Automatic bolt mounting and fixing mechanism for display base plastic plate

Abstract

The invention discloses a display base plastic plate automatic bolt mounting fixing mechanism which comprises a fixing bottom plate, a middle fixing plate is fixed to the middle of the top face of the fixing bottom plate, and front-back moving mechanisms extending front and back are fixed to the left portion and the right portion of the top face of the middle fixing plate correspondingly. Vertical columns are fixed to the top faces of moving blocks of the two front-back moving mechanisms, an upper transverse beam is fixed to the top faces of the two vertical columns, a linear module extending transversely is fixed to the top face of the upper transverse beam, and a second linear module extending vertically is fixed to the front wall face of a moving block of the linear module. A vertical supporting frame is fixed to the front wall face of a moving block of the second linear module, and a screw locking machine main machine head is fixed to the middle of the top face of a bottom plate of the vertical supporting frame. The device can automatically grab a display base clamped with a metal bent part, place the display base on the turnover plate to realize automatic clamping, and automatically feed screws and then discharge the screws, so that full-automatic operation is realized, the labor amount of workers is greatly reduced, and the use effect is good.

Description

Technical Field

[0001] This invention relates to the field of display base processing equipment technology, and more specifically to an automatic bolt fixing mechanism for display base plastic plates. Background Technology

[0002] In the current manufacturing process of monitor stands, a metal plate needs to be fixed to a plastic plate with bolts. The existing method is to first clamp the bent metal part onto the top and bottom surfaces of the plastic plate, and then fix it with bolts. Then, the bolts are manually screwed onto the metal plate. This requires fixing the top plate of the bent metal plate to the top surface of the plastic plate, and then fixing the bottom surface of the plastic plate to the bottom plate of the bent metal plate. This manual fixing is inefficient and has poor results.

[0003] Therefore, an automatic screw fastening machine can be used to automatically install screws. However, a corresponding clamping structure is required to achieve automation, and such a structure does not currently exist. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic bolt fixing mechanism for a display base plastic plate. It can automatically grab a display base with a metal bent part, place it on a flip plate for automatic clamping, automatically screw it on, and then automatically unload it, achieving fully automatic operation, greatly reducing manual labor and providing good performance.

[0005] The solution of the present invention to the aforementioned technical problem is:

[0006] An automatic bolt fixing mechanism for a display base plastic plate includes a fixed base plate. A middle fixed plate is fixed to the center of the top surface of the fixed base plate. Front and rear moving mechanisms extending forward and backward are fixed to the left and right sides of the top surface of the middle fixed plate. Vertical columns are fixed to the top surfaces of the moving blocks of the two front and rear moving mechanisms. An upper transverse beam is fixed to the top surface of the two vertical columns. A transversely extending linear module is fixed to the top surface of the upper transverse beam. A vertically extending second linear module is fixed to the front wall of the moving block of the linear module. A vertical support frame is fixed to the front wall of the moving block of the second linear module. A screw fastening machine head is fixed to the center of the top surface of the base plate of the vertical support frame. A screw bit at the bottom end of the screw fastening machine head extends out of the bottom surface of the base plate of the vertical support frame. A screw feeder is fixed to the top plate of the middle support frame, which is fixed to the center of the top surface of the middle fixed plate. The feeding end of the screw feeder corresponds to the screw bit at the bottom end of the screw fastening machine head.

[0007] The top surfaces on both the left and right sides of the intermediate support frame are equipped with flip-clamping devices for clamping and flipping the display panel.

[0008] The top surface of the fixed base plate on both the left and right sides of the intermediate fixed plate is fixed with a side-mounted material picking device.

[0009] The forward and backward moving mechanism includes front and rear end plates fixed to the top surface of the middle fixed plate. The same side support plate is fixed to the outer side of the two end plates. The two ends of the forward and backward extending adjustment screw are movably connected to the two end plates through bearings. A moving servo motor is fixed on one of the end plates. The moving servo motor drives the adjustment screw to rotate. A moving block is screwed onto the adjustment screw. A slider is fixed to the bottom surface of the moving block. The slider is inserted into the forward and backward extending guide rail fixed on the top surface of the middle fixed plate.

