JP6033591B2 - Seismic reduction device - Google Patents

Description

  The present invention relates to a suspended object to be suspended as a ceiling suspended mold, for example, an air-conditioning indoor unit, piping, or a light-ceiling preventive measure such as a floor-mounted object and a floor-mounted object and a ceiling part. The present invention relates to a seismic reduction device that is connected and suspended from a ceiling to be used as a measure for preventing its falling, and is effective even in the event of a major earthquake.

  Conventionally, as a seismic reduction structure, for example, a support between a support (anchor) driven into a ceiling portion of a building structure and a supported body (an object to be supported) suspended from the support are supported by a coil spring so as to freely expand and contract. When the supported body is such that vibration is generated, a telescopic device is used to block the vibration generated from the supported body so as not to be transmitted to the ceiling (see, for example, Patent Document 1). . In the case where the supported body does not generate vibration itself, such as a light ceiling, the vibration transmitted from the ceiling portion is blocked so that it is not transmitted to the light ceiling.

  As a specific example of this telescopic device, as shown in FIG. 10 (representative diagram of Patent Document 1), an attachment portion 51 is provided between the support 50 and the supported body 60 and attached to the support 50. Is attached with a substantially U-shaped hanger 1 having a hook portion 1a at the tip. The hanger 1 has a hook portion 1 a at the tip thereof hooked on an end portion of the coil spring 4 on the supported body 60 side through the inside of the coil spring 4 from the end portion of the coil spring 4 on the support body 50 side.

  Further, the supported hanger 2 on the supported body 60 side having the same shape as the hanger 1 and having the hook portion 2a at the tip is attached to the mounting portion 61 attached to the supported body 60. In the hanger 2, the hook portion 2 a at the tip is hooked on the end portion on the support body 50 side of the coil spring 4 from the end portion of the coil spring 4 on the support body 60 side through the inside of the coil spring 4.

  Then, when the support 60 itself is subjected to vibration or an external force such as vibration or earthquake is applied to the support 60 and the support 60 is displaced in the direction away from the support 50, The hook portion 2a pulls the end of the coil spring 4 on the support 50 side toward the supported body 60. As a result, the coil spring 4 is compressed and compressed between the hook portion 2a at the tip of the hanger 2 and the hook portion 1a at the tip of the hanger 1 (between the support 50 and the support 60). Repeat expansion and contraction according to external force. The expansion and contraction of the coil spring 4 blocks or relaxes the transmission of vibration from the support 50 to the supported body 60 or from the supported body 60 to the support 50. As a result, the relative positional relationship between the support 50 and the supported body 60 is changed by the expansion and contraction operation of the coil spring 4 in response to vibration input during normal operation of the supported body 60 or when an ordinary earthquake occurs. Therefore, the support body 50 and the suspended part are not destroyed, and the supported body 60 can be supported stably.

  When the supported body 60 is in normal operation or when the earthquake is of a normal magnitude, the supported body 60 does not sway so much that the support body 50 does not interfere with the normal vibration. However, when a large earthquake occurs, the supported body 60 is greatly and shockably and repeatedly shaken by strong impact energy, so that the normal operation and the earthquake of the supported body 60 as described above are normal. A device equipped with one coil spring 4 to cope with this problem cannot sufficiently cope with it. In particular, when the supported body 60 is a heavy object, the load on the support body 50 increases more and cannot be dealt with.

JP 2002-54684 A

  Therefore, the main problem of the present invention is that a large earthquake is supported in a state in which a heavy support object or a floor object is supported, as well as a normal operation of a supported body or an earthquake having a normal size. An object of the present invention is to provide a highly safe earthquake-reducing device capable of accurately interrupting or attenuating the external force caused by a large earthquake even if an earthquake occurs.

The invention described in claim 1 is “the telescopic vibration reducing device 10 that allows expansion and contraction between the support 100 and the supported body 200,
A seat plate 120 having an insertion space 121 penetrating in the telescopic direction and provided near the support body 100;
A seated plate 220 that is opposed to the seating plate 120 and has an inserted space 221 that penetrates in the expansion and contraction direction at the facing position of the insertion space 121, and is provided near the supported body 200;
A coil spring 300 disposed between the opposing surfaces of the seat plate 120 and the seat plate 220 so as to contact the periphery of the insertion space 121 and the insertion space 221;
A fine vibration absorber 400 disposed between upper and lower opposing surfaces of the seat plate 120 and the seat plate 220 and having substantially the same length as the coil spring 300 so as to contact the coil spring 300 from the inside. Or the micro-vibration absorber 400 disposed so as to fit around the coil spring 300;
The coil spring 300 expands and contracts in the expansion / contraction direction, and is arranged so as to surround the outer periphery of the coil spring 300 or along the inner periphery, and is set shorter than the coil spring 300 so that the seat plate 120 and the seat plate 220 A shock-absorbing damper 500 for overload reduction that is interposed when an overload exceeding the gap A is inputted from the outside, and compression starts only when an overload is input from the outside.
A locking portion 131 attached to the support body 100; at least two arm portions 132 extending from both sides of the locking portion 131 in the same direction and inserted into the insertion space 121 of the seat plate 120; A hanger 130 formed of a hook portion 133 formed at the tip end portion of the portion 132 and inserted through the insertion space 221 of the seat plate 220 to be engaged with the support-side end portion 224 of the seat plate 220. When,
The to-be-latched portion 231 attached to the supported body 200 and at least two to-be-inserted spaces 221 extending in the same direction from both sides of the to-be-latched portion 231 and inserted into the insertion space 221 of the seat plate 220 An arm portion 232 and a hooked portion 233 that is formed at the distal end portion of the arm portion 232 and passes through the insertion space 121 of the seat plate 120 and is locked to the support side end portion 124 of the seat plate 120. The seismic reduction device 10 is characterized by comprising a hanger 230 that is configured.

