JP2003118819A - Vibration damping rack and rack vibration damping method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve vibration damping property by absorbing vibration energy applied to a rack. SOLUTION: A-frame beams 14 of the rack 2 are parted and connected to each other via a vibration damping joint 20. A lattice 8 and a brace are mounted on a column 6 via a vibration damping joint 40, upper and lower columns 6 are connected via a vibration damping joint 40, and the lower column is mounted on a foundation via a vibration damping joint 50. Furthermore, a back-to-back mating material between rack units 4, 4 is constructed by a vibration damping joint 60. For each of the vibration damping joints, a viscoelastic body is provided between one mounting metal plate and the other mounting metal plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to damping of racks used in automatic warehouses and the like.

[0002]

2. Description of the Related Art Vibration control is an important factor in racks such as automated warehouses. If the vibration can be sufficiently damped, the earthquake resistance can be improved, and the structure can be simplified and the weight can be reduced by thinning the structural members such as the pillars, and the cost of the rack can be reduced. In addition, it is possible to prevent the stored luggage from shifting or falling. However, damping of racks has not been well studied.

[0003]

SUMMARY OF THE INVENTION A basic object of the present invention is to absorb the vibration of a rack by a viscoelastic body to suppress the rack.
(Claims 1 to 9). An additional object of the inventions of claims 2 and 3 is to absorb swinging of the rack in the short side direction. An additional object of the invention of claim 4 is to absorb the swing of the rack by using a lattice material or a breath. An additional object of the invention of claim 5 is to absorb the sway by utilizing the pillar of the rack. An additional object of the inventions of claims 6 to 8 is to provide a concrete structure of the vibration damping joint.

[0004]

According to the present invention, there is provided a vibration damping rack in which structural elements of the rack are connected by a vibration damping joint using a viscoelastic body (claim 1).

Preferably, a damping joint using a viscoelastic body is provided as a member connecting the rack units (claim 2). Particularly preferably, the member is a cross beam that connects the tops of the rack units or a back-to-back member that connects the backs of the rack units (claim 3). Further, preferably, a vibration damping joint using a viscoelastic body for the lattice material or the breath material of the rack is provided (claim 4). Further, preferably, a vibration damping joint using a viscoelastic body is provided between the upper and lower columns of the rack or between the column and the foundation.
(Claim 5).

[0006] Preferably, the vibration damping joint has a viscoelastic body between a first metal plate extending from one end of the joint and a second metal plate extending from the other end. Is interposed (Claim 6). Particularly preferably, means are provided for limiting the relative displacement of the first and second metal plates (claim 7). Further, preferably, n first metal plates and n + 1 second metal plates are provided (n is a natural number of 1 or more), and a viscoelastic body is interposed between these metal plates (claim 8).

In the present invention, a vibration damping joint using a viscoelastic body is provided in the structural element of the rack, and the viscoelastic body is deformed by the vibration of the rack to absorb the vibration energy,
Damping the rack (Claim 9).

[0008]

According to the present invention, since the structural elements of the rack are connected by the vibration damping joint using the viscoelastic body, the vibration energy of the rack is absorbed to improve the earthquake resistance or the structure of the rack. It is possible to reduce the rack cost and improve the storage efficiency by simplifying the members by reducing their diameters and thicknesses. Further, it is possible to prevent the stored luggage from shifting or falling (claims 1 to 8). As the damping joint, in addition to the one using a viscoelastic body, a composite alloy, a magnetic damper, an electromagnetic fluid, a liquid crystal, or the like can be considered, but a viscoelastic body is the most efficient.

As the position where the vibration damping joint is provided, there is, for example, a member for connecting the rack units, which is, for example, a connecting beam for connecting the tops of the rack units to each other,
A back-to-back material that connects between the rack unit and the back of the rack unit. A rack is generally tall and has a large ratio of the long side direction to the short side direction when viewed in a horizontal plane.
It is important to absorb and dissipate the vibration of the rack in the short side direction, because the shake in the short side direction is more remarkable than that in the long side direction. Therefore, for example, by using a vibration damping joint for connecting the rack unit to the rack unit, it is possible to absorb vibration energy at this portion and suppress the vibration.
(Claims 2 and 3).

