CN1400875A - Shelving - Google Patents

Abstract

The shelf comprises: a shelf member with profile bars (11) made of sheet metal. The profile bars (11) are reinforced by reinforcement strips (12) over the part of the length of the frame element which can withstand high loads. Since the reinforcing strips do not extend over the entire length of the frame element, a high load-bearing capacity can be achieved with a low weight. The shelf member may be a shelf upright (1), wherein a reinforcing strip (12) is provided on the lower part (7) of the upright. But the top (6) of column is not provided with reinforcement band. Or the shelf component can also be a horizontal cross bar (2) of the shelf, wherein the reinforcing belt is arranged in the middle.

Description

shelf

The invention relates to a structure part (shelf component) of a shelf, in particular to a column or a transverse bar of a steel shelf.

Common racks consist of vertical uprights (for vertical placement) and horizontal crossbars (connecting bars) as well as brackets or other pallets or shelves for supporting stored goods.

Members of different profiles are used for the uprights, transverse rails and other rods of such shelves. Herein the term "profile" refers hereinafter to the shape of a member in cross-section perpendicular to the length direction of the member described above.

These components may be made from rolled flat sheet metal which is metal formed (by successive roll bending by rollers) using a roll forming process to form the desired contoured components. These profiles are the same over the entire length of the aforementioned member. EP-A-0715974 discloses an example of such a member roll-formed from sheet metal.

In the existing literature there are a large number of techniques related to improving the load-carrying capacity of such members and optimizing the efficiency of the use of materials, for example DE-A-2459421 discloses a double T-profile crossbar in a steel frame, this profile consists of Parallel upper and lower flanges connected by a web. It is made of a single sheet metal in such a way that the relatively highly stressed upper and lower flanges have two sheet metal layers, while the relatively lower stressed web has only one single sheet metal layer. Each of the double sheet metal layers of the upper and lower flanges can be formed by folding from a single sheet metal. And DE-A-2421918 shows a similar structure with a strip of separate sheet metal inserted between the two layers of each of the upper and lower flanges to further strengthen the structure. DE-C-2628537 and DE-A-3002401 disclose shelf elements made of single or multiple layers of metal.

In contrast to the aforementioned document, which discloses a method for producing the cross-sectional profiles of parts with different strengths using different numbers of sheet metal layers, WO 00/29138 also discloses a method for producing the above-mentioned components from sheet metal having different thicknesses. The sheet metal can be obtained by welding two thin metal sheet strips to the long edges of a thick sheet metal strip. The two thin metal strips are then bent into a U-profile shape with thin legs and thick webs. This profile has the same shape over the entire length of the above-mentioned member. DE-C-19525347 and WO99/05380 disclose a steel element for use in vehicle bodies or buildings, in which reinforcement plates welded thereon are provided. The elements disclosed in WO99/05380 are filled with concrete.

An object of the present invention is to provide a cost-effective shelf structure, which can further optimize the use of materials and improve the load-bearing performance. Another object is to provide a method of manufacturing such a shelf member.

These objects can be achieved by the shelf member of claim 1 and the manufacturing method of claim 9 .

When optimizing shelf members in the prior art, attention has primarily been to optimizing the profile shape so that it remains the same over the entire length of the shelf member. However, the present invention is based on the idea that the profiles of different parts of the shelf member lengthwise are not the same. This takes into account that different parts of the shelf member length can carry different loads. For example, each section of a shelf upright can only carry the load above the shelf so that the load is reduced from the bottom of the upright to the top.

The shelf element consists of a profile member. The profiled cross-sectional shape of the different shelf elements can be obtained by reinforcing the profile member with a reinforcing strip extending along the length and only over a portion instead of the entire length of the profile member or shelf member. This increases the efficiency of using materials.

The reinforcing strip can be made integrally connected to the profile bar. Preferably, however, the two are two separate sheets which are co-fed and connected to each other during the manufacture of the shelf member.

Although steel racks are usually disassembled for shipping and moving and assembled only when they reach their final destination to save on shipping, their sheer weight causes shipping costs to exceed manufacturing costs. The efficient use of the materials of the present invention reduces the weight of the shelf relative to its load carrying capacity, reducing manufacturing and shipping costs.

