JP2009281556A - Cargo supporting base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously expect the excellent base isolation effect over a long period, by unitizing a cargo supporting base isolation device effectively in enhancing earthquake resistance of a cargo support table for supporting a cargo in a cargo storage division of a rack. <P>SOLUTION: This cargo supporting base isolation device is composed of a support column body 16 erected on support members 7a and 7b, a movable body 17 put on this support column body 16 and slidably supported on an upper surface of the support column body 16, and an energizing member 19 interposed between an annular peripheral wall 18 arranged in this movable body 17 and the support column body 16 and energizing and holding the movable body 17 to and in a substantially concentric position to the support column body 16. An upper end support surface 16b of the support column body 16 is formed as a convex spherical surface, and a lower side support object surface 17b of the movable body 17 abutting on the upper end support surface 16b of this support column body 16, is formed as a concave spherical surface larger than a radius of the convex spherical surface for forming the upper end support surface 16b of the support column body 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a load-supporting seismic isolation device used as a load-supporting base such as a load-storage rack or as a supporting means for a load-supporting base.

The seismic isolation device for load support used as a support means for a load support platform such as a load storage rack is designed so that the load being stored is placed on the load support platform when the rack swings in the direction before and after loading / unloading of the load storage section. Is used to prevent an accident from falling to the path side of the rack (the side having the traveling path of the loading / unloading crane provided along the rack). A load supporting base that supports the load in the load storage section and a support member that protrudes from the bulkhead frames on the left and right sides of the load storage section and supports the load support base. A support column that also serves as a base or supports a movable body that supports the load support base in a slidable manner in a horizontal direction, and a biasing member that biases and holds the movable body at a substantially central position of the sliding region. Composed. Thus, in this conventional seismic isolation device for load support, as described in Patent Document 1, the support column body and the urging member are arranged in parallel at a distant position on the support member. Because it was not unitized as a seismic isolation device, it not only took time to mount the support member on the support member, but it also resisted the urging force of the movable body in all horizontal directions around the support column. And could not be supported slidably. Therefore, as shown in Non-Patent Document 1, the movable body is formed in a disk shape that covers the support column body and is slidably supported in all horizontal directions, and an annular peripheral wall that surrounds the support column body of the movable body; A unitized seismic isolation device has been conceived in which an urging member such as a spiral spring is interposed between the support column and the support column.
JP 2008-51238 A Japanese Patent Application No. 2006-318076

  In the configuration described in Non-Patent Document 1, since the large-diameter movable body is supported by the small-diameter support column body and the peripheral portion of the movable body is greatly projected from the support column body, When a load is loaded on a supported load support table or a load support table that is also used as a movable body of the seismic isolation device, the bottom surface of the load when it is lowered is not completely horizontal but inclined. For this reason, there is a possibility that one peripheral portion of the movable body is pushed down by a load and the movable body is inclined with respect to the support column. In such a case, one peripheral edge of the upper end support surface of the small-diameter support column body bites into the lower supported surface of the large-diameter movable body and is damaged. Such damage on the lower supported surface of the movable body becomes a factor that hinders smooth horizontal relative movement between the support column and the movable body, and the expected seismic isolation effect cannot be expected.

  The object of the present invention is to provide a load-supporting seismic isolation device that can solve the above-mentioned conventional problems, and the seismic isolation device according to claim 1 is an embodiment described later. When indicated by a reference numeral, the support column 16 standing on the support members 7a and 7b and the upper support surface 25a of the support column 16 is slidably supported on the support column 16 The movable body 17 is interposed between the support pillar body 16 and the annular peripheral wall 18 provided on the movable body 17 and the support column body 16 to urge the movable body 17 to a substantially concentric position. In the load-supporting seismic isolation device including the urging member 19 that is held, the upper end support surface 16b of the support column 16 is formed into a convex spherical surface, and the movable body is in contact with the upper end support surface 16b of the support column 16 17 is a lower supported surface 17b of the upper support surface of the support column 16. It has a formed structure on a concave spherical surface larger than the radius of the convex spherical surface forming the 6b.

  When the seismic isolation device according to the present invention is implemented, the lower supported surface 17b of the movable body 17 can be formed by processing the lower side surface of the movable body 17 into a concave spherical surface. As described in Item 2, the lower supported surface 17b can be formed on the lower surface of the slide plate 28 stretched on the lower surface of the movable body 17.

