JP2005351450A - Small diameter ball forced circulation rolling passage structure and small diameter ball circulation passage structure for supporting rolling ball base isolation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To forcedly roll a small diameter rolling steel ball 2 by its own force and let it roll and enter between a bowl-like load receiving rolling passage panel 1 and a large diameter rolling steel ball 3 without letting it remain on the halfway irrespective of direction to roll for base isolation by providing the small diameter rolling steel ball 2 between them securely when earthquake vibration occurs. <P>SOLUTION: A forced circulation covering lid 5 constituted by providing many small diameter rolling steel balls 2 in the middle to cover almost all the parts of an outer surface of the large diameter rolling steel ball 3 and providing an elastic body 8 between two layers of the bowl-like load receiving rolling passage panel 1, an outer shell plate 6, and a movable pressing type rolling plate 7 is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a rolling ball seismic isolation bearing formed by combining a small-diameter rolling steel ball and a large-diameter rolling steel ball used between the ground and the seismic isolation object, and more specifically, the outer surface of the large-diameter rolling steel ball A small-diameter rolling steel ball is interposed in the majority, and the intervening small-diameter rolling steel ball is pressed against the large-diameter rolling steel ball using a movable press-type rolling plate that uses the elasticity of the elastic body. Regardless of the direction of the rolling force of the steel ball, the small-diameter rolling steel ball is forced to roll by itself and reliably enters between the saddle-shaped load-bearing rolling base and the large-diameter rolling steel ball. A large-diameter rolling steel ball is placed between a large-diameter rolling steel ball and a large-diameter rolling steel ball on a small-diameter forced-circulation rolling path structure capable of shaking A large number of small-diameter rolling steel balls are placed, and the small-diameter rolling steel balls contact the entire outer surface of the lower hemisphere. Relates to a small-diameter ball circulation passage structure for rolling seismic isolation circulate undergoing rolling force of the large diameter rolling rising steel ball effectively.

  A seismic isolation device combining a small-diameter rolling steel ball and a large-diameter rolling steel ball is already widely known. For example, Japanese Patent Laid-Open No. 2000-291727 or Japanese Patent Registration No. 2885681 is known, and these small-diameter rolling steel ball circulation systems do not allow the small-diameter rolling steel ball to roll by itself, but push-up sliding circulation by other force. System. As described in Japanese Patent Laid-Open No. 2000-291727, a large number of ball bearings b are interposed in the concave gap A1 between the bearing ball B and the downwardly approximately funnel-shaped ball sheet 41 to receive the rolling force of the bearing ball B during earthquake motion. The ball bearings b that have undergone rolling isolation and have been subjected to rolling isolation are transferred sequentially from the concave gap A1 to the annular curved gap A2, and the ball bearings b that have entered the annular curved gap A2 are successively recessed concave A1. Is pushed by the ball bearing b which is transferred from the ball bearing b, and is sequentially pushed into the annular curved gap A3 which is the circulation path of the ball bearing b by the rolling force of the ball bearing b in the concave gap A1 instead of rolling by itself. The ball seat 41 is slid into the upper end shaft 41b, which is the apex of the ball seat 41, and falls into the annular curved gap A2 on the opposite side. rear It is said that it is pushed again to enter the concave gap A1 and performs the rolling isolation again. At this time, the gap width in the annular curved gaps A2 and A3 is set larger than the diameter of the ball bearing b.

Also in Patent Registration No. 2885681, the small-diameter ball 22 performs rolling isolation between the large-diameter ball 12 and the pedestal 19, and the small-diameter ball 22 that has undergone rolling isolation is placed in the gap 21, while the small-diameter ball during rolling isolation is being used. It is said that the ball 22 is pushed up by the rolling force of the ball 22 and slides in, enters again from the gap 21 on the opposite side, and performs rolling isolation between the large-diameter ball 12 and the base 19. At this time, the gap width in the gap 21 is set larger than the diameter of the small-diameter ball 22.

Japanese Patent Laid-Open No. 2000-291727 states that the base plate 2 is installed on the base 1 with the upper surface “a” facing upward. In Japanese Patent Registration No. 2885681, the cradle 10 is installed on the base 1 with the concave portion 11 facing upward. It is said that.
JP 2000-291727 A Patent Registration No. 2885681

  In Japanese Patent Application Laid-Open No. 2000-291727, a large number of ball bearings b are interposed in a concave gap A1 between a bearing ball B that rolls on the upper surface of a base plate 2 installed on a base 1 and a downward substantially funnel-shaped ball sheet 41. The ring-shaped curved gap A3, which is the circulation path of the ball bearing b, is positioned above the concave gap A1. Therefore, there is no way for the ball bearing b to roll and circulate by itself, and the circulating force has to rely on the rolling force of the ball bearing b that rolls in the concave gap A1. A large number of ball bearings b already exist on the ball seat 41 that is at the upper position and becomes an uphill, and a new ball bearing b is passed through the annular curved gap A2 after many existing ball bearings b. Thus, a strong push-up force is required to slide up to the top of the annular curved gap A3.

  Among the many ball bearings b intervening in the concave gap A1 during earthquake motion, the ball bearing b that can expect the maximum rolling force to slide up to the top of the annular curved gap A3 via the annular curved gap A2 The ball bearing b is located on the center line in the rolling direction of the bearing ball B from the ball bearing b in contact with the top of the ball B, and a small number of ball bearings b are located on the parallel lines near the left and right of the center line. Even if it is located in the rolling direction, the pushing-up rolling force of many other ball bearings b away from the center line cannot be expected so much.

  Therefore, with the rolling power of a small number of ball bearings b where the above-mentioned rolling power can be expected, the top is slid up from the back of many ball bearings b that are accommodated so as to fill the annular curved gap A3. It is also assumed that a sliding push-up force that causes the ball bearing b to fall from the side of the upper end shaft portion 41b cannot be obtained, and it is assumed that many ball bearings b are stagnating in the annular curved gap A3. At this time, the push-up force of the ball bearing b flowing into the concave gap A1 from the annular curved gap A2 on the opposite side is said to use the load of the subsequent ball bearing b, but it often falls from the side of the upper end shaft portion 41b. If the ball bearing b cannot be expected, the push-up force will be insufficient, and it is expected that it will remain in the annular curved gap A2 without entering the concave gap A1, and if it stops at the front side, the subsequent ball bearing b cannot advance, It is assumed that the space between the ball bearing b and the support ball B in the concave gap A1 may temporarily slide.