The dependent claims of the invention correspond directly to the preferred embodiments.

Dependent claims 2-4 relate to preferred methods of connecting reinforcement strips and profile bars.

The embodiment according to claim 5 has the particular advantage that the reinforcing strips do not affect the appearance of the shelf.

Claims 6-8 relate to clearer embodiments using shelf elements with high load bearing capacity and efficient material utilization.

Claims 9-10 relate to an economical method of manufacturing a shelf element according to the invention.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which:

Figure 1 shows the load rack.

Figures 2 and 3 show schematic diagrams of two different sets of apparatus for manufacturing shelf components.

Shown in Figure 4 is the transverse crossbar.

The load carrier in FIG. 1 consists of uprights 1 connected by horizontal transverse crossbars 2 and horizontal and diagonal struts 4 . The shelf 3 and the thickness direction bar 5 are supported on the transverse bar 2 for storing goods. A bottom plate 9 is welded to the bottom surface of each column 1 . Each lateral bar 2 is welded to the side with an engaging plate 10 having a hook (not shown) cooperating with a hole (not shown) in the upright 1 . The column 1, the cross bar 2, the strut 4 and the thickness direction bar 5 are all different shelf components made of steel. Each part of the column 1 carries the part of the rack load above that part respectively. In this way, the bending load on the column 1 gradually increases from the top to the bottom of the column. The layered increase of this load will be taken into account when designing the profile of the column 1 .

Fig. 1 also shows the profile of the section perpendicular to the length direction of the column at two positions of the column 1 . The column 1 comprises a profile bar 11 extending over the entire length of the column. The above-mentioned profile bar is roll-formed from sheet metal and has the same hollow profile along its entire length. The hollow profile of the uprights is not completely closed, wherein each upright 1 has a notch 8 along the entire length of the upright, and the notches are located where the uprights 1 face each other along the narrow side of the shelf. The strut fits into the notch and is welded or screwed there.

The contour of the upper part 6 of each upright is only defined by the profile bars 11 . The lower part 7 includes two additional reinforcing strips 12 extending along the length direction of the column, and are fixed on the opposite inner wall of the profile rod 11, which can be welded, screwed, riveted or other rigid or non-rigid connections. .

The reinforcement strip 12 is mounted on the inner wall of the profile bar 11 perpendicular to the side wall with the notch 8 . They thus reinforce the upright against its bending in the plane in front or behind the shelf, ie in the plane of the transverse crossbar 2 . This reinforcement is important because, except for the narrow sides of the shelves, those front and rear have no or almost no diagonal struts, since the presence of such diagonal struts would prevent items from being placed on the shelves. Moreover, the horizontal bar 2 is often not rigidly connected to the column 1, so its support to the column is also limited.

In this embodiment, the upper part without the reinforcing strip 12 accounts for about 4/5 or more of the length of the column, and the lower part 7 with the reinforcing strip 12 extending from the bottom plate 9 accounts for 1/5 or less. The load frame is up to 12 meters or higher. The length of the reinforcing belt is about 2.5 meters.

What Fig. 2 shows is the schematic diagram of a set of equipment for manufacturing column 1. Also shown are profile sections formed at different steps of the manufacturing process. The device comprises a straightening machine 21 with one roll 22 of a first sheet metal 23 and two rolls of a second sheet metal 25, of which only one roll 24 is visible. The straightener 21 uncoils the metal sheets 23, 25 from the coils 22, 24, straightens them and conveys them parallel to each other in the same direction.

And the kit further comprises joining and roll forming means 26 . In it, the individually cut strips of the second metal sheet 25 are connected to the first metal sheet by welding or nailing. Before or after joining, the first sheet metal 23 is rolled to the profile of the profile bar 11 .

The cutting device 27 cuts the first sheet metal into strips of the same length as the column 1, but longer than the strip of the second sheet metal 25 fastened thereto. The punching machine 28 punches holes (not shown) in the first metal plate 23 for engaging with the transverse bar 2 and for connecting and fixing with the strut 4 by screws. Finally, the bottom plate 9 (FIG. 1) is welded to one end of the combination of the first and second metal plates 23, 25, while the ends of the first and second metal plates 23, 25 are flush. In the column 1 produced in this way, the first metal sheet 23 forms the profile bar 11 and the two strips of the second metal sheet 25 form the reinforcing strip 12 .

