JP7233280B2 - Rack damping structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration damping structure for a rack that can be installed in a narrower space and that can damp vibrations more effectively.

As a damping structure for racks, for example, Patent Document 1 is known. The object of the "vibration damping structure for a structure" of Patent Document 1 is to provide a damping structure for a structure that can rationally, simply, and effectively damp a structure such as a rack. The fixed side rack fixedly installed on the floor and the fixed side rack have the same height, and can freely move horizontally on the floor in the direction of approaching and separating from the fixed side rack via a horizontal moving means. Both ends are rigidly joined to the supported movable rack, the top of the movable rack and the top of the fixed rack, and the movable rack is horizontal only between the top of the movable rack and the fixed rack. It is provided horizontally along the direction of movement and is configured with a rigid connecting member that transmits force between the movable rack and the fixed rack.

That is, two racks constructed in a multi-tiered high-rise are spaced enough to allow the stacker crane to travel, and are arranged so that the receiving sides of the racks face each other and are rigidly joined at the top. This is the damping structure of the rack.

The two racks are constructed such that one rack (fixed rack) is fixed to a support base, and the other rack (movable rack) is horizontally movable between the movable rack and the support base. constructed through means.

Therefore, the movable rack can move horizontally toward or away from the fixed rack. It has also been suggested to arrange damping means such as a damper in a region outside the rack between the movable rack and the support base.

JP 2015-189536 A

In order for the damping means provided between the movable rack and the supporting base to effectively act as in the rack damping structure of the background art, the movable rack must have high rigidity.

Conventional racks are provided with braces arranged in a vertical plane in a distributed manner from the upper and lower ends of the front end in the front-rear direction, which is the direction in which items are taken in and out of the rack, to the upper and lower ends of the rear end of the rack. . In addition, on the entire surface of the rear end of the rack, which is the non-receiving side, vertical braces are distributed, or long vertical braces are arranged from the two corners at the top to the two corners at the bottom. It is provided diagonally across the part.

When long vertical braces were provided in an oblique direction, the four corners of the rack to which the vertical braces on the non-receiving sides were connected had high rigidity. In this case, the preferred installation positions for effectively acting the damping means provided between the movable rack and the support base are two locations at both corners on the lower end side of the rack.

However, in order to dampen the vibration of the multi-tiered high-rise rack with the damping means provided at two locations, a large-sized damping means is required. Due to the increase in the size of the damping means, the damping means must be installed outside the rack, and there is a problem that a wider occupation area is required to install the rack provided with the damping means.

Instead of providing a long vertical brace in the oblique direction, there is a method of arranging a large number of small vertical braces. It was the same in that it was limited to the position where it was connected at the lower end of the rack.

Since the load on the rack becomes unbalanced depending on the arrangement of the stored items, if the stored items are concentrated in one part, a large horizontal force during an earthquake acts on that part. The vertical in-plane braces on the rear end side of the rack can distribute this horizontal force to some extent, but since the stress is in the out-of-plane direction, they cannot resist large horizontal forces. As a result, there was a problem that a large damping device had to be arranged at a predetermined location in anticipation of the maximum possible load.

SUMMARY OF THE INVENTION The present invention has been devised in view of the conventional problems described above, and it is an object of the present invention to provide a rack vibration damping structure that can be installed in a narrower space and that can damp vibrations more effectively. do.

A vibration damping structure for a rack according to the present invention comprises a plurality of first columns arranged in a first direction at intervals, and a predetermined height between the column bases of the two adjacent first columns. a first column beam portion having a first beam that spans across the first column; A plurality of second columns arranged along a first direction and a second column beam section having a second beam spanned at a predetermined height between the column base sections of two adjacent second columns. and a third beam spanned at a predetermined height between the column base portion of the first column and the column base portion of the second column facing each other in the second direction, and the first column beam and a plurality of braces spanned at a predetermined height between the portion and the second column beam portion, wherein the plurality of first columns and the plurality of second columns are each movable. The first beam-beam portion and the second beam-beam portion provided via bearings have connecting portions to which two of the plurality of braces, which are spanned from different directions, are connected to each other. A damper is interposed between the connecting portion and the installation surface on which the movable bearing is installed.

The rack includes a plurality of intermediate beams vertically spaced apart from the first beam, the second beam, and the third beam. The brace is spanned between the part and the second beam part.

Two of the racks are arranged side by side with an interval in the second direction, and the tops of the two racks are connected to each other, and the plurality of first columns and the plurality of the first columns of one of the two racks are connected to each other. It is characterized in that the second column is provided via a movable support.

