KR102261927B1 - Beam connecting bracket and rack using the same - Google Patents

Abstract

There is no need to attach a separate angle to connect to the bracket for beam connection at both ends of the beam. By reducing the span of the beam, the deflection of the beam can be reduced, and the beam connection work can be performed while the beam is spanned over the bend, so the beam connection work is very easy. The bracket for connecting the beam is a fixing portion for fixing to the pillar, the side connection portion and the lower end of the side connection portion that protrude to at least one side from the pillar in the fixing portion in a state of being fixed to the pillar to connect the beam Or it is bent backwards from the top to support the bottom surface of the beam or to include a bending part for supporting the top surface through a fixing means.

Description

Beam connecting bracket and rack using the same}

The present invention relates to an improvement of a bracket that is installed on the surface of a column to connect and support a beam, and in particular, a column adjacent to a beam installed horizontally between the columns installed at a distance so that an article can be placed thereon It relates to an improvement of a bracket for beam connection that can be appropriately used to connect to and support each and a rack using the same.

In general, a bracket is a part used to connect two members to each other to support them or to connect other members by installing them on a necessary member, and is made and used in various shapes depending on the intended use.

On the other hand, logistics is rapidly increasing due to the increase in online purchases of various products, and also, as the number of consumers who want to receive purchased goods quickly increases, the importance of logistics is also becoming more important. Accordingly, many automated logistics warehouses are being created to efficiently store goods and transport or deliver them to the required place at the right time.

Automated warehouse is an automated facility that allows the warehousing and delivery of products to be automated, and it is made to efficiently accommodate as many items as possible in a small space, as well as to quickly find and take out necessary products. .

These automated warehouses are usually configured in a rack type, and the product storage space is arranged on the left and right, and the product is placed in a predetermined position using the loading/unloading means that can move freely forward and backward and up and down, or the product is stored. It is designed to be taken out.

The rack is arranged horizontally between a plurality of columns arranged at intervals and adjacent columns, and has a configuration in which beams are installed in multiple stages at intervals up and down so that necessary goods can be placed.

1 is a plan view for explaining a conventional beam installation structure.

In Figure 1, the pillars (C) are installed at intervals, and each pillar (C) is attached to the bracket 11 for connecting the beams in the form of a flat plate by bolts 21 or the like. Each beam connection bracket 11 protrudes to both sides of the pillar (C) to connect the beam (B).

At both ends of the beam (B), the angle 31 of the "L" cross section is attached through welding, and the protruding part of the beam (B) of each angle 31 in the longitudinal direction is the beam connection bracket ( 11), the angles 31 on both sides are fixed to the brackets 11 for connecting the beams on both sides through the bolts 21, respectively.

In the conventional beam installation structure as described above, there is a problem that the angle 31 must be attached to both ends of the beam B by welding or the like.

In addition, in the conventional beam installation structure as shown in Figure 1, the shear resistance of the bolts 21 and the shear resistance of a plurality of bolts 21 for fastening the beam connection bracket 11 and the angle 31 for the load acting on the beam (B). ) and the nut 22 are supported only by the frictional force of the beam connection bracket 11 and the angle 31 according to the fastening, so in order to obtain a large supporting force, the number or diameter of the bolts 21 must be increased. In addition, heavy goods are placed on the beam (B) constituting the rack of the automated logistics warehouse, and sagging may occur in the beam (B). In the beam installation structure shown in FIG. 1 , the bracket 11 and the angle for connecting the beam The distance between the bolts 21 on both sides for fastening (31) is the span of the beam as it is, so there is a problem that the beam (B) is vulnerable to deflection.

In addition, if you want to connect the beam (B) to the conventional bracket (11) for connecting the beam (B), since the worker has to hold the beam (B) and combine the bolts (21) and the like while holding the beam (B) horizontally. ) Connection work is laborious and takes a lot of time. In addition, the rack installed in the automated logistics warehouse is usually made much higher than the height of a person, it is more difficult to install the beam (B) in a high place.

