JP2007170415A - Vibration damping device, sign pole, and illumination pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damping device for allowing easy work relating to a mechanism and its formation while reducing the need for design corresponding to installation conditions and the shape of a sign pole, and to provide the sign pole and an illumination pole using the same. <P>SOLUTION: The sign poles to be mounted have different frequencies of vibration to be damped depending on installation conditions or their shapes. A space adjusting means is provided on a space holding material 2 for adjusting a space between an oscillator 3 and a mounting fixing part 1. Thus, the oscillator 3 has a way of most effective oscillation for the damping the frequencies to be damped, and so it is adaptable to wide-rage vibration frequencies, reducing the need for designing the device corresponding to installation conditions and the shape of the sign pole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibration damping device that is mainly attached to a sign pillar, an illumination pillar, and the like installed around a road and dampens vibrations derived from wind, traffic vibration, and the like, and a sign pillar and an illumination pillar using the same. is there.

  As a vibration damping device used by being attached to a conventional sign pillar, lighting pillar, etc. around a road, for example, Patent Document 1 discloses that at least a pair of springs facing each other in a compressed state in a container containing a viscous damping liquid. A vibration damping device is disclosed in which a weight is installed between the springs that house and make a pair.

Japanese Patent Laid-Open No. 10-9337

  However, since the vibration damping device described in Patent Document 1 performs vibration damping by a spring and a weight, when the vibration of the frequency to be damped is effectively damped, the elastic modulus or weight of the spring is used. It is necessary to design the weight and the like according to this frequency, and it is necessary to perform each design, so that the work related to the design is complicated. In addition, it is necessary to attach the spring in a compressed state together with the weight, which complicates the mechanism and makes the work involved in forming complicated.

  The present invention has been made in view of the problems as described above, and it is not necessary to design in accordance with the installation situation, the shape of the sign post, and the like, and the vibration control device capable of simplifying the work related to the mechanism and formation. And a sign pillar and an illumination pillar using the same.

  In order to achieve the above object, the present invention is configured as follows. That is, the vibration damping device according to the present invention includes an attachment fixing portion that vibrates with a structure to be subjected to vibration suppression, a spacing member suspended in a swingable manner with respect to the attachment fixing portion, A rocker attached to the spacing member and provided below the fixing portion and a side wall provided to surround the side of the rocker, and the rocker is shaken by external vibration. A vibration damping device for attenuating vibration by a movement and a collision with a side wall portion of a rocker, wherein the gap holding member is provided with a gap adjusting means for adjusting a gap between the rocker and the mounting fixing portion. It is characterized by this.

  According to the vibration damping device according to the present invention, the frequency of the vibration to be damped varies depending on the installation situation and shape of the marker column or the like to be attached, but is oscillated by the interval adjusting means provided on the interval holding member. By adjusting the distance between the element and the mounting fixing part, the oscillator can be adjusted to the most effective way to attenuate the frequency to be attenuated, and it can be installed in a wide range of vibration frequencies. It is possible to reduce the necessity of designing the device according to the situation and the shape of the sign post.

  The distance adjusting means can be provided with a simple structure as long as the distance adjusting means is formed by a screw portion provided in the interval holding member and a positioning nut screwed to the screw portion. It is preferable that the oscillator can be fixed securely.

  Further, the oscillator is composed of a weight and an elastic body, the weight and the elastic body are provided with a through hole, and if the screw portion is inserted into the through hole and attached to the interval holding member, It is preferable that the oscillator can be attached to the spacing member more easily, and the weight and the elastic body can be securely fixed.

  Further, if the spacing member is formed using a chain in which a plurality of chain members are joined together, the spacing member is provided with a large number of bending points, so that the swinging of the rocker becomes smooth. By changing the number of chain members between the mounting fixing part and the oscillator, it is possible to obtain a distance adjusting means, and it is not necessary to provide a separate distance adjusting means, which is preferable because the structure is simple.

  Further, if the mounting fixing part is provided integrally with the canopy body attached to the upper end of the space part surrounded by the side wall part, the mounting provided on the canopy body even if the sign post is already provided. It is possible to form a vibration damping device just by attaching a spacing member and a rocker to the fixed part in advance, and attaching it to a marker pillar or the like having a space surrounded by the side wall part. The vibration damping device can be easily formed, which is preferable.

