Goods shelf connecting device

Abstract

The invention discloses a goods shelf connecting device which comprises a first clamping assembly, a second clamping assembly and a bolt, the first clamping assembly comprises a fastener and a first plastic connecting piece which are connected with each other, the fastener is provided with a fixing hole, and the first plastic connecting piece is provided with a positioning groove; the second clamping assembly comprises a gasket and a second plastic connecting piece which are connected with each other, the gasket is provided with a mounting hole, the second plastic connecting piece is provided with a connecting hole and a positioning block, and the positioning groove is slidably connected with the positioning block in a matched mode; the bolts penetrate through the mounting holes, the connecting holes and the fixing holes and are in threaded connection with the fixing holes. Relative rotation of the fastener is limited through the first plastic connecting piece and the second plastic connecting piece, metal materials are saved, and machining is easy.

Description

Technical Field

[0001] The present invention relates to the technical field of shelf connection, and in particular to a shelf connection device. Background Art

[0002] Shelves are needed in warehouses, stores, logistics, and express delivery facilities to store, preserve, or display goods and shipments for sale. Single shelves often lack sufficient space, so most shelves are not used alone. In most scenarios, multiple shelves are used in combination. If a single, independent shelf lacks a connecting device, it cannot form a single, load-bearing structure and can easily tilt or even collapse due to local overload or collisions. Furthermore, adjacent shelves can easily rotate relative to each other due to collisions. Therefore, shelves often need to be connected via connectors. Currently, some shelves are constructed by splicing together multiple horizontal and vertical bars, which appear to be multiple shelves but are actually a single shelf. These components require pre-drilling holes and pre-preparing the corresponding number of horizontal and vertical bars according to design requirements, making the process cumbersome and prone to errors. Others directly use connectors to connect individual finished shelves to one another. However, the fasteners in existing connectors are prone to rotating with the bolts, resulting in inefficient locking and connection operations. Furthermore, all components of existing connectors are formed through metal processing, which is complex and costly. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a shelf connecting device that utilizes a first plastic connecting member and a second plastic connecting member to limit the relative rotation of a fastener, saves metal materials, saves costs, and is easy to process.

[0004] A shelf connection device according to an embodiment of the present invention includes: A first clamping assembly includes a fastener and a first plastic connector connected to each other, the fastener is provided with a fixing hole, and the first plastic connector is provided with a positioning groove; The second clamping assembly includes a gasket and a second plastic connector connected to each other, the gasket is provided with a mounting hole, the second plastic connector is provided with a connection hole, the second plastic connector is provided with a positioning block, and the positioning groove is matched with the positioning block for sliding connection; Bolts are passed through the mounting holes, the connecting holes and the fixing holes, and the bolts are threadedly connected to the fixing holes.

[0005] A shelf connection device according to an embodiment of the present invention has at least the following beneficial effects: The first and second plastic connectors can be manufactured using methods such as integral injection molding, which is simple to manufacture and provides a consistent appearance and structure. Furthermore, the use of plastic material significantly reduces costs. Because the positioning groove of the first plastic connector matches and slides with the positioning block of the second plastic connector, the first clamping assembly slides relative to the second clamping assembly along the positioning groove, thereby enabling the fastener to slide relative to the gasket along the positioning groove, limiting rotation of the fastener relative to the gasket. 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 gasket, the shelf member disposed between the fastener and the gasket is clamped together, thereby achieving a secure connection between the two shelves. The fastener, gasket, and bolt, which bear the critical forces during the clamping connection, are made of metal, ensuring that the connection strength of the shelf connection device is not compromised. The first and second plastic connectors, which provide the functions of positioning and guiding the fastener's movement and limiting rotation of the fastener relative to the gasket, are made of plastic, which does not compromise the connection strength of the shelf connection device, saves metal material, and is convenient and easy to manufacture.

[0006] A shelf connection device according to an embodiment of the present invention further includes 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.

[0007] According to a shelf connection device of an embodiment of the present invention, the first spring is a double-hook tension spring, the top of the second plastic connector is provided with a first fixing groove, the bottom of the fastener is provided with a second fixing groove, and the two ends of the first spring are respectively hooked to the first fixing groove and the second fixing groove.

