SHELF CONNECTION DEVICE

Abstract

A shelf connector, comprising: a first clamping device comprising a fastening element (100) and a first plastic connector (200) connected to each other, wherein the fastening element (100) has a fastening hole (110) and the first plastic connector (200) has a fitting groove; a second clamping device comprising a washer (600) and a second plastic connector (300) connected to each other, wherein the washer (600) has a mounting hole (610), the second plastic connector (300) has a connecting hole (400) and a fitting block (310), and the fitting groove is positively and slidably connected to the fitting block (310); and a screw (700) that penetrates the mounting hole (610), the connecting hole (400) and the fastening hole (110) and is connected to the fastening hole (110) by means of a thread.

Description

TECHNICAL AREA

[0001] The present disclosure relates to the technical field of shelf connection and in particular to a shelf connection device. BACKGROUND

[0002] Shelving is needed in places like warehouses, shops, logistics centers, and express shipping facilities to store, preserve, display, and sell goods and shipments. A single shelf often cannot meet the usage requirements due to insufficient space, so in most cases, the shelf is not used alone. In most usage scenarios, several shelves are used together. A single, independent shelf cannot form a load-bearing overall structure without a connecting device, so the shelf is prone to tipping or even collapse due to local overloading or collision. Furthermore, adjacent shelves can also easily rotate relative to each other due to impacts. Therefore, adjacent shelves often need to be connected by a connector. In the prior art, shelves can be formed by joining several crossbars, vertical bars, and connectors.It appears as if there are many shelves, but they actually form a single unit. Furthermore, several holes must be pre-drilled, and a predetermined number of crossbars and vertical bars must be prepared according to the design requirements, resulting in cumbersome handling and a high risk of errors. Additionally, another system involves directly connecting independent shelves to another shelf using multiple connectors. However, the fasteners of the existing connectors are prone to rotation around a screw, leading to inefficient locking. Moreover, all components of the existing connectors are machined from metal, resulting in complex processing and relatively high costs. SUMMARY

[0003] The present disclosure aims to solve at least one of the technical problems in the prior art. To this end, the present disclosure proposes a shelf connector device that prevents rotation of a fastener by means of a first plastic connector and a second plastic connector, saves metal materials and costs, and is easy to process.

[0004] According to one embodiment of the present disclosure, the shelf connection device comprises: • a first clamping device comprising a fastening element and a first plastic connector connected to each other, wherein the fastening element has a fastening hole and the first plastic connector has a fitting groove; • a second clamping device comprising a washer and a second plastic connector connected to each other, the washer having a mounting hole, the second plastic connector having a connecting hole and a fitting block, and the fitting groove being positively and slidably connected to the fitting block; and • a screw that penetrates the mounting hole, the connecting hole and the fastening hole, wherein the screw is connected to the fastening hole by means of a thread.

[0005] According to one embodiment of the present disclosure, the shelf connection device has at least the following advantageous effects.

[0006] The first and second plastic connectors can be manufactured using integrated injection molding or similar processes, making them easy to handle. They also have a uniform appearance and structure, resulting in significant cost savings due to the use of plastic material. Because the locating groove of the first plastic connector is positively and slidably connected to the locating block of the second plastic connector, the first clamping device is displaceable along one direction of the locating groove relative to the second clamping device. This means the fastener is displaceable along the direction of the locating groove relative to the washer, thus preventing rotation of the fastener around the washer.Turning the screw changes the distance between the fastener and the screw head, preventing the fastener from rotating with the screw. Turning the screw to decrease the distance between the fastener and the washer can clamp a shelf component positioned between the fastener and the washer, creating a secure connection between two shelves.The fastener, washer, and screw, which bear a key force in the clamping connection, are made of metal, thus ensuring that the connection strength of the shelf connector is not reduced; while the first plastic connector and the second plastic connector, which position and guide the direction of movement of the fastener and prevent rotation of the fastener around the washer, are made of plastic, so that this does not affect the connection strength of the shelf connector, but also saves metal materials and is convenient and easy to process.

[0007] According to one embodiment of the present disclosure, the shelf connector further comprises a first spring. One end of the first spring is connected to the second plastic connector, and the other end of the first spring is connected to the fastener.

[0008] According to the shelf connector in one embodiment of the present disclosure, the first spring is a tension spring with two hooks. A top surface of the second plastic connector has a first fastening groove. A bottom surface of the connector has a second fastening groove. One end of the first spring is hooked into the first fastening groove, and the other end of the first spring is hooked into the second fastening groove.

