A rack connection device

Abstract

This utility model discloses a shelf connection device, including a first clamping assembly, a second clamping assembly, and bolts. The first clamping assembly includes a fastener and a first plastic connector connected to each other. The fastener has a fixing hole, and the first plastic connector has a positioning groove. The second clamping assembly includes a washer and a second plastic connector connected to each other. The washer has an mounting hole, and the second plastic connector has a connecting hole and a positioning block. The positioning groove and the positioning block are slidably connected. The bolt passes through the mounting hole, the connecting hole, and the fixing hole, and is threadedly connected to the fixing hole. This utility model uses the first and second plastic connectors to restrict the relative rotation of the fasteners, saves metal materials, and is easy to process.

Description

Technical Field

[0001] This utility model relates to the field of shelf connection technology, and in particular to a shelf connection device. Background Technology

[0002] Shelving is essential in warehousing, retail, and logistics facilities for storing, protecting, or displaying goods and shipments. A single shelving unit is often insufficient due to space limitations, so multiple units are typically used together. Without connecting devices, a single shelving unit cannot form a unified load-bearing structure, making it prone to tilting or even collapse due to localized overloading or collisions. Furthermore, adjacent shelving units are susceptible to relative rotation due to collisions. Therefore, shelving units often require connectors. Some shelving units are constructed by splicing multiple horizontal and vertical bars with connectors, appearing as multiple units but essentially functioning as a single unit. This requires pre-drilling holes and preparing the required number of horizontal and vertical bars, making the process cumbersome and prone to errors. Other units directly connect individual finished shelving units to each other using connectors. However, the fasteners in existing connectors are prone to rotation with the bolts, leading to inefficient locking operations. Moreover, all components of existing connectors are machined from metal, making manufacturing complex and costly. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a shelf connecting device that uses a first plastic connector and a second plastic connector to restrict the relative rotation of fasteners, while saving metal materials, reducing costs, and facilitating processing.

[0004] A shelf connection device according to an embodiment of the present utility model includes:

[0005] The first clamping assembly includes a fastener and a first plastic connector that are connected to each other. The fastener is provided with a fixing hole, and the first plastic connector is provided with a positioning groove.

[0006] The second clamping assembly includes a gasket and a second plastic connector that are connected to each other. The gasket is provided with a mounting hole, the second plastic connector is provided with a connection hole, and the second plastic connector is provided with a positioning block. The positioning groove and the positioning block are slidably connected.

[0007] Bolts are inserted into mounting holes, connecting holes, and fixing holes, and are threaded into fixing holes.

[0008] A shelf connection device according to an embodiment of the present utility model has at least the following beneficial effects:

[0009] The first and second plastic connectors can be manufactured using methods such as integral injection molding, which simplifies processing, ensures consistent shape and structure, and significantly reduces costs due to the use of plastic materials. Because the positioning groove of the first plastic connector and the positioning block of the second plastic connector are matched and slidably connected, the first clamping component slides relative to the second clamping component along the positioning groove direction, thus allowing the fastener to slide relative to the washer along the positioning groove direction, restricting rotation of the fastener relative to the washer. When the bolt is rotated, the distance between the fastener and the bolt head changes, preventing the fastener from rotating with the bolt. When the bolt is rotated to shorten the distance between the fastener and the washer, the shelf component positioned between the fastener and the washer is clamped and connected, achieving a fixed connection between the two shelves. The fasteners, washer, and bolts, which bear the critical forces in the clamping connection, are made of metal, ensuring that the connection strength of the shelf connection device is not reduced. However, the first and second plastic connectors, which provide positioning guidance for the fastener's movement and restrict rotation of the fastener relative to the washer, are made of plastic, which does not affect the connection strength of the shelf connection device and saves metal materials, making them easy to process.

[0010] A shelf connection device according to an embodiment of the present utility model further includes a first spring, one end of which is connected to a second plastic connector, and the other end of which is connected to a fastener.