[0010] The flipping clamping device includes a lower support frame fixed to the top surface of the middle fixed plate. Support plates are fixed to the front and rear of the top surface of the top plate of the lower support frame. The middle of the two support plates is movably connected to a connecting shaft through a bearing. The adjacent ends of the two corresponding connecting shafts are fixed to the bottom surface of the same flipping plate. A central through groove is formed in the middle of the flipping plate. A flipping servo motor is fixed on the outer wall of one of the support plates. The flipping servo motor drives the corresponding connecting shaft to rotate.

[0011] Positioning sleeves are installed on the left and right front and rear parts of the top surface of the flip plate.

[0012] The side-mounted material handling device includes a side support frame. A vertically extending third linear module is fixed on the top plate of the side support frame. A horizontally extending fourth linear module is fixed on the front wall of the moving block of the third linear module. A support frame is fixed on the bottom surface of the moving block of the lower part of the fourth linear module. A horizontal extension plate is fixed on the bottom of the support frame. A lifting cylinder is fixed on the top surface of the horizontal extension plate. The bottom end of the push rod of the lifting cylinder extends out of the bottom surface of the horizontal extension plate and is fixed with a gripping plate.

[0013] A horizontal limiting plate is fixed to the bottom surface of the gripping plate. A central through groove is formed in the middle of the horizontal limiting plate. Multiple vacuum suction cups are fixed to the middle of the bottom surface of the gripping plate. The vacuum suction cups are inserted into the central through groove. The middle part of the display base to be processed is pressed against the bottom surface of all the corresponding vacuum suction cups and is adsorbed and fixed.

[0014] The bottom surfaces of the left, right, front, and rear portions of the horizontal limiting plate are all formed with limiting extension edges, and the four side walls of the display base rest against the inner side walls of the four limiting extension edges.

[0015] The left and right sides of the side support frame are each fixed with a lower placement frame on the top surface of the fixed base plate. The left and right sides of the top surface of the lower placement frame are each fixed with a positioning block at the front and rear. The top surface of the positioning block is formed with a positioning hole. The material pick-up and drop-off bucket is located above the corresponding lower placement frame. The left and right sides of the bottom surface of the bottom plate of the material pick-up and drop-off bucket are each fixed with a positioning post at the front and rear. The positioning post is inserted into the corresponding positioning hole, and its bottom surface presses against the bottom surface of the corresponding positioning hole.

[0016] The bottom plate of the picking and dispensing hopper has a central through hole formed in the middle. A connecting side plate is fixed in the middle of the bottom surface of the top plate of the lower placement frame. An electric cylinder is fixed on the connecting side plate. The top of the push rod of the electric cylinder extends out of the top surface of the top plate of the lower placement frame and is fixed with a lifting plate. The lifting plate is inserted into the central through hole of the bottom plate of the picking and dispensing hopper.

[0017] The outstanding effects of this invention are:

[0018] Compared with existing technologies, it can automatically grab monitor bases with metal bending parts, place them on the flip plate for automatic clamping, and automatically screw them on. It can automatically flip the monitor base so that screws can be automatically screwed on both the top and bottom surfaces, and can also automatically unload materials, achieving fully automatic operation, greatly reducing manual labor and providing good performance. Attached Figure Description

[0019] Figure 1 This is a partial structural schematic diagram of the present invention;

[0020] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0021] Figure 3 yes Figure 1 A magnified view of another part;

[0022] Figure 4 yes Figure 1 There are also some enlarged partial images;

[0023] Figure 5 This is a partial top view of the middle fixed plate. Detailed Implementation

