Aluminum alloy storage rack with automatic protection function

Abstract

The present invention relates to the technical field of storage devices, and in particular to an aluminum alloy storage rack with an automatic protection function. An aluminum alloy storage rack with an automatic protection function is provided, which can automatically protect the aluminum alloy by weight and can improve the stability of the protection. The present invention provides such an aluminum alloy storage rack with an automatic protection function, including a storage rack, a load-bearing member, a first telescopic spring, etc. The front and rear sides of the lower part of the storage rack are both slidably connected to the load-bearing member, and the left and right sides of the lower part of the load-bearing member are both symmetrically connected to the front and rear of the first telescopic spring, and the bottom of the first telescopic spring is respectively connected to the storage rack. After the aluminum alloy is placed on the load-bearing member, the present invention can make the second connecting rod lift upward to protect the front and rear sides of the aluminum alloy through the cooperation of the first connecting rod, the first rotating shaft, the second rotating shaft, etc., so that the aluminum alloy can be automatically protected.

Description

Technical Field

[0001] The present invention relates to the technical field of storage devices, in particular to an aluminum alloy storage rack with an automatic protection function. Background Art

[0002] When producing aluminum alloy, it is necessary to place the aluminum alloy on a rack so that it is convenient to store the aluminum alloy. In the prior art, there are many racks for storing aluminum alloy, such as:

[0003] Patent publication number CN211439934U discloses an adjustable casting mold storage rack, including a first storage rack, the first storage rack including four storage support legs formed in a rectangular shape, and also including a storage plate connected to the inner sides of the four storage support legs. The upper side of the first storage rack is sequentially docked with a second storage rack and a third storage rack with the same shape. Two adjacent storage support legs of the first storage rack are flipped and hinged with the storage support legs of the second storage rack on the same side, and two adjacent storage support legs of the second storage rack are flipped and hinged with the storage support legs of the third storage rack on the same side in a one-to-one correspondence.

[0004] The existing storage rack has three storage positions, which can also be used to place aluminum alloy. After the aluminum alloy is placed, protective plates are needed to protect and limit the front and back sides of the aluminum alloy. This requires manual operation, which is more troublesome. Now we are developing an aluminum alloy storage rack with automatic protection function that can automatically protect the aluminum alloy by weight and improve the stability of the protection. Summary of the Invention

[0005] In order to overcome the disadvantages of existing storage racks that require manual installation of protective plates to protect aluminum alloys, which is time-consuming and labor-intensive, the present invention provides an aluminum alloy storage rack with automatic protection function that can automatically protect aluminum alloys by weight and can improve the stability of the protection.

[0006] The technical solution is as follows: An aluminum alloy storage rack with automatic protection function, including:

[0007] The storage rack and the load-bearing parts are slidably connected to the front and rear sides of the lower part of the storage rack, and the load-bearing parts are used to bear the aluminum alloy;

[0008] A first telescopic spring is symmetrically connected to the left and right sides of the lower part of the load-bearing member. The bottom of the first telescopic spring is respectively connected to the storage rack. The first telescopic spring is wound on the load-bearing member;

[0009] A protective mechanism is provided on the storage rack to protect the aluminum alloy;

[0010] A clamping mechanism is provided on the storage rack for clamping the protective mechanism.

[0011] Furthermore, the protection mechanism includes:

[0012] A first connecting rod is rotatably connected to the left and right sides of the bottom of the load-bearing member;

[0013] A second rotating shaft is rotatably connected to the left and right sides of the lower portion of the storage rack;

[0014] The first rotating shaft is connected to the first rotating shaft on both the front and rear sides of the second rotating shaft. The first rotating shaft is rotatably connected to the first connecting rod. The downward movement of the load-bearing member drives the first connecting rod to swing downward, and at the same time drives the first rotating shaft and the second rotating shaft to rotate;

[0015] The first rotating rod is connected to the front and rear sides of the second rotating shaft, and the first rotating rod is provided with a through hole;

[0016] The second connecting rod is rotatably connected between the two first rotating rods on the front side, and is also rotatably connected between the two first rotating rods on the rear side. The second connecting rod protects the aluminum alloy.