  Similarly, in Patent Registration No. 2885681, a large number of balls 22 are loaded in the gap 21 that is an upper position and is an uphill, and the small diameter during rolling isolation between the large diameter ball 12 and the lower surface of the pedestal 19 is used. Due to the rolling force of the balls 22, a strong push-up force is required to push them up from behind a large number of loaded small-diameter balls 22 and smoothly slide them in. Similarly, it is assumed that the ball 22 is stagnating in the gap 21.

  Further, in Japanese Patent Laid-Open No. 2000-291727, when the base plate 2 is installed on the seismic isolation body, a stronger sliding push-up force is required to allow the ball bearing b to enter the concave gap A1, It is said that the base plate 2 is installed on the base 1, but there is a high probability that a foreign object will enter between the upper surface 2a and the rolling bearing ball B. I can't. When the base plate 2 used for many years is installed on the base 1, its maintenance management is not easy.

Patent registration No. 2885681 also requires a stronger sliding push-up force as described above, and therefore, it is said that the cradle 10 with the concave portion 11 facing upward is installed on the foundation 1. There is a high probability that a foreign object will enter, and if there is a foreign object, reliable rolling isolation cannot be continued. If the cradle 10 used for many years is installed on the foundation 1, its maintenance management is not easy.

  In both of the above cases, it is assumed that the ball bearing b and the small-diameter ball 22 are not likely to roll by their own force, but rely on other forces to increase the probability that the sliding sliding circuit structure will trigger trouble.

  The present invention uses the rolling force of the ball bearing b or small-diameter ball 22 during rolling isolation of the above-described prior art to cause the ball bearing b or small-diameter ball 22 during rolling isolation to move to the annular curved gap A3 at a higher position. Alternatively, the ball bearing b or the small-diameter ball 22 is pushed up and slid into the gap 21, and another circulation path structure other than the sliding circulation path structure for pushing the concave gap A1 or between the large-diameter ball 12 and the lower surface of the base 19 is used. As a result, a small-diameter rolling steel ball is pressed onto the majority of the outer surface of the large-diameter rolling steel ball using a movable pressing-type rolling plate that uses the elasticity of the elastic body, and receives the rolling force of the large-diameter rolling steel ball during earthquake motion. Regardless of the direction, the small-diameter rolling steel ball can be forced to roll forcibly, so that it can be reliably transferred between the saddle-shaped load receiving roadbed and the large-diameter rolling steel ball, and can be isolated from rolling. Small diameter rolling steel ball is surely self-supporting in any direction By enabling dynamic circulation, it is possible to install a plate-shaped rolling disk on either the base side or the base side of the seismic isolation object. A large number of small-diameter rolling balls between a rolling-path structure and a large-diameter rolling steel ball and a lower-hemisphere of a large-diameter rolling ball on a rolling-isolated and climbing slope base with a concave open hemispherical shape. The load of the seismic isolation object is placed in the rolling direction of the large-diameter rolling steel ball through the plate-shaped rolling plate placed on the top of the large-diameter rolling steel ball. Effectively acting on the rolling motion of the large-diameter rolling steel balls in the upward rolling direction and pressing the large-diameter rolling steel balls against the rolling seismic isolation and uphill roadbed. Rolling steel balls effectively receive the rolling force of large diameter rolling steel balls, follow the rolling seismic isolation and forcibly roll on the uphill roadbed, and if they do not roll forcibly In response to the strong pushing force of the small-diameter rolling steel balls during rolling isolation, the remaining concave hemispherical rolling isolation and climbing base is easily slid up and enters the small-diameter circuit. A small-diameter ball circulation path structure with a rolling-ball-isolation bearing that can reliably roll-in from a small-diameter ball circulation path between a rolling-isolation and climbing roadbed and a large-diameter rolling steel ball. It is an issue to provide.

  The invention of claim 1 is provided with a saddle-shaped load receiving roadbed provided with a large number of small-diameter rolling steel balls interposed between a saddle-shaped load receiving roadbed of small-diameter rolling steel balls and a large-diameter rolling steel ball. An elastic body in which a circular circular forced circulation cover that is vertically divided into a plurality of pieces is provided on the entire circumference of the roadbed end of the roadbed, and the necessary elastic pressing force is provided between the two layers of the outer shell plate and the movable pressing type rolling plate A steel ball holding / circulating edge board is attached to one end edge of the outer shell plate by screwing, and a part of a large diameter rolling steel ball protrudes from the steel ball holding / circulating edge board. In the shape, a forced circulation cover is provided so as to cover the majority of the large-diameter rolling steel balls, and a small-diameter spherical forced circulation rolling path is formed between the two, and a connecting edge plate is formed on the other edge of the outer shell plate. A large number of small-diameter rolling rings are formed in a small-diameter forced circulation rolling path formed by covering and forming both connecting edge plates on the circumferential edge of the base of the saddle-shaped load receiving rolling base. A steel ball is inserted and an interconnection plate is provided on the edge side of the outer shell plate with a steel ball holding and circulation edge, and each interconnection plate is screwed together to form an integral forced circulation cover. This is a configuration of a small-sphere forced circulation rolling path structure of a rolling ball seismic isolation bearing.

A small-circular ball forced circulation rolling path that rolls by rolling a large number of small-diameter rolling steel balls in contact with the majority of the outer surface of the large-diameter rolling steel balls, so that it has the same width as the saddle load receiving roadbed. The movable pressing type is formed as an arc-shaped forced circulation cover that can be easily disassembled and attached to a plurality of sheets, and the forced circulation cover is an elastic pressing force required between the outer shell plate and the movable pressing type rolling plate. A large-diameter rolling steel is formed during earthquake motion by forming an elastic body with an elastic pressing force that presses the small-diameter rolling steel ball in the small-diameter forced circulation rolling path through the rolling plate against the large-diameter rolling steel ball. When the ball rolls, the small-diameter rolling steel ball intervening in the middle is in contact with both the large-diameter rolling steel ball and the movable press-type rolling plate to directly and effectively secure the rolling force of the large-diameter rolling steel ball. Force self-rolling in any direction, surely forced self-rolling circulation and large-diameter rolling Ri and UtatedoIri in between the steel balls, performing rolling seismic isolation.