[0024] For example, see below. Figures 1 to 5As shown, an automatic bolt fixing mechanism for a display base plastic plate includes a fixed base plate 10. A middle fixed plate 11 is fixed to the center of the top surface of the fixed base plate 10. Forward and backward moving mechanisms 20 extending forward and backward are fixed to the left and right sides of the top surface of the middle fixed plate 11. Vertical columns 21 are fixed to the top surfaces of the moving blocks of the two forward and backward moving mechanisms 20. An upper transverse beam 22 is fixed to the top surface of the two vertical columns 21. A transversely extending linear module 30 is fixed to the top surface of the upper transverse beam 22. A vertically extending second linear module is fixed to the front wall of the moving block of the linear module 30. 31. A vertical support frame 32 is fixed on the front wall of the moving block of the second linear module 31. A screw fastening machine head 33 (which is a known existing structure and will not be described in detail here) is fixed in the middle of the top surface of the bottom plate of the vertical support frame 32. A screw feeder 12 (which is a known existing structure and will not be described in detail here) is fixed on the top plate of the intermediate support frame fixed in the middle of the top surface of the intermediate fixed plate 11. The feeding end of the screw feeder 12 corresponds to the screw feeder bit at the bottom of the screw fastening machine head 33.

[0025] The top surfaces of both the left and right sides of the intermediate support frame are equipped with flip clamping devices 40 for clamping and flipping the display panel 100.

[0026] The top surfaces of the fixed base plates 10 on both the left and right sides of the intermediate fixed plate 11 are fixed with side-mounted material picking devices 50.

[0027] Furthermore, the forward and backward moving mechanism 20 includes front and rear end plates fixed to the top surface of the intermediate fixed plate 11. The same side support plate is fixed to the outer side of the two end plates. The two ends of the forward and backward extending adjusting screw 23 are movably connected to the two end plates through bearings. A moving servo motor 24 is fixed on one of the end plates. The moving servo motor 24 drives the adjusting screw 23 to rotate. A moving block is screwed onto the adjusting screw 23. A slider is fixed to the bottom surface of the moving block. The slider is inserted into the forward and backward extending guide rail fixed on the top surface of the intermediate fixed plate 11.

[0028] Furthermore, the flipping clamping device 40 includes a lower support frame 41 fixed to the top surface of the intermediate fixed plate 11. Support plates 42 are fixed to the front and rear parts of the top surface of the top plate of the lower support frame 41. The middle parts of the two support plates 42 are movably connected to the connecting shafts 43 through bearings. The near ends of the two corresponding connecting shafts 43 are fixed to the bottom surface of the same flipping plate 44. A central through groove 441 is formed in the middle of the flipping plate 44. A flipping servo motor 45 is fixed on the outer side wall of one of the support plates 42. The output shaft of the flipping servo motor 45 is a spline shaft, which is inserted into the spline hole of the corresponding connecting shaft 43 to drive the corresponding connecting shaft 43 to rotate.

[0029] Furthermore, positioning sleeves 46 are installed on the left and right front and rear parts of the top surface of the flip plate 44.

[0030] Furthermore, the top surface of the flip plate 44 has mounting through holes formed on the left and right front and rear parts of the top surface. A radially extending ring 442 is formed on the inner side wall of the top of the mounting through hole. The positioning sleeve 46 is inserted into the mounting through hole. A bottom radially extending edge 461 is formed on the outer side wall of the bottom end of the positioning sleeve 46. The top surface of the bottom radially extending edge 461 presses against the bottom surface of the radially extending ring 442. A lower fixing plate 47 is fixed on the bottom surface of the flip plate 44 corresponding to the mounting through hole. A compression spring 48 is inserted into the mounting through hole. The top of the compression spring 48 is pressed against the bottom surface of the bottom radially extending edge 461, and the bottom end of the compression spring 48 is pressed against the top surface of the lower fixing plate 47.

[0031] The positioning sleeve 46 has two vertical positioning pieces 49 inserted into it. The upper radial extension 491 is formed on the top outer wall of the two vertical positioning pieces 49. The outer wall of the upper radial extension 491 presses against the inner wall of the positioning sleeve 46. The middle guide block 492 is held between the two vertical positioning pieces 49. The left and right side walls of the middle guide block 492 are inclined walls. The upper parts of the two inclined walls are close to each other and the lower parts are far apart. The inclined wall of the middle guide block 492 is in close contact with the inclined inner wall of the corresponding vertical positioning piece 49. The bottom surface of the middle guide block 492 is fixed on the top surface of the lower fixing plate 47. Multiple transverse limiting rods 493 are fixed on the opposite wall surfaces of the two vertical positioning pieces 49. The transverse limiting rods 493 are inserted into the corresponding positioning holes formed on the left and right side walls of the middle guide block 492. Their outer walls are in close contact with the inner walls of the corresponding positioning holes.

