JP2006071095A - Vibration control device, sign pole, and illumination pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control device capable of eliminating necessity for designing in accordance with installation situation and a shape of a sign pole and simplifying work related to mechanism and formation. <P>SOLUTION: Since this vibration control device is formed by merely providing a partition plate 3 in a main body 1, the work related to the mechanism and formation of the device becomes simple, and large swing in the vibration control device 10 of viscous liquid 3 is suppressed by subdividing viscous liquid 2 in the main body 1 by the partition plate 3 to hold a vibration control function. By providing a clearance S for letting viscous liquid 2 pass in a part of the partition plate 3, vibration control of wide vibration frequency by use of viscous liquid 2 is not impaired, and necessity for designing the device in accordance with installation situation and the shape of the sign pole is reduced by corresponding to wide vibration frequency and intensity of vibration. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 with a spring and a weight, there is a possibility that a resonance point will occur at the frequency at which these two are tuned. Accordingly, it is necessary to design each so that resonance does not occur. 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. Is intended to provide.

  In order to achieve the above object, the present invention is configured as follows. That is, in the vibration damping device according to the present invention, a partition plate is provided in the main body that contains the fluid liquid, and a gap is formed in a part of the partition plate so that the fluid liquid can pass. It is a feature.

  According to the vibration damping device of the present invention, since it is formed only by providing a partition plate in the main body, the work relating to the mechanism and formation of the device is simplified, and the fluid liquid in the main body is further divided by the partition plate. Therefore, even when high acceleration vibrations such as impact are applied, large vibrations of the fluid liquid in the device can be suppressed and the vibration control function can be maintained. By providing a gap through which fluid liquid can pass, vibration control of a wide range of vibration frequencies by using the fluid liquid is not impaired, and a wide range of vibration frequencies and vibration strengths can be handled. It is possible to reduce the necessity of designing the device according to the installation situation and the shape of the sign post.

  Further, the partition plate is provided so as to be able to swing within the main body, and if the partition plate can collide with the inner wall surface of the main body at the time of swinging, the partition plate can be swung within the main body, so that vibration is generated. The center of gravity of the received device does not become constant, and when vibrations with high acceleration such as impact are applied, the partition plate collides with the inner wall surface of the main body to suppress vibrations, resulting in vibrations with a wide range of frequencies and strengths. Correspondingly, a high vibration damping effect can be exhibited, which is preferable.

  In addition, if the partition plate is provided suspended from above the main body, the partition plate can be swung using gravity by being suspended from above, and not only horizontal vibration but also vertical vibration can be achieved. On the other hand, it is preferable that the partition plate swings to obtain a damping effect.

  A vibration damping device according to the present invention includes a cylindrical main body, a rocker whose cross-sectional shape is substantially the same in the vertical direction, and rocking means for rocking the rocker. A rocker is placed in the main body so as to be rockable by the rocking means, and three or more protrusions are provided on the rocker.

  According to the vibration damping device of the present invention, when the vibration is applied, the oscillator is made to be able to oscillate within the main body, so that the center of gravity of the device does not become constant, and the shock When vibration with high acceleration is applied, the tip of the projecting part collides with the inner wall surface of the main body to suppress vibrations, so that a high damping effect is exhibited corresponding to vibrations of a wide range of frequencies and accelerations. It is possible to reduce the need for designing according to the shape of the sign post or the like. Further, since the rocker can be formed only by providing three or more protruding portions and rocking means, the work related to the mechanism and the formation can be simplified.

  Further, if the projecting portion is formed of an elastic body at least where a collision with the inner wall surface of the main body can be considered, the elastic body can increase the repulsive force at the time of the collision and increase the reaction after the collision of the oscillator. Therefore, the vibration damping effect can be further enhanced, 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. The use of the vibration control device described in (2) makes the work related to the mechanism and formation simple, and it can be applied to a wide range of vibration frequencies and vibration strengths. And can be easily applied to existing ones.

  In addition, it is preferable that the vibration damping device does not need to form a separate main body and part of the material for the formation can be saved if a part of the marker column or the lighting column also serves as the main body.

