JP2012246998A - Vibration damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress unstable three-dimensional variations even though a controllable range of vibrations is expanded and a vibration transmission material is arranged on the vertically upper side from an object to be damped.SOLUTION: A vibration damping device 50 consists of a curved rope member 13, a first base body 1 containing a first fixed part 2 fixed to a vibration transmission member, and a second base body 21 containing a second fixed part 22 fixed to an object to be damped. The second fixed part 22 is situated on a vertically lower side from the first fixed part 2. The first base body 1 and second base body 21 have a first inner fixing part 5 and a second inner fixing part 25, respectively. The curved rope member 13 is fixed to the first inner fixing part 5 and second inner fixing part 25.

Description

  The present invention relates to a vibration damping device that suppresses vibration of a structure.

  Fixed structures such as wooden buildings, high-rise buildings, industrial machinery, bridges, elevated roads and railroad tracks, and moving structures such as vehicles, aircraft, ships, etc. are subjected to external forces due to earthquakes, strong winds, vehicle running, etc. Vibrate according to. In addition, moving structures and industrial machines vibrate due to various factors during movement or operation.

  2. Description of the Related Art Conventionally, a technique for suppressing vibration generated in such a structure is known. For example, a device called TMD (Tuned Mass Damper) is known as a device that suppresses vibrations caused by earthquakes, strong winds, and the like of wooden buildings and high-rise buildings. This device is composed of a weight and an elastic support member that supports the weight in a freely vibrating manner. The weight of the weight and the spring constant of the elastic support member are set so that the vibration period of the weight is substantially the same as the natural vibration period of the structure. Has been adjusted. Regarding such TMD, for example, Patent Document 1 discloses an apparatus configured such that each of a plurality of weights vibrates at the same vibration period as a plurality of natural vibration periods of a structure.

  In addition, there are techniques disclosed in Patent Documents 2, 3, and 4 as techniques aimed at suppressing vibrations generated in the structure. Patent Document 2 discloses a pendulum control device in which a pendulum and a slope supporting the weight of the pendulum are arranged symmetrically. Patent Document 3 discloses a vibration control structure in which a vibration control device is installed as a pair in accordance with a roof ridge structure. Patent Document 4 discloses a bamboo dam spring-like vibration damping device.

JP-A-4-49387 JP-A-7-324518 Japanese Patent No. 3484535 JP 2000-283227 A JP 2011-27165 A

  According to the above-described conventional technology, it is possible to suppress vibration generated in a fixed structure or vibration generated in a moving structure due to an earthquake or strong wind.

  However, in the devices disclosed in Patent Documents 1, 2, and 3, two-dimensional horizontal vibrations (hereinafter “horizontal vibration”) in which the structure moves along a horizontal plane due to the structure of the member for damping the vibrations. It is extremely difficult to suppress vertical vibration (hereinafter referred to as “vertical vibration”) in which the structure moves in the height direction.

  In addition, the device disclosed in Patent Document 4 is configured such that the bamboo spring for damping vibration expands and contracts along the axial direction, so that only vibration along the axial direction can be suppressed. There wasn't.

  In other words, in the above-described prior art, when the direction of vibration is limited and the structure of the device supports the vibration, the expected vibration suppression effect can be obtained. There was a problem that it could not be obtained.

  However, vibrations generated by fixed earthquakes and moving structures due to earthquakes, vibrations generated by moving vehicles, etc., and vibrations generated by bridges as vehicles travel are three-dimensional, combining horizontal and vertical vibrations. In some cases, the vibration is a specific vibration and the moving direction of the structure is not fixed (hereinafter referred to as “indefinite three-dimensional vibration”). In particular, vibrations generated in fixed structures and moving structures due to earthquakes are often indefinite three-dimensional vibrations, and it is difficult to accurately adapt the structure of a device that suppresses vibrations to vibrations caused by earthquakes.

  On the other hand, as a device capable of suppressing indefinite three-dimensional vibration, a vibration damping device disclosed in Patent Document 5 has been conventionally known.

  However, this vibration damping device has a structure in which the helical structure is bent by causing the gravity applied to the object to be controlled and the gravity applied to the weight to act from the upper side in the vertical direction. When operating the vibration control device, fix it mainly on the floor of a wooden house, or install a vibration control device on a horizontal table and place a vibration control object such as a precision machine on the upper side. Was only expected. In a conventional vibration damping device, when a member (also referred to as a “vibration transmission member”) serving as a transmission source of indefinite three-dimensional vibration is the same as the vibration suppression object (for example, a building such as a wooden house itself is the Or when the vibration transmission member is arranged vertically below the object to be damped (for example, when a server as a vibration damping object is installed on the floor of a building that is a vibration transmission member) ).

  For this reason, for example, security equipment fixed to the ceiling or wall of vehicles or buildings, precision machines such as surveillance cameras, and structures such as ducts and air conditioners fixed to the ceiling or wall are conventional controls. Uncertain three-dimensional vibration could not be suppressed by the vibration device. For example, in the case of a security camera or surveillance camera, the ceiling or wall surface of a vehicle or building is often a vibration transmission member, and the vibration transmission member is located below the security camera or surveillance camera that is the object to be controlled in the vertical direction. It is rarely placed.

  Thus, the range of vibrations that can be suppressed is limited in the prior art, and there is a problem that it is extremely difficult to suppress indefinite three-dimensional vibrations for both fixed structures and moving structures.

  Further, in the prior art, when the installation form capable of suppressing the indefinite three-dimensional vibration of the vibration control object is limited, and the vibration transmitting member is arranged on the upper side in the vertical direction than the vibration control object, the indeterminacy Three-dimensional vibration could not be suppressed.

  Accordingly, the present invention has been made to solve the above-described problems, and in a vibration damping device that suppresses vibrations of a structure, the range of vibrations that can be suppressed is expanded, and the vibration transmission member is more vertical than the vibration suppression object. An object of the present invention is to suppress indefinite three-dimensional vibration in the case of being arranged on the upper side of the direction.

  In order to solve the above-mentioned problems, the present invention provides a curved cable member having a curved portion obtained by bending a cable member formed by combining a plurality of linear members, and a first fixed to a vibration transmission member serving as a vibration transmission source. The first base body and the second base body having a first base body having a fixed portion and a second base body having a second fixed portion to which the object to be controlled is fixed are provided. Is arranged such that the second fixing part is positioned below the vertical direction with respect to the first fixing part, and the first base body is positioned below the vertical direction with respect to the first fixing part. The second base body has a second inner fixing portion arranged so as to be positioned above the second fixing portion in the vertical direction. The curved cable member is stored in the storage space sandwiched between the first inner fixing portion and the second inner fixing portion, and the bending portion stands upright. Curved cord member is characterized damping devices fixed to the first inner fixed portion and the second inner fixed portion.

  In this vibration damping device, the curved cable member is housed in the storage space and is fixed to the first inner fixing portion and the second inner fixing portion. The first fixing portion disposed on the upper side in the vertical direction from the first inner fixing portion is fixed to the vibration transmitting member, and the second fixing portion is disposed on the lower side in the vertical direction from the second inner fixing portion. Since the vibration control object is fixed to the fixed portion, the vibration transmitting member is arranged above the vibration control object in the vertical direction.

  In the case of the vibration damping device, the first inner fixing portion and the second inner fixing portion are engaged with each other, and the distance between the first inner fixing portion and the second inner fixing portion is determined by a predetermined size. It is preferable to further include an interval restricting member for restricting to a small size.

