JP5972151B2 - Rack structure with exposed column base and improved damping and earthquake resistance - Google Patents

Description

  The present invention relates to a rack structure that has an exposed type column base that is used in an automatic warehouse or the like and that has improved vibration damping and earthquake resistance.

  Many racks used in automatic warehouses are not sufficiently earthquake-resistant, causing damage such as dropping of the cargo housed in the racks due to the earthquake, which may hinder warehouse operations. Therefore, it is desired to develop a vibration damping reinforcement method for existing racks that are not sufficiently earthquake resistant, but there are few effective means at present.

  If it is not limited to the reinforcement method with respect to the existing rack, the method of using a damping device is proposed as a means to improve the earthquake resistance of a rack. For example, Japanese Patent Laid-Open No. 2002-68432 (Patent Document 1) divides a rack column member into upper and lower parts, allows upward and downward displacement of the vertically divided column members, and allows relative movement in the horizontal direction. We are proposing seismic control racks that use metal yield points and joints such as dampers and springs. In a rack configured in this way, when a tensile force is applied to the rack column member due to an earthquake, the damping joint member yields and absorbs earthquake energy, or a damper or spring absorbs earthquake energy. It becomes possible to improve the vibration damping performance of the rack.

JP 2002-68432 A

  However, in order to improve the vibration damping performance by modifying the existing rack to the structure disclosed in Patent Document 1, the pillar member of the rack is divided into upper and lower parts and a metal yield point is used for the divided part. It is thought that welding or complicated fixing jigs are required to install and fix joints such as vibration control joints, dampers and springs, and it is dangerous because it requires work at high places. There is a problem that it takes time and effort.

  Therefore, the present invention provides a rack structure having an existing exposed-type column base with relatively simple reinforcement, requiring no work such as cutting or welding, and having improved vibration damping and earthquake resistance. It is intended to do.

An object of the present invention is to provide a plurality of column members, the column bases of the plurality of column members are exposed, and anchor bolts to a plurality of bolt holes formed in a base plate of the column bases of the plurality of column members. Is inserted,
The base plate is tightened with a predetermined tightening force by screwing nuts into the anchor bolts inserted through the plurality of bolt holes, and is a rack structure that can be fixed on a foundation floor surface,
Between a plurality of steel plates, a damper movable portion composed of a plurality of steel plates and contact flanges, a plurality of steel plates arranged in parallel so as to sandwich the steel plate of the damper movable portion, and a damper fixing portion composed of a mounting flange. A damper having a viscoelastic body to be accommodated;
At least a part of the contact flange of the damper movable portion abuts on the upper surface of the base plate of the column base, and the mounting flange of the damper fixing portion is driven inside or outside the base plate of the column base. By attaching nuts to the plurality of anchor bolts, it is attached to the foundation floor surface,
By separating the nut from the base plate, the base plate is configured to be movable in the vertical direction ,
The anchor bolt inserted through the base plate is covered with a cylindrical film having a low frictional resistance, and a filler is injected between the cylindrical film and the anchor bolt to solidify the bolt hole of the base plate. It is achieved by a rack structure with improved vibration damping and earthquake resistance having an exposed-type column base that reduces the frictional resistance between the inner surface of the base plate and the anchor bolt and smoothes the floating of the base plate .

  In the present specification, “separate the nut from the base plate” means that the nut is screwed to the anchor bolt so as to be separated from the base plate, and the nut is screwed to the anchor bolt. Both cases are not included.

  According to the present invention, the rack movable member is fixed to the foundation floor surface by contacting the damper movable portion with the upper surface of the base plate of the column base and screwing the mounting flange of the damper fixing portion to the plurality of anchor bolts. Because the nut that fixes the base plate of the column base is separated from the base plate, the base plate of the column base can be moved in the vertical direction. Therefore, if an acceleration exceeding a certain level is applied to the rack structure during an earthquake, the rack Locking occurs in the structure. At this time, the other column base of the rack structure is lifted with the column base on one side of the rack structure as a fulcrum, and the damper that is in contact with the upper surface of the base plate of the column base It is possible to suppress the vibration of the rack structure due to an earthquake by transmitting the lifting displacement and applying a damping force to the rack structure. To become, it is possible to improve the vibration damping property and seismic resistance of the rack structure.

