JP7055390B2 - An air seismic isolation leveling valve device and a seismic isolation device provided with the air seismic isolation leveling valve device. - Google Patents

Description

The present invention relates to an air seismic isolation leveling valve device capable of accurately adjusting the height direction of a seismic isolation object even in a fine range, and a seismic isolation device including the air seismic isolation leveling valve device.

The leveling valve in the conventional air-type seismic isolation device has a problem that the range of adjustment in the height direction is coarse, and it is difficult to make fine height adjustment such as in units of 1 mm.

In addition, the conventional products have a slow response to height adjustment, and are structurally externally mounted types, and many of them have insufficient configurations for space saving.

In Patent Document 1, a horizontal seismic isolation mechanism is installed on a bearing surface, a vertical seismic isolation mechanism is provided on the upper surface of the horizontal seismic isolation mechanism, and a mounted object is supported on the vertical seismic isolation mechanism. It is a three-dimensional seismic isolation device in which a leveling mechanism is arranged between the mounted object and the bearing surface. The vertical seismic isolation mechanism supplies and exhausts compressed air from a compressor. It consists of an air spring that expands and contracts due to the above, and the leveling mechanism is interposed in the conduit of the air pipe connecting the compressor and the air spring, and is supported so as to be relatively movable on the bearing surface. Disclosed is a seismic isolation device configured by comprising a leveling valve and an arm that opens and closes the leveling valve, and connecting this arm to the above-mentioned mounting side.

However, although the leveling mechanism in Patent Document 1 can move the mounted object downward or upward while suppressing upward or downward shaking of the mounted object, the mounted object can be returned to a predetermined height position, but the height of the mounted object is high. It is not a configuration that can realize fine adjustment such that the range of direction adjustment is in units of 1 mm.

Further, the leveling mechanism in Patent Document 1 has a configuration in which the vertical seismic isolation mechanism is separately arranged between the mounted object and the bearing surface, and is not sufficient for space saving.

Japanese Unexamined Patent Publication No. 11-264446

The present invention has been developed in view of the above circumstances in the past, and can accurately adjust the height direction of the seismic isolation object even in a fine range, and between the seismic isolation base and the seismic isolation bed. To provide a seismic isolation leveling valve device equipped with an air seismic isolation leveling valve device and the air seismic isolation leveling valve device that can realize space saving as a configuration in which the main part is installed in an air spring (air type bellows) arranged in the air spring (air type bellows). Is.

In the present invention, the seismic isolation base and the seismic isolated floor on which the seismic isolated object is placed are arranged, and the main part is incorporated in an air spring that bulges by air supply to raise the seismic isolated floor. An air seismic isolation leveling valve device that adjusts the leveling of the air spring, between the lower flat plate arranged on the seismic isolation base side, the upper flat plate arranged on the seismic isolation floor side, and the lower flat plate and the upper flat plate. A leveling valve main body including a swellable air spring arranged in the air spring, a cylinder built in the air spring, and a piston protruding toward the upper flat plate, and the air spring built in the lower flat plate. It has a seismic isolation auxiliary pipe, a cylinder of the leveling valve body, and an air supply piping system that branches and supplies seismic isolation air from an air source to the seismic isolation auxiliary pipe.
The cylinder has a pressurizing hole that is closed when the piston reaches the top dead center position, and the air in the cylinder is pressurized in the range from the bottom dead center position to the top dead center position of the piston. An air flow path leading to the hole is provided, and the upper flat plate is provided with a floating height adjuster with a release hole in which the upper end of the piston abuts and is closed, and air from the seismic isolation assist pipe is directed to the outside. A seismic isolation air hole that can flow out is provided, and the amount of air in the sliding direction is controlled by the air flowing from the air supply piping system through the seismic isolation auxiliary pipe, and the top dead center from the bottom dead center position of the piston. Depending on the sliding position of the piston in the range up to the position, the piston reaches the top dead center position of the air spring from the air supply piping system to the inside of the cylinder, the air flow path, and the air passing through the pressurizing hole. When the seismic isolation bed is levitated to a predetermined height, the pressurizing hole is closed, the air spring contracts due to a load change of the seismic object on the seismic isolation bed, and the piston descends. Opens the pressurizing hole in conjunction with the descent of the piston, supplies air from the air flow path through the pressurizing hole into the air spring, and places the piston at the top dead center position of the air spring. The most important feature is that it is configured to adjust the leveling of the air spring that restores to the predetermined height.