Figure 3 shows a modified version of the plant shown in Figure 2 . This modification includes two different straighteners 31 , 32 for feeding the first and second metal sheets 23 , 25 in opposite directions. As in the embodiment of Fig. 2, metal sheets 23, 25 are unrolled from rolls 22, 24 respectively and straightened. A roll-forming cutting device 33 is provided for forming the first sheet metal to the profile of the profile bar 11 and cutting it to length for the upright column 1 and feeding it to the connecting device 34 . The above-mentioned connecting means 34 are fed two mutually parallel strips of the second metal sheet from opposite directions. These strips are inserted from the front side into the profile bar 11 made of the first sheet metal 23 via the connection means 34 and are cut shorter than the length of the profile bar 11 to form the reinforcing strip 12 . The reinforcement strips 12 are fixed on the opposite inner side walls of the profile bar 11 by welding or nailing.

Since the reinforcement strip 12 is shorter than the profile bar 11, one part 7 of the column has a reinforcement strip, while the other part 6 has no reinforcement strip.

FIG. 4 shows a side view of the cross bar 2 when the joint plate 10 has not been welded to both ends of the transverse cross bar 2 . Also shown are sections along the lines A-A and B-B. Similar to the column 1 , the transverse cross bar 2 includes a profile bar 41 and a reinforcement strip 42 . The profile bar 41 extends over the entire transverse length of the cross bar and exhibits a rectangular hollow profile in a section perpendicular to its length. Also the hollow profile is not completely closed, the underside of the profile bar 41 has a notch 43 .

The reinforcement strip 42 is arranged at the bottom of the profile rod 41 and covers the notch 43 . The reinforcement strip 42 is welded to the profile bar 41 at the notch 43 and is capable of carrying a part of the load of the cross bar 2 in use. The length of the reinforcing strip 42 is about 1/5 of the length of the cross bar 2 . The adjacent end 45 which accounts for 2/5 of the length of the cross bar 2 is not provided with a reinforcing strip. However additional reinforcing strips may be provided at the outermost ends of the crossbar 2 to increase the stiffness of its connection to the joint plate 10 and thus to the upright 1 .

The plant of Fig. 2 or 3 can likewise be used for the manufacture of transverse rails 2, wherein only one roll is required to provide the second sheet metal.

In the above-described embodiments of the uprights 1 and the transverse bars 2, the reinforcing strips 12, 42 are both manufactured from a sheet separate from that of the profile bars 11, 41 and fixed to the planar sides of the profile bars 11, 41 . The first and second sheets 23, 25 are of the same composition and thickness, but differ only in their width. However, different materials and/or different thicknesses are also possible. Furthermore, it is also possible to manufacture the reinforcing band integrally with the profile bar by bending the sheet of the profile bar into the position of the reinforcing band.

Other members used in the shelf, such as struts 4 and thickness-wise rods 5 may be of the structure shown in FIG. 4 . The profile members preferably extend over the entire length of the shelf member, the reinforcing strips being from 1/20 or 1/10 to 1/5 or 1/2 of the length of the shelf member or profile member. In this way, because the reinforcement band does not extend over the entire length, but is only provided at the place where the load is the greatest, relatively small weight also has high strength. Apart from the reinforcement bands, the profile bar is hollow inside and has a lengthwise notch, ie has an open profile, which facilitates roll forming. A load-carrying shelf comprising shelf elements according to the present invention can carry 50% more load than a conventional shelf of the same weight.

claims

(Amended in accordance with Article 19 of the Treaty)

1. A shelf column, comprising:

A longitudinal hollow profile bar (11) formed by a first sheet (23)

and a pair of reinforcing strips (12) formed from a second plate (25), each of a length less than the profile bar (11) and mounted to the profile bar along the lower portion (7) of the upright The column is reinforced on opposing inner surfaces of the members (11, 41).