[0032] Multiple stepped holes are formed on both the left and right side walls of the intermediate guide block 492. The width of the outer end hole is greater than the width of the inner end hole. The spring 494 and the push block 495 are inserted into the corresponding stepped holes and are corresponding to them. The spring 494 is located in the inner end hole of the stepped hole, and the push block 495 is inserted in the outer end hole. The inner end of the spring 494 is fixed to the inner end face of the inner end hole, and the other end is fixed to the inner end face of the push block 495. The outer end face of the push block 495 presses against the inner side wall of the corresponding vertical positioning piece 49. The lower outer wall of the vertical positioning piece 49 is a downward sloping surface with the upper end far away from the lower end and the lower end close to the upper end. Two sloping through holes are formed on the lower fixing plate 47 corresponding to the two downward sloping surfaces. A lower sleeve part 471 is fixed on the bottom surface of the lower fixing plate 47. A bottom limiting plate 472 is inserted into the lower sleeve part 471. A reset pushing cylinder 473 is fixed on the bottom surface of the bottom plate of the lower sleeve part 471. The top end of the push rod of the reset pushing cylinder 473 extends out of the top surface of the bottom plate of the lower sleeve part 471 and is fixed on the bottom surface of the bottom limiting plate 472.

[0033] A spring 474 is inserted into the push rod of the reset cylinder 473. The top of the spring 474 is attached to the top surface of the bottom plate of the lower sleeve part 471 and the top of the spring 474 is attached to the top surface of the bottom limiting plate 472. The top surface of the bottom limiting plate 472 is formed with two oblique guide parts 475. The two oblique guide parts 475 are inserted into two oblique through holes. The upper part of the two oblique guide parts 475 extends out of the top surface of the lower fixing plate 47, and its inner sidewall is in close contact with the corresponding lower oblique surface.

[0034] In the initial state, the push rod of the reset push cylinder 473 retracts, so that the bottom limit plate 472 is below, and the oblique guide part 475 does not extend out of the top of the oblique through hole.

[0035] Furthermore, the side-mounted material handling device 50 includes a side support frame 51 fixed to the top surface of the fixed base plate 10. A vertically extending third linear module 52 is fixed to the top plate of the side support frame 51. A horizontally extending fourth linear module 53 is fixed to the front wall of the moving block of the third linear module 52. A support frame 54 is fixed to the bottom surface of the moving block of the lower part of the fourth linear module 53. A horizontal extension plate 55 is fixed to the bottom of the support frame 54. A lifting cylinder 56 is fixed to the top surface of the horizontal extension plate 55. The bottom end of the push rod of the lifting cylinder 56 extends out of the bottom surface of the horizontal extension plate 55 and is fixed with a gripping plate 57.

[0036] A horizontal limiting plate 58 is fixed to the bottom surface of the gripping plate 57. A central through groove is formed in the middle of the horizontal limiting plate 58. Multiple vacuum suction cups 571 are fixed to the middle of the bottom surface of the gripping plate 57. The vacuum suction cups 571 are inserted into the central through groove. The middle part of the display base 100 to be processed is pressed against the bottom surface of all the corresponding vacuum suction cups 571 and adsorbed and fixed.

[0037] The bottom surfaces of the left, right, front and rear portions of the horizontal limiting plate 58 are all formed with limiting extension edges 581, and the four side walls of the display base 100 rest against the inner side walls of the four limiting extension edges 581.

[0038] Furthermore, vertical guide rods are fixed on the top surfaces of the left and right sides of the horizontal limiting plate 58, and the vertical guide rods are inserted into the corresponding guide through holes formed on the horizontal extension plate 55.

[0039] Furthermore, the inner wall of the limiting extension edge 581 is an oblique wall surface that extends outward and downward.