The rack is defined by the first beam, the second beam, the third beam and the intermediate beam to form a plurality of storage spaces for storing objects together with the pallet. It is characterized in that it is positioned below the accommodation space in the lower stage.

The movable bearing is a slide bearing.

The movable bearing is a rolling bearing.

The damping structure for a rack according to the present invention can be installed in a narrower space, and can damp vibrations more effectively.

1 is a front view showing a preferred embodiment of a damping structure for a rack according to the present invention; FIG. FIG. 2 is a side view of the damping structure for the rack shown in FIG. 1 as viewed from the fixed rack side; FIG. 2 is an enlarged perspective view of a main part showing a housing part provided in a rack to which the rack damping structure shown in FIG. 1 is applied; FIG. 2 is a plan view showing the arrangement of a horizontal brace (lowermost brace), a linear rail, and an oil damper that constitute the damping structure of the rack shown in FIG. 1 ; FIG. 5A is an explanatory diagram for explaining the arrangement of linear rails and oil dampers that constitute the damping structure of the rack shown in FIG. 1, FIG. 5(b) is a cross-sectional view taken along line BB in FIG. FIG. 2 is an enlarged perspective view of a main part when sliding bearings are used in place of the linear rails of the damping structure of the rack shown in FIG. 1; FIG. 5 is a plan view showing a modification of the arrangement shown in FIG. 4;

Hereinafter, a rack damping structure according to the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, a load or the like is taken in or taken out by a stacker crane provided to be free to travel. An example of a rack provided long along the running direction of a running stacker crane (hereinafter referred to as the running direction) will be described below.

As shown in FIGS. 1 to 3, a rack 1 equipped with the damping structure of the present embodiment is placed on a pallet 2 (see FIG. 3) by a stacker crane (not shown) and transported by a load 3 (FIG. 3). , etc. are provided with a plurality of accommodation spaces S that are taken in and out in the depth direction (second direction) of the rack 1 orthogonal to the running direction (first direction) of the stacker crane.

In the rack 1, such a plurality of accommodation spaces S are arranged in a row in the traveling direction and arranged in a plurality of stages in the vertical direction. The entire rack 1 is long in the running direction and high in height, but the width in the depth direction is extremely narrow compared to the width in the running direction and the height direction. Therefore, when an earthquake occurs, this rack 1 shakes more greatly in the depth direction.

In the following description, the side on which the load 3 is put in and taken out is defined as the front side, and the opposite side is defined as the depth side.

As shown in FIG. 1, the racks 1 elongated in the travel direction are provided in pairs with the travel region R of the stacker crane interposed therebetween. Therefore, the front sides of the two racks 1 forming a pair face each other. Each rack 1 is composed of a plurality of pillars and a plurality of beams.

The rack 1 includes a front side column beam portion 4 arranged on the traveling region R side, a back side column beam portion 5 arranged on the back side, and a front side column beam portion 4 and a back side column beam portion 5. and a plurality of connecting beams 6 as third beams spanned between.

The front side pillars and beams 4 are arranged between a plurality of front side pillars 40 as first pillars spaced apart from each other on the front side and arranged along the traveling direction, and two adjacent front side pillars 40. It is composed of a plurality of front side beams 41 that are stretched over and arranged at intervals in the vertical direction.

Of the plurality of front side beams 41, the lowest front side beam 41 spanned over the column base portion 40a of the front side column 40 corresponds to the first beam (see FIG. 5).

As shown in FIG. 3, the back side column beam portion 5 includes a plurality of back side columns 50 as second columns spaced apart from each other on the back side and arranged along the traveling direction, and two adjacent columns. It is composed of a plurality of back-side beams 51 that span between back-side pillars 50 and are spaced apart from each other in the vertical direction.

Of the plurality of back-side beams 51, the bottom-most back-side beam 51 spanned over the column base portion 50a of the back-side column 50 corresponds to the second beam.

The plurality of front side pillars 40 and the plurality of back side pillars 50 are arranged at equal intervals in the traveling direction, and the front side pillar beam portion 4 and the back side pillar beam portion 5 are arranged to face each other in the depth direction. . The plurality of front-side beams 41, the plurality of back-side beams 51, and the plurality of connecting beams 6 are each provided at the same intervals in the vertical direction, and arranged at the same height in multiple locations in the vertical direction.

Each space surrounded by a plane that connects two adjacent front and back columns 40 and 50 and two vertically adjacent front and back beams 41, 51 and connecting beams 6 is the cargo 3. is formed as an accommodation space S of. That is, each rack 1 is provided with a plurality of accommodation spaces S in the traveling direction and the vertical direction.