  In this vibration damping device, since the interval regulating member regulates the interval between the first inner fixing portion and the second inner fixing portion to a size smaller than the predetermined size, the deformation state of the bending portion in the bending cord member is reduced. Becomes smaller than a certain level.

  Further, in the vibration damping device, both one end and the other end are fixed to the second fixing portion, and an intermediate portion located between the one end and the other end crosses the first fixing portion. Thus, it is preferable to further have an elastic band made of an elastic member attached to the first base body and the second base body.

  In this vibration damping device, since the elastic band exhibits a restoring force to return to its original shape, the first base body is returned to the original position by the elastic band even if the first base body moves together with the vibration transmitting member. Pulled back.

  Furthermore, in the above vibration damping device, it is preferable that two elastic bands are provided and attached to the first base body and the second base body so that the respective elastic bands are orthogonal to each other.

  In this vibration damping device, the first base body is pulled back to the original position in almost the same manner by the two elastic bands, regardless of which direction the first base body moves together with the vibration transmitting member.

  Furthermore, in the vibration damping device, a groove portion corresponding to the shape of the elastic band is formed on the surface of the first fixed portion, and the elastic band can be accommodated in the groove portion.

  Further, the first base body and the second base body surround the first inner fixing portion and the second inner fixing portion and are formed so as to face each other and the first peripheral side portion and the second base portion, respectively. It is preferable to have each peripheral side part.

  Moreover, the space | interval control member can be comprised so that it can expand-contract along the perpendicular direction when the 1st fixing | fixed part is fixed to a vibration member.

  In any of the above vibration damping devices, the interval regulating member can have a chain structure in which a plurality of metal ring members are connected in a chain.

  In the case of the vibration damping device, the first inner fixing portion has an opening at the center and is disposed so as to face the first fixing portion, and the first base body has the first inner fixing portion. The first inner fixing portion includes a first peripheral side portion that surrounds the fixing portion and is formed so as to connect the first fixing portion and the first inner fixing portion. The second base body is inserted through the opening of the first inner fixing portion and connects the second inner fixing portion and the second fixing portion. It can be made to have a connection part.

  As described above in detail, according to the present invention, in the vibration damping device that suppresses the vibration of the structure, the range of the vibration that can be suppressed is expanded, and the vibration transmitting member is located above the vibration suppression object in the vertical direction. About the case where it arrange | positions, it can enable it to suppress indefinite three-dimensional vibration.

It is a perspective view which shows the structure of the damping device which concerns on the 1st Embodiment of this invention. It is a top view which similarly shows the structure of a damping device. FIG. 3 is a cross-sectional view of the vibration damping device of FIG. 1 taken along line 3-3 in FIG. It is a perspective view which shows an example of a base body. It is a side view of the vibration damping device of FIG. It is a back view similarly. It is the perspective view which abbreviate | omitted partially which shows a base body and a spring structure. It is the perspective view which abbreviate | omitted partially which shows two base bodies and a chain ring member. It is sectional drawing similar to FIG. 3 which shows an example of the use condition of the damping device of FIG. 9 is a cross-sectional view similar to FIG. 3 showing a state in which the vibration transmitting member has moved upward. Similarly, it is sectional drawing similar to FIG. 3 which shows the state which the vibration transmission member moved to left direction. The change of the length in a spring structure is shown, (a) is a figure which shows the case where a wire spring has extended fully, (b) is a figure which shows just before a wire spring has extended fully. It is the perspective view which abbreviate | omitted partially which shows the base body and spring structure which concern on a modification. It is sectional drawing which shows the structure of the damping device which concerns on the 2nd Embodiment of this invention. It is a top view which shows the base body which comprises the damping device of FIG. 14, and a helical structure. (a) is a side view which shows an example of a helical structure, (b) is a front view similarly. It is sectional drawing which shows an example of a rope member. It is sectional drawing which shows an example of the use condition of the damping device which concerns on the 3rd Embodiment of this invention. It is a top view which shows another wire spring. It is the front view which abbreviate | omitted one part which shows the principal part inside a railway vehicle. It is sectional drawing which shows an example of the installation state of the damping device which concerns on the 4th Embodiment of this invention. (A) is a perspective view which shows the chain ring member which concerns on a modification, (b) is sectional drawing which shows an expansion-contraction unit.

  Embodiments of the present invention will be described below. In addition, the same code | symbol is used for the same element and the overlapping description is abbreviate | omitted.

First Embodiment (Configuration of Vibration Suppression Device)
First, the configuration of the vibration damping device according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing the configuration of the vibration damping device 50 according to the first embodiment of the present invention, and FIG. 2 is a plan view showing the configuration of the vibration damping device 50 in the same manner. 3 is a sectional view taken along line 3-3 in FIG. 2, and FIG. 4 is a perspective view of the base body 1. As shown in FIG. 5 is a side view of the vibration damping device 50, and FIG. 7 is a partially omitted perspective view showing the base body 21 and the spring structure 10, and FIG. 8 is a partially omitted perspective view showing the base body 1, the base body 21, and the chain ring member 40.

  As shown in FIGS. 1 to 8, the vibration damping device 50 includes a base body 1, a base body 21, four spring structures 10, rubber bands 31 and 32, and a chain ring member 40. The vibration damping device 50 dampens structures such as security cameras that are fixed in a suspended state on the ceiling of a railway vehicle, and structures that are fixed to the ceiling or wall surface of a building such as a duct or an air conditioner. Used when the object is used. In the vibration damping device 50, the base body 1 and the base body 21 are arranged such that the fixing portion 22 is located below the fixing portion 2 in the vertical direction.

  The base body 1 corresponds to the first base body in the present invention, and is configured using a metal such as steel, a resin material such as acrylic resin, fiber reinforced plastics (FRP), or the like. The base body 1 has a bottomed cylindrical structure with a low height, and includes a fixing portion 2, a peripheral side portion 3, and an inner fixing portion 5.

  The fixing portion 2 corresponds to the first fixing portion in the present invention, and as shown in detail in FIGS. 1, 2, 4 and the like, a thick disk-like shape having a size corresponding to the vibration control object It corresponds to the outer surface portion of the member. The fixing portion 2 is formed flat except for a portion where a groove portion 4 described later is formed. The fixed portion 2 is a portion that is fixed to a vibration transmission member that serves as a vibration transmission source, such as a ceiling of a railway vehicle.

  Two grooves 4 are formed on the surface of the fixed portion 2. Each groove portion 4 is formed so as to cross the fixing portion 2 through the center of the fixing portion 2 and intersects in a cross shape at the center portion. Each groove part 4 is formed in the size according to the shape of rubber bands 31 and 32, respectively. Further, when the rubber bands 31 and 32 are placed in the respective groove portions 4, the depth of each groove portion 4 is set so that the rubber bands 31 and 32 do not protrude outward from the surface of the fixing portion 2. And a depth corresponding to the thickness obtained by adding the thickness of the rubber band 32.

  The peripheral side portion 3 is formed on the back surface side of the fixed portion 2 so as to be orthogonal to the fixed portion 2 and the inner fixed portion 5 and to surround the inner fixed portion 5. The peripheral side portion 3 is formed so as to face a peripheral side portion 23 (described later) of the base body 21.