  According to the vibration damping device of the present invention as set forth in claim 1, since it is formed only by providing a partition plate in the main body, the work relating to the mechanism and formation of the device is simplified, and the partition plate further By subdividing the fluid liquid, it is possible to maintain a damping function by suppressing large fluctuations in the device of the fluid liquid even when high acceleration vibration such as impact is applied, In addition, since a gap through which the fluid liquid can pass is formed in a part of the partition plate, the vibration control of a wide range of vibration frequencies by using the fluid liquid is not impaired, and a wide range of vibration frequencies and vibration strengths are obtained. By being able to cope with this, it is possible to reduce the necessity of designing the device according to the installation situation and the shape of the sign post.

  Further, according to the vibration damping device of the present invention as set forth in claim 4, when the vibration is applied, the center of gravity of the device can be kept constant by making the rocker swing freely in the main body. In addition, when vibration with high acceleration such as impact is applied, the tip of the projecting part collides with the inner wall surface of the main body to suppress vibration, so that a high damping effect corresponding to vibrations of a wide range of frequencies and accelerations. It is possible to reduce the necessity of designing according to the installation situation and the shape of the sign post. Further, since the rocker can be formed only by providing three or more protruding portions and rocking means, the work related to the mechanism and the formation can be simplified.

  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 any of the vibration control devices described above, the work related to the mechanism and formation can be simplified, and it can be applied to a wide range of vibration frequencies and vibration strengths, so that it can be applied to all sign columns and lighting columns. It can be easily applied to existing ones.

  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 shows a first embodiment of a first vibration damping device according to the present invention, in which a) is a partially broken view and b) is a plan view. The vibration damping device 10 includes a body 1 that is a bottomed cylindrical hollow body made of aluminum and contains a fluid liquid 2 that is silicone oil, and the fluid liquid 2 has a cross shape in plan view made of an aluminum plate. The partition plate 3 is provided in the vertical direction, and the partition plate 3 is fixed to the inner wall surface 11 of the main body 1 by welding. In plan view, the partition plate 3 is in contact with the inner wall surface 11 of the main body 1 and no gap is provided. However, in the space occupied by the fluid liquid 2, the gap is respectively above and below the upper and lower ends of the partition plate 3. By making S open, the fluid liquid 2 can pass between the partition plates 3 through the gap S. The upper edge of the main body 1 is preferably not sealed and sealed with a lid or the like to prevent the fluid liquid 2 in the main body 1 from leaking.

  FIG. 2 is a plan view showing an example of modification of the partition plate 3. 1) is a planar cross shape as shown in FIG. 1, but may be divided into three equal parts in plan view as shown in (b), or may be divided into six equal parts in plan view as shown in (c). By subdividing the space occupied by the fluid liquid 2, the amount of oscillation of the fluid liquid 2 is suppressed, and the damping effect against vibration with high acceleration such as impact is enhanced, and the fluid liquid 2 partitioned by the partition plate 3. The higher the amount, the higher the vibration control effect can be achieved at a wide range of vibration frequencies. Therefore, the vibration frequency and acceleration magnitude required according to the installation situation such as signposts are shown in a) to c). By providing an appropriate partition plate 3 as described above, it is possible to obtain an optimum vibration damping effect according to various installation situations.

  FIG. 3 is a partially cutaway view showing an example of a modification of the partition plate 3. The partition plate 3 also divides the space occupied by the fluid liquid 2 at the upper and lower ends. However, as shown in (a), the partition plate 3 is provided with punching holes P so that the fluid liquid 2 can pass through the punching holes P. It is possible to flow by using a gap S or by providing a notch K in the partition plate 3 as shown in b) and using the notch K as a gap S through which the fluid liquid 2 can pass. The ionic liquid 2 passes through and the same effect as that caused by the gap shown in FIG. 1 can be produced.

  The main body 1 and the partition plate 3 are not particularly limited in materials used for formation, but are exposed to vibration over a long period of time. Therefore, metal materials such as steel, aluminum, stainless steel, and zinc having high mechanical strength and toughness. It is preferable to form using.

  The fluid liquid 2 is not particularly limited as long as it can be accommodated in the main body 1 and has fluidity at least at room temperature. Water or the like may be used, but a metal material may be used for the main body 1 and the partition plate 3. In the case of using, there is a risk of corrosion, and if the viscosity is low, the oscillation becomes too large with respect to vibration with high acceleration, so the viscosity is 10 to 1000 cps, preferably 50 to 500 cps. A liquid is preferably used. The fluid liquid 2 is preferably one that is less likely to cause fluid loss due to freezing or adverse effects such as corrosion on the main body 1 and the partition plate 3, such as mineral oil, synthetic oil, ethylene glycol, silicone oil, and silicone gel. It can be used suitably.

