Storage system

Abstract

A storage system is provided that includes a storage grid structure including a storage column profile defining a plurality of storage columns, each storage column profile having an upper end and a lower end, and a plurality of remotely operated storage bin handling vehicles, the storage grid structure including a plurality of storage column profiles defining a plurality of storage columns, each storage column profile having an upper end and a lower end, the storage column profiles are connected to each other at their upper ends by means of guide rails so as to form a horizontal guide rail grid, and wherein the storage grid structure is characterized by having a grid support comprising a plurality of bottom gussets, each bottom gusset includes a vertical flange connected to a storage column profile, a horizontal flange bolted to a floor on which a storage grid is disposed, and a web interconnecting these flanges, each flange including a first end and a second end, the first end is disposed closer to the lower end of the connecting vertical flange of the storage column profile than the second end, and the web has a recess disposed between the first ends of the flanges.

Description

[0001] This application is a divisional application, the application number of the parent application is 202080033154.4 (international application number is PCT / EP2020 / 055961), the application date is March 6, 2020, and the name of the invention is “Storage System”. Technical Field

[0002] The present invention relates to the field of automatic storage systems, and more particularly to an earthquake-resistant storage system. Background Art

[0003] An automated storage system known to the applicant is an automated storage system comprising a three-dimensional storage grid structure in which storage boxes / containers are stacked on top of each other to a certain height. Figure 1 Such a prior art system is shown in .

[0004] This storage system is disclosed in detail in, for example, NO 317366, WO 2014 / 090684 A1, and WO 2015 / 193278 A1.

[0005] The storage system 10 includes a grid structure 20 (see Figure 2 ), the grid structure is made up of aluminium profiles / columns 1 interconnected by top rails 5. These profiles define a plurality of storage columns 2 in which storage boxes 30 can be stacked vertically on top of each other.

[0006] Figure 3 shows a cross-sectional view of a prior art profile 1, and Figure 4 A storage row 2 for accommodating a stack of storage boxes 30 is shown in cross section.

[0007] A number of remotely operated vehicles 40 or robots are arranged on the top rails 5 and can move horizontally across the top of the storage grid.

[0008] Each vehicle is equipped with a lifting device for picking up, carrying and placing the storage boxes 30 stored in the storage grid.

[0009] The system also includes a picking and / or supply station 60 at which one or more product items are picked from the storage bin 30 or one or more product items are placed into the storage bin 30 .

[0010] When product items stored in storage boxes are to be picked from the storage grid, the robot is arranged to pick up the storage box containing the product type and then transport the storage box to the box elevator 50. The box elevator transports the storage box to the picking and / or supply station 60, where the items of the product type are removed from the storage box. The storage box with the remaining product items is then returned to the storage grid by the box elevator and the robot. Figure 1 The picking and / or supply station 60 shown only schematically shows a simple table on which the storage boxes are arranged.

[0011] The same process is used to supply product items into the storage grid. First, the items are supplied into the storage bins at the picking and / or supply station. Then, the bin lifter lifts the storage bins up to the upper level where the robot delivers the storage bins to their correct location within the storage grid.

[0012] The storage control and communication system is used to monitor inventory, track the location of corresponding storage boxes (within the storage grid and / or during transportation), the contents of each storage box, etc. In addition, the storage control and communication system may also include system communications or may be configured to communicate with a control system for controlling the robot to pick up the required storage box without colliding with other robots and deliver the storage box to the required location at the required time.

[0013] To ensure that the stability of the grid structure 20 is sufficient, prior art storage systems rely on auxiliary grid support structures (not shown) arranged at least partially along the perimeter of the grid. The need to have an auxiliary grid support structure is disadvantageous for a number of reasons. The support structure occupies space / area that could otherwise be utilized by the storage grid, i.e. the support structure prevents optimal use of the available space / area for storage; the need for a support structure may serve to limit the available options for positioning the storage system, i.e. the support structure may prevent optimal positioning of the storage system because the auxiliary grid support structure typically needs to be connected to surrounding structures, such as interior walls of a building; and the need for a support structure is not cost-effective. Furthermore, and more importantly in certain geographic areas, the walls of the building supporting the grid structure may be exposed to additional unforeseen and harmful loads in the event of exposure to high lateral loads due to, for example, earthquakes.

