WO2009035245A1

WO2009035245A1 - Boltless sectional shelving unit

Info

Publication number: WO2009035245A1
Application number: PCT/KR2008/005307
Authority: WO
Inventors: Chun Soon Choi
Original assignee: Chun Soon Choi
Priority date: 2007-09-10
Filing date: 2008-09-09
Publication date: 2009-03-19
Also published as: KR100919671B1; KR20090026588A

Abstract

Disclosed is a boltless sectional shelving unit. The boltless sectional shelving unit comprises four vertical frames comprising a pair of supporting portions of an angle bar type, a plurality of hangers and a plurality of coupling holes reciprocally formed thereon at a predetermined interval in the lengthwise direction and each hanger having a latching portion and a pressing portion; a plurality of the horizontal frames for connecting adjacent two vertical frame to each other comprising a plurality of assembling holes for penetrating the hangers therethrough, a plurality of upper and lower slits, a plurality of supporting flange and coupling holes; and a plurality of shelving plates placed on the supporting flanges.

Description

BOLTLESS SECTIONAL SHELVING UNIT

Technical Field

[1] The present invention relates to a boltless sectional shelving unit for exhibiting all sorts of goods or articles arranged on the floor or warehouse etc. in multilayer structure, and more particularly to a boltless sectional shelving unit in that vertical frames and horizontal frames of the shelving unit for supporting a plurality of shelving plates in multilayer structure can be strongly assembled to each other without using separate bolts and the shelving unit can be easily formed at an arbitrary length on the spot. Background Art

[2] Generally, a shelving unit is formed on various markets or warehouse etc. so as to exhibit all sorts of goods or articles.

[3] This shelving unit includes a latticed shelving frame and a plurality of shelving plates of a multilayer shape formed and supported on the shelving frame at a predetermined interval. Also, most of the shelving units are built in sections for easy carrying, establishing, and disjointing thereof.

[4] The knockdown shelving unit can take various forms according to the purposes thereof. The general shelving unit includes a shelving frame having a plurality of angle posts of "L" type arranged in the form of a rectangular shape, a plurality of coupling slots formed at the angle post at a predetermined interval, connecting beams horizontally coupled to the adjacent two angle posts through the coupling slots and the bolts and nuts, and shelving plates placed on the connecting beams of the shelving frame.

[5] However, in the conventional knockdown shelving unit, since the plurality of the angle posts is individually coupled to each connecting corner of the connecting beams through the bolts and nuts (8 places per one layer of the shelving plate), there are very many connecting portions. Accordingly, there are problems in that the assembling and disjointing works are very troublesome and these works is often time consuming.

[6] In the meantime, Korean Utility model registration No. 20-0391947 and US Patent

No. 5,553,549 disclose shelving units capable of constituting the shelving frame without a separate bolting work.

[7] In the Korean Utility model registration No. 20-0391947, the shelving unit includes an angle post, a plurality of latching holes vertically formed at the angle post, a pair of opposed connecting beams having latching hooks for inserting into the latching holes formed at both end portions of the connecting beams, and coupling portions having latching holes vertically bent to both end portions. Accordingly, the latching hooks formed at both end portions of the pair of connecting beams are inserted into the latching holes of the connecting portions of the connecting beams, thereby constituting the shelving frame without the separate bolting work.

[8] However, in the Korean Utility model registration No. 20-0391947, since the coupling portions corresponding to two connecting beams are coupled through fixing beams after two angle posts are coupled to the connecting beams vertically bent to both end portions thereof, the connecting beams and the fixing beams should be previously manufactured according to a predetermined standard thereof. Accordingly, because the size of the shelving frame can be determined according to the standard of the connecting beam and the fixing beam, it is difficult to actively cope with the installing place thereof.

[9] Especially, in case that a large amount of articles are stored in the warehouse and so forth, it is necessary for the shelving units to be arranged on both sides at some length. However, in the conventional art, since a separate means coupled to other shelving unit is not equipped, the plurality of shelving units cannot be continuously arranged. Also, because the installing space of the shelving unit is narrow according to any place thereof, there are many empty spaces.

[10] That is, since the length of the connecting beam or fixing beam is determined in consideration of the safety load of the article, the shelving unit cannot help being manufactured more than a predetermined width, thereby various shelving units must be formed therein.