According to the invention of claim 1, the adjustment in the height direction of the seismic isolation object can be accurately performed even in a fine range, the amount of air on the sliding side can be controlled, and the seismic isolation base and the seismic isolation bed can be controlled. It is possible to realize and provide an air seismic isolation leveling valve device that can realize space saving as a configuration in which the main part is installed in the air spring arranged between them.

According to the invention described in claim 2, the adjustment in the height direction of the seismic isolated object can be accurately performed even in a fine range, the amount of air on the sliding side can be controlled, and the height of the air spring when the load changes. We have realized and provided an air seismic isolation leveling valve device that can save space by incorporating the main part in the air spring placed between the seismic isolation base and the seismic isolation floor while being able to respond to changes. can do.

According to the invention of claim 3, in the invention of claim 1 or 2, the air that can also adjust the levitation height of the seismic isolation floor via the upper flat plate by the levitation height adjuster with the release hole. A seismic isolation leveling valve device can be realized and provided.

According to the invention of claim 4, in the invention of claim 1 or 2, the seismic isolation air hole is configured to exert the function of air outflow to the outside, so that the amount of air on the sliding side is controlled. It is possible to realize and provide an air seismic isolation leveling valve device that can accurately execute the above.

According to the invention of claim 5, in the invention of claim 2, the air is controlled by adjusting the position and the hole diameter of the hole group provided in the sleeve and controlling the flow rate of the air in the air supply piping system. Since the height of the spring can be adjusted with fine dimensions, it is possible to realize and provide an air seismic isolation leveling valve device capable of adjusting the height of the air spring with fine dimensions.

According to the invention of claim 6, a plurality of air springs are arranged between the seismic isolation base and the seismic isolation bed, and the air seismic isolation leveling valve device according to any one of claims 1 to 5 is provided for each air spring. Based on the interior structure, the seismic isolation floor can be raised and lowered evenly, and each air seismic isolation leveling valve device that achieves the above effects is housed in each air spring, which saves space in the seismic isolation device itself. It is possible to realize and provide a seismic isolation device that can realize the realization.

FIG. 1 is a schematic front view of a seismic isolation device including an air seismic isolation leveling valve device according to an embodiment of the present invention. FIG. 2 is a schematic plan view of a seismic isolation device (composed of four air springs) including an air seismic isolation leveling valve device according to the present embodiment. FIG. 3 is a schematic side view of a seismic isolation device including an air seismic isolation leveling valve device according to the present embodiment. FIG. 4 is a schematic enlarged cross-sectional view of an air seismic isolation leveling valve device in which a main part is incorporated in an air spring according to the present embodiment. FIG. 5 is a seismic isolation floor operation diagram during normal, ascending, and ascending seismic isolation in the seismic isolation device according to this embodiment. FIG. 6 is a leveling valve main body operation diagram when the piston is pushed up and the air spring is swollen in the air seismic isolation leveling valve device according to the present embodiment. FIG. 7 is an operation diagram of the leveling valve main body at the time of pushing up the piston and at the end of swelling of the air spring in the air seismic isolation leveling valve device according to the present embodiment. FIG. 8 is an operation diagram of the leveling valve main body when the height of the air spring is lowered due to a load change in the air seismic isolation leveling valve device according to the present embodiment. FIG. 9 is a leveling valve main body operation diagram showing a state in which the supply air is stopped and the air spring air is bleeded by operating the one-way valve in the air seismic isolation leveling valve device according to the present embodiment. FIG. 10 is a position explanatory view showing a bottom dead center position, an intermediate point position, a top dead center position, and a position 1 mm below the top dead center in the leveling valve main body of the air seismic isolation leveling valve device according to the present embodiment.