  In addition, the small diameter rolling steel ball can be reliably contacted with the large diameter rolling steel ball in any direction by using a movable pressing type rolling plate using the elastic pressing force of the elastic body. By being capable of forced self-rolling circulation, it is possible to install and use a dish-shaped rolling board on either the foundation side or the base side of the seismic isolation object.

  The invention of claim 2 is a movable pressing type as an elastic pressing force required by an elastic body that forms an arc-shaped forced circulation cover and is interposed between two layers of an outer shell plate and a movable pressing rolling plate. A rubber elastic body with elastic pressing force that presses the small-diameter rolling steel ball in the small-diameter ball forced circulation rolling path through the rolling plate against the large-diameter rolling steel ball is interposed, and the outer shell is used with normal temperature adhesive on both sides 2. The structure of a small-sphere forced circulation rolling path structure of a rolling ball seismic isolation bearing according to claim 1, which is bonded to a plate and a movable pressing type rolling plate.

  The invention according to claim 3 is a movable pressing type as an elastic pressing force required by an elastic body that forms an arc-shaped forced circulation cover and is interposed between two layers of an outer shell plate and a movable pressing rolling plate. A rubber elastic body with elastic pressing force that presses the small-diameter rolling steel ball in the small-circular ball forced circulation rolling path against the large-diameter rolling steel ball via a rolling plate is interposed, and an adhesive is applied to both sides to apply pressure and heat. 2. A structure of a small-diameter forced circulation rolling path structure of a rolling ball seismic isolation bearing according to claim 1, which is bonded.

  According to a fourth aspect of the present invention, an elastic body that forms an arc-shaped forced circulation cover and is interposed between two layers of an outer shell plate and a movable pressing type rolling plate is an appropriate elastic body, and the required elastic pressing member. Movable pressing type that has elastic pressing force that presses the small diameter rolling steel ball in the small diameter ball forced circulation rolling path against the large diameter rolling steel ball via the movable pressing type rolling plate as pressure Provided with an elastic pressure adjuster with one end side of a plurality of push rods fixed to the back side of the rolling plate, the other end side freely penetrating the outer shell plate and projecting outside, and the push rod end with a screw structure 2. The structure of a small-diameter ball forced circulation rolling path structure of a rolling ball seismic isolation bearing according to claim 1, wherein the elastic pressing force can be adjusted from the outside of the outer shell plate by an elastic pressing adjuster.

  According to the invention of claim 5, a small-diameter rolling steel ball is placed between a large-diameter rolling steel ball and a lower-hemisphere of a large-diameter rolling steel ball on a rolling-isolation and climbing roadbed of an upwardly open concave hemispherical surface. In addition, a large number of small-diameter rolling steel balls are placed, and the horizontal center line height of the large-diameter rolling steel balls placed is substantially aligned with the height of the rolling base-isolated and uphill roadbed edge. An arc-shaped circulation path cover plate that is vertically divided into a plurality of sheets is provided on the entire circumference of the end, and a steel ball holding and circulation edge plate is attached to one end edge of the circulation path cover plate and screwed to provide a holding and circulation of the steel ball. A road width that is wider than the diameter of the small-diameter rolling steel ball, which is provided so as to cover the majority of the large-diameter rolling steel ball in a shape in which a part of the large-diameter rolling steel ball protrudes from the edge board. A small-diameter circular circulation path is formed, and a connection edge plate is provided on the other end edge of the circulation road cover plate, and a connection edge plate is also provided on the peripheral edge of the road base end of the rolling seismic isolation and climbing road base. A large number of small diameter rolling steel balls are inserted into the small-diameter ball circulation path formed in this way, and an interconnection plate is provided on the edge of the circulation path lid plate with a steel ball holding and circulation edge board. This is a configuration of a small-diameter ball circulation path structure of a rolling ball seismic isolation bearing, in which the plates are screwed together to form an integral circulation path lid plate.

Installed on a base that is integrated with the rolling seismic isolation and uphill roadbed, placed on the top of a large-diameter rolling steel ball and placed on the base of the base isolation object The load of the seismic isolation object is received by the large-diameter rolling steel ball, and during earthquake motion, the load of the seismic isolation object is effective in the rolling direction of the large-diameter rolling steel ball, and in the upward rolling direction of the large-diameter rolling steel ball. The large-diameter rolling steel balls are pressed against the rolling base isolation and climbing roadbed by the large-diameter rolling steel balls located in contact with each other, so that the small-diameter rolling steel balls in the upward rolling direction are large-diameter rolling steel balls. In the case where the rolling force is forced to self-roll on the base of the hill and the climbing slope is not forcedly rolled, the rolling of the small-diameter rolling steel ball during the subsequent rolling seismic isolation Receiving the driving force of the power, the remaining concave hemispherical rolling isolation and climbing roadbed can be easily slid and pushed up. Surely move in to the road.

A small-diameter rolling steel ball in a small-diameter ball circulation path with a width that is appropriately wider than the diameter of the small-diameter rolling steel ball is confused between rolling and sliding due to the rotation of the large-diameter rolling steel ball and the subsequent small-diameter rolling steel ball. It is easy to move in, and easily falls into the space between the rolling seismic isolation and climbing roadbed and the large-diameter rolling steel ball, and the base is isolated.