The gap A is an interval between the upper end position of the coil spring 300 compressed in the expansion / contraction direction due to the load of the supported body 200 and the upper end position of the vibration damping damper 500 where compression starts due to overload. In the case where 200 is a stationary body, it does not fluctuate due to the static load of the supported body 200, but the supported body 200 is an operating body and vibrations due to the operation of the supported body 200, normal earthquakes transmitted from the supporting body 100, and other It fluctuates when subjected to external vibration. The gap A is provided in response to the normal load of the supported body 200, while the coil spring 300 first supports the load of the supported body 200 by compressing, whereas the gap A is larger than the gap A thereafter. When an overload such as an earthquake occurs, the anti-seismic damper 500 starts to cope with compression so as to reduce the overload (block or reduce vibration). Note that the micro vibration absorber 400 in contact with the coil spring 300 can prevent surging due to high-frequency disturbance generated in the coil spring 300.

The invention described in claim 2 is the vibration reduction device 10 according to claim 1,
“The anti-seismic damper 500 is an anti-seismic coil spring 510 having a spring constant equal to or greater than the spring constant of the coil spring 300”.

  When setting the spring constant of the coil spring 300 and the spring constant of the anti-seismic coil spring 510, only the coil spring 300 corresponds to the load when the supported body 200 is suspended, and this is supported by expansion and contraction biasing. In response to an overload due to a large earthquake, the anti-seismic coil spring 510 cooperates with the coil spring 300 and supports it by extending and contracting. Therefore, for an overload such as a large earthquake, the spring reaction force of both the springs 300 and 510 of the coil spring 300 and the anti-seismic coil spring 510 works to cope with the overload. For this reason, the spring constant of the vibration reducing coil spring 510 is set to be equal to or more than at least the spring constant of the coil spring 300.

According to a third aspect of the present invention, in the vibration damping device 10 according to the first aspect,
“The anti-seismic damper 500 is a spring-enclosed cylinder 540, and the spring-enclosed cylinder 540 is formed by using an elastic elastomer 530 to form an anti-vibration coil spring 510 having a spring constant equal to or larger than the spring constant of the coil spring 300. It is molded into a shape ”.

  The spring-sealed cylindrical body 540 has an anti-seismic coil spring 510 having a large spring constant inside, and is integrally formed by covering the periphery with an elastic elastomer 530 such as a rubber material or a low-rebound rubber.

According to a fourth aspect of the present invention, in the vibration damping device 10 according to the first aspect,
“The vibration damping damper 500 is composed of a cylinder 570 and a piston 580,
The cylinder 570 has an internal space 560 in which a viscous body 550 is loaded,
The piston 580 extends from the seat plate 120 and is inserted through the viscous body 550 of the internal space 560 of the cylinder 570 so as to freely advance and retreat. "

  The viscous body 550 only needs to give resistance to the movement of the piston 580, and a liquid medium containing a highly viscous liquid, silicon material, or the like is used.

  According to the first aspect of the present invention, the coil spring 300 is interposed between the opposed surfaces of the seat plate 120 and the seat plate 220 so that the coil spring 300 is subjected to a static load on the supported body 200 (the The coil spring 300 can support the weight). In other words, the supported body 200 may be stationary, or may itself operate to generate vibration, and external vibration may be transmitted to the support 100 side, as described above. The coil spring 300 is compressed and balanced in accordance with the static load of the supported body 200, expands and contracts in response to the vibration input at the balanced position, and blocks transmission of vibration to the support body 100. Alternatively, when external vibration is transmitted to the support body 100, the coil spring 300 expands and contracts in response to the external vibration, and the transmission of vibration to the supported body 200 is blocked. At this time, the coil spring 300 is not compressed beyond the gap A.

  On the other hand, when a large external force such as an impact force, for example, an overload such as a large earthquake, is applied, the coil spring 300 is compressed beyond the gap A, and the vibration reducing damper 500 is compressed together with the coil spring 300. Is done. As a result, the vibration reduction damper 500 gives a compression resistance to an overload such as a large earthquake and reduces the transmission of the strong overload to the supported body 200. It will be greatly reduced. In other words, the seismic damper 500 can provide an overload avoidance function that eliminates or reduces the occurrence of destructive force based on a strong overload, and thus can be used as a highly safe seismic reduction device. Therefore, it can be effectively used for applications such as measures for preventing the falling of suspended objects such as air-conditioning indoor units, piping and light ceilings, and measures for preventing falling of objects placed on the floor suspended from the ceiling.