[0040] The lower placement frame 60 is fixed on the top surface of the fixed base plate 10 on both the left and right sides of the side support frame 51. The front and rear parts of the top surface of the top plate of the lower placement frame 60 are fixed with positioning blocks 61. The center of the top surface of the positioning block 61 is formed with a positioning hole. The material pick-up and drop-off bucket 70 is located above the corresponding lower placement frame 60. The front and rear parts of the left and right parts of the bottom surface of the bottom plate of the material pick-up and drop-off bucket 70 are fixed with positioning posts 71. The positioning posts 71 are inserted into the corresponding positioning holes, and their bottom surfaces press against the bottom surfaces of the corresponding positioning holes.

[0041] Furthermore, the bottom plate of the material handling hopper 70 has a central through hole formed in the middle, and a connecting side plate is fixed in the middle of the bottom surface of the top plate of the lower placement frame 60. The electric cylinder 62 is fixed on the connecting side plate, and the top end of the push rod of the electric cylinder 62 extends out of the top surface of the top plate of the lower placement frame 60 and is fixed with a lifting plate 63. The lifting plate 63 is inserted into the central through hole of the bottom plate of the material handling hopper 70.

[0042] The bottom surface of the lifting plate 63 is fixed with a lower guide rod, which is inserted into a vertical guide through hole formed on the top plate of the lower placement frame 60.

[0043] The outer, middle and inner sides of the front sidewall of the fourth linear module 53 are all fixed with proximity switches 1, and the bottom end of the proximity switches 1 corresponds to the sensing post 2 fixed on the top surface of the moving plate of the fourth linear module 53.

[0044] The gripping plate 57 corresponds to the flipping plate 44 and the two pick-and-place bins 70.

[0045] In this embodiment, all cylinders and vacuum suction cups are connected to the pneumatic system through connecting pipes and operate through the corresponding control valves of the pneumatic system to achieve the action. The electrical components of the pneumatic system and all other electrical components are electrically connected to the control host through electrical connection lines and are controlled by the control host. This is an existing conventional structure and will not be described in detail here.

[0046] In this embodiment, multiple display bases 100 with metal bending parts to be processed are first stacked and placed in an inner pick-and-place bin 70. Then, through the coordinated action of two third linear modules 52 and a fourth linear module 53, the moving block of the third linear module 52 moves to the corresponding height and does not need to be moved further. The sensing post 2 fixed on the top surface of the moving plate of the fourth linear module 53 is located below the sensing end of the proximity switch 1 in the middle. When it is sensed by the proximity switch 1, it means that it has moved into place and is above the corresponding pick-and-place bin 70. Then, the lifting cylinder 5... Pushing the push rod of cylinder 6 causes the gripping plate 57 to descend. As it descends, the topmost monitor base 100 is positioned on the inner wall of the four limiting extension edges 581 (the inner wall is inclined and has a guiding function). At the same time, the vacuum suction cup 571 presses against the top surface of the monitor base 100 to adsorb and fix it. Then, the push rod of the lifting cylinder 56 retracts, allowing the monitor base 100 to be removed. After removal, the push rod of the electric cylinder 62 at the corresponding pick-and-place hopper 70 pushes the monitor base 100 by the thickness of one monitor base 100 to facilitate the normal gripping of the monitor base 100 in subsequent operations.

[0047] Then, the moving plate of the fourth linear module 53 moves, causing the sensing end of the proximity switch 1 on the inner side to sense the sensing post 2. At this time, the monitor base 100 is directly above the corresponding flip plate 44. Then, the push rod of the lifting cylinder 56 pushes the monitor base 100 down and presses it against the top surface of the flip plate 44. During the descent, it presses down the corresponding positioning sleeve 46. At this time, the tops of the two vertical positioning pieces 48 extend from the positioning sleeve 46 and are inserted into the corresponding through holes of the monitor base 100. At the same time, the elastic return of the spring 494 pushes the push block 495 outward, moving the two vertical positioning pieces... The plate 48 is pushed outward until the top of the two vertical positioning plates 48 extends out of the top of the corresponding through hole of the display base 100 and is inserted into the corresponding through hole of the horizontal limiting plate 58, until the upper radial extension 491 is above the edge of the corresponding through hole of the display base 100. At this time, the display base 100 is clamped between the top surface of all the corresponding positioning sleeves 46 and the bottom surface of the upper radial extension 491 to achieve clamping and fixing. Then, the vacuum suction cup 571 stops running, the push rod of the lifting cylinder 56 retracts, and the fourth linear module 53 runs, so that the sensing column 2 is below the sensing end of the proximity switch 1 in the middle.

