A supporting device for preventing a bookshelf from tipping over

Abstract

The present invention relates to a bookshelf support device, and in particular to a bookshelf anti-tipping support device. Provided is a bookshelf anti-tipping support device that can limit the front, back, left, and right sides of a bookshelf and has a comprehensive anti-tipping effect. The present invention is achieved through the following technical means: a bookshelf anti-tipping support device includes a supporting foot, a base, an adjusting screw and a universal wheel. The left and right sides of the base are both symmetrically threaded with adjusting screws, and the bottom of the adjusting screw is rotatably provided with supporting feet. The left and right sides of the bottom of the base are both symmetrically provided with universal wheels. After the limiting plate is rotated inward, it can resist the left and right sides of the bookshelf, so that it can form a limit on the front, back, left, and right sides of the bookshelf with the baffle plate and the guide groove plate, thereby further improving the effect of preventing the bookshelf from tipping over.

Description

Technical Field

[0001] The invention relates to a bookshelf supporting device, in particular to a bookshelf anti-tilting supporting device. Background Art

[0002] In order to facilitate the borrowing of books in the library, the books are often neatly arranged on the bookshelf. In this case, the bookshelf needs to be anti-tipping to prevent the bookshelf from tipping over and making it difficult to sort and arrange the books when they are mixed together. In this way, the bookshelf anti-tipping support device can be used.

[0003] The existing anti-tipping support device for bookshelf includes supporting feet, a base, an adjusting screw rod, universal wheels and a baffle plate. The left and right sides of the base are both symmetrically provided with adjusting screw rods in a threaded manner. The bottom of the adjusting screw rod is rotatably provided with supporting feet. The left and right sides of the bottom of the base are both symmetrically provided with universal wheels in a front-to-back manner. The front and back sides of the middle of the top of the base are both provided with baffle plates. After the bookshelf is placed on the base, the baffle plate can block the front and back sides of the bookshelf, thereby limiting the position of the bookshelf, which can prevent the bookshelf from tipping over. However, the device only limits the front and back sides of the bookshelf, and the bookshelf may still tip over to the left and right. In this way, the anti-tipping effect of the bookshelf is not comprehensive.

[0004] Therefore, it is necessary to design a supporting device for preventing a bookshelf from tipping over, which can limit the front, back, left, right and other four sides of the bookshelf and has a comprehensive anti-tipping effect. Summary of the invention

[0005] In order to overcome the disadvantage that the existing anti-tipping support device for bookshelf only limits the front and rear sides of the bookshelf, and the bookshelf may still tilt left and right, so the anti-tipping effect of the bookshelf is not comprehensive, a support device for anti-tipping of bookshelf is provided, which can limit the front, back, left and right sides of the bookshelf and has a comprehensive anti-tipping effect.

[0006] The present invention is achieved through the following technical approaches: a support device for preventing a bookshelf from tipping over, comprising support feet, a base, an adjusting screw and a universal wheel, wherein the left and right sides of the base are both symmetrically provided with adjusting screws in a threaded manner, and the bottom of the adjusting screws are both rotatably provided with support feet, and the left and right sides of the bottom of the base are both symmetrically provided with universal wheels in a front and back manner, and further comprising a placing mechanism, an anti-tipping component and a limiting mechanism, wherein the top of the base is provided with a placing mechanism capable of placing a bookshelf, the middle of the top of the base is provided with an anti-tipping component capable of limiting the front and back sides of the bookshelf, and a limiting mechanism capable of limiting the left and right sides of the bookshelf is connected between the base and the placing mechanism.

[0007] As a preferred technical approach of the present invention, the placement mechanism includes guide columns, a placement plate, a connecting block and a first return spring. Guide columns are symmetrically arranged on the left and right sides of the top of the base, and connecting blocks are slidably arranged on the upper sides of the guide columns. The bottoms of the connecting blocks are connected to the adjacent guide columns with first return springs, and placement plates capable of placing bookshelves are connected between the connecting blocks.

[0008] As a preferred technical approach of the present invention, the anti-dumping component includes a guide groove plate, a baffle, a handle, a guide cylinder, a second return spring and a locking column. The guide groove plate is symmetrically arranged in the middle of the top of the base, and the guide groove plate is slidably provided with a baffle that can block the front and back sides of the bookshelf. The upper outer part of the baffle is provided with a handle, and the upper part of the guide groove plate is symmetrically provided with a guide cylinder, and the guide cylinder is slidably provided with a locking column. The second return spring is connected between the outer end of the locking column and the adjacent guide cylinder, and the lower part of the baffle is symmetrically provided with a locking hole that fits with the locking column.