2. A transverse rail for a shelf, comprising:

a longitudinal hollow profile bar (41) formed by the first plate (23) and

a reinforcing strip (42) formed by a second sheet (25) of a length shorter than the profile bar (41) and fitted to the inner surface of the profile bar (11, 41) along the middle (44) of the cross bar to reinforce the crossbar.

3. The shelf column or cross bar according to claim 1 or 2, characterized in that the reinforcing strip (12, 42) is connected to the profile bar (11, 41) by rigid locking.

4. The shelf column or crossbar according to claim 1 or 2, characterized in that the reinforcing strip (12, 42) is connected to the profile bar (11, 41) by nailing.

5. Shelf upright or crossbar according to claim 1 or 2, characterized in that the reinforcing strip (12, 42) is welded to the profile bar (11, 41).

6. The shelf column or crossbar according to any one of claims 1-5, wherein the first and second plates are respectively first and second metal plates.

7. A method of manufacturing a shelf column or crossbar (1, 2) as claimed in any one of claims 1-6, comprising the steps of:

supply the first plate (23),

supplying reinforcement strips (12, 42) of a second sheet (25) parallel to the first sheet, and

The first plate is made into profile bar (11),

Wherein, the length of the reinforcement band (12) is made shorter than the profile rod (11), and it is fixed on the profile rod.

8. The method according to claim 7, characterized in that the reinforcing strip (12) is first cut to length and then fixed to the first sheet (23), which then forms a profile bar (11).

9. The method according to claim 7, characterized in that the first plate (23) is first formed into a profile bar (11) and then connected to a reinforcing strip (12) cut to a certain length.

10. A method according to any one of claims 7-9, characterized in that feeding the first and second sheets (23, 25) takes place in the same direction.

11. A method according to any one of claims 7-9, characterized in that the feeding of the first and second sheets (23, 25) takes place in opposite directions.

Claims (13)

1. A shelf member comprising: A longitudinal profile member (11, 41) formed from a first sheet (23) and a reinforcement strip (12, 42) formed by a second sheet (25) extending along the profile bar (11, 41) and mounted thereon to reinforce it, It is characterized in that the length of the reinforcing strip (12, 42) is shorter than that of the profile bar (11, 41). 2. The shelf component according to claim 1, characterized in that the reinforcement strips (12, 42) are connected to the profile rods (11, 41) by rigid locking. 3. Shelf element according to claim 1, characterized in that the reinforcement strips (12, 42) are connected to the profile bars (11, 41) by nailing. 4. Shelf element according to claim 1, characterized in that the reinforcement strips (12, 42) are welded to the profile bars (11, 41). 5. Shelf element according to claim 1, characterized in that the profile bar (11, 41) has a hollow profile, and the reinforcing strip (12, 42) is arranged within said hollow profile. 6. Shelf element according to any one of claims 1-5, for a steel shelf, having a section (7, 44) bearing high loads and a section (6, 44) bearing low loads along its length 45), wherein the reinforcing strip (12, 42) is provided on the part (7, 44) subjected to high load, and the first and second plates are first and second metal plates, respectively. 7. A shelf upright, comprising a shelf element according to claim 6, wherein the reinforcing strip (12) is provided on the lower part (7) of the upright instead of the upper part (6). 8. A transverse crossbar of a shelf, comprising a shelf element according to claim 6, wherein the reinforcing strip (42) is provided on the middle part (44) of the crossbar instead of the adjoining part (45). 9. A method of manufacturing a shelf member (1, 2), comprising the steps of: supply the first plate (23), supplying reinforcement strips (12, 42) of a second sheet (25) parallel to the first sheet, and The first plate is made into profile bar (11), Wherein, the length of the reinforcement band (12) is made shorter than the profile rod (11), and it is fixed on the profile rod. 10. The method according to claim 9, characterized in that the reinforcing strip (12) is first cut to length and then fixed to the first sheet (23), which then forms a profile bar (11). 11. The method according to claim 9, characterized in that the first plate (23) is first formed into a profile bar (11) and then connected to a reinforcing strip (12) cut to a certain length. 12. A method according to any one of claims 9-11, characterized in that the feeding of the first and second sheets (23, 25) takes place in the same direction. 13. A method according to any one of claims 9-11, characterized in that the feeding of the first and second sheets (23, 25) takes place in opposite directions.

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