According to the present invention, since the anchor bolt is inserted through the plurality of bolt holes formed in the base plate, the horizontal seismic force can be borne by the shear resistance of the plurality of anchor bolts.
Furthermore, according to the present invention, since the anchor bolt is covered with the cylindrical film via the intermediate layer made of the filler, the cylindrical film is disposed between the inner surface of the bolt hole formed in the base plate. By using a material with low frictional resistance, the seismic force is applied to cause the rack structure with the exposed column base to lock, and the anchor bolt is formed on the base plate when the base plate of the column base rises. Since the base plate can be lifted smoothly by preventing it from being caught on the inner surface of the bolt hole, the lifting displacement is transmitted to the damper as desired, and the rack structure having the exposed type column base. It becomes possible to secure vibration control and earthquake resistance.

  In a preferred embodiment of the present invention, the nut is screwed into a position separated from the base plate, thereby functioning as a stopper for preventing the base plate from rising excessively.

  In another preferred embodiment of the present invention, the nut is separated from the base plate by removing the nut from the anchor bolt.

  In another preferred embodiment of the present invention, the base plate is fitted by fitting the anchor bolt inserted through the base plate into the inside of a cylindrical member having an outside having low frictional resistance with the inner surface of the bolt hole. Friction resistance between the inner surface of the bolt hole and the anchor bolt is reduced, and the base plate is lifted smoothly.

  According to another preferred embodiment of the present invention, since the anchor bolt is configured to be fitted inside a cylindrical member having an outer surface with low frictional resistance with the inner surface of the bolt hole, an earthquake force is applied. As a result, the rack structure with exposed column base is locked, and when the base plate of the column base is lifted, the anchor bolt is prevented from being caught on the inner surface of the bolt hole formed in the base plate, and the base plate is smoothed. Therefore, it is possible to transmit the lift displacement to the damper as desired, and to ensure the vibration damping and earthquake resistance of the rack structure having the exposed column base.

In a preferred embodiment of the present invention, a rack structure having exposed column bases is provided with a plurality of substantially parallel column members and each of the column members in multiple stages and in parallel with each other with a predetermined width. It has arms that are attached shelf members, and is formed so that a pallet loaded with luggage can be placed on the arms. A plurality of possible bolt holes are formed, and the base plate is fastened with a predetermined tightening force and can be fixed on the foundation floor surface by screwing a nut into an anchor bolt inserted through the plurality of bolt holes. An automatic warehouse rack structure configured, one end of which is in contact with the upper surface of the base plate, and the other end is screwed onto a plurality of anchor bolts. It by comprising a damper attached to the foundation floor surface, by separating the nut from the base plate, the base plate is configured to be movable in the vertical direction.

  According to a further preferred embodiment of the present invention, as disclosed in Japanese Patent Laid-Open No. 2002-68432 (Patent Document 1), in order to improve the vibration damping performance of the existing rack structure, the column member is moved up and down. There is no need to perform large-scale reinforcement such as welding by installing seismic joints that use metal yield points and dampers, springs, etc. for the divided parts. Thus, it becomes possible to improve the vibration damping performance of the rack structure.

  According to the present invention, there is provided a rack structure having an existing exposed-type column base and having improved vibration damping and earthquake resistance with relatively simple reinforcement without requiring operations such as cutting and welding. It becomes possible to do.

FIG. 1 is a schematic elevational view of a pair of rack structures having exposed column bases according to a preferred embodiment of the present invention. FIG. 2 is a schematic elevational view of the column base where the damper is installed. 3 is a schematic cross-sectional view taken along line AA in FIG. FIG. 4 is a schematic perspective view of an anchor bolt inserted through the base plate of the column base portion of the rack structure according to a further preferred embodiment of the present invention. FIG. 5 is a schematic perspective view of an anchor bolt inserted through a base plate of a column base portion of a rack structure according to still another preferred embodiment of the present invention.