  According to a third aspect of the present invention, the support column 16 includes a metal column main body 16a fixed on the support members 7a and 7b and a synthetic resin presser attached to the upper end of the column main body 16a. A small-diameter step portion 22 is formed on the upper end of the column main body 16a, and a ring-shaped cushioning material 23 that protrudes from the column main body 16a is fitted around the upper-end small-diameter step portion 22 of the column main body 16a. The presser plate 25 is configured such that its periphery covers the ring-shaped cushioning material 23 and fixes the ring-shaped cushioning material 23, and its upper surface forms the upper end supported surface 16 b of the support column 16. be able to.

  Furthermore, as described in claim 4, the upper end support surface 16b of the support column 16 can be made of synthetic resin, and the lower supported surface 17b of the movable body 17 can be made of metal.

  The seismic isolation device for load support according to the present invention includes, for example, a load support base disposed in each load storage section of a load storage rack, and partition walls on both left and right sides of the load storage section so as to support the load support base. Or the movable body itself of the seismic isolation device of the present invention disposed on the support member can be used as a load support base. When the rack swings in the forward / backward direction of loading / unloading of the load storage section when an earthquake occurs, an urging member is attached between the support column on the support member side that swings back and forth integrally with the rack and the movable body on the load support side. Relative sliding movement occurs against the force, and the movable body on the side supporting the load does not swing in the front-rear direction at the same speed and the same amplitude as the rack.

  Therefore, when the rack swings to the open passage side, the load swings to the passage side integrally with the rack via the movable body, so that the load slides on the load support base due to inertia to the passage side. There is no risk of falling to the aisle side, and the desired seismic isolation effect is obtained. Since the relative movement in the front-rear direction between the support column on the support member side and the movable body on the load support side is performed against the elasticity of the biasing member, the biasing member is moved after the relative movement. By returning elastically, the movable body that supports the load automatically returns to the origin position on the support member.Therefore, unless the load slides on the load support base, the position of the load will not change unexpectedly in the front-rear direction. The load can be safely and continuously stored. Of course, since the movable body is slidably supported in all horizontal directions with respect to the support column, a seismic isolation effect can be expected even when the rack swings in the horizontal and horizontal directions or in an oblique direction. The fear of falling off the support base and causing cargo collapse is also eliminated. Furthermore, an urging member is interposed between the support column and the movable body covering it, and the installation of the seismic isolation device is completed simply by mounting the support column on the support member. Can be done easily and easily, and the assembly cost can be reduced.

  Thus, according to the configuration of the present invention as set forth in claim 1, the upper support surface of the support column is formed into a convex spherical surface, and the lower cover of the movable member contacting the upper support surface of the support column is formed. Since the support surface is configured to be a concave spherical surface larger than the radius of the convex spherical surface forming the upper end support surface of the support column body, the upper end support surface of the support column body and the lower supported surface of the movable body The contact is always tangential contact regardless of the horizontal relative movement of the movable body relative to the support column and the tilt of the movable body relative to the support column, and one edge of the upper end support surface of the small-diameter support column is movable with a large diameter. There is no risk of damaging the lower supported surface of the body. Therefore, the horizontal horizontal movement between the support column and the movable body is not hindered by scratches on the lower supported surface of the movable body, so that the desired seismic isolation effect can be ensured for a long time. Can be expected continuously.

  Furthermore, when the support column body and the movable body are moved relative to each other in the horizontal direction from a concentric fixed position, the movable body is pushed up against the downward load against the support column body, and the convex Since the contact between the spherical surface and the concave spherical surface, as the movable body moves away from the support column body in the horizontal direction, the relative movement suppression resistance force acting between the support column body and the movable body increases, and the support column body The restoring force acting between the movable body and the movable body to return the two to a concentric position also increases. Therefore, along with an increase in the amount of relative movement between the movable body and the supporting column body, coupled with an increase in the elastic reaction force in the pushback direction received from the biasing member, the damping effect on the swing is also large. A reliable and effective seismic isolation effect can be obtained.