Each front side column 40 and each back side column 50 are provided with support bars 40b, 50b which are positioned on the lower end side of each storage space S and protrude into two storage spaces S adjacent to each other in the traveling direction. . Between the support bars 40b, 50b provided on the front side pillar 40 and the back side pillar 50 facing each other in the depth direction, the bracket 7 on which the pallet 2 is placed is stretched on the storage space S side of each. there is

Therefore, at the lower end side of each accommodation space S, a bracket 7 extends over support bars 40b, 50b provided on the front side column 40 and the back side column 50, respectively, which are adjacent in the traveling direction. there is

Each arm 7 is provided at a position higher than the lower front side beam 41, the back side beam 51 and the two connecting beams 6 forming the housing space S from which the arm 7 protrudes.

As shown in FIGS. 2 and 3, on the back surface of each rack 1, the corners of the back pillar 20 and the back beam 51 are arranged diagonally with respect to each accommodation space S. A brace 52 in the vertical plane, which serves as an earthquake-resistant element, is arranged in connection with the . Instead of individually arranging the braces 52 in the vertical plane in each accommodation space S, as shown by the phantom lines in FIG. It may be arranged obliquely across the two corners of the lower end on the far side of the .

Also between two connecting beams 6 adjacent in the vertical direction, there is a front end side of the upper connecting beam 6 and a rear end side of the lower connecting beam 6, or a rear end side of the upper connecting beam 6. and the front end side of the connecting beam 6 on the lower side, a vertical in-plane brace 53 is arranged obliquely.

One of the two racks 1 provided to form a pair is constructed by fixing a front side pillar 40 and a back side pillar 50 to a floor surface 8 as an installation surface on which the rack 1 is installed. On the other hand, the front side pillar 40 and the back side pillar 50 are constructed between the floor surface 8 and the movable support.

The movable bearing is a linear rail 9 forming a rolling bearing. The linear rails 9 are arranged so as to allow the front side column 40 and the back side column 50 to move in the depth direction.

In the following description, the rack 1 fixed to the floor surface 8 is referred to as the fixed rack 1, and the rack 1 with the linear rails 9 interposed is referred to as the movable rack 1.

As shown in FIG. 1, in order to match the heights of the storage spaces S of the fixed rack 1 and the movable rack 1, the linear rails 9 installed on the movable rack 1 are arranged to extend from the floor surface 8 to the lowest storage space. It is assumed that the height can be accommodated between the lower end of S.

Only the top portions 1a of the fixed rack 1 and the movable rack 1 positioned at the same height are connected by a rigid connecting member 1b.

Further, as shown in FIG. 4, the column bases 40a, 50a of the front side column 40 and the back side column 50 of each rack 1 are provided with a bottom front side beam (first beam) 41 and a back side beam (second 2 beams) 51 and two connecting beams (third beams) 6, and a brace 10 in a horizontal plane (hereinafter referred to as the lowermost brace) 10 is provided substantially horizontally and obliquely. Here, the height at which the bottom front beam 41, the bottom beam 51, and the two connecting beams 6 are provided corresponds to a predetermined height.

The lowermost brace 10 of the movable rack 1 has rectangular regions formed by the lower front side beam 41, the rear side beam 51, and the two connecting beams 6, which form the lowermost accommodation space S of the movable rack 1. One each is arranged in K.

As shown in FIG. 4, each of the lowermost braces 10 is connected to the front side pillar 40 and the back side pillar 50 in each region K surrounded by the column bases 40a and 50a of the front side pillar 40 and the back side pillar 50. It is slanted between the In addition, the lowermost braces 10 provided in adjacent rectangular regions K are arranged so that their inclination directions are different from each other.

As a result, connecting portions 40c and 50c to which the two lowermost braces 10 are connected from different directions are connected to the front side column 40 and the back side column 50 to which the connecting beams 6 are connected. The side pillars 40 and the back side pillars 50 are alternately arranged.

An oil damper 11, which is an example of a damper, is interposed between the connecting portions 40c and 50c and the floor surface 8 below the two lower connecting beams 6 forming the lowermost accommodation space S. It is The oil damper 11 is arranged so as to apply a damping force to the moving direction permitted by the linear rail 9 .

In this embodiment, the predetermined height at which the lowermost front side beam 41, the farthest side beam 51 and the two connecting beams 6 are provided is such that the oil damper 11 can be provided under the connecting beams 6. Any height can be set.

As shown in FIG. 5, the oil damper 11 is arranged along the depth direction and provided between the front side column 40 and the back side column 50, and one end thereof is connected to the connecting portions 40c and 50c. , the other end is connected to a base 12 provided on the floor surface 8 .

