JP6296498B2 - Seismic isolation method for automatic warehouse racks - Google Patents

Description

  The present invention relates to an automatic warehouse rack seismic isolation method for isolating an existing unit type automatic warehouse rack or the like in which a building and a rack are separated.

  In general, many automatic warehouse racks for loading and unloading luggage with a stacker crane have a large tower ratio in order to secure a large amount of storage in a small area. As a result, at the time of an earthquake, damage such as falling of stored items from the upper part of the rack is likely to occur.

  Therefore, in order to reduce the response of the rack at the time of an earthquake and prevent the containment from falling, anti-seismic measures and seismic isolation measures are taken. As the above-mentioned seismic control measures, there are a method of installing a tuned mass damper (TMD) at the top of the rack and a method of connecting between racks or between a rack and a building with a damper. It is relatively easy to introduce.

  However, the above-mentioned seismic control measures have a problem that it is difficult to suppress the response of the upper part of the rack within a predetermined range for a strong earthquake such as seismic intensity 6 or seismic intensity 7.

  On the other hand, according to the above seismic isolation measures, it is possible to reduce the response at the upper part of the rack to almost the same as the response at the lower part of the rack. Documents 1 and 2 propose a configuration in which an entire automatic warehouse including a stacker crane and a rack is constructed on a floor slab or beam that has been subjected to seismic isolation so that the entire system is seismic isolated.

  However, if the structure for seismic isolation of the entire automated warehouse is to be applied to seismic isolation of the existing automated warehouse, the entire foundation of the existing automated warehouse is excavated and newly constructed under the existing floor. After constructing the foundation slab, etc., it was necessary to make the existing floors seismic isolation.

Japanese Patent No.3077571 Japanese Patent No. 3031887

  The present invention has been made in view of the above circumstances, and by making only existing racks of automatic warehouses seismic isolation, the construction is easy and the response of the racks can be reduced by reducing the response of the racks during an earthquake. It is an object of the present invention to provide a method for seismic isolation of an automatic warehouse rack that can greatly reduce damage caused by falling or the like.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a stacker crane that is movably provided on a floor surface of a warehouse, and a rack that is disposed along the traveling direction of the stacker crane. A method for isolating the rack of an automatic warehouse, the height between the lower portions of a plurality of support columns of the rack disposed in a direction orthogonal to the traveling direction and capable of interposing a seismic isolation device After the first new beam is horizontally mounted at the position, the plurality of columns are integrally connected, and after the seismic isolation device is installed between the first new beam and the floor surface, A plurality of columns are cut between the first newly installed beam and the floor surface, and the weight of the rack is supported by the seismic isolation device.

  According to a second aspect of the present invention, in the first aspect of the present invention, a horizontal brace is installed between the first new beams adjacent in the traveling direction, and the first new beams are integrated. It is characterized by this.

  Furthermore, the invention according to claim 3 is the invention according to claim 1 or 2, wherein the second new beam is installed horizontally between the lower portions of the plurality of columns of the rack arranged in the traveling direction. Then, the plurality of support columns are integrally connected in the traveling direction.

In an automatic warehouse rack, the stacker crane has a longitudinal direction in the traveling direction and a short direction in the direction perpendicular to the traveling direction, and therefore tends to swing greatly toward the stacker crane side during an earthquake. .
In the invention according to any one of claims 1 to 3, the first new beam is horizontally connected between the lower portions of the plurality of columns in the short direction of the rack, and is integrally connected and reinforced. Since the seismic isolation device is installed between the first new beam and the floor, and the weight of the rack is supported by the seismic isolation device by cutting a plurality of columns, the existing automatic warehouse However, the simple construction can reduce the response of the rack at the time of an earthquake and greatly reduce the damage caused by the fall of the containment.

  At this time, when the rigidity between the struts adjacent to the traveling direction (longitudinal direction) of the stacker crane is low as in the existing unit type automatic warehouse rack, It is preferable that a horizontal brace is installed between the first new beams adjacent in the longitudinal direction, and the first new beams adjacent to each other are integrated.

  Furthermore, when it is necessary to perform seismic isolation in two horizontal directions in which the longitudinal direction is added to the short direction, as in the invention according to claim 3, a plurality of support columns of the rack are also provided in the longitudinal direction. It is possible to easily cope with this problem by laying the second newly installed beam horizontally between the lower parts of the rack 1 and forming a strong frame body with the first and second newly installed beams at the lower part of the rack 1.

It is a figure for demonstrating one Embodiment of this invention, and is a top view which shows the state which laid the 1st newly installed beam horizontally on the support | pillar lower part of the transversal direction of a rack. It is a front view of FIG. It is a side view of FIG. It is a front view which shows the state which installed the seismic isolation apparatus between the 1st newly installed beam of FIG. 2, and a floor surface. FIG. 5 is a side view of FIG. 4. It is a front view which shows the state which cut | disconnected the lower part of the pillar of FIG. FIG. 7 is a side view of FIG. 6. It is a figure for demonstrating other embodiment of this invention, and is a top view which shows the state which carried out the 2nd newly installed beam horizontally in the longitudinal direction of the rack of FIG. It is a front view of FIG. It is a side view of FIG.

Hereinafter, an embodiment of a seismic isolation method for an automatic warehouse rack according to the present invention will be described with reference to the drawings.
First, the configuration of the rack 1 of the automatic warehouse will be described with reference to FIGS. 1 to 3. A stacker crane (not shown) of the rack 1 in FIG. In FIG. 2, it is provided so as to be able to run in the vertical direction on the left and right, in FIG.

  In FIG. 2, the left rack 1 is loaded and unloaded from the stacker crane disposed on the left side in a direction orthogonal to the traveling direction, and the right rack 1 is disposed on the right side of the stacker crane. A load is taken in and out from the crane, and supports 2a and 2b are erected on the front side and the rear side in the load and take-out direction, respectively.