  In addition, the marker column and the illumination column according to the present invention are provided with the vibration damping device according to any one of claims 1 to 5.

  According to the marker column and the illumination column according to the present invention, vibrations derived from wind, traffic vibrations, and the like are suppressed by the vibration control device, and fatigue failure can be prevented in advance. By using the vibration control device described in the above, it can be applied to a wide range of vibration frequencies, so that it can be applied to any sign column and lighting column, and can be easily applied to existing ones. Can be.

  In addition, the vibration control device can reduce the work and materials related to the formation without the need to form a separate side wall if a part of the marker column or the lighting column also serves as the side wall. preferable.

  According to the vibration damping device according to the present invention, the frequency of the vibration to be damped varies depending on the installation situation and shape of the marker column or the like to be attached, but is oscillated by the interval adjusting means provided on the interval holding member. By adjusting the distance between the element and the mounting fixing part, the oscillator can be adjusted to the most effective way to attenuate the frequency to be attenuated, and it can be installed in a wide range of vibration frequencies. It is possible to reduce the necessity of designing the device according to the situation and the shape of the sign post.

  Further, according to the sign column and the illumination column according to the present invention, vibrations derived from wind, traffic vibrations, and the like are suppressed by the vibration control device, and fatigue failure can be prevented in advance. By using one of the vibration damping devices described above, it can be applied to a wide range of vibration frequencies, so that it can be applied to any sign column and lighting column, and can be easily applied to existing ones. Can be a thing.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment according to the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a partially broken view showing an embodiment of a vibration damping device according to the present invention. The vibration damping device 10 is provided with an attachment fixing portion 1 that is a rod-shaped body provided between upper ends of a cylindrical tubular main body T having an inner wall surface 5 and a space 6 surrounded by the inner wall surface 5. In the center of the cylindrical main body T in plan view, the spacing member 2 is swingably attached to the lower portion of the mounting fixing portion 1. The cylindrical main body T is attached to a structure to be subjected to vibration suppression. Since the mounting fixing portion 1 is fixedly provided on the cylindrical main body T, the mounting fixing portion 1 is attached to the structure. It is designed to vibrate.

  In the spacing member 2, a long bolt having a threaded portion 21 is screwed to the mounting portion 22 that is an eyenut from below, and the inner diameter of the insertion portion 221 of the mounting portion 22 swings from the outer diameter of the mounting fixing portion 1. The gap maintaining member 2 is swingable with respect to the mounting fixing portion 1 by being made large with a margin of minutes. In the middle of the screw portion 21 of the spacing member 2, an oscillator 3 including a disk-shaped metal weight 31 and a disk-shaped rubber elastic body 32 is attached.

  The oscillator 3 is attached with a distance from the attachment fixing portion 1 defined by an interval adjusting means 4 including a positioning nut 41 screwed to the screw portion 21, an inserted spring washer 42 and a washer 43. Although not shown, the interval adjusting means 4 is also provided below the oscillator 3, and the oscillator 3 is sandwiched from above and below by the interval adjusting means 4 and attached to the screw portion 21.

  Since the spacing member 2 is swingable with respect to the mounting and fixing portion 1, when the vibration damping device 10 is vibrated, the rocker 3 is swung in the space 6, and further, is swung. When the child 3 collides with the inner wall surface 5, the vibration energy is attenuated and vibration suppression is performed. Since the effect of attenuating vibration energy increases as the mass of the oscillator 3 increases, a weight 31 is attached from above and below in addition to the elastic body 32 to increase the weight of the entire oscillator 3. Here, since the outer peripheral surface of the elastic body 32 is outside the outer peripheral surface of the weight 31, the collision with the inner wall surface 5 is made only by the elastic body 32, and generation of noise such as metal sound is prevented. It is made like that.