  FIG. 4 shows a second embodiment of the first vibration damping device according to the present invention, in which a) is a partially broken view and b) is a plan view. The partition plate 3 accommodated in the main body 1 together with the fluid liquid 2 has a cross shape in plan view, but is not fixed to the inner wall surface 11 or the inner bottom surface 12 of the main body 1 but on the inner bottom surface 12. When the partition plate 3 is placed in the center and the partition plate 3 is placed in the center, the radially leading end portions 31 of the partition plate 3 are provided with the inner wall surface 11 and the gap S, respectively. Further, in the space occupied by the fluid liquid 2, a gap S is also provided above the upper end of the partition plate 3, and the fluid liquid 2 can pass through these gaps. When a vibration in the horizontal direction is applied to the vibration damping device 10 in such a state, the fluid liquid 2 partitioned by the partition plate 3 passes through the gap so that the partition plate 3 is on the inner bottom surface 12 in the fluid liquid 2. Since the center of gravity of the vibration damping device 10 does not become constant, resonance is less likely to occur. Further, when vibration with high acceleration such as impact is applied, the partition plate 3 swings greatly in the fluid liquid 2 and collides with the inner wall surface 11 of the main body 1, and the vibration energy is offset by the collision energy. , Can exert a damping effect against a wide range of vibrations.

  In the second embodiment, the partition plate 3 may be made of a relatively low density such as synthetic resin or aluminum. However, if the density is small, it becomes easy to sway together with the oscillation of the fluid liquid 2. Steel or stainless steel having a relatively large density and high toughness can be suitably used.

  FIG. 5 is an explanatory view showing a third embodiment of the first vibration damping device according to the present invention. A metal suspension bar B is fixed to the upper edge of the main body 1 by welding, a metal chain C is suspended downward from the suspension bar B, and a cross-shaped partition plate in plan view at the lower end of the chain C 3 is attached, and the partition plate 3 is suspended from the main body 1. As in the second embodiment, the partition plate 3 is swingable in the fluid liquid 2, but the lower end of the partition plate 3 and the inner bottom surface 12 of the main body 1 are not in contact with each other. When the plate 3 is swung, the inner bottom surface 12 is slid to prevent generation of scratches and noise. In the space occupied by the fluid liquid 2, a gap is provided between the upper and lower ends of the upper and lower ends of the partition plate 3 and the radial tip 31 of the partition plate 3 and the inner wall surface 11 of the main body 1. The fluid liquid 2 can pass through the gap.

  The partition plate 3 swings left and right in the fluid liquid 2 with respect to the vibration in the horizontal direction and exhibits a damping effect. However, the partition plate 3 swings up and down by being suspended against the vibration in the vertical direction. The vibration control effect can be demonstrated by moving. In addition, since the suspension device is suspended using a flexible material in all directions such as the chain C, the partition plate 3 is swung with respect to vibration applied from all directions, thereby obtaining a vibration damping effect. be able to.

  6A and 6B show an embodiment of a second vibration damping device according to the present invention, in which FIG. 6A is a partially broken surface view with a part of the main body cut away, and FIG. 6B is a longitudinal sectional view. (C) is a plan view. In the vibration damping device 10, a rocker 4 whose cross-sectional shape is a cross and whose cross-sectional shape is substantially the same in the vertical direction is placed in a cylindrical metal body 1. Are provided with four protrusions 41 radially. The oscillator 4 is suspended in the main body 1 by a chain 51, and the chain 52 is suspended in the approximate center of a bolt 52 that is passed and fixed in the diameter direction of the main body 1. In a state where a certain distance is placed from the bottom surface of the main body 1 and no vibration is applied, the protruding portion 41 and the inner wall surface 11 of the main body 1 are not in contact with each other, so that the chain 51 and the bolt 52 are The swinging means 5 is used to swing the swinging element 4 within the main body 1.

