JP2015027911A - Rack vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rack vibration control device which is easily transferred and easily installed.SOLUTION: A rack vibration control device 10 is provided at a rack 2 for placing a pallet 5 and includes: a movable mass 20; a frame 30; and a fixing jig 50 which fixes the frame 30 to the rack 2. The frame 30 is placed on a pallet placement part of the rack 2, slidably supports the movable mass 20, and is fixed to a support pillar 11 of the rack 2 through the fixing jig 50. A bottom plate 45 is provided at a lower part of the frame 30.

Description

  The present invention relates to 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. An arm having a predetermined width is arranged in parallel with the fork in the opening, and a pallet loaded with a load to be stored is placed on the arm and is stored therein.

  In such a structure, when the rack structure is shaken by an earthquake, the pallet may fall from the arms due to collapse of the load, and therefore, the following vibration suppression measures have been taken. As a conventional vibration suppression measure, 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 dampening the vibration of the movable mass is racked. There was a structure installed at the top (see, for example, Patent Documents 1 and 2).

JP 2004-10189 A JP 2003-165602 A

  As a method of installing the TMD, in Patent Document 1, the TMD is detachably installed below the fixed beam member. However, the TMD is temporarily lifted to a predetermined height to fix the TMD to the fixed beam. It is necessary to prepare a scaffolding and a lifting crane, and it takes time to install it in an existing rack warehouse. In Patent Document 2, in consideration of workability, 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 the TMD to exhibit a predetermined performance, it is necessary to ensure rigidity of the mounting frame, and problems such as an increase in the frame weight occur. Further, the fixing method between the mounting frame and the rack is not clearly shown.

  Therefore, the present inventors have invented a rack vibration control device that is easy to install (Japanese Patent Application No. 2012-46111). The rack vibration control device includes an additional mass that is slidably supported, a damper that generates a damping force in a sliding direction of the additional mass, and a fixing jig that fixes the additional mass and the damper to the rack. And the fixing jig 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. It is a feature. According to such a rack vibration control device, by providing a fixing jig to be fixed to the pallet mounting part, if the vibration control device can be integrated in advance and fixed to the pallet mounting part, The vibration damping device can be easily installed without processing the pallet placing portion and using a stacker crane that loads and unloads the load.

  However, the rack vibration control device has a problem in that since the grooved steel is provided at the bottom, irregularities are generated on the bottom surface, which cannot be conveyed by a roller conveyor that is an existing conveyance facility.

  From such a viewpoint, an object of the present invention is to provide a rack vibration control device that can be easily transported and installed.

  The invention according to claim 1 for solving such a problem is a rack damping device provided in a rack for placing a pallet, wherein the movable mass, the frame, and the frame are fixed to the rack. And the frame is mounted on the pallet mounting portion of the rack, supports the movable mass in a slidable manner, and supports the rack post via the fixing jig. The rack vibration damping device is characterized in that a bottom plate is provided at a lower portion of the frame.

  According to such a configuration, since the bottom surface of the rack vibration damping device has a flat plate shape, it can be conveyed by a roller conveyor or the like which is an existing facility, and the rack vibration damping device can be easily conveyed. Further, since the rack damping device is fixed to the rack column via the fixing jig while being mounted on the pallet mounting portion, it can be easily installed on the rack. Furthermore, since the vibration damping force of the movable mass can be directly transmitted to the column by directly fixing the frame to the column, the damping effect can be enhanced.

  The invention according to claim 2 is characterized in that a claw insertion space into which a forklift claw can be inserted is formed in the frame. According to such a configuration, conveyance outside the rack can be easily performed using the forklift.

  The invention according to claim 3 is characterized in that the fixing jig includes an adjuster plate fixed to the frame, and the adjuster plate can be advanced and retracted with respect to a side surface of the support column of the rack. . According to such a configuration, the rack vibration control device can be fixed to the support without play by absorbing an error in the accuracy of the rack support.

  According to a fourth aspect of the present invention, the adjuster plate is fixed to the main body portion of the fixing jig via a bolt, and moves forward and backward with respect to the side surface of the support column by rotating the bolt. Features. According to such a configuration, the adjuster plate can be moved back and forth simply by rotating the bolt, and an error in the accuracy of how to build the support can be easily absorbed.

  The invention according to claim 5 is characterized in that the adjuster plate is formed of a wedge-shaped plate inserted into a gap between a main body portion of the fixing jig and a side surface of the support column. According to such a configuration, the adjuster plate can be moved back and forth simply by adjusting the insertion amount of the wedge-shaped plate fixing jig into the gap between the main body portion and the side surface of the column. The accuracy error can be absorbed.