  FIG. 2 is an explanatory view showing attachment of the oscillator 3 to the spacing member 2. The weight 31 and the elastic body 32 forming the oscillator 3 are provided with through holes 311 and 321 in the center of the plane, and the screw portion 21 is loosely fitted into the through holes 311 and 321. The positioning nut 41 forming the interval adjusting means 4 is screwed into the screw portion 21. First, the positioning nut 41 is screwed into an appropriate position, and the spring washer 42 and the washer 43 are inserted into the screw portion 21. The screw portion 21 is inserted through the through holes 311 and 321 and the screw portion 21 is inserted through the weight 31 and the elastic body 32. Further, the same interval adjusting means 4 from the upper side to the lower side is attached to the screw portion 21. Since the weight 31 and the elastic body 32 are gravity below, if the nut 41 or the like is provided only below, the position of the oscillator 3 can be fixed, but the distance adjusting means 4 is also provided above. Thus, the weight 31 and the elastic body 32 can be sandwiched from above and below to stabilize the behavior, and the vibration control effect can be stably exhibited. It is preferable that effects such as the prevention of the generation of abnormal noise can be achieved.

  When the vibration energy is attenuated by the oscillation of the oscillator 3 in the space 6, the highest attenuation effect is obtained by matching the natural frequency of the oscillator 3 with the oscillation frequency to be attenuated. be able to. The natural frequency of the oscillator 3 depends on the distance L between the support point S of the spacing member 2 by the mounting fixing portion 1 and the center of gravity C of the oscillator 3 in FIG. When the support point S and the center of gravity C oscillate while maintaining a constant distance, the natural frequency of the oscillator 3 changes as shown in FIG. The vibration control effect can be maximized by matching the natural vibration frequency of the rocker 3 with the frequency at which the marker column or the like to be subjected to vibration control most vibrates. In other words, when the frequency of vibration of the target pillars and the like that are subject to vibration suppression is 2.0 Hz, depending on the installation situation and shape, the effect of vibration suppression is maximized by setting the distance L to about 60 mm. In the case of most vibration at a frequency of 1.0 Hz, the vibration damping effect is maximized by setting the distance L to about 250 mm.

  FIG. 4 shows another embodiment of the vibration damping device according to the present invention, and is a side view not showing the side wall on the front side. A chain is used for the spacing member 2 between the mounting fixing portion 1 and the oscillator 3, and the spacing member 2 has many bending points because it can be bent between the chain members R forming the chain. It is provided and can swing like a willow leaf, and the swing of the swinger 3 becomes smooth. Further, the interval adjusting means 4 can be provided with a simple structure by changing the number of the chain members R between the attachment fixing portion 1 and the oscillator 3 as the interval adjusting means 4. In order to obtain the distance adjusting means 4, the chain members R may be connected in advance so as to have a desired length, and the attachment fixing portion 1 can be inserted into the chain member R as in this embodiment. If there is, a longer chain may be prepared, and a chain member R having a desired length may be selected as the spacing member 2 and the attachment fixing portion 1 may be inserted.

  FIG. 5 is a side view showing still another embodiment of the vibration damping device according to the present invention. As in FIG. 4, the front side wall is not shown. A space 6 surrounded by the side wall portion 5 is formed by the cylindrical main body T. A metal canopy G that closes the space 6 is attached to the upper end of the cylindrical main body T, and the lower surface of the canopy G The mounting fixing portion 1 which is a metal hole plate is integrally provided by welding. The attachment holding portion 1 is provided with a jackle J and a chain member R to form an interval holding member 2 provided with an interval adjusting means, and an oscillator 3 is attached to the lower end of the interval holding member 2.

  The canopy body G includes a top plate G1 and a metal plate-like fitting insertion portion G2 which is welded to the lower surface of the top plate G1 and protrudes downward, and the fitting insertion portion G2 is the side wall portion 5 of the cylindrical main body T. And is fastened and fixed by a bolt B1 and a nut N1 in the vicinity of the upper end of the tubular body T. Since the fitting part G2 is provided close to the side wall part 5, the strength against the lateral vibration is increased, and the possibility that the canopy body G is shifted to the right and left is reduced even during long-term use. The fitting portion G2 may be provided over the entire circumference of the inner surface of the cylindrical main body T, but two to six bodies are provided close to the inner surface of the cylindrical main body T at equal intervals, and a bolt / nut, If it is fixed to the cylindrical main body T with rivets, screws, etc., sufficient strength can be obtained to vibrate the attachment fixing portion 1 along with the cylindrical main body T.