The present invention can accurately adjust the height direction of the seismic isolation object even in a fine range, and has a configuration in which the main part is built in an air spring arranged between the seismic isolation base and the seismic isolation bed. For the purpose of realizing and providing an air seismic isolation leveling valve device that can also realize space saving, it is placed between the seismic isolation base and the seismic isolation floor on which the seismic object is placed, and by air supply. An air seismic isolation leveling valve device in which the main part is built in an air spring that bulges to raise the seismic isolation floor and adjusts the leveling of the air spring, and a lower flat plate arranged on the seismic isolation base side. An upper flat plate arranged on the seismic isolation floor side, a swellable air spring arranged between the lower flat plate and the upper flat plate, a cylinder built in the air spring, and a piston protruding toward the upper flat plate. The leveling valve main body to be provided, the seismic isolation auxiliary pipe built in the air spring on the lower flat plate, the cylinder of the leveling valve main body, and the seismic isolation auxiliary pipe from the air source. It has an air supply piping system that is branched and supplied, and the cylinder is provided with a pressure hole that is closed when the piston reaches the top dead point position and a gap with respect to the inner wall of the cylinder. A tubular sleeve for supporting the sliding of the piston and a tubular sleeve provided at a plurality of locations on the thick portion of the sleeve, and air supplied from the air supply piping system into the cylinder is allowed to pass through the gap. An air flow path composed of a group of holes for air flow leading to the pressurized hole is provided, and the upper flat plate is provided with a floating height adjuster with a release hole in which the upper end portion of the piston abuts and is closed. A seismic isolation air hole that allows air from the seismic isolation auxiliary pipe to flow out to the outside is provided, and the amount of air in the sliding direction is controlled by the air flowing from the air supply piping system through the seismic isolation auxiliary pipe. The air from the air supply piping system to the inside of the cylinder, the air flow path, and the air passing through the pressurizing hole according to the sliding position of the piston in the range from the bottom dead point position to the top dead point position of the piston. The spring is inflated to a predetermined height at which the piston reaches the top dead point position to raise the seismic isolation bed, the pressurizing hole is closed, excess air is released from the release hole, and the cover on the seismic isolation bed is provided. When the air spring contracts due to a change in the load of the seismic isolation object and the piston descends, the pressure hole is opened in conjunction with the descent of the piston to open the air flow path. Air is supplied into the air spring through the pressurizing hole to adjust the leveling of the air spring to restore the air spring to a predetermined height at which the piston reaches the top dead point position, and the air pressure in the air spring is adjusted. When the piston rises above the top dead point, the leveling of the air spring that bleeds air from the release hole and restores the piston to a predetermined height to reach the top dead point is adjusted, and the air supply piping system is used. By stopping the supply of air from, the air in the air spring is evacuated from the seismic isolation auxiliary pipe, the piston is lowered to bleed the air in the piston, and the seismic isolation bed is restored to the initial position via the upper flat plate. Realized by.

Hereinafter, the air seismic isolation leveling valve device and the seismic isolation device including the air seismic isolation leveling valve device according to the embodiment of the present invention will be described in detail with reference to the drawings.

First, the seismic isolation device 51 including the air seismic isolation leveling valve device 1 according to the present embodiment will be described with reference to FIGS. 1 to 3.

The seismic isolation device 51 of this embodiment is an air isolation device installed in a flat seismic isolation base (base plate) 61 installed on the floor or the ground and air springs 2 distributed on the seismic isolation base 61. It has a seismic leveling valve device 1 (for example, four in this embodiment) and a seismic isolation floor 71 connected in parallel to the seismic isolation base 61 on each of the air seismic isolation leveling valve devices 1. , The seismic isolation action of each air spring 2 inside each air seismic isolation leveling valve device 1 is configured to perform vertical or horizontal seismic isolation to the seismic isolated object placed on the seismic isolation floor 71. are doing.

At the four corners of the lower surface of the seismic isolation floor 71, four landing columns 72 project toward the seismic isolation base 61, and in normal times (when there is no earthquake), the lower ends of each landing column 72. Each side is in contact with the upper surface of the seismic isolation base 61, and the seismic isolation floor 71 is configured to stably support the seismic isolation base 61 above the seismic isolation base 61.

A neutral horizontal spring support portion 73 is attached to the central portion of the lower surface of the seismic isolation floor 71, and four spring fasteners 74 are arranged at 90 degree intervals on the lower surface of the neutral horizontal spring support portion 73. Has been done.

