 is set when the suspension member 3 swings. Since the distance between the fixed points 30 is shorter than when moving on the ellipse, the annular member 5 may be bent (slackened).

On the other hand, if the positions of the support point 20, the shaft 41 of the pulley 4, and the fixed point 30 are adjusted so that the arc passes through the outer peripheral side of the ellipse (opposite the support point 20) as shown in FIG. Since the locus drawn by the actual fixed point 30 can be positioned on the outer peripheral side with respect to the support point 20 from the locus of the fixed point 30 determined by the position of the shaft 41 of the pulley 4, it is possible to avoid bending of the annular member 5. It will be possible to do. In FIG. 8, the axes 41 and 41 of the two pulleys 4 and 4 are located on the same horizon, but it is not always necessary.

9- (a) and 9- (b) show that a part of the annular member 5 is pressed toward the outer peripheral side or the inner peripheral side on the inner peripheral side or the outer peripheral side of the annular member 5 closed in an annular shape, and the annular member 5 is pressed. A state in which the tension applying material 8 for applying tension is arranged and brought into contact with the annular material 5 is shown. (A) shows a reference example when the tension applying material 8 is arranged on the outer peripheral side of the annular material 5. (B) shows a specific example of the present invention arranged on the inner peripheral side. In the example shown in FIG. 1 in which two pulleys 4 and 4 are used, the rotary damper 6 functions as a tension applying material. Therefore, the tension applying material 8 shown in FIG. 9 becomes an annular material 5 when one pulley 4 is used. It will be used when it is necessary to apply tension or for the purpose of supplementing the role of the rotary damper 6.

1 …… Vibration control device for suspension equipment,
2 …… Support material, 20 …… Support point,
3 ... Suspension material, 30 ... Fixed point,
4 ... Pulley, 41 ... Shaft (rotating shaft), 42 ... Pulley material, 43 ... Frame,
5 …… Ring material,
6 ... Rotating damper, 61 ... Pulley part, 62 ... Rotating shaft, 63 ... Damping material, 64 ... Frame,
7 …… Lumber, 7a …… Opening,
8 …… Tensioning material,
9 …… Upper skeleton,
10 ... bracket, 11 ... hinge.

Claims (3)

Suspended from the upper skeleton, supported swingably around a rotation axis in at least one direction at any of the support points below the lower surface of the upper skeleton, and constitutes a suspension facility supported by the upper skeleton. While being fixed to the suspension material at a position below the support point, the material, at least one pulley supported by the upper skeleton and rotatably held around a support axis facing in either direction. It has an annular member that is hung on the pulley and closes in an annular shape with tension applied, and a pulley portion on which the annular member is hung, and generates a damping force when the pulley portion rotates with the movement of the annular member. Equipped with a rotating damper,
The suspension member can swing in a direction other than the in-plane including the closed annular member, and the annular member can circulate.
On the inner peripheral side of the annular material, a tension applying material that presses a part of the annular material toward the outer peripheral side via the pulley arranged on the inner peripheral side of the annular material to apply tension to the annular material. A vibration damping device for suspension equipment, which is characterized by being arranged. The rotary damper includes a rotary shaft fixed to the pulley portion and a damping material arranged around the rotary shaft and generating a damping force between the surface of the rotary shaft as the rotary shaft rotates. The vibration damping device for suspension equipment according to claim 1, wherein the vibration damping device is characterized. The one pulley is composed of two pulley materials integrally connected in the axial direction, one end of the annular material is fixed to one of the pulley materials, and the other end of the annular material is fixed. The vibration damping device for suspension equipment according to claim 1 or 2, wherein is fixed to the other pulley material.

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