[0011] According to an embodiment of the present utility model, a shelf connecting device is provided with a first spring as a double-hook tension spring, a first fixing groove is provided on the top of a second plastic connector, a second fixing groove is provided on the bottom of a fastener, and the two ends of the first spring are respectively hooked to the first fixing groove and the second fixing groove.

[0012] According to an embodiment of the present utility model, a shelf connecting device is provided, wherein a first plastic connector and a second plastic connector are sleeved and connected, the first plastic connector is provided with a spring through groove, the top of the connecting hole is connected to a first fixing groove, a first spring is inserted into the connecting hole, the top end of the first spring is connected from the top of the connecting hole to the first fixing groove, and the bottom end of the first spring is inserted from the bottom end of the connecting hole through the spring through groove to the outside of the fastener and connected to the second fixing groove.

[0013] According to an embodiment of the present utility model, a shelf connection device is provided with buckles on opposite sides of a second plastic connector and slots on opposite sides of a gasket, wherein the buckles and slots are detachably matched and connected.

[0014] According to an embodiment of the present invention, in a shelf connection device, the line connecting the two buckles is parallel or perpendicular to the length direction of the fastener.

[0015] According to an embodiment of the present utility model, a shelf connection device includes a positioning groove including a first groove and a second groove. The first groove and the second groove are arranged at a 90-degree interval along the circumference of the first plastic connector. The positioning block can be matched and slidably connected with the first groove or the second groove, so that the direction of the two buckle connection line of the second plastic connector is parallel or perpendicular to the length direction of the fastener.

[0016] According to an embodiment of the present utility model, a shelf connection device is provided with an inclined slide between a first plastic connector and a second slot, and a positioning block can move from the first slot to the second slot or from the second slot to the first slot via the inclined slide.

[0017] According to an embodiment of the present utility model, a shelf connecting device is provided with connecting grooves on opposite sides of a fastener; connecting blocks are provided on opposite sides of a first plastic connector, and the connecting blocks and connecting grooves can be matched and connected.

[0018] According to an embodiment of the present utility model, a shelf connection device has teeth on the top surface of the fastener.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a perspective view of a shelf connection device according to an embodiment of the present utility model;

[0022] Figure 2 This is a perspective view of a first plastic connector, a second plastic connector, a first spring, and a fastener of a shelf connecting device according to an embodiment of the present utility model.

[0023] Figure 3 This is another perspective view of the first plastic connector, the second plastic connector, the first spring, and the fastener of a shelf connecting device according to an embodiment of the present utility model.

[0024] Figure 4 This is an exploded view of the structure of a shelf connection device according to an embodiment of the present utility model;

[0025] Figure 5 This is an exploded view of another angle of a shelf connection device according to an embodiment of the present utility model;

[0026] Figure 6 This is a perspective view of a fastener of a shelf connection device according to an embodiment of the present invention after it has been rotated 90 degrees.

[0027] Explanation of reference numerals in the attached figures:

[0028] Fastener 100; Fixing hole 110; Second fixing groove 120; Connecting groove 130; Tooth 140;

[0029] First plastic connector 200; first groove 210; second groove 220; inclined slide 230; spring through groove 240; connecting block 250;

[0030] Second plastic connector 300; positioning block 310; first fixing groove 320; buckle 330; limiting protrusion 340;

[0031] 400mm connection hole;

[0032] First spring 500;

[0033] Gasket 600; Mounting hole 610; Slot 620;