  FIG. 1 is a schematic elevational view of a pair of rack structures having exposed column bases according to a preferred embodiment of the present invention.

  As shown in FIG. 1, a rack structure 1 according to an embodiment of the present invention includes a first rack 3A and a second rack 3B extending in the vertical direction.

  Upper portions of the first rack 3 </ b> A and the second rack 3 </ b> B are connected by a rack connecting member 4.

  As shown in FIG. 1, the first rack 3A includes a first column 6A facing the second rack 3B and a second column 7A located on the opposite side of the second rack 3B. The second rack 3B includes a first column 6B facing the first rack 3A and a second column 7B positioned on the opposite side of the first rack 3A.

  The first column 6A and the second column 7A of the first rack 3A are connected by a shelf member 8A in the horizontal direction and also by an oblique member 9A.

  Therefore, a truss structure is formed by the first column 6A, the shelf member 8A, and the diagonal member 9A, and a truss structure is formed by the second column 7A, the shelf member 8A, and the diagonal member 9A. A plurality of shelves are formed by the first pillar 6A, the second pillar 7A, the shelf member 8A, and the diagonal member 9A.

  Similarly, the first column 6B and the second column 7B of the second rack 3B are connected by a horizontal shelf member 8B and also by an oblique member 9B.

  Accordingly, the truss structure is configured by the first pillar 6B, the shelf member 8B, and the diagonal member 9B, and the truss structure is configured by the second column 7B, the shelf member 8B, and the diagonal member 9B. A plurality of shelves are formed by the first pillar 6B, the second pillar 7B, the shelf member 8B, and the diagonal member 9B.

  FIG. 2 is a schematic elevational view of the column base portion on which the damper is installed, and FIG. 3 is a schematic cross-sectional view along the line AA in FIG.

  As shown in FIGS. 2 and 3, the column base of the first column 6A is integrated with the base plate 11 by welding or the like. Here, the base plate 11 is configured to be attachable to the foundation floor surface 10 by screwing a nut 13 to the anchor bolt 12.

  As shown in FIG. 2, in this embodiment, the nut 13 screwed into the anchor bolt 12 is separated from the base plate 11.

  In the present embodiment, a damper 15 is provided in the vicinity of the base plate 11 of the first pillar 6A.

  As shown in FIGS. 2 and 3, the damper 15 includes a mounting flange 15 </ b> A and a contact flange 15 </ b> B, and the contact flange 15 </ b> B is arranged to be pressed against the upper surface of the base plate 11.

  On the other hand, the attachment flange 15A of the damper 15 is attached to the foundation floor surface 10 by screwing nuts 15D into a plurality of anchor bolts 15C driven inside and outside the base plate 11 of the first pillar 6A. Yes.

  As shown in FIG. 3, the damper 15 includes a plurality of steel plates arranged in parallel so as to sandwich a damper movable portion 15F composed of a plurality of steel plates 15E and a contact flange 15B, and a steel plate 15E of the damper movable portion 15F. The damper fixing part 15H which consists of 15G and the attachment flange 15A is provided.

  As shown in FIG. 3, a viscoelastic body 16 is accommodated in the internal space defined by the damper fixing portion 15 </ b> H of the damper 15.

  Although not shown in FIGS. 2 and 3, a plurality of bolt holes 17 are formed in the base plate 11, and anchor bolts 12 are inserted into the respective bolt holes 17.

  In this embodiment, in this way, the mounting flange 15A of the damper 15 is fixed to the foundation floor surface 10 by the plurality of anchor bolts 15C, and a part of the contact flange 15B of the damper 15 presses the upper surface of the base plate 11. Is arranged.

  An anchor bolt 12 is inserted into a plurality of bolt holes 17 of the base plate 11 integrated with the column base of the first column 6A. A nut 13 screwed into the anchor bolt 12 is connected to the base plate 11. Between the base plate 11 and the nut 13 and the nut 15D for fixing the mounting flange 15A of the damper 15 is spaced apart from each other so as to be equal to the distance between the nut 15D for fixing the mounting flange 15A of the damper 15 and the base plate 11. A space in which the base plate 11 can move up and down is formed. Accordingly, the nut 13 screwed into the anchor bolt 12 and the nut 15D that fixes the mounting flange 15A of the damper 15 function as a stopper that prevents the base plate 11 from rising excessively.