[11] Accordingly, the completed shelving units cannot help being continuously arranged without forming the separate connecting means and the empty spaces can be also existed according to any place thereof.

[12] In the US Patent No. 5,553,540, the shelving unit includes a vertical post of an angle type, a plurality of key holes formed at the vertical post at a predetermined interval, and a pair of connecter of a "L" type vertically formed at both end portions of the horizontal member. Accordingly, the connecters are inserted into each key holes and then, pressed down, thereby constituting the shelving frame without the separate bolting work.

[13] However, in the US Patent No. 5,553,540, since the attaching connectors are formed at only both end portions of the horizontal member, the connecters should be previously manufactured according to a predetermined standard thereof. Accordingly, because the size of the shelving frame can be determined according to the standard of the connector, it is difficult to actively cope with the installing place thereof.

[14] Also, like the Korean Utility model registration No. 20-0391947, the completed shelving units cannot help being continuously arranged without forming the separate connecting means and the empty spaces can be also existed according to any place thereof.

Disclosure of Invention

Technical Problem

[15] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a boltless sectional shelving unit in that vertical frames and horizontal frames of the shelving unit can be easily and strongly assembled and disjointed to each other without using separate coupling means such as bolts etc. and the shelving can be simply formed at an arbitrary length.

[16] Another object of the present invention is to provide a boltless sectional shelving unit capable of integrally and strongly coupling to other shelving units as occasion demands.

[17] Further another object of the present invention is to provide a boltless sectional shelving unit in that any shelving unit of a multilayer shape can be easily formed between two adjacent shelving units without forming additional shelving unit.

[18] Further another object of the present invention is to provide a boltless sectional shelving unit in that the shelving unit can be easily formed at an arbitrary width on both sides by connecting to various shelving units or without forming the horizontal frame more than a predetermined length in consideration of the safety load. Technical Solution

[19] To accomplish the object, the present invention provides a boltless sectional shelving unit comprising: four vertical frames comprising a pair of supporting portions of an angle bar type integrally and vertically bent to each other, a plurality of hangers and a plurality of coupling holes protruded toward an inside of each supporting portion and reciprocally formed thereon at a predetermined interval in the lengthwise direction and each hanger having a latching portion vertically protruded toward an inside of the supporting portion and a pressing portion for grasping a horizontal frame together with the supporting portion horizontally bent from a front end of the latching portion; a plurality of the horizontal frames for connecting adjacent two vertical frame to each other comprising a plurality of assembling holes for penetrating the hangers therethrough formed in the length direction thereof at a predetermined interval, a plurality of upper slits for inserting the latching portions therein formed vertically at a center of an upper end of each assembling hole, a plurality of lower slits for inserting the latching portions therein retractably and upward formed at a lower end thereof collinearly with each upper slit, a plurality of supporting flanges formed at upper end portion thereof, and a plurality of coupling holes formed at each supporting flange between the upper and lower slits at a predetermined distance; and a plurality of shelving plates placed on the supporting flanges, which are formed at each layer of the horizontal frames connected to the vertical frames.

[20] Preferably, the pressing portion of each hanger is in the form of an arc type.

[21] Preferably, the upper end portion of the assembling hole is upward slanted toward the upper slit.

[22] Preferably, the boltless sectional shelving unit further comprises a plurality of connecting slots formed at a corner of each vertical frame at a predetermined interval and a plurality of connecting horizontal frames having a pair of latching protrusions formed at both end portions thereof and inserted into two connecting slots of the adjacent vertical frames, and other supporting flanges formed at an upper end portion thereof.

[23] Preferably, a plurality of separation preventing pieces is formed at the supporting flange of each connecting horizontal frame.

[24] Preferably, the boltless sectional shelving unit further comprises at least two connecting vertical frames of "T" type having two intermediate supporting portions integrally come in contact with each other and two side supporting portions vertically and reciprocally bent to a front end of each intermediate supporting portion in the opposite direction, a plurality of hangers and a plurality of coupling holes protruded toward an inside of each supporting portion and reciprocally formed thereon at a predetermined interval in the lengthwise direction and each hanger having a latching portion vertically protruded toward an inside of the supporting portion and a pressing portion for grasping a horizontal frame together with the supporting portion horizontally bent from a front end of the latching portion.