  The inner fixing portion 5 corresponds to the first inner fixing portion in the present invention. The inner fixing portion 5 is a back surface portion of the fixing portion 2, that is, a surface portion inside the peripheral side portion 3 of the thick disk-shaped member described above, and in the base body 1, the inner fixing portion 5 is perpendicular to the fixing portion 2. It is the part arrange | positioned so that it may be located below.

  Almost the entire inner fixing portion 5 is formed flat. Four spring structures 10 as shown in detail in FIG. 7 are fixed to the inner fixing portion 5, and a chain ring member 40 as shown in detail in FIG. 8 is engaged therewith. Further, as shown in FIG. 8, an insertion hole 5 a is formed in the inner fixing portion 5. The insertion hole 5a is formed in a shape corresponding to an annular portion of a metal ring 41 described later. The metal ring 41 is inserted here, and the metal ring 41 is engaged with the inner fixing portion 5.

  Next, the base body 21 will be described. The base body 21 corresponds to the second base body in the present invention, and is configured using a metal such as steel, a resin material such as an acrylic resin, FRP, or the like, similar to the base body 1. The base body 21 has a bottomed cylindrical structure similar to the base body 1, and includes a fixing portion 22, a peripheral side portion 23, and an inner fixing portion 25.

  The fixing portion 22 corresponds to the second fixing portion in the present invention, and corresponds to the outer surface portion of the thick disk-shaped member, as shown in detail in FIGS. The entire fixing portion 22 is formed flat. The fixing portion 22 is a portion to which a vibration suppression object to be subjected to vibration suppression, for example, a security camera attached to a railway vehicle, a duct, or the like is fixed.

  In the fixing portion 22, one end 31 a and the other end 31 a of the rubber band 31 and one end 32 a and the other end 32 a of the rubber band 32 are fixed using screws 33. And the circular fixed zone 24 is arrange | positioned inside the part to which the one end part 31a, the other end part 31a, etc. are fixed. The fixed zone 24 is formed in a size corresponding to the size of the vibration control object. A security camera 200 described later is fixed to the fixed zone 24.

  The peripheral side portion 23 is formed on the back surface side of the fixing portion 22 so as to be orthogonal to the fixing portion 22 and the inner fixing portion 25 and to surround the inner fixing portion 25. The peripheral side portion 23 is formed to face the peripheral side portion 3 of the base body 1 described above.

  The inner fixing portion 25 corresponds to the second inner fixing portion in the present invention. The inner fixing portion 25 is a back surface portion of the fixing portion 22, that is, a surface portion on the inner side of the peripheral side portion 23 of the thick disk-shaped member, and is above the fixing portion 22 in the vertical direction in the base body 21. It is the part arrange | positioned so that it may be located.

  The inner fixing portion 25 is substantially flat as in the inner fixing portion 5. Similar to the inner fixing portion 5, the four spring structures 10 are fixed to the inner fixing portion 25, and the chain ring member 40 is engaged. Further, as shown in FIG. 8, the inner fixing portion 25 is formed with an insertion hole 25a. The insertion hole 25 a is formed in a shape corresponding to the annular portion of the metal ring 41. Here, a metal ring 41 different from the inner fixing part 5 is inserted, and the metal ring 41 is engaged with the inner fixing part 25. The insertion hole 25a and the above-described insertion hole 5a are formed at positions that overlap each other, and are formed at positions that can be aligned along the vertical direction when the fixing portion 2 of the base body 1 is fixed to the vibration transmitting member. Has been.

  Next, the spring structure 10 will be described. As shown in FIGS. 3 and 7, the spring structure 10 includes spring mounting members 11 and 12 and a wire spring 13. The spring structure 10 is stored in a storage space 19 formed by the base body 1 and the base body 21. The storage space 19 is a cylindrical space formed by facing the inner fixing portion 5 and the inner fixing portion 25 and surrounded by the inner fixing portion 5, the inner fixing portion 25, the peripheral side portion 3, and the peripheral side portion 23. is there.

  The spring mounting member 11 is a rectangular plate material, and an insertion hole is formed at one end in the longitudinal direction as shown in FIG. The insertion hole has a size corresponding to the thickness of the wire spring 13 and is formed so as to penetrate the spring mounting member 11 along the short direction. Two fixing holes are formed on the opposite side of the insertion hole. One end and the other end of the wire spring 13 are inserted and fixed in each fixing hole. The spring mounting member 11 is fixed to the inner fixing portion 25 using bolts 14.

  The spring mounting member 12 is a rectangular plate material, and insertion holes are formed at both ends in the short direction. Each insertion hole has a size corresponding to the thickness of the wire spring 13 and is formed so as to penetrate the spring mounting member 12 along the longitudinal direction. The spring mounting member 12 is fixed to the inner fixing portion 5 using a bolt 15.

  The wire spring 13 is a curved cable member in the present invention, and has two curved portions 13a. The curved portion 13a is a portion that is formed in a generally annular shape by appropriately bending a cord member 16 to be described later, and stands up with respect to the inner fixing portion 25 and the inner fixing portion 5 as shown in FIGS. ing.

  In the spring structure 10, one end portion and the other end portion of the rope member 16 are inserted and fixed in the fixing holes of the spring mounting member 11, and an intermediate portion of the fixed portion is a spring. The spring mounting members 11 and 12 are mounted on the intermediate portion of the rope member 16 by being inserted through the insertion hole of the mounting member 12 and further through the insertion hole of the spring mounting member 11, and as shown in FIG. Two curved portions 13a are formed.

  Further, the spring mounting members 11 and 12 are respectively fixed to the inner fixing portion 25 and the inner fixing portion 5, and thereby, the inner fixing portion 25 and the inner fixing portion 5 are arranged so that the two bending portions 13 a stand up. A wire spring 13 is fixed.

  In the wire spring 13, the cord member 16 is an elastic member having strong elasticity, and the curved portion 13 a is formed using such a cord member 16. And the bending part 13a exhibits the restoring force which tries to return to an original shape, when a change of a shape arises.

  As shown in FIG. 17, the cord member 16 is composed of a plurality of linear members 64 having a circular cross section (19 in FIG. 8) to form unit rope members 65, and a plurality of unit rope members 65 (in FIG. 17). 7) and are formed by twisting together. The rope member 16 according to the present embodiment is a steel rope and has strong elasticity. Note that a total of 133 linear members 64 are combined in the rope member 16 shown in FIG.

  Next, the rubber bands 31 and 32 will be described. The rubber bands 31 and 32 both correspond to the elastic band in the present invention. The rubber bands 31 and 32 are so-called rubber strings used in dressmaking, handicrafts, etc., and are members coated with rubber with a thread, and the cross section in the width direction is formed in a substantially rectangular shape. In the present embodiment, it is assumed that rubber bands are used as the rubber bands 31 and 32, but flat rubber having a rectangular cross section that is not coated with a thread may be used. Further, as the rubber bands 31 and 32, rubber tubes obtained by forming rubber into a tube shape may be used, or rubber ropes formed into a circular cross section may be used.

  The rubber bands 31 and 32 are attached to the base body 1 and the base body 21 as shown in FIGS. In this case, the rubber bands 31 and 32 have one end portions 31a and 32a and the other end portions 31a and 32a fixed to the fixing portion 22 using screws 33, and intermediate portions 31b and 32b positioned in the middle thereof are fixed. Crossing part 2. The intermediate portions 31b and 32b are received in the groove portion 4 of the fixed portion 2 and are orthogonal to each other.