[0034] Bolt 700; Second spring 710; Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1 to 6 This utility model provides a shelf connection device, including a first clamping assembly, a second clamping assembly, and a bolt 700. The first clamping assembly includes a fastener 100 and a first plastic connector 200 connected to each other. The fastener 100 is provided with a fixing hole 110, and the first plastic connector 200 is provided with a positioning groove. Specifically, the fixing hole 110 is provided with a thread. The second clamping assembly includes a washer 600 and a second plastic connector 300 connected to each other. The washer 600 is provided with a mounting hole 610, and the second plastic connector 300 is provided with a connecting hole 400. The second plastic connector 300 is provided with a positioning block 310. The positioning groove and the positioning block 310 are matched and slidably connected to realize the connection between the first plastic connector 200 and the bolt 700. The fastener 100 slides relative to the second plastic connector 300 along the direction of the positioning groove. Specifically, the first plastic connector 200 and the second plastic connector 300 are disposed between the fastener 100 and the washer 600. The first plastic connector 200 is connected to the fastener 100, and the second plastic connector 300 is connected to the washer 600, thereby enabling the fastener 100 to slide relative to the washer 600 along the direction of the positioning groove, and positioning restricting the fastener 100 from rotating relative to the washer 600. Specifically, the fixing hole 110, the connecting hole 400 and the mounting hole 610 are arranged coaxially in sequence. The bolt 700 passes through the mounting hole 610, the connecting hole 400 and the fixing hole 110, and the bolt 700 is threadedly connected to the fixing hole 110.

[0040] It should be noted that, in this application, "above" refers to the direction near the head of bolt 700, and "below" refers to the direction near fastener 100.

[0041] Specifically, the fastener 100 is connected to the threaded end of the bolt 700 through the threaded fixing hole 110, and the head of the bolt 700 is positioned above the washer 600. The first plastic connector (200), the second plastic connector (300), and the washer 600 are constrained between the head of the fastener 100 and the bolt 700. The fastener 100 has a long side and a short side. The two ends of the fastener 100 along the length direction (i.e., the long side direction) are used to press the inner side of the frame of the two shelves. The fastener 100 is placed on the inner side of the frame of the two shelves, and the washer 600 is placed on the outer side of the frame of the two shelves. The bolt 700 is used to move the fastener 100 toward the washer 600 so that the fastener 100 and the washer 600 can press the inner side and the outer side of the frame of the two shelves respectively, so as to achieve a fixed connection between the two shelves.

[0042] Specifically, the first plastic connector 200 and the second plastic connector 300 can be made of plastic materials such as polyoxymethylene, polyvinyl chloride, and polypropylene.

[0043] Preferably, the fastener 100, washer 600 and bolt 700 are made of metal.

[0044] The first plastic connector 200 and the second plastic connector 300 are made of plastic and can be manufactured using methods such as one-piece injection molding, which simplifies the manufacturing process, ensures consistent appearance, and significantly reduces costs. Because the positioning groove of the first plastic connector 200 and the positioning block 310 of the second plastic connector 300 are slidably connected, the first clamping component slides relative to the second clamping component along the positioning groove direction, which in turn allows the fastener 100 to slide relative to the washer 600 along the positioning groove direction. Positioning restricts the rotation of the fastener 100 relative to the washer 600. Rotating the bolt 700 changes the distance between the fastener 100 and the bolt 700 head, preventing the fastener 100 from rotating with the bolt 700. When the bolt 700 is rotated to shorten the distance between the fastener 100 and the washer 600, the shelf component located between the fastener 100 and the washer 600 is clamped and connected, achieving a fixed connection between the two shelves. The fasteners 100, washers 600 and bolts 700, which bear the key forces in the clamping connection, are made of metal, which ensures that the connection strength of the rack connection device is not reduced. The first plastic connector 200 and the second plastic connector 300, which provide positioning and guide the movement direction of the fastener 100 and limit the rotation of the fastener 100 relative to the washers 600, are made of plastic, which does not affect the connection strength of the rack connection device, and also saves metal materials and is easy to process.

[0045] According to some embodiments of this application, refer to Figures 1 to 5 It also includes a first spring 500, one end of which is connected to the second plastic connector 300, and the other end of which is connected to the fastener 100. The tension of the first spring 500 can pull the fastener 100 and the second plastic connector 300 together, thereby pulling the fastener 100 and the gasket 600 together. When the fastener 100 is placed inside the shelf frame and the gasket 600 is placed outside the shelf frame, the tension of the first spring 500 can pre-clamp the fastener 100 and the gasket 600 against the shelf frame.