In the oil dampers 11 that are adjacent to each other in the running direction, one end connected to the connecting portions 40c and 50c and the other end connected to the base 12 are oriented in opposite directions on the front side and the back side in the depth direction. It is provided to be placed in the Both ends of the oil damper 11 are attached to the column bases 40a and 50a and the base 12 so as to be rotatable about an axis along the vertical direction.

According to the damping structure of the rack of the present embodiment, the connecting portions 40c and 50c of the lowermost brace 10 interposed between the oil damper 11 and the floor surface 8 are connected to the column base portion 40a of the front side column 40 and the rear side column. The front side beam 41, the back side beam 51, and the connecting beam 6, which are spanned between the column base portion 50a of the side pillar 50, are spanned at the same height, and are spanned from different oblique directions. Since the connection portions 40c and 50c to which the lowermost brace 10 is connected, the rigidity of the movable rack 1 is particularly high and the portion is difficult to deform.

Therefore, when the oil damper 11 acts between the floor surface 8 and the connecting portions 40c and 50c, the movable rack 1 is less likely to deform, so that when an earthquake is input, the damping force of the oil damper 11 can be efficiently applied. can work.

In addition, since a plurality of connecting portions 40c, 50c to which the lowermost brace 10 is connected are provided in one movable rack 1, more oil is stored between each connecting portion 40c, 50c and the floor surface 8. A damper 11 may be provided. In other words, the oil damper 11 does not have to be connected to all the connecting portions 40c, 50c.

A small oil damper 11 can be used by evenly distributing the seismic energy input to the movable rack 1 to more oil dampers 11 for damping. If the oil damper 11 is small, it can be housed at a lower predetermined height, and the oil damper 11 can be arranged within the area occupied by the movable rack 1, that is, within the region K.

Therefore, it is possible to form the movable rack 1 having a narrow depth provided with the oil damper 11, and to construct a rack vibration damping structure capable of damping vibrations more efficiently.

In addition, by connecting the top 1a of the movable rack 1 provided via the linear rail 9 and the top 1a of the fixed rack 1 fixed to the floor surface 8, the period of the structure can be reduced to that of the seismic motion. The period can be made longer than the period, and the vibration acceleration, interlayer shear force, and displacement (amplitude) of the structure can be rationally and efficiently reduced.

3 and 5, the oil damper 11 is provided below the lowermost accommodation space S of the movable rack 1 (and therefore below the bracket 7 provided in the lowermost accommodation space S). Therefore, the oil damper 11 does not interfere when the pallet 2 is placed on the bracket 7, and the luggage 3 can be accommodated up to the lowest stage, so that the entire movable rack 1 can be effectively used. can. Furthermore, if a sufficiently small damper is used, it can be accommodated in the space under the bracket 7, which is not used in a general automatic rack. It can be a seismic structure.

Since the linear rails 9 are interposed under the front side column 40 and the back side column 50 of the movable rack 1, the movable rack 1 can be moved smoothly, and the movable rack 1 can be input from the floor surface 8. The period can be reliably made longer than the period of seismic motion, and excellent vibration damping action can be ensured.

Since the linear rail 9 restricts the upward movement of the movable rack 1, even if a force acts in a direction to push up the movable rack 1, the movable rack 1 can be prevented from being lifted.

In the above embodiment, the damper is the oil damper 11, but the damper is not limited to this, and has a function of damping vibration energy, such as a viscous damper and a viscoelastic damper, and has a front side beam portion 4 and a back side beam portion. 5 and below the lowermost front side beam 41, the rear side beam 51 and the connecting beam 6, any type may be used.

In the above embodiment, the horizontal brace (lowermost brace) 10 is provided only at the connecting portions 40c, 50c of the front side beam 41, the far side beam 51, and the connecting beam 6 located at the bottom of the movable rack 1. Although explained, it is not limited to this.

For example, the lowermost brace 10 is attached to the connecting portion of the front side beam 41, the back side beam 51, and the connecting beam 6 as a plurality of intermediate beams provided at predetermined intervals upward from the connecting portions 40c and 50c. Additional in-plane braces may be provided in a similar manner. In this case, the movable rack 1 can increase the rigidity of not only the column bases 40a and 50a but also the movable rack 1 as a whole.

Therefore, when the movable rack 1 supported by the linear rails 9 moves due to an input earthquake, it is possible to prevent the movable rack 1 itself from bending and to prevent the load 3 from falling. .

In the above embodiment, the linear rails 9 as rolling bearings are interposed under the front side column 40 and the back side column 50 of the movable rack 1, but the movable bearings are not limited to rolling bearings. do not have.