  Further, the chain ring member 40 will be described. The chain ring member 40 corresponds to the interval regulating member according to the present invention, and has a function of regulating the interval between the inner fixing portion 5 and the inner fixing portion 25 to a size smaller than a predetermined size. As shown in FIGS. 3 and 8, the chain ring member 40 is configured using three metal rings 41. Each metal ring 41 is connected in a chain form by mutually engaging the annular portions one by one.

  In the chain ring member 40, the two metal rings 41 on both sides except for the middle are engaged with the inner fixing portion 5 and the inner fixing portion 25, respectively. The metal rings 41 are respectively inserted into the insertion holes 5a of the inner fixing portion 5 and the insertion holes 25a of the inner fixing portion 25, and the respective metal rings 41 are engaged with the inner fixing portion 5 and the inner fixing portion 25, respectively. Yes.

  As described above, the insertion holes 5a and 25a are formed at positions where they are aligned along the vertical direction, and the annular portions of the metal rings 41 are engaged with each other. The chain ring member 40 can be expanded and contracted along the vertical direction by changing the engagement state between the metal rings 41, and the engagement state with respect to the inner fixing part 5 and the inner fixing part 25 can be changed. It has a structure that can move even in an oblique direction.

  The chain ring member 40 will be further described with reference to FIG. First, it is assumed that the base body 1 has moved upward as vibration is generated in the vibration transmitting member. In this case, since the spring structure 10 is fixed to the inner fixing portion 5 of the base body 1, the wire spring 13 of the spring structure 10 is pulled upward as the base body 1 moves. When the spring structure 10 is fully extended upward as shown in FIG. 12A, there is no room for further extension. Then, when the base body 1 further moves upward, the gravity applied to the base body 21 and the gravity applied to the vibration suppression object act on the extended spring structure 10, so that the vibration damping device 50 is damaged. There is a risk. Therefore, in the vibration damping device 50, it is preferable that the wire spring 13 of the spring structure 10 is not extended completely. In the vibration damping device 50, the chain ring member 40 restricts the distance between the inner fixing portion 5 and the inner fixing portion 25 to a size smaller than a predetermined size so as not to be so.

  Here, as shown in FIG. 12A, the wire between the end 3 a farthest from the inner fixing portion 5 of the peripheral side portion 3 and the end 23 a farthest from the inner fixing portion 25 of the peripheral side portion 23. The vertical distance when the spring 13 is fully extended is defined as h1. And as shown in FIG.12 (b), the vertical interval of the edge part 3a and the edge part 23a is the vertical gap h2 (h2 is smaller than h1, and h2 <h1) just before the wire spring 13 extends. When it becomes, the length of the chain ring member 40 is set so that the length becomes the longest. In other words, in the vibration damping device 50, the vertical distance between the inner fixing part 5 and the inner fixing part 25 when the vertical distance between the end part 3a and the end part 23a is h2 is S, and the longest chain ring member 40 is provided. The diameter of the metal ring 41 is set so that the length is S.

(Operation details of vibration control device)
Next, the operation content of the vibration damping device 50 having the above configuration will be described with reference to FIGS. The vibration damping device 50 is used in a state in which the base body 21 is disposed so as to be positioned below the base body 1 in the vertical direction.

  For example, as shown in FIG. 9, the fixing portion 2 of the base body 1 is fixed to the ceiling 199 of the railway vehicle. A groove portion 4 is formed in the fixing portion 2, and the depth of the groove portion 4 is a depth corresponding to a thickness obtained by adding the thickness of the rubber band 31 and the thickness of the rubber band 32. The rubber bands 31 and 32 are contained in the inside. Therefore, even if the rubber bands 31 and 32 are attached to the base body 1 and the base body 21, the fixing portion 2 is flat, so that the vibration damping device 50 can be firmly fixed to the ceiling 199.

  On the other hand, the security camera 200 as a vibration suppression object is fixed to the fixing portion 22 of the base body 21. In this case, as shown in FIG. 9, the mounting portion 201 of the security camera 200 is fixed to the fixing zone 24 of the fixing portion 22 using a screw 202.

  The ceiling 199 is a railcar ceiling. Railway vehicles generate rolls and pitches while traveling, and the direction of vibration is not fixed, so that indefinite three-dimensional vibration occurs. When the security camera 200 is directly fixed to the ceiling 199 of such a railway vehicle, the indefinite three-dimensional vibration is transmitted from the ceiling 199 to the security camera 200. If the security camera 200 continues to receive indefinite three-dimensional vibration, there is a risk of damage or failure. In addition, the image quality is unavoidable, for example, the image is unsightly due to irregularities caused by irregular shaking in the captured image.

  Therefore, it is desirable for the security camera 200 to suppress indefinite three-dimensional vibration. The ceiling 199 corresponds to a vibration transmission member serving as a vibration transmission source, and the security camera 200 corresponds to a vibration suppression object.

  Since the spring structure 10 is fixed to the inner fixing portion 5 and the inner fixing portion 25, when the security camera 200 is fixed to the vibration control device 50, the gravity applied to the security camera 200 and the gravity applied to the base body 21 are springs. The spring structure 10 is stretched by acting on the structure 10, and the end 3a and the end 23a are separated from each other, so that a gap is formed between them. In the following description, this state is a reference state without vibration.

  On the other hand, if the distance between the end portion 3a and the end portion 23a becomes h2 described above, the length of the chain ring member 40 becomes the longest, and the spring structure 10 cannot be extended further up and down. Then, even if the length of the spring structure 10 can be reduced (the spring structure 10 can be crushed), it cannot be extended, and the deformation tolerance of the spring structure 10 is reduced. Since the spring structure 10 exhibits a vibration absorbing action due to the deformation of the wire spring 13, the vibration absorbing action by the spring structure 10 is diminished. Therefore, the distance between the end portion 3a and the end portion 23a is set to be larger than 0 and smaller than h2 in the reference state according to the weight of the security camera 200, so that the thickness of the rope member 16 is increased. The sheath strength, the size and weight of the base body 21 are set. By doing in this way, about the spring structure 10, since length can be shortened and extended, the vibration absorption effect | action by the spring structure 10 comes to be exhibited effectively.

  Then, it is assumed that a longitudinal vibration that moves upward is generated in the traveling railway vehicle. Then, as shown in FIG. 10, the ceiling 199 moves upward with the vibration. Since the fixing portion 2 of the base body 1 is fixed to the ceiling 199, the fixing portion 2 of the base body 1 also moves upward as the ceiling 199 moves upward. Further, since the fixing portion 2 and the inner fixing portion 5 are integrated to form the base body 1, the inner fixing portion 5 also moves upward along with the fixing portion 2. Since the spring structure 10 is fixed to the inner fixing portion 5, the spring structure 10 is stretched upward, and the distance between the end portion 3a and the end portion 23a becomes d1 larger than the reference state.

  However, since the spring structure 10 has the wire spring 13, and the wire spring 13 is fixed to the inner fixing portion 5 so that the bending portion 13 a stands up, the external force that causes the movement of the fixing portion 2. Is added to the two curved portions 13 a of the wire spring 13 through the spring mounting member 12.

  At this time, since the wire spring 13 has the curved portion 13a, it has elasticity, and when it is deformed by an external force, it exerts a restoring force to return to its original shape. Each bending portion 13a is deformed by inclining or bending depending on the direction and magnitude of the applied external force, but at the same time, it generates a restoring force and moves to cancel the change.

