JP6278821B2 - Rack damping device support structure - Google Patents

Description

  The present invention relates to a support structure for a rack damping device.

  In order to improve the efficiency of the logistics system, there is known a three-dimensional automatic warehouse constructed by arranging a plurality of racks side by side and installing a stacker crane on rails laid on the floor between the racks. . The stacker crane includes a loading platform that moves up and down along the main pillar, and a fork that loads and unloads the load on the pallet. The rack is provided with an opening on the front side of the crane so that the stacker crane can load and unload the load. In this opening, arms are arranged in parallel with the forks, and a pallet loaded with loads to be stored is placed on the arms and stored.

  In such a structure, there is a possibility that the pallet may fall from the arms due to the collapse of the load in the event of a large earthquake, so the following vibration control measures have been taken. Conventional vibration suppression measures include a so-called tuned mass damper (TMD) equipped with a movable mass adjusted according to the natural frequency of the rack structure and a damper for damping the vibration of the movable mass. There was a structure to do (for example, refer patent document 1).

  As an installation method of TMD, there is a method as shown in Patent Document 1. In the installation method of Patent Document 1, the TMD is detachably installed below the fixed beam member at the upper end of the rack. In such an installation method, in order to fix the TMD to the fixed beam, the TMD must be lifted and held at a position higher than the load at least temporarily, so that a lifting device is provided in addition to the existing stacker crane. There was a need. In addition, it is necessary to separately provide a fixed beam, and it is necessary to ensure the rigidity of the suspension material in order to transmit the horizontal force.

  Then, there exist some which are shown in patent document 2 as an installation method in consideration of workability. In the installation method of Patent Document 2, a TMD is provided in the mounting frame, and the mounting frame is lifted and installed on a rack shelf by a stacker crane. However, in order for TMD to exhibit predetermined performance, it is necessary to ensure the rigidity of the mounting frame, which causes problems such as an increase in the frame weight. Further, the fixing method between the mounting frame and the rack is not clearly shown.

  Therefore, the present inventors have invented a rack damping device that is easy to install (see Patent Document 3). The rack damping device includes an additional mass supported slidably, a damper that generates a damping force in a sliding direction of the additional mass, a fixing member that fixes the additional mass and the damper to the rack, The fixing member is fixed to the pallet mounting portion of the rack, slidably supports the additional mass, and transmits the damping force of the damper to the rack. According to such a rack vibration control device, by providing a fixing member that is fixed to the pallet placement unit, if the vibration control device can be integrated and fixed to the pallet placement unit in advance, The vibration damping device can be easily installed using the stacker crane that performs loading and unloading without processing the mounting portion.

Japanese Patent No. 3800511 JP 2004-10189 A JP 2013-180870 A

  However, in the configuration of Patent Document 3, since the vibration damping device main body is placed on the pallet placing portion, there is a problem that the load capacity corresponding to the pallet placing portion is reduced. In particular, since the height dimension of the vibration damping device main body of Patent Document 2 is smaller than the height dimension of the luggage storage space above the pallet placement portion, the space above the vibration damping device main body is wasted.

  From such a viewpoint, it is an object of the present invention to provide a support structure for a rack damping device that can effectively use the space above the rack damping device to suppress a decrease in the load capacity.

  An invention according to claim 1 for solving such a problem is a support structure for supporting a rack damping device having a frame for supporting a movable mass on a rack, wherein the frame is a part of the rack. Suspended by a plurality of hanging jigs extending downward from the pallet placing part, and fixed to the rack column positioned below the pallet placing part via a fixing jig, The rack damping device support structure according to claim 1, wherein the frame and the movable mass are accommodated at a position lower than the pallet placement portion.

  According to such a structure, since a pallet can be mounted on the pallet mounting part which suspended the rack damping device, the space above a rack damping device can be utilized effectively. In addition, if the baggage is short, it can be placed on the lower pallet placing part of the pallet placing part on which the rack damping device is suspended, so that it is possible to minimize a decrease in the load capacity.

  According to a second aspect of the present invention, the support column is arranged at a rectangular apex position in plan view, and the four fixing jigs are provided, and the four fixing jigs are the rectangular ones. Each of them extends along a diagonal line.

  According to such a configuration, the fixing jigs facing each other are arranged in a balanced manner on the same line, so that the rack swing can be efficiently transmitted to the vibration damping device main body. Therefore, the vibration damping effect can be increased. Further, since the fixing jig is provided on the side of the frame, the luggage storage space is not reduced.