On the other hand, on the seismic isolation base 61 side, the lower surface of the seismic isolation floor 71 is arranged so as to correspond to the periphery of the neutral horizontal spring support portion 73 and is arranged at 90 degree intervals in normal time (when there is no earthquake). Four columnar pedestals 62 that come into contact with the erection are erected.

A spring fastener 63 is arranged in the vicinity of the upper end portion of each of the gantry portions 62.

Then, between the four spring fasteners 74 on the side of the horizontal spring support portion 73 for neutralization and the spring fasteners 63 on the side of each pedestal portion 62, a total of four spring fasteners are used between the ones arranged opposite to each other. The horizontal springs 64 are hung on each.

Each of the four air springs 2 contains a main part of the air seismic isolation leveling valve device 1 according to the present embodiment, which will be described in detail later.

Next, the air seismic isolation leveling valve device 1 according to the present embodiment will be described in detail with reference to FIG.

Note that FIG. 4 shows a state in which the air spring 2 bulges to a predetermined height.

As shown in an enlarged view in FIG. 4, the air seismic isolation leveling valve device 1 has an upper flat plate 41 having a recessed portion 41a on the upper surface side to be brought into contact with the lower surface side of the seismic isolation floor 71 via an air sealing material 43. The air spring 2 is provided with a lower flat plate 42 fixedly arranged on the seismic isolation base 61 at a predetermined interval, and is arranged between the lower surface of the upper flat plate 41 and the upper surface of the lower flat plate 42. The main part is decorated.

The air spring 2 includes a hollow upper bellows 3a to be joined to the upper flat plate 41 by using a bolt 4, a hollow lower bellows 3b to be joined to the upper surface side of the lower flat plate 42 by using a bolt 4, and the above. It is located between the upper bellows 3a and the lower bellows 3b, and has an integral structure with the bellows main body 3 formed in a hollow ellipsoidal shape.

As shown in FIG. 4, the air seismic isolation leveling valve device 1 according to the present embodiment is arranged in the air spring 2 and the leveling valve main body 11 arranged in the air spring 2, and the upper end portion thereof is an upper flat plate. The seismic isolation auxiliary pipe 21 (the material thereof is made of flexible, for example, nylon, polyurethane, etc.) joined to the lower surface of the 41, and the leveling valve main body 11 and the seismic isolation auxiliary pipe 21 from the outside of the lower flat plate 42. It has an air supply piping system 31 that supplies air for seismic isolation.

The air supply piping system 31 is configured to branch the air from the air supply source pipeline 32 by the first branch joint 33 and supply it to the leveling valve main body 11 and the seismic isolation auxiliary pipe 21. There is.

More specifically, the air supply piping system 31 includes the air supply source pipeline 32 constituting the air path A, the first branch joint 33, the air path B on the leveling valve main body 11 side, and the seismic isolation. It has an air path C on the auxiliary pipe 21 side.

The air path B includes a connection pipe 23, a joint 24, and an air supply pipe 25 penetrating the lower flat plate 42 on one joint opening side of the first branch joint 33, and is provided on the upper surface of the lower flat plate 42. It is configured to supply the air branched by the first branch joint 33 into the cylinder 12 of the attached leveling valve main body 11.

The air path C is provided with an air supply pipe 17 and a second branch joint 18 penetrating the lower flat plate 42 on the other joint opening side of the first branch joint 33, and one of the second branch joint 18 is provided. The lower end of the seismic isolation auxiliary pipe 21 is connected to the joint opening side, and a one-way valve 22 that operates at the time of air exhaust is provided on the other joint opening side of the second branch joint 18 via the connection pipe 19 and the joint 20. It is configured by connecting.

Here, the leveling valve main body 11 will be described in detail below.

The leveling valve main body 11 includes a cylinder 12 attached vertically upward to the upper surface of the lower flat plate 42, and a piston rod 13 that slides vertically and vertically in the cylinder 12.