[25] Preferably, the boltless sectional shelving unit further comprises another shelving plate of a metal plate type formed at an uppermost and lowermost layers of a multilayer shelving plate, the shelving plate having a plurality of skirts formed at four sides thereof, other assembling holes penetrated the hangers therethrough formed at both end portions, other upper slits for inserting the latching portions therein formed vertically at a center of an upper end of each assembling hole, a plurality of lower slits for inserting the latching portions therein retractably and upward formed at a lower end of each skirt collinearly with each upper slit.

Advantageous Effects

[26] In the boltless sectional shelving unit according to the present invention, there are effects in that vertical frames and horizontal frames of the shelving unit can be easily and strongly assembled and disjointed to each other without using separate coupling means such as bolts etc. [27] Also, there is another effect in that the plurality of the coupling holes are formed an the horizontal and vertical frames at a predetermined interval, so that the completed shelving units can be strongly coupled to each other and the auxiliary shelving unit can be additionally connected to the shelving unit, thereby implementing various kinds of shelving units.

[28] Also, there is further another effect in that the independent shelving units can be easily coupled to each other on both sides, the additionally forming loading spaces are formed between two shelving units, and the length of the shelving unit can be sufficiently increased at a desired length.

[29] Moreover, there is further another effect in that the assembling holes coupled to the hanger of the vertical frame and the lower slits are formed thereon at a predetermined interval, so that the horizontal frame can be cut at an arbitrary length on the spot.

[30] Accordingly, the present invention can implement the safety, confidence, convenience in terms of use and cost-down. Brief Description of the Drawings

[31] The above as well as the other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[32] FIG. 1 is a perspective view illustrating a boltless sectional shelving unit according to the present invention;

[33] FIG. 2 is an exploded perspective view illustrating the principal part of a boltless sectional shelving unit according to the present invention;

[34] FIG. 3 is a side sectional view illustrating a coupling status of FIG. 2;

[35] FIG. 4 is a schematic cross sectional view taken along line IV-IV;

[36] FIG. 5 is a schematic cross sectional view taken along line V-V;

[37] FIG. 6 through FIG. 8 are enlarged cross sectional view illustrating a assembling method of horizontal frames and vertical frames of the boltless sectional shelving unit according to the present invention;

[38] FIG. 9 and FIG. 10 are a schematic exploded perspective view and a front sectional view illustrating a boltless sectional shelving unit according to another embodiment of the present invention respectively;

[39] FIG. 11 is a schematic exploded perspective view illustrating a boltless sectional shelving unit according to further another embodiment of the present invention;

[40] FIG. 12 is an enlarged sectional view illustrating a coupling status of FIG. 12;

[41] FIG. 13 is a schematic sectional view illustrating a connecting status of a plurality of shelving unit according to further another embodiment of the present invention;

[42] FIG. 14 is a schematic exploded perspective view illustrating a boltless sectional shelving unit according to further another embodiment of the present invention;

[43] FIG. 15 is a schematic planar view illustrating a coupling status of FIG. 14;

[44] FIG. 16 is a schematic planar view illustrating a fabricating method of a connecting vertical frame of FIG. 14;

[45] FIG. 17 is a schematic exploded perspective view illustrating a boltless sectional shelving unit according to further another embodiment of the present invention; and

[46] FIG. 18 is a sectional view illustrating a coupling status of FIG. 17.

Best Mode for Carrying Out the Invention

[47] A preferred embodiment of the invention will be described in detail below with reference to the accompanying drawings.

[48] FIG. 1 is a perspective view illustrating a boltless sectional shelving unit according to the present invention, FIG. 2 is an exploded perspective view illustrating the principal part of a boltless sectional shelving unit according to the present invention, FIG. 3 is a side sectional view illustrating a coupling status of FIG. 2, FIG. 4 is a schematic cross sectional view taken along line IV-IV, and FIG. 5 is a schematic cross sectional view taken along line V-V.

[49] As shown in FIG. 1 through FIG. 5, the boltless sectional shelving unit according to the present invention basically takes the form of a latticed shelving frame 1. The shelving frame 1 includes four vertical frames 10, a plurality of horizontal frames 20, and a plurality of shelving plates 30 for supporting articles stratified on the shelving frame 1 at a proper height.

[50] The vertical frames 10 are made of a metal plate having a predetermined thickness.

Each vertical frame 10 includes a pair of supporting portions 11 of an angle bar type integrally and vertically bent to each other along a center of the width direction thereof.