[0008] According to a shelf connection device of an embodiment of the present invention, a first plastic connector is sleeved and connected to a second plastic connector, the first plastic connector is provided with a spring slot, the top of the connecting hole is connected to the first fixed slot, the first spring is passed through the connecting hole, the top of the first spring is connected to the first fixed slot from the top of the connecting hole, and the bottom end of the first spring passes through the spring slot from the bottom end of the connecting hole to the outside of the fastener and is connected to the second fixed slot.

[0009] According to a shelf connection device of an embodiment of the present invention, buckles are respectively provided on opposite sides of the second plastic connector, and slots are respectively provided on opposite sides of the gasket, and the buckles and the slots are detachably matched and connected.

[0010] According to a shelf connection device of an embodiment of the present invention, the connection direction of the two buckles is parallel or perpendicular to the length direction of the fastener.

[0011] According to a shelf connection device of an embodiment of the present invention, the positioning groove includes a first slot and a second slot, and the first slot and the second slot are arranged at 90 degrees along the circumference of the first plastic connector. The positioning block can be matched with the first slot or the second slot for sliding connection so that the direction of the two buckle connection lines of the second plastic connector is parallel or perpendicular to the length direction of the fastener.

[0012] According to a shelf connection device of an embodiment of the present invention, the first plastic connector is provided with an inclined slide between the first slot and the second slot, and the positioning block can move from the first slot to the second slot or from the second slot to the first slot through the inclined slide.

[0013] According to a shelf connection device of an embodiment of the present invention, connection grooves are provided on opposite sides of the fastener; connection blocks are provided on opposite sides of the first plastic connection member, and the connection blocks can be matched and connected with the connection grooves.

[0014] According to a shelf connection device of an embodiment of the present invention, teeth are provided on the top surface of the fastener.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 A perspective view of a shelf connection device according to an embodiment of the present invention; Figure 2 A three-dimensional diagram 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 invention; Figure 3 A three-dimensional view from another angle 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 invention; Figure 4 This is an exploded view of the structure of a shelf connection device according to an embodiment of the present invention; Figure 5 This is an exploded structural diagram from another angle of a shelf connection device according to an embodiment of the present invention; Figure 6 This is a three-dimensional view of a fastener of a shelf connection device according to an embodiment of the present invention after being rotated 90 degrees.

[0017] Description of reference numerals: Fastener 100; fixing hole 110; second fixing groove 120; connecting groove 130; teeth 140; First plastic connector 200; first slot 210; second slot 220; inclined slide 230; spring slot 240; connecting block 250; Second plastic connector 300; positioning block 310; first fixing groove 320; buckle 330; limiting protrusion 340; Connecting hole 400; a first spring 500; Gasket 600; mounting hole 610; slot 620; Bolt 700; second spring 710; DETAILED DESCRIPTION The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0019] In the description of an invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] Reference Figures 1 to 6The embodiment of the present invention 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, a thread is provided in the fixing hole 110; 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, the second plastic connector 300 is provided with a connecting hole 400, and 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 achieve the first plastic connector 20 0 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 arranged between the fastener 100 and the gasket 600, the first plastic connector 200 is connected to the fastener 100, and the second plastic connector 300 is connected to the gasket 600, thereby enabling the fastener 100 to slide relative to the gasket 600 along the direction of the positioning groove, and the positioning limits the fastener 100 from rotating relative to the gasket 600; specifically, the fixing hole 110, the connecting hole 400 and the mounting hole 610 are coaxially arranged in sequence; the bolt 700 is passed 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.

[0022] It should be noted that the upper side in the present application refers to the direction close to the head of the bolt 700 , and the lower side in the present application refers to the direction close to the fastener 100 .