[0009] According to the shelf connector in one embodiment of the present disclosure, the first plastic connector is pluggably connected to the second plastic connector. The first plastic connector has a spring channel. An upper surface of the connecting hole communicates with the first fastening groove. The first spring penetrates the connecting hole. An upper end of the first spring is connected to the first fastening groove from the upper surface of the connecting hole, and a lower end of the first spring extends from a lower end of the connecting hole through the spring channel to an outer surface of the fastener and is connected to the second fastening groove.

[0010] According to the shelf connector in one embodiment of the present disclosure, both sides of the second plastic connector each have an opposing snap lock. Both sides of the washer each have an opposing clamping groove. The snap lock is detachably and positively connected to the clamping groove.

[0011] According to the shelf connection device in one embodiment of the present disclosure, a connection direction of the two snap locks is parallel or perpendicular to a longitudinal direction of the fastening element.

[0012] According to the shelf connector in one embodiment of the present disclosure, the fitting groove comprises a first groove position and a second groove position spaced 90 degrees apart along a circumferential direction of the first plastic connector. The fitting block can be positively and slidably connected to the first groove position and the second groove position, such that the connection direction of the two snap closures of the second plastic connector is parallel or perpendicular to the longitudinal direction of the fastener.

[0013] According to the shelf connection device in an embodiment of the present disclosure, the first plastic connector has an inclined ramp between the first groove position and the second groove position, and the fitting block is movable between the first groove position and the second groove position by means of the inclined ramp.

[0014] According to the shelf connector in one embodiment of the present disclosure, both sides of the fastening element each have an opposing connecting groove. Both sides of the first plastic connector each have an opposing connecting block. The connecting block can be positively engaged with the connecting groove.

[0015] According to the shelf connection device in an embodiment of the present disclosure, a top surface of the fastening element has a plurality of teeth.

[0016] Additional aspects and benefits of this disclosure are partly specified in the following description and will be evident from the following description or learned through the application of this disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above-mentioned and / or additional aspects and advantages of the present disclosure will become apparent and easily understandable from the description of the embodiments in conjunction with the following drawings, in which: Fig. 1 a perspective view of a shelf connection device according to an embodiment of the present disclosure; Fig. 2 a perspective view of a first plastic connector, a second plastic connector, a first spring and a fastening element of a shelf connection device according to an embodiment of the present disclosure; Fig. 3 a perspective view from another perspective of a first plastic connector, a second plastic connector, a first spring and a fastening element of a shelf connection device according to an embodiment of the present disclosure; Fig. 4 is an exploded view of a shelf connection device according to an embodiment of the present disclosure; Fig. 5 is an exploded view from another perspective of a shelf connection device according to an embodiment of the present disclosure; and Fig. 6 is a perspective view of a fastening element of a shelf connection device with a rotation by 90 degrees according to an embodiment of the present disclosure. Reference symbol:

[0018] Fastening element 100; fastening hole 110; second fastening groove 120; connecting groove 130; tooth 140; first plastic connector 200; first groove position 210; second groove position 220; inclined ramp 230; spring channel 240; connecting block 250; second plastic connector 300; fitting block 310; first mounting groove 320; snap lock 330; stop projection 340; Connection hole 400; first spring 500; Washer 600; Mounting hole 610; Clamping groove 620; Screw 700; second spring 710. DETAILED DESCRIPTION

[0019] The embodiment of the present disclosure is described in detail below. The embodiment is illustrated in the drawings, and the same or similar numbers denote the same or similar elements, or elements with the same or similar function, throughout the document. The embodiment described with reference to the drawings is exemplary and serves only to illustrate the present disclosure and not to limit it.

[0020] In the description of this disclosure, it should be understood that the directional or positional relationships indicated by the terms "top," "bottom," "front," "back," "left," and "right," etc., refer to the directional or positional relationships shown in the drawings only to facilitate the present disclosure and simplify the description, and do not indicate or imply that the device or element in question necessarily has a particular orientation and must be designed and operated in that particular orientation. Therefore, these terms should not be understood as limitations of this disclosure.

[0021] In the description of this disclosure, “several” means one or more, “a multitude” means more than two, “greater than”, “less than”, “above”, etc. are understood to exclude the specified number, and “above”, “below”, “within”, etc. are understood to include the specified number. The described “first” and “second” are used solely to distinguish technical features and are not to be understood as indicating or implying relative importance, the number of technical features shown, or the precedence relationship of the technical features shown.