  According to the second aspect of the present invention, the coil spring 300 and the anti-seismic coil spring 510 are arranged in a double ring shape on a substantially concentric circle, and both springs 300 and 510 correspond to each other. That is, when a normal load is applied, the load is supported by the elastic action of the coil spring 300 in which the spring constant is set to be small (soft), for example. On the other hand, when a strong overload (for example, a large earthquake) such as an impact force exceeding the gap A is applied, in addition to the coil spring 300, the spring constant is set to a large (hard) spring constant, for example. The elastic action of (2) acts to block or mitigate the overload transmitted to the supported body 200. At this time, since both spring reaction forces work, the spring constant becomes more than twice that of the coil spring 300, and a remarkable vibration reduction effect can be obtained. In particular, since the anti-seismic coil spring 510 is made of a hard spring having a large spring constant, the spring reaction force during compression increases in proportion to the magnitude of the overload. For this reason, the spring reaction force increases as a large earthquake occurs, and a highly safe earthquake-damping damper 500 that reduces the strong impact force exerted on the support body 100 and moderates and reduces the shaking of the supported body 200 can be obtained. it can.

  According to the third aspect of the present invention, the spring-encapsulated cylindrical body 540 is formed as the vibration-reducing damper 500 by molding the vibration-reducing coil spring 510 into a cylindrical shape with the elastic elastomer 530 so that the whole has elasticity. Can be used. As described above, when a strong overload is applied, the anti-seismic coil spring 510 enclosed in the spring-filled cylinder 540 is compressed, so that a spring reaction force can be applied to the overload and the overload can be attenuated. An accurate seismic reduction effect on the support body 100 can be obtained by the action of the spring reaction force when the seismic reduction coil spring 510 is compressed. Further, the spring-enclosed cylinder 540 expands and contracts as the elastic elastomer 530 expands and contracts with the expansion and contraction of the vibration-reducing coil spring 510 and exerts an effect of reducing vibration by converting vibration energy into heat. Since the elastic elastomer 530 is provided in contact with the vibration reducing coil spring 510, the same effect as that of the fine vibration absorber 400 that contacts the vibration reducing coil spring 510 and absorbs minute vibration can be obtained. For this reason, if the spring encapsulated cylinder 540 is used, the fine vibration absorber 400 can be omitted, and the number of parts can be reduced and the handling can be facilitated.

  According to the invention described in claim 4, since the expansion and contraction-type vibration-reducing damper 500 is constituted by the cylinder 570 enclosing the viscous body 550 and the piston 580 that is freely inserted and retracted therein, the gap A is formed. When a strong overload is input beyond the piston 580, the piston 580 moves in the viscous body 550 based on the compression between the seat plate 120 and the seat plate 220 that have received the overload. Since it moves while receiving viscous resistance at that time, it is possible to reduce tremors by converting a strong overload into heat during the movement. In this way, if a vibration reducing structure that reduces a strong overload is configured using the cylinder 570 and the piston 580, a vibration reducing device can be constructed instead of the vibration reducing coil spring 510.

FIG. 1 (A) is a longitudinal sectional view of a main part showing a vibration damping device of Embodiment 1 of the present invention, and FIG. 1 (B) is a partially enlarged sectional view of a seat plate in Embodiment 1 of the present invention. ) Is a plan view of the first embodiment of the present invention. It is an exploded view of the earthquake-reduction apparatus of the Example 1. FIG. It is a principal part perspective view which shows the seat board and seat board of the seismic-reduction apparatus of the Example 1. FIG. It is a principal part longitudinal cross-sectional view which shows the operation state at the time of the overload input in the seismic-reduction apparatus of the Example 1. FIG. It is a principal part longitudinal cross-sectional view which shows the use condition which used two or more the vibration isolator of the Example 1. FIG. It is a principal part longitudinal cross-sectional view which shows the seismic-reduction apparatus of Example 2 of this invention. It is a principal part longitudinal cross-sectional view which shows the operation state at the time of the overload input of the seismic reduction apparatus in the Example 2. FIG. FIG. 8 (A) is a longitudinal sectional view showing a vibration damping device of Embodiment 3 of the present invention, FIG. 8 (B) is an enlarged longitudinal sectional view of an essential part of Embodiment 3 of the present invention, and FIG. It is a principal part expanded horizontal sectional view of Example 3. It is a principal part longitudinal cross-sectional view which shows the operation state at the time of the overload input of the seismic-reduction apparatus in the Example 3. It is a front view which shows the expansion-contraction apparatus using the conventional coil spring.

  The present invention will be described below with reference to the drawings.

[Example 1]
FIG. 1 is a view showing a use state of a vibration isolator 10 according to the present invention, FIG. 2 is an exploded view of components of the vibration reducer 10, and FIG. FIG. 4 is a perspective view showing a pair of upper and lower seat plates 120 and a seat plate 220 provided, and FIG. 4 is a view showing a compressed state when the seismic reduction device 10 receives external force. Here, an example in which the vibration isolator 10 is used as a ceiling support type is shown.

The seismic reduction device 10 is provided with a fixture 110, a seat plate 120, and a hanger 130 on the upper support body 100 side provided in the ceiling portion 11 of the building structure, and is attached to the lower support body 200 side. A tool 210, a seat plate 220, and a hanger 230 are provided, and the hanger 130 and the hanger 230 are arranged in a symmetrical shape that is upside down. And between the upper and lower opposing surfaces of the seat plate 120 and the seat plate 220 as the intermediate portion, a coil spring 300, a micro vibration absorber 400, and a vibration reducing coil spring 510 provided as an example of the vibration reducing damper 500, An elastic cylinder 520 provided as necessary is incorporated.

  The support 100 described above is inserted into the ceiling portion 11 of the building structure as a ceiling suspension type anchor, and the lower portion of the support 100 is exposed downward as the suspension support portion 101 from the ceiling portion 11. A ring-shaped attachment 110 provided for connecting the suspension support is pivotally attached to the suspension support 101 by a pivot pin 111 of the suspension support 101 so as to freely swing. Of course, you may make it attach directly to the support body 100 by some means, without using these.