  When vibration is applied to the main body 1, the oscillator 4 swings in the main body 1, and the tip of the projecting portion 41 collides with the inner wall surface of the main body 1, so that the center of gravity of the vibration damping device 10 is The movement due to the swing and the collision energy generated by the collision work in a direction to cancel the vibration acceleration, whereby the vibration acceleration is attenuated and the vibration can be suppressed. Further, since the protrusion 41 of the oscillator 4 collides with the inner wall surface 11 of the main body 1, the shock at the time of collision is transmitted sharply and acceleration is attenuated efficiently, thereby suppressing vibration. The effect is enhanced.

  The protrusions 41 are provided at equal angular intervals and at the same length in a radial manner, so that a good balance can be obtained when the protrusions 41 are suspended from the center of the oscillator 4 by the oscillation means 5. Combined with the fact that 1 is formed in a cylindrical shape, it is possible to perform vibration control corresponding to vibrations from all directions. Furthermore, since the oscillator 4 has substantially the same cross-sectional shape in the vertical direction, the inner wall surface 11 of the main body 1 and the projecting portion 41 can collide with each other in a linearly close range, not a point, The vibration is further suppressed by increasing the collision energy.

  The material of the oscillator 4 is not particularly limited as long as it can swing within the main body 1. However, the oscillator 4 frequently collides with the inner wall surface of the main body 1 due to vibration and is controlled by swinging. The suppression of the vibration due to the movement of the center of gravity of the vibration device 10 is formed by using a metal material having high strength and toughness and high specific gravity because the effect is enhanced as the weight of the oscillator 4 increases. Among them, steel, stainless steel, zinc and the like having particularly large specific gravity can be preferably used. Further, since the rocker 4 also collides with the main body 1, it is preferable to use a metal material such as steel, aluminum, stainless steel, titanium, or zinc having high strength and toughness. When the metal material used for the impact directly collides, it is preferable to use the same metal material as that of the oscillator 4 or a metal material with similar hardness in order to prevent wear due to the collision.

  Also in the second vibration damping device according to the present invention, the main body 1 is filled with a fluid liquid such as silicone oil so that the whole or part of the oscillator 4 is immersed, and the vibration liquid causes a slight vibration. It may be possible to suppress this.

  FIG. 7 is a plan view showing another example of the oscillator 4. (A) is the oscillator 4 provided with three protrusions 41. If three or more protrusions 41 are provided, the protrusions 41 are arranged at equal intervals so that the inside of the main body 1 can be obtained. The distance by which the rocker 4 swings so that the wall surface 11 and the tip of the protrusion 41 collide can be made substantially the same in all directions. It can be easy to control. Further, (b) is provided with six projecting portions 41, and as the projecting portions 41 increase, the inner wall surface 11 and the projecting portions 41 collide with each other so that the distance at which the oscillator 4 swings is all. The direction is nearly the same, and the effect of suppressing the vibration depending on the direction can be made uniform. However, if the number of protrusions 41 increases too much, a plurality of protrusions 41 collide with the inner wall surface 11 at the same time against the vibration. Since there is a possibility that the energy is not sharp, when the protrusions 41 are provided at an equally spaced angle, it is preferable to have about three to six bodies. Further, in the oscillator 4 shown in this figure, the protrusions 41 are provided at equal intervals and at the same length, so that the oscillation means 5 can provide the same as in the embodiment shown in FIG. The main body 1 is swingable in a well-balanced manner.

  FIG. 8 shows still another example of a rocking device of the vibration damping device according to the present invention, in which (a) is a perspective view showing the whole rocking device, and (b) is one in which a vibration damping device is formed. It is a top view. The oscillator 4 has a cross shape in which four protrusions 41 are provided. At the tip of the protrusion 41, when the vibration is applied, a collision with the inner wall surface 11 of the main body 1 can be considered. The elastic body 42 is adhered and attached. The elastic body 42 increases the repulsive force at the time of the collision between the projecting portion 41 and the inner wall surface 11, and increases the reaction after the collision with the inner wall surface 11 of the oscillator 4 to further enhance the damping effect. Has been made. Further, since the protruding portion 41 made of metal 41 does not directly collide with the inner wall surface 11 by the elastic body 42, it is possible to reduce the collision sound when suppressing the vibration and achieve quietness.