[0009] As a preferred technical approach of the present invention, the limiting mechanism includes an installation slot plate, a fourth reset spring, a slider, a second torsion spring, a limit plate, a contact block and a lower pressure plate. The installation slot plates are symmetrically arranged on the left and right sides of the top of the base, and the installation slot plates are located on the outside of the installation tube. Slide blocks are slidably connected between the inner upper sides of the installation slot plates on the left and right sides, and the bottom of the slider is connected to the adjacent installation slot plates with a fourth reset spring. The sliders on the left and right sides are rotatably provided with limit plates that can resist the left and right sides of the bookshelf after rotation, and the second torsion spring is connected between the front and rear sides of the limit plate and the adjacent sliders, and contact blocks are arranged on the front and rear sides of the lower part of the limit plate, and lower pressure plates are symmetrically arranged on the left and right sides of the placement plate, and the lower pressure plates are in contact with the adjacent contact blocks.

[0010] As a preferred technical approach of the present invention, it also includes a shock-absorbing mechanism that can achieve a shock-absorbing effect when the placement plate moves downward. The shock-absorbing mechanism includes a mounting tube, a third return spring and a shock-absorbing column. Mounting tubes are symmetrically arranged on the left and right sides of the top of the base. The mounting tubes are located on the outside of the guide column. Shock-absorbing columns that can achieve a shock-absorbing effect are slidably arranged in the mounting tubes. The bottom of the shock-absorbing column is connected to the base with a third return spring.

[0011] As a preferred technical approach of the present invention, it also includes a positioning mechanism that can clamp the bookshelf on the placement plate. The positioning mechanism includes a mounting shaft, a first torsion spring and a positioning column. The placement plate is symmetrically provided with mounting shafts on both sides of the left and right sides. The mounting shafts are rotatably provided with positioning columns that can clamp the bookshelf on the placement plate after rotation. The first torsion springs are connected between the left and right sides of the positioning columns and the adjacent mounting shafts.

[0012] As a preferred technical approach of the present invention, it also includes a locking mechanism, which includes a first wedge block, a second wedge block, a push rod, a cam, a mounting frame, a locking plate, a fifth reset spring and a third torsion spring. A first wedge block is provided in the middle of the bottom of the slider, push rods are slidably provided on the left and right sides of the base, second wedge blocks are provided on the outer ends of the push rods, a cam is rotatably provided in the middle of the top of the base, a third torsion spring is connected between the lower part of the cam and the base, mounting frames are symmetrically provided on the left and right sides of the middle of the top of the base, a locking plate is slidably connected between the mounting frames on the front and rear sides, the locking plate and the push rod are in contact with the cam, the locking plate and the adjacent mounting frame are connected with a fifth reset spring, and the connecting blocks are provided with a slot that fits the locking plate.

[0013] As a preferred technical approach of the present invention, the shock absorbing column is made of rubber.

[0014] Compared with the prior art, the present invention has significant improvements in that: 1. After the baffle is pulled upward from the guide groove, the baffle and the guide groove cooperate to limit the front and rear sides of the bookshelf to a larger area, thereby preventing the bookshelf from tilting better.

[0015] 2. When placing the bookshelf on the placement board, the positioning column will rotate, so that the positioning column can limit the bookshelf, making it difficult for the bookshelf to detach from the placement board, thereby further improving the effect of preventing the bookshelf from tilting.

[0016] 3. After the limit plate is rotated inward, it can be pressed against the left and right sides of the book shelf, so that it can form a limit on the front, back, left and right sides of the book shelf together with the baffle plate and the guide groove plate, further improving the effect of preventing the book shelf from tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the placement mechanism of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the dumping assembly of the present invention.

[0020] Figure 4 It is a schematic cross-sectional view of the dumping assembly of the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the shock absorbing mechanism of the present invention.

[0022] Figure 6 It is a schematic cross-sectional structural diagram of the shock absorbing mechanism of the present invention.

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the positioning mechanism of the present invention.

[0024] Figure 8 This is a schematic diagram of the enlarged structure of part A of the present invention.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0026] Fig.10 This is a schematic diagram of the enlarged structure of part B of the present invention.

[0027] Fig.11 It is a schematic diagram of a first three-dimensional structure of the locking mechanism of the present invention.

[0028] Fig.12 It is a schematic diagram of a second three-dimensional structure of the locking mechanism of the present invention.