[51] Each supporting portion 11 includes a plurality of hangers 12 and a plurality of coupling holes 13 reciprocally formed thereon at a predetermined interval in the lengthwise direction. That is, the plurality of hangers 12 is formed at each supporting portion 11 at a predetermined interval and the plurality of coupling holes 13 is formed at each center of spaces betweens each hanger 12.

[52] Each hanger 12 is integrally formed at each supporting portion 11 of the vertical frame 10 through a lancing process. Here, the hanger 12 is protruded in the broken direction (inside thereof).

[53] The shape of the hanger 12 may be varied. Preferably, as shown in the drawings, it takes the form of an approximate "L" type from a cross sectional point of view (sectional direction of the vertical frame). That is, the hanger 12 includes a latching portion 12a vertically protruded toward an inside of the supporting portion 11 and inserted into an upper slit 22 or a lower slit 23 of the horizontal frame 20 and a pressing portion 12b for grasping the horizontal frame 20 together with the supporting portion 11 vertically bent from a front end of the latching portion 12a toward other supporting portion 11.

[54] Here, the thickness of the hanger 12 is located in the horizontal direction and the width of the hanger 12 is located lengthwise. Accordingly, the bucking stress of the hanger 12 can be increased owing to the load thereof and the movement between the horizontal frame 20 and the vertical frame 10 can be minimized after the assembling thereof, thereby obtaining the convenience in terms of use.

[55] In the meantime, in order to easily insert the horizontal frame 20 into the hanger 12 of the supporting portion 11 and strongly grasp the horizontal frame 20 after the insertion thereof, preferably, the pressing portion 12b of the hanger 12 is in the form of an arc type in that the inner surface thereof (surface contacting with the horizontal frame 20) is convexly bent centering around the left and right axis (horizontal axis) thereof.

[56] Here, it is preferred that the interval between the pressing portion 12b of the hanger

12 and the supporting portion 11 is identical with or slightly smaller than the thickness of the horizontal frame 20 so as to strongly combine the horizontal frame 20 with the vertical frame 10.

[57] The horizontal frames 20 are made of a metal plate having a predetermined thickness. Each horizontal frame 20 includes a supporting flange 21 for placing the shelving plate 30 thereon and vertically bent and formed thereon.

[58] Also, the horizontal frame 20 further includes a plurality of upper and lower slits 22 and 23 for inserting the latching portions 12a of the adjacent two hangers 12 therein and formed thereon at a predetermined interval in the lengthwise direction.

[59] Here, a pair of the upper and lower slits 22 and 23 are vertically separated from each other. Also, each lower slit 23 is retractably formed at the lower end portion of the horizontal frame 20 at a predetermined height.

[60] Also, an assembling hole 24 of a large rectangular type having a larger size than the pressing portion 12b of the hanger 12 is formed at the lower portion of the upper slit 22 so as to penetrate the hanger 12 therethrough. The upper slit 22 is retractably and upward formed at the center of the upper end of the assembling hole 24 at a predetermined height.

[61] Accordingly, the upper slit 22 is formed at the center of the upper end of the assembling hole 24, so that both end portions of the horizontal 20 can be accurately assembled to two hangers 12 of the right and left vertical frames 10, which are opposed to each other. Also, as though the horizontal frame 20 is cut at an arbitrary length, it can be easily assembled to the hangers 12 of two vertical frames 10. [62] Here, it is preferred that the upper end portion of the assembling hole 24, that is, both side end portions of the entrance of the upper slit 22, is upward slanted toward the upper slit 22.

[63] Also, a plurality of coupling holes 25 is formed at the supporting flange 21 between the upper and lower slits 22 and 23 at a predetermined distance. Here, the coupling hole 25 takes the form of a long hole having an optimum length so as to accept an assembling error between the horizontal frame 20 and the vertical frame 10 or another horizontal frame 20.

[64] The shelving plate 30 is made of a metal plate or a wooden plate having a predetermined thickness. Here, if necessary, the shelving plate 30 can be strongly fixed to the shelving frame 1 through the coupling holes 25, which are formed at the supporting flange 21 of the horizontal frame 20, by means of bolt (not shown) and so forth.