[0014] In view of the prior art, the object of the present invention is to provide a storage system having a storage grid structure that does not rely on auxiliary grid support structures, that is, the object of the present invention is to provide a support-free storage grid or at least a storage grid that requires less auxiliary grid support structures. In particular, the object of the present invention is to provide a seismic storage system having a storage grid structure that can resist the forces caused by earthquakes. Summary of the invention

[0015] The present invention is defined by the appended claims and the following:

[0016] In a first aspect, the present invention provides a storage system comprising a storage grid structure and a plurality of remotely operated storage box handling vehicles, the storage grid structure comprising vertical storage row profiles defining a plurality of storage rows in which storage boxes can be stored on top of each other in a vertical stack, each storage row profile having an upper end and a lower end, and the storage row profiles being interconnected at their upper ends by rails to form a horizontal rail grid on which the box handling vehicles can move in two perpendicular directions, wherein:

[0017] The storage grid structure is characterized by having a grid support, which includes a plurality of bottom angle brackets, each of which includes a vertical flange connected to a storage row profile, a horizontal flange connected to a floor on which the storage grid is arranged by bolts, and a web connecting these flanges to each other, each flange including a first end and a second end, wherein the first end is arranged to be closer to the lower end of the storage row profile to which the vertical flange is connected than the second end, and the web has a recess arranged between the first ends of the flanges.

[0018] The storage system may also be referred to as a seismic resistant or reinforced storage system, or alternatively as a storage system including a seismic resistant or reinforced storage grid structure.

[0019] The web is preferably vertical, and each of the vertical flanges and the horizontal flanges may be arranged in a respective plane perpendicular to the web.

[0020] In an embodiment of the storage system, the lower end of each storage row profile is arranged on a leveling foot comprising a horizontally movable leveling device, which can extend horizontally beyond the transverse cross-section of the storage row profile, and the recess of the web is sized to accommodate the leveling device.

[0021] In other words, the recess of the web is arranged to accommodate a portion or section of the levelling device extending transversely beyond the cross section of the storage row profile.

[0022] The recess of the web may be defined facing both the floor and the storage row profile to which the bottom angle bracket is connected.

[0023] The recess has an upper level or edge that coincides with the level of the first end of the vertical flange.

[0024] In an embodiment of the storage system, the recess of the web is higher than the leveling device and wider than the maximum length that the leveling device can extend beyond the transverse section of the storage row profile during use. In other words, the recess can extend to a level higher than the upper level of the leveling device.

[0025] In an embodiment of the storage system, the first end of the vertical flange is located at or above the level of the lower end of the storage row profile.

[0026] In an embodiment of the storage system, the horizontal flange, ie the surface of the flange facing the floor, is at the same level as the floor or at the same level as the upper level of a grid guide rail arranged on the floor.

[0027] In an embodiment of the storage system, each flange is connected to the storage row profile by at least a first bolt and a second bolt, wherein the first bolt is arranged closer to the respective first end than the second bolt.

[0028] In an embodiment of the storage system, the web comprises an inclined upper edge extending between the second ends of the flanges.

[0029] In an embodiment of the storage system, the width of the horizontal flange is close to the width of the vertical flange.

[0030] In an embodiment of the storage system, the maximum width of the bottom angle bracket is equal to the width of the vertical flange.

[0031] In an embodiment of the storage system, at least one of the storage row profiles is connected with two bottom angle brackets arranged on opposite sides of the storage row profile.