For example, as shown in FIG. 6, a sheet-like sliding material 13 is provided on the lower surfaces 40d and 50d of the front side pillar 40 and the far side pillar 50 to face the lower surfaces 40d and 50d of the front side pillar 40 and the far side pillar 50. A receiving plate 14 elongated in the depth direction may be provided on the floor surface 8, and a slide bearing 16 having a sliding material 13 abutted on the receiving plate 14 may be provided.

In this case, the edge of the receiving plate 14 along the depth direction is provided with a raised portion 14a raised above the receiving plate 14, and the moving direction of the front side column 40 and the back side column 50 is restricted only in the depth direction. preferably.

The rising portions 14a may be provided on both edges of each receiving plate 14, or may be provided on only one edge different from each other between the receiving plates 14 of the slide bearings 16 adjacent to each other in the running direction.

By providing the mounting surface facing portion 14b that is bent toward the side facing the receiving plate 14 at the upper end of the rising portion 14a, it is possible to prevent the front side column 40 and the rear side column 50 from floating and coming off the receiving plate 14. can.

A sliding member 15 is provided on the surface of the mounting surface facing portion 14b facing the receiving plate 14, and a portion of the front side column 40 and the rear side column 50 facing the sliding member 15 of the mounting surface facing portion 14b is provided. , a sliding material 13 may be further provided.

In the above embodiment, an example in which the oil dampers 11 are provided between the connecting portions 40c, 50c and the floor surface 8 has been described. It is sufficient if it is provided.

Further, in the above example, the connecting portions 40c and 50c are set at two oblique corners of the rectangular region K, and both ends of the lowermost brace 10 are provided obliquely to these. As shown in FIG. 7, the connection portions 40c and 50c are set at the center of the front side beam 41 and the back side beam 51, that is, the connection portion 50c is set avoiding the joint position of the back side beam 51. (Although not shown, in the case of the front side beam 41, the connection portion 40c is also set avoiding the joint position), two lowermost braces 10 are arranged in each region K in a V shape. You may do so.

With such a configuration, the length limitation imposed by the front side pillar 40 and the back side pillar 50 and the height limitation imposed by the connecting beam 6 are alleviated, so a large damper can be provided.

1 rack 1a top of rack 2 pallet 3 load 4 front side column and beam 5 back side column and beam 6 connecting beam 7 bracket 8 floor surface 9 linear rail 10 horizontal brace (bottom brace)
11 Oil damper 16 Sliding bearing 40 Front side column 40a Front side column base 40c, 50c Connecting section 41 Front side beam 50 Back side column 50a Back side column base 51 Back side beam 52, 53 Brace in vertical plane S accommodation space

Claims (6)

It has a plurality of first pillars arranged in a first direction at intervals, and a first beam spanning between the column bases of two adjacent first pillars at a predetermined height. a first column beam portion;
A plurality of second pillars arranged along the first direction at positions opposed to each of the plurality of first pillars and spaced apart in a second direction intersecting the first direction and adjacent to each other a second beam-beam portion having a second beam spanned at a predetermined height between the column base portions of the two second columns;
a third beam spanned at a predetermined height between the column base of the first column and the column base of the second column facing each other in the second direction;
A rack having a plurality of braces spanning a predetermined height between the first column beam portion and the second column beam portion,
The plurality of first pillars and the plurality of second pillars are each provided via a movable support,
The first column beam portion and the second column beam portion have a connection portion to which two of the plurality of braces that are spanned from different directions are connected,
A damping structure for a rack, wherein a damper is interposed between the connecting portion and an installation surface on which the movable bearing is installed. the rack includes a plurality of intermediate beams vertically spaced apart from the first beam, the second beam, and the third beam;
2. The rack damping structure according to claim 1, wherein the brace is spanned between the first column beam portion and the second column beam portion at the height of the intermediate beam. Two of the racks are arranged side by side with an interval in the second direction, and the tops of the racks are connected to each other,
3. The rack according to claim 1, wherein the plurality of first columns and the plurality of second columns of one of the two racks are provided via movable supports. damping structure. In the rack, a plurality of storage spaces are defined by the first beam, the second beam, the third beam, and the intermediate beam to store objects together with the pallet, and
4. The rack vibration damping structure according to claim 2, wherein the damper is positioned below the accommodation space of the lowest stage. 5. The rack vibration damping structure according to claim 1, wherein the movable bearing is a slide bearing. 5. The rack vibration damping structure according to claim 1, wherein the movable bearing is a rolling bearing.

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