  On the other hand, the wire spring 13 is configured using a cord member 16. The rope member 16 is formed by combining a large number of linear members 64. Therefore, when the bending portion 13a moves as described above, adjacent ones of the linear members 64 rub against each other and generate heat. That is, the wire spring 13 has a heat conversion function for converting the applied external force into heat. By deforming according to the direction and magnitude of the external force applied by the bending portion 13a, and generating heat accordingly, the external force applied by the wire spring 13 is absorbed.

  Since the linear member 64 has a circular cross section, adjacent ones are in contact with each other and a large number of gaps are formed therebetween. Therefore, the heat generated by the linear member 64 is diffused into the air and released into the air without being retained in the spring structure 10.

  In addition, in the vibration damping device 50, rubber bands 31 and 32 are attached to the base body 1 and the base body 21. The rubber bands 31, 32 have one end portions 31 a, 32 a and the other end portions 31 a, 32 a fixed to the fixed portion 22, while the intermediate portions 31 b, 32 b cross the fixed portion 2, The base body 21 is attached. Therefore, the rubber bands 31 and 32 are extended with the movement of the fixed portion 2 as described above, and both lengths are increased. And since the rubber bands 31 and 32 are formed using the elastic member, the restoring force which tries to return to the original length is exhibited. Then, the rubber bands 31 and 32 exert a force for returning the base body 1 moved upward to the original position, and as a result, the base body 1 is returned downward. Then, the upward external force acting on the base body 1 is canceled out by the restoring force of the rubber bands 31 and 32. Therefore, the upward external force transmitted to the security camera 200 is reduced, and a vibration absorbing effect is obtained.

  In addition, since the rubber bands 31 and 32 are mounted on the base body 1 and the base body 21 so as to be orthogonal to each other, the restoring force of the rubber bands 31 and 32 is maintained regardless of the direction in which the base body 1 moves together with the ceiling 199. Since it is exhibited in substantially the same manner, the base body 1 is pulled back to the original position in substantially the same manner.

  By the way, although the security camera 200 is fixed to the fixing portion 22 of the base body 21, the base body 21 is connected to the base body 1 through the spring structure 10, the rubber bands 31 and 32, and the chain ring member 40. Yes. Therefore, even if the base body 1 moves upward, the external force that caused the movement is transmitted to the base body 21 via the spring structure 10, the rubber bands 31, 32, and the chain ring member 40. Will never be transmitted directly.

  The spring structure 10 has a vibration absorbing action by the heat conversion function as described above. In addition, the rubber bands 31 and 32 exert a vibration absorbing action by a restoring force, so that the base body 1 is moved upward. The external force that caused the movement of is absorbed by the spring structure 10 and the rubber bands 31 and 32. Therefore, the external force is transmitted to the security camera 200 after being attenuated by the spring structure 10 and the rubber bands 31 and 32. Thus, an effect of absorbing upward vibration is obtained, and upward external force transmitted to the security camera 200 is suppressed by the vibration damping device 50.

  Further, since the vertical distance between the end portion 3a and the end portion 23a is set to be larger than 0 in the reference state, the spring structure 10 is deformed even when vibration that moves the base body 1 downward occurs. Therefore, also in this case, the vibration absorption effect by the vibration damping device 50 can be reliably obtained.

  Thus, even if an upward or downward vibration occurs in the vehicle to which the security camera 200 is attached, the vibration is transmitted to the security camera 200 after being attenuated (approximately 80% attenuation). The risk of failure or breakage of the security camera 200 is significantly reduced. Further, by transmitting the vibration after being attenuated, the disturbance of the image taken by the security camera 200 is also significantly reduced, and thus the effect of significantly improving the image quality and accuracy of the image can be obtained. Further, the vibration is attenuated, which makes it easier for the security camera 200 to focus, and in this respect as well, an improvement in image quality of the captured image can be expected.

  On the other hand, the vibration damping device 50 includes a chain ring member 40. The chain ring member 40 is configured to have the longest length immediately before the wire spring 13 is fully extended. If the length of the chain ring member 40 becomes the longest, the length of the wire spring 13 does not become any longer. Therefore, there is no possibility that the wire spring 13 will be fully extended, and there is no possibility of damage due to the wire spring 13 being fully extended.

  Then, as shown in FIG. 11, a lateral vibration that moves to the left occurs in the traveling railway vehicle, the ceiling 199 moves to the left, and the lateral distance between the end 3a and the end 23a is d2. Suppose that Then, the fixing part 2 moves leftward together with the ceiling 199, and the inner fixing part 5 also moves leftward. Since the spring structure 10 is fixed to the inner fixing portion 5, the upper part of the spring structure 10 is pulled leftward.

  However, since the bending portion 13 a is fixed to the inner fixing portion 5 so as to stand, the external force that causes the movement of the fixing portion 2 is applied to the two bending portions 13 a via the spring mounting member 12.

  At this time, the wire spring 13 exhibits a restoring force to return to the original shape. In addition, each bending portion 13a is deformed according to the direction and magnitude of the applied external force, but at the same time, it generates a restoring force and moves so as to cancel the change. Since the wire spring 13 has a heat conversion function as described above, the wire spring 13 is deformed in accordance with the direction and magnitude of the applied external force, and absorbs the applied external force by generating heat.

  In addition, since the rubber bands 31 and 32 exhibit restoring force as the fixing portion 2 moves as described above, the base body 1 that has moved leftward is pulled back rightward by the rubber bands 31 and 32. Then, since the leftward external force acting on the base body 1 is offset by the restoring force of the rubber bands 31 and 32, the leftward external force transmitted to the security camera 200 is reduced, and a vibration absorbing effect is obtained.

  Even if the base body 1 moves to the left, the external force that caused the movement is transmitted to the base body 21 via the spring structure 10, the rubber bands 31, 32, and the chain ring member 40. It is never transmitted directly.

  The external force that causes the base body 1 to move to the left is attenuated by the vibration absorbing action of the spring structure 10 and the restoring force of the rubber bands 31 and 32 and then transmitted to the security camera 200. Therefore, the effect of absorbing leftward vibration is obtained, and the leftward external force transmitted to the security camera 200 is suppressed by the vibration damping device 50.

  Moreover, since the spring structure 10 is mainly composed of the wire spring 13, the same heat conversion function is exhibited regardless of the direction in which the relative positions of the spring mounting members 11 and 12 are shifted. Therefore, when the base body 1 moves to the left direction, the effect of suppressing the external force can be obtained regardless of the horizontal direction. Even if the direction of vibration to be generated is not fixed, the vibration suppressing effect for the security camera 200 can be obtained.

  Further, since the rubber bands 31 and 32 are mounted so as to be orthogonal to each other, the rubber bands 31 and 32 can be used regardless of which direction the relative positional relationship between the base body 1 and the base body 21 is shifted along the horizontal direction. Thus, the action of returning the base body 1 to the original position is exhibited in the same manner.

  In addition, since the vibration damping device 50 includes the four spring structures 10, the external force can be dispersed and absorbed effectively. In addition, since the four spring structures 10 are arranged at equal intervals along the circumferential direction with respect to the inner fixing portion 21, the external force is distributed almost evenly with respect to the four spring structures 10. The If an external force concentrates on any of the spring structures 10, there is a possibility that it cannot be absorbed, but the vibration damping device 50 is unlikely to generate such a fear.

  A traveling vehicle often generates three-dimensional vibrations that are a combination of both, rather than only one of horizontal vibration and vertical vibration. In addition, the direction of vibration is often not fixed.