[0017] Furthermore, the clamping mechanism includes:

[0018] Fixed frame: fixed frames are welded on both the front and rear sides of the lower part of the storage rack;

[0019] The limiting members are slidably connected to the fixed frame, and the limiting members move toward the side close to each other to clamp the first rotating rod;

[0020] A second telescopic spring is connected between the left and right sides of the limiting component and the fixing frame.

[0021] Furthermore, a top shielding mechanism for shielding the top of the storage rack is included, and the top shielding mechanism includes:

[0022] Fixed racks are welded symmetrically on the left and right sides of the top of the storage rack;

[0023] A shielding frame is slidably connected between the fixed frame and shields the top of the storage frame;

[0024] The fixing bolts are threadedly connected to the fixing frames, and the fixing bolts are inserted into the shielding frames to adjust the height of the shielding frames.

[0025] Furthermore, it also includes an expansion support mechanism for supporting the storage rack in an expansion manner, and the expansion support mechanism includes:

[0026] Support members are rotatably connected to the left and right sides of the lower part of the storage rack, and the support members are supported on the ground after being unfolded;

[0027] A third connecting rod, each support member is connected to a third connecting rod;

[0028] The first fixing block is symmetrically welded on both the left and right sides of the lower part of the storage rack;

[0029] The sliding rod is slidably connected to the first fixed block, and the lower part of the sliding rod is rotatably connected to the third connecting rod;

[0030] The roller is rotatably connected to the upper part of the slide bar;

[0031] The cam and the upper part of the first fixed block are rotatably connected to the cam, and the cam rotates the extrusion roller;

[0032] A second rotating rod, wherein each cam is connected to a second rotating rod;

[0033] A fourth connecting rod is rotatably connected to the second rotating rod;

[0034] The third rotating rod is connected to the front and rear sides of the second rotating shaft. The third rotating rod is rotatably connected to the fourth connecting rod.

[0035] Furthermore, it also includes a fixing mechanism for fixing the left and right sides of the aluminum alloy, and the fixing mechanism includes:

[0036] Fixed plates: Fixed plates are welded on both the upper and lower sides of the fixed frame;

[0037] Fixed plate: There are two fixed plates welded symmetrically on both sides of the storage rack;

[0038] A first rotating buckle is rotatably connected to each of the fixed plates;

[0039] Limiting grid plates are placed on the left and right sides of the top and the left and right sides of the bottom of the storage rack. The limiting grid plates limit the aluminum alloy, and the first rotating buckle clamps the limiting grid plates.

[0040] Furthermore, a front shielding mechanism for shielding the front of the aluminum alloy is included, and the front shielding mechanism includes:

[0041] A rotating member is rotatably connected to the front side of the upper portion of the shielding frame;

[0042] The sliding part is connected with the sliding part at the lower part of the rotating part in a sliding manner.

[0043] Furthermore, it also includes:

[0044] Second fixing blocks are welded on both the left and right sides of the upper front portion of the storage rack;

[0045] The second rotating buckle and the second fixed block are both rotatably connected with the second rotating buckle, and the second rotating buckle buckles the sliding member.

[0046] The present invention has the following advantages: 1. After the aluminum alloy is placed on the load-bearing part, the present invention can lift the second connecting rod upward to protect the front and rear sides of the aluminum alloy through the cooperation of the first connecting rod, the first rotating shaft and the second rotating shaft, thereby automatically protecting the aluminum alloy.

[0047] 2. In the present invention, after the second connecting rod is lifted, the limiting member can limit the second connecting rod, which can improve the stability of the second connecting rod, make the protection effect better, and improve the stability of the protection.

[0048] 3. The present invention adjusts the position of the shielding frame by moving the shielding frame up and down, so that the shielding frame can shield the top of the aluminum alloy and limit the aluminum alloy at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the first viewing angle three-dimensional structure of the present invention.

[0050] Figure 2 This is a schematic diagram of the second viewing angle three-dimensional structure of the present invention.

[0051] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention from a third viewing angle.

[0052] Figure 4 This is a schematic diagram of the first partial three-dimensional structure of the protective mechanism of the present invention.

[0053] Figure 5 This is a schematic diagram of a second partial three-dimensional structure of the protective mechanism of the present invention.