  According to the rack damping device support structure of the present invention, it is possible to effectively use the space above the rack damping device to suppress a decrease in the load capacity.

It is the front view which showed the rack damping device which concerns on embodiment of this invention. It is the side view (AA arrow directional view of FIG. 1) which showed the rack damping device which concerns on embodiment of this invention. It is the top view (BB line arrow figure of Drawing 1) which showed the rack damping device concerning the embodiment of the present invention. It is the top view (CC line arrow view of FIG. 1) which showed the rack damping device which concerns on embodiment of this invention. It is the enlarged plan view which showed the modification of the fixing jig.

  First, the configuration of the rack in which the rack damping device 1 is provided will be described. The rack is provided with a plurality of pallet storage units arranged in multiple stages and multiple rows in order to improve the efficiency of the distribution system.

  As shown in FIG. 3, the pallet housing portion is surrounded by four columns 2, 2,... Arranged in front, rear, left and right (rectangular vertical position in plan view) as viewed from the stacker crane carrying the load. It is. A brace 3 is provided on the support 2. A pallet is placed on the arm 3. The brace 3 is provided on both the left and right sides of the pallet housing part. The arm 3 extends in the front-rear direction, and is stretched over the distal ends of a pair of protruding members 4, 4 that protrude from the front and rear columns 2, 2 adjacent to each other. The protruding member 4 extends from the support column 2 to the left and right sides, and the arm 3 is connected to both ends orthogonally. Arms 3 and 3 on the left and right sides of the pallet housing part constitute a pallet placing part for placing one pallet.

  As shown in FIG. 1, the rack damping device 1 has a width dimension shorter than the distance between the arms 3 and 3 adjacent in the left-right direction. The rack damping device 1 includes a frame 10, a movable mass 20 supported by the frame 10, and a damper 30 that suppresses a displacement amount of the movable mass 20 in the sliding direction.

  As shown in FIGS. 1 and 2, the frame 10 slidably supports the movable mass 20 and is fixed to the rack. The frame 10 of the present embodiment is configured by combining square pipes in the left-right direction and the front-rear direction, and has a frame shape. The frame 10 is provided with a pair of sliding portions 11 and 11 that slidably support the movable mass 20. A linear guide is used for the sliding portion 11. The linear guide extends in the front-rear direction. An oil pan 12 that covers the entire lower surface of the frame 10 is provided at the lower portion of the frame 10.

  The movable mass 20 can slide in the front-rear direction along the sliding portion 11. The movable mass 20 has a flat rectangular parallelepiped shape. The shape of the movable mass 20 is not limited to a rectangular parallelepiped.

  As shown in FIG. 1, the damper 30 is provided to suppress the displacement amount of the movable mass 20 in the sliding direction. The damper 30 is arranged along the sliding direction of the movable mass 20 so as to generate a damping force in the sliding direction (front-rear direction) of the movable mass 20. The damper 30 is made of an oil damper, for example. The configuration of the damper 30 is an example, and other configurations may be used. For example, the damper 30 may be another type of damper such as a viscoelastic damper, a steel material, or a hysteresis damper using friction.

  Next, a support structure for supporting the rack damping device 1 on the rack will be described. As shown in FIGS. 1 and 2, the frame 10 is suspended by a plurality of suspension jigs 50 extending downward from the pallet placement portion (arm 3), and the fixing jig 60 is attached to the column 2. Is fixed.

  The hanging jig 50 is made of a bent plate material, and includes a hanging plate portion 51, a horizontal plate portion 52, and a folded plate portion 53. Four hanging jigs 50 are provided and support the vicinity of the four corners of the rack damping device 1 in a plan view (see FIG. 3).

  The drooping plate portion 51 hangs downward from the side surface of the arm 3, and the lower end portion of the drooping plate portion 51 is connected to the frame 10. The lower end portion of the hanging plate portion 51 is in contact with the outer peripheral surface of the frame 10 and is fixed to the frame 10 with a fastener such as a bolt. When the rack damping device 1 is supported, the hanging plate portion 51 does not protrude upward from the upper end surface of the arm 3 and the pallet is placed on the upper arm 3 of the rack damping device 1. At the time of installation, the rack vibration control device 1 is provided with a hanging length at the top of the rack damping device 1 so as to obtain a clearance for inserting a stacker crane fork.