It is an object of the present invention to provide a bracket for beam connection that does not need to attach an angle for connection to the bracket for beam connection at both ends of the beam.

Another object of the present invention is to provide a bracket for connecting a beam that can reduce the deflection of the beam by reducing the span of the beam as well as having a large bearing capacity compared to the conventional one.

Another object of the present invention is to provide a bracket for beam connection easier than when using a conventional bracket for beam connection.

Another object of the present invention is to provide a rack that can be suitably used in an automated logistics warehouse.

A rack according to the present invention includes a plurality of beams connecting horizontally between a plurality of columns installed at intervals in front and rear and left and right and a plurality of connecting members for connecting a plurality of the columns to each other obliquely up and down and left and right. As a rack provided with, each of the plurality of pillars installed on the bracket for connecting the beam so as to connect the beam to the pillar; and a bracket mechanism installed on each of the plurality of pillars to connect the plurality of connecting members to the pillars,
The bracket for connecting the beam,
a fixing part for fixing to the pillar; a lateral connection part protruding from the fixing part in a state of being fixed to the pillar to at least one side of the pillar so as to connect the beam; and a bending part for supporting the bottom surface of the beam by bending backward from the lower end or upper end of the side connection part or to support the upper surface of the beam through a fixing means,
The bracket mechanism includes a first bracket and a thickness surface having a first connection part disposed vertically with a thickness surface facing back and forth, and a first fixing part bent to the left and a second fixing part bent to the right from the first connection part. It is configured to include a second bracket having a second connection part disposed left and right to face forward and backward, and a third fixing part bent upwardly from the second connection part and a fourth fixing part bent downward from the second connection part, and the first connection part and the At least one of the second connection parts is configured to include a coupling part that can be coupled to the other one is formed.

It is preferable that a plurality of fastening holes for coupling the bolts or rivets to the fixing part and the side connection part are respectively formed.

The fixing portion includes at least one of a lower extension extending below the lower end of the side connection portion and an upper extension portion extending above the upper end of the side connection portion, and a plurality of bolts or rivets for coupling the fixing portion and the side connection portion with a bolt or rivet It is preferable that the fastening holes of each are formed.

In some cases, at least one of the lower extension and the upper extension may be bent backward to form a side fixing part that can be fixed to the side of the pillar.

The bent part is formed to extend laterally more than the outermost fastening hole among the plurality of fastening holes, so that the span of the beam supported by the bend can be shorter than the span of the beam by the bolt or the rivet. It is desirable to have

The side connection part may have a side support part that is bent backward from the fixing part to be supported on the side surface of the pillar.

The lateral connection part is formed on both sides of the fixing part, and the bent part is formed by being bent from the lower end of the lateral connection part on both sides to the rear with the pillar, and the pillar is inserted between the bending parts on both sides of the bending part A groove capable of supporting the inner side may be formed.

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The coupling portion preferably includes a slot formed in the front-rear direction.

A plurality of the connection members are disposed to be inclined vertically and horizontally to connect the plurality of pillars disposed at the front and the plurality of pillars disposed at the rear to each other, and the coupling part includes the first connection part and the second connection part to each other. It is preferable that slots are formed in either or both of the first connection part and the second connection part in the front-rear direction so that they can be intersected and coupled.

It is preferable that the first and second connecting portions have connecting holes formed on the upper and lower or left and right sides of the connecting portion, respectively.

It is preferable that at least one fastening hole is formed in the first to fourth fixing parts, respectively.

The first to fourth fixing parts may be formed of a flat plate or may be configured to be bent in an arc shape.

In some cases, the first connecting portion or the second connecting portion may have an intermediate bent portion bent left and right or up and down between both ends.

When the bracket for connecting a beam according to the present invention is used, there is no need to attach a separate angle to connect to the bracket for connecting the beam at both ends of the beam, and it is larger than the conventional bracket for connecting the beam due to the bend and the side support. In addition to providing support, the bend can reduce the beam's span by reducing the beam's deflection.