[0032] In an embodiment of the storage system, at least one storage row profile is connected to four bottom angle brackets, each bottom angle bracket being staggered at 90 degrees relative to an adjacent bottom angle bracket.

[0033] In an embodiment of the storage system, the cross-section of each storage row profile includes a hollow center section and four corner sections, each corner section includes two vertical box guide plates for accommodating the corners of the storage box, and the width of the vertical flange enables it to be connected to the center section without intersecting the plane of the adjacent box guide plates, so that the bottom angle bracket can be connected to the storage row profile without interfering with the storage box, wherein the corners of the storage box are accommodated by the corner sections including the adjacent box guide plates.

[0034] In an embodiment of the storage system, the vertical flange is arranged in a recess of a storage row profile to which it is connected.

[0035] In an embodiment of the storage system, the vertical flange is directly connected to the central section of the storage row profile.

[0036] In an embodiment of the storage system, such two box guide plates are parallel and extend in the same direction, thereby forming a recess defined by the two box guide plates and the outer surface of the center section, and the recess has a width suitable for accommodating the vertical flange, wherein such two box guide plates refer to one box guide plate for each of the two corner sections.

[0037] In an embodiment, the storage system may include a plurality of rail angle brackets connecting the storage row profile to the rail, each rail angle bracket including a vertical flange connected to the storage row profile and a horizontal flange connected to the rail arranged at an upper end of the storage row profile.

[0038] In an embodiment of the storage system, the maximum width of the vertical flanges and the horizontal flanges of the guide angle bracket is equal to the width of the recess of the storage row profile.

[0039] In an embodiment, the storage system may include a plurality of support columns arranged between at least some adjacent storage row profiles, each support column having a maximum width equal to the width of a recess of the storage row profile, such that the support column may be connected to a central section of an adjacent storage row profile without intersecting the plane of an adjacent box guide plate.

[0040] In other words, the support column is connected to an adjacent storage row profile without extending into the storage row, wherein the adjacent storage row profile is part of the storage row.

[0041] In an embodiment of the storage system, the support columns include vertically inclined support columns, horizontal support columns, or a combination thereof.

[0042] In an embodiment of the storage system, the support columns are riveted to the central section.

[0043] In a second aspect, the invention provides a method for seismic reinforcement of a storage grid structure of a storage system, the storage grid structure being arranged on a floor and comprising vertical storage row profiles defining a plurality of storage rows in which storage boxes can be stored on top of each other in a vertical stack, each storage row profile having an upper end and a lower end, and the storage row profiles being interconnected at their upper ends by rails to form a horizontal rail grid on which box handling vehicles can move in two perpendicular directions, wherein the method comprises the following steps:

[0044] Step a) connecting a bottom angle bracket to the storage row profile and the floor, the bottom angle bracket comprising a vertical flange for connecting to the storage row profile, a horizontal flange for connecting to the floor, and a web connecting the flanges to each other, each flange comprising a first end and a second end, such that the first end is closer to the lower end of the connecting vertical flange of the storage row profile than the second end; and

[0045] Step b) Repeat step a) until a plurality of storage row profiles are connected with bottom angle brackets and the storage grid structure has sufficient resistance to lateral forces.

[0046] In an embodiment of the method, step b) is such that the bottom angle brackets are arranged in four different directions staggered at 90 degrees.

[0047] In an embodiment, the horizontal flange of each bottom angle bracket is connected to the floor by using bolts, preferably the floor is a concrete floor and each bolt has a concrete anchor.

[0048] In an embodiment, the method comprises the step of arranging a rail angle bracket to connect the storage profile column to the rail.

[0049] In an embodiment, the method comprises the step of providing support columns to connect at least some adjacent storage row profiles.

[0050] The method may further include any one of the technical features defined in the embodiments of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Embodiments of the present invention will now be described in more detail, by way of example only, and with reference to the following drawings:

[0052] Figure 1 is a perspective view of a prior art storage system.

[0053] Figure 2 yes Figure 1 A perspective view of a grid structure of a prior art storage system.