  However, by adopting the above-described configuration, the vibration damping device 50 can simultaneously exhibit a heat conversion function for horizontal vibration by the wire spring 13 and a heat conversion function for vertical vibration. When indefinite three-dimensional vibration occurs in the structure, the four spring structures 10 suppress both horizontal and vertical components. The spring structure 10 absorbs vibration by exhibiting a heat conversion function according to the direction and magnitude of the external force applied to each wire spring 13.

  Therefore, the vibration damping device 50 can suppress any three-dimensional vibration. Therefore, the range of the vibration that can be suppressed in the vibration damping device 50 is greatly expanded as compared with the prior art, and the indefinite three-dimensional vibration can be sufficiently suppressed.

  When the vibration damping device 50 is used, the base body 1 and the base body 21 are arranged such that the fixing portion 22 is arranged below the fixing portion 2 in the vertical direction, and the vibration transmitting member such as the ceiling 199 is used for the security camera 200 or the like. It is used in a state where it is arranged above the shaking object. Therefore, the vibration damping device 50 can suppress indefinite three-dimensional vibration in the case where the vibration transmission member is disposed on the upper side in the vertical direction from the vibration damping object.

(Modification 1)
Next, a modification of the vibration damping device 50 will be described with reference to FIG. FIG. 13 is a perspective view similar to FIG. 7 showing the base body 21 and the spring structure 10 in a vibration damping device according to a modification.

  Although the vibration damping device 50 described above has four spring structures 10, as shown in FIG. 13, the number of spring structures 10 may be three. Also in this case, the intervals along the circumferential direction of the three spring structures 10 are set equally. As the number of the spring structures 10 decreases, the magnitude of the external force applied to each spring structure 10 may increase. Even in such a case, as with the vibration damping device 50 described above, vibrations may occur. Indefinite three-dimensional vibration can be suppressed when the transmission member is arranged in the vertical direction above the object to be damped.

(Modification 2)
In the vibration damping device 50 described above, a chain ring member 47 as shown in FIG. 22A can be used instead of the chain ring member 40. The chain ring member 47 has three metal rings 46. The metal ring 46 is missing a part of the annular portion. Three metal rings 46 are engaged so that the missing portions do not overlap.

  Further, instead of the chain ring member 40, an expansion / contraction unit 140 as shown in FIG. The telescopic unit 140 includes a cylinder 141 and a piston 142. The cylinder 141 is a hollow cylindrical member having a hollow portion 141 a formed therein, and one end thereof is fixed to the inner fixing portion 5. The other end portion is formed with a hole through which the piston 142 can be inserted, and is separated from the inner fixing portion 25. The piston 142 has a reciprocating head 142a at one end and a rotating portion 142b at the other end. The reciprocating head 142a is formed in a shape that fits into the cavity 141a using a deformable member such as rubber or resin. The rotating part 142b is a substantially spherical member, and is formed in a size corresponding to the hole part 25b of the inner fixing part 25. The hole 25b is formed in a substantially spherical shape.

  In the case of the telescopic unit 140, the reciprocating head 142a moves in the hollow portion 141a according to the interval between the inner fixing portion 5 and the inner fixing portion 25, and the length changes. When the reciprocating head 142a moves in the hollow portion 141a to the position closest to the inner fixing portion 25, the reciprocating head 142a comes into contact with the lower end portion of the hollow portion 141a and cannot move any further. The length of is maximized. Therefore, the expansion / contraction unit 140 has a restriction function of restricting the distance between the inner fixing portion 5 and the inner fixing portion 25 to a size smaller than a predetermined size. In addition, when the horizontal displacement occurs between the base body 1 and the base body 21, the reciprocating head 142a is deformed, and further, the rotating part 142b rotates within the hole 25b. It is also possible to deal with horizontal positional deviation.

Second Embodiment Next, a configuration of a vibration damping device 70 according to a second embodiment of the present invention will be described with reference to FIGS. 14 to 16. Here, FIG. 14 is a partially omitted cross-sectional view showing the configuration of the vibration damping device 70. FIG. 15 is a plan view showing the base body 61 and the spiral structure 75. 16A is a side view showing the spiral structure 75, and FIG. 16B is a front view of the same.

  The vibration damping device 70 includes a base body 51, a base body 61, two helical structures 55, and a chain ring member 40. The base body 61 is a first base body in the present invention, and is configured using a metal such as steel, or a resin material such as acrylic resin or fiber reinforced plastic (FRP). The base body 51 has a bottomed cylindrical structure with a low height, and includes a fixing portion 52, a peripheral side portion 53, and an inner fixing portion 55.

  The fixing portion 52 corresponds to the outer surface portion of the thick rectangular plate member. The entire fixing portion 52 is formed flat. The fixing portion 52 is a portion that is fixed to the vibration transmitting member in the same manner as the fixing portion 2.

  The circumferential side portion 53 is formed on the back surface side of the fixing portion 52 so as to be orthogonal to the fixing portion 52 and the inner fixing portion 55 and to surround the inner fixing portion 55. The circumferential side portion 53 is formed so as to face a circumferential side portion 63 (described later) of the base body 61.

  The inner fixing portion 55 is the back surface portion of the fixing portion 2, that is, the surface portion inside the peripheral side portion 53 of the thick rectangular plate-shaped member described above. It is the part arrange | positioned so that it may be located below.

  The inner fixing portion 55 is formed flat. Two spiral structures 75 and a chain ring member 40 are fixed to the inner fixing portion 55. An insertion hole is formed.

  Next, the base body 61 is configured using a metal such as steel, or a resin material such as an acrylic resin or FRP, as with the base body 1. The base body 61 has a bottomed cylindrical structure similar to the base body 51, and includes a fixing portion 62, a peripheral side portion 63, and an inner fixing portion 65.

  The fixing portion 62 corresponds to the outer surface portion of the rectangular plate member. The fixed part 62 is formed flat as a whole. The fixing portion 62 is a portion to which the vibration suppression object is fixed.

  The peripheral side portion 63 is formed on the back surface side of the fixing portion 62 so as to be orthogonal to the fixing portion 62 and the inner fixing portion 65 and to surround the inner fixing portion 65. The circumferential side portion 63 is formed to face the circumferential side portion 53 described above.

  The inner fixing portion 65 is a back surface portion of the fixing portion 62, a surface portion of the thick rectangular plate-like member that is on the inner side of the peripheral side portion 63, and is positioned on the upper side in the vertical direction of the fixing portion 62 in the base body 61. It is a part arranged to do.

  The inner fixing portion 65 is formed flat. Two spiral structures 75 and a chain ring member 40 are fixed to the inner fixing portion 65. Further, an insertion hole similar to the inner fixing portion 25 is formed in the inner fixing portion 65.

  As shown in detail in FIGS. 16A and 16B, the spiral structure 75 has a wire spring 76 and rod-shaped members 77a and 77b. The wire spring 76 is an annular cord member and includes a plurality of annular portions 76a, and the whole is formed in a spiral shape. The annular portion 76a is obtained by forming the above-described cable member 16 in a generally annular shape. Similar to the curved portion 13a, the annular portion 76a exerts a restoring force when the shape changes, for example, changes from a circular shape to an elliptical shape, and tries to return to the original shape.