In addition, if the bracket for connecting the beam according to the present invention is used, the connecting work of the beam can be performed while the beam is crossed over the bent part, so the connecting work of the beam is very easy.

In addition, if the bracket for connecting the beam according to the present invention is used, the support rigidity of the bracket can be improved through the lower extension or the upper extension and the side fixing part installed therein.

According to the present invention, it is possible to provide a sturdy rack that can be used in an automated logistics warehouse because there is little deflection of the beam and it is possible to connect the columns and the columns arranged in the front and rear and left and right, so there is little risk of deformation.

1 is a plan view for explaining a conventional beam installation structure,
2 is a perspective view showing an example of a rack using a bracket for connecting beams according to the present invention;
Figure 3 is a partial enlarged view of the part where the bracket for connecting beams according to the present invention is installed;
4 is a perspective view showing an example of a bracket for connecting beams according to the present invention;
Figure 5 is a rear perspective view of the bracket for connecting the beam of Figure 4;
6 is a plan view of a state in which the bracket for connecting beams according to the present invention is installed on the pillar;
7 is a perspective view showing a modified example of the bracket for connecting beams according to the present invention;
8 is a perspective view showing a state in which a bracket for connecting a beam of another modified example according to the present invention is installed;
9 is a perspective view showing another modified example of the bracket for connecting beams according to the present invention;
Figure 10 is a rear perspective view of the bracket for connecting the beam of Figure 9;
11a and 11b is a view for explaining the change in the span by the bend according to the present invention and the change in deflection accordingly;
12 is a combined perspective view of a bracket mechanism installed on the pillar of the rack of FIG. 2 to connect the connecting members up and down and left and right;
13 is an exploded perspective view of a bracket mechanism installed on the pillar of the rack of FIG. 2 to connect the connecting members up and down and left and right;
Fig. 14 is a partially enlarged perspective view showing a state in which the bracket mechanism of Fig. 12 is installed;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing an example of a rack using a bracket for connecting a beam according to the present invention, Figure 3 is a partial enlarged view of a part where the bracket for connecting a beam according to the present invention is installed, Figure 4 is for connecting a beam according to the present invention A perspective view showing an example of a bracket, FIG. 5 is a rear perspective view of the bracket for connecting a beam in FIG. 4, and FIG. 6 is a plan view of a state in which the bracket for connecting a beam according to the present invention is installed on a column.

The rack (R) as shown in FIG. 2 installed in an automatic distribution warehouse, etc. is a plurality of columns (C) installed at intervals, the columns (C) adjacent to the left and right through the brackets 100 for connecting beams according to the present invention Preferably through a plurality of beams (B), a plurality of different types of brackets installed on the pillars (C), which allow horizontal connection between the necessary items to be placed between the pillars (C) and the pillars (C), when Including a plurality of connecting members (10, 20, 30, 40) that allows the column (C) and the beam (B) to be connected to each other in a diagonal or inclined direction to reinforce the structural strength of the rack (R) is composed

In the above rack (R), the installation state of the bracket 100 for connecting the beam according to the present invention is shown in more detail in FIG. 3, and the configuration of the bracket 100 for connecting the beam according to the present invention is shown in FIGS. 6 can be seen.

As shown in FIGS. 2 to 6 , the bracket 100 for connecting beams according to the present invention includes a fixing part 110 and a side connection part 130 . The fixing part 110 is for fixing to the pillar (C). A plurality of fastening holes 111 for coupling the screw member TM or rivets are preferably formed in the fixing part 110 . In some cases, the fixing part 110 may be fixed to the column C by welding regardless of whether the fastening hole 111 is formed.

Preferably, the fixing unit 110 includes a downward extension 113 extending below the lower end of the lateral connection unit 130 and/or an upward extension 115 extending above the upper end of the lateral connection unit 130 . do. The downward extension 113 or the upward extension 115 is in close contact with the surface of the column C, so that even if the fastening part such as the bolt of the fixing part 110 is slightly loosened, the flow of the fixing part 110 is It helps to minimize the angle, and it can serve to increase the installation interval or the number of installations such as bolts or rivets. However, the downward extension 113 and/or the upward extension 115 are not necessarily required.