[0023] Specifically, the fastener 100 is connected to the threaded end of the bolt 700 through the threaded fixing hole 110 to be connected to the threaded end of the bolt 700, the head of the bolt 700 is arranged above the gasket 600, and the first plastic connector (200), the second plastic connector (300), and the gasket 600 are restricted between the fastener 100 and the head of the bolt 700; the fastener 100 is provided with a long side and a short side, and the two ends of the fastener 100 along the length direction (i.e., the long side direction) are used to press the inner sides of the frames of the two shelves; the fastener 100 is placed on the inner sides of the frames of the two shelves, and the gasket 600 is placed on the outer sides of the frames of the two shelves, and the bolt 700 is used to move the fastener 100 toward the gasket 600, so that the fastener 100 and the gasket 600 can respectively press and connect the inner sides and outer sides of the frames of the two shelves to achieve a fixed connection between the two shelves.

[0024] 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.

[0025] Preferably, the fastener 100 , the gasket 600 and the bolt 700 are made of metal.

[0026] The first plastic connector 200 and the second plastic connector 300 are made of plastic and can be manufactured using methods such as integral injection molding, which is simple to process, has a consistent appearance and structure, and can significantly save costs. Because the positioning groove of the first plastic connector 200 matches and slides with the positioning block 310 of the second plastic connector 300, the first clamping assembly can slide relative to the second clamping assembly along the positioning groove, thereby enabling the fastener 100 to slide relative to the gasket 600 along the positioning groove. This positioning limits the rotation of the fastener 100 relative to the gasket 600. When the bolt 700 is rotated, the distance between the fastener 100 and the head of the bolt 700 changes, 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 gasket 600, the shelf components disposed between the fastener 100 and the gasket 600 can be clamped and connected, thereby achieving a fixed connection between the two shelves. The fastener 100, gasket 600 and bolt 700 that bear the key force in the clamping connection are made of metal material, which can ensure that the connection strength of the shelf connection device is not reduced. The first plastic connector 200 and the second plastic connector 300 that provide the function of positioning and guiding the moving direction of the fastener 100 and limiting the rotation of the fastener 100 relative to the gasket 600 are made of plastic material, which does not affect the connection strength of the shelf connection device, but also saves metal materials and is convenient and easy to process.

[0027] According to some embodiments of the present application, referring to Figures 1 to 5 , further comprising a first spring 500, one end of the first spring 500 being connected to the second plastic connector 300, and the other end of the first spring 500 being connected to the fastener 100. The tension of the first spring 500 can be used to pull the fastener 100 and the second plastic connector 300 toward each other, thereby pulling the fastener 100 and the gasket 600 toward each other. 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 be used to pre-clamp the shelf frame with the fastener 100 and the gasket 600.

[0028] Further, refer to Figures 4 and 5 The first spring 500 is a double-hook tension spring, a first fixing groove 320 is provided at the top of the second plastic connector 300, and a second fixing groove 120 is provided at the bottom of the fastener 100. The two ends of the first spring 500 are respectively hooked to the first fixing groove 320 and the second fixing groove 120 to improve the reliability of the first spring 500 when providing tension to the fastener 100 and the second plastic connector 300.

[0029] Furthermore, the first plastic connector 200 is sleeved and connected to the second plastic connector 300. The first plastic connector 200 is provided with a spring slot 240. The top of the connecting hole 400 is connected to the first fixing slot 320. The first spring 500 is inserted into the connecting hole 400. The top of the first spring 500 is connected to the first fixing slot 320 from the top of the connecting hole 400. The bottom end of the first spring 500 passes from the bottom end of the connecting hole 400 through the spring slot 240 to the outside of the fastener 100 and is connected to the second fixing slot 120. Specifically, the spring slot 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 slot 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 slot 240 to the outside of the first plastic connector 200, it bypasses one side of the fastener 100 and is finally connected to the second fixing slot 120. The first spring 500 is inserted into the connecting hole 400 , which further improves the reliability and stability of the first spring 500 in providing tension.

[0030] It is understandable that in some other embodiments, a limiting protrusion 340 is provided below the middle portion of the second plastic connector 300 to limit the shortest distance between the first plastic connector 200 and the second plastic connector 300, thereby ensuring a certain distance between the fastener 100 and the gasket 600, so as to facilitate the placement of the fastener 100 on the inner side of the shelf frame and further reduce material usage.