  6A and 6B show an example of application of the vibration damping device according to the present invention to a sign post. FIG. 6A is a perspective view showing the vibration damping device to be applied, FIG. c) It is explanatory drawing which shows the attachment state to a marker pillar. In (a), the vibration damping device 10 is provided with a mounting and fixing portion 1 which is a long bolt penetrating in the left-right direction, a flange portion 101 is provided at the lower end of the vibration damping device 10, and a saddle below the flange portion 101. A tube 102 is provided integrally. A push bolt B <b> 2 that can be screwed into the Saya tube 102 is attached around the Saya tube 102. Next, in (b), the oscillating element 3 is placed in the cylindrical main body T so as to be freely oscillated by the oscillating means 5 comprising the chain 51 and the bolt 52, and the flange 101 continues to the inside of the main body 1. The bottom surface of the main body 1 is formed. The sheath tube 102 projecting downward from the flange portion 101 is opened at the bottom and is in a state in which the push bolt B3 is screwed from the side.

  Further, in (c), the sign pillar H to which the vibration damping device 10 is attached is attached with the horizontal beam H2 on the vertical pillar H1 erected from the ground surface, and a sign plate (not shown) or the like on the horizontal beam H2. It is attached to form road signs and the like. In such a sign post H, since the horizontal beam H2 is provided, the vertical column H1 easily swings in the left-right direction with respect to vibration due to the weight thereof, and in the vicinity of the base of the vertical column H1 by swinging in the left-right direction. When high stress is continuously generated, metal fatigue occurs and the possibility of breakage is likely to occur.

  In order to prevent the vertical strut H1 from swinging in the left-right direction, it is effective to provide the vibration damping device 10 at the upper end portion of the vertical strut H1 having the largest swing width. In this embodiment, the shear tube 102 is provided. The inner diameter of the vertical strut H1 is made larger than the outer diameter of the upper end H11, and the sheath tube 102 is fitted to the upper end H11. In this state, the push bolt B3 is screwed and the push bolt B3 is pressed against the upper end H11. Thus, the vibration damping device 10 is attached to the upper end of the vertical column H1.

  The vibration damping device 10 is not limited to a method of fitting and attaching to the upper end portion H11 of the vertical column H1 using the sheath tube 102, and the flange portion 101 is provided at the upper end, and the cylindrical main body 1 is attached. The outer diameter of the upper end portion H11 may be smaller than the inner diameter of the upper end portion H11, and the vibration damping device 10 may be fitted into the upper end portion H11 and held by the flange portion 101 at the upper end portion of the vertical column H1. Moreover, you may attach to the upper end vicinity of the vertical direction support | pillar H1 using a U band etc., or an appropriate location. Moreover, it can apply similarly also to an illumination column and can suppress a vibration. Furthermore, it is also installed in tall buildings such as utility poles, steel towers, water tanks, towers, high-rise buildings, conceptual buildings such as condominiums, or single-family houses that are erected from the ground surface and may be adversely affected by lateral vibration. It can also be used as a vibration control device for daily vibration reduction and for earthquakes with high seismic intensity.

  FIG. 7 shows still another embodiment of the vibration damping device according to the present invention, in which (a) to (c) are perspective views showing the formed state, and (d) shows the formed vibration damping device. It is a longitudinal cross-sectional view shown. As in FIG. 6, the vibration damping device is the upper end H11 of the vertical column H1 of the sign post H. In this embodiment, first, as shown in (a), the column cap provided on the upper end H11. Remove P. The upper end H11 is formed using a cylindrical steel pipe, and the internal space 6 is opened upward by removing the cap P. In the upper end portion H11, as shown in (b), the oscillator 3 to which the spacing member 2 as a chain is attached is placed in a space 6 surrounded by the side wall portion 5 from above. Next, as shown in (c), bolt holes H12 are opened on both side surfaces of the upper end H11, and the mounting fixing portion 1 as a bolt is inserted in the diameter direction. Here, the attachment fixing portion 1 is also inserted into the chain member R constituting the interval holding member 2 in the upper end portion H11, so that the oscillator 3 is moved into the upper end portion H11 by the attachment fixing portion 1 and the interval holding member 2. Is provided to be swingable. By adjusting the distance between the mounting and fixing portion 1 and the oscillator 3 according to the position of the chain member R through which the mounting and fixing portion 1 is inserted, the chain member R becomes the interval adjusting means 4 and the vibration suppressing effect is maximized. be able to. A nut is attached after inserting the attachment fixing part 1, and finally the support | pillar cap P is attached to the upper end part of the upper end part H11 as it was.