[0054] Figure 6 It is a schematic diagram of the first partial three-dimensional structure of the clamping mechanism of the present invention.

[0055] Figure 7 It is a schematic diagram of the second partial three-dimensional structure of the clamping mechanism of the present invention.

[0056] Figure 8 It is a schematic diagram of the partial three-dimensional structure of the top shielding mechanism of the present invention.

[0057] Figure 9 This is an enlarged three-dimensional structural diagram of point A of the present invention.

[0058] Figure 10 It is a schematic diagram of the three-dimensional structure of the unfolding support mechanism of the present invention.

[0059] Figure 11 This is an enlarged schematic diagram of the three-dimensional structure of point B of the present invention.

[0060] Figure 12It is a schematic diagram of the three-dimensional structure of the fixing mechanism of the present invention.

[0061] Figure 13 It is a partial three-dimensional structural schematic diagram of the front shielding mechanism of the present invention.

[0062] Figure 14 It is a schematic diagram of the three-dimensional structure of the amplifying mechanism at point C of the present invention.

[0063] : The meanings of the reference numerals in the figure are: 1: storage rack, 2: load-bearing member, 3: first telescopic spring, 4: protective mechanism, 41: first connecting rod, 42: first rotating shaft, 43: second rotating shaft, 44: first rotating rod, 45: second connecting rod, 5: clamping mechanism, 51: fixing frame, 52: limiting member, 53: second telescopic spring, 6: top shielding mechanism, 61: fixing frame, 62: shielding frame, 63: fixing bolt, 7: unfolding support mechanism, 71: supporting member, 72: third connecting rod, 73: first fixed block, 74: sliding rod, 75: roller, 76: cam, 77: second rotating rod, 78: fourth connecting rod, 79: third rotating rod, 8: fixing mechanism, 81: fixing plate, 82: limiting grid plate, 83: first rotating buckle, 9: front shielding mechanism, 91: rotating member, 92: sliding member, 93: second fixed block, 94: second rotating buckle. DETAILED DESCRIPTION

[0064] Reference herein to an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of such a phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0065] Example 1

[0066] An aluminum alloy storage rack with automatic protection function, such as Figure 1-Figure 3 As shown, it includes a storage rack 1, a load-bearing member 2, a first telescopic spring 3, a protective mechanism 4 and a clamping mechanism 5. The front and rear sides of the lower part of the storage rack 1 are slidably connected to the load-bearing member 2, and the left and right sides of the lower part of the load-bearing member 2 are symmetrically connected to the front and rear of the first telescopic spring 3. The bottom of the first telescopic spring 3 is respectively connected to the storage rack 1, and the first telescopic spring 3 is wound on the load-bearing member 2. The storage rack 1 is provided with a protective mechanism 4 and a clamping mechanism 5.

[0067] like Figure 2 、 Figure 4 and Figure 5As shown, the protective mechanism 4 includes a first connecting rod 41, a first rotating shaft 42, a second rotating shaft 43, a first rotating rod 44 and a second connecting rod 45. The left and right sides of the bottom of the load-bearing member 2 are rotatably connected to the first connecting rod 41, the left and right sides of the lower part of the storage rack 1 are rotatably connected to the second rotating shaft 43, the front and rear sides of the second rotating shaft 43 are connected to the first rotating shaft 42, the first rotating shaft 42 and the first connecting rod 41 are rotatably connected, the front and rear sides of the second rotating shaft 43 are connected to the first rotating rod 44, and the first rotating rod 44 is provided with a through hole. The second connecting rod 45 is rotatably connected between the two first rotating rods 44 on the front side, and the second connecting rod 45 is also rotatably connected between the two first rotating rods 44 on the rear side.

[0068] like Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, the clamping mechanism 5 includes a fixed frame 51, a limit member 52 and a second telescopic spring 53. The fixed frame 51 is welded on the front and rear sides of the lower part of the storage rack 1. The limit member 52 is slidably connected to the fixed frame 51. The second telescopic spring 53 is connected between the left and right sides of the limit member 52 and the fixed frame 51.