  The second column 7A of the first rack 3A, the first column 6B of the second rack 3B, and the second column 7B have the same structure as the lower structure of the first column 6A of the first rack 3A. Have.

  Therefore, according to this embodiment, when a horizontal seismic force is applied to the rack structure 1, the first rack 3A and the second rack 3B are locked, and the first pillar 6A of the first rack 3A is locked. Alternatively, the second pillar 7A or the base plate 11 of the first pillar 6B or the second pillar 7B of the second rack 3B is lifted and lifted to the damper 15 attached to the foundation floor 10 by a plurality of anchor bolts 15C. When the displacement is transmitted and the viscoelastic body 16 accommodated in the damper 15 is deformed, the base plate 11 of the first column 6A or the second column 7A or the first column 6B or the second column 7B is attenuated. Since the force is applied and the seismic energy is absorbed, the vibration generated in the rack structure 1 due to the earthquake can be attenuated, and the rack structure 1 is controlled. It is possible to improve the sexual and shockproof.

  Further, according to this embodiment, since the anchor bolts 12 are inserted into the plurality of bolt holes 17 of the base plate 11, the horizontal earthquake applied to the rack structure 1 due to the shear resistance of the plurality of anchor bolts 12. Power is borne.

  Furthermore, according to the present embodiment, the mounting flange 15A of the damper 15 is attached to the foundation floor surface 10 by simply screwing the nuts 15D to the plurality of anchor bolts 15C, while the damper movable part of the damper 15 is mounted. A base plate 11 in which a part of 15F is integrated with the first column 6A or the second column 7A of the first rack 3A or the leg of the first column 6B or the second column 7B of the second rack 3B. The nut 13 is disposed so as to be pressed against the upper surface of the base plate 11 and screwed into the anchor bolts 12 inserted into the plurality of bolt holes 17 formed in the base plate 11. Since the seismic energy absorbed by the damper 15 can attenuate the vibration of the rack structure 1, The structure of the structure 1, with a simple reinforcement of modifying the structure of the rack structure 1 according to the present embodiment, it is possible to improve the damping of the existing rack structure.

  FIG. 4 is a schematic perspective view of an anchor bolt 12 for fixing the base plate 11 integrated with the column base of the first column 6A of the rack structure 1 according to a further preferred embodiment of the present invention to the foundation floor surface 10. .

  As shown in FIG. 4, in this embodiment, the anchor bolt 12 has an outer diameter slightly smaller than the bolt hole 17 formed in the base plate 11, and between the inner surface of the bolt hole 17 of the base plate 11. It is accommodated in a cylindrical film 21 made of polytetrafluoroethylene or the like having a low frictional resistance. Between the tubular membrane 21 and the anchor bolt 12, a filler such as resin or cement is injected and solidified to form the intermediate layer 22, thereby forming the anchor bolt member 20. Although not shown in FIG. 4, in the present embodiment, the anchor bolt member 20 is formed in the same manner for the anchor bolt 15C inserted through the base plate.

  The anchor bolt member 20 configured as described above is inserted into a plurality of bolt holes 17 formed in the base plate 11. Although the nut 13 is not shown in FIG. 4 for the sake of simplicity, in this embodiment as well, the nut 13 screwed into the anchor bolt 12 is spaced from the base plate 11 in the same manner as in the previous embodiment. Are spaced apart so as to be equal to the distance between the base plate 11 and the nut 15D that fixes the mounting flange 15A of the damper 15, and between the base plate 11 and the nut 13 and the nut 15D that fixes the mounting flange 15A of the damper 15 Is formed so that the nut 13 screwed to the anchor bolt 12 and the nut 15D for fixing the mounting flange 15A of the damper 15 function as a stopper for preventing the base plate 11 from being lifted excessively. .