  In addition, according to the structure of Claim 2, rather than cutting the lower surface of the movable body surrounded by the annular peripheral wall into a concave spherical surface, the lower surface of the slide plate, which is a simple circular plate, is formed into a concave spherical surface. Since it is easier and easier to cut, the manufacturing cost of the device can be reduced as a result, and from the concave spherical surface having the preferred material and properties, regardless of the material of the movable body itself and the properties of the lower surface. The lower supported surface which consists of this can be formed, and the apparatus which can anticipate the expected seismic isolation effect reliably can be comprised easily.

  In addition, by providing a ring-shaped cushioning material that fits around the support column and the periphery projects from the column main body of the support column, the support column and the annular peripheral wall of the movable body can be connected even when the rack is greatly shaken. The ring-shaped cushioning material prevents a direct impact collision, and the impact can be mitigated and the risk of an accident such as a load collapse can be greatly suppressed. According to the configuration described in 3, the ring-shaped cushioning material can be easily and easily attached because only the ring-shaped cushioning material is externally fitted to the upper end small-diameter stepped portion of the column body and the presser plate is attached from above. . Moreover, regardless of the material of the column body of the support column body, the material of the press plate is made a suitable material for the upper end support surface, and the present invention can be easily implemented only by processing the upper surface of the press plate into a convex spherical surface. Can do.

  Furthermore, according to the structure of claim 4, the lower supported surface of the movable body is made of metal, and the upper end support surface of the support column that supports the lower supported surface of the movable body is made of synthetic resin. Therefore, by selecting and configuring a material with a small friction coefficient for the synthetic resin material that forms the support body upper end support surface, the horizontal relative movement between the support column and the movable body is smoothly performed, Thus, the desired seismic isolation effect can be obtained with certainty.

  FIG. 1 shows a part of a rack to which the load supporting apparatus of the present invention is applied. Reference numeral 1 denotes a load storage section arranged in a grid pattern in both the upper, lower, left and right directions. It is delimited by a partition frame 2 standing vertically in the direction, and delimited by a load support device 3 of the present invention in the vertical direction. Each partition frame 2 has a lattice structure in which a pair of front and rear support members 4a and 4b are connected to each other by a connection member 5. On the back side of the load storage compartment 1, the rear support members 4b of each partition frame 2 are On the front side of the load storage section 1, that is, on the traveling passage side of the loading / unloading crane that loads and unloads the load storage section 1, the load is stored in the load storage section 1. It is known that the front strut members 4a of the partition wall frames 2 are connected to each other by a horizontal connecting member (not shown) at a level that does not interfere with taking in and out.

  The load support device 3 disposed at the lower end position of each load storage section 1 includes a pair of left and right support members 7a and 7b attached to the left and right partition walls 2 of the load storage section 1, and each support member 7a and 7b. It consists of a seismic isolation device 8 that also serves as a total of four load support bases arranged at two places on the front and rear.

  Hereinafter, the specific structure will be described. As shown in FIGS. 2 to 4, the pair of left and right support members 7 a, 7 b are parallel to the loading / unloading front-rear direction (X direction) with respect to the load storage section 1 and the front-rear width of the partition frame 2. Is attached to the front end of each arm member 11a, 11b, and the arm members 11a, 11b connected to the front and rear ends of the front direction bar member 10 at right angles outward. Mounting members 12a and 12b. The attachment members 12a and 12b have a height about twice the height of the arm members 11a and 11b. The attachment members 12a and 12b with the arm members 11a and 11b attached to the lower half of the attachment members 12a and 12b are shown in FIG. 2B. As shown in the figure, one bolt 13 and a nut 14 inserted between the mounting holes provided in the column members 4a and 4b in a state of being fitted to the column members 4a and 4b of the partition wall frame 2 from the side, Thus, the column members 4a and 4b are fixed at predetermined height positions. It should be noted that the arm members 11a and 11b are provided with a groove-shaped member, and the concave groove portions thereof are opposed to each other, the longitudinal bar member 10 is formed of an angle member, and one horizontal belt-like plate portion of the arm members 11a and 11b. The other vertical belt-like plate portion is used in such a direction that it overlaps the top surface of the tip and the tips of the arm members 11a and 11b. 3 shown in FIG. 3 is a bolt insertion hole provided in the upper half of the attachment members 12a and 12b.