[0054] Figure 3 It is a cross-sectional view of a storage column profile in the prior art.

[0055] Figure 4 By Figure 3 A cross-sectional view of a prior art storage row consisting of four storage row profiles is shown.

[0056] Figure 5 is a perspective view of an exemplary storage grid structure for a storage system according to the present invention.

[0057] Figure 6 and Figure 7 yes Figure 5 Detail of the storage grid structure in A. Perspective view.

[0058] Figure 8 yes Figure 5 A perspective view of the bottom angle bracket of the storage grid structure in FIG. Figure 7 Details of B.

[0059] Fig. 9 is a top view of a cross section of a storage row profile featuring four bottom angle brackets.

[0060] Fig.10 and Fig.11 yes Figure 5 A perspective view of a storage grid structure detail in FIG. 1 showing the guide rail angle brackets, Fig.11 Shows Fig.10 Details of C.

[0061] Fig.12 and Fig.13 yes Figure 5 A perspective view of a detail of the storage grid structure in FIG. 1 , showing the support columns. DETAILED DESCRIPTION

[0062] As mentioned above, since the grid structure itself is not stable enough for forces with a large horizontal component (i.e., lateral forces), Figure 1 The prior art storage system shown relies on having an auxiliary grid support structure (not shown). Such forces may be caused by the movement and acceleration of a remotely operated vehicle 40 or robot arranged on the grid of rails 5 located on top of the grid structure, and may be caused by external circumstances such as earthquakes. In the event of an earthquake, the grid structure will also be exposed to vertical forces via the floor on which it is arranged.

[0063] Figure 1 The grid structure 20 of the prior art storage system in FIG. 1 is composed of a plurality of vertical profiles 1 (i.e. storage row profiles) interconnected at their top ends 4 by rails 5 (see FIG. 2 ). Figure 3 ). Four profiles 1 form a storage row 2 in which a plurality of storage boxes can be stacked. The profile 1 is characterized by a cross-section having a hollow central section 7 and four corner sections 8, wherein each corner section includes two vertical box guide plates 9. The two vertical box guide plates 9 are arranged to accommodate a corner 11 of a storage box 30 (or a corner of a stack of storage boxes). In other words, each corner section 8 defines two sides of a roughly triangular area (or a triangular space based on the longitudinal dimension of the profile) that can accommodate a storage box corner 11 (see Figure 4 , wherein the storage boxes are represented by dashed squares). The corner sections 8 are arranged uniformly around the central section 7 so that a plurality of profiles can provide a plurality of adjacent storage rows 2, wherein each profile can be common to up to four individual storage rows. A group of two parallel box guide plates 9 belonging to two adjacent corner sections 8 defines four recesses 19, each of which has a width W2.

[0064] exist Figure 4, a cross-section of a storage row 2 consisting of four prior art profiles 1 is shown. The cross-section of the profile is constant over the entire length of the profile. The horizontal periphery of a storage box 30 with four corners 11 is shown to illustrate how (one or a stack of) storage boxes are arranged in the storage row 2. Four corner sections 8 (one corner section from one of the four profiles 1) ensure that the storage box 30 introduced into the storage row 2 is guided to the correct position relative to any storage boxes already present in the storage row and to the stacks of storage boxes in the surrounding storage rows.

[0065] exist Figure 5 An exemplary storage grid structure 20 according to the present invention is shown in FIG. Figure 1 In contrast to the prior art storage grid structures in the exemplary storage grid structure, the exemplary storage grid structure may include different types of grid support elements 6, 27, 31a, 31b to provide the grid structure with increased resistance to lateral forces. It should be noted that the type of grid support elements used and their number and position within the storage grid structure will vary depending on the requirements for the lateral and vertical forces to be withstood by the storage grid structure. For example, in the case of earthquake resistance, all types of grid support elements described below may be required. The various grid support elements are described in more detail below.