  By such a method, the vibration damping device 10 is formed as shown in FIG. The vibration control device 10 is configured such that the oscillator 3 can freely swing in the space 6, but the side wall portion 5 also serves as the inner surface of the vertical column H <b> 1 (or the upper end portion H <b> 11). The vibration damping device 10 can be provided simply and quickly with respect to the existing vertical column H1. When the vertical column H1 vibrates, the vibration energy is attenuated by the swing of the oscillator 3 and the collision with the inner surface of the vertical column H1. Since the rocker 3 collides and the bolt hole H12 is provided near the upper end that does not affect the strength of the marker column so much, even if the vibration control device 10 is provided, there is no problem in strength. .

  FIG. 8 shows still another embodiment of the vibration damping device according to the present invention. (A) and (b) are perspective views showing the formed state, and (c) shows the formed vibration damping device. It is a longitudinal cross-sectional view shown. First, in (a), the support cap P is removed, and the space 6 in the upper end H11 of the vertical support H1 is opened upward. Next, in FIG. 5B, the canopy G as shown in FIG. 5 is attached so as to cover the upper end of the upper end H11 with the spacing member 2 and the oscillator 3 attached. By attaching the canopy G, the spacing member 2 and the oscillator 3 are placed in the space 6 inside the upper end H11. In this state, similarly as shown in FIG. 5, the fitting insertion part G2 and the upper end part H11 of the canopy body G are fixed by an appropriate method such as a bolt, nut, screw or rivet.

  In (c), the vibration control device 10 is configured such that the oscillator 3 is freely swingable in the space 6, but the side wall 5 is the vertical column H <b> 1 (or the vibration control device shown in FIG. 7). The inner surface of the upper end portion H11) is also used, and it is not necessary to separately provide the cylindrical main body T provided with the side wall portion 5, and the vibration damping device can be simply and quickly applied to the existing vertical column H1. 10 can be provided. Since the canopy body G is provided with the mounting and fixing portion 1, there is no need to process the marker pillar H, and the vibration damping device 10 can be provided quickly and easily.

It is explanatory drawing which shows one Embodiment of the damping device concerning this invention. It is explanatory drawing which shows an example of attachment to the space | interval holding | maintenance material of a rocker. It is the figure and graph explaining the natural vibration frequency of a rocker of the vibration damping device concerning the present invention. It is explanatory drawing which shows other embodiment of the damping device concerning this invention. It is explanatory drawing which shows other embodiment of the damping device concerning this invention. It is explanatory drawing which shows other embodiment of the damping device concerning this invention. It is explanatory drawing which shows other embodiment of the damping device concerning this invention. It is explanatory drawing which shows other embodiment of the damping device concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting fixing part 2 Space | interval holding | maintenance material 21 Screw part 22 Positioning nut 3 Oscillator 31 Weight 311 Through-hole 32 Elastic body 321 Through-hole 4 Space | interval adjustment means 5 Side wall part 6 Space 10 Damping device R Chain material G Canopy body H Signpost

Claims (7)

A mounting and fixing portion that vibrates with a structure to be subjected to vibration suppression, a spacing member that is swingably suspended from the mounting and fixing portion, and a mounting and fixing portion that is attached to the spacing and holding member. A rocker provided below and a side wall provided so as to surround the side of the rocker. The vibration damping device according to claim 1, wherein the gap holding member is provided with a gap adjusting means for adjusting a gap between the swinging element and the mounting fixing portion. 2. The vibration damping device according to claim 1, wherein the interval adjusting unit is formed by a screw portion provided in the interval holding member and a positioning nut screwed to the screw portion. The oscillator includes a weight and an elastic body. The weight and the elastic body are provided with a through hole, and the screw portion is inserted into the through hole and attached to the interval holding member. The vibration damping device according to claim 2. 2. The vibration damping device according to claim 1, wherein the spacing member is formed using a chain in which a plurality of chain members are connected. 5. The vibration damping device according to claim 1, wherein the attachment fixing portion is provided integrally with a canopy body attached to an upper end of a space portion surrounded by the side wall portion. A sign post and an illumination post provided with the vibration damping device according to claim 1. 7. The sign post and the illumination post according to claim 6, wherein a part of the sign post or the illumination post also serves as a side wall.

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