  As shown also in the upper side of FIG. 3, the seat plate 120 is a disc having an insertion space 121 provided through the center of the disc in a cross shape in plan view. The insertion space 121 is formed by opening a hanger insertion groove 122 having a wide width and a long groove length and a hanger insertion groove 123 having a narrow width and a short groove length so as to intersect each other in a cross shape at the center of the disk. . A hanger 130 having a large wire diameter, which will be described later, is inserted into one hanger insertion groove 122, and a hanger 230 having a small wire diameter, which will be described later, is inserted into the other hanger insertion groove 123. Of course, the hanger insertion grooves 122 and 123 may have the same width and the same length.

  Further, the upper surface of the seat plate 120 is a support-side end portion 124 for locking a hooked portion 233 of a hanger 230 to be described later. On the other hand, the lower surface of the seat plate 120 is formed with an annular groove 125 to which an upper end peripheral portion 521 of an elastic cylinder 520 described later is fitted. When the vibration-reducing coil spring 510 is provided outside the coil spring 300, the lower surface of the inner diameter side seat plate 120 with the annular groove 125 as a boundary serves as an upper spring seat 126 that receives the upper end surface of the coil spring 300, which will be described later. The lower surface of the seat plate 120 on the outer diameter side with the groove 125 as a boundary is an upper spring seat 127 that receives the upper end surface of a vibration reducing coil spring 510 described later. Therefore, when the vibration reducing coil spring 510 is provided inside the coil spring 300, the reverse is true.

  The above-described hanger 130 is formed by bending a metal wire having a circular cross section into a substantially U shape, and a curved portion near the center thereof is a locking portion 131 for locking and mounting to the mounting portion 110 of the support 100. Yes. Furthermore, the both sides of the locking part 131 have two arm parts 132 extending long in parallel in the same direction, and a hook part 133 that opens outward is formed at the tip part. Further, the two arms 132 of the hanger 130 are inserted and guided in the vertical direction at both ends in the groove of the hanger insertion groove 122 of the seat plate 120 described above. The outer diameter of the metal wire rod of the hanger 130 has an outer diameter dimension corresponding to the wide width of the hanger insertion groove 122.

  Furthermore, the hanger 130 is not only guided through the hanger insertion groove 122 of the seat plate 120 disposed on the upper side, but also in the hanger insertion groove 222 of the seat plate 220 described below disposed on the lower side. Guided through the direction.

  The supported body 200 is a suspended support object such as an indoor air conditioner, a duct, a pipe, or a light ceiling, and is supported by the upper support body 100 via the vibration damping device 10. Further, the ceiling part 11 (including a ceiling part in a cubicle (not shown)) is connected with a floor object such as a building power supply device or a transformer, and the floor object is suspended and supported from the ceiling part 11. It can also be used as a measure for preventing the fall. Therefore, such a floor placement object is also included in the supported body 200. A ring-shaped attachment 210 provided for connecting a suspension support is pivotally supported by a pivot pin 211 of the suspension support 201 and attached to the suspension support 201 at the upper part of the supported body 200 so as to freely swing. ing. Of course, it is possible to attach them directly to the supported body 200 by some means without using them.

  The seat plate 220 has the same shape as the seat plate 120 described above and is incorporated in a vertically symmetrical manner. As shown in the lower side of FIG. This is a disk having an insertion space 221 provided therethrough. The insertion space 221 is opened by crossing a hanger insertion groove 222 having a wide width and a long groove length and a hanger insertion groove 223 having a narrow width and a short groove length in a cross shape at the center of the disk. . Of course, the hanger insertion grooves 222 and 223 may have the same width and the same length as the hanger insertion grooves 122 and 123 described above.

  The hanger 130 having a large wire diameter is inserted into the hanger insertion groove 222, and the hanger 230 having a small wire diameter, which will be described later, is inserted into the hanger insertion groove 223. The hanger 130 and the hanger 230 are inserted in a cross shape in the insertion space 121 of the seat plate 120 and the insertion space 221 of the seat plate 220, respectively. The large and small U-shaped intervals at which the arms 132 and 232 do not interfere with each other are set.

  Further, the lower surface of the seat plate 220 serves as a supported-body-side end portion 224 that locks a hook portion 133 (described later) of the hanger 130. On the other hand, the upper surface of the seat plate 220 is formed with an annular groove 225 to which a lower end peripheral portion 522 of an elastic cylinder 520 described later is fitted. The upper surface of the seat plate 220 on the inner diameter side with the annular groove 225 as a boundary serves as a lower spring seat 226 that receives a lower end surface of a coil spring 300 described later, and the seat plate 220 on the outer diameter side with the annular groove 225 as a boundary. The upper surface is a lower spring seat 227 that receives a lower end surface of a vibration reducing coil spring 510 described later. Also in this case, as in the case of the seat plate 120 described above, when the anti-seismic coil spring 510 is provided inside the coil spring 300, the opposite is true.