In addition to this, it is preferable to provide a vibration damping joint on the lattice material or the breath material of the rack. If the vibration damping joint is provided on the lattice material, the vibration energy in the short side direction of the rack can be absorbed, and if it is provided on the brace material, the vibration energy in the long side direction of the rack can be absorbed (claim 4). Further, if a vibration damping joint is provided between the pillars on the upper and lower sides of the rack or between the pillar and the foundation, the vibration of the pillar can be absorbed by the vibration damping joint and the earthquake resistance of the rack can be improved (claim 5). Alternatively, the damping joint may be provided on the horizontal beam of the rack.

The vibration damping joint basically utilizes absorption of vibrational energy by a viscoelastic body, and its structure is such that a first metal plate is extended from one end of the joint and the other is Extend the second metal plate from the end,
By interposing a viscoelastic body between them, a vibration damping joint can be easily constructed (claim 6). When the viscoelastic body alone has a poor attachment strength as a joint, a means for limiting the relative displacement of the first metal plate and the second metal plate is provided to prohibit deformation beyond the allowable range. 7). In order to absorb vibration energy with the viscoelastic body, it is more advantageous to use a plurality of thin viscoelastic bodies than to use one thick viscoelastic body. Therefore, for example, if n first metal plates and n + 1 second metal plates are provided and 2n viscoelastic bodies are interposed between these metal plates, vibration energy can be efficiently absorbed. 8).

According to the rack vibration damping method of the present invention, since the vibration of the rack is absorbed by the viscoelastic body of the vibration damping joint, the vibration resistance of the rack is enhanced, and the weight, diameter and thickness of the rack are reduced. Etc. can be measured. Also,
It is possible to prevent the stored luggage from shifting or falling (claim 9).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 12 show a damping rack of an embodiment and its modification. In these figures, 2 is a damping rack,
Reference numeral 4 denotes a rack unit, and a plurality of rack units 4 are arranged in parallel here, but the rack unit 4 may be composed of only one rack unit 4. 6 is a column using a square steel pipe or the like, 8 is a lattice material that connects between the columns 6 and 6 in the short side direction, and 10 is a traveling space for a stacker crane or the like. In FIG. 2, reference numeral 12 is a breath, which diagonally connects the columns 6 and 6 along the long side direction of the vibration damping rack 2, and 14 is a cross beam, and the rack unit 4,
Connect the tops between 4 Pillar 6, lattice material 8, breath 1
2, the cross beam 14 and the like correspond to structural members, which are made of steel, for example.

Vibration damping joints 20 to 7 using a viscoelastic body
An example of the mounting position of 0 is shown in FIGS. The vibration damping joint 20 between the crossing beams is attached so that the crossing beam 14 is divided at an appropriate position between the rack units 4 and 4 and the divided positions are connected. Vibration control joint 30 for lattice
Is attached between the lattice member 8 and the pillar 6, or the lattice member 8 is divided so that the divided lattice members are connected to each other. The vibration damping joint 40 for the pillar is provided between the upper and lower pillars, and when a plurality of pillars are provided along the vertical direction,
It is preferable to provide the connection portion of the pillar in the high-rise portion. The damping joint 50 for mounting to the foundation is mounted between the column and the foundation. Further, the damping joint 60 as a back-to-back member is attached to a position where the rack units 4 and 4 are back-to-back connected to each other. Vibration damping joint 7 for breath
0 is provided at a position where the breath 12 is attached to the pillar 6, or the breath 12 is divided so that the divided breaths are connected to each other. Although FIG. 1 and FIG. 2 show that many kinds of vibration damping joints 20 to 70 are installed at many places, only one kind of these vibration damping joints may be used, and the number of mounting positions is smaller. You may limit it to.

FIG. 3 shows a vibration damping joint 20 between the cross beams, 21 and 22 are metal plates, and two metal plates 21 sandwich the metal plate 22 via a viscoelastic body 23. Reference numeral 24 denotes a pin, which restricts relative displacement between the metal plates 21 and 22, and a hole larger than the outer diameter of the pin 24 is provided in the central metal plate 22. Board 2
It is arranged that the 1, 2 can be displaced relative to each other. The metal plate 21 corresponds to the first metal plate, and the metal plate 22 corresponds to the second metal plate.

The viscoelastic body 23 is provided, for example, in a layered form. For example, an elastic body having a large loss coefficient, in which carbon black, appropriate ceramic powder, metal powder or the like is mixed to increase the loss coefficient, is used. . Such viscoelastic body 2
3, the force required to deform the viscoelastic body is kx + ηv, where k is the elastic coefficient, η is the viscosity coefficient, x is the displacement, and v is the velocity. Represents the absorption of. Generally, preferable materials for the viscoelastic body are polymers such as rubber and liquid crystal polymer,
Carbon black, ceramics, and fillers such as metal powder are added.