  In addition, the support columns 2a and 2b of the rack 1 are connected by the lattice brace 3 and the arms 4 and are arranged at a predetermined interval in the traveling direction of the stacker crane (longitudinal direction of the rack 1). Furthermore, these adjacent support | pillars 2a and 2b are connected by the horizontal material and the horizontal brace in the mutual intermediate part and the top part.

  In order to make the rack 1 having the above configuration seismic isolation, as shown in FIGS. 1 to 3, the support column 2 a of the rack 1 adjacent to the direction (short direction of the rack 1) orthogonal to the traveling direction of the stacker crane. 2b, the first new beam 5 is placed horizontally. Specifically, the first new beam 5 made of a pair of channel steels is arranged at a height where a seismic isolation device 7 to be described later can be interposed between the lower flange 5b and the floor surface F. Then, the struts 2a and 2b are sandwiched between the webs 5a, and are integrated by tightening or welding the high-strength bolts 6.

As a result, the lower portions of the columns 2a and 2b of the two racks 1 are integrally connected by the pair of first new beams 5 and the high-strength bolts 6 in the short direction.
Next, a pair of horizontal braces 8 are installed in a crossing manner between the first new beams 5 adjacent to each other in the traveling direction, and these first new beams are integrated.

  Next, as shown in FIGS. 4 and 5, the seismic isolation device 7 is inserted between the flange 5b below the first newly installed beam 5 and the floor surface F, and the upper surface and the lower surface thereof are respectively connected to the flange 5b and the floor. Bolt to surface F. As this seismic isolation device 7, high damping laminated rubber, laminated rubber with a lead plug, a sliding bearing or a rolling bearing can be used. If necessary, a nut for bolting the lower surface of the seismic isolation device 7 is embedded in a predetermined position on the floor surface F in advance.

  Furthermore, in order to suppress deformation in the seismic isolation layer, a damper 9 is installed between the flange 5b of the first new beam 5 and the floor surface F as necessary. At this time, usually in this type of automatic warehouse, it is preferable to keep the relative displacement between the rack 1 and the floor surface F within 20 cm at the time of an earthquake, so that the damping force in the damper 9 is less than that of a general building. Set a value larger than the damping force in the earthquake. Note that the damper 9 can be omitted when a predetermined damping performance is obtained by the first seismic isolation device 7 and the deformation of the seismic isolation layer falls within a predetermined range.

  After the installation of the seismic isolation device 7 and, if necessary, the damper 9 is completed in this way, as shown in FIGS. 6 and 7, all the columns 2 a and 2 b of the rack 1 are connected to the first new beam 5. By cutting at a position 10 between the flange 5b and the floor surface F and supporting the weight of the rack 1 on the floor surface F by the seismic isolation device 7 through the first new beam 5, an existing automatic warehouse The seismic isolation of rack 1 is completed.

  When it is necessary to make the rack 1 seismically isolated in two horizontal directions with the longitudinal direction added to the short direction, the first new installation is provided as in other embodiments shown in FIGS. In parallel with the addition of the beam 5 and the horizontal brace 8, also in the longitudinal direction of the rack 1, a second newly installed beam 11 made of, for example, a grooved steel is horizontally mounted between the lower portions of the plurality of columns 2a. By connecting to the lower part of the rack 1, a strong frame constituted by the first and second newly installed beams 5, 11 and the horizontal brace 8 is formed.

  As described above, according to the seismic isolation method for the automatic warehouse rack, the first new beam 5 is horizontally mounted between the lower portions of the plurality of columns 2a, 2b in the short direction of the rack 1, and A horizontal brace 8 is erected between the first new beams 5 to be integrally connected and reinforced, and the seismic isolation device 7 is installed between the first new beams 5 and the floor F, and the column 2a. Since the weight of the rack 1 is supported by the seismic isolation device 7 by cutting 2b, the rack 1 can reduce the response of the rack 1 at the time of earthquake by simple construction even for existing automatic warehouses. The damage caused by the fall of the can can be greatly reduced.

  Furthermore, when it is necessary to perform seismic isolation in the two horizontal directions with the longitudinal direction added to the short direction, as in the other embodiments shown in FIGS. The second newly installed beam 11 is horizontally mounted between the lower portions of one support column 2a, and a strong frame body constituted by the first and second newly installed beams 5, 11 and the horizontal brace 8 is provided at the lower portion of the rack 1. By forming, it can cope easily.

DESCRIPTION OF SYMBOLS 1 Rack 2a, 2b Post 5 First new beam 7 Seismic isolation device 8 Horizontal brace 10 Post cutting position 11 Second new beam F Floor

Claims (3)

A method of seismically isolating the rack of an automatic warehouse comprising a stacker crane provided movably on the floor of a warehouse and a rack disposed along the traveling direction of the stacker crane,
By laying the first new beam horizontally between the lower portions of the plurality of columns of the rack arranged in the direction orthogonal to the traveling direction and at a height where the seismic isolation device can be interposed After connecting a plurality of columns integrally and installing the seismic isolation device between the first new beam and the floor surface, the plurality of columns are connected to the first new beam and the floor surface. And the weight of the rack is supported by the seismic isolation device.   2. The method for seismic isolation of an automatic warehouse rack according to claim 1, wherein a horizontal brace is installed between the first new beams adjacent in the traveling direction, and the first new beams are integrated.   The plurality of support columns are integrally connected in the travel direction by horizontally extending a second new beam between the lower portions of the support columns of the rack disposed in the travel direction. The method for seismic isolation of an automatic warehouse rack according to claim 1 or 2.

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