The cylinder 12 is provided with an insertion hole for the piston rod 13 and a pressure hole 12b through which air can flow in the upper end piece 12a, and the lower end side is opened so that air from the air supply pipe 25 can flow in. A cylinder cylinder 14 that has been formed, a sleeve 15 that is fixedly arranged while having a predetermined gap G inside the inner wall of the cylinder cylinder 14, and an inner wall portion that is directly below the pressure hole 12b of the cylinder cylinder 14 and the outer periphery of the upper end of the sleeve 15. It is provided with an inner cylinder upper seal portion 16a arranged between the cylinder cylinder 14 and a cylinder inner lower seal portion 16b arranged on the lowermost inner wall of the cylinder cylinder 14 facing the air supply pipe 25.

The sleeve 15 has a first hole 15a communicating with the outer gap G of the sleeve 15 at a position near the upper sealing portion 16a in the cylinder, and a gap G below the first hole 15a at a predetermined distance. The second hole 15b communicating with the second hole 15b, the third hole 15c communicating with the gap G below the second hole 15b at a predetermined interval, and the third hole 15c communicating with the gap G at a position near the lower sealing portion 16b in the cylinder. It is provided with a group of four holes forming an air flow path including the fourth hole 15d.

The piston rod 13 is configured to perform vertical vertical movement while sliding the sliding contact sealing material 13c wound around the outer periphery of the base portion 13a to the inner wall of the sleeve 15.

Further, the rod portion 13b of the piston rod 13 has its upper end side facing the levitation height adjuster 44 provided on the upper flat plate 41 side.

In addition to the air sealing material 43, the upper flat plate 41 includes a screw-type levitation height adjuster 44 having a release hole 45 and having an adjustable protrusion dimension of the piston rod 13 toward the rod portion 13b, and the upper flat plate 41. A seismic isolation air hole 46, which is bored at a position corresponding to the upper end of the seismic isolation auxiliary pipe 21 and is capable of circulating air in the seismic isolation auxiliary pipe 21, that is, air in the air path C, is arranged. There is.

Next, the seismic isolation operation of the seismic isolation device 51 including the air spring 2 and the air seismic isolation leveling valve device 1 according to the present embodiment will be described with reference to FIGS. 5, 6 to 9 and 10.

FIG. 5 shows the operating state of the seismic isolation floor 71 during normal time, ascending, and ascending seismic isolation in the seismic isolation device according to the present embodiment.

FIG. 6 shows the operating state of the leveling valve main body 11 when the air spring 2 swells when the piston 13 is pushed up, and FIG. 7 shows the leveling valve main body when the air spring 2 bulges when the piston 13 is pushed up. FIG. 8 shows the operating state of the leveling valve main body 11 when the height of the air spring 2 is lowered due to a load change, and FIG. 9 shows the operating state of the leveling valve main body when the air is bleeded when the air supply is stopped. Each of the operating states of 11 is shown.

In the seismic isolation device 51 including the air spring 2 and the air seismic isolation leveling valve device 1 according to the present embodiment, when pushing up the piston 13 of the air seismic isolation leveling valve device 1 and expanding the air spring 2. As shown in FIG. 6, the air from the air path A branches at the first branch joint 33, passes through the air supply pipe 17, the second branch joint 18, and the seismic isolation auxiliary pipe 21 of the air path C, and is exempted. By flowing out from the seismic air hole 46 to the outside of the air sealing material 43, it is possible to control the amount of air in the sliding direction.

Further, the air from the air path A passes through the connection pipe 23 of the air path B, the joint 24, and the air supply pipe 25 penetrating the lower flat plate 42 through the first branch joint 33, reaches the inside of the cylinder 12, and reaches the piston. While pushing up 13, the air spring 2 further passes through the fourth hole 15d, the first hole 15a to the third hole 15c, the gap G, and the pressure hole 12b of the sleeve 15 and reaches the inside of the air spring 2 to swell the air spring 2.

At this time, the upper end of the rod portion 13b of the piston rod 13 closes the release hole 45 of the levitation height adjuster 44.

Next, at the end of the expansion of the air spring 2, as shown in FIG. 7, the air from the air path A branches at the first branch joint 33, and the air supply pipe 17 and the second branch joint of the air path C 18. By passing through the seismic isolation auxiliary pipe 21 and flowing out from the seismic isolation air hole 46 to the outside of the air seal material 43, it is possible to control the amount of air in the sliding direction.