[0046] Furthermore, referring to Figures 4 to 5 The first spring 500 is a double-hook tension spring. The top of the second plastic connector 300 is provided with a first fixing groove 320, and the bottom of the fastener 100 is provided with a second fixing groove 120. The two ends of the first spring 500 are hooked to the first fixing groove 320 and the second fixing groove 120 respectively, so as to improve the reliability of the first spring 500 in providing tension to the fastener 100 and the second plastic connector 300.

[0047] Furthermore, the first plastic connector 200 and the second plastic connector 300 are sleeved together. The first plastic connector 200 is provided with a spring through groove 240. The top of the connecting hole 400 communicates with the first fixing groove 320. The first spring 500 passes through the connecting hole 400. The top end of the first spring 500 connects to the first fixing groove 320 from the top of the connecting hole 400. The bottom end of the first spring 500 passes through the spring through groove 240 from the bottom end of the connecting hole 400 to the outside of the fastener 100 and connects to the second fixing groove 120. Specifically, the spring through groove 240 is located below the bottom end of the connecting hole 400 so that the bottom end of the first spring 500 can extend from the bottom end of the connecting hole 400 to the spring through groove 240 and pass through to the outside of the fastener 100. Specifically, after the bottom end of the first spring 500 passes through the spring through groove 240 to the outside of the first plastic connector 200, it goes around one side of the fastener 100 and finally connects to the second fixing groove 120. The first spring 500 is inserted into the connecting hole 400, which further improves the reliability and stability of the first spring 500 when providing tension.

[0048] It is understood that in some other embodiments, a limiting protrusion 340 is provided below the middle of the second plastic connector 300 to limit the shortest distance between the first plastic connector 200 and the second plastic connector 300, ensuring that the fastener 100 and the gasket 600 are at a certain distance, so as to facilitate the placement of the fastener 100 on the inside of the shelf frame and further reduce the amount of material used.

[0049] According to some embodiments of this application, refer to Figures 2 to 5 The second plastic connector 300 is provided with buckles 330 on both sides, and the gasket 600 is provided with slots 620 on both sides. The buckles 330 and the slots 620 can be detachably matched and connected, which improves the installation convenience between the second plastic connector 300 and the gasket 600.

[0050] Furthermore, referring to Figure 1 The line connecting the two clips 330 is perpendicular to the length direction of the fastener 100. The bottom surface of the metal washer 600 and the top surface of the fastener 100 work together to clamp the shelf frame, increasing the clamping friction.

[0051] In some other embodiments, the line connecting the two clips 330 is parallel to the length direction of the fastener 100. The bottom surface of the plastic clips 330 and the top surface of the fastener 100 work together to clamp the shelf frame, reducing scratches on the shelf frame.

[0052] Furthermore, referring to Figure 4 and Figure 5The positioning groove includes a first groove 210 and a second groove 220, which are spaced 90 degrees apart circumferentially along the first plastic connector 200. The positioning block 310 can slide and connect with either the first groove 210 or the second groove 220, so that the line connecting the two latches 330 of the second plastic connector 300 is parallel or perpendicular to the length direction of the fastener 100. Specifically, refer to... Figure 1 When the positioning block 310 is matched and connected with the first slot 210, the line connecting the two buckles 330 of the second plastic connector 300 is perpendicular to the length direction of the fastener 100. At this time, the bottom surface of the metal washer 600 and the top surface of the fastener 100 work together to clamp the shelf frame; refer to Figure 6 When the positioning block 310 is matched and connected with the second slot 220, the line direction of the connection between the two buckles 330 of the second plastic connector 300 is parallel to the length direction of the fastener 100. At this time, the bottom surface of the plastic buckle 330 and the top surface of the fastener 100 work together to clamp the shelf frame.