  The four seismic isolation devices 8 have the same structure respectively disposed in the vicinity of both front and rear ends on the front and rear direction bar-shaped member 10 in each of the support members 7a and 7b, and as shown in FIGS. A support column 16 erected on the bar member 10 in the front-rear direction, a movable body 17 slidably supported by the support column 16 in all horizontal directions, and the movable body so as to surround the support column 16. And an urging member 19 that is interposed between an annular peripheral wall 18 provided on the rim 17 and the support column 16 and urges and holds the movable body 17 at a substantially central position within its sliding range. .

  The specific structure of each seismic isolation device 8 will be described. The support column 16 is a columnar metal column main body 16a, a ring-shaped cushioning material 23 made of an elastic material such as butyl rubber sponge, and a circular synthetic resin. And presser plate 25. The column main body 16a includes a screw hole 20 provided upward from the lower end surface, a small diameter step portion 21 formed on the lower end peripheral surface, and a small diameter step portion 22 formed on the upper end peripheral surface. A ring-shaped cushioning material 23 is externally fitted to the stepped portion 22 from above, and a presser plate 25 is attached to the upper end surface of the support pillar 16 with a plurality of circumferential screws 24 in order to fix the ring-shaped cushioning material 23. The circular upper surface of the presser plate 25 is processed into a convex spherical surface whose center is located at a position sufficiently below the upper surface on the vertical axis of the presser plate 25 to support the movable body 17 slidably. The upper end support surface 16b is configured. Further, the peripheral edge of the upper end support surface 16b of the presser plate 25 and the vertical peripheral side surface of the presser plate 25 are connected via a projecting curved surface so that a sharp corner is not formed. Thus, the support column 16 (the column main body 16a) is inserted into the vertical mounting hole 26 provided in the horizontal belt-like plate portion 10a of the front / rear direction rod-shaped member 10 upward from the lower side. 27 is screwed and fastened to the screw hole 20 so as to be fixed on the horizontal belt-like plate portion 10a of the bar member 10 in the front-rear direction. The ring-shaped cushioning material 23 attached to the column main body 16a has an outer diameter that projects evenly outward in the circumferential direction from the column main body 16a.

  The movable body 17 is made of metal in which the circular annular peripheral wall 18 is integrally connected from the periphery of the circular top plate portion 17a, and an annular recess for receiving a spring is formed on the inner peripheral surface of the annular peripheral wall 18. A groove 30 is formed, and a metal slide plate 28 is attached to the circular lower side surface of the top plate portion 17 a of the movable body 17 by a plurality of circumferentially-directed screws 29 that closes almost the entire area of the circular lower side surface. The lower surface of the slide plate 28 is centered on the vertical axis of the movable body 17 and is sufficiently below the lower surface of the slide plate 28, and the upper end support surface 16b is formed of a convex spherical surface of the support column 16. A lower supported surface 17b made of metal on the movable body 17 side is formed by processing into a concave spherical surface sufficiently larger than the radius of.

  The annular groove 30 provided in the annular peripheral wall 18 of the movable body 17 is a column main body when the movable body 17 (slide plate 28) is supported on the upper end support surface 25a of the support column 16 (presser plate 25). It is provided at a position higher than the lower end small diameter step portion 21 of 16 a and lower than the ring-shaped cushioning material 23. The biasing member 19 includes a spiral spring 31 that is flat in an unloaded state, and the outer diameter of the spiral spring 31 in the unloaded state is that of the annular groove 30 for receiving a spring provided in the annular peripheral wall 18. The diameter is larger than the diameter, and the inner diameter is substantially the same as the diameter of the small diameter step portion 21 of the support column 16.