Further, the air from the air path A passes through the connection pipe 23 of the air path B, the joint 24, and the air supply pipe 25 penetrating the lower flat plate 42 through the first branch joint 33, and reaches the inside of the cylinder 12. However, since the base portion 13a of the piston rod 13 has already been pushed up and the pressure hole 12b is closed, the swelling operation of the air spring 2 is stopped.

At this time, the excess air in the air spring 2 flows out of the release hole 45 from a slight gap between the upper end of the rod portion 13b of the piston rod 13 and the lower end of the levitation height adjuster 44, and further, the air. It flows out to the outside of the sealing material 43.

Next, the case where the height of the air spring 2 is lowered due to the load change will be described with reference to FIG.

In this case, as shown in FIG. 8, the air from the air path A branches at the first branch joint 33, the air supply pipe 17 of the air path C, the second branch joint 18, and the seismic isolation auxiliary pipe 21. By allowing the air to flow out from the seismic isolation air hole 46 to the outside of the air seal material 43, the amount of air on the slip direction side can be controlled.

Further, when the height of the air spring 2 is lowered due to the load change, that is, when the piston rod 13 is lower than the case shown in FIG. 7 and the height of the seismic isolation bed 71 is lowered, as shown in FIG. Air from the air path A is supplied into the cylinder 12 through the connection pipe 23 of the air path B, the joint 24, and the air supply pipe 25 penetrating the lower substrate 42 through the first branch joint 33. The piston rod 13 is raised, and the sleeve 15 is further passed through the fourth hole 15d, the first hole 15a to the third hole 15c, the gap G, and the pressure hole 12b to supply air to the air spring 2. The spring 2 is inflated and the height of the seismic isolation bed 71 is returned to the original height.

At this time, the upper end of the rod portion 13b of the piston rod 13 closes the release hole 45 of the levitation height adjuster 44.

Next, when the supply of air from the air path A is stopped, as shown in FIG. 9, the air in the cylinder 12 passes through the air path B, the first branch joint 33, and the air path A. The air is exhausted, the piston rod 13 is pushed down, and the air in the air spring 2 is exhausted from the one-way valve 22 in the flow path passing through the first branch joint 33 and the air path A, and the air spring 2 is exhausted. Shrinks.

As a result, the landing support column 72 of the seismic isolation floor 71 also descends and lands on the seismic isolation base 61.

By the above operation, it is possible to accurately and quickly control the amount of air on the sliding side and the height position of the air spring 2.

In connection with the operation shown in FIGS. 6 and 7 described above, the seismic isolation floor 71 changes from the normal state shown in the lower column of FIG. 5 to the ascending state shown in the middle column of FIG.

The figure in the upper column of FIG. 5 shows the state of the seismic isolation device 51 due to the seismic motion at the time of ascending seismic isolation. Move as shown.

Further, FIG. 10 shows the bottom dead center position of the piston 13 in the leveling valve main body 11 of the air seismic isolation leveling valve device 1 according to the present embodiment (the leftmost column of FIG. 10) and the intermediate point position (the first in FIG. 10). The figure in column 2), the position of the top dead center (the figure in the third column of FIG. 10), and the position of being lowered by, for example, 1 mm from the top dead center (the figure in the rightmost column of FIG. 10) are shown.

That is, the piston 13 moves from the bottom dead center position shown in the leftmost column of FIG. 10 to the intermediate point position shown in the second column of FIG. 10 in the operation shown in FIGS. 6 and 7 described above. It is pushed up to the top dead center position shown in the third column of FIG. 10, and at the same time, the air spring 2 swells to the state shown in FIG. 7.

Further, when the piston 13 is pushed down from the top dead center to, for example, a 1 mm lowering position as shown in the rightmost column of FIG. 10 due to a load change, the operation is the same as that shown in FIG. Return the piston 13 to the top dead center position.

Further, in the case where the air pressure in the air spring 2 rises too much and the piston 13 reaches the top dead center and then rises further, air is bleeded from the release hole 45 to raise the piston 13. The leveling of the air spring 2 that restores to a predetermined height reaching the dead center position is adjusted.