  As described above, when the anchor bolt 12 is simply inserted into the bolt hole 17 of the base plate 11 without forming the anchor bolt member 20, the rack structure 1 is locked during an earthquake, and the first When the base plate 11 of the first column 6A or the second column 7A of the rack 3A or the first column 6B or the second column 7B of the second rack 3B is lifted, the anchor bolt 12 and the bolt hole 17 of the base plate 11 are used. In the present embodiment, the friction resistance between the anchor bolt 12 and the inner surface of the bolt hole 17 of the base plate 11 is limited. Since it is housed inside the cylindrical membrane 21 made of low polytetrafluoroethylene or the like, the base plate It is not the anchor bolt 12 but the tubular membrane 21 of the anchor bolt member 20 that contacts the one bolt hole 17, and therefore, the material having a low frictional resistance with the inner surface of the bolt hole 17 of the base plate 11 By forming the cylindrical film 21, when the rack structure 1 is locked, the base plate 11 is smoothly lifted as desired, and the lift is effectively transmitted to the damper, so that the rack can be further lifted. Vibration can be attenuated.

  FIG. 5 is a schematic perspective view of an anchor bolt 12 for fixing the base plate 11 integrated with the column base of the first column 6A of the rack structure 1 according to another preferred embodiment of the present invention to the foundation floor 10. is there.

  As shown in FIG. 5, in this embodiment, the anchor bolt 12 has an outer diameter slightly smaller than that of the bolt hole 17 formed in the base plate 11, and processing such as threading is applied to the inner surface. A cylindrical body 25 formed of a material having a low frictional resistance with the inner surface of the hole 17 is fitted. Although not shown in FIG. 5, in the present embodiment, the similar cylindrical body 25 is also fitted to the anchor bolt 15 </ b> C inserted through the base plate.

  As described above, if the anchor bolt 12 is simply inserted into the bolt hole 17 of the base plate 11, the rack structure 1 is locked during an earthquake, and the first column 6A of the first rack 3A or When the base plate 11 of the second column 7A or the first column 6B or the second column 7B of the second rack 3B is lifted, it is generated between the surface of the anchor bolt 12 and the inner surface of the bolt hole 17 of the base plate 11. Although there is a possibility that the base plate 11 is prevented from floating due to friction, in the present embodiment, the anchor bolt 12 is threaded on the inner surface, and the frictional resistance between the inner surface of the bolt hole 17 is low. Since it is fitted in the cylindrical body 25 formed of the material, it is the anchor bolt that contacts the bolt hole 17 of the base plate 11. 2 is a cylindrical body 25 in which the anchor bolt 12 is fitted and the frictional resistance between the bolt hole 17 and the inner surface of the bolt hole 17 is low. Therefore, the rack structure 1 is locked. In this case, the base plate 11 can be lifted smoothly as desired, the lifted displacement can be effectively transmitted to the damper, and the vibration of the rack can be further damped.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  For example, in the above-described embodiment, a description has been given of one structural surface in the case where the rack structure having an exposed column base is composed of a pair of rack structures, but the present invention is limited to such a rack structure. Instead, it can be widely applied to a rack structure having an exposed column base.

  Further, in the embodiment shown in FIGS. 1 to 3, the nut 13 is screwed into the anchor bolt 12 inserted into the plurality of bolt holes 17 formed in the base plate 11 so as to be separated from the base plate 11. However, it is not always necessary to screw all the nuts 13 to the anchor bolts 12 so as to be separated from the base plate 11, and the anchor bolts 12 are simply inserted into the plurality of bolt holes 17 of the base plate 11. Only the nut 13 can be configured not to be screwed into the anchor bolt 12.

  In the embodiment shown in FIGS. 1 to 3, the nut 13 is screwed so that all the anchor bolts 12 inserted into the plurality of bolt holes 17 formed in the base plate 11 are separated from the base plate 11. However, it is not always necessary to screw all the nuts 13 to the anchor bolts 12 so as to be separated from the base plate 11, so that the nuts 13 are not screwed only to some anchor bolts 12. It is also possible to configure such that only the nut 13 that is screwed to a part of the anchor bolts 12 is screwed so as to be separated from the base plate 11.