[0069] When people need to place aluminum alloy, they can use the storage rack 1. In the initial state, the first rotating rod 44 contacts the limiting member 52, squeezing the limiting member 52 to move outward, and the second telescopic spring 53 is stretched. First, the aluminum alloy is placed on the load-bearing member 2. Under the action of gravity, the load-bearing member 2 is driven to move downward, and the first telescopic spring 3 is compressed. The load-bearing member 2 drives the first rotating shaft 42 to rotate through the first connecting rod 41, so that the second rotating shaft 43 rotates clockwise and drives the first rotating rod 44 to rotate clockwise. When the through hole on the first rotating rod 44 contacts the limiting member 52, the second telescopic spring 53, which was originally in a stretched state, is reset, driving the limiting member 52 to rotate clockwise. The positioning member 52 moves toward the side that is close to each other, so that the limiting member 52 moves and is inserted into the through hole on the first rotating rod 44, thereby stabilizing the position of the second connecting rod 45, thereby protecting the front and rear edges of the aluminum alloy and preventing the aluminum alloy from falling to the ground. When not in use, the aluminum alloy can be taken out, and the limiting member 52 is moved to the side that is away from each other, so that the second telescopic spring 53 is stretched. After the limiting member 52 and the through hole on the first rotating rod 44 are separated, under the action of the first telescopic spring 3, the load-bearing member 2 is driven to move upward and reset, thereby causing the first rotating rod 44 to rotate counterclockwise and reset, driving the second connecting rod 45 to be retracted downward.

[0070] Example 2

[0071] On the basis of Example 1, Figure 1 、 Figure 2 、 Figure 8 and Figure 9As shown, it also includes a top shielding mechanism 6 that can shield the top of the storage rack 1. The top shielding mechanism 6 includes a fixing frame 61, a shielding frame 62 and a fixing bolt 63. The left and right sides of the top of the storage rack 1 are symmetrically connected to the fixing frames 61 front and back, and the shielding frames 62 are slidably connected between the fixing frames 61. The fixing bolts 63 are threadedly connected to the fixing frames 61.

[0072] The aluminum alloy can also be placed on the top of the storage rack 1, and the height of the shielding frame 62 can be adjusted according to the height of the aluminum alloy. The fixing bolt 63 can be rotated and removed first, and then the shielding frame 62 can be moved up and down for adjustment. After the height is adjusted, the fixing bolt 63 can be rotated and reset, and the height of the shielding frame 62 can be adjusted. In this way, the shielding frame 62 and the aluminum alloy fit together, which can shield the top of the aluminum alloy and limit the position of the aluminum alloy.

[0073] like Figure 1 、 Figure 2 、 Figure 10 and Figure 11 As shown, it also includes an expansion support mechanism 7 for supporting the storage rack 1 in an expanded manner. The expansion support mechanism 7 includes a support member 71, a third connecting rod 72, a first fixed block 73, a slide rod 74, a roller 75, a cam 76, a second rotating rod 77, a fourth connecting rod 78 and a third rotating rod 79. The left and right sides of the lower part of the storage rack 1 are rotatably connected to the support member 71, and the third connecting rod 72 is connected to the support member 71. The left and right sides of the lower part of the storage rack 1 are symmetrically welded with the first fixed block 73. Block 73, the first fixed block 73 is slidably connected to a slide rod 74, the lower part of the slide rod 74 is rotatably connected to the third connecting rod 72, the upper part of the slide rod 74 is rotatably connected to a roller 75, the upper part of the first fixed block 73 is rotatably connected to a cam 76, the cam 76 is connected to a second rotating rod 77, the second rotating rod 77 is rotatably connected to a fourth connecting rod 78, the front and rear sides of the second rotating shaft 43 are connected to a third rotating rod 79, and the third rotating rod 79 and the fourth connecting rod 78 are rotatably connected.