  The above-described hanger 230 differs from the above-described hanger 130 in that a metal wire having a narrow width and a small diameter that fits in the U-shape of the hanger 130 is used, and the other has the same structure. . And it arrange | positions symmetrically with the hanger 130 mentioned above, and is integrated. That is, the hanger 230 is also bent into a substantially U shape, and the bent portion near the center becomes a locked portion 231 for locking and mounting to the mounting tool 210 of the supported body 200. Yes. Furthermore, the both sides of the to-be-latched part 231 have the two arm parts 232 extended long in parallel with the same direction, The hook part 233 opened outside is formed in the front-end | tip part. Further, the two arm portions 232 of the hanger 230 are inserted and guided in the vertical direction at both ends in the groove of the hanger insertion groove 223 of the seat plate 220 described above. The outer diameter of the metal wire rod of the hanger 230 has an outer diameter corresponding to the narrow width of the hanger insertion groove 223.

  In addition, although the example which uses the thing of a different wire diameter in the above case shows the hanger 130,230, of course, it is not restricted to this, The above-mentioned hanger insertion groove 122,123 or the hanger insertion groove 222,223 is mentioned. If the width and size are the same, they may be the same size.

  Further, the hanger 230 is not only guided through the hanger insertion groove 223 of the seat plate 220 disposed on the lower side, but also in the hanger insertion groove 123 of the seat plate 120 disposed on the upper side. Similarly, the guide is inserted vertically.

  Here, the hanger 130 and the hanger 230 are slidably guided in the vertical direction by the seat plate 120 and the seat plate 220 having the same shape and arranged in a pair in the vertical direction. At this time, each of the hangers 130 and 230 intersects in a cross shape in plan view, but the U-shaped space of the hanger 130 having a wide width is used as an intervening space for the hanger 230 having a narrow width. For this reason, even if the hanger 230 slides up and down, it does not contact.

  In addition, when the hanger 130 and the hanger 230 are assembled so as to intersect with a cross in plan view, in order to clearly represent both on the same drawing, one hanger 130 is displayed as it is in FIG. 1 and FIG. The other hanger 230 is displayed with its shape changed to a direction in which it can be easily seen.

  The coil spring 300 has a size that allows the above-described vertically supported hangers 130 and 230 to be inserted in a state of penetrating in the vertical direction, and can be freely expanded and contracted in the vertical direction. It is set as appropriate in accordance with the expected vibration during the operation of the supported body 200 and the expected normal earthquake.

The fine vibration absorber 400 is made of an elastomer such as natural rubber, low resilience rubber, various rubbers, or elastic resin. Since the fine vibration absorber 400 is an elastic member that absorbs the vibration of the coil spring 300 by bringing the fine vibration absorber 400 into contact with the coil spring 300, the outer diameter of the fine vibration absorber 400 is made slightly larger than the inner diameter of the coil spring 300 and contacted from the inside. (Or by fitting the inner diameter of the micro-vibration absorber 400 to be slightly smaller than the outer diameter of the coil spring 300), the contact between the micro-vibration absorber 400 and the coil spring 300 is enhanced. Further, the length of the micro-vibration absorber 400 is set to be substantially the same as the length of the coil spring 300 when extended (the free length when there is no load) so that the micro-vibration absorber 400 is in contact with the entire length regardless of the expansion / contraction of the coil spring 300. When attaching the micro-vibration absorber 400, the micro-vibration absorber 400 may be disposed on either the inner peripheral surface side or the outer peripheral surface side of the coil spring 300 so that the micro-vibration absorber 400 elastically contacts the coil spring 300 as described above.

  The anti-seismic coil spring 510 is configured as an example of the anti-seismic damper 500 for overload reduction. The anti-seismic coil spring 510 is formed to have a larger diameter than the coil spring 300. (Of course, when arranged inside the coil spring 300, it is formed to be slightly smaller in diameter than the inner diameter of the coil spring 300.) Therefore, when the coil spring 300 and the vibration reducing coil spring 510 are assembled concentrically, It will be arranged in a double ring.

  Further, the vibration reducing coil spring 510 is set shorter than the coil spring 300 in the length direction. For this reason, even when no load is applied or when a constant load (static load) is applied to the supported body 200 and the coil spring 300 is compressed, the space between the opposed surfaces of the seat plate 120 and the seat plate 220 is reduced. The vibration-reducing coil spring 510 is interposed in a state where a gap A that is a difference in length between the coil spring 300 and the vibration-reducing coil spring 510 is generated. In the range of the gap A, the coil spring 300 can be freely expanded and contracted independently between the opposed surfaces of the seat plate 120 and the seat plate 220. The compression starts only when an overload such as a large earthquake exceeding the gap A is input from the outside.

  Here, the clearance A is, in other words, the upper end position of the coil spring 300 compressed by a static load in the expansion / contraction direction (vertical direction in the figure) and the upper end position of the vibration reducing coil spring 510 where compression is started by an overload. Is the length of the upper and lower spaces formed between the two.

  As described above, only the coil spring 300 can cope with a static load (and vibration due to the operation of the supported body 200 or a normal earthquake), and a coil spring against an overload such as a large earthquake exceeding a normal earthquake. 300 and a vibration reducing coil spring 510 correspond. Therefore, for an overload such as a large earthquake, the spring reaction force of both the springs 300 and 510 of the coil spring 300 and the anti-seismic coil spring 510 works to deal with the overload. For this reason, the spring constant of the vibration reducing coil spring 510 is set to be at least equal to or greater than the spring constant of the coil spring 300. In addition, the lower end of the vibration reducing coil spring 510 is received by the upper surface of the seat plate 220 together with the coil spring 300 by its own weight.