  As described above, when the support column 16 is fixed on the horizontal belt-like plate portion 10a of the longitudinal bar member 10, the inner peripheral portion 31a of the spiral spring 31 is fitted to the lower end small-diameter step portion 21 of the column main body 16a. In this state, the column main body 16a is fixed on the horizontal belt-like plate portion 10a with a bolt 27. When the movable body 17 is put on the support pillar 16, the outer peripheral portion 31 b of the spiral spring 31 is fitted into the annular groove 30 of the annular peripheral wall 18. That is, by pulling up the outer peripheral portion 31b of the spiral spring 31 with respect to the inner peripheral portion 31a and simultaneously reducing the outer diameter by constricting the spring material in the spiral direction, the outer peripheral portion 31b of the spiral spring 31 is formed into an annular peripheral wall. 18 annular grooves 30 are fitted. As a result, the spiral spring 31 has an axial elastic stress that causes the outer peripheral portion 31b to lower to the level of the inner peripheral portion 31a and an expanded elastic stress that causes the outer peripheral portion 31b to return to the original outer diameter. The movable body 17 is pulled down by the axial center direction elastic stress of the spiral spring 31, and the lower supported surface 17 b made of a circular and concave spherical surface of the top plate portion 17 a serves as the support column 16. The upper end support surface (upper surface of the pressing plate 25) 16b made of a synthetic resin having a circular and convex spherical surface is pressed against the upper end support surface 16b, and the movable body 17 (the annular peripheral wall 18) is supported by the elastic spring stress in the radial direction of the spiral spring 31. It is biased and held at a fixed position that is substantially concentric with the body 16. At this time, because the convex spherical upper end support surface 16b of the support column 16 is in contact with the center position of the concave supported surface 17b of the concave spherical surface of the movable body 17, that is, the position recessed most upward. The support level of the movable body 17 by the support column 16 is the lowest.

  In the above embodiment, the four seismic isolation devices 8 are arranged at positions that can support the four corners of the load W stored in the load storage section 1 and supported by the support members 7a and 7b. The movable body 17 is slidably supported in all horizontal directions by the support pillars 16 on the support members 7a and 7b side, and is urged and held at a substantially central position within the sliding range by the spiral spring 31 (the urging member 19). However, each is configured to also serve as the load support base 32. In other words, the four load support bases 32 are supported by the support members 7a and 7b via the support column 16 and the biasing member 19 (the spiral spring 31) of the seismic isolation device 8, respectively. It is configured.

  According to the above configuration, when a horizontal external force that is strong enough to deform the spiral spring 31 in the horizontal direction acts relatively between the support column 16 and the movable body 17, The movable body 17 is a synthetic resin on the support column body 16 side within the range until the outer peripheral surface of the ring-shaped cushioning material 23 on the support column body 16 side comes into pressure contact with the inner peripheral surface of the annular peripheral wall 18 on the movable body 17 side. Relative movement in all horizontal directions while deforming the spiral spring 31 in the horizontal direction with relative sliding by tangential contact between the upper end support surface 16b made of metal and the lower supported surface 17b made of metal on the movable body 17 side can do. At this time, as the movable body 17 moves away from the support column body 16 in the horizontal direction, the tangential contact position between them moves from the center position of the convex spherical upper end support surface 16b on the support column body 16 side to the peripheral direction. As shown in FIG. 8, when the movable body 17 moves horizontally relative to the support column 16 in any direction to the limit position limited by the ring-shaped cushioning material 23, both The tangential contact position between them does not reach the peripheral edge of the convex spherical upper end support surface 16b on the support column 16 side, and the lower supported surface on the movable column 17 side and the peripheral edge of the upper end support surface 16b on the support column 16 side. The difference between the radius of the convex spherical surface of the upper support surface 16b on the support column 16 side and the radius of the concave spherical surface of the lower supported surface 17b on the movable body 17 side so that a small gap is secured between the surface 17b and the surface 17b. By setting and configuring, the support column body 16 is temporarily Even inclined body 17, the peripheral edge one place of the upper end supporting surface 16b of the support column 16 side never bites into the bottom supported surface 17b of the movable member 17 side.

  Further, when the support column body 16 and the movable body 17 are moved relative to each other in a horizontal direction from a concentric fixed position, the movable body 17 is pushed up against the support column body 16 against a downward load. In addition, since the contact between the convex spherical surface and the concave spherical surface, the unit amount of the horizontal relative movement between the support column body 16 and the movable body 17 as the movable body 17 moves away from the support column body 16 in the horizontal direction. The lift of the movable body 17 with respect to is increased. In other words, as the movable body 17 moves away from the support column body 16 in the horizontal direction, the resistance force for suppressing the relative movement between the two increases, and the movable body 17 is fixed to the support column body 16. The restoring force in the horizontal direction to return to the position also increases. As a result, as the amount of relative movement in the horizontal direction between the support column 16 and the movable body 17 increases, the elastic reaction force in the push-back direction received from the compressed biasing member 19 (spiral spring 31) is increased. Combined with the increase in size, an action of attenuating the relative movement in the horizontal direction between the support column body 16 and the movable body 17 works.