  In the invention of claim 1, a small-diameter ball forced circulation rolling path for rolling a large-diameter rolling steel ball with a large number of small-diameter rolling steel balls in close contact with the majority of the outer surface of the large-diameter rolling steel ball is continuous with the bowl-shaped load receiving rolling base. In order to have the same width, a plurality of sheets are formed with an arc-shaped forced circulation cover that can be easily disassembled and detached, and the forced circulation cover is further required between the outer shell plate and the movable pressing type rolling plate. As a pressing force, an elastic body having an elastic pressing force that presses a small-diameter rolling steel ball in a small-diameter ball forced circulation rolling path against a large-diameter rolling steel ball via a movable pressing-type rolling plate is interposed. Therefore, when a large-diameter rolling steel ball rolls during an earthquake motion, the small-diameter rolling steel ball interposed in the middle is in close contact with both the large-diameter rolling steel ball and the movable pressing rolling plate due to the elastic pressing force. Receiving the rolling force of rolling steel balls directly and reliably, forced self-rolling in any direction without stagnation it can. Therefore, under any seismic motion situation, the small diameter rolling steel ball circulates in the small diameter ball forced circulation rolling path, and self-rolling between both the bowl-shaped load receiving rolling base and the large diameter rolling steel ball. And make sure the rolling seismic isolation.

  By using a movable pressing type rolling plate that can be pressed and moved by the elastic force of the elastic body, the small-diameter rolling steel ball performs forced self-powered rolling circulation regardless of the vertical rolling direction. Even if it is installed on either side of the foundation or the base of the seismic isolation object, the rolling circulation of the small diameter rolling steel ball is performed normally. Therefore, it is possible to provide a dish-shaped rolling board on the base side of the seismic isolation object, and when it is provided, maintenance management of the dish-shaped rolling board over many years is much easier.

  The arc-shaped forced circulation cover that is vertically divided into a plurality of pieces and can be easily attached and detached enables easy insertion and maintenance of small-diameter rolling steel balls. There is no part that requires special precision in manufacturing, and it can be manufactured economically.

  The saddle load bearing roadbed has a simple shape due to its single function that supports and rolls the load of the seismic isolation object, and the center of gravity of the saddle load bearing roadway path becomes lower, which stabilizes the load of the seismic isolation object during earthquake motion. To support.

  In the unlikely event that a plate-shaped rolling board is provided on the base side of the seismic isolation object, using the mounting base provided integrally with the bowl-shaped load receiving rolling base, the elastic body should be elastically pressed. Even when the pressure is lost and the pressing force of the movable pressing type rolling plate is insufficient, the load of the seismic isolation object is received through the plate-shaped rolling plate mounted on the top of the large diameter rolling steel ball. The large-diameter rolling steel ball works effectively in the upward rolling direction of the large-diameter rolling steel ball during an earthquake motion, and the large-diameter rolling steel ball turns the small-diameter rolling steel ball in the upward rolling rolling path into a movable pressing rolling plate. The pressing action works, and the small diameter rolling steel ball receives the rolling force of the large diameter rolling steel ball and forcibly rolls on the movable pressing type rolling plate. In addition, when there is no forced self-rolling, the small-diameter rolling steel ball is slid up in the small-circular forced circulation rolling path due to the strong pushing force of the small-diameter rolling steel ball during the subsequent rolling isolation. In any case, the circulation is ensured and the rolling isolation is ensured.

In the invention of claim 2, the movable pressing type as an elastic pressing force required by the elastic body that forms the arc-shaped forced circulation cover and is interposed between the two layers of the outer shell plate and the movable pressing type rolling plate. A rubber elastic body with elastic pressing force that presses the small-diameter rolling steel ball in the small-diameter forced circulation rolling path through the rolling plate against the large-diameter rolling steel ball is interposed. A small-diameter ball forced circulation rolling path using the most economical movable pressing type rolling plate is obtained by being bonded to the plate and the movable pressing type rolling plate.

  In the invention of claim 3, the elastic body interposed between the two layers of the outer shell plate forming the arc-shaped forced circulation cover and the movable pressing type rolling plate has a movable pressing type rolling force as the required elastic pressing force. A rubber elastic body with elastic pressing force that presses the small-diameter rolling steel ball in the small-diameter ball forced circulation rolling path through the moving plate against the large-diameter rolling steel ball is interposed, and adhesive is applied to both sides to apply pressure and heat. As a result, strong adhesion can be obtained, and even when a small diameter rolling steel ball performs rolling with a severe change during earthquake motion, the outer shell plate and the movable pressing type rolling plate are separated, A small-diameter spherical forced circulation rolling path using a movable pressing type rolling plate is obtained, which is less likely to lose the function of performing forced self-rolling circulation.

  In the invention of claim 4, the elastic body interposed between the two layers of the outer shell plate forming the arc-shaped forced circulation cover and the movable pressing type rolling plate is an appropriate elastic body, and the required elastic pressing force. The movable push type rolling plate with an elastic body having an elastic pressing force that presses the small diameter rolling steel ball in the small diameter ball forced circulation rolling path against the large diameter rolling steel ball via the movable pressing type rolling plate. Economical elasticity with a simple structure in which one end side of a plurality of push rods is fixed to the back side of the moving plate, the other end side is freely penetrated by the outer shell plate and protrudes to the outside, and the push rod end is provided with a screw structure. By providing the pressing adjuster, the pressing force of the movable pressing type rolling plate can be adjusted by adjusting the screw of the elastic pressing adjuster from the outside of the arc-shaped forced circulation cover. Small-diameter ball forced circulation rolling path using a movable pressing-type rolling plate that can adjust the pressing force to the small-diameter rolling steel ball and prevent problems caused by the strength of the elastic pressing force. Is obtained. With the arc-shaped forced circulation cover that is vertically divided into a plurality of sheets and can be easily attached and detached, it is possible to remove a part of the arc-shaped forced circulation cover and adjust the pressing force while visually observing.

  In the invention of claim 5, the horizontal center line of the large-diameter rolling steel ball is obtained by interposing a large number of small-diameter rolling steel balls on the upward-opening concave hemispherical rolling isolation and climbing roadbed of the small-diameter rolling steel balls. Highly concave hemispherical rolling base isolation and climbing slope basement edge circumferential edge height is almost aligned, and rolling base isolation and climbing road base are integrated as a continuous base isolation and climbing base. As a result, during the earthquake motion, the load of the seismic isolation object is distributed and is effective in the rolling direction of the large-diameter rolling steel ball, and a large number of small-diameter rolling balls positioned in the upward rolling direction of the large-diameter rolling steel ball. Large diameter rolling steel balls are pressed against rolling base isolation and climbing slope base, and they are in close contact with each other, so that small diameter rolling steel balls in the ascending rolling direction effectively increase the rolling force of large diameter rolling steel balls. In the case of forced self-rolling on the base of rolling isolation and climbing slope, The remaining concave hemispherical rolling isolation and climbing roadbed can be easily slid up by receiving the strong rolling force of the small-diameter rolling steel ball during motion isolation. Move securely into the circuit.

