JP2015081164A - Seismic control structure of rack shelf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the seismic control structure of a rack shelf capable of controlling preferably earthquake motions.SOLUTION: In a rack shelf 3, a plurality of a pair of racks 9 which is connected by a beam 15 across a space 5 where a stacker crane travels. A seismic control structure 2 is arranged between the juxtaposed racks 9, in a space 6 between a pair of juxtaposed racks 9, such that both ends of a vibration control damper 17 are provided in the oblique direction in a vertical plane. The vibration control damper 17 is disposed over a plurality of stages downwardly from the top of the rack 9 such that the bending and shear deformation of the rack 9 is converted to the deformation in an axial direction during the time of shaking occurrence due to an earthquake and the like, so as to absorb and attenuate the shaking.

Description

  The present invention relates to a vibration control structure for a rack shelf.

  As a warehouse for storing stored items such as products and parts, a rack is configured with a cantilever structure that supports arms with an assembly column made of vertical members and lattice materials, and a pallet with stored items placed on the arms is placed In addition, a three-dimensional automatic rack warehouse provided with a stacker crane for conveying pallets between racks is often used. However, in such an automatic rack warehouse, damage is not lost every time a big earthquake occurs, and there is a great need for improving earthquake resistance from the viewpoint of business continuity.

  Seismic isolation is one of the measures for improving the earthquake resistance of automatic rack warehouses. However, for example, if construction is performed to install the seismic isolation device with the entire floor of the warehouse as a double floor, a huge amount of money is required. In addition, the automatic rack warehouse is lighter than ordinary buildings, and the wind load is relatively large compared to the load during earthquakes, so it is difficult to take sufficient deformable width in the seismic isolation layer, and the seismic isolation effect is sufficient There is a problem that cannot be demonstrated. Although there is an idea of seismic isolation for each rack inside the warehouse, in order to obtain a sufficient seismic isolation effect, it is necessary to allow deformation of several tens of centimeters in the rack base seismic isolation device. There is a problem of payment.

  On the other hand, as a measure for improving seismic resistance that is simpler than seismic isolation, there is a method of controlling the vibration using a damper for absorbing vibration. It is described to do.

  Patent Documents 2 and 3 describe a structure for damping vibration of a rack warehouse that uses a tensile force or a compressive force acting on the rack by shaking and absorbs shaking by a brace damping device attached to the rack. Yes.

JP 2003-165602 A JP-A-10-236617 JP-A-10-236618

  In the seismic control method using the tuned mass damper of Patent Document 1, it is necessary to synchronize the vibration period of the damper with a rack or the like, but the total amount and weight of the stored items in the rack are changing in daily operations. For this reason, it is difficult to always be in a synchronized state. In addition, in the event of a large earthquake, the pallet slides on the brace, so the natural period may be disturbed and the tuning of the tuned mass damper may go wrong. If the effect of the damper is not sufficient, excessive stress is generated in the rack and it is damaged, and it takes a lot of cost and time to repair.

  Moreover, in patent document 1, since a damper is arrange | positioned in a rack, there also exists a problem that a storage space reduces. Although it is conceivable to separately arrange the damper above the rack, it is difficult to install if there is not enough room in the ceiling of the warehouse.

  Furthermore, the rack has a thin and high structure, and has almost braces other than the surface from which the cargo is originally taken in and out. The methods of Patent Documents 2 and 3 have few structures that can be used for reinforcement.

  The above technique absorbs shaking mainly by utilizing shear deformation of the rack. However, bending deformation is also applied to the rack when shaking such as an earthquake occurs. As a vibration control device, if both of these can be used, the vibration control effect is high and more desirable.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a rack shelf damping structure that can be suitably damped.

  In order to achieve the above-described object, the present invention provides a plurality of sets each including a pair of racks connected by a connecting member with a traveling space of a stacker crane interposed therebetween, and between adjacent racks, between adjacent racks. The rack shelf damping structure is characterized in that both ends of the damper are provided obliquely on the vertical plane.

  It is preferable that the damper is provided on an upper portion of the rack. For example, the damper is provided in a plurality of stages from the top to the bottom of the rack.

  Moreover, even if the said adjacent group is each provided in the inside of another structure, the said damper can be arrange | positioned through the hole provided in the said structure.