  As shown in FIG. 1, the horizontal plate portion 52 is bent at a right angle from the upper end of the drooping plate portion 51 and is placed on the upper surface of the arm 3. The horizontal flat plate portion 52 is placed so as to extend in the width direction of the arm 3. The length dimension of the horizontal plate portion 52 is equal to the width dimension of the upper surface of the arm 3.

  The folded plate portion 53 is bent at a right angle from the tip of the horizontal plate portion 52 and extends downward. The folded plate portion 53 is parallel to the hanging plate portion 51, and the hanging plate portion 51 and the folded plate portion 53 sandwich the arm 3 from both sides in the width direction. The folded plate portion 53 prevents the hanging jig 50 from shifting in the width direction of the arm 3. The folded plate portion 53 extends below the lower end of the arm 3 by a predetermined length, and a retaining member 54 made of a bolt is attached to the lower end portion of the folded plate portion 53. The retaining member 54 is bridged between the folded-back plate portion 53 and the hanging plate portion 51 and passes through the lower part of the arm 3. Thus, even when an upward force is applied to the hanging jig 50 during an earthquake, the arm 3 does not come off.

  As shown in FIG. 4, the fixing jig 60 is a member for preventing the frame 10 from shaking, and is provided between the support column 2 and the frame 10. Four fixing jigs 60 are provided. The four fixing jigs 60, 60... Extend along diagonal lines of a rectangle that constitutes the position of the support 2. The fixing jig 60 presses the frame 10 from four directions to fix the horizontal position of the rack damping device 1.

  The fixing jig 60 includes a frame fixing portion 61, a column fixing portion 62, and a connecting portion 63. The frame fixing portion 61 includes a vertical bracket 64 and a horizontal bracket 65. The vertical bracket 64 is made of a metal plate, is in contact with the outer peripheral side surface of the frame 10, and is fixed to the frame 10 with a fastener such as a bolt. The horizontal bracket 65 is made of a metal plate, welded to the surface of the vertical bracket 64, and extends in the horizontal direction.

  The column fixing part 62 includes a column surrounding member 66 and a horizontal bracket 67. The strut surrounding member includes a pair of L-shaped plates 66a and 66b bent in an L shape. The L-shaped plates 66a and 66b are formed by bending a metal plate, and one end portions are pin-coupled to each other and can be opened and closed. The L-shaped plates 66a and 66b surround the column 2 and are fixed to the column 2 in a closed state. Flange portions 68 extending outward are formed at the other ends of the L-shaped plates 66a and 66b, and are fixed to each other by bolts and nuts. The horizontal bracket 67 is made of a metal plate, welded to the inner surface of the L-shaped plate 66a located on the rack damping device 1 side, and extends in the horizontal direction.

  The connecting portion 63 is made of a rectangular metal plate, and spans between the horizontal bracket 65 of the frame fixing portion 61 and the horizontal bracket 67 of the column fixing portion 62. One end of the connecting portion 63 is pin-coupled to the horizontal bracket 65, and the other end of the connecting portion 63 is pin-coupled to the horizontal bracket 67. Thereby, the arrangement angle of the column fixing part 62 with respect to the frame fixing part 61 can be adjusted.

  In addition, when a heavy movable mass is installed in the rack damping device and a large damping force acts and the fixing jig 60 is required to have a large rigidity, the turnbuckle 69 is provided as follows. A pair of turnbuckles 69 are provided between the connecting portions 63 and 63 of the fixing jigs 60 and 60 adjacent in the front-rear direction. The turnbuckle 69 connects and integrates adjacent fixing jigs 60. The frame side end of one connecting part 63 and the column side end of the other connecting part 63 are connected by one turnbuckle 69, and the column side end of one connecting part 63 and the frame of the other connecting part 63 are connected. The side ends are connected by another turnbuckle 69. That is, the pair of turnbuckles 69 and 69 are arranged so as to intersect in an X shape. One turnbuckle 69 is connected above the horizontal brackets 65 and 67, and the other turnbuckle 69 is connected below the horizontal brackets 65 and 67. Thereby, the turnbuckles 69 and 69 are offset up and down and do not interfere. By providing the turnbuckles 69 and 69 in this way, the vibration damping force can be shared by the two adjacent fixing jigs 60 and 60 and transmitted to the column 2.

  In the support structure configured as described above, as shown in FIG. 1, when installing the rack damping device 1, first, the rack damping device 1 is suspended on the arms 3 and 3 using a stacker crane. A hanging jig 50 is fixed to the rack vibration damping device 1 in advance. In the stacker crane, the rack damping device 1 is automatically transported to the height position of the arm 3, and the rack damping device 1 is moved onto the arm 3 with the stacker crane fork. Then, the hanging jig 50 is locked to the arm 3 by lowering the rack damping device 1 to a predetermined position by manual operation. As described above, the rack damping device 1 can be easily suspended using the stacker crane.