  Furthermore, in the said embodiment, although the viscoelastic body 16 is accommodated in the damper 15, it is not necessary to use the damper 15 in which the viscoelastic body 16 was accommodated, and various dampers are used. it can.

  In the embodiment shown in FIG. 4, the anchor bolt 12 is housed inside a cylindrical film 21 made of polytetrafluoroethylene or the like, but the cylindrical film 21 is formed in the bolt hole 17 of the base plate 11. The material is not particularly limited as long as it is made of a material having low frictional resistance with the inner surface of the material.

  Further, in the embodiment shown in FIG. 5, the anchor bolt 12 has a cylindrical shape in which the inner surface is threaded and the outer surface is formed of a material having a low frictional resistance with the inner surface of the bolt hole 17. Although it is fitted in the body 25, it is not always necessary to thread the inner surface of the cylindrical body 25, and the inner surface of the cylindrical body 25 is treated so that the frictional resistance with the anchor bolt 12 is increased. Alternatively, at least the inner surface of the cylindrical body 25 may be made of a material having a high frictional resistance with the anchor bolt 12.

  Although not shown in the embodiment, in order to further reduce the frictional resistance between the anchor bolt 12 and the inner surface of the bolt hole 17, the friction between the anchor bolt 12 and the inner surface of the bolt hole 17 may be reduced. Auxiliary treatments such as attaching a film with low resistance, applying a lubricant such as grease, and chamfering and smoothing the edges of the bolt holes may be performed.

  Furthermore, in the embodiment shown in FIG. 5, the cylindrical body 25 is used, but in order to facilitate attachment, a cylindrical material having a slit in a part of the cylindrical body 25 can be used, The tubular member may be formed by dividing the tubular member in advance and attaching each part to the anchor bolt 12.

DESCRIPTION OF SYMBOLS 1 Rack structure 3A 1st rack 3B 2nd rack 4 Rack connection member 6A 1st pillar of 1st rack 6B 1st pillar of 2nd rack 7A 2nd pillar of 1st rack 7B 1st Second pillar of second rack 8A Shelf member 9A Diagonal material 8B Shelf member 9B Diagonal material 10 Base floor 11 Base plate 12 Anchor bolt 13 Nut 15 Damper 15A Mounting flange 15B Contact flange 15C Anchor bolt 15D Nut 15E Multiple steel plates 15F Damper movable part 15G A plurality of steel plates 15H A damper fixing part 16 A viscoelastic body 17 A plurality of bolt holes 20 An anchor bolt member 21 A cylindrical film 22 An intermediate layer 25 A cylindrical body

Claims (2)

A plurality of column members, the column bases of the plurality of column members are exposed, anchor bolts are inserted into a plurality of bolt holes formed in the base plate of the column base of the plurality of column members,
The base plate is tightened with a predetermined tightening force by screwing nuts into the anchor bolts inserted through the plurality of bolt holes, and is a rack structure that can be fixed on a foundation floor surface,
Between a plurality of steel plates, a damper movable portion composed of a plurality of steel plates and contact flanges, a plurality of steel plates arranged in parallel so as to sandwich the steel plate of the damper movable portion, and a damper fixing portion composed of a mounting flange. A damper having a viscoelastic body to be accommodated;
At least a part of the contact flange of the damper movable portion abuts on the upper surface of the base plate of the column base, and the mounting flange of the damper fixing portion is driven inside or outside the base plate of the column base. By attaching nuts to the plurality of anchor bolts, it is attached to the foundation floor surface,
By separating the nut from the base plate, the base plate is configured to be movable in the vertical direction ,
The anchor bolt inserted through the base plate is covered with a cylindrical film having a low frictional resistance, and a filler is injected between the cylindrical film and the anchor bolt to solidify the bolt hole of the base plate. A rack structure with improved vibration damping and earthquake resistance, having an exposed column base, characterized by reducing frictional resistance between the inner surface of the base plate and the anchor bolt and smoothing up the base plate .   The rack structure according to claim 1, wherein the rack structure is made to function as a stopper for preventing the base plate from being lifted excessively by screwing the nut into a position separated from the base plate.

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