[0066] exist Figures 6 to 9 2 shows an exemplary first grid support element 6 of an exemplary storage grid 20. The first grid support element is a bottom angle bracket 6, which is arranged to connect the storage row profile 1 to the floor 16 on which the storage grid structure is arranged. The floor 16 is the floor of the building that accommodates the storage system. Each bottom angle bracket 6 comprises a vertical flange 12 connected to the central section 7 of the storage row profile 1, a horizontal flange 13 connected to the floor 16, and a web 24 that connects the flanges 12, 13 to each other. Each of the flanges comprises a first end 14, 15 and a second end 17, 18, wherein the first end is arranged closer to the lower end 11 of the storage row profile than the second end, to which the vertical flange 12 is connected. In order to allow the vertical flange to be connected to the central section of the storage row profile, the width W1 of the vertical flange 12 is smaller than the distance W2 between two parallel box guide plates 9. Furthermore, the maximum width of the bottom angle bracket is equal to the distance W2, which ensures that the bottom angle bracket does not extend into the space of the storage row. Thereby, the storage grid structure can be supported by the bottom angle brackets without interfering with stacks of storage boxes arranged in a storage row.The bottom angle brackets are preferably made of steel.

[0067] The storage grid structure includes a horizontal grid of guide rails 25 (i.e., grid guide rails). The function of the guide rails is to facilitate accurate positioning of the storage row profiles. In an exemplary embodiment, the bottom angle brackets are connected to the floor via through holes (not shown) in the guide rails. The vertical flanges and horizontal flanges can be connected to the storage row profiles and the floor by using suitable bolts 32, 33. The bolts 32 connecting the vertical flanges to the storage row profiles are typically through bolts and can be used to connect two bottom angle brackets connected at opposite sides of the storage row profile. In alternative embodiments, the vertical flanges can also be riveted to the storage row profiles. The bolts 33 connecting the bottom angle brackets 6 to the floor 16 can be any type of bolt suitable for the material or construction of the specific floor on which the storage grid structure is arranged, for example, bolts with concrete anchors.

[0068] Having the bottom angle bracket 6 connected to the floor 16 and the storage row profiles is very advantageous in terms of the movement of the storage row profiles, and thus the movement of the storage grid structure relative to the floor in both the lateral and vertical directions is restricted. In the event of an earthquake, it is believed that having the storage grid structure follow the movement of the floor 6 at least minimizes potential damage to the storage system. In addition, having the storage row profiles connected to the floor also prevents them from moving relative to each other. If the profiles of the storage row were able to move relative to each other during an earthquake, even a relatively weak earthquake would result in many containers stacked in the storage row being stuck. Due to the interconnection of the different elements of the storage grid structure, it is generally not necessary to connect a bottom angle bracket to each storage row profile.

[0069] In the exemplary storage grid structure, each storage row profile 1 is arranged on leveling feet 21. In practice, the floor 16 on which the storage grid structure 20 is arranged does not have a sufficiently flat surface, and each storage row profile is usually leveled to provide a horizontal grid of rails 5 so that the remotely operated vehicle 40 can move on the horizontal grid of rails, see Figure 1 and description of the prior art. The leveling foot 21 facilitates the leveling of the storage row profile and comprises a horizontally movable leveling device 22. Depending on the required leveling, the leveling device will extend horizontally a given distance beyond the transverse section of the storage row profile 1. Details of the leveling foot are disclosed in WO 2017 / 198784 A1.