  In the present invention, a damper can be installed in an oblique direction between adjacent racks using a space between the pair of racks that does not adversely affect the operation of the stacker crane. As a result, the rack displacement difference caused by bending or shear deformation during an earthquake or the like can be converted into the axial deformation of the damper, and the vibration can be absorbed and attenuated, resulting in a great seismic control effect. Moreover, since the vibration control effect reaches each rack of each set, it is efficient. Furthermore, the seismic control structure of the present invention is not as large as a seismic isolation device and can be easily attached to an existing rack shelf, and does not depend on the state of the load unlike TMD. Moreover, it can be applied even when there is no margin in the ceiling, and it is low in cost and has high workability.

  In addition, when a vibration such as an earthquake occurs, bending or shear deformation appears prominently near the upper part of the rack. Therefore, by attaching a damper to the upper part, the damping effect can be efficiently exhibited with a small amount of damper. Moreover, the control performance with respect to a bending deformation etc. improves by providing a damper over several steps from upper part.

  The present invention can be applied to various rack warehouses.For example, in the case of expanding the warehouse, by connecting the racks of the existing warehouse and the new warehouse with dampers that are passed through holes provided in the structure, Easily build a damping structure.

  ADVANTAGE OF THE INVENTION According to this invention, the damping structure of the rack shelf which can be suitably damped can be provided.

Diagram showing damping structure 2 The figure which shows the state at the time of the deformation | transformation of the rack 9. The figure which shows the example from which the height of the rack 9 of each group differs The figure which shows the 2nd Embodiment of this invention The figure which shows the 3rd Embodiment of this invention

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram showing a vibration control structure 2 of a rack shelf 3 according to the first embodiment.

  As shown in FIG. 1, the rack shelf 3 is independently installed inside the structure 1. The rack shelf 3 is composed of a plurality of racks 9. The rack 9 has a cantilever structure in which an arm (not shown) is supported by an assembly column constituted by using a vertical member 11 and a lattice material 13. A pallet (not shown) on which stored items are placed is arranged on the arms.

  In the rack shelf 3, the tops of the pair of racks 9 that sandwich the space 5 are connected to each other by a beam 15 (connecting material). The space 5 is used for traveling a stacker crane (not shown) that automatically loads and unloads stored items.

  In the present embodiment, a plurality of pairs (two in the example shown in the figure) are arranged side by side in the structure 1. A space 6 between a set of adjacent racks 9 becomes a dead space where the stacker crane does not travel. In the present embodiment, a three-dimensional automatic rack warehouse is configured in this way, and the vibration control structure 2 is installed using the space 6 described above.

  In the space control structure 2, both ends of the vibration control damper 17 are provided in the space 6 in an oblique direction on the vertical plane between adjacent racks 9. As the damping damper 17, for example, a hydraulic damper can be used, but is not limited thereto.

In the present embodiment, the vibration dampers 17 are provided in a plurality of stages while changing the height from the upper part of the rack 9 to the lower part, and are arranged over several layers near the upper part where deformation at the time of occurrence of an earthquake or the like is particularly remarkable. . These seismic dampers 17 are continuously arranged up and down while changing the inclination direction in a zigzag shape. However, the arrangement of the damping damper 17 is not limited to this.
Both ends of the damping damper 17 are pin-joined to the racks 9 on both sides. The lower end of the upper damping damper 17 and the upper end of the lower damping damper 17 are pin-joined using the same joint location.

  FIG. 2 is a diagram illustrating a state in which the rack 9 is deformed due to a shake such as an earthquake.

  As shown in FIG. 2A, the vertical displacement difference H is generated between the opposing side surfaces of the adjacent racks 9 due to the bending deformation of the racks 9 due to shaking. Further, as shown in FIG. 2B, due to the bending shear deformation of the rack 9 due to shaking, a horizontal displacement difference D of the rack 9 occurs between the upper end height and the lower end height of the damping damper 17.

  In the vibration control structure 2, such displacement differences H and D can be converted into axial deformation of the vibration control damper 17 to absorb and attenuate the vibration. Each damping damper 17 exhibits a damping effect by extending in the axial direction with respect to one swing and contracting in the axial direction with respect to the other swing.

  As described above, in the vibration control structure 2 of the present embodiment, a space between the pair of racks 9 that does not adversely affect the operation of the stacker crane is used in an oblique direction between adjacent racks 9. A damping damper 17 is installed. Thereby, the displacement difference of the rack 9 generated by bending or shearing deformation at the time of an earthquake or the like can be converted into the axial deformation of the vibration control damper 17, and the vibration can be absorbed and attenuated, resulting in a large vibration control effect. Moreover, since the vibration control effect reaches each of the racks 9 in each group, it is efficient. In this way, serious damage to the main body of the rack shelf 3 can be prevented and the damage can be reduced.