[0022] Unless otherwise stated, in the description of this disclosure, terms such as "arrange", "assemble", "connect", etc. are to be understood in a general sense. Those skilled in the art can reasonably determine the specific meaning of the terms in this disclosure in conjunction with the specific content of the technical solution.

[0023] With reference to the Fig. Figures 1 to 6 provide an embodiment of the present disclosure, a shelf connector comprising a first clamping device, a second clamping device, and a screw 700. The first clamping device comprises a fastener 100 and a first plastic connector 200, which are connected to each other. The fastener 100 has a mounting hole 110, and the first plastic connector 200 has a locating groove. For example, the mounting hole 110 has an internal thread. The second clamping device comprises a washer 600 and a second plastic connector 300, which are connected to each other. The washer 600 has a mounting hole 610, and the second plastic connector 300 has a connecting hole 400 and a locating block 310.The locating groove is positively and slidably connected to the locating block 310, so that the first plastic connector 200 slides along one direction of the locating groove relative to the second plastic connector 300. For example, the first plastic connector 200 and the second plastic connector 300 are arranged between the fastener 100 and the washer 600, such that the first plastic connector 200 is connected to the fastener 100 and the second plastic connector 300 is connected to the washer 600. Therefore, the fastener 100 is able to slide along the direction of the locating groove relative to the washer 600, and the fastener 100 is prevented from rotating around the washer 600. For example, the mounting hole 110, the connecting hole 400, and the mounting hole 610 are arranged coaxially one after the other.The screw 700 penetrates the mounting hole 610, the connecting hole 400 and the fastening hole 110, the screw 700 being further connected to the fastening hole 110 by means of a thread.

[0024] It should be noted that the upper side in the present disclosure refers to a direction near a head of the screw 700, and the lower side in the present disclosure refers to a direction near the fastening element 100.

[0025] In one embodiment, the fastener 100 is connected to a threaded end of the screw 700 via the threaded mounting hole 110. The head of the screw 700 is positioned above the washer 600, and the first plastic connector 200, the second plastic connector 300, and the washer 600 are enclosed between the fastener 100 and the head of the screw 700. The fastener 100 has a long side and a short side, and both ends of the fastener 100 are configured to compress an inside side of the frame of each of the two shelves along a longitudinal direction (i.e., a direction along the long side). The fastener 100 is placed on the inside of the frame of each of the two shelves, and the washer 600 is placed on an outside side of the frame of each of the two shelves.Therefore, the screw 700 allows the fastener 100 to move towards the washer 600, so that the fastener 100 and the washer 600 can each compress and join the inside and outside of the frames of the two shelves to achieve a tight connection between the two shelves.

[0026] In one embodiment, the first plastic connector 200 and the second plastic connector 300 can be made from plastics such as polyoxymethylene, polyvinyl chloride and polypropylene.

[0027] Preferably the fastener 100, the washer 600 and the screw 700 are made of metal.

[0028] The first plastic connector 200 and the second plastic connector 300 are made of plastic, allowing them to be manufactured by integrated injection molding or similar processes. This results in a simple processing procedure, a uniform appearance and structure, and significantly reduces costs. Since the locating groove of the first plastic connector 200 is positively and slidably connected to the locating block 310 of the second plastic connector 300, the first clamping device is able to slide along the direction of the locating groove relative to the second clamping device. That is, the fastener 100 is able to slide along the direction of the locating groove relative to the washer 600. Therefore, the fastener 100 is prevented from rotating around the washer 600.When screw 700 is turned, the distance between fastener 100 and the head of screw 700 can be changed to prevent fastener 100 from rotating with screw 700. When screw 700 is turned to reduce the distance between fastener 100 and washer 600, a shelf component positioned between fastener 100 and washer 600 can be clamped to create a secure connection between the two shelves. Fastener 100, washer 600, and screw 700 are made of metal to withstand the force of the clamping connection, ensuring that the strength of the shelf connection is not reduced.Meanwhile, the first plastic connector 200 and the second plastic connector 300 are made of plastic to provide a function for positioning and guiding the direction of movement of the fastener 100 and to limit the rotation of the fastener 100 around the washer 600. Therefore, this does not affect the connection strength of the shelf connector, but also saves metal materials and is convenient and easy to work with.