A small-diameter rolling steel ball rolling into the small-diameter ball circulation path is a mixture of rolling and sliding due to the rotational action of the upper hemisphere of the large-diameter rolling steel ball and the subsequent pushing force of the small-diameter rolling steel ball. It is possible to make sure to fall into the rolling seismic isolation and climbing roadbed on the side opposite to the rolling direction of the rolling steel balls and to make the rolling seismic isolation.

Since the plate-shaped rolling table is provided on the base side of the seismic isolation object, maintenance management of the plate-shaped rolling plate over many years is much easier. A small-diameter circular circuit using the simplest and stable shape of rolling isolation and climbing roadbed is obtained.

  FIG. 1 is a longitudinal sectional view of a rolling ball base isolation bearing showing a small-sphere forced circulation rolling path structure A of a rolling ball base isolation bearing embodying the present invention, and FIG. 2 is a cross-sectional view of a CC section of FIG. FIG. 3 is a partially cutaway front view of a rolling ball seismic isolation bearing with some arc-shaped forced circulation cover 5 removed. In the figure, a straight arrow indicates a moving direction, and an arc arrow indicates a rotating direction. In the following drawings, the case where the dish-shaped rolling board 20 is provided on the base 21 side of the seismic isolation object will be described, but the same applies to the case where the dish-shaped rolling board 20 is provided on the base 19 side. The small-diameter rolling steel ball 2 is forced to roll forcibly and securely moves between the saddle-shaped load receiving roadbed 1 and the large-diameter rolling steel ball 3 to perform rolling isolation, so use the drawings to explain. Is omitted.

  1, 2, and 3, a large-diameter rolling steel ball 3 is formed by interposing a number of small-diameter rolling steel balls 2 on a saddle-shaped load receiving roadbed 1 made of iron or the like having a strength that can support a seismic isolation object. Is provided. The length of the bowl-shaped arc of the bowl-shaped load receiving roadbed 1 is equal to or more than one quarter of the circumference of the large-diameter rolling steel ball 3 provided. The load is effectively distributed and supported through the small diameter rolling steel balls 2, and the small diameter rolling steel balls 2 can be seismically isolated during earthquake motion. Shortening reduces stability.

Necessary circular arc-shaped forced circulation cover 5 vertically divided into a plurality of sheets is provided between the outer shell plate 6 and the movable pressing type rolling plate 7 on the circumferential edge 4 of the roadbed end of the saddle-shaped load receiving rolling roadbed 1. An appropriate elastic body 8 having an elastic pressing force is interposed, and a steel ball holding / circulating edge board 9 is additionally attached to one end edge of the outer shell plate 6 by screwing (not shown). A forced circulation cover 5 is provided so as to cover the majority of the large-diameter rolling steel ball 3 in a shape in which a part of the large-diameter rolling steel ball 3 protrudes from the ball holding and circulation edge board 9, and the bowl-shaped load receiving rolling roadbed 1 and Large-diameter rolling steel ball 3 A small-diameter ball forced circulation rolling path 10 of the small-diameter rolling steel ball 2 continuous between the two is formed. The larger the number of divisions of the forced circulation cover 5 is, the easier the handling is. However, the forced circulation cover 5 may be appropriately divided in consideration of the difficulty of production and the economy.

The outer shell plate 6 and the movable pressing type rolling plate 7 are formed by selecting from light metals such as aluminum, iron materials, etc., and the outer shell plate 6 has a small diameter rolling steel ball 2 and a large diameter due to an unexpected shear force during earthquake motion. The strength required to hold the rolling steel ball 3 at the current position and the strength necessary to hold the small diameter rolling steel ball 2 and the large diameter rolling steel ball 3 at all times with the attached steel ball holding and circulation edge board 9 are required. It is. The rolling surface of the movable press-type rolling plate 7 needs to have friction resistance, heat resistance, etc. that can withstand the small diameter rolling steel ball 2 performing severe rolling with many changes during earthquake motion. The rolling surface is more likely to roll without the slipping of the small-diameter rolling steel ball 2 when the surface is a rough surface than the polished surface. No special roughening process is required.

The elastic body 8 is a steel plate spring, steel coil spring, rubber elastic body or the like, and presses the small-diameter rolling steel ball 2 against the rolling large-diameter rolling steel ball 3 via the movable pressing-type rolling plate 7 during an earthquake motion. As long as the small-diameter rolling steel ball 2 receives the rolling force of the large-diameter rolling steel ball 3 and the small-diameter rolling steel ball 2 has an elastic pressing force capable of rolling on the movable pressing type rolling plate 7, any of them can be used. If the elastic pressing force is too strong, frictional heat is generated strongly. If it is weak, the rolling power cannot be obtained effectively. The optimal elastic body 8 is selected and used in advance from the viewpoint of maintenance and durability.

When the steel elastic body 8 is used, rust prevention measures are necessary. When the rubber elastic body 8 is used, heat resistance, durability, reduction in elastic force, and the like are taken into consideration. It arrange | positions so that the movable press-type rolling plate 7 may be pressed uniformly. When a rubber elastic body is used, a clearance allowance for lateral elongation during compression is required. Further, an appropriate method may be used as the attachment method.

The width of the small-diameter ball forced circulation rolling path 10 when the small-diameter rolling steel ball 2 is interposed between the movable pressing type rolling plate 7 and the large-diameter rolling steel ball 3, that is, the elastic body 8 is in a compressed state. The width of the road needs to be the same width as the diameter of the small diameter rolling steel ball 2, and the elastic pressing force of the elastic body 8 is applied to the small diameter rolling steel ball 2. If the elastic body 8 is compressed beyond the diameter of the small-diameter rolling steel ball 2 and the road width is widened, the small-diameter rolling steel ball 2 cannot roll. An appropriate road width holding mechanism 25 that prevents the road width of the small-diameter ball forced circulation rolling path 10 from expanding beyond the diameter of the small-diameter rolling steel ball 2 is provided between the movable pressing type rolling plate 7 or the outer shell plate 6 or both. It is necessary to provide in.