  According to the vibration damping device of the present invention, the rack vibration damping device can be easily transported and easily installed.

It is the whole perspective view which omitted and showed a part of three-dimensional automatic warehouse. It is the top view which showed the rack damping device which concerns on embodiment of this invention. It is front sectional drawing which showed the rack damping device which concerns on embodiment of this invention. It is side surface sectional drawing which showed the rack damping device which concerns on embodiment of this invention. It is the figure which showed the fixing jig, Comprising: (a) is a top view, (b) is a side view. It is the figure which showed the modification of the adjuster plate of a fixing jig, Comprising: (a) is a top view, (b) is a side view.

  A rack damping device according to an embodiment of the present invention will be described with reference to the accompanying drawings. The rack damping device 10 is provided at the top (uppermost level) of the rack 2 of the three-dimensional automatic warehouse 1. As shown in FIG. 1, the rack 2 includes a plurality of pallet storage units arranged in multiple stages and multiple rows in order to improve the efficiency of the physical distribution system. The three-dimensional automatic warehouse 1 is configured by arranging a plurality of rows (two rows in this embodiment) of racks 2 in parallel and placing a stacker crane 4 on a rail 3 laid on the floor between the racks 2 so as to be able to travel. Has been. The stacker crane 4 includes a loading platform 4b that moves up and down along the main column 4a and a fork 4c (sliding fork) that loads and unloads the load on the pallet 5. The rack 2 is provided with an opening on the crane side so that the stacker crane 4 can be loaded and unloaded, the arm 6 is arranged with a predetermined width parallel to the fork 4c, and the load to be stored on the arm 6 is loaded. The pallet 5 is stored. A roller conveyor 7 is provided between the entrance of the building of the three-dimensional automatic warehouse 1 and the end of the rack shelf. A pallet is placed on the roller conveyor 7 by a forklift (not shown) or the like at the entrance of the building. The pallet (not shown) placed on the roller conveyor 7 is transferred to the rack shelf side, and then stacked and transported by the stacker crane 4 and accommodated in the rack 2 at a desired position.

  In the present embodiment, the direction in which the rack damping device 10 is viewed from the stacker crane 4 side is the front. The moving direction of the fork 4c of the stacker crane 4 is the X-axis direction (vertical direction in FIG. 2, vertical direction in FIG. 3, left-right direction in FIG. 4), and the opening width direction on the crane side front is the Y-axis direction (see FIG. 2 and 3 will be described as the left-right direction in FIG. 3 and the vertical direction in FIG. 4, and the height direction will be described as the Z-axis direction (the vertical direction in FIG.

  As shown in FIGS. 2 to 4, the rack damping device 10 is installed on the arm 6 provided in the rack 2. The brace 6 is connected in an orthogonal state to the tip portions of the projecting members 12 and 12 projecting in the Y-axis direction from the columns 11 and 11 adjacent in the X-axis direction. The arm 6 and the protruding member 12 are provided on both sides of an opening (see FIG. 3) formed on the crane side surface. The arm 6 and the tip of the protruding member 12 constitute a pallet placing portion.

  The rack damping device 10 includes a movable mass 20, a frame 30, and a fixing jig 50 that fixes the frame 30 to the rack 2.

  The movable mass 20 is slidably supported on the frame 30. The movable mass 20 is formed by laminating a plurality of plate materials (see FIG. 3) and has a flat rectangular parallelepiped shape (indicated by a two-dot chain line in FIG. 2). In addition, the shape of the movable mass 20 does not need to be trapped by a rectangular parallelepiped.

  As shown in FIGS. 3 and 4, the frame 30 is a portion that is placed on the pallet placement portion of the rack 2, and supports the movable mass 20 slidably, and the rack 2 via the fixing jig 50. It is a member fixed to. The frame 30 includes an upper frame 31 and a lower frame 32. The upper frame 31 has a frame shape in which cross members are combined into a rectangle, and the upper frame 31 is fixed and integrated on the lower frame 32.

  The upper frame 31 is provided with a sliding portion 33 that slidably supports the movable mass 20. The sliding part 33 uses a commercially available linear guide or sliding material. When a slip material is used, the structure is as shown in FIG. A linear guide member 34, a sliding member 35 provided on the guide member 34, and a moving member 36 that slides on the sliding member 35 are provided. The guide member 34 has a mountain shape whose cross section protrudes downward, and extends in the sliding direction of the movable mass 20 (X direction in the present embodiment). The guide member 34 is open at the top, and a sliding member 35 is provided on the top surface thereof. The sliding member 35 is made of a sliding material having a small coefficient of friction, such as a fluororesin, and is laid along the guide member 34. The lower surface of the moving member 36 protrudes in a mountain shape so as to make surface contact with the sliding member 35. The upper part of the moving member 36 is fixed to the bottom surface of the movable mass 20, and slides on the sliding member 35 integrally with the movable mass 20.