[0029] According to some embodiments of the present disclosure, with reference to the Fig. 1 to 5, the shelf connecting device further comprises a first spring 500. One end of the first spring 500 is connected to the second plastic connector 300, and the other end of the first spring 500 is connected to the fastener 100. A tensile force of the first spring 500 can be used to pull the fastener 100 and the second plastic connector 300 together, and in turn to pull the fastener 100 and the washer 600 together, so that when the fastener 100 is placed on an inside of the frame of each of the shelves and the washer 600 is placed on an outside of the frame of each of the shelves, the tensile force of the first spring 500 enables the fastener 100 and the washer 600 to pre-clamp the frame of each of the shelves.

[0030] Furthermore, with reference to the Fig. 4 to 5, the first spring 500 is a tension spring with two hooks. A first mounting groove 320 is located on a top side of the second plastic connector 300. A second mounting groove 120 is located on a bottom side of the fastener 100. One end of the first spring 500 is hooked into the first mounting groove 320, and the other end of the first spring 500 is hooked into the second mounting groove 120 to improve reliability when the first spring 500 exerts a tensile force on the fastener 100 and the second plastic connector 300.

[0031] Furthermore, the first plastic connector 200 is connected to the second plastic connector 300 in a pluggable manner. The first plastic connector 200 has a spring channel 240. An upper surface of the connecting hole 400 is connected to the first fastening groove 320. The first spring 500 penetrates the connecting hole 400. An upper end of the first spring 500 is connected from the upper surface of the connecting hole 400 to the first fastening groove 320, and a lower end of the first spring 500 extends from a lower end of the connecting hole 400 through the spring channel 240 to an outer surface of the fastening element 100 and is connected to the second fastening groove 120. In one embodiment, the spring channel 240 is located below the lower end of the connecting hole 400, so that the lower end of the first spring 500 can run from the lower end of the connecting hole 400 to the spring channel 240 and pass through to the outside of the fastening element 100.In one embodiment, the lower end of the first spring 500 extends through the spring channel 240 to the outside of the first plastic connector 200, passes through one side of the fastener 100, and is finally connected to the second fastening groove 120. The first spring 500 penetrates the connecting hole 400, thereby improving reliability and stability when the first spring 500 provides tensile force.

[0032] It is understood that in some other embodiments a stop projection 340 is arranged under a central part of the second plastic connector 300 to limit the shortest distance between the first plastic connector 200 and the second plastic connector 300 and to ensure a certain distance between the fastener 100 and the washer 600 in order to facilitate the placement of the fastener 100 on the inside of the frame of each shelf and to further reduce material costs.

[0033] According to some embodiments of the present disclosure, with reference to the Fig. 2 to 5, several opposing snap locks 330 are arranged on both sides of the second plastic connector 300. Both opposite sides of the washer 600 each have a clamping groove 620. The multiple snap locks 330 are detachably connected to the multiple clamping grooves 620 in a form-fitting manner, thereby improving the ease of assembly between the second plastic connector 300 and the washer 600.

[0034] Furthermore, with reference to Fig. 1, a connection direction of two snap locks 330 perpendicular to a longitudinal direction of the fastening element 100. A bottom surface of the metal washer 600 and a top surface of the fastening element 100 clamp the frame of each shelf together, thereby increasing the clamping friction force.

[0035] In some other embodiments, the connection direction of the two snap fasteners 330 is parallel to the longitudinal direction of the fastening element 100. Several bottom surfaces of the plastic snap fasteners 330 and the top of the fastening element 100 clamp the frame of each shelf together, thereby reducing scratches on the frame of each shelf.

[0036] Furthermore, with reference to the Fig. 4 and Fig. 5, the fitting groove has a first groove position 210 and a second groove position 220, which are spaced apart by 90 degrees along a circumferential direction of the first plastic connector 200, and the fitting block 310 can be positively and slidably connected to the first groove position 210 or the second groove position 220, such that the connection direction of the two snap closures 330 of the second plastic connector 300 is parallel or perpendicular to the longitudinal direction of the fastening element 100. In one embodiment, with reference to Fig. 1. When the fitting block 310 is positively connected to the first groove position 210, the connection direction of the two snap locks 330 of the second plastic connector 300 is perpendicular to the longitudinal direction of the fastener 100, and the bottom surface of the metal washer 600 and the top surface of the fastener 100 clamp the frame of each shelf together. With reference to Fig. 6, when the fitting block 310 is positively connected to the second groove position 220, the connection direction of the two snap locks 330 of the second plastic connector 300 is parallel to the longitudinal direction of the fastening element 100, and a bottom surface of each of the two plastic snap locks 330 and the top of the fastening element 100 clamp the frame of each shelf together.