Further, by stopping the supply of air from the air supply piping system 31, the air in the air spring 2 is evacuated from the one-way valve 22, and the seismic isolation floor 71 is restored to the initial position via the upper flat plate 41.

According to the air seismic isolation leveling valve device 1 built in the air spring 2 according to the present embodiment described above, the height of the air spring 2 changes due to the load change of the seismic object in the seismic isolation device 51. Controlling the flow rate of air flowing into the cylinder 12 via the air path A, the first branch joint 33, and the air path B, that is, if the air spring 2 has a large sinking, the air flow rate is increased and the sinking occurs. If it is small, it can be quickly restored to the optimum height by controlling to reduce the air flow rate.

Further, by controlling the flow rate of the air flowing into the air spring 2 by adjusting the positions and hole diameters of the first hole 15a to the fourth hole 15d of the sleeve 15, the height of the air spring 2 can be adjusted to, for example, in units of 1 mm. It can also be adjusted with such fine dimensions.

In addition, the air from the air path A is configured to flow out from the seismic isolation air hole 46 to the outside of the air seal material 43 through the seismic isolation auxiliary pipe 21 on the air path C side via the first branch joint 33. Therefore, it is possible to control the amount of air on the sliding side.

Further, according to the seismic isolation device 51 including the air seismic isolation leveling valve device 1 built in the air spring 2 according to the present embodiment, a plurality of the air springs 2 are provided between the seismic isolation base 61 and the seismic isolation floor 71. For example, four) The seismic isolation floor 71 can be raised and lowered uniformly based on the arranged configuration, and the seismic isolation device 1 is housed in each air spring 2. It is possible to save space in the 51 itself.

The air seismic isolation leveling valve device of the present invention can be widely used for seismic isolation devices using air springs, vibration damping devices, and the like.

1 Air seismic isolation leveling valve device 2 Air spring 3 Bellows body 3a Upper bellows 3b Lower bellows 4 Bolt 11 Leveling valve body 12 Cylinder 12a Upper end piece 12b Pressurized hole 13 Piston rod 13a Base 13b Rod part 13c Sealing material 14 Cylinder cylinder 15 Sleeve 15a 1st hole 15b 2nd hole 15c 3rd hole 15d 4th hole 16a Cylinder inner upper seal part 16b Cylinder inner lower seal part 17 Air supply pipe 18 2nd branch joint 19 Connection pipe 20 Joint 21 Seismic isolation auxiliary pipe 22 One-way valve 23 Connection pipe 24 Joint 25 Air supply pipe 31 Air supply piping system 32 Air supply source pipeline 33 First branch joint 41 Upper flat plate 41a Recessed part 42 Lower flat plate 43 Air seal material 44 Lifting height adjuster 45 Release hole 46 Seismic isolation Air hole 51 Seismic isolation device 61 Seismic isolation base 62 Mount part 63 Spring fastener 64 Neutral horizontal spring 71 Seismic isolation floor 72 Landing support 73 Neutral horizontal spring support 74 Spring fastener G Gap

Claims (6)