  The material used to form the elastic body 42 may be a metal spring material such as a spring spring, a locking spring, a coil spring, and a leaf spring, and natural rubber, butadiene styrene rubber, neoprene, butadiene acrylonitrile, which are less likely to corrode. Rubber, chloroprene polymer, butyl rubber, ethylene propylene terpolymer, urethane resin, polyisobutylene resin, polyethylene resin, ethylene vinyl acetate copolymer, silicon resin, soft vinyl chloride resin, styrene-butadiene, polyolefin, polyester, poly Elastic materials made of various synthetic rubbers such as vinyl chloride-based, polyurethane-based, and polyamide-based elastomers and synthetic resins can be used.

  FIG. 9 is a plan view showing still another example of the oscillator in the vibration damping device according to the present invention. (A) is one in which four protrusions 41 are provided in a cross shape, and a plate-like elastic body 42 is attached so as to sandwich the tip of the protrusion 41. The elastic body 42 is fixed by the bolt B2 inserted through the protruding portion 41 and fastened by the nut N2, so that the elastic body 42 is fixed to the protruding portion 41 much more firmly than by adhesion or the like. When worn out, the bolt B2 and the nut N2 can be removed to be easily replaced with a new elastic body. The bolt B2 and the nut N2 are fastened slightly inside the tip of the elastic body 42 so as not to contact the inner wall surface 11 of the main body 1 when the oscillator 4 swings.

  Further, (b) is formed by using a general-purpose H-shaped steel, and the flange portion tip of the H-shaped section is formed as the protruding portion 41, so that only the H-shaped steel is cut to form the protruding portion 41. No special processing is required, and the oscillator 4 can be formed easily and inexpensively. An elastic body 42 is fixed and attached to the outside of the tip of the projecting portion 41 by a bolt B2 and a nut N2 as in FIG.

  FIG. 10 is a plan view showing still another example of the oscillator in the vibration damping device according to the present invention. In (a), the oscillator 4 is configured such that four elastic bodies 42 are attached around a rod-like body or a tubular body having a circular cross section, and the elastic body 42 also serves as the protruding portion 41. With such a configuration, even when a round bar-shaped member such as a steel pipe is used to form the oscillator 4, the impact of the projecting portion 41 and the inner wall surface 11 of the main body 1 is sharpened while the elastic body 42 is used. A big reaction can be obtained. Further, in (b), the oscillator 4 uses a rod-like body or a tubular body having a rectangular cross section, and its four corners are formed as protrusions 41, and elastic bodies 42 are attached to the outside of the protrusions 41, respectively. is there. With this configuration, the oscillator 4 can be formed easily and inexpensively using a material having a rectangular cross section that is relatively easily available.

  11A and 11B show an example of application of the vibration damping device according to the present invention to a sign post. FIG. 11A is a perspective view showing the vibration damping device to be applied, FIG. 11B is a longitudinal sectional view thereof, and FIG. ) Is an explanatory view showing the state of attachment to the sign post. In (a), the vibration damping device 10 has a cylindrical shape as a whole, a flange 101 is provided in the middle of the vertical direction, and a sheath tube 102 is integrally provided below the flange 101. A push bolt B <b> 3 that can be screwed into the Saya tube 102 is attached around the Saya tube 102. Next, in (b), a rocker 4 having a cross-shaped cross section is placed in the main body 1 by a rocking means 5 comprising a chain 51 and a bolt 52 so that the flange 101 extends to the inside of the main body 1. The bottom surface of the main body 1 is continuously 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. Is set to be larger than the outer diameter of the upper end portion H11 of the vertical column H1, the sheath tube 102 is fitted to the upper end portion H11, and the push bolt B3 is screwed in this state to press the push bolt B3 to the upper end portion 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 can also be used for utility poles, steel towers, towers, water tanks, high-rise buildings, etc. that are erected from the ground surface and are feared to be adversely affected by lateral vibration.

  FIG. 12 shows still another embodiment of the vibration damping device according to the present invention, in which (a) to (c) are perspective views showing the state of formation, and (d) shows the formed vibration damping device. It is a longitudinal cross-sectional view shown. As in FIG. 11, the vibration damping device is the upper end portion H11 of the vertical column of the marker column. In this embodiment, first, as shown in FIG. 11A, the column cap C2 provided on the upper end portion H11 is attached. Remove. The upper end H11 is formed using a cylindrical steel pipe. In the upper end H11, the oscillator 4 with the chain 51 attached is inserted from above as shown in FIG. Next, as shown in (c), bolt holes H12 are formed on both side surfaces of the upper end H11, and the bolts 52 are inserted in the diameter direction. Here, the bolt 52 is also inserted into the chain 51 in the upper end H11, so that the oscillator 4 is swingably provided in the upper end H11 by the chain 51 and the bolt 52. After inserting the bolt 52, the nut is attached, and the support cap C2 is attached to the upper end portion of the upper end portion H11 as it is.