[0031] According to some embodiments of the present application, referring to Figures 2 to 5 The second plastic connector 300 is provided with buckles 330 on opposite sides, and the gasket 600 is provided with slots 620 on opposite sides. The buckles 330 and the slots 620 are detachably matched and connected, thereby improving the installation convenience between the second plastic connector 300 and the gasket 600.

[0032] Further, refer to Figure 1 The connection direction of the two buckles 330 is perpendicular to the length direction of the fastener 100. The bottom surface of the metal gasket 600 and the top surface of the fastener 100 are used to clamp the shelf frame, thereby improving the clamping friction.

[0033] In some other embodiments, the connecting line of the two buckles 330 is parallel to the length direction of the fastener 100. The bottom surface of the plastic buckle 330 and the top surface of the fastener 100 are used to clamp the shelf frame, thereby reducing scratches on the shelf frame.

[0034] Further, refer to Figure 4 and Figure 5The positioning groove includes a first groove 210 and a second groove 220. The first groove 210 and the second groove 220 are arranged at 90 degrees along the circumference of the first plastic connector 200. The positioning block 310 can be matched with the first groove 210 or the second groove 220 for sliding connection, so that the connection direction of the two buckles 330 of the second plastic connector 300 is parallel or perpendicular to the length direction of the fastener 100. Specifically, referring to Figure 1 When the positioning block 310 is matched with the first slot 210, the connection direction of 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 gasket 600 and the top surface of the fastener 100 are used to clamp the shelf frame. Figure 6 When the positioning block 310 is matched and connected with the second slot 220, the connection direction of the two clips 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 clip 330 and the top surface of the fastener 100 are used to clamp the shelf frame.

[0035] Further, refer 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, and the positioning block 310 can be moved 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. 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 located in the second slot 220, the pressing bolt 700 moves toward the gasket 600, pushing the second slot 220 away from the positioning block 310 and finally disengaging from the positioning block 310. At this time, it is only necessary to gently rotate the bolt 700 along the direction of the second slot 220 toward the first slot 210. Under the pulling force of the first spring 500 on the first plastic connector 200, the inclined slide 230 can be used to slide the first slot 210 to the position of the positioning block 310 and clamp the positioning block 310, so as to quickly switch to the metal gasket 60. 0 is clamped with the top surface of the fastener 100; when the positioning block 310 is located in the first slot 210, the pressing bolt 700 moves toward the gasket 600, pushing the first slot 210 away from the positioning block 310 and finally disengaging from the positioning block 310. At this time, it is only necessary to forcefully rotate the bolt 700 along the first slot 210 toward the second slot 220, and slide the second slot 220 to the position of the positioning block 310 and clamp the positioning block 310, so as to quickly switch the bottom surface of the plastic buckle 330 and the top surface of the fastener 100 for clamping.

[0036] It can be understood that 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 remain confined in the first slot 210 or the second slot 220 of the first plastic connector 200, so as to limit the rotation of the first plastic connector 200 relative to the second plastic connector 300, and further limit the rotation of the fastener 100 relative to the gasket 600.

[0037] As a preferred solution, refer to Figure 1 The bottom side of the clip 330 is closer to the fastener 100 than the bottom side of the gasket 600, that is, the bottom side of the clip 330 is located below the bottom side of the gasket 600. When the positioning block 310 is matched with the first slot 210, the relative distance between the bottom surface of the metal gasket 600 and the top surface of the fastener 100 is larger; when the positioning block 310 is matched with the second slot 220, the relative distance between the bottom surface of the plastic clip 330 and the top surface of the fastener 100 is smaller; it is convenient to switch the maximum clamping distance and the minimum clamping distance of the shelf connection device to adapt to more shelf frames with different thicknesses.

[0038] According to some embodiments of the present application, referring to Figure 4 and Figure 5 The fastener 100 is provided with connecting grooves 130 on opposite sides; the first plastic connector 200 is provided with connecting blocks 250 on opposite sides. 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.

[0039] According to some embodiments of the present application, referring to Figure 2 and Figure 4 The top surface of the fastener 100 is provided with teeth 140. This can increase the pressing friction of the fastener 100 on the shelf frame and improve the connection effect.