The steel ball holding / circulating edge board 9 holds the large-diameter rolling steel ball 3 and the small-diameter rolling steel ball 2 to prevent separation from the current position, and circulates to induce the small-diameter rolling steel ball 2 during rolling. Also used as an edge.

A connection edge plate 11 is provided on the other end edge of the outer shell plate 6 of the forced circulation cover 5 divided into a plurality of sheets, and a connection edge plate 11 is also provided on the road base end circumferential edge 4 of the bowl-shaped load receiving rolling road base 1. Are inserted into a small diameter ball forced circulation rolling path 10 to be formed by covering with a naked child 12, and a large number of small diameter rolling steel balls 2 are inserted. It can be easily inserted by inserting it sideways so as to form a shape.

The total amount of small-diameter rolling steel balls 2 existing in the small-diameter forced circulation rolling path 10 and on the bowl-shaped load receiving rolling base 1 is the same as that in the small-diameter forced circulation rolling path 10 and the saddle-shaped load receiving rolling base 1. It may be filled up with all of the above, or it may be inserted slightly less. The point is that a small diameter rolling steel ball 2 is required to have a quantity that can be circulated and rolled continuously without interruption between the two sides during earthquake motion. Since the small-diameter rolling steel ball 2 is forced to roll by itself, there is no fear of stagnation in the small-diameter ball forced circulation rolling path 10.

Further, an interconnecting plate 13 is provided on the edge side of the outer shell plate 6 to which the steel ball holding / circulating board 9 is attached, and the interconnecting plates 13 are screwed together (not shown) to perform integral forced circulation. It is formed on the cover 5 to form a small-sphere forced circulation rolling path structure of a rolling ball seismic isolation bearing.

FIG. 4 shows a rubber elastic body 14 (hereinafter referred to as a rubber elastic body using a normal temperature adhesive and a rubber elastic body that has been pressurized and heat bonded) as an elastic body 8, and a small-sphere forced circulation rolling path. 10 is a longitudinal half cross-sectional view of a rolling ball seismic isolation bearing showing a small-diameter forced circulation rolling path structure A for explaining the protruding state of the movable pressing type rolling plate 7 when the small-diameter rolling steel ball 2 is not yet transferred into FIG. 5 shows a rolling ball seismic isolation bearing showing a small diameter ball forced circulation rolling path structure A showing a contraction state of the movable pressing type rolling plate 7 when the small diameter rolling steel ball 2 is moved into the small diameter ball forced circulation rolling path. FIG.

4 and 5, the rubber elastic body 14 as the elastic body 8 pushes the small-diameter rolling steel ball 2 in the small-diameter ball forced circulation rolling path 10 against the large-diameter rolling steel ball 3 via the movable pressing rolling plate 7. Either a general-purpose rubber elastic body 14 having an elastic pressing force to be applied or a rubber elastic body 14 formed by pressure and heat bonding may be used. It is selected and used appropriately in consideration of economy and strong adhesiveness. It is arranged between both the concave inner surface side of the outer shell plate 6 and the convex outer surface side of the movable pressing type rolling plate 7 so as to press the movable pressing type rolling plate 7 evenly as a plate or an appropriate shape. Glue. A clearance allowance space for lateral expansion when the rubber elastic body 14 is compressed is required between them.

If the elastic pressing force that presses the small-diameter rolling steel ball 2 in the small-circular ball forced circulation rolling path 10 against the large-diameter rolling steel ball 3 is too strong, frictional resistance increases and frictional heat is generated, and if it is weak, small-diameter rolling steel ball. 2 is not in contact with the large-diameter rolling steel ball 3 and the movable press-type rolling plate 7, and has an influence when the small-diameter rolling steel ball 2 is rolling uphill. In consideration of the elasticity, thickness, shape, etc. of the rubber elastic body 14 in advance so as to obtain the required elastic pressing force, the optimum rubber elastic body 14 is selected and used.

When the small diameter rolling steel ball 2 rolls in close contact with the elastic pressing force of the rubber elastic body 14 on the surface of the movable pressing type rolling plate 7, the surface of the movable pressing type rolling plate 7 is polished. If it exists, the small diameter rolling steel ball 2 is easy to slide. When the surface of the movable pressing type rolling plate 7 is finished in a rough and rough state, it becomes difficult to slip.

  FIG. 6 shows a case where a rubber elastic body 14 is used as the elastic body 8 and the small-diameter rolling steel ball 2 is not yet transferred into the small-diameter forced circulation rolling path 10. FIG. 3 is a longitudinal half sectional view of a rolling ball seismic isolation bearing showing a small-diameter ball forced circulation rolling path structure A provided with an elastic pressing adjuster 15.

  In FIG. 6, a plurality of push rods 16 are arranged on the back side of the movable pressing type rolling plate 7 with the rubber elastic body 14 interposed, and one end side is fixed, and the outer shell plate 6 is freely connected to the other end side. It is made to penetrate to the outside and protrudes to the outside, and the push rod 16 end is used as an elastic pressing adjuster 15 having a screw structure 17, and the screw structure 17 is adjusted from the outside of the outer shell plate 6 so that the elastic pressing force can be adjusted.

At this time, the elastic pressing force of the rubber elastic body 14 has an elastic pressing force slightly stronger than the required elastic pressing force. A strong elastic pressing force is adjusted by the screw structure 17 of the elastic pressing adjuster 15 to obtain a required elastic pressing force. Furthermore, if an elastic body 8 such as a steel coil spring is provided on the screw structure 17 side so that the strength of the elastic pressing force can be adjusted, the elastic pressing force can be further finely adjusted. Trouble can be prevented. Since the arc-shaped forced circulation cover 5 is vertically divided into a plurality of sheets and can be easily attached and detached, some of the arc-shaped forced circulation cover 5 can be detached and the elastic pressing force can be adjusted while visually observing. It is.