  The elastic cylindrical body 520 provided as necessary is a cylindrical body having a diameter larger than that of the coil spring 300 and smaller than that of the vibration reducing coil spring 510 when the vibration reducing coil spring 510 is externally fitted to the coil spring 300. It is a member to partition. (Thus, in the case of the arrangement configuration in which the vibration reducing coil spring 510 is fitted in the coil spring 300, the elastic cylinder 520 used here is a cylinder having a larger diameter than the vibration reducing coil spring 510 and a smaller diameter than the coil spring 300. .) The upper peripheral edge 521 of the elastic cylinder 520 is fitted into an annular groove 125 formed on the lower surface of the seat plate 120, and the lower peripheral edge 522 is formed on the upper surface of the seat plate 220. It is fitted and attached to the groove 225 (see FIG. 1B). The elastic cylinder 520 is formed of an elastic material having a low sliding resistance such as fluoro rubber or elastomer in order to improve the elasticity of the springs 300 and 510. If the elastic cylindrical body 520 is not provided, there is no partition between the vibration reducing coil spring 510 and the coil spring 300, so that the winding direction of the vibration reducing coil spring 510 and the coil spring 300 is different to prevent entanglement between them. You can also

  As shown in FIG. 1, the seismic reduction device 10 that is extended and contracted by the ceiling suspension type configured as described above is configured to move the supported body 200 from the support 100 fixed to the ceiling portion 11 via the seismic reduction device 10. Suspended. In this case, the static load of the supported body 200 is applied to the seat plate 120 via the hooked portion 233 of the hanger 230, and the static load is applied so as to push down the seat plate 120 to the seat plate 220 side. The downward load applied to the seat plate 120 is applied so as to compress the coil spring 300, and the coil spring 300 is compressed against the urging force of the coil spring 300.

  When a relatively small external force (small earthquake) is received in this suspended state, the small external force is blocked or relaxed by the elastic expansion and contraction action of the inner coil spring 300 having a small spring constant, thereby suppressing the shaking of the supported body 200. On the other hand, when a strong impact force due to a large earthquake is transmitted to the vibration reducing device 10 in this suspended state, not only the coil spring 300 starts to be compressed as shown in FIG. The coil spring 510 starts to be compressed. Since this anti-seismic coil spring 510 has a hard spring property, the spring reaction force is doubled in combination with the coil spring 300 during compression, and the powerful impact force is moderated and reduced by the synergistic effect of these two springs 300 and 510. Of these, the anti-seismic coil spring 510 has the property that the compression resistance increases in proportion to the magnitude of the external force. Therefore, the compression resistance increases as a large earthquake occurs, and the strong impact force exerted on the support 100 is increased. It is killed. For this reason, it becomes an apparatus with high safety | security which cuts off the vibration of the to-be-supported body 200, and reduces or reduces it.

  Further, the vibration isolator 10 is brought into contact with the coil spring 300 to vibrate the coil spring 300 (high-frequency vibration generated by operation of the supported body 200 itself or high-frequency disturbance transmitted from the outside to the ceiling portion 11. ) Is absorbed, even if vibration with a high frequency is transmitted to the coil spring 300, the vibration is absorbed by the fine vibration absorber 400 by converting it into heat. Thus, even if surging (resonance phenomenon) occurs in the coil spring 300, it can be surely prevented.

  In addition, since the elastic cylinder 520 has elasticity, it expands and contracts with the expansion and contraction operation of the coil spring 300 and the anti-seismic coil spring 510, and further uses an elastic material (elastomer) with less sliding resistance, so The telescopic motion is smooth.

  As described above, even if a large earthquake occurs and a strong overload (a large impact force or a large vibration) is applied to the support body 100 of the ceiling portion 11, the coil spring 300 and the vibration reducing coil spring 510 expand and contract due to the large vibration. As a result, a large impact force or a large vibration to be transmitted to the supported body 200 can be alleviated, and a vibration of the supported body 200 or an impact applied to the supported body 200 can be reduced. In addition, in Example 1, although the countermeasure for preventing shaking of the suspended support object was described, the floor vibration object 10 is hung from the ceiling 11 and attached to the floor object as described above. It can also be used as a preventive measure against falling.

  Furthermore, it is possible to use a combination of a plurality of the above-described vibration reduction devices 10. For example, a composite support in which two of the above-described vibration-reducing devices 10 are prepared, and these vibration-reducing devices 10 are provided side-by-side symmetrically to support one supported body 200 located in the middle thereof from both the left and right sides. An example of the structure is shown in FIG.

  First, the left vibration isolator 10 locks the locking portion 131 at the top of the hanger 130 with the locking tool 110 of the support body 100 installed obliquely above the left side, and the locked portion 231 at the bottom of the hanger 230. Is held by the locked member 210 of the supported body 200 located at the lower center, and the left vibration isolator 10 supports the supported body 200 in an inclined state from the upper left side.

  Similarly, the seismic reduction device 10 on the right side locks the locking part 131 on the upper part of the hanger 130 with the locking tool 110 of the support body 100 installed obliquely upward on the right side, and the locked part 231 on the lower part of the hanger 230. Is locked to the locked member 210 of the supported body 200 located at the lower center, and the right side vibration isolator 10 supports the supported body 200 in an inclined state from the upper right side.

  When comprised in this way, the to-be-supported body 200 can be disperse | distributed and supported from both right and left sides. For this reason, compared with the case where the seismic-reduction apparatus 10 is used independently, a safer support structure is obtained. In particular, even if it receives an irregular impact force that is strong and has different swing directions such as a large earthquake, the vibration isolator 10 in the direction close to the swing direction can respond and instantaneously reduce the vibration.