  As shown in FIGS. 2 to 4, a damper 37 is provided between the movable mass 20 and the upper frame 31. As shown in FIGS. 2 and 3, the damper 37 is disposed along the sliding direction of the movable mass 20 so as to generate a damping force in the sliding direction (X-axis direction) of the movable mass 20. One end of the damper 37 is connected to a bracket 21 provided on the bottom surface of the movable mass 20. The other end of the damper 37 is connected to a bracket 38 provided on the inner surface of the upper frame 31. The damper 37 is made of, for example, an oil damper, but is not limited to this, and may be a damper of another system such as a viscoelastic damper, a steel material, or a hysteretic damper using friction.

  As shown in FIG. 2, a plurality of spring members 39 are provided between the movable mass 20 and the upper frame 31. The spring member 39 is provided along the sliding direction (X-axis direction) of the movable mass 20 and is disposed symmetrically about the intermediate portion of the movable mass 20 in the X-axis direction. One end of the spring member 39 is connected to a bracket 22 provided on the bottom surface of the movable mass 20. The bracket 22 is provided at an intermediate portion in the X-axis direction, and spring members 39 are coupled to both ends of the bracket 22 in the X-axis direction. The other end of the spring member 39 is connected to a bracket 40 provided on the inner surface of the upper frame 31. The spring member 39 plays a role of returning the movable mass 20 to the origin after the movable mass 20 is moved by vibration such as an earthquake.

  As shown in FIGS. 3 and 4, the lower frame 32 includes three cross members extending in the horizontal direction (Y-axis direction) orthogonal to the sliding direction of the movable mass 20. The cross member is made of, for example, a steel material such as a square pipe or a grooved steel. Both ends of the lower frame 32 are placed on the arm 6 or the tip of the protruding member 12 via a bottom plate 45 described later. A bottom plate 45 is provided below the lower frame 32. The bottom plate 45 is a member disposed at the lowermost part of the rack vibration damping device 10 and has a flat plate shape with a lower surface covering the frame 30 from below. The bottom plate 45 has a rectangular shape in plan view and is fixed to the lower surface of the lower frame 32. The bottom plate 45 is formed in a planar size that slightly protrudes from the entire lower frame 32. The bottom plate 45 is placed on the arm 6. A rising portion is formed at the peripheral edge of the bottom plate 45, and the bottom plate 45 is formed in a box shape with an open top. According to the bottom plate 45 having such a shape, when oil leaks from an oil damper or the like, the bottom plate 45 can serve as an oil pan for preventing oil from leaking into the load stored below. In both cases, since the lower surface is smoothed, the rack damping device 10 can be conveyed by the roller conveyor 7 (see FIG. 1) or the like.

  As shown in FIG. 4, the lower frame 32 extends in the Y-axis direction and is arranged at intervals in the X-axis direction, so that the upper frame 31, the lower frame 32, and the bottom plate 45 allow the forklift pawls to move. A nail insertion space that can be inserted is partitioned. This claw insertion space is configured such that the claw of the forklift can be inserted in a direction (Y-axis direction) orthogonal to the moving direction of the fork 4c of the stacker crane 4. In this embodiment, the insertion direction of the fork of the stacker crane 4 (see FIG. 1) and the claw of the forklift are orthogonal to each other. May be the same. In this case, the extending direction of the lower frame may be the X-axis direction.

  As shown in FIG. 2, the fixing jig 50 is a member that fixes the frame 30 to the column 11 of the rack 2. The fixing jigs 50 are respectively fixed to the four corners of the frame 30. By pressing the side surfaces of the four columns 11, 11,. Crimp and fix to the four struts 11, 11,. The fixing jig 50 presses and restrains two surfaces (two surfaces inside the four columns 11, 11...) That face the adjacent columns 11 among the side surfaces of the columnar column 11.