In the case of the vibration damping joint 20 between the cross beams, the vibration damping joint 20 has the metal plates 21, 22 centered on the pin 24 due to the vibration of the rack units 4, 4 in the short side direction.
Oscillate relative to each other, and this oscillation causes the viscoelastic body 23 to deform and changes the vibration energy into heat energy.
The pin 24 may not be provided, and the damping joint 20
May be provided at a position other than the position where the rack units 4 and 4 are connected by a cross beam. For example, it is possible to divide the joint beam between one column and the other column in the short side direction of one rack unit 4 and connect the divided portions to each other.

FIG. 4 shows a vibration damping joint 30 for a lattice. Reference numerals 21 and 22 are the metal plates, and a viscoelastic body 23 is interposed between them, and a pin 24 limits the range of relative displacement. While connecting to each other. The pin 24 may not be provided. The metal plate 22 is a metal plate 31 attached to the pillar 6.
To the vibration damping joint 20 shown in FIG. 3 in other respects. Figure 4
In the above, the vibration damping joint 30 is provided between the column 6 and the lattice material 8. However, the vibration damping joint 30 may be provided at the dividing position by dividing the lattice material 8 into two. Damping joint 30
Absorbs and dissipates the energy of vibration that causes the lattice material 8 to expand and contract in the event of an earthquake.

FIG. 5 shows the vibration damping joint 40 for the pillar. The vibration damping joint 40 is provided between the upper and lower pillars 6 and 6, and is welded to the bottom surface of the vibration damping joint 40 at the upper end of the lower pillar. The joint 40b fixed in place is attached, and the upper pillar 6 is placed in a U-shaped or box-shaped recess provided in the damping joint 40, and the upper pillar and the damping joint 40 are compressed. The viscoelastic body 23 is in contact therewith. The damping joint 40 is arranged so that the long side direction in the horizontal plane is the short side direction of the rack unit so that the frontage of the rack is not narrowed. When a force is applied in the short side direction of the rack unit due to an earthquake or the like, the upper column moves upward with respect to the vibration damping joint 40, and the viscoelastic body 23 absorbs this vibration energy.

FIG. 6 shows a vibration damping joint 4 for a column of a modified example.
5, 41 and 42 are upper and lower metal plates, the lower column is fixed to the metal plate 42 by welding or the like, and the upper column is the metal plate 41.
It is also fixed to. Further, 34 is a fastening portion for mounting while allowing the upper and lower columns 6 and 6 to move in the vertical direction, and these allow horizontal gaps to be created between the metal plates 41 and 42 while allowing them to move horizontally. It is prohibited to move in the direction. 46 is another metal plate, 47 is a member such as a square pipe, and the viscoelastic body 2 is provided between the square pipe 47 and the metal plate 46.
3 and the upper pillar moves upward, the viscoelastic body 23
Vibration energy can be absorbed by. Square pipe 4
7 is used to obtain the thickness of the flange portions of the metal plates 41 and 42.

FIG. 7 shows a vibration damping joint 50 for mounting on a foundation. Reference numeral 51 denotes a receiving portion, which has, for example, a rectangular opening 55 in a plan view, and the viscoelastic body 23 is provided between the column 6 and the receiving portion 51. 52 is a height adjusting member using a screw or the like,
Reference numeral 53 is a mounting portion to the foundation, and 54 is an anchor bolt.

8 and 9 show a vibration damping joint 60 as a back-to-back member. In the vibration damping joint 60, the viscoelastic body 23 is provided between the metal members 61 and 62 in two layers, for example, and the relative displacement between the metal members 61 and 62 is limited by the pin 24.
The pin 24 may not be provided.

It is more efficient to use a large number of viscoelastic bodies, and such a modification is shown as a vibration damping joint 65 in FIG. The metal member 66 is provided with, for example, two metal plates, the metal member 67 is provided with, for example, three metal plates, and a total of four viscoelastic bodies 23 are provided therebetween. In other respects, it is similar to the vibration damping joint 60 of FIG.