[0074] When the second rotating shaft 43 rotates clockwise, it drives the third rotating rod 79 to rotate clockwise, and drives the second rotating rod 77 to rotate through the fourth connecting rod 78, so that the cam 76 rotates the extrusion roller 75, drives the roller 75 and the sliding rod 74 to move downward, and the sliding rod 74 drives the third connecting rod 72 to move downward, and the third connecting rod 72 drives the support member 71 to rotate and unfold outward, so that the support member 71 can be unfolded and supported on the ground. This can improve the stability of the storage rack 1 and make it more convenient for people to place aluminum alloy. When the second rotating shaft 43 rotates counterclockwise, it drives the third rotating rod 79 to rotate counterclockwise, and drives the cam 76 to reverse through the fourth connecting rod 78 and the second rotating rod 77, so that the cam 76 and the roller 75 are separated, and the support member 71 is rotated back to its original position and retracted. Repeating the above operation can make it convenient for people to automatically rotate and unfold the support member 71, thereby improving the stability of the entire storage rack 1.

[0075] like Figure 1 、 Figure 2 、 Figure 4 and Figure 12 As shown, it also includes a fixing mechanism 8 for fixing the left and right sides of the aluminum alloy. The fixing mechanism 8 includes a fixing plate 81, a limiting grid plate 82 and a first rotating buckle 83. The fixing frame 61 is welded with a fixing plate 81 on both the upper and lower sides. The left and right sides of the storage rack 1 are both symmetrically welded with two fixing plates 81. The first rotating buckle 83 is rotatably connected to the fixing plate 81. Limiting grid plates 82 are placed on the left and right sides of the top and the left and right sides of the bottom of the storage rack 1.

[0076] If the aluminum alloy needs to be limited, the limiting grid plate 82 can be used to limit and fix the left and right sides of the aluminum alloy. If the limiting grid plate 82 needs to be replaced, the first rotating buckle 83 can be rotated to remove the limiting grid plate 82. When it is used again, the limiting grid plate 82 can be reset so that the first rotating buckle 83 rotates and buckles the limiting grid plate 82.

[0077] like Figure 1 、 Figure 2 、 Figure 13 and Figure 14 As shown, it also includes a front shielding mechanism 9 that can shield the front of the aluminum alloy. The front shielding mechanism 9 includes a rotating part 91 and a sliding part 92. The upper front side of the shielding frame 62 is rotatably connected to the rotating part 91, and the lower part of the rotating part 91 is slidably connected to the sliding part 92.

[0078] like Figure 13 As shown, it also includes a second fixed block 93 and a second rotating buckle 94. The second fixed blocks 93 are welded on both sides of the left and right sides of the upper front part of the storage rack 1, and the second rotating buckle 94 is rotatably connected to the second fixed blocks 93.

[0079] When the aluminum alloy is placed on the upper layer, the second rotating buckle 94 can be rotated forward so that the second rotating buckle 94 releases the sliding part 92, and then the sliding part 92 is swung upward. If the aluminum alloy is placed, the sliding part 92 can be rotated and reset after completion, and then the second rotating buckle 94 can be rotated and reset to clamp the sliding part 92. In this way, the sliding part 92 and the rotating part 91 can block and limit the aluminum alloy.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aluminum alloy storage rack with automatic protection function, characterized in that: Includes: A storage rack (1) and a load-bearing member (2), wherein both front and rear sides of the lower portion of the storage rack (1) are slidably connected to the load-bearing member (2), and the load-bearing member (2) is used to bear the aluminum alloy; A first telescopic spring (3), wherein the first telescopic spring (3) is symmetrically connected to the left and right sides of the lower portion of the load-bearing member (2) in a front-to-back manner, and the bottoms of the first telescopic spring (3) are respectively connected to the storage rack (1), and the first telescopic spring (3) is wound on the load-bearing member (2); A protective mechanism (4) is provided on the storage rack (1) for protecting the aluminum alloy; A clamping mechanism (5) is provided on the storage rack (1) for clamping the protective mechanism (4); The protection mechanism (4) includes: A first connecting rod (41), the left and right sides of the bottom of the load-bearing member (2) are both rotatably connected to the first connecting rod (41); A second rotating shaft (43), the left and right sides of the lower portion of the storage rack (1) are both rotatably connected to the second rotating shaft (43); The first rotating shaft (42) and the second rotating shaft (43) are both connected to the first rotating shaft (42) on both the front and rear sides. The first rotating shaft (42) and the first connecting rod (41) are rotatably connected. The load-bearing member (2) moves downward to drive the first connecting rod (41) to swing downward, and at the same time drives the first rotating shaft (42) and the second rotating shaft (43) to rotate. The first rotating rod (44) is connected to the front and rear sides of the second rotating shaft (43), and the first rotating rod (44) is provided with a through hole; The second connecting rod (45) is rotatably connected between the two first rotating rods (44) on the front side, and the second connecting rod (45) is also rotatably connected between the two first rotating rods (44) on the rear side. The second connecting rod (45) protects the aluminum alloy.