[0029] Among them: 1_support foot, 2_base, 3_adjusting screw, 4_universal wheel, 5_placing mechanism, 51_guide column, 52_placing plate, 53_connecting block, 54_first return spring, 6_anti-dumping assembly, 61_guide groove plate, 62_baffle, 63_handle, 64_guide cylinder, 65_second return spring, 66_positioning column, 7_shock-absorbing mechanism, 71_installation cylinder, 72_third return spring, 73_shock-absorbing column, 8_positioning mechanism, 81_installation Shaft, 82_first torsion spring, 83_positioning column, 9_limiting mechanism, 91_mounting slot plate, 92_fourth return spring, 93_slider, 94_second torsion spring, 95_limiting plate, 96_contact block, 97_down pressure plate, 10_locking mechanism, 101_first wedge block, 102_second wedge block, 103_push rod, 104_cam, 105_mounting frame, 106_locking plate, 107_fifth return spring, 108_third torsion spring. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] Example 1

[0032] A support device for preventing a bookshelf from tipping over, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig. 9 and Fig.10As shown, it includes a supporting foot 1, a base 2, an adjusting screw 3, a universal wheel 4, a placing mechanism 5, an anti-dumping component 6 and a limiting mechanism 9. The left and right sides of the base 2 are both symmetrically threaded with adjusting screws 3, and the bottom of the adjusting screw 3 is rotatably provided with a supporting foot 1. The left and right sides of the bottom of the base 2 are both symmetrically provided with universal wheels 4. The top of the base 2 is provided with a placing mechanism 5, and the placing mechanism 5 can place the book shelf. The middle of the top of the base 2 is provided with an anti-dumping component 6, and the anti-dumping component 6 can limit the front and back sides of the book shelf. The limiting mechanism 9 is connected between the base 2 and the placing mechanism 5, and the limiting mechanism 9 can limit the left and right sides of the book shelf.

[0033] Reference Figure 2 As shown, the placement mechanism 5 includes a guide column 51, a placement plate 52, a connecting block 53 and a first return spring 54. The guide columns 51 are symmetrically provided on the left and right sides of the top of the base 2 by welding. The connecting blocks 53 are slidably provided on the upper sides of the guide columns 51. The bottoms of the connecting blocks 53 are connected to the adjacent guide columns 51 with the first return spring 54. The placing plates 52 are connected between the connecting blocks 53 by welding, and the placing plates 52 can place the bookshelves.

[0034] Reference Figure 3-4 As shown, the anti-dumping assembly 6 includes a guide groove plate 61, a baffle plate 62, a handle 63, a guide cylinder 64, a second return spring 65 and a locking column 66. The guide groove plate 61 is symmetrically fixed to the middle of the top of the base 2 by bolts. Baffle plates 62 are slidably provided in the guide groove plate 61. The baffle plates 62 can block the front and back sides of the bookshelf. The handles 63 are fixed to the upper outer side of the baffle plate 62 by bolts. The upper part of the guide groove plate 61 is symmetrically provided with guide cylinders 64 by welding. The guide cylinders 64 are slidably provided with locking columns 66. The outer ends of the locking columns 66 and the adjacent guide cylinders 64 are connected with second return springs 65. The lower part of the baffle plate 62 is symmetrically provided with locking holes that fit with the locking columns 66.

[0035] Reference Figure 9-10As shown, the limiting mechanism 9 includes a mounting slot plate 91, a fourth return spring 92, a slider 93, a second torsion spring 94, a limiting plate 95, a contact block 96 and a lower pressure plate 97. The left and right sides of the top of the base 2 are symmetrically fixed with mounting slot plates 91 by bolts. The mounting slot plates 91 are located outside the mounting tube 71. Slide blocks 93 are slidably connected between the upper sides of the mounting slot plates 91 on the left and right sides. The bottoms of the sliders 93 are connected to the adjacent mounting slot plates 91 with fourth return springs 92. Limiting plates 95 are rotatably provided on the sliders 93 on the left and right sides. After the limiting plates 95 are rotated, they can resist the left and right sides of the book shelf. The second torsion springs 94 are connected between the front and rear sides of the limiting plates 95 and the adjacent sliders 93. Contact blocks 96 are provided on the front and rear sides of the lower part of the limiting plates 95 by welding. Lower pressure plates 97 are symmetrically welded on the left and right sides of the placement plate 52. The lower pressure plates 97 are in contact with the adjacent contact blocks 96.