[0037] Furthermore, with reference to the Fig. 4 and Fig. 5, the first plastic connector 200 has an inclined ramp 230 between the first groove position 210 and the second groove position 220, and the fitting block 310 can move via the inclined ramp 230 from the first groove position 210 to the second groove position 220 or from the second groove position 220 to the first groove position 210. In one embodiment, with reference to the Fig. 4 and Fig. 5. The inclined ramp 230 is inclined from the second groove position 220 to the first groove position 210. When the fitting block 310 is in the second groove position 220, the screw 700 can be pressed to move towards the washer 600, so that the second groove position 220 moves away from the fitting block 310 and is eventually separated from it. At this point, the screw 700 can be easily rotated from the second groove position 220 to the first groove position 210, so that, with the aid of the inclined ramp 230, the first groove position 210 can slide to a position of the fitting block 310 to clamp the fitting block 310, thus quickly switching from the bottom surface of the metal washer 600 to the top of the fastener 100 for clamping.When the fitting block 310 is in the first groove position 210, the screw 700 can be pressed to move towards the washer 600, so that the first groove position 210 moves away from the fitting block 310 and is eventually separated from it. At this point, the screw 700 can be forcefully turned from the first groove position 210 to the second groove position 220, so that the second groove position 220 slides into the position of the fitting block 310 to clamp it, thus quickly moving from the bottom surface of each of the two plastic snap fasteners 330 to the top of the fastener 100 for clamping.

[0038] It is understandable that, because one end of the first spring 500 is connected to the second plastic connector 300 and the other end of the first spring 500 is connected to the fastener 100, the tensile force of the first spring 500 causes the fitting block 310 of the second plastic connector 300 to remain in the first groove position 210 or the second groove position 220 of the first plastic connector 200 and to be locked in order to prevent the first plastic connector 200 from rotating around the second plastic connector 300, and in turn to prevent the fastener 100 from rotating around the washer 600.

[0039] The preferred solution is, with reference to Fig. 1. The underside of each of the two snap locks 330 is closer to the fastener 100 than the underside of the washer 600. That is, the underside of each of the two snap locks 330 is located beneath the underside of the washer 600. When the fitting block 310 is positively engaged with the first groove position 210, the distance between the bottom surface of the metal washer 600 and the top of the fastener 100 is large. When the fitting block 310 is positively engaged with the second groove position 220, the distance between the bottom surface of each of the two plastic snap locks 330 and the top of the fastener 100 is small. Therefore, the maximum and minimum clamping distance of the shelf connector can be easily switched to accommodate shelf frames of varying thicknesses.

[0040] According to some embodiments of the present disclosure, with reference to the Fig. 4 and Fig. 5. Both sides of the fastening element 100 have opposing connecting grooves 130. Both sides of the first plastic connector 200 have opposing connecting blocks 250, which can be positively connected via the connecting groove 130. The first plastic connector 200 is conveniently connected to the fastening element 100 by means of the connecting block 250 and the connecting groove 130.

[0041] According to some embodiments of the present disclosure, with reference to the Fig. 2 and Fig. 4, the top of the fastening element 100 has a plurality of teeth 140 to increase a compressive friction force of the fastening element 100 on the frame of each shelf and thereby improve the connection effect.

[0042] The preferred solution is the multitude of teeth 140 offset teeth, in which several acute angles are formed to further improve the compressive friction force of the fastening element 100 on the frame of each shelf.

[0043] It is understandable that in some other embodiments, with reference to the Fig. 4 and Fig.5, a second spring 710 is arranged below the head of the screw 700. An upper end of the second spring 710 rests against the head of the screw 700, and a lower end of the second spring 710 rests against the top of the second plastic connector 300. For example, the inner diameter of the mounting hole 610 is larger than the outer diameter of the second spring 710, and the outer diameter of the second spring 710 is larger than the inner diameter of the connecting hole 400, so that the second spring 710 can penetrate the mounting hole 610 and rest against the top of the second plastic connector 300.

[0044] In principle, the shelf connector placed between two shelves allows the fastener 100 to move towards the inside of the frame of each shelf, while the washer 600 moves towards the outside of the frame of each shelf. This allows the fastener 100 and washer 600 to clamp the frame of each shelf by the tensile force of the first spring 500. At this point, the distance between the fastener 100 and washer 600 is changed by turning the screw 700, causing the fastener 100 and washer 600 to move closer together. Therefore, the fastener 100 and washer 600 can compress and connect the inside and outside of the frame of each shelf to achieve a secure connection between the two shelves.