It is placed between the seismic isolation base and the seismic isolation floor on which the seismic isolated object is placed, and the main part is installed in the air spring that swells by air supply to raise the seismic isolation floor. An air seismic isolation leveling valve device that adjusts leveling.
A lower flat plate arranged on the seismic isolation base side and an upper flat plate arranged on the seismic isolation floor side.
A leveling valve main body including a swellable air spring arranged between the lower flat plate and the upper flat plate, a cylinder built in the air spring, and a piston protruding toward the upper flat plate.
The seismic isolation auxiliary pipe installed in the air spring on the lower flat plate,
The cylinder of the leveling valve body, the air supply piping system that branches and supplies the seismic isolation air from the air source to the seismic isolation auxiliary pipe, and
Have,
The cylinder has a pressurizing hole that is closed when the piston reaches the top dead center position, and the air in the cylinder is pressurized in the range from the bottom dead center position to the top dead center position of the piston. An air flow path leading to the hall is provided,
The upper flat plate has a floating height adjuster with a release hole in which the upper end of the piston abuts and is closed, and a seismic isolation air hole that allows air from the seismic isolation auxiliary pipe to flow out to the outside. Provide,
The amount of air in the sliding direction is controlled by the air flowing from the air supply piping system through the seismic isolation auxiliary pipe, depending on the sliding position of the piston in the range from the bottom dead center position to the top dead center position of the piston. The air spring is inflated from the air supply piping system to a predetermined height at which the piston reaches the top dead center position by the air passing through the cylinder, the air flow path, and the pressurizing hole to levitate the seismic isolation bed. At the same time, the pressure hole is closed.
When the air spring contracts due to a change in the load of the seismic object on the seismic isolation floor and the piston descends, the pressure hole is opened in conjunction with the descent of the piston and the air flow path is used. The leveling of the air spring is adjusted so that air is supplied into the air spring through the pressure hole to restore the air spring to a predetermined height at which the piston reaches the top dead point position.
An air seismic isolation leveling valve device featuring. It is placed between the seismic isolation base and the seismic isolation floor on which the seismic isolated object is placed, and the main part is installed in the air spring that swells by air supply to raise the seismic isolation floor. An air seismic isolation leveling valve device that adjusts leveling.
A lower flat plate arranged on the seismic isolation base side and an upper flat plate arranged on the seismic isolation floor side.
A leveling valve main body including a swellable air spring arranged between the lower flat plate and the upper flat plate, a cylinder built in the air spring, and a piston protruding toward the upper flat plate.
The seismic isolation auxiliary pipe installed in the air spring on the lower flat plate,
The cylinder of the leveling valve body, the air supply piping system that branches and supplies the seismic isolation air from the air source to the seismic isolation auxiliary pipe, and
Have,
The cylinder has a pressure hole that is closed when the piston reaches the top dead center position, and a cylindrical sleeve that is attached to the inner wall of the cylinder with a gap to support the sliding of the piston. , An air composed of a group of holes for air flow, which are provided in a plurality of thick portions of the sleeve and allow air supplied from the air supply piping system into the cylinder to pass through the gap and lead to the pressurized hole. With a flow path,
The upper flat plate has a floating height adjuster with a release hole in which the upper end of the piston abuts and is closed, and a seismic isolation air hole that allows air from the seismic isolation auxiliary pipe to flow out to the outside. Provide,
The amount of air in the sliding direction is controlled by the air flowing from the air supply piping system through the seismic isolation auxiliary pipe, depending on the sliding position of the piston in the range from the bottom dead center position to the top dead center position of the piston. The air spring is inflated from the air supply piping system to a predetermined height at which the piston reaches the top dead center position by the air passing through the cylinder, the air flow path, and the pressurizing hole to levitate the seismic isolation bed. At the same time, the pressurized hole is closed and excess air is released from the release hole.
When the air spring contracts due to a change in the load of the seismic object on the seismic isolation floor and the piston descends, the pressure hole is opened in conjunction with the descent of the piston and the air flow path is used. The leveling adjustment of the air spring that supplies air into the air spring through the pressurizing hole and restores the air spring to a predetermined height at which the piston reaches the top dead point position is performed, and the air pressure in the air spring rises. If the piston reaches the top dead point and then rises further, the leveling of the air spring is adjusted to bleed air from the release hole and restore the piston to a predetermined height to reach the top dead point position. With
By stopping the supply of air from the air supply piping system, the air in the air spring is evacuated from the one-way valve, the piston is lowered to bleed the air in the piston, and the seismic isolation bed is set to the initial position via the upper flat plate. It was configured to be restored,
An air seismic isolation leveling valve device featuring. The air seismic isolation leveling valve device according to claim 1 or 2, wherein the levitation height adjuster with a release hole adjusts the levitation height of the seismic isolation floor via the upper flat plate. The air seismic isolation leveling valve device according to claim 1 or 2, wherein the seismic isolation air hole exerts a function of air outflow to the outside. The claim is characterized in that the height of the air spring can be finely adjusted by adjusting the position and hole diameter of the hole group provided in the sleeve and controlling the flow rate of air in the air supply piping system. The air seismic isolation leveling valve device described in 2. A plurality of air springs are arranged between the seismic isolation base and the seismic isolation floor, and each air spring is equipped with the air seismic isolation leveling valve device according to any one of claims 1 to 5. Seismic isolation device.

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