[0036] When it is necessary to place a bookshelf, the staff can place the bookshelf on the placement plate 52. At this time, the placement plate 52 will move downward under the weight of the bookshelf. The downward movement of the placement plate 52 drives the connecting block 53 to move downward, and the first return spring 54 is compressed. Initially, the second return spring 65 is compressed. Then the staff can pull the baffle plate 62 upward through the handle 63. When the clamping hole of the baffle plate 62 fits with the clamping column 66, the clamping column 66 moves inward and is clamped into the clamping hole of the baffle plate 62 under the action of the second return spring 65, so that the baffle plate 62 can be fixed. In this way, the baffle plate 62 and the guide groove are used to fix the baffle plate 62. The plate 61 can be against the front and rear sides of the bookshelf, so that the bookshelf can be prevented from tipping over on the placement plate 52. The placement plate 52 moves downward to drive the lower pressure plate 97 to move downward, and the lower pressure plate 97 moves downward to drive the contact block 96 to rotate inward, and the contact block 96 rotates inward to drive the limit plate 95 to rotate inward to press against the left and right sides of the bookshelf, and the second torsion spring 94 is deformed. When the limit plate 95 is pressed by the slider 93 and cannot continue to rotate, the placement plate 52 continues to drive the lower pressure plate 97 to move downward, so that the lower pressure plate 97 moves downward to drive the contact block 96 to move downward, and the contact block 96 moves downward to drive the limit plate 95 to rotate inward to press against the left and right sides of the bookshelf. The positioning plate 95 and the slider 93 move downward, and the fourth return spring 92 is compressed, so that the book shelf can be limited on the front, back, left and right sides, and the effect of preventing the book shelf from tipping over can be further improved. When the placement position of the book shelf needs to be changed, the staff can rotate the adjusting screw rod 3 to make the base 2 drive the universal wheel 4 to move downward, and the universal wheel 4 can move downward to contact the ground, and then the base 2 can be pushed to move. At this time, the universal wheel 4 rotates, so that the device can be moved to the target ground. When it moves to the appropriate position, the base 2 can be stopped from being pushed, and the adjusting screw rod 3 can be rotated in the opposite direction to make the base 2 drive the universal wheel 4 to move upward The bookshelf can be directly taken out by upward reset. At this time, the connecting block 53 and the placing plate 52 move upward and reset under the action of the first reset spring 54. When the placing plate 52 moves upward and drives the lower pressure plate 97 to move upward, the contact block 96 and the limit plate 95 rotate and reset under the action of the second torsion spring 94. The slider 93, the contact block 96 and the limit plate 95 move upward and reset under the action of the fourth reset spring 92. Then, the locking column 66 can be pulled outward to release the baffle 62. The second reset spring 65 is compressed, and the handle 63 and the baffle 62 move downward and reset under the action of gravity.

[0037] Example 2

[0038] Based on Example 1, Figure 1 , Figure 5 and Figure 6As shown, it also includes a shock-absorbing mechanism 7, which can have a shock-absorbing effect when the placement plate 52 moves downward. The shock-absorbing mechanism 7 includes a mounting tube 71, a third return spring 72 and a shock-absorbing column 73. The left and right sides of the top of the base 2 are symmetrically provided with mounting tubes 71 by welding. The mounting tubes 71 are located on the outside of the guide column 51. The mounting tubes 71 are slidably provided with shock-absorbing columns 73. The shock-absorbing columns 73 can have a shock-absorbing effect. The shock-absorbing columns 73 are made of rubber. The bottom of the shock-absorbing columns 73 is connected to the base 2 with a third return spring 72.

[0039] The placement plate 52 moves downward until it contacts the shock-absorbing column 73 and then continues to move, so that the shock-absorbing column 73 moves downward and the third return spring 72 is compressed. At the same time, because the shock-absorbing column 73 is made of rubber, the shock-absorbing column 73 and the third return spring 72 can play a role in cushioning the placement plate 52, preventing the placement plate 52 from moving downward too fast and colliding with the base 2. When the bookshelf is taken out and the placement plate 52 moves upward, the shock-absorbing column 73 moves upward and resets under the action of the third return spring 72.

[0040] Reference Figure 1 , Figure 7 and Figure 8 As shown, it also includes a positioning mechanism 8, which can clamp the book shelf on the placement plate 52. The positioning mechanism 8 includes a mounting shaft 81, a first torsion spring 82 and a positioning column 83. The placement plate 52 has mounting shafts 81 on both sides thereof symmetrically front and back through welding. The mounting shafts 81 are rotatably provided with positioning columns 83. After the positioning columns 83 are rotated, the book shelf can be clamped on the placement plate 52. The first torsion springs 82 are connected between the left and right sides of the positioning columns 83 and the adjacent mounting shafts 81.