  As shown in FIGS. 5A and 5B, the fixing jig 50 is arranged in parallel with the substrate portion 52, the orthogonal plate 53 arranged orthogonal to the substrate portion 52, and the substrate portion 52. A parallel plate 54, a first adjuster plate 55 that approaches and separates the support 11 from the orthogonal plate 53, and a second adjuster plate 56 that approaches and separates the support 11 from the parallel plate 54 are provided. The substrate portion 52, the orthogonal plate 53 and the parallel plate 54 constitute a main body portion of the fixing jig 50. 5 shows the fixing jig 50 in the lower right of FIG. 2, and the support 11 (shown by a two-dot chain line) in FIG.

  The substrate portion 52 is a plate that is fixed to the outer surface of the cross member that extends in the X-axis direction among the cross members that constitute the upper frame 31. The board portion 52 is bolted to the cross member. The substrate portion 52 may be fixed to the cross member by welding.

  The orthogonal plate 53 extends in the Y-axis direction perpendicular to the substrate portion 52 and is welded to the surface of the substrate portion 52. A reinforcing rib 57 fixed to the substrate portion 52 is welded to the back surface of the orthogonal plate 53 (the back surface of the surface facing the support column 11). The orthogonal plate 53 is disposed so as to be parallel to the side surface 11 a facing the column 11 adjacent in the X-axis direction among the side surfaces of the column 11. The orthogonal plate 53 is provided with a tap hole (not shown) through which a bolt B for pressing the first adjuster plate 55 to the support 11 is inserted. In the present embodiment, the nut member N is provided on the shaft portion of the bolt B to suppress loosening of the bolt due to vibration.

  The parallel plate 54 is orthogonal to the orthogonal plate 53 and extends in the X-axis direction, and is parallel to the substrate unit 52. The parallel plate 54 is welded to the surface of the orthogonal plate 53, and the reinforcing rib 58 fixed to the substrate portion 52 and the orthogonal plate 53 is welded to the back surface (the back surface of the surface facing the support column 11). . The parallel plate 54 is disposed so as to be parallel to the side surface 11b facing the column 11 adjacent to the column 11 among the side surfaces of the column 11 in the Y-axis direction. The parallel plate 54 is provided with a tap hole (not shown) through which a bolt B for pressing the second adjuster plate 56 to the support 11 is inserted. In the present embodiment, the nut member N is provided on the shaft portion of the bolt B to suppress loosening of the bolt due to vibration.

  A distal end portion of the shaft portion of the bolt B is rotatably fixed to the first adjuster plate 55. By rotating the bolt B screwed to the orthogonal plate 53, the first adjuster plate 55 moves relative to the orthogonal plate 53 and can approach and separate from the side surface 11 a of the column 11. The first adjuster plate 55 moves while maintaining a state parallel to both the orthogonal plate 53 and the side surface 11 a of the support column 11, and is crimped to the side surface 11 a of the support column 11.

  A distal end portion of the shaft portion of the bolt B is rotatably fixed to the second adjuster plate 56. By rotating the bolt B screwed to the parallel plate 54, the second adjuster plate 56 moves relative to the parallel plate 54 and can approach and separate from the side surface 11 b of the column 11. The second adjuster plate 56 moves while maintaining a state parallel to both the parallel plate 54 and the side surface 11 b of the support column 11, and is crimped to the side surface 11 b of the support column 11.

  The movable distance of the first adjuster plate 55 and the second adjuster plate 56 is slightly longer than the allowable value (for example, about ± 5 mm) of the construction error of the column 11 at the top of the rack. It can absorb the construction error.

  In the case where there is a concern about loosening of the bolt due to vibration, a double nut may be employed as in the present embodiment, or countermeasures such as employing a spring washer may be taken.

  By providing the above fixing jigs 50 at the four corners of the upper frame 31, the four struts 11, 11,... Are respectively crimped from the inside, so that the rack damping device 10 can be moved in the horizontal direction. regulate.

  As a simpler structure than the fixing jig 50 shown in FIG. 5, a fixing jig 60 as shown in FIG. 6 may be adopted. The fixing jig 60 is different from the fixing jig 50 in the shape of the adjuster plate 65. The shapes of the substrate portion 52, the orthogonal plate 53, and the parallel plate 54 are the same as those of the fixing jig 50 except that the bolt hole and the nut member N are not provided. .

  Two adjuster plates 65 are provided, between the orthogonal plate 53 and the side surface 11a of the column 11 (hereinafter referred to as “gap 63”) and between the parallel plate 54 and the side surface 11b of the column 11 (hereinafter referred to as “gap 63”). The adjuster plate 65 has an L-shaped cross section and is bent at a right angle from the gap 63 or the insertion portion 66 inserted into the gap 64 and the upper end of the insertion portion 66. The insertion portion 66 has a wedge shape whose thickness is gradually reduced from the side of the locking portion 67 toward the distal end of the thin portion and the thick portion of the insertion portion 66. The difference in the thickness dimension is slightly longer than the allowable value (for example, about ± 5 mm) of the construction error of the column 11 at the rack top, and the insertion portion 66 is hit and inserted into the gap 63 or the gap 64. (Plugged That) it is, and push the gap 63 or gaps 64, it is pressed against the side surface 11b of the side surface 11a or struts 11 of the strut 11.