  When the mounting base 18 provided integrally with the bowl-shaped load receiving rolling base 1 is screwed to the base 19 side and the dish-like rolling board 20 is screwed to the base 21 side of the seismic isolation object, In order to obtain the effect of preventing foreign matter from entering the cylindrical rolling board 20, it is recommended that the dish-like rolling board 20 is screwed to the base 21 side of the seismic isolation object. In this case, the small-diameter rolling steel ball 2 is pressed against the large-diameter rolling steel ball 3 by pressing the small-diameter ball forced circulation rolling path through the movable pressing-type rolling plate 7 with the elastic pressing force of the elastic body 8 during earthquake motion. 2 is forcibly self-rolling in any direction on the movable pressing type rolling plate 7 in response to the rolling force of the large-diameter rolling steel ball 3, so that the dish-shaped rolling table 20 is a base 21 of the seismic isolation object. There is no problem even if it is screwed to the side. Of course, the dish-shaped rolling board 20 can be screwed to the base 19 side and used.

FIG. 7 is a longitudinal sectional view of the rolling ball base isolation bearing showing the configuration of the small-diameter circular circuit structure B of the rolling ball base isolation bearing embodying the present invention. In the figure, a straight arrow indicates a moving direction, and an arc arrow indicates a rotating direction.

  In FIG. 7, a large-diameter rolling steel is formed on a rolling semi-isolated and uphill roadbed 22 of a concave hemispherical shape having an open top and a small diameter rolling steel ball 2, which is made of an iron material having a strength capable of supporting the seismic isolation object. The ball 3 is placed between the large-diameter rolling steel ball 3 and the lower hemisphere of the large-diameter rolling steel ball 3 with a number of small-diameter rolling steel balls 2 interposed therebetween, and the horizontal center line height of the placed large-diameter rolling steel ball 3 is set. The rolling base isolation and climbing slope roadbed 22 is provided with a substantially equal height of the entire circumference 4 of the roadbed edge.

An arcuate circulation path cover plate 23 that is vertically divided into a plurality of pieces is attached to the circumferential edge 4 of the road base end, and a steel ball holding and circulation board 9 is attached to one end edge of the circulation path cover plate 23 and screwed (not shown). And provided to cover the majority of the large-diameter rolling steel ball 3 in a shape in which a part of the large-diameter rolling steel ball 3 protrudes from the steel ball holding / circulating edge board 9 and is continuous between the two. Then, a small-diameter ball circulation path 24 having a road width appropriately wider than the diameter of the small-diameter rolling steel ball 2 is formed. The greater the number of divisions of the circulation path cover plate 23, the easier the handling is. However, the circulation passage lid plate 23 may be appropriately divided in consideration of the difficulty of production and economy.

  The steel ball holding / circulating edge board 9 holds the large-diameter rolling steel ball 3 and the small-diameter rolling steel ball 2 to prevent separation from the current position, and circulates to induce the small-diameter rolling steel ball 2 during rolling. Also used as an edge.

The circulation path cover plate 23 is formed by selecting from light metals such as aluminum, iron materials, etc., and has strength to hold the small-diameter rolling steel ball 2 and the large-diameter rolling steel ball 3 at the current position due to an unexpected shear force during earthquake motion. The attached steel ball holding / circulating edge board 9 must have a strength required to hold the small diameter rolling steel ball 2 and the large diameter rolling steel ball 3 at all times.

The connecting edge plate 11 is provided on the other end edge of the circulation road cover plate 23, and the connecting edge plate 11 is also provided on the road base end circumferential edge 4 of the rolling seismic isolation and ascending slope road base 22. A plurality of small-diameter rolling steel balls 2 are inserted into the formed small-diameter ball circulation path 24, and an interconnecting plate 13 is provided on the edge side of the circulation path lid plate 23 provided with a steel ball holding and circulation edge board 9, The respective interconnecting plates 13 are screwed together (not shown) to form an integral circulation path cover plate 23 to form a small-diameter spherical circulation path structure B of a rolling ball seismic isolation bearing.

A large number of small-diameter rolling steel balls 2 interposed between the concave hemispherical rolling isolation and climbing roadbed 22 and the large-diameter rolling steel balls 3 and small-diameter rolling steel balls 2 inserted into the small-diameter circulation circuit 24. The total amount of
The concave hemispherical rolling isolation and climbing roadway base 22 and the large diameter rolling steel ball 3 are filled with each other, and the small diameter rolling steel ball 2 is placed in the small diameter spherical circuit 24 during the earthquake motion. The small-diameter rolling steel ball 2 circulates continuously between both the roadbed 22 and the small-diameter ball circulation path 24 without fail, and the small-diameter rolling steel ball 2 reliably falls between the rolling-isolated and uphill roadbed 22 and the large-diameter rolling steel ball 3. Insert the quantity that allows seismic isolation rolling.

The small-diameter rolling steel ball 2 in the small-diameter ball circulation path 24 having a road width that is appropriately wider than the diameter of the small-diameter rolling steel ball 2 is the rotational direction action of the upper hemisphere of the large-diameter rolling steel ball 3 and the subsequent small-diameter rolling steel ball 2. It moves by confusion between rolling and sliding due to the rear pushing force, and falls into the rolling seismic isolation and uphill road bed 22 on the side opposite to the rolling direction of the large-diameter rolling steel ball 3 to perform seismic isolation rolling.

  Therefore, it suffices to insert the minimum amount that can be continuously circulated and can be segregated without rolling between the rolling seismic isolation and ascending slope roadbed 22 and the small-diameter circuit 24, The smaller the number of small-diameter rolling steel balls 2 existing in the small-diameter ball circulation path 24, the less the burden of the rear pressing force of the succeeding small-diameter rolling steel balls 2 is.

  The base surface of the rolling base isolation and climbing slope base plate 22 and the inner surface of the circulating road cover plate 23 from a position about 45 degrees lower than the circumferential edge 4 height of the road base edge of the rolling base isolation and climbing slope base plate 22. When the surface is finished to a rough surface, the small-diameter rolling steel ball 2 that rolls up and down becomes difficult to slip and is easy to roll.