[65] In the meantime, the shelving frame 1 according to the present invention can be strongly assembled through only the hangers of the vertical frames 10 and the upper and lower slits 22 and 23 of the horizontal frames 20. However, a plurality of auxiliary coupling holes 14 and 26, which is coupled to each other during the assembling thereof, is further formed at the vertical frames 10 and the horizontal frames 20, so that the vertical frames 10 and the horizontal frames 20 can be completely and integrally fixed to each other.

[66] Here, in addition to the above function of the auxiliary coupling holes 14 and 26, they can be utilized as a coupling means for attaching various accessories such as a ring for hanger etc.

[67] An operation of the shelving frame 1 according to the present invention will be described in detail below.

[68] FIG. 6 through FIG. 8 are enlarged cross sectional view illustrating a assembling method of horizontal frames and vertical frames of the boltless sectional shelving unit according to the present invention.

[69] Firstly, as shown in FIG. 6, the supporting flange 21 of the horizontal frame 20 is located at the inside thereof and then, the hangers 12 of the horizontal frame 10 is inserted into the outermost assembling holes 24, which are located at both end portions of the horizontal frame 20.

[70] Then, as shown in FIG. 7, the upper hanger 12 is passed through the assembling hole

24 of the horizontal frame 20 and the lower hanger 12 is transversely located below the lower end of the horizontal frame 20.

[71] At this time, if the horizontal frame 20 is pressed down, as shown in FIG. 8, the latching portions 12a of the adjacent two hangers 12 of the vertical frame 10 are inserted into the upper and lower slits 22 and 23 of the horizontal frame 20 respectively. [72] Continuously, the horizontal frame 20 is inserted between the pressing portions 12b bent to the front end of each hanger 12 and the supporting portion 11. Here, since the interval between the pressing portion 12b of the hanger 12 and the supporting portion 11 is identical with or slightly smaller than the thickness of the horizontal frame 20, the horizontal frame 20 can be closely and strongly inserted to the vertical frame 10, thereby maintaining a very strong coupling status.

[73] In this manner, four vertical frames 10 is coupled to the plurality of the horizontal frames 20, so that it can obtain the shelving frame 1, which takes the form of a multilayer rack having a predetermined height.

[74] Then, the shelving plates 30 are placed on the supporting flanges 21 formed at each layer of the horizontal frame 20. At this time, if necessary, the shelving plate 30 can be strongly fixed to the shelving frame 1 through the coupling holes 25 of the supporting flanges 21 by means of screw and so forth.

[75] In the boltless sectional shelving unit according to the present invention, since the plurality of hangers 12 is continuously formed on the vertical frame 10 at a predetermined interval in the lengthwise direction and the pair of upper and lower slits 22 and 23 is continuously formed on the horizontal frame 20 at a predetermined interval in the lengthwise direction, the vertical frames 10 and the horizontal frames can be assembled to each other through an appropriate cutting process of the raw materials having a predetermined length on the spot without coming up to standards, whereby simply constructing the shelving frame 1 having a desired size.

[76] That is, since the pair of upper and lower slits 22 and 23 is formed on the horizontal frame 20 at a predetermined interval and the assembling hole 24 for allowing the hanger 12 assembled to the upper slit 22 to be passed therethrough is symmetrically formed centering around the upper slit 22, if the middle portion of the upper and lower slits 22 and 23 of the raw materials of the adjacent horizontal frames 20 is cut, the upper and lower slits 22 and 23 located at both end portions of the cut horizontal frame 20 can be coupled to the hangers 12 of two vertical frames 10 without being relation to the length of the horizontal frame 20, thereby easily fabricating the shelving frame 1 having a desired size.

[77] FIG. 9 and FIG. 10 are a schematic exploded perspective view and a front sectional view illustrating a boltless sectional shelving unit according to another embodiment of the present invention respectively.

[78] The boltless sectional shelving unit according to another embodiment of the present invention includes the plurality of hangers 12 and the upper and lower slits 22 and 23 for coupling the vertical and horizontal frames 10 and 20 to each other as well as the plurality of coupling holes 13 and 24 formed on the vertical and horizontal frames 10 and 20 at a predetermined interval. [79] Also, as shown in FIG. 9 and FIG. 10, the boltless sectional shelving unit according to another embodiment of the present invention further includes several auxiliary horizontal frames 20a.

[80] Accordingly, the vertical frame 10 and the several auxiliary horizontal frames 20a are coupled to each other through the coupling holes 13 and 24 by means of the bolts 40 and the nuts 41, thereby constituting auxiliary shelving units Ia formed at the outside of the completed shelving frame 1.