  The locking portion 67 is perpendicular to the outer surface of the insertion portion 66 (the surface that contacts the support column 11). The locking part 67 covers the upper part of the orthogonal plate 53 or the parallel plate 54.

  The adjuster plate 65 is preferably connected to the fixing jig 60 with a wire or the like in order to prevent the adjuster plate 65 from falling.

  According to the rack vibration control device 10 having the above-described configuration, the bottom surface has a flat plate shape. Therefore, the rack vibration control device can be used with a roller conveyor 7 or a chain conveyor, which are existing facilities provided adjacent to the rack 2. 10 can be transported. Furthermore, the rack damping device 10 can be transported by the stacker crane 4 by allowing the fork 4 c of the stacker crane 4 to enter under the bottom plate 45.

  Further, by providing the frame 30 with the notches 46 and 46 to form a claw insertion space into which the forklift claw can be inserted, the frame 30 can be conveyed using a normal forklift to a conveying facility such as the roller conveyor 7.

  As described above, the rack vibration damping device 10 according to the present embodiment easily conveys from the outside of the building of the three-dimensional automatic warehouse 1 to the installation position at the upper part of the rack using the existing conveyance equipment and the three-dimensional automatic warehouse 1. be able to. And since it is not necessary to provide a temporary lifting equipment when transporting the rack damping device 10, the rack damping device 10 can be transported and installed while maintaining the use state of the three-dimensional automatic warehouse 1. .

  On the other hand, the fixing jig 50 includes the adjuster plates (the first adjuster plate 55 and the second adjuster plate 56) that are fixed to the frame 30 and can be moved back and forth with respect to the side surfaces 11a and 11b of the support column 11 of the rack 2. The rack damping device 10 can be fixed to the column 11 without play by absorbing an error in the accuracy of the method of building the column 11 of the rack 2. In addition, the rack damping device 10 can be installed simply by installing the first adjuster plate 55 and the second adjuster plate 56 while the weight is supported by the arms 6. The adjuster plate can be easily moved by simply rotating the bolt B. Furthermore, if the fixing jig 60 is used, the adjuster plate 65 moves relative to the orthogonal plate 53 or the parallel plate 54 and is crimped to the support 11 only by striking and inserting the adjuster plate 65 into the gaps 63 and 64. Installation work becomes even easier. Further, the installation work can be performed without performing processing or welding work on the rack 2 side for installing the rack damping device 10.

  Furthermore, since the frame 30 is directly fixed to the support 11 via the fixing jig 50, the vibration damping force of the movable mass 20 can be directly transmitted to the support 11 without using the arms 6. Can be increased.

  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. For example, in the above embodiment, the rack damping device 10 is installed at the uppermost stage of the rack. However, the rack damping device 10 is not limited to the uppermost stage, and the upper part of the rack is lower than the uppermost stage. Can also obtain a damping effect.

10 Rack damping device 30 Frame 45 Bottom plate 50 Fixing jig 55 First adjuster plate 56 Second adjuster plate 60 Fixing jig 65 Adjuster plate

Claims (5)

A rack damping device provided in a rack for placing a pallet,
A movable mass, a frame, and a fixing jig for fixing the frame to the rack;
The frame is mounted on the pallet mounting portion of the rack, slidably supports the movable mass, and is fixed to the rack column via the fixing jig,
A rack damping device, wherein a bottom plate is provided at a lower portion of the frame. The rack vibration control device according to claim 1, wherein a claw insertion space into which a forklift claw can be inserted is formed in the frame. The fixing jig includes an adjuster plate fixed to the frame,
The rack damping device according to claim 1 or 2, wherein the adjuster plate is movable back and forth with respect to a side surface of the rack column. The said adjuster plate is being fixed via the volt | bolt with respect to the main-body part of the said fixing jig, and it advances / retreats with respect to the side surface of the said support | pillar by rotating the said volt | bolt. Rack damping device. The rack damping device according to claim 3, wherein the adjuster plate is formed of a wedge-shaped plate that is inserted into a gap between a main body portion of the fixing jig and a side surface of the support column.

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