The lateral connection part 130 is for connecting the beam (B) by protruding to at least one side from the pillar (C) in a state in which the fixing part (110) is fixed to the pillar (C). In the case where it is installed on a column C disposed on the edge of the rack R and the like and connects the beam B in only one direction, the lateral connection part 130 may be formed only on one side of the fixing part 110 . . However, if it is installed on the inner pillar (C) to connect the beam (B) on both sides, the side connection part 130 is installed on both left and right sides of the fixing part 110 as shown in FIGS. 2 to 5 . A fastening hole 131 for connecting the beam B using a screw member TM or a rivet is also preferably installed in the side connection part 130 .

Bracket 100 for connecting beams according to the present invention has a bent portion 150 . The bent portion 150 preferably functions to support the bottom surface of the beam (B) by bending backwards with the column (C) at the lower end of the side connection portion (130). Occasionally, the bent part 150 is bent from the upper end of the lateral connection part 130 to the rear with the pillar (C) and is coupled to the upper surface of the beam (B) with a bolt or the like to support the upper surface of the beam (B). . This is equivalent to installing the ones shown in FIGS. 4 and 5 upside down.

The inner surface of the bent portion 150 as above is supported on the side surface of the pillar (C) and also serves to suppress the sagging of the lateral connection portion 130 downward. When the bent portion 150 is formed on both sides of the left and right sides, a groove 152 is formed between the both sides of the bent portion 150, and the column C is inserted into the groove 152 to form the both sides of the bent portion 150. support

In addition, depending on the occasion, the bent part 150 may be formed on both the upper end and the lower end of the lateral connection part 130, in this case, the upper and lower two bent parts 150 are the lateral connection part 130 together with the beam (B). It forms a groove into which it can be inserted horizontally.

The above bending part 150 supports the beam B connected to the side connection part 130 together with the side connection part 130, and the outer end located outside the fixing means such as the outermost screw member (TM). By forming one support point of the beam (B), it serves to reduce the span of the beam (B) compared to the conventional one without the bent part 150, thereby reducing the deflection that may occur in the beam (B). .

7 is a perspective view showing a modified example of the bracket for connecting beams according to the present invention.

In some cases, as shown in FIG. 7 of the upper extension part 115 and the lower extension part 113 described in the previous embodiment, only the lower extension part 113 is formed to install the beam connection bracket 100 according to the present invention. configurable. In this case, the fastening hole 111 may also be formed in the lower extension part 113 . In some cases, it is also possible to form only the upper extension 115 of the above-described upper extension 115 and the lower extension 113 .

The rest are the same as those described with reference to FIGS. 2 to 6 .

8 is a perspective view showing a state in which the bracket for connecting beams of another modified example according to the present invention is installed.

Referring to FIG. 8 , when it is desired to reduce the deflection of the beam B by minimizing the span of the beam, the lateral extension 130 and the lateral extension 130 on the left and right sides of the fixing part 110 are bent to be installed at the bottom. The part 150 may be formed to extend laterally longer. Even in this case, the end of the bent portion 150 disposed outside the screw member (TM) reduces the span of the beam (B) to alleviate the deflection of the beam (B).

In addition, it is possible to form a side fixing portion (115a) that can be bent backwards on both sides of the upper extension portion 115 to be fixed to the side of the pillar (C). In this case, it is preferable to form a fastening hole in the side fixing part 115a so that the side fixing part 115a can be fixed to the column C with a fixing means such as a screw member TM. This is also the same in the lower extension 113 .

The rest are the same as described above with reference to FIGS. 2 to 6 .

9 is a perspective view showing another modified example of the bracket for connecting beams according to the present invention, and FIG. 10 is a rear perspective view of the bracket for connecting beams of FIG. 9 .