[81] FIG. 11 is a schematic exploded perspective view illustrating a boltless sectional shelving unit according to further another embodiment of the present invention, FIG. 12 is an enlarged sectional view illustrating a coupling status of FIG. 12, and FIG. 13 is a schematic sectional view illustrating a connecting status of a plurality of shelving unit according to further another embodiment of the present invention.

[82] As shown in FIG. 11 through FIG. 13, the boltless sectional shelving unit according to further another embodiment of the present invention further includes a plurality of connecting slots 27 formed at a corner of each vertical frame 10 at a predetermined interval in the lengthwise direction and a plurality of connecting horizontal frames 50 for integrally connecting two shelving units 1 to each other through the connecting slots 27 of the adjacent two vertical frames 10 and additionally forming loading spaces between two shelving units 1.

[83] Here, each connecting horizontal frame 50 includes a pair of latching protrusions 51 of a "L" type formed at both end portions thereof and inserted into two connecting slots 27 of the adjacent vertical frames 10.

[84] Also, each connecting horizontal frame 50 further includes a supporting flange 52 for supporting the shelving plate 30 vertically extended to an upper end portion thereof and separation preventing pieces 53 for preventing a separation of the shelving plate 30 vertically protruded from the upper end portion of the connecting horizontal frame 50 through a lancing process.

[85] According to the boltless sectional shelving unit of further another embodiment of the present invention, two shelving units 1 can be integrally and easily coupled to each other without a separate coupling means such as the bolt and so on and the loading spaces of a multilayer shape can be formed between two shelving units 1 without forming additional vertical frames 10.

[86] FIG. 14 is a schematic exploded perspective view illustrating a boltless sectional shelving unit according to further another embodiment of the present invention, FIG. 15 is a schematic planar view illustrating a coupling status of FIG. 14, and FIG. 16 is a schematic planar view illustrating a fabricating method of a connecting vertical frame of FIG. 14.

[87] As shown in FIG. 14 through FIG. 16, the boltless sectional shelving unit according to further another embodiment of the present invention further includes at least a pair of connecting vertical frames 60 of an approximate "T" shape for connecting two horizontal frames 20 together in addition to the construction of the first embodiment according to the present invention as described above.

[88] The connecting vertical frames 60 of an approximate "T" shape includes two intermediate supporting portions 61 integrally come in contact with each other and two side supporting portions 62 vertically and reciprocally bent to a front end of each intermediate supporting portion 61 in the opposite direction.

[89] In the same manner, the intermediate supporting portion 61 and the side supporting portion 62 includes a plurality of hangers 63 and a plurality of coupling holes 64 for coupling to the upper and lower slits 22 and 23 of the horizontal frame 20 reciprocally formed thereon at a predetermined interval in the lengthwise direction.

[90] As shown in FIG. 16, the connecting vertical frame 60 is manufactured in such a manner that the plural pairs of opposed hangers 63 are vertically formed at both sides of a metal plate having a predetermined thickness and then, symmetrically bent to each other in the opposite direction along a center of the width direction thereof.

[91] As shown in FIG. 15, the pair of the connecting vertical frames 60 are arranged between two pairs of the vertical frames 10 and the plurality of horizontal frames 20 is coupled to each other through the hangers 12 and 63 and the upper and lower slits 23, so that the plurality of the loading spaces having a predetermined width can be continuously formed at one shelving unit 1.

[92] FIG. 17 is a schematic exploded perspective view illustrating a boltless sectional shelving unit according to further another embodiment of the present invention and FIG. 18 is a sectional view illustrating a coupling status of FIG. 17.

[93] As shown in FIG. 17 and FIG. 18, the boltless sectional shelving unit according to further another embodiment of the present invention further includes a shelving plate 70 of a metal plate type having a plurality of skirts 71 formed at four sides thereof and other upper and lower slits 72 and 73, which are identical with the upper and lower slits 22 and 23 of the horizontal frame 20, formed in the vicinity of both end portions of each skirt 71.

[94] In the same manner, the upper slit 72 is also, retractably and upward formed at the center of the upper end of the assembling hole 74 at a predetermined height and the lower slit 73 is retractably and vertically formed at the lower end portion of the skirt 71 on the same line as the upper slit 72.