[0040] As a preferred solution, the teeth 140 are staggered teeth, and sharp angles are formed between different teeth 140, further improving the pressing friction of the fastener 100 on the shelf frame.

[0041] It is understood that in some other embodiments, reference Figure 4 and Figure 5A second spring 710 is sleeved below the head of the bolt 700. The top end of the second spring 710 abuts the head of the bolt 700, and the bottom end of the second spring 710 abuts 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 be inserted into the mounting hole 610 and abut the top of the second plastic connector 300.

[0042] Working principle: Place the shelf connecting device between two shelves, move the fastener 100 to the inner side of the frames of the two shelves, move the gasket 600 to the outer side of the frames of the two shelves, and use the tension of the first spring 500 to pre-tighten the shelf frames with the fastener 100 and the gasket 600; 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 toward each other, so that the fastener 100 and the gasket 600 can respectively press the inner side and the outer side of the frames of the two shelves to achieve a fixed connection between the two shelves.

[0043] By pressing the bolt 700 to move toward the gasket 600, the first slot 210 or the second slot 220 is pushed away from the positioning block 310 and finally disengaged from the positioning block 310, so that the positioning block 310 can be switched between the first slot 210 or the second slot 220, so as to quickly switch to clamping the bottom surface of the gasket 600 made of metal and the top surface of the fastener 100, or quickly switch to clamping the bottom surface of the clip 330 made of plastic and the top surface of the fastener 100.

[0044] After the bolt 700 is rotated in the opposite direction, the fastener 100 and the gasket 600 move in the opposite direction, thereby releasing the fixed connection between the two shelves.

[0045] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses 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 any one or more embodiments or examples.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A shelf connection device, characterized in that: include: A first clamping assembly comprises a fastener (100) and a first plastic connector (200) connected to each other, wherein 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 comprises a gasket (600) and a second plastic connector (300) connected to each other, the gasket (600) being provided with a mounting hole (610), the second plastic connector (300) being provided with a connecting hole (400), the second plastic connector (300) being provided with a positioning block (310), the positioning groove being matched with the positioning block (310) for sliding connection; The bolt (700) is passed 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).

2. A shelf connection device according to claim 1, characterized in that: It also includes 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).

3. A 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), the bottom of the fastener (100) is provided with a second fixing groove (120), and the two ends of the first spring (500) are hooked to the first fixing groove (320) and the second fixing groove (120), respectively.

4. A shelf connection device according to claim 3, characterized in that: The first plastic connector (200) is sleeve-connected to the second plastic connector (300), the first plastic connector (200) is provided with a spring slot (240), the top of the connecting hole (400) is connected to the first fixing slot (320), the first spring (500) is passed through the connecting hole (400), the top of the first spring (500) is connected to the first fixing slot (320) from the top of the connecting hole (400), and the bottom of the first spring (500) passes from the bottom of the connecting hole (400) through the spring slot (240) to the outside of the fastener (100) and is connected to the second fixing slot (120).

5. The shelf connection device according to claim 2, characterized in that: Buckles (330) are respectively provided on opposite sides of the second plastic connector (300), and slots (620) are respectively provided on opposite sides of the gasket (600), and the buckles (330) and the slots (620) are detachably connected.

6. A shelf connection device according to claim 5, characterized in that: The connection direction of 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), and the first groove (210) and the second groove (220) are arranged at a 90-degree interval along the circumference of the first plastic connector (200). The positioning block (310) can be matched with the first groove (210) or the second groove (220) for sliding connection, so that the connection 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. The shelf connection device according to claim 7, characterized in that: The first plastic connector (200) is provided with an inclined slideway (230) between the first slot (210) and the second slot (220), and the positioning block (310) can be moved from the first slot (210) to the second slot (220) or from the second slot (220) to the first slot (210) via the inclined slideway (230).

9. The shelf connection device according to claim 1, characterized in that: Connecting grooves (130) are provided on opposite sides of the fastener (100); connecting blocks (250) are provided on opposite sides of the first plastic connecting piece (200), and the connecting blocks (250) can be matched and connected with the connecting grooves (130).

10. The 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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