[0041] When the bookshelf is placed on the placement plate 52, it will press on the positioning column 83, so that the positioning column 83 rotates, and the first torsion spring 82 is deformed, so that the positioning column 83 can resist the bookshelf, so that the bookshelf can be limited on the placement plate 52, and then the bookshelf can be further prevented from being separated from the placement plate 52, so as to better prevent the bookshelf from tipping over, because the positioning column 83 will not affect the up and down movement of the bookshelf, so when the bookshelf needs to be taken out, the staff can move the bookshelf upward to be taken out, so that the bookshelf does not press on the positioning column 83, and the positioning column 83 rotates and resets under the action of the first torsion spring 82.

[0042] Reference Figure 1 , Fig.11 and Fig.12As shown, the locking mechanism 10 is also included, and the locking mechanism 10 includes a first wedge block 101, a second wedge block 102, a push rod 103, a cam 104, a mounting frame 105, a locking plate 106, a fifth reset spring 107 and a third torsion spring 108. The first wedge block 101 is welded in the middle of the bottom of the slider 93, and the push rod 103 is slidably provided on the left and right sides of the base 2. The outer ends of the push rods 103 are welded with second wedge blocks 102. After the first wedge block 101 moves downward, it will engage with the second wedge block 1 02 contact, a cam 104 is rotatably provided in the middle of the top of the base 2, a third torsion spring 108 is connected between the lower part of the cam 104 and the base 2, and mounting frames 105 are symmetrically fixed to the left and right sides of the middle of the top of the base 2 by bolts, and a locking plate 106 is slidably connected between the mounting frames 105 on the front and rear sides, the locking plate 106 and the push rod 103 are in contact with the cam 104, and a fifth reset spring 107 is connected between the locking plate 106 and the adjacent mounting frame 105, and a slot matching the locking plate 106 is opened on the connecting block 53.

[0043] The downward movement of the slider 93 drives the first wedge block 101 to move downward. After the first wedge block 101 moves downward until it contacts the second wedge block 102 and continues to move, the second wedge block 102 can move inward. The inward movement of the second wedge block 102 drives the push rod 103 to move inward. The inward movement of the push rod 103 drives the cam 104 to rotate. The rotation of the cam 104 drives the positioning plate 106 to move outward. The fifth return spring 107 is compressed, and the third torsion spring 108 is deformed. The positioning plate 106 moves outward and can be stuck in the slot of the connecting block 53, so that the positioning plate 106 can clamp the connecting block 53 and fix it. The placing plate 52 is prevented from shaking when the bookshelf is pushed carelessly, thereby causing the placing plate 52 to move, causing the bookshelf to be loosened and easily pushed down. After the bookshelf is taken out, the force of the first reset spring 54 is greater than the force of the fifth reset spring 107, so that the placing plate 52 and the connecting block 53 can move upward and reset, and then the positioning plate 106 moves inward and resets, and the fifth reset spring 107 resets. Under the action of the third torsion spring 108, the cam 104 rotates and resets, so that the push rod 103 and the second wedge block 102 can move outward and reset, and the slider 93 moves upward to drive the first wedge block 101 to move upward.