  By such a method, the vibration damping device 10 is formed as shown in FIG. In the vibration damping device 10, the rocker 4 can be swung freely by the rocking means 5, but the main body 1 is also used as the vertical column H <b> 1 (or the upper end H <b> 11). There is no need to provide it, and 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 protrusion 41 of the oscillator 4 collides with the inner surface of the vertical column H1 to suppress the vibration. Since the projecting portion 41 collides with the vicinity of the upper end that does not affect the strength of the sign post so much, there is no problem in terms of strength even if the vibration damping device 10 is provided.

  FIG. 13 is a longitudinal sectional view showing another example of the swinging means in the vibration damping device according to the present invention. For example, as shown in (a), by providing a swinging means 5 as a bearing between the swinger 4 and the inner bottom surface 12 of the main body, the swinger 4 is swung by the rotation of the bearing in the main body 1. It can be movable. Further, as shown in (b), magnets are attached to the lower surface of the oscillator 4 and the inner bottom surface 12 of the main body 1 so that the oscillator 4 is repelled against the magnet MN of one N pole. By attaching the other south pole magnet MS to the oscillating member 4, the oscillating element 4 is lifted by the magnetic force so that it can be freely oscillated in the main body 1.

  The effect of suppressing vibration of the vibration damping device according to the present invention will be described based on the following embodiments.

Example 1
In the cantilever-type marker column shown in FIG. 14, the dimensions (numbers are mm) in the figure are a = 3300, b = 2000, c = 200, d = 3500, and the vertical column has an outer diameter of 114.3 mm. A carbon steel pipe for general structure (STK400) having an outer diameter of 89.1 mm and a wall thickness of 3.2 mm is used as the horizontal beam H2 with a wall thickness of 3.5 mm. Further, a vibration damping device 10 shown in FIG. 15 is attached to the upper end of the vertical column H1 to obtain a marker column according to the present invention of Example 1. In FIG. 15, the dimensions (numbers are in mm) of the vibration damping device 10 are e = 100, f = 28, g = 139.8, h = 3.5, i = 120, j = 16.4, The oscillator 4 is formed using a solid general structural carbon steel (SS400), and the main body 1 is formed using a general structural carbon steel pipe (STK400) having an outer diameter of 139.8 mm and a wall thickness of 3.5 mm.

(Comparative Example 1)
The cantilever-type sign post shown in FIG. 14 is the same as Example 1 except that the vibration damping device 10 is not attached, and the sign post of Comparative Example 1 is used.

As shown by the traction force F in FIG. 14, the generated stress at the measurement point P near the base of the marker column is 300 kgf / cm ^2. Then, the generated stress at the measurement point P when the traction force F was released instantaneously was measured using a strain gauge for 25 seconds. The result is shown in FIG.

  In FIG. 16, (a) is Example 1 and (b) is the transition of the generated stress in the marker column of Comparative Example 1, whereas the generated stress in Comparative Example 1 is hardly attenuated after 25 seconds, The generated stress in Example 1 has already attenuated to about ¼ in 3 to 4 seconds immediately after the opening of the traction force F, and the vibration of the vertical column H1 is suppressed by attaching the vibration damping device 10, and the vicinity of the base portion It is remarkably shown that the generated stress in is greatly reduced.

(Example 2)
In the cantilever-type marker column shown in FIG. 14, the dimensions (numbers are mm) in the figure are a = 4500, b = 2320, c = 250, d = 5000, and the vertical column has an outer diameter of 190.7 mm. The carbon steel pipe for general structure (STK400) having an outer diameter of 114.3 mm and a wall thickness of 3.5 mm is used for the wall beam H2 with a wall thickness of 5.3 mm. Further, a vibration damping device 10 shown in FIG. 15 is attached to the upper end of the vertical column H1 to form a marker column according to the present invention of Example 2. In FIG. 15, the dimensions (numbers in mm) of the vibration damping device 10 are e = 173, f = 19, g = 216.3, h = 4.5, i = 170, j = 17.2, The oscillator 4 is formed of a solid general structural carbon steel (SS400), and the main body 1 is formed of a general structural carbon steel pipe (STK400) having an outer diameter of 216.3 mm and a wall thickness of 4.5 mm.