[95] Accordingly, the shelving plate 70 of the metal plate can be directly coupled to four vertical frame 10 through the upper and lower slits 72 and 73 of each skirt 71 formed at the shelving plate 70 without the separate horizontal frame 20 dissimilarly with the first embodiment of the present invention as described above. Therefore, the horizontal frames 20 can be eliminated.

[96] However, since each vertical frame 10 should be inserted into the shelving plate 70, it is preferred that the shelving plate 70 of the metal plate type is located at only the uppermost and lowermost layers of the multilayer shelving plate. That is, in the intermediate layer thereof, it is preferred that the above horizontal frames 20 are directly coupled to the shelving plate 30.

[97] Accordingly, since the number of the horizontal frames 20 can be remarkably decreased, it can cut down the cost.

[98] While this invention has been described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments and the drawings, but, on the contrary, it is intended to cover various modifications and variations within the spirit and scope of the appended claims. Industrial Applicability

[99] The present invention relates to a boltless sectional shelving unit in that vertical frames and horizontal frames of the shelving unit for supporting a plurality of shelving plates in multilayer structure can be strongly assembled to each other without using separate bolts and the shelving unit can be easily formed at an arbitrary length on the spot.

Claims

[1] A boltless sectional shelving unit comprising: four vertical frames comprising a pair of supporting portions of an angle bar type integrally and vertically bent to each other, a plurality of hangers and a plurality of coupling holes protruded toward an inside of each supporting portion and reciprocally formed thereon at a predetermined interval in the lengthwise direction and each hanger having a latching portion vertically protruded toward an inside of the supporting portion and a pressing portion for grasping a horizontal frame together with the supporting portion horizontally bent from a front end of the latching portion; a plurality of the horizontal frames for connecting adjacent two vertical frame to each other comprising a plurality of assembling holes for penetrating the hangers therethrough formed in the length direction thereof at a predetermined interval, a plurality of upper slits for inserting the latching portions therein formed vertically at a center of an upper end of each assembling hole, a plurality of lower slits for inserting the latching portions therein retractably and upward formed at a lower end thereof collinearly with each upper slit, a plurality of supporting flanges formed at upper end portion thereof, and a plurality of coupling holes formed at each supporting flange between the upper and lower slits at a predetermined distance; and a plurality of shelving plates placed on the supporting flanges, which are formed at each layer of the horizontal frames connected to the vertical frames.

[2] A boltless sectional shelving unit as claimed in claim 1, wherein the pressing portion of each hanger is in the form of an arc type.

[3] A boltless sectional shelving unit as claimed in claims 1 or 2, wherein the upper end portion of the assembling hole is upward slanted toward the upper slit.

[4] A boltless sectional shelving unit as claimed in claim 1, further comprising a plurality of connecting slots formed at a corner of each vertical frame at a predetermined interval and a plurality of connecting horizontal frames having a pair of latching protrusions formed at both end portions thereof and inserted into two connecting slots of the adjacent vertical frames, and other supporting flanges formed at an upper end portion thereof.

[5] A boltless sectional shelving unit as claimed in claim 4, wherein a plurality of separation preventing pieces is formed at the supporting flange of each connecting horizontal frame.

[6] A boltless sectional shelving unit as claimed in claim 1, further comprising at least two connecting vertical frames of "T" type having two intermediate supporting portions integrally come in contact with each other and two side supporting portions vertically and reciprocally bent to a front end of each intermediate supporting portion in the opposite direction, a plurality of hangers and a plurality of coupling holes protruded toward an inside of each supporting portion and reciprocally formed thereon at a predetermined interval in the lengthwise direction and each hanger having a latching portion vertically protruded toward an inside of the supporting portion and a pressing portion for grasping a horizontal frame together with the supporting portion horizontally bent from a front end of the latching portion.

[7] A boltless sectional shelving unit as claimed in claim 1, further comprising another shelving plate of a metal plate type formed at an uppermost and lowermost layers of a multilayer shelving plate, the shelving plate having a plurality of skirts formed at four sides thereof, other assembling holes penetrated the hangers therethrough formed at both end portions, other upper slits for inserting the latching portions therein formed vertically at a center of an upper end of each assembling hole, a plurality of lower slits for inserting the latching portions therein retractably and upward formed at a lower end of each skirt collinearly with each upper slit.