2. The aluminum alloy storage rack with automatic protection function according to claim 1 is characterized in that: The clamping mechanism (5) comprises: A fixed frame (51), wherein the front and rear sides of the lower portion of the storage rack (1) are welded with a fixed frame (51); The limiting member (52) is slidably connected to the fixing frame (51), and the limiting member (52) moves toward one side close to each other to clamp the first rotating rod (44); A second telescopic spring (53) is connected between the left and right sides of the limiting member (52) and the fixing frame (51).

3. The aluminum alloy storage rack with automatic protection function according to claim 2, characterized in that: It also includes a top shielding mechanism (6) for shielding the top of the storage rack (1), and the top shielding mechanism (6) includes: A fixing frame (61) is welded symmetrically on both the left and right sides of the top of the storage frame (1); A shielding frame (62) is slidably connected between the fixing frame (61), and the shielding frame (62) shields the upper portion of the storage frame (1); The fixing bolt (63) is threadedly connected to the fixing frame (61), and the fixing bolt (63) is inserted into the shielding frame (62), thereby adjusting the height of the shielding frame (62).

4. The aluminum alloy storage rack with automatic protection function according to claim 3 is characterized in that: It also includes an expansion support mechanism (7) for supporting the storage rack (1) in an expansion manner, and the expansion support mechanism (7) includes: Support members (71), both left and right sides of the lower portion of the storage rack (1) are rotatably connected to support members (71), and the support members (71) are supported on the ground after being unfolded; A third connecting rod (72), each of the support members (71) is connected to a third connecting rod (72); A first fixing block (73), wherein the first fixing block (73) is welded symmetrically front and back on both left and right sides of the lower portion of the storage rack (1); The sliding rod (74) is slidably connected to the first fixed block (73), and the lower part of the sliding rod (74) is rotatably connected to the third connecting rod (72); The roller (75) and the upper portion of the slide rod (74) are both rotatably connected to the roller (75); The cam (76) is rotatably connected to the upper portion of the first fixed block (73), and the cam (76) rotates the extrusion roller (75); A second rotating rod (77) is connected to the cam (76); A fourth connecting rod (78), the second rotating rod (77) is rotatably connected to the fourth connecting rod (78); The third rotating rod (79) is connected to both the front and rear sides of the second rotating shaft (43). The third rotating rod (79) is rotatably connected to the fourth connecting rod (78).

5. The aluminum alloy storage rack with automatic protection function according to claim 4, characterized in that: It also includes a fixing mechanism (8) for fixing the left and right sides of the aluminum alloy, and the fixing mechanism (8) includes: A fixing plate (81) is welded to the upper and lower sides of the fixing frame (61); A fixing plate (81), two fixing plates (81) are welded symmetrically on both the left and right sides of the storage rack (1); A first rotating buckle (83), the fixed plate (81) is rotatably connected to the first rotating buckle (83); The limiting grid plate (82) is placed on both the left and right sides of the top and the left and right sides of the bottom of the storage rack (1), the limiting grid plate (82) limits the aluminum alloy, and the first rotating buckle (83) clamps the limiting grid plate (82).

6. The aluminum alloy storage rack with automatic protection function according to claim 5, characterized in that: It also includes a front shielding mechanism (9) for shielding the front of the aluminum alloy, and the front shielding mechanism (9) includes: A rotating member (91) is rotatably connected to the front upper portion of the shielding frame (62); The sliding member (92) is slidably connected to the lower portion of the rotating member (91).

7. The aluminum alloy storage rack with automatic protection function according to claim 6, characterized in that: Also included are: A second fixing block (93), with second fixing blocks (93) welded to both left and right sides of the upper front portion of the storage rack (1); The second rotating buckle (94) is rotatably connected to the second fixed block (93), and the second rotating buckle (94) buckles the sliding member (92).

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