[0045] The screw 700 is pressed to move towards the washer 600, pushing either the first groove position 210 or the second groove position 220 away from the fitting block 310 and finally separating it from the fitting block 310, so that the fitting block 310 can be switched between the first groove position 210 and the second groove position 220. Therefore, the base of the metal washer 600 and the base of each of the two plastic snap fasteners 330 can be quickly switched to clamp with the top of the fastener 100.

[0046] After the screw 700 was turned in the opposite direction, the fastener 100 and the washer 600 moved in opposite directions, thereby releasing the fixed connection between the two shelves.

[0047] In the description of the specification, the descriptions of the reference terms "an embodiment," "some embodiments," "a schematic embodiment," "an example," "a specific example," or "some examples" are intended to be contained in at least one embodiment or example of the present disclosure in combination with the specific features, structures, materials, or properties of that embodiment or example. In this specification, the schematic expression of the above terms does not require the same embodiment or example. Furthermore, the described specific properties, structures, materials, or features may be combined appropriately in one or more embodiments or examples.

[0048] Although the embodiments of the present disclosure have been presented and described, those skilled in the art can understand that various changes, modifications, replacements and deformations can be made to these embodiments without deviating from the essence of the purpose of the present disclosure, and the scope of the present disclosure is defined by the attached claims and their equivalents.

Claims

[1] A shelf connector comprising: a first clamping device comprising a fastening element (100) and a first plastic connector (200) connected to each other, wherein the fastening element (100) has a fastening hole (110) and the first plastic connector (200) has a fitting groove; a second clamping device comprising a washer (600) and a second plastic connector (300) connected to each other, wherein the washer (600) has a mounting hole (610), the second plastic connector (300) has a connecting hole (400) and a fitting block (310), and the fitting groove is positively and slidably connected to the fitting block (310); and a screw (700) that penetrates the mounting hole (610), the connecting hole (400) and the fastening hole (110) and is connected to the fastening hole (110) by means of a thread. [2] The shelf connection device according to claim 1, further comprising a first spring (500), wherein one end of the first spring (500) is connected to the second plastic connector (300) and the other end of the first spring (500) is connected to the fastening element (100). [3] The shelf connector according to claim 2, wherein the first spring (500) is a tension spring with two hooks, a top side of the second plastic connector (300) has a first fastening groove (320), a bottom side of the fastener (100) has a second fastening groove (120) and one end of the first spring (500) is hooked into the first fastening groove (320) and the other end of the first spring (500) is hooked into the second fastening groove (120). [4] The shelf connector according to claim 3, wherein the first plastic connector (200) is connected to the second plastic connector (300) in a pluggable manner, the first plastic connector (200) has a spring channel (240), an upper side of the connecting hole (400) is in contact with the first fastening groove (320), the first spring (500) penetrates into the connecting hole (400), an upper end of the first spring (500) is connected from the upper side of the connecting hole (400) to the first fastening groove (320), and a lower end of the first spring (500) extends from a lower end of the connecting hole (400) through the spring channel (240) to an outside of the fastening element (100) and is connected to the second fastening groove (120). [5] The shelf connector according to claim 2, wherein both sides of the second plastic connector (300) each have an opposing snap lock (330), both sides of the washer (600) each have an opposing clamping groove (620) and the snap lock (330) is detachably connected to the clamping groove (620) in a form-fitting manner. [6] The shelf connection device according to claim 5, wherein a connection direction of two snap locks (330) is parallel or perpendicular to a longitudinal direction of the fastening element (100). [7] The shelf connection device according to claim 6, wherein the fitting groove comprises a first groove position (210) and a second groove position (220) which are spaced apart by 90 degrees along a circumferential direction of the first plastic connector (200), and the fitting block (310) is positively and slidably connected to the first groove position (210) and the second groove position (220), such that the connection direction of the two snap closures (330) of the second plastic connector (300) is parallel or perpendicular to the longitudinal direction of the fastening element (100). [8] The shelf connection device according to claim 7, wherein the first plastic connector (200) has an inclined ramp (230) between the first groove position (210) and the second groove position (220) and the fitting block (310) is movable through the inclined ramp (230) between the first groove position (210) and the second groove position (220). [9] The shelf connection device according to claim 1, wherein both sides of the fastening element (100) each have an opposing connecting groove (130), both sides of the first plastic connector (200) each have an opposing connecting block (250) and the connecting block (250) is positively connected to the connecting groove (130). [10] The shelf connecting device according to claim 1, wherein a top surface of the fastening element (100) has a plurality of teeth (140).

Images