(Comparative Example 2)
The cantilever-type sign post shown in FIG. 14 is the same as Example 1 except that the vibration damping device 10 is not attached, and the sign post of Comparative Example 2 is used.

  The marker pillars of Example 2 and Comparative Example 2 were erected by firmly fixing them using anchor bolts on the side edges of the span center of a steel bridge road having a span length of 18000 mm. Place a 100mm square sleeper in the crossing direction of the road at the point where the sign pillar is installed on the steel bridge road, and run it on the sleeper by driving a forklift with a weight of 3.7t. The vibration was generated. The maximum value of the top amplitude at that time and the maximum value of the generated stress at the measurement point in the vicinity of the base (measurement point P shown in FIG. 14 where c = 250) were measured. The results are shown in Table 1.

(Table 1)

  In Example 2 and Comparative Example 2, the peak amplitude amount is 5 times or more, and the generated stress is nearly 3 times higher in Comparative Example 2. If the vibration damping device 10 according to the present invention is applied, It has been remarkably shown that by suppressing the vibration of the column, the generated stress in the vicinity of the base that is most likely to be damaged in the marker column can be greatly reduced, and the durability of the marker column can be enhanced.

It is explanatory drawing which shows 1st embodiment of the 1st damping device concerning this invention. It is a top view which shows the example of a deformation | transformation of the partition plate in 1st embodiment. It is a partially broken figure which shows the example of a further deformation | transformation of the partition plate in 1st embodiment. It is a partially broken figure which shows 2nd embodiment of the 1st damping device concerning this invention. It is a partially broken figure which shows 3rd embodiment of the 1st damping device concerning this invention. It is explanatory drawing which shows one Embodiment of the 2nd damping device concerning this invention. It is explanatory drawing which shows the other example of the rocker in the 2nd damping device concerning this invention. It is explanatory drawing which shows the further another example of the rocker in the 2nd damping device concerning this invention. It is a top view which shows the further another example of the oscillator in the 2nd damping device concerning this invention. It is a top view which shows the further another example of the oscillator in the 2nd damping device concerning this invention. It is explanatory drawing which shows the example of application to the marker pillar of the damping device concerning this invention. It is explanatory drawing which shows other embodiment of the 2nd damping device concerning this invention. It is a longitudinal cross-sectional view which shows the other example of the rocking | swiveling means of the 2nd damping device concerning this invention. It is the schematic which shows the marker pillar used for the Example of the 2nd damping device concerning this invention. It is the schematic which shows the 2nd damping device concerning this invention used for the Example. It is a graph which compares the Example and comparative example of the 2nd damping device concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 11 Inner wall surface 2 Fluid liquid 3 Partition plate 4 Oscillator 41 Protrusion part 42 Elastic body 5 Oscillating means 10 Damping device S Gap H Marking column

Claims (7)

A vibration damping device, characterized in that a partition plate is provided in a main body containing a fluid liquid, and a gap is formed in a part of the partition plate so that the fluid liquid can pass therethrough. 2. The vibration damping device according to claim 1, wherein the partition plate is swingably provided in the main body and is capable of colliding with the inner wall surface of the main body when swinging. The vibration damping device according to claim 1, wherein the partition plate is provided to be suspended from above the main body. A cylindrical main body, a rocker whose cross-sectional shape is substantially the same in the vertical direction, and rocking means for swinging the rocker are provided, and the rocker is rocked by the rocking means. A vibration damping device, wherein the vibration control device is placed in the main body in a movable state, and three or more protrusions are provided on the oscillator. 5. The vibration damping device according to claim 4, wherein at least a portion where the collision with the inner wall surface of the main body can be considered is formed of an elastic body. A sign post and an illumination post provided with the vibration damping device according to claim 1. The sign pillar and the illumination pillar according to claim 6, wherein a part of the sign pillar or the illumination pillar serves as a main body of the vibration damping device.