  Furthermore, the damping structure 2 is not as large as the seismic isolation device, and can be easily attached to an existing rack shelf, and does not depend on the state of the load unlike TMD. Moreover, it can be applied even when there is no margin in the ceiling, and it is low in cost and has high workability.

  In addition, when the rack shelf 3 is provided independently inside the structure 1 as in the present embodiment, the vibration control structure 2 can be easily and inexpensively constructed only by the rack shelf 3 without refurbishing the structure 1. There is also an advantage that can be built. However, the present invention is not limited to this. For example, the present invention can be applied to a case where the rack 9 also serves as a structural portion of the structure 1.

  In the present embodiment, the vibration dampers 17 are provided in a plurality of stages from the top of the rack 9 to the bottom. When a vibration such as an earthquake occurs, bending or shear deformation appears prominently near the upper part of the rack 9. By attaching the damping damper 17 to the upper part, it is possible to efficiently exhibit the damping effect with few damping dampers 17. it can. Moreover, the control performance with respect to bending deformation improves especially by providing the damping damper 17 over multiple steps from the upper part. It is also possible to continuously arrange the damping damper 17 from the upper part to the lower part as necessary.

  However, the arrangement of the damping damper 17 is not limited to this, and it is sufficient that at least one damper is provided with both ends inclined in the vertical plane, and the arrangement and the number on the plane are not particularly limited. It is also possible to arrange the upper and lower damping dampers 17 at intervals. Such an arrangement of the damping damper 17 or a joining method of the damping damper 17 and the rack 9 can be appropriately determined in consideration of workability and damping effect.

  Further, the number, arrangement, height, and the like of the racks 9 are not limited to those described in the first embodiment. For example, even if the heights of the racks 9 in each group are different as shown in FIG. 2 may be attached.

  Subsequently, another embodiment of the present invention will be described. The following embodiments will mainly describe differences from the first embodiment, and the same points will be denoted by the same reference numerals in the drawings and the like, and description thereof will be omitted.

[Second Embodiment]
FIG. 4 shows a second embodiment of the present invention. The second embodiment is an example in which the above-described pair of racks 9 is provided as a rack shelf 3 in the structure 1.

  In this case, the space 6 between the pair of racks 9 is divided by the outer wall or the like of the structure 1. In such a case, after providing the through-hole 1a in the structure 1 and passing the vibration damping damper 17, the vibration damping damper 17 is installed between the adjacent racks 9 as in the first embodiment. As a result, the same effect as in the first embodiment can be obtained. When the warehouse is expanded, the vibration control device 2 is provided between the rack shelf 3 of the existing warehouse and the new warehouse, or the vibration control device 2 is installed between the existing warehouses. This is effective when connecting the rack shelves 3 of each warehouse.

[Third Embodiment]
FIG. 5 shows a third embodiment of the present invention. The third embodiment is an example in which a pair of the above-described pair of racks 9 such as a freezer warehouse, for example, is covered with a heat insulating panel 4.

  In this case, the space 6 between the pair of racks 9 is divided by the heat insulating panel 4. Also in this case, after the through-hole 4a is provided in the heat insulation panel 4 and the damping damper 17 is passed, the damping damper 17 is installed between the adjacent racks 9 as in the first embodiment. Thereby, the effect similar to 1st Embodiment is acquired. Note that the remaining space of the through hole 4a through which the damping damper 17 is passed may be sealed with a sealing material (not shown) having heat insulation properties.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

1 ......... Structure 1a, 4a ......... Through hole 2 ......... Vibration control structure 3 ......... Rack shelf 4 ......... Insulation panel 5, 6 ......... Space 9 ......... Rack 15 ......... Beam 17 ......... Seismic damper

Claims (4)

A plurality of sets of a pair of racks connected by a connecting material across the traveling space of the stacker crane are arranged,
A rack shelf vibration control structure characterized in that, between the adjacent groups, between the adjacent racks, both ends of the damper are provided obliquely in the vertical plane.   2. The rack shelf vibration control structure according to claim 1, wherein the damper is provided on an upper portion of the rack.   The rack shelf vibration control structure according to claim 1 or 2, wherein the damper is provided in a plurality of stages from an upper part to a lower part of the rack. The adjacent sets are each provided in a separate structure;
The rack shelf damping structure according to any one of claims 1 to 3, wherein the damper is disposed through a hole provided in the structure.

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