  The rod-shaped members 77a and 77b are members whose outer sides of the square cross section are flat. The rod-shaped members 77a and 77b have a plurality of through holes formed at equal intervals along the length direction. The rod-shaped members 77a and 77b are integrated with the wire spring 76 by inserting the annular portion 76a of the wire spring 76 into the respective through holes. Only a part (this part is also referred to as an opposing part) facing the annular part 76a across the center 76p is inserted into the rod-shaped members 77a and 77b. Further, the rod-shaped members 77a and 77b are arranged at positions facing each other across the center 76p of each annular portion 76a, and are parallel to the central axis CL of the wire spring 76 (see FIG. 16B).

  The spiral structure 75 is sandwiched between the inner fixing portion 55 and the inner fixing portion 65. In addition, each rod-shaped member 77 a is fixed to the inner fixing portion 55, and the rod-shaped member 77 b is fixed to the inner fixing portion 65. The rod-shaped members 77a and 77b are fixed to the inner fixing portion 55 and the inner fixing portion 65 using bolts (not shown).

  By doing so, the wire springs 76 are respectively fixed to both the inner fixing portion 55 and the inner fixing portion 65 by raising the annular portion 76a.

  In the case of the vibration control device 70, the fixed portion 52 is fixed to a vibration transmission member such as a ceiling, and the vibration suppression object such as a security camera is fixed to the fixed portion 62 in the same manner as the vibration control device 50. When the damping object is fixed to the fixing portion 62, the wire spring 76 of the spiral structure 75 is extended downward by the gravity applied to the damping object and the gravity applied to the base body 61. When the vibration transmitting member moves upward in this state, the wire spring 76 exhibits the same heat conversion function as that of the wire spring 13, and the external force that causes the vibration is absorbed. Even when the vibration transmitting member moves in the horizontal direction, the wire spring 76 exhibits the same heat conversion function as that of the wire spring 13, and the external force that causes the vibration is absorbed. Similarly to the vibration damping device 50, the vibration damping device 70 does not directly transmit an external force to a vibration damping object such as a security camera, but is transmitted via the spiral structure 75. Since the external force that causes the vibration is absorbed in the spiral structure 75, the vibration damping device 70 is also indeterminate when the vibration transmitting member is arranged above the vibration damping object in the vertical direction. Three-dimensional vibration can be sufficiently suppressed.

Third Embodiment Next, a configuration of a vibration damping device 100 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 18 is a cross-sectional view showing the configuration of the vibration damping device 100.

  The vibration damping device 100 includes a base body 110, a base body 120, and two spring structures 10.

  The base body 110 has a fixing part 111, an inner fixing part 113, and a peripheral side part 112. The base body 110 has a structure in which an opening portion of a bottomed cylindrical member is closed by an inner fixing portion 113.

  The fixing part 111 corresponds to the first fixing part in the present invention, and is a thick disk-shaped member. The inner fixing portion 113 corresponds to the first inner fixing portion in the present invention, and is a thick disk-shaped member, but has an opening 113a at the center. Further, the inner fixing portion 113 is disposed so as to be parallel to and opposed to the fixing portion 111 with an interval corresponding to the height of the peripheral side portion 112. The peripheral side portion 112 corresponds to a side surface portion of the cylindrical member. The peripheral side portion 112 surrounds the inner fixing portion 113 and is formed so as to connect the fixing portion 111 and the inner fixing portion 113.

  The base body 120 has a fixing part 122, an inner fixing part 121, and a connecting part 123. The base body 120 has a structure in which two thick disk-shaped members are connected by a plate-shaped or bar-shaped member.

  The fixed part 122 is a thick disk-shaped member having a smaller size than the fixed part 111. The inner fixing part 121 is also a thick disk-shaped member having a smaller size than the fixing part 111. The fixing portion 122 is disposed outside the base body 110 and below the inner fixing portion 113.

  The inner fixing portion 121 is housed between the fixing portion 111 and the inner fixing portion 113 and is disposed so as to be positioned above the inner fixing portion 113 in the vertical direction. Further, the inner fixing portion 121 is disposed so as to be parallel to and opposed to the fixing portion 122 with an interval corresponding to the height of the connecting portion 123. The connecting portion 123 is a plate-like or bar-like member, is inserted through the opening 113a of the inner fixing portion 113, is connected to the fixing portion 122 and the inner fixing portion 121, and connects both.

  The two spring structures 10 are stored in a storage space 130 surrounded by the inner fixing portion 113, the inner fixing portion 121 and the peripheral side portion 112, and are fixed to the inner fixing portion 113 and the inner fixing portion 121.

  The vibration damping device 100 is used by fixing the fixing portion 111 to a vibration transmitting member such as the ceiling 199 and fixing a vibration suppression object such as the security camera 200 to the fixing portion 122. Then, the gravity applied to the security camera 200 and the gravity applied to the base body 120 act on the two spring structures 10, whereby the two spring structures 10 bend. When upward vibration is generated in this state and the ceiling 199 moves upward, the base body 110 moves upward, the interval between the inner fixing portion 113 and the inner fixing portion 121 is reduced, and the spring structure 10 is crushed. It deforms as follows. Then, the two spring structures 10 exhibit the heat conversion function, and the external force that causes the vibration is absorbed.

  In addition, when horizontal vibration occurs, the ceiling 199 moves in the horizontal direction, a horizontal displacement occurs in the inner fixing portion 113 and the inner fixing portion 121, and the spring structure 10 is deformed. Also in this case, the two spring structures 10 exhibit the heat conversion function, and the external force that causes the vibration is absorbed.

  In the case of the vibration damping device 100 as well, like the vibration damping device 50, the external force is not directly transmitted to the vibration damping object such as a security camera, but is transmitted via the spring structure 10. Since the spring structure 10 absorbs the external force that caused the vibration, the vibration damping device 100 is also indeterminate with respect to the case where the vibration transmitting member is arranged above the vibration damping object in the vertical direction. Three-dimensional vibration can be sufficiently suppressed.

  In the vibration damping device 50 described above, the spring structure 10 is stretched by the gravity applied to the security camera 200 and the gravity applied to the base body 21. Therefore, there is a possibility that the wire spring 13 of the spring structure 10 may be fully extended, and this is solved by the chain ring member 40. However, in the case of the vibration control device 100, the two spring structures 10 are deformed so as to be crushed by the gravity applied to the security camera 200 and the gravity applied to the base body 120, so that the wire spring 13 may be fully extended. There is no. Further, since the two spring structures 10 are bent, the vibration absorbing action is more easily exhibited.

  Further, in the vibration damping device 100, a wire spring 80 shown in FIG. 19 may be used instead of the two spring structures 10. The wire spring 80 has a length that surrounds the entire opening 113 a, and has many annular portions 76 a similar to the wire spring 76. In the wire spring 76 described above, the plurality of annular portions 76 are arranged in a straight line, but in the wire spring 80, the plurality of annular portions 76 are arranged in a circumferential shape and connected together. Such a wire spring 80 may be stored in the storage space 130 and fixed to the inner fixing portion 113 and the inner fixing portion 121. If it does so, the wire spring 80 will exhibit a vibration absorption effect | action and the absorption effect of the vibration by the damping device 100 will be acquired.

Fourth Embodiment Next, a vibration damping device 150 according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 20 is a partially omitted front view showing the main part inside the railway vehicle 300. The railway vehicle 300 includes a floor 301, a side wall 302, a wife portion 303, a ceiling 304, and a connecting portion 305.

  When a security camera is attached to the railway vehicle 300, it may be fixed to the ceiling 304 like a security camera 200 like the security camera 200. In this case, since gravity in the vertical direction acts on the security camera 200, the above-described vibration control devices 50, 70, 100 are fixed to the ceiling 304, and the security camera 200 is fixed to the vibration control devices 50, 70, 100. Good.