[0048] Then, through the coordinated operation of two forward and backward moving mechanisms 20, linear module 30, and vertically extending second linear module 31, the screwdriver bit of the screw fastening machine main head 33 can be taken from the screw feeder 12 and screwed onto the corresponding position on the top surface of the display base 100.

[0049] After the top surface is machined, the display base 100 is rotated 180° by the operation of the flip servo motor 45. Then, the screws corresponding to the display base 100 in the center through slot 441 are tightened to complete the installation. Then, the flip servo motor 45 is run to reset it. Then, all the push rods of the reset push cylinder 473 are pushed to extend the upper part of the two inclined guide parts 475 out of the top surface of the lower fixing plate 47 and move upward, so that the inner side wall is pressed against the corresponding lower inclined surface, so that the two vertical positioning pieces 48 are brought together and reset. Then, the moving plate of the fourth linear module 53 is operated to move the gripping plate 57 to the corresponding position and suck it up. After the fixed removal, the moving plate of the four linear module 53 moves, so that the proximity switch 1 on the outer side of the sensing column 2 is sensed, indicating that it is above the outer picking and placing barrel 70. The vacuum suction cup 571 closes, and the processed display base 100 falls into the corresponding picking and placing barrel 70 and rests on the top surface of the corresponding lifting plate 63. At this time, the lifting plate 63 is at the top. After placement, the push rod of the corresponding electric cylinder 62 is retracted by a distance equal to the thickness of the display base 100. Then, a new display base 100 is picked up for subsequent processing. The processing effect is good, the efficiency is high, and the operation is fully automated.

[0050] Finally, the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A kind of automatic bolt fixing mechanism of display base plastic plate, including fixed bottom plate (10), it is characterized in that: The middle of the top surface of the fixed bottom plate (10) is fixed with an intermediate fixed plate (11), the left and right parts of the top surface of the intermediate fixed plate (11) are fixed with front and back moving mechanisms (20) extending front and back, the top surface of the moving block of the two front and back moving mechanisms (20) is fixed with vertical columns (21), an upper transverse beam (22) is fixed on the top surface of the two vertical columns (21), the top surface of the upper transverse beam (22) is fixed with a linear module (30) extending horizontally, the front wall surface of the moving block of the linear module (30) is fixed with a second linear module (31) extending vertically, the front wall surface of the moving block of the second linear module (31) is fixed with a vertical support frame (32), the top surface of the bottom plate of the vertical support frame (32) is fixed with a lock screw machine head (33) in the middle, the bottom end of the lock screw machine head (33) is provided with a bit extending out of the bottom surface of the bottom plate of the vertical support frame (32), a screw feeder (12) is fixed on the top plate of the middle support frame fixed on the middle of the top surface of the intermediate fixed plate (11), the material taking end of the screw feeder (12) corresponds to the bit of the bottom end of the lock screw machine head (33); The top surface of the left and right sides of the middle support frame is provided with a turnover clamping device (40) for clamping and overturning a display panel body (100); The top surface of the fixed bottom plate (10) at the left and right sides of the intermediate fixed plate (11) is fixed with a side material taking device (50).

2. The automatic bolt fixing mechanism for the plastic plate of the display pedestal according to claim 1, characterized in that: The front and back moving mechanism (20) comprises end plates fixed on the top surface of the front and back of the intermediate fixed plate (11), the same side support plate is fixed on the outer side of the two end plates, the two ends of the front and back extending adjusting screw rod (23) are movably connected to the two end plates through bearings, the moving servo motor (24) is fixed on one of the end plates, the moving servo motor (24) drives the adjusting screw rod (23) to rotate, the moving block is screwed on the adjusting screw rod (23), the bottom surface of the moving block is fixed with a sliding block which is inserted into the front and back extending guide rail fixed on the top surface of the intermediate fixed plate (11).