FIG. 11 shows a vibration damping joint 70 for attaching the breath 12 to the column 6. 71 and 73 are metal members, the viscoelastic body 23 is interposed between them, and the breath 12 is attached to the vibration damping joint 70 by a cap nut 72.

FIG. 12 shows still another modified example of the vibration damping joint for a pillar. Reference numeral 80 is a vibration damping joint in the shape of a rectangular tube, which is fixed to the lower pillar by fasteners such as bolts and the upper pillar. Is received inside the rectangular tube 80, and is damped by the viscoelastic body 83 provided on the wall surface.

Regarding the relationship between the viscoelastic body and the metal plate in the vibration damping joint, they may be fixed to each other with an adhesive or the like, or the viscoelastic body may be pressed by the metal plate so as to be compressed so that an earthquake occurs. Alternatively, the viscoelastic body may be deformed by friction due to this compressive force.

[Brief description of drawings]

FIG. 1 is a front view schematically showing the configuration of a vibration damping rack of an embodiment.

FIG. 2 is a diagram schematically showing a side surface of the vibration damping rack of the embodiment.

FIG. 3 is a perspective view showing the division of the girder beam and the connection by a vibration damping joint in the vibration damping rack of the embodiment.

FIG. 4 is a plan view of the vibration damping rack of the embodiment with a cutout portion showing the attachment of a lattice to a column by a vibration damping joint.

FIG. 5 is a perspective view showing the connection of the upper and lower pillars by a vibration damping joint in the vibration damping rack of the embodiment.

FIG. 6 is a front view showing a connection between upper and lower columns by a vibration damping joint of a modified example.

FIG. 7 is a diagram showing how the damping rack of the embodiment is attached to the foundation of a column by a damping joint.

FIG. 8 is a diagram showing a connection between rack units by a vibration damping joint as a back-to-back member in the vibration damping rack of the embodiment.

9 is a horizontal sectional view of the vibration damping joint of FIG.

FIG. 10 is a horizontal sectional view showing a modification of the vibration damping joint of FIG.

FIG. 11 is a plan view with partial cutouts showing the attachment of the brace to the pillar by the damping joint in the damping rack of the embodiment.

FIG. 12 is a front view showing a connection between upper and lower columns by a vibration damping joint of another modified example.

[Explanation of symbols]

2 vibration control rack 4 rack units 6 pillars 8 Lattice material 10 running space 12 breath 14 Gassho 20 Damping joint between the joint beams 30 Lattice damping joint Damping joint for 40, 45 columns 50 Damping joint for mounting to foundation 60,65 Damping joint as back-to-back material 70 damping joint for breath 21,22 metal plate 23 Viscoelastic body 24 pin 31 metal plate 32,34 fasteners 41, 42 Metal plate 46 Metal plate 47 square pipe 51 Receiver 52 Height adjustment member 53 Attachment to foundation 61,62 Metal member 66,67 Metal member 71,73 Metal member 72 cap nut 80 damping joint 82 Fastener 83 Viscoelastic body

Claims (9)

[Claims] 1. A vibration damping rack in which structural elements of the rack are connected by a vibration damping joint using a viscoelastic body. 2. The vibration damping rack according to claim 1, wherein a vibration damping joint using a viscoelastic body is provided for a member connecting the rack units. 3. The vibration damping rack according to claim 2, wherein the member is a cross beam that connects the tops of the rack units or a back-to-back member that connects the backs of the rack units. 4. The vibration damping rack according to claim 1, wherein a vibration damping joint using a viscoelastic body is provided for the lattice material or the breath material of the rack. 5. The vibration damping rack according to claim 1, wherein a vibration damping joint using a viscoelastic body is provided between the upper and lower columns of the rack or between the column and the foundation. 6. The damping joint includes a viscoelastic body between a first metal plate extending from one end of the joint and a second metal plate extending from the other end of the joint. The vibration damping rack according to any one of claims 1 to 5, wherein the vibration damping rack is interposed. 7. The vibration damping rack according to claim 6, further comprising means for limiting relative displacement between the first and second metal plates. 8. The first metal plate is n sheets and the second metal plate is n sheets.
The vibration damping rack according to claim 6 or 7, wherein +1 sheet is provided (n is a natural number of 1 or more), and a viscoelastic body is interposed between these metal plates. 9. A rack is characterized in that a vibration damping joint using a viscoelastic body is provided in a structural element of the rack, and the viscoelastic body is deformed by vibration of the rack to absorb vibration energy. Vibration control method.