Referring to FIGS. 9 and 10 , a part of the side connection part 130 may be bent backward from the fixing part 110 to form a side support part 133 to be supported on the side of the pillar. In this way, the inner surfaces of the fixed part 110, both side support parts 133, and both sides of the bent part 150 cooperate together to insert the pillars to support the both side connection parts 130 and the both sides bent parts 150. A groove 152a is formed. In this case, preferably, the upper end of the side support part 133 is firmly fixed to the column by a screw member, welding, or the like.

The bent part 150 of this embodiment also minimizes the sag of the beam by reducing the span of the beam, and enables the beam connected to the side connection part 130 together with the side connection part 130 to be supported with greater support rigidity.

9 and 10 illustrate that the bent portion 150 is formed only at the lower end of the lateral connection portion 130, the bent portion 150 may be formed on the upper end of the lateral connection portion 130 symmetrically with that formed at the bottom. In this case, the upper and lower two bent portions 150 formed at the upper end and the lower end of the side connecting portion 130 form a groove into which the beam B can be horizontally inserted together with the side connecting portion 130 .

The description of the remaining fixing part 110 and the side connection part 130 is the same as in FIG. 8 .

11A and 11B are diagrams for explaining a change in span due to a bent part and a change in deflection according to it according to the present invention.

When the beam (B) is supported only by the screw member of the previous embodiment without a bend according to the present invention, the span L, bending of the beam (B) when the distributed load w acts on the beam (B) as shown in FIG. 11A If the stiffness EI, then the maximum deflection of the beam δ1 = 5wL1 ⁴ /384EI --- (Equation 1).

However, the bent portion ( ) according to the present invention reduces the span from L1 to L2 as shown in FIG. 11B . Accordingly, when the bracket according to the present invention is used, the maximum deflection of the beam δ2 = 5wL2 ⁴ /384EI --- (Equation 2).

δ2/δ1 = 5wL2 ⁴ /5wL1 ⁴ = L2 ⁴ /L1 ⁴ --- (Equation 3).

According to the above (Equation 3), for example, assuming that L1 is 2m, and the span is reduced by 5cm at each of both bends, L2 is 1.9m. Substituting this into (Equation 3), δ2/δ1 = 13.033/16 = 0.815. That is, according to the present invention, it is possible to further reduce the deflection by about 18% purely only by the function of reducing the span of the beam.

If the span is reduced by 10 cm at each of the bends on both sides under the above conditions, the deflection can be reduced by about 34%.

In addition, since the bent part supports the beam (B) with its own rigidity, the support rigidity of the beam (B) is further increased, and the work can be performed while the beam (B) is placed over the beam, making it easier to connect the beam. allows you to

12 is a combined perspective view of a bracket mechanism installed on the column of the rack of FIG. 2 to connect the connecting members up and down and left and right, and FIG. 13 is installed on the column of the rack of FIG. 2 to connect the connecting members up and down and left and right It is an exploded perspective view of the bracket mechanism, and FIG. 14 is a partially enlarged perspective view showing the state in which the bracket mechanism of FIG. 12 is installed. It will be described with reference to FIG. 2 together.

The rack (R) shown in FIG. 2 installed at an automatic distribution warehouse, etc. is horizontally connected between the pillars (C) adjacent to the left and right through a plurality of pillars (C) and brackets installed at intervals to stack necessary goods. A plurality of connections that allow a plurality of beams (B), columns (C) and columns (C) or beams (B) to be connected to each other in a diagonal or inclined direction to reinforce the structural strength of the rack (R). It is installed on the member (10, 20, 30, 40) and the pillar (C) and includes a bracket mechanism 200 that allows a plurality of connecting members (10, 20, 30, 40) to be connected to the pillar (C) do.