[0044] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A support device for preventing a book shelf from tipping over, comprising a support foot (1), a base (2), an adjusting screw rod (3) and a universal wheel (4), wherein the base (2) is provided with an adjusting screw rod (3) symmetrically in front and back in a threaded manner on both left and right sides, the adjusting screw rod (3) is provided with a support foot (1) in a rotatable manner at the bottom, and the base (2) is provided with a universal wheel (4) symmetrically in front and back in both left and right sides of the bottom, wherein: It also comprises a placement mechanism (5), an anti-tipping component (6) and a limiting mechanism (9); the placement mechanism (5) capable of placing a bookshelf is provided on the top of the base (2); the anti-tipping component (6) capable of limiting the front and rear sides of the bookshelf is provided in the middle of the top of the base (2); and the limiting mechanism (9) capable of limiting the left and right sides of the bookshelf is connected between the base (2) and the placement mechanism (5); The placement mechanism (5) comprises a guide column (51), a placement plate (52), a connection block (53) and a first return spring (54); the guide columns (51) are symmetrically arranged on the left and right sides of the top of the base (2); the connection blocks (53) are slidably arranged on the upper sides of the guide columns (51); the bottoms of the connection blocks (53) are connected to the first return spring (54) between the adjacent guide columns (51); and the placement plates (52) capable of placing the bookshelf are connected between the connection blocks (53); The anti-dumping assembly (6) comprises a guide groove plate (61), a baffle plate (62), a handle (63), a guide cylinder (64), a second return spring (65) and a locking column (66). The guide groove plate (61) is symmetrically arranged in the middle of the top of the base (2) in a front-to-back manner. The guide groove plate (61) is slidably provided with a baffle plate (62) capable of blocking the front and rear sides of the book shelf. The upper outer part of the baffle plate (62) is provided with a handle (63). The upper part of the guide groove plate (61) is symmetrically provided with a guide cylinder (64). The guide cylinder (64) is slidably provided with a locking column (66). The outer end of the locking column (66) and the adjacent guide cylinder (64) are connected to the second return spring (65). The lower part of the baffle plate (62) is symmetrically provided with a locking hole that fits with the locking column (66). The limiting mechanism (9) comprises a mounting groove plate (91), a fourth return spring (92), a slider (93), a second torsion spring (94), a limiting plate (95), a contact block (96) and a lower pressure plate (97). The mounting groove plates (91) are symmetrically arranged on both the left and right sides of the top of the base (2). The mounting groove plates (91) are located outside the mounting tube (71). The sliders (93) are slidably connected between the inner upper sides of the mounting groove plates (91) on the left and right sides. The bottoms of the sliders (93) are connected to the adjacent mounting groove plates ( A fourth return spring (92) is connected between the two sliding blocks (91), and the sliders (93) on the left and right sides are rotatably provided with limit plates (95) that can resist the left and right sides of the bookshelf after rotation, and a second torsion spring (94) is connected between the front and rear sides of the limit plates (95) and the adjacent sliders (93), and contact blocks (96) are provided on the front and rear sides of the lower part of the limit plates (95), and lower pressure plates (97) are symmetrically provided on the left and right sides of the placement plate (52), and the lower pressure plates (97) are in contact with the adjacent contact blocks (96); The device also includes a positioning mechanism (8) capable of clamping the bookshelf on the placement plate (52), the positioning mechanism (8) comprising a mounting shaft (81), a first torsion spring (82) and a positioning column (83), the placement plate (52) being provided with mounting shafts (81) symmetrically front and rear on both left and right sides, the mounting shafts (81) being rotatably provided with positioning columns (83) capable of clamping the bookshelf on the placement plate (52) after rotation, and the first torsion spring (82) being connected between both left and right sides of the positioning column (83) and the adjacent mounting shafts (81); The invention also comprises a locking mechanism (10), which comprises a first wedge block (101), a second wedge block (102), a push rod (103), a cam (104), a mounting frame (105), a locking plate (106), a fifth return spring (107) and a third torsion spring (108). The first wedge block (101) is provided in the middle of the bottom of the slider (93), push rods (103) are slidably provided on both sides of the base (2), and second wedge blocks (102) are provided at the outer ends of the push rods (103). A cam is rotatably provided in the middle of the top of the base (2). The cam (104) is provided with a third torsion spring (108) between the lower part of the cam (104) and the base (2); mounting frames (105) are symmetrically arranged on the left and right sides of the top middle of the base (2); a locking plate (106) is slidably connected between the mounting frames (105) on the front and rear sides; the locking plate (106) and the push rod (103) are in contact with the cam (104); a fifth return spring (107) is connected between the locking plate (106) and the adjacent mounting frame (105); and a locking groove that fits with the locking plate (106) is opened on the connecting block (53).

2. A bookshelf anti-tilting support device as claimed in claim 1, characterized in that: The invention also comprises a shock absorbing mechanism (7) capable of achieving a shock absorbing effect when the placement plate (52) moves downward, the shock absorbing mechanism (7) comprising a mounting tube (71), a third return spring (72) and a shock absorbing column (73), the mounting tubes (71) being symmetrically arranged on both left and right sides of the top of the base (2), the mounting tubes (71) being located outside the guide column (51), the shock absorbing columns (73) being slidably arranged in the mounting tubes (71) and the bottom of the shock absorbing columns (73) being connected to the base (2) with the third return spring (72).

3. A bookshelf anti-tilting support device as claimed in claim 2, characterized in that: The shock absorbing column (73) is made of rubber.

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