[0053] Furthermore, referring to Figure 4 and Figure 5 The first plastic connector 200 is provided with an inclined slide 230 between the first slot 210 and the second slot 220. The positioning block 310 can move from the first slot 210 to the second slot 220, or from the second slot 220 to the first slot 210, via the inclined slide 230. Specifically, refer to... Figure 4 and Figure 5 The inclined slide 230 tilts from the second slot 220 to the first slot 210. When the positioning block 310 is in the second slot 220, the pressing bolt 700 moves towards the washer 600, pushing the second slot 220 away from the positioning block 310 and eventually disengaging it. At this point, simply rotate the bolt 700 gently along the direction from the second slot 220 to the first slot 210, and the inclined slide 230 will slide the first slot 210 to the position of the positioning block 310 and lock it in place, thus quickly switching the bottom surface of the metal washer 600 with the top surface of the fastener 100. The positioning block 310 is clamped; when the positioning block 310 is in the first slot 210, the pressing bolt 700 moves towards the washer 600, pushing the first slot 210 away from the positioning block 310 and finally disengaging from the positioning block 310. At this time, simply rotate the bolt 700 forcefully along the first slot 210 towards the second slot 220, and slide the second slot 220 to the position of the positioning block 310 and lock the positioning block 310, so as to quickly switch the bottom surface of the plastic buckle 330 to clamp the top surface of the fastener 100.

[0054] Understandably, since 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, under the tension of the first spring 500, the positioning block 310 of the second plastic connector 300 can be kept confined in the first groove 210 or the second groove 220 of the first plastic connector 200, so as to restrict the first plastic connector 200 from rotating relative to the second plastic connector 300, thereby restricting the fastener 100 from rotating relative to the washer 600.

[0055] As a preferred option, refer to Figure 1 The bottom side of the buckle 330 is closer to the fastener 100 than the bottom side of the pad 600, meaning the bottom side of the buckle 330 is below the bottom side of the pad 600. When the positioning block 310 is matched and connected with the first slot 210, the relative distance between the bottom surface of the metal pad 600 and the top surface of the fastener 100 is relatively large. When the positioning block 310 is matched and connected with the second slot 220, the relative distance between the bottom surface of the plastic buckle 330 and the top surface of the fastener 100 is relatively small. This facilitates switching between the maximum and minimum clamping distances of the shelf connection device to accommodate more shelf frames of different thicknesses.

[0056] According to some embodiments of this application, refer to Figure 4 and Figure 5 The fastener 100 has connecting grooves 130 on both sides; the first plastic connector 200 has connecting blocks 250 on both sides, and the connecting blocks 250 can be matched with the connecting grooves 130. The connecting blocks 250 and the connecting grooves 130 facilitate the connection between the first plastic connector 200 and the fastener 100.

[0057] According to some embodiments of this application, refer to Figure 2 and Figure 4 The top surface of the fastener 100 is provided with teeth 140. This can increase the clamping friction of the fastener 100 against the shelf frame and improve the connection effect.

[0058] As a preferred option, the teeth 140 are staggered, with acute angles formed between different teeth 140, further enhancing the clamping friction of the fastener 100 on the shelf frame.

[0059] It is understood that, in some other embodiments, reference is made to... Figure 4 and Figure 5A second spring 710 is fitted below the head of the bolt 700. The top end of the second spring 710 abuts against the head of the bolt 700, and the bottom end of the second spring 710 abuts against the top of the second plastic connector 300. Specifically, 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 pass through the mounting hole 610 and abut against the top of the second plastic connector 300.

[0060] Working principle: The rack connecting device is placed between two racks, causing the fastener 100 to move to the inside of the frame of the two racks and the gasket 600 to move to the outside of the frame of the two racks. The tension of the first spring 500 allows the fastener 100 and the gasket 600 to pre-clamp the rack frame. At this time, by rotating the bolt 700, the distance between the fastener 100 and the gasket 600 is changed, so that the fastener 100 and the gasket 600 move towards each other, allowing the fastener 100 and the gasket 600 to press and connect the inside and outside of the frame of the two racks respectively, so as to achieve a fixed connection between the two racks.