In the above rack (R), the installation state of the bracket mechanism 200 is shown in detail in FIG. As shown, the fastening hole in a state in which the first fixing part 215 and the second fixing part 217 of the first bracket 210 are positioned on the surface of the column C supporting the beam B, etc. Through 219, the first fixing part 215 and the second fixing part 217 are fixed to the column C and the like using fixing means 250 such as bolts or rivets. Then, the second connection part 231 of the second bracket 230 is removed through the slot 202a of the first connection part 211 constituting the coupling part 202 and the slot 202b of the second connection part 231 . 1 is cross-coupled to the first connection part 211 of the bracket 210 so that the third fixing part 235 and the fourth fixing part 237 are in close contact with the surface of the column C or the like. In this state, the third fixing part 235 and the fourth fixing part 235 and the fourth fixing part 250 using a fastener 250 such as a bolt or a rivet through the fastening hole 239 formed in the third fixing part 235 and the fourth fixing part 237 . The fixing part 237 is fixed to the pillar (C) or the like. Accordingly, the first connecting portion 211 and the second connecting portion 231 are installed to cross each other in a +-shape on the surface of the column C and the like.

After fixing the bracket mechanism 200 to the pillar (C) using a fixing means 250 such as bolts, rivets, welding, etc., preferably using bolts or rivets, the first connection part 211 above the coupling part 202 The connecting member 10 disposed upward through the connection hole 213 is connected to the first connection part 213 under the coupling part 202 , and the connecting member 20 disposed downwardly is connected to the first connection part 213 under the coupling part 202 . Preferably, as shown in FIG. 14 , the upper and lower two connecting members 10 and 20 connected to one end of the column C are inclined and the other end is installed above and below the front or rear column C. each connected to the bracket mechanism 200 .

It may be connected to the same side of the first connector 211 , but one may be connected to the right side and the other may be connected to the left side.

In the bracket mechanism 200 according to the present invention as described above, since the first connection part 211 and the second connection part 231 are coupled to each other through the slots 202a and 202b, the first connection part 211 includes the first to first 4 Since it is supported in the left and right central portions of the fixing parts 215, 217, 235, 237, it is supported in a balanced manner from side to side without being biased to one side.

Similarly, using a fixing means 250 such as bolts or rivets centering on the coupling part 202, the second connection part 231 on the left side of the coupling part 202 using bolts or rivets has a connection hole 233. ), the connecting member 30 disposed in the left direction is connected, and the connecting member 40 disposed in the right direction is connected to the second connecting part 231 on the right side of the coupling part 202 . Preferably, as shown in FIG. 14, the left and right two connecting members 30 and 40 connected at one end to the pillar C are inclinedly disposed so that the other end is a bracket mechanism installed on the front or rear pillars C on both sides. (200) respectively.

In this case, the second connection part 231 is supported by the first to fourth fixing parts 215, 217, 235, and 237 in the vicinity of the upper and lower central parts, so that it is not deflected much to either side of the upper and lower sides based on the fixed part. supported to be caught. In some cases, one side of the coupling portion 202 may be formed only with a groove 202c having a width greater than that of a slot.

That is, the bracket mechanism 200 connects a plurality of connecting members 10 , 20 , 30 , 40 in the vertical and horizontal crossing directions to support them so as not to be deflected too much vertically and horizontally, and the first connection part 211 ) and the second connection part 231 can complement and support each other in the direction in which the supporting power is weak, so that a large supporting power can be exhibited.

By using the bracket 100 and the upper bracket mechanism 200 according to the present invention, it is possible to provide a sturdy rack (R) that is less prone to sagging and does not deform.

It is preferable that connection holes 213 and 233 are respectively formed in the upper and lower or left and right sides of the first and second connecting portions 211 and 231 as described above with respect to the connecting portion 202 . In addition, it is preferable that at least one fastening hole 219 and 239 are formed in the first to fourth fixing parts 215 , 217 , 235 and 237 , respectively.

Optionally, the first to fourth fixing parts 215 , 217 , 235 , 237 may be configured to include a flat plate or bent in an arc shape, and the first connection part 211 or the second connection part 231 is It may have an intermediate bent part bent left and right or up and down between both ends.