  However, it is also conceivable that the camera is fixed to a connecting portion 305 disposed between the ceiling 304 and the side wall 302 as in the security camera 210. The connecting portion 305 is not parallel to the floor 301 but is inclined with respect to the ceiling 304. Therefore, when the damping device 50 is fixed to the connecting portion 305, the arrangement direction of the metal rings 41 in the chain ring member 40 does not become the vertical direction. Therefore, when the security camera 210 that is tilted with respect to the ceiling 304, for example, fixed to a portion such as the connecting portion 305, is a vibration control object, it is not preferable to use the vibration control devices 50, 70, and 100. .

  When a structure fixed to a portion that is neither horizontal nor vertical, such as the security camera 210, is a vibration control object, it is preferable to use the vibration control device 150 shown in FIG. The vibration damping device 150 is different from the vibration damping device 100 in that it includes a chain ring member 45 instead of the chain ring member 40. The chain ring member 45 has three metal rings 41 like the chain ring member 40, but the arrangement direction of the three metal rings 41 coincides with the vertical direction g when the vibration damping device 150 is fixed to the connecting portion 305. Is configured to do. Therefore, the chain ring member 45 can prevent the wire spring 13 from being fully extended.

  When the security camera 210 is fixed to the vibration control device 150, the gravity of the base body 21 and the security camera 210 coincides with the vertical direction g. The vertical direction g can be decomposed into a component g1 in the direction from the base body 1 toward the base body 21 and a component g2 in the direction along the base body 1 and the base body 21. Moreover, the component of the external force by the connection part 305 can also be decomposed | disassembled into the component g1 and the component g2. Therefore, vibration for the security camera 210 can be absorbed by the vibration control device 150.

  On the other hand, with respect to the security camera 220 fixed to the wife part 303, the arrangement direction of the three metal rings 41 in the chain ring member 45 is set to an acute angle with respect to FIG. And the security camera 220 may be fixed to the vibration control device 150. Since the wife 303 is installed in the vertical direction, if the vibration damping device 150 is fixed directly to the wife 303, the arrangement direction of the three metal rings 41 cannot be matched with the vertical direction. Therefore, there is a possibility that the function of regulating the distance by the chain ring member 40 may not be exhibited, which is not preferable. Therefore, a receiving bracket is used. The receiving metal fitting is formed such that the upper side is thicker than the lower side. Therefore, when the damping device 150 is fixed to the wife 303 via the receiving metal fitting, the upper side of the damping device 150 protrudes toward the front, so that the arrangement direction of the three metal rings 41 matches the vertical direction. be able to.

  The above description is the description of the embodiment of the present invention, and does not limit the apparatus and method of the present invention, and various modifications can be easily implemented. In addition, an apparatus or a method configured by appropriately combining components, functions, features, or method steps in each embodiment is also included in the present invention.

  In the above embodiment, the security camera is mainly taken up as the vibration suppression object, and the railway vehicle is taken up as the vibration transmission member. However, the present invention also applies to the case where the vibration transmission object and the vibration transmission member are other than the above. Can be applied. For example, the present invention can also be applied to a case where the vibration suppression object is a duct in a building and the vibration transmission member is a ceiling of the building.

  In the vibration damping device 50, since the circumferential side portion 3 and the circumferential side portion 23 are formed so as to face each other, foreign matter such as dust can be prevented from entering the storage space 19. And the peripheral side portion 23 may not be formed so as to face each other. Moreover, although the vibration damping device 50 has the two rubber bands 31 and 32, only one of them may be used. The chain ring member 40 includes three metal rings 41, but the number of metal rings 41 may be two, or four or more.

  By applying the present invention, in the vibration damping device that suppresses the vibration of the structure, the range of vibration that can be suppressed is expanded, and the vibration suppression target is not disposed below the vibration suppression object. When an object is installed, it is possible to suppress indefinite three-dimensional vibration. The present invention can be applied to a vibration damping device that suppresses vibration of a structure.

  1, 21, 51, 61, 110, 120 ... base body, 2, 22, 52, 62, 111, 122 ... fixed part, 3, 23, 53, 63, 112 ... peripheral side part, 5, 25, 55, 65, 113, 121 ... inner fixing part, 10 ... spring structure, 13, 76, 80 ... wire spring, 13 a ... bending part, 16 ... cord member, 19, 130 ... storage space, 31, 32 ... rubber band, 40 , 47 ... Chain ring member, 41, 46 ... Metal ring, 64 ... Linear member, 65 ... Unit rope member, 75 ... Spiral structure, 50, 70, 100, 150 ... Damping device, 140 ... Telescopic unit.

Claims (9)

A curved cord member having a curved portion obtained by curving a cord member obtained by combining a plurality of linear members;
A first base body including a first fixing portion fixed to a vibration transmission member serving as a vibration transmission source;
A second base body having a second fixing portion to which the vibration control object is fixed;
The first base body and the second base body are arranged such that the second fixing portion is positioned below the vertical direction with respect to the first fixing portion,
The first base body has a first inner fixing portion arranged so as to be positioned on a lower side in the vertical direction than the first fixing portion,
The second base body has a second inner fixing portion disposed so as to be positioned above the second fixing portion in the vertical direction,
The curved cable member is housed in a storage space sandwiched between the first inner fixed part and the second inner fixed part, and the curved cable member is positioned so that the curved part rises. A vibration damping device fixed to the fixed portion and the second inner fixed portion.   A size smaller than a size that is engaged with the first inner fixing portion and the second inner fixing portion, and in which an interval between the first inner fixing portion and the second inner fixing portion is determined. The vibration damping device according to claim 1, further comprising an interval restricting member that restricts the distance to the sound.   Both the one end portion and the other end portion are fixed to the second fixing portion, and the intermediate portion located in the middle between the one end portion and the other end portion crosses the first fixing portion. The vibration damping device according to claim 1, further comprising an elastic band made of an elastic member attached to the base body and the second base body.   4. The vibration damping device according to claim 3, comprising two elastic bands, each of which is attached to the first base body and the second base body such that the elastic bands are orthogonal to each other. 5.   The vibration damping device according to claim 3 or 4, wherein a groove portion corresponding to a shape of the elastic band is formed on a surface of the first fixing portion, and the elastic band is accommodated in the groove portion.   The first base body and the second base body surround the first inner fixing portion and the second inner fixing portion, and are formed with a first peripheral side portion and a first peripheral portion formed so as to face each other. The vibration damping device according to any one of claims 1 to 5, each having two circumferential side portions.   The vibration control device according to any one of claims 2 to 6, wherein the interval regulating member is configured to be extendable and contractable along a vertical direction when the first fixing portion is fixed to the vibration member.   The vibration control device according to any one of claims 2 to 7, wherein the interval regulating member has a chain structure in which a plurality of metal ring members are connected in a chain. The first inner fixing portion has an opening in the center and is disposed so as to face the first fixing portion,
The first base body includes a first peripheral side portion that is formed so as to surround the first inner fixing portion and to connect the first fixing portion and the first inner fixing portion. ,
The second inner fixing portion is disposed so as to be positioned above the first inner fixing portion in the vertical direction,
The said 2nd base body has a connection part which is penetrated by the said opening part of a said 1st inner fixing | fixed part, and connects the said 2nd inner fixing | fixed part and a said 2nd fixing | fixed part. Damping device.