  Therefore, the load W is loaded into the empty load storage section 1 by the loading / unloading crane and loaded in the front-rear direction (X direction), and as shown by a virtual line in FIG. In the load supporting state in which the four corners of the bottom of the pallet (when loaded) are supported on the four load supporting bases 32 (the movable body 17 of the seismic isolation device 8), the rack is, for example, in the load storage section 1 due to an earthquake or the like. Support members 7a and 7b integrated with the rack support the four load support bases 32 (movable bodies 17 of the seismic isolation device 8) that support the load W when they swing in the unloading back and forth direction (X direction). The spiral springs 31 of the seismic isolation devices 8 are oscillated in the same direction while alternately deforming in the opposite direction against the elasticity via the column 16. That is, the load W supported on the four load support bases 32 (the movable body 17 of the seismic isolation device 8) hardly swings if the speed and amplitude of the swing are within the assumed range, or the support members 7a, It will swing with a small amplitude later than the swing of 7b. As described above, between the movable body 17 and the support column body 16 also acts to attenuate the horizontal vibration of the movable body 17 with respect to the support column body 16, and as a result, the desired seismic isolation effect is obtained. can get. Of course, when the swing of the rack is settled, the movable body 17 is pressed by the vertical contact between the convex spherical upper end support surface 16b on the support column 16 side and the concave supported lower surface 17b on the movable body 17 side. The load supporting base 32 (the movable body 17 of the seismic isolation device 8) is restored by the restoring force acting on the movable body 17 to return the movable body 17 to the original fixed position and the elastic restoring force of the spiral spring 31 in the horizontal direction. It is automatically returned to the intended fixed position, that is, substantially concentric with respect to the support column 16. Therefore, unless the load W slides and moves with respect to the load support base 32 (the movable body 17 of the seismic isolation unit 8), the position of the load W in the load storage section 1 does not change.

  Further, due to the presence of the ring-shaped cushioning material 23 incorporated in each seismic isolation device 8, the support column 16 and the annular peripheral wall 18 of the movable body 17 collide with each other in the radial direction vigorously when the rack is greatly shaken. In such a situation, the ring-shaped cushioning material 23 is sandwiched and compressed between the support column 16 and the annular peripheral wall 18 of the movable body 17, absorbs the impact, and the load support base 32 (the seismic isolation device 8). It is possible to prevent the load W from slipping and moving on the load support base 32 (the movable body 17 of the seismic isolation device 8) due to the reaction. Safety can be increased.

  The above-mentioned seismic isolation action causes the movable body 17 to move up and down against the frictional resistance between the upper support surface 16b on the support column 16 side and the lower supported surface 17b on the movable body 17 side. Accordingly, the upper support surface 16b on the support column 16 side is composed of a synthetic resin presser plate 25, and the lower supported surface 17b on the movable body 17 side is made of metal. Therefore, the presser plate 25 constituting the upper end support surface 16b on the support column 16 side is formed of a synthetic resin having a small friction coefficient and is made of metal on the movable body 17 side. By smoothly finishing the lower supported surface 17b, the frictional resistance between the upper support surface 16b on the support column 16 side and the lower supported surface 17b on the movable body 17 side is sufficiently reduced. The expected seismic isolation action can be realized. Of course, although not shown, the lower surface itself of the top plate portion 17a of the metal movable body 17 is processed into a concave spherical surface without using the metal slide plate 28, and the lower supported surface 17b. You can also In some cases, contrary to the above embodiment, a synthetic resin slide plate 28 and a metal presser plate 25 are used, and the upper support surface 16b on the support column 16 side is made of metal, so that the movable body The lower supported surface 17b on the 17 side can be made of synthetic resin, and both the upper support surface 16b on the support column 16 side and the lower supported surface 17b on the movable body 17 side are made of synthetic resin or metal. It is also possible to make it.