  At this time, the distance between the arms 3 and 3 is allowed an error of about plus or minus 5 mm depending on the construction accuracy, but the width of the rack damping device 1 is made smaller than the distance between the arms by an allowable error, and If the upper end portion of 50 is widened to the outside larger than the allowable error, the hanging jig 50 can be automatically locked to the arm 3 regardless of the construction accuracy.

  Thereafter, a retaining member 54 is attached to the lower end portion of the folded plate portion 53. When the suspension of the rack vibration control device 1 is completed, the fixing jig 60 is installed by post-construction. When fixing the fixing jig 60 to the support column 2, the support column with the outer L-shaped plate 66b opened to the L-shaped plate 66a (refer to the one-dot chain line in the upper right fixing jig 60 in FIG. 4). After the L-shaped plate 66a is brought into contact with 2, the L-shaped plate 66b is closed. And the flange parts 68 and 68 are fixed with a volt | bolt nut.

  According to the support structure of the rack vibration control device having the above-described configuration, the rack vibration control device 1 is supported by the pallet placing portion while being suspended from the arm 3, as shown in FIG. The suspended rack damping device 1 does not protrude upward from the upper surface of the arm 3. Thus, since the pallet can be placed on the pallet placing portion that supports the rack damping device 1, the space above the rack damping device 1 can be used effectively. Further, even under the rack vibration control device 1, if the baggage is short, it can be placed on the lower pallet placement part on which the rack vibration control device 1 is suspended. Can be minimized. Such a support structure can be applied to an existing rack.

  Further, by installing the fixing jig 60, the damping force of the rack damping device 1 can be smoothly transmitted from the frame 10 to the support column 2 via the fixing jig 60. It can be demonstrated. In addition, since the fixing jig 60 extends along a rectangular diagonal line with the column 2 position as the apex angle, the fixing jigs 60 facing each other are arranged on the same line in a balanced manner, and the frame 10 It can be held in good balance from four directions. Therefore, the rack swing can be efficiently transmitted to the rack damping device 1. Further, since the fixing jig 60 is provided on the side portion of the frame 10, the luggage storage space is not reduced.

  According to such a support structure, it is possible to effectively use the space above and below the rack damping device 1 to suppress a decrease in the load capacity.

  Next, a modified example of the fixing jig will be described with reference to FIG. The fixing jig 60a is different in the structure of the connecting portion 63a. A pantograph jack 70 is provided at an intermediate portion of the connecting portion 63a. The jack 70 can be adjusted in length, and is configured to push open the frame fixing portion 61 and the column fixing portion 62. Other configurations are the same as those of the fixing jig 60, and thus the same reference numerals are given and description thereof is omitted.

  According to such a structure, since the length of the connection part 63a can be adjusted according to the distance between the support | pillar 2 and the flame | frame 10, the construction error of the support | pillar 2 can be absorbed and the flame | frame 10 can be supported reliably. (Adjust function). Further, since the rack damping device 1 is supported in a state where the fixing jig 60 pushes the columns 2, 2,... From the inside, the force (damping force) exerted by the rack damping device 1 is applied to the column 2. Can be communicated directly to. The adjustment function satisfies the function if two or more of the fixing jigs 60 are provided. Therefore, it suffices if there are at least two fixing jigs 60 each having a pantograph-type jack 70, and the other may be a simple steel fixing jig.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably. The rack damping device 1 is not limited to the above-described embodiment, and may be a rack damping device having another configuration.

1 Rack vibration control device 2 Prop 3 Arm (pallet placement part)
50 Hanging jig 60 Fixing jig

Claims (2)

A support structure for supporting a rack damping device having a frame for supporting a movable mass on a rack,
The frame is suspended by a plurality of suspension jigs extending downward from the pallet placement portion of the rack, and via a fixing jig on the support column of the rack located below the pallet placement portion. Fixed,
The structure for supporting a rack vibration damping device, wherein the frame and the movable mass are accommodated at a position lower than the pallet placing portion. The support column is arranged at a rectangular vertex position in plan view,
Four fixing jigs are provided,
The support structure of the rack vibration control device according to claim 1, wherein the four fixing jigs extend along diagonal lines of the rectangle.

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