[0061] By pressing the bolt 700 to move towards the washer 600, the first slot 210 or the second slot 220 is pushed away from the positioning block 310 and eventually disengaged from the positioning block 310. This allows the positioning block 310 to switch between the first slot 210 and the second slot 220, so that the bottom surface of the metal washer 600 can be clamped with the top surface of the fastener 100, or the bottom surface of the plastic buckle 330 can be clamped with the top surface of the fastener 100.

[0062] After turning the bolt 700 in the opposite direction, the fastener 100 and the washer 600 will move in opposite directions, thus releasing the fixed connection between the two shelves.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shelf connection device, characterized in that, include: The first clamping assembly includes a fastener (100) and a first plastic connector (200) connected to each other. The fastener (100) is provided with a fixing hole (110), and the first plastic connector (200) is provided with a positioning groove. The second clamping assembly includes a gasket (600) and a second plastic connector (300) connected to each other. The gasket (600) is provided with a mounting hole (610), and the second plastic connector (300) is provided with a connection hole (400). The second plastic connector (300) is provided with a positioning block (310), and the positioning groove is slidably connected to the positioning block (310). A bolt (700) is inserted into the mounting hole (610), the connecting hole (400), and the fixing hole (110), and the bolt (700) is threadedly connected to the fixing hole (110).

2. The shelf connection device according to claim 1, characterized in that, It also includes a first spring (500), one end of which is connected to the second plastic connector (300), and the other end of which is connected to the fastener (100).

3. The shelf connection device according to claim 2, characterized in that, The first spring (500) is a double-hook tension spring. The top of the second plastic connector (300) is provided with a first fixing groove (320), and the bottom of the fastener (100) is provided with a second fixing groove (120). The two ends of the first spring (500) are respectively hooked to the first fixing groove (320) and the second fixing groove (120).

4. A shelf connection device according to claim 3, characterized in that, The first plastic connector (200) and the second plastic connector (300) are sleeved together. The first plastic connector (200) is provided with a spring through groove (240). The top of the connecting hole (400) is connected to the first fixing groove (320). The first spring (500) is inserted into the connecting hole (400). The top of the first spring (500) is connected from the top of the connecting hole (400) to the first fixing groove (320). The bottom of the first spring (500) is inserted from the bottom of the connecting hole (400) through the spring through groove (240) to the outside of the fastener (100) and connected to the second fixing groove (120).

5. A shelf connection device according to claim 2, characterized in that, The second plastic connector (300) has buckles (330) on its opposite sides, and the gasket (600) has slots (620) on its opposite sides. The buckles (330) and the slots (620) are detachably matched and connected.

6. A shelf connection device according to claim 5, characterized in that, The line connecting the two buckles (330) is parallel or perpendicular to the length direction of the fastener (100).

7. A shelf connection device according to claim 6, characterized in that, The positioning groove includes a first groove (210) and a second groove (220). The first groove (210) and the second groove (220) are set at a 90-degree interval along the circumference of the first plastic connector (200). The positioning block (310) can be matched and slidably connected with the first groove (210) or the second groove (220) so that the connecting direction of the two buckles (330) of the second plastic connector (300) is parallel or perpendicular to the length direction of the fastener (100).

8. A shelf connection device according to claim 7, characterized in that, The first plastic connector (200) is provided with an inclined slide (230) between the first slot (210) and the second slot (220). The positioning block (310) can move from the first slot (210) to the second slot (220) or from the second slot (220) to the first slot (210) via the inclined slide (230).

9. A shelf connection device according to claim 1, characterized in that, The fastener (100) has connecting grooves (130) on its opposite sides; the first plastic connector (200) has connecting blocks (250) on its opposite sides, and the connecting blocks (250) can be matched and connected with the connecting grooves (130).

10. A shelf connection device according to claim 1, characterized in that, The top surface of the fastener (100) is provided with teeth (140).

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