  The configuration of the support members 7a and 7b is not limited to that of the above embodiment. For example, as shown in FIG. 9, the arm members 11a and 11b are attached to the mounting members 12a so that the distal ends thereof are positioned directly below the seismic isolation devices 8 arranged at positions where the bottom corners of the load W can be supported. 12b can be extended horizontally inward, and the seismic isolation device 8 (support column 16) can be directly mounted on the tip of the arm members 11a, 11b, thereby omitting the longitudinal bar 10. In this case, as shown in the figure, the arm members 11a and 11b are fixed to the short members 33 projecting from the mounting members 12a and 12b at right angles and laterally, and the length is fixedly extended inward from the front end of the short members 33 in a horizontal oblique direction. However, the arm members 11a and 11b made of a single member may be directly fixed to the mounting members 12a and 12b so as to extend horizontally inward.

  Furthermore, in the above embodiment, the movable body 17 of each seismic isolation device 8 is also used as the load support base 32 as it is, but as shown in the phantom line of FIG. 9 and FIG. 10, the seismic isolation device 8 of the present invention. Can also be used as means for supporting both front and rear end portions of a pair of left and right load support bases 35 formed of front and rear direction members arranged in parallel on the left and right sides of the load storage section 1. In the figure, the support members 7a and 7b include support members 7a and 7b composed of only a pair of front and rear arm members 11a and 11b that individually support the pair of front and rear seismic isolation devices 8, respectively. As shown, the support members 7a and 7b may be configured to support the front-rear bar-shaped member 10 that supports the pair of front and rear seismic isolation devices 8 at two front and rear positions by the pair of front and rear arm members 11a and 11b.

Fig. A is a transverse plan view showing a part of a load storage rack, and Fig. B is a front view of the same portion. A figure is a top view which shows the load support apparatus provided in one load storage division, B figure is the A section enlarged view of A figure. It is a front view of a load support apparatus. It is the XX sectional view taken on the line of FIG. Fig. A is a longitudinal front view showing the seismic isolation device, and Fig. B is an exploded longitudinal front view of the seismic isolation device. FIG. It is a vertical side view which shows the modification of the movable body of a seismic isolation apparatus. It is a vertical front view which shows the operation state of a seismic isolation apparatus. It is a top view which shows the one side of the load support apparatus in 2nd embodiment. It is a side view which shows the one side of the load support apparatus in 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Load storage section 2 Bulkhead frame 3 Load support apparatus 4a, 4b Support | pillar member 5,6 Connection member 7a, 7b Support member 8 Seismic isolation apparatus 9 Load support stand (whole)
10 Bar members 11a and 11b in the front-rear direction Arm members 12a and 12b Attachment member 16 Support column 16a Column body 16b Convex spherical upper end support surface of the column body (upper surface of the pressing plate)
17 Movable body (load support base 32)
17a Top plate portion 17b of movable body Lower supported surface of concave spherical surface of movable body (lower surface of slide plate)
18 Annular peripheral wall 19 of movable body Biasing members 21, 22 Small-diameter stepped portion 23 of support column body Ring-shaped cushioning material 25 Presser plate 28 made of synthetic resin Metal slide plate 30 Annular groove 31 Spiral spring (biasing member)
32 Load support base (movable body 17 of seismic isolation device)
35 Load support base composed of longitudinal members

Claims (4)

  A support column erected on the support member; a movable body which is slidably supported on the upper support surface of the support column body; and an annular peripheral wall provided on the movable body. A load supporting seismic isolation device comprising a biasing member interposed between the support column and biasing and holding the movable body at a substantially concentric position with respect to the support column. A concave surface that has a support surface formed into a convex spherical surface, and the lower supported surface of the movable body that contacts the upper end support surface of the support column is larger than the radius of the convex spherical surface that forms the upper end support surface of the support column A seismic isolation device for load support.   The seismic isolation device for load support according to claim 1, wherein the lower supported surface of the movable body is formed by a lower surface of a slide plate stretched on a lower surface of the movable body.   The support column body is composed of a metal column main body fixed on the support member and a press plate attached to the upper end of the column main body, and a small-diameter step portion is formed on the upper end of the column main body. A ring-shaped cushioning material that protrudes from the main body of the support column is externally fitted to the upper-end small-diameter step portion, and the presser plate covers the periphery of the ring-shaped cushioning material to fix the ring-shaped cushioning material and its upper surface. The seismic isolation device for load support according to claim 1 or 2, wherein an upper end supported surface of the support column is formed.   The seismic isolation for load support according to any one of claims 1 to 3, wherein an upper end support surface of the support pillar is formed of a synthetic resin, and a lower supported surface of the movable body is formed of a metal. apparatus.

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