[Example 2]
FIG. 6 shows another example of the vibration damping damper 500 incorporated in the vibration damping device 10, and FIG. 7 shows an operating state at the time of an overload input in which the vibration damping device 10 performs a vibration reducing action. The seismic reduction device 10 of the second embodiment has substantially the same configuration that is partially different from that of the first embodiment. The difference is the configuration of the vibration reduction damper 500. For this reason, description of the structure of the same part is abbreviate | omitted and only a different point is demonstrated.

  As described above, the vibration damping damper 500 is formed in a cylindrical shape by the elastic elastomer 530 so that the vibration damping coil spring 510 having a spring diameter larger than (or smaller than) the coil spring 300 and having a spring constant larger than that of the coil spring 300 can be expanded and contracted. This is constituted by a molded spring-enclosed cylinder 540.

  By molding the vibration reducing coil spring 510 with the elastic elastomer 530 in this way, the spring-sealed cylindrical body 540 can be compressed while having the entire elastic cylindrical shape, so that the expansion and contraction movement of the vibration reducing coil spring 510 is not hindered. Yes. For this reason, the vibration reducing coil spring 510 is expanded and contracted integrally in a state of being wrapped in an elastic material.

  Further, the spring-enclosed cylinder 540 is annularly arranged on the concentric circle of the coil spring 300 as described above, and the inner peripheral surface of the spring-enclosed cylinder 540 is in contact with the outer peripheral surface of the coil spring 300 (or in the reverse state). The spring-sealed cylindrical body 540 is incorporated with a gap A between the opposed surfaces of the seat plate 120 and the seat plate 220. In this case, since the elastic elastomer 530 exists between the anti-seismic coil spring 510 of the spring-enclosed cylinder 540, even if the winding directions of the coil spring 300 and the anti-seismic coil spring 510 are the same, they will not be entangled. The elastic cylinder 520 becomes unnecessary. Since the elastic elastomer 530 on the outer surface (or inner surface) of the spring-enclosed cylindrical body 540 is in contact with the coil spring 300, the same effect as the above-described fine vibration absorber 400 can be obtained.

  Even when the seismic reduction device 10 configured in this way is used, the spring-encapsulated cylindrical body 540 provided as the anti-seismic damper 500 can cope with the coil spring 300 even under a small load such as a normal earthquake. Although not compressed, when subjected to a strong overload such as a large earthquake, as shown in FIG. 7, the spring reaction at the time of compression of the vibration-reducing coil spring 510 having a large spring constant enclosed in the spring-sealed cylindrical body 540 is obtained. Resistance can be applied to a strong overload by force, and the transmission of the overload to the supported body 200 can be relaxed. Further, the spring-sealed cylindrical body 540 is a single body, and has a configuration in which three parts of the vibration reducing coil spring 510, the micro-vibration absorber 400, and the elastic cylindrical body 520 are combined into one as compared with the first embodiment. Therefore, it is possible to reduce the number of parts and facilitate handling.

[Example 3]
FIG. 8 shows another example of the vibration damping damper 500 incorporated in the vibration damping device 10, and FIG. 9 shows an operation state when the vibration damping device 10 receives external force that acts to reduce vibration. The seismic reduction device 10 of the third embodiment has substantially the same configuration, which is partially different from that of the first embodiment. The difference is the configuration of the vibration reduction damper 500. For this reason, description of the structure of the same part is abbreviate | omitted and only a different point is demonstrated.

  The seismic damper 500 uses a cylinder 570 and a piston 580 to obtain a flow resistance during a compression stroke. The seismic damper 500 has a gap A between the opposed surfaces of the seat plate 120 and the seat plate 220. It is set as the structure which provides and interposes.

  As shown in FIG. 8A, the above-described cylinder 570 includes a cylindrical body having an internal space 560 in which a viscous body 550 having a high flow resistance such as a liquid or a liquid medium is loaded. The cylinder 570 is interposed between the opposed surfaces of the seat plate 120 and the seat plate 220, and as shown in FIG. 8C, a plurality of cylinders 570 are equally divided in the circumferential direction. It is a thing.

  Further, the cylinder 570 is provided with a reinforcing disk 591 as a reinforcing support 590. This reinforcing disk 591 is a hollow disk in which the same number of cylinder insertion holes 592 as the number of cylinders installed are equally divided in the circumferential direction, and each cylinder 570 is inserted into and supported by each cylinder insertion hole 592. Further, the coil spring 300 is housed in the hollow portion 593 of the reinforcing disk 591.

  Further, the reinforcing disc 591 is configured to be firmly fixed by three reinforcing discs 591 that support the upper and lower portions of the cylinder 570 and the intermediate portion thereof, and these reinforcing discs 591 are vertically connected by connecting pieces 594. It is connected and integrated in the direction. For this reason, each cylinder 570 is firmly held by the reinforcing support 590 to ensure a stable stroke operation of a piston 580 described later. The above-mentioned reinforcing support 590 uses a single hollow cylindrical body instead of the combination of the reinforcing disk 591 and the connecting piece 594, and is divided into a plurality of cylinders by equally dividing the hollow cylindrical body in the circumferential direction. The hole 592 may be provided so as to penetrate therethrough. In addition, it is possible to enlarge the cylinder 570 and the piston 580 themselves and omit the reinforcing member.