[0070] To allow the bottom angle bracket to be connected to the bottom and central section of the storage row profile, the web 24 of the bottom angle bracket features a recess 23, which is arranged between the first ends 14, 15 of the flanges 12, 13 to accommodate the leveling device 22. The recess 23 extends above the leveling device 22 and is deeper than the maximum length by which the leveling device 22 can extend beyond the transverse cross section of the storage row profile during use. The recess 23 ensures that the installation of the bottom angle bracket 6 is both simple and cost-effective, and no intermediate connection elements are required between the bottom angle bracket 6, the storage row profile 1 and the floor 16. In addition to the advantageous installation, the disclosed bottom angle bracket 6 can also be manufactured in a very cost-effective and simple manner by manufacturing a suitable steel plate formwork, wherein the required vertical and horizontal flanges are obtained by folding / bending the two edges of the steel plate formwork. That is, the bottom angle bracket 6 is made of a single steel plate, wherein the flanges are sections of the steel plate that are bent into corresponding planes perpendicular to the steel plate sections constituting the web.

[0071] The number of bottom angle brackets 6 used to support the storage grid structure 20 can vary depending on the support requirements and / or cost / benefit analysis regarding seismic reinforcement. However, unsupported storage grid structures typically include multiple bottom angle brackets staggered at 90 degrees in four different directions.

[0072] exist Fig.10 and Fig.11 An exemplary second grid support element is shown in FIG. The second grid support element is a rail angle bracket 27 that connects the storage row profile 1 to the rails 5 that form a grid of rails at the top of the storage grid structure 20. Each rail angle bracket 27 includes a vertical flange 28 and a horizontal flange 29, wherein the vertical flange is connected to the storage row profile 1 and the horizontal flange is connected to the rail 5 arranged at the upper end 4 of the storage row profile. To prevent the rail angle bracket from interfering with the storage boxes arranged in the storage row, the maximum width of the vertical flange 28 and the horizontal flange 29 of the rail angle bracket 27 can be equal to the width W2 of the recess 19 of the storage row profile 1. The vertical flange 28 and the horizontal flange 29 of the rail angle bracket 27 are connected to each other by a web 26. The configuration of the rail angle bracket can vary as long as the maximum width is equal to the width W2 of the recess 19 of the storage row profile 1.

[0073] exist Fig.12 and Fig.13 An exemplary third grid support element is shown in FIG. The third grid support element is a support column 31a, 31b arranged between at least some adjacent storage row profiles 1', 1' of the storage grid structure. Similar to the first and second grid support elements, the maximum width of each support column is equal to the width W2 of the recess 19 of the storage row profile 1, so that the support column can be connected to the central section 7 of two adjacent storage row profiles without interfering with the plane P of the adjacent box guide plate 9 (see FIG. Figure 4 )intersect.

[0074] The support columns can be vertical inclined support columns 31a, horizontal support columns 31b, or a combination thereof. In the exemplary storage grid structure, the support columns are riveted to the center section of the corresponding storage column profile. Connecting the support columns by rivets allows the support columns to be easily installed on existing storage grid structures. However, the support columns can also be connected by, for example, bolts, as described with respect to the bottom angle brackets.

[0075] Figure 5 The exemplary storage grid structure 20 in FIG. 1 comprises a bottom angle bracket 6, a guide angle bracket 27 and support columns 31a, 31b. However, if the requirement to withstand lateral loads is relatively low, the storage grid structure according to the present invention features only grid support elements in the form of a plurality of bottom angle brackets.

Claims

1. A storage system (10) comprising a storage grid structure (20) and a plurality of remotely operated storage box handling vehicles (40), wherein the storage grid structure comprises vertical storage row profiles (1) defining a plurality of storage rows (2), wherein the storage boxes (30) can be stored on top of each other in a vertical stack, each of the storage row profiles having an upper end (4) and a lower end (11), and wherein a plurality of the storage row profiles are interconnected at their upper ends (4) by rails (5) to form a horizontal rail grid, wherein the box handling vehicles (40) can move in two perpendicular directions on the horizontal rail grid, wherein The storage grid structure is characterized by having a grid support (6, 27, 31a, 31b), the grid support comprising a plurality of bottom angle brackets (6), each of the bottom angle brackets (6) comprising a vertical flange (12), a horizontal flange (13) and a web (24), wherein the vertical flange is connected to the storage row profile, the horizontal flange is connected to the floor (16) on which the storage grid is arranged by bolts (33), the web interconnects the flanges (12, 13), each flange comprises a first end (14, 15) and a second end (17, 18), wherein The first end is arranged closer to the lower end (11) of the storage row profile connecting the vertical flanges (12) than the second end, and the web (24) has a recess (23) arranged between the first ends of the flanges.