A mounting base 18 provided integrally with the rolling seismic isolation and uphill roadbed 22 is installed on the foundation 19 side. A small rolling circuit structure B of a rolling ball seismic isolation bearing is used by installing a plate-shaped rolling table 20 placed on the top of the large diameter rolling steel ball 3 on the base 21 side of the seismic isolation object.

It is a longitudinal cross-sectional view of a rolling ball seismic isolation bearing showing a small-diameter forced circulation rolling path structure A. It is a cutaway view of the CC section of FIG. It is a partially cutaway front view of a rolling ball seismic isolation bearing with some arc-shaped forced circulation cover 5 removed. It is a vertical half sectional view of a rolling ball seismic isolation bearing showing a small-diameter forced circulation rolling path structure A for explaining the protruding state of the movable pressing type rolling plate 7. It is a longitudinal half sectional view of a rolling ball seismic isolation bearing showing a small-diameter ball forced circulation rolling path structure A showing a contracted state of the movable pressing type rolling plate 7. It is a longitudinal half sectional view of a rolling ball seismic isolation bearing showing a small-diameter ball forced circulation rolling path structure A provided with an elastic pressing adjuster 15. It is a longitudinal cross-sectional view of a rolling ball seismic isolation bearing showing a small-diameter ball circulation path structure B.

Explanation of symbols

A Small ball forced circulation rolling path structure
B small-diameter ball circulation path structure 1 bowl-shaped load receiving roadbed 2 small-diameter rolling steel ball 3 large-diameter rolling steel ball 4 full circle edge of roadbed end 5 forced circulation cover 6 outer shell plate 7 movable press-type rolling plate 8 elastic body 9 steel Ball holding and circulation edge board 10 Small-diameter ball forced circulation rolling path 11 Connection edge plate 12 Naked child 13 Interconnection plate 14 Rubber elastic body 15 Elastic pressure adjusting tool 16 Push rod 17 Screw structure 18 Mounting base 19 Base 20 Dish-shaped rolling board 21 Base of seismic isolation object 22 Rolling isolation and climbing roadbed 23 Circulation path cover plate 24 Small-diameter spherical circulation path 25 Road width retention mechanism

Claims (5)

  A large number of small diameter rolling steel balls are interposed between the small diameter rolling steel ball saddle load bearing roadbed and the large diameter rolling steel ball. In addition, an arc-shaped forced circulation cover that is vertically divided into a plurality of sheets is formed between the two layers of the outer shell plate and the movable pressing type rolling plate with an elastic body having the necessary elastic pressing force interposed therebetween, A steel ball holding and circulation edge is attached and screwed to one end of the outer shell plate, and the forced circulation cover is large in a shape in which a part of a large diameter rolling steel ball protrudes from the steel ball holding and circulation edge. It is provided so as to cover the majority of the rolling steel balls, and a continuous small-diameter ball circulation circulation path is formed between the two, and a connecting edge plate is formed on the other end edge of the outer shell plate, A large number of small-diameter rolling steel balls are inserted into the small-circular ball forced circulation rolling path formed by covering and forming the connecting edge plates on the periphery of the roadbed end circle. A rolling ball is provided by providing an interconnecting plate on the edge side of the outer shell plate with a steel ball holding / circulating edge board, and screwing the interconnecting plates together to form an integral forced circulation cover. Small ball forced circulation rolling path structure of seismic support.   The elastic body that forms an arc-shaped forced circulation cover and is interposed between the two layers of the outer shell plate and the movable pressing type rolling plate is a rubber elastic body, and the outer shell plate and the movable pressing member using a room temperature adhesive. 2. The small-diameter ball forced circulation rolling path structure of a rolling ball seismic isolation bearing according to claim 1, wherein both sides are bonded to a type rolling plate.   An elastic body interposed between the two layers of the outer shell plate and the movable pressing type rolling plate, which forms an arc-shaped forced circulation cover, has a rubber elastic body between the two layers of the outer shell plate and the movable pressing type rolling plate. 2. The small-sphere forced circulation rolling path structure of a rolling ball seismic isolation bearing according to claim 1, wherein the rolling ball is isolated and applied by applying an adhesive on both sides and applying pressure and heat.   An elastic body interposed between the two layers of the outer shell plate and the movable pressing type rolling plate, which forms an arc-shaped forced circulation cover, is provided on the back side of the movable pressing type rolling plate with the elastic body interposed therebetween. The rolling ball seismic isolation device according to claim 1, further comprising an elastic pressing adjuster having one end side of the push rod fixed, the other end side freely penetrating the outer shell plate and protruding to the outside, and the push rod end having a screw structure. Bearing small-diameter forced circulation rolling path structure. A large number of small diameter rolling steel balls are placed on the upper open concave hemispherical rolling isolation and climbing roadbed, between the large diameter rolling steel balls and the lower hemisphere of the large diameter rolling steel balls. Mounted with steel balls interposed, the horizontal center line height of the mounted large-diameter rolling steel balls is almost aligned with the height of the road base edge circle circumference of the rolling base isolation and climbing roadbed, An arc-shaped circulation path cover plate that is vertically divided into a sheet is installed by screwing a steel ball holding / circulation edge plate to one end edge of the circulation path cover plate, and a large-diameter rolling steel from the steel ball holding / circulation edge plate. Provided to cover the majority of large diameter rolling steel balls with a shape that protrudes a part of the sphere, forming a small diameter spherical circulation path with a width wider than the diameter of the small diameter rolling steel balls, continuous between the two A small diameter that is formed by connecting a connecting edge plate to the other edge of the circulation road cover plate, and also providing a connecting edge plate on the periphery of the road base end of the rolling base isolation and climbing road base, screwing both sides, and covering A large number of rolling steel balls with small diameters are inserted into the circulation path, and an interconnection plate is provided on the edge of the circulation path cover plate with a steel ball holding and circulation edge plate, and the interconnection plates are screwed together. A small-diameter ball circulation path structure with a rolling ball seismic isolation bearing, which is formed on an integrated circulation path lid plate.

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