  Note that the cylinder 570 is not limited to a concentric circle and is formed by equally dividing a plurality of cylinders, but one cylinder 570 may be arranged at the center of the vibration damping device 10 although not shown. Further, the length of the cylinder 570 is set to be shorter than the length between the opposing surfaces of the seat plates 120 and 220 of the seat plate 120 and the seat plate 220 in a state where the load of the supported body 200 is applied. Yes. In other words, a gap A is provided between the lower surface of the reinforcing support 590 and the upper surface of the seat plate 220, and the facing distance between the seat plates 120 and 220 can be sufficiently expanded and contracted so that the coil spring 300 corresponds to the normal load. Provided.

  The above-described piston 580 is formed by a long shaft (piston bar) 581 and a disk-shaped resistance plate 582 provided at the lower end thereof. As shown in FIG. 8B, a holding shaft portion 583 having a diameter larger than that of the long shaft 581 is provided at the base end portion (upper end portion) of the long shaft 581. The cylinder 570 engages with the upper end opening 570a. The holding shaft portion 583 and the long shaft 581 that are suspended below the seat plate 120 extend from the upper end opening portion 570a of the cylinder 570 to the inner space 560 and housed therein.

  Then, the resistance plate 582 attached to the tip of the piston 580 is constantly immersed in the viscous body 550 in the cylinder 570, and if an excessive load (earthquake energy) is input in this state, as shown in FIG. The coil spring 300 is deflected beyond the gap A, the seat plate 220 is lifted and comes into contact with the lower surface of the reinforcing support 590 integrated with the cylinder 570, and when this is lifted, the viscous body 550 is connected to the resistance plate 582 and the inside of the resistance plate 582. It receives resistance when passing through a narrow gap with the space 560, converts a part of the input excessive seismic energy into heat and absorbs it, and greatly reduces the vibration transmitted to the supported body 200.

  In the above-described embodiment, the configuration example of the ceiling-suspended-type seismic reduction device 10 has been described. In the ceiling suspension type, while the upper part of the suspension object (supported body 200) is suspended and the lower part is lifted, the floor installation type places the floor object on the floor surface. Since the upper part is supported by the vibration isolator 10 so as not to fall down, it can be applied as it is without changing the structure of the vibration absorber 10. Moreover, although the above-mentioned seismic-reduction device 10 showed the example which supports the to-be-supported body 200 perpendicularly | vertically, as shown also in FIG. 5, it can also support and comprise in directions other than perpendicular directions, such as an oblique direction. .

DESCRIPTION OF SYMBOLS 10 ... Anti-seismic device 100 ... Support body 120 ... Seat plate 121 ... Insertion space 130 ... Hanger 200 ... Supported body 220 ... Seat plate 221 ... Insertion space 230 ... Hanger 300 ... Coil spring 400 ... Micro vibration absorber 500 ... Damping damper 510 ... Damping coil spring 520 ... Elastic cylinder 540 ... Spring-sealed cylinder 550 ... Viscous body 560 ... Internal space 570 ... Cylinder 580 ... Piston A ... Gap

Claims (4)

A telescopic vibration reduction device that allows expansion and contraction between a support and a supported body,
A seat plate provided near the support body with an insertion space penetrating in the expansion and contraction direction;
A seated plate facing the seat plate and provided near the supported body, having a to-be-inserted space that is penetrated in a telescopic direction at a facing position of the insertion space,
Between the opposing surfaces of the seat plate and the seat plate, a coil spring disposed so as to contact the periphery of the insertion space and the insertion space;
A micro-vibration absorber disposed between upper and lower opposing surfaces of the seat plate and the seat plate and having substantially the same length as the coil spring, so as to contact the coil spring from the inside, or to the coil spring The micro-vibration absorber arranged to fit externally;
The coil spring expands and contracts, and is arranged so as to surround the outer periphery of the coil spring or along the inner periphery, and is set shorter than the coil spring so that there is a gap between the facing surfaces of the seat plate and the seat plate. And an anti-vibration damper for overload reduction that starts compression only when an overload exceeding the gap is input from the outside,
Formed at the locking portion attached to the support, at least two arm portions extending in the same direction from both sides of the locking portion and inserted into the insertion space of the seat plate, and at the distal end portion of the arm portion A hanger configured with a hook portion that is inserted through the insertion space of the seat plate and is locked to the support-side end of the seat plate,
A locked portion attached to the supported body, at least two armed portions that extend in the same direction from both sides of the locked portion, and are inserted into the inserted space of the seat plate, A hanger to be hung, which is formed at the tip of the armed portion and is inserted into the insertion space of the seat plate and is hooked to the support side end of the seat plate. An anti-seismic device characterized by   2. The vibration reduction device according to claim 1, wherein the vibration reduction damper is a vibration reduction coil spring and has a spring constant equal to or greater than a spring constant of the coil spring.   The anti-seismic damper is a spring-enclosed cylinder, and the spring-enclosed cylinder is formed by molding an anti-seismic coil spring having a spring constant equal to or greater than the spring constant of the coil spring into a cylindrical shape with an elastic elastomer. The vibration-reducing device according to claim 1, wherein The vibration damping damper is composed of a cylinder and a piston,
The cylinder has an internal space filled with a viscous material,
The vibration reducing device according to claim 1, wherein the piston extends from the seat plate and is freely inserted into a viscous body in the internal space of the cylinder.

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