The present invention is likely to be suitably used to make a rack of an automated logistics warehouse, and may be used to make other structures connecting columns and beams.

100: bracket for beam connection 110: fixed part
111, 131: fastening hole 113: downward extension
115: upper extension 115a: side fixing part
130: lateral connection part 150: bent part
152, 152a: groove 200: bracket mechanism
202: coupling portion 202a, 202b: slot
210: first bracket 211: first connection part
215: first fixing part 217: second fixing part
230: second bracket 231: second connection part
235: third fixed part 237: fourth fixed part
B: Beam C: Column
R: Rack TM: Threaded member

Claims (9)

A rack comprising a plurality of beams horizontally connecting a plurality of pillars installed at intervals in front and rear and left and right and a plurality of adjacent pillars and a plurality of connecting members for connecting the plurality of pillars to each other in an inclined manner in up and down and left and right directions,
Brackets for connecting beams that are respectively installed on the plurality of pillars so as to connect the beams to the pillars; and
and a bracket mechanism installed on each of the plurality of pillars to connect the plurality of connecting members to the pillars,
The bracket for connecting the beam,
a fixing part for fixing to the pillar;
a lateral connection part protruding from the fixing part in a state of being fixed to the pillar to at least one side of the pillar so as to connect the beam; and
It is bent backward from the lower end or upper end of the side connection part to support the bottom surface of the beam or to include a bending part for supporting the upper surface of the beam through a fixing means,
The bracket mechanism,
A first bracket having a first connection part disposed up and down with the thickness surface facing back and forth, a first fixing part bent to the left and a second fixing part bent to the right from the first connection part, and left and right with the thickness surface facing back and forth and a second bracket having a second connection part disposed as a , a third fixing part bent upward from the second connection part, and a fourth fixing part bent downward, and at least one of the first connection part and the second connection part. Any one of the rack, characterized in that configured to include a coupling portion that can be coupled to the other one is formed. The rack of claim 1, wherein a plurality of fastening holes for coupling bolts or rivets to the fixing part and the side connection part are respectively formed. The method of claim 1, wherein the fixing portion is provided with at least one of a lower extension extending downward than the lower end of the lateral connection portion and an upper extension portion extending upward than the upper end,
and a plurality of fastening holes for coupling bolts or rivets to the fixing part and the side connection part are respectively formed. [Claim 4] The rack according to claim 3, wherein a side fixing part that can be bent backward to be fixed to a side surface of the pillar is formed on at least one of the lower extension part and the upper extension part. According to claim 2, wherein the bent portion is formed at the lower end of the lateral connection part to extend laterally more than the outermost fastening hole among the plurality of fastening holes to form a span of the beam supported by the bent part by the bolt or the and allowing it to be shorter than the span of the beam by means of a rivet. The rack according to claim 1, wherein the side connection part comprises a side support part that can be supported on the side of the pillar by bending backward from the fixing part. The method according to any one of claims 1 to 6, wherein the lateral connection portion is formed on both sides of the fixing portion,
The bent portion is formed by bending each of the lower ends of the lateral connection portions on both sides to the rear with the pillars, and the pillars are inserted between the bending portions on both sides to form a groove capable of supporting the inner side of the bent portion A rack characterized in that. The method of claim 7, wherein the plurality of connecting members are arranged to be inclined vertically and horizontally to connect the plurality of pillars disposed at the front and the plurality of pillars disposed at the rear to each other,
The coupling part, characterized in that the first connection part and the second connection part include a slot formed in the front-rear direction in either or both of the first connection part and the second connection part so that the first connection part and the second connection part can be coupled to each other. rack to do. The method according to any one of claims 1 to 6, wherein the plurality of connecting members are arranged inclined up and down and left and right to connect the plurality of the pillars disposed in the front and the plurality of the pillars disposed in the rear to each other,
The coupling part, characterized in that the first connection part and the second connection part include a slot formed in the front-rear direction in either or both of the first connection part and the second connection part so that the first connection part and the second connection part can be coupled to each other. rack to do.

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