2. The storage system according to claim 1, wherein: The lower end portion (11) of each storage row profile (1) is arranged on a leveling foot (21), and the leveling foot includes a horizontally movable leveling device (22), the leveling device can extend horizontally beyond the transverse cross-section of the storage row profile (1), and the size of the recess (23) is suitable for accommodating the leveling device (22).

3. The storage system according to claim 2, wherein: The recess (23) is higher than the levelling device (22) and wider than the maximum length by which the levelling device can extend beyond the transverse cross section of the storage row profile during use.

4. A storage system according to any one of the preceding claims, wherein: The first end (14) of the vertical flange (12) is located at or above the level of the lower end (11) of the storage row profile (1).

5. A storage system according to any one of the preceding claims, wherein: The horizontal flange (13) is at the same level as the floor (16) or the horizontal flange is located at an upper level of a grid guide rail (25) arranged on the floor.

6. A storage system according to any one of the preceding claims, wherein: The web (24) includes an inclined upper edge (26) extending between the second ends (17, 18) of the flanges (12, 13).

7. A storage system according to any one of the preceding claims, wherein: Each of the storage row profiles (1) has a cross-section including a hollow central section (7) and four corner sections (8), each of the corner sections including two vertical box guide plates (9) for accommodating the corners (11) of the storage box (30), and the width (W1) of the vertical flange (12) enables the vertical flange to be connected to the central section (7) without intersecting the plane (P) of the adjacent box guide plate (9), thereby enabling the bottom angle bracket (6) to be connected to the storage row profile (1) without interfering with the storage box (30), wherein the corners (11) of the storage box are accommodated by the corner sections (8) including the adjacent box guide plates (9).

8. The storage system according to claim 7, wherein: Such two box guide plates (9) are parallel and extend in the same direction, thereby forming a recess (19) defined by the two box guide plates (9) and the outer surface of the central section (7), and the width (W2) of the recess (19) is suitable for accommodating the vertical flange (12), wherein such two box guide plates refer to one box guide plate in each of the two corner sections (8).

9. The storage system according to any of the preceding claims comprises a plurality of guide rail angle brackets (27) for connecting the storage row profile to the guide rail, each of the guide rail angle brackets (27) comprising a vertical flange (28) connected to the storage row profile (1) and a horizontal flange (29) connected to the guide rail (5) arranged at the upper end (4) of the storage row profile.

10. A method for seismic reinforcement of a storage grid structure of a storage system, the storage grid structure being arranged on a floor (16) and comprising vertical storage row profiles (1) defining a plurality of storage rows (2), in which storage boxes (30) can be stored on top of each other in a vertical stack, each of the storage row profiles having an upper end (4) and a lower end (11), and a plurality of the storage row profiles being interconnected at their upper ends (4) by rails (5) to form a horizontal rail grid on which box handling vehicles (40) can move in two perpendicular directions, wherein: The method comprises the following steps: Step c) connecting a bottom angle bracket (6) to the storage row profile and the floor by using bolts (33), the bottom angle bracket (6) comprising a vertical flange (12) for connection to the storage row profile, a horizontal flange (13) for connection to the floor (16), and a web (24) connecting these flanges (12, 13) to each other, each flange comprising a first end (14, 15) and a second end (17, 18), the first end being closer to the lower end (11) of the storage row profile to which the vertical flange (12) is connected than the second end; and Step d) Repeating step a) until a plurality of storage row profiles are connected with bottom angle brackets and the storage grid structure has sufficient resistance to lateral forces.

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