3. The automatic bolt fixing mechanism of a display stand plastic plate according to claim 1, characterized in that: The turnover clamping device (40) comprises a lower support frame (41) fixed on the top surface of the intermediate fixed plate (11), the top surface of the top plate of the lower support frame (41) is fixed with support plates (42) at the front and back, the middle of the two support plates (42) is movably connected with a connecting shaft (43) through a bearing, the proximal end of the two corresponding connecting shafts (43) is fixed on the bottom surface of the same turnover plate (44), the middle of the turnover plate (44) is formed with a center through groove (441), the outer side wall of one of the support plates (42) is fixed with a turnover servo motor (45), the turnover servo motor (45) drives the corresponding connecting shaft (43) to rotate.

4. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 3, characterized in that: The left and right parts of the top surface of the turnover plate (44) are provided with positioning sleeves (46) at the front and back.

5. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 1, characterized in that: The side placing device (50) comprises a side support frame (51) fixed on the top surface of the fixed base plate (10), a third linear module (52) vertically extending is fixed on the top plate of the side support frame (51), a fourth linear module (53) transversely extending is fixed on the front wall surface of the moving block of the third linear module (52), a support frame (54) is fixed on the bottom surface of the moving block at the lower part of the fourth linear module (53), a horizontally extending plate (55) is fixed on the bottom of the support frame (54), a lifting cylinder (56) is fixed on the top surface of the horizontally extending plate (55), the bottom end of the push rod of the lifting cylinder (56) extends out of the bottom surface of the horizontally extending plate (55) and is fixed with a grabbing plate (57).

6. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 5, characterized in that: The bottom surface of the grabbing plate (57) is fixed with a horizontal limiting plate (58), a central through groove is formed in the middle part of the horizontal limiting plate (58), a plurality of vacuum cups (571) are fixed on the bottom surface of the middle part of the grabbing plate (57), the vacuum cups (571) are inserted into the central through groove, and the middle part of the display base (100) to be processed is pressed against the bottom surface of all corresponding vacuum cups (571) and is adsorbed and fixed. The bottom surface of the left part, the right part, the front part and the rear part of the horizontal limiting plate (58) is formed with a limiting extension edge (581), and the four side walls of the display base (100) are arranged on the inner side walls of the four limiting extension edges (581).

7. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 6, characterized in that: The top surfaces of the left part and the right part of the horizontal limiting plate (58) are fixed with vertical guide rods which are inserted into corresponding guide through holes formed in the horizontally extending plate (55). The inner side walls of the limiting extension edges (581) are outwardly and downwardly inclined wall surfaces.

8. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 5, characterized in that: The top surface of the top plate of the lower placing frame (60) is fixed with positioning blocks (61) on the front part and the rear part of the left and right sides, and a positioning hole is formed in the top surface of the positioning block (61).

9. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 8, characterized in that: The bottom surface of the bottom plate of the taking and placing barrel (70) is fixed with positioning columns (71) on the front part and the rear part of the left part and the right part, the positioning columns (71) are inserted into the corresponding positioning holes, and the bottom surface of the positioning columns (71) is pressed against the bottom surface of the corresponding positioning hole.

10. The automatic bolt fixing mechanism of a plastic plate of a display stand according to claim 9, characterized in that: The bottom surface of the bottom plate of the taking and placing barrel (70) is fixed with a connecting side plate in the middle part, an electric cylinder (62) is fixed on the connecting side plate, the top end of the push rod of the electric cylinder (62) extends out of the top surface of the top plate of the lower placing frame (60) and is fixed with a lifting plate (63), and the lifting plate (63) is inserted into the central through hole of the bottom plate of the taking and placing barrel (70). The bottom surface of the lifting plate (63) is fixed with a lower guide rod which is inserted into a vertical guide through hole formed in the top plate of the lower placing frame (60).

Images