An automatic tightening device for an elevator head door lock

Abstract

The present application relates to the elevator technical field, especially a kind of elevator upper door head door lock automatic tightening equipment. Including rack platform and be set on the rack platform upper door head support structure, upper door head positioning mechanism, door lock transplanting mechanism, door lock positioning mechanism, tightening machine moving mechanism and tightening machine, wherein upper door head positioning mechanism is used to position the upper door head placed on upper door head support structure, door lock transplanting mechanism and door lock positioning mechanism are set on the side of upper door head support structure, tightening machine moving mechanism is set on the other side of upper door head support structure, and tightening machine is set on tightening machine moving mechanism. The present application realizes the automatic tightening of door lock on upper door head, avoids the situation of adjusting assembly again, and the installation precision of door lock is high, which also avoids the bad collision and friction between other components, prolongs the service life and reduces the failure rate.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to an automatic tightening device for an elevator upper sill door head lock. Background Art

[0002] Box elevators are now widely used in multi-story and high-rise buildings, making it convenient for people to travel between different floors. In existing elevator structures, the upper sill door head plays the role of opening and closing the elevator door under the action of the door machine, and the upper sill door head door lock is the component that ensures the elevator door is closed or opened. The door lock is fixed to the upper sill door head by two bolts through a long hole. The closing and opening of the elevator door are controlled by hooking and releasing the upper sill door head hanging plate. At present, the assembly of elevator upper sill door locks is mainly manual. Manual assembly of the upper sill door lock requires manually tightening two bolts, which has low assembly efficiency, low positioning accuracy, poor consistency, and sometimes requires re-adjustment of the assembly at a later time. Manual assembly is prone to large installation errors, which affect the service life and safety performance of the upper sill door head. Summary of the Invention

[0003] In order to realize the automatic assembly of the elevator upper sill door head and door lock, the present invention provides an elevator upper sill door head and door lock automatic tightening device, which realizes the fixed connection between the upper sill door head and the door lock by accurately positioning the upper sill door head, the door lock and the tightening machine.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An automatic tightening device for an elevator upper sill door head and door lock, comprising a frame platform and an upper sill door head supporting structure arranged on the frame platform, an upper sill door head positioning mechanism, a door lock transferring mechanism, a door lock positioning mechanism, a tightening machine transferring mechanism and a tightening machine, wherein the upper sill door head positioning mechanism is used to position the upper sill door head placed on the upper sill door head supporting structure, the door lock transferring mechanism and the door lock positioning mechanism are arranged on one side of the upper sill door head supporting structure, the tightening machine transferring mechanism is arranged on the other side of the upper sill door head supporting structure, and the tightening machine is arranged on the tightening machine transferring mechanism.

[0006] The upper sill door head positioning mechanism includes an upper sill door head coarse positioning mechanism and an upper sill door head fine positioning mechanism, wherein the upper sill door head coarse positioning mechanism is arranged on one side of the upper sill door head supporting structure, and is used to push the upper sill door head laterally for coarse positioning; the upper sill door head fine positioning mechanism is arranged below the upper sill door head supporting structure, and is used for fine positioning of the upper sill door head.

[0007] The upper door head coarse positioning mechanism includes two upper door head coarse positioning cylinders, which are horizontally arranged on both sides of the door lock transplanting mechanism. The upper door head coarse positioning cylinders are used to push the upper door head laterally.

[0008] The upper sill door head precision positioning mechanism includes an upper sill door head positioning support structure, an upper sill door head positioning guide shaft pin, an upper sill door head positioning bushing, an upper sill door head precision positioning cylinder and an upper sill door head positioning cylinder support structure, wherein the upper sill door head positioning support structure and the upper sill door head positioning cylinder support structure are respectively arranged on the upper and lower sides of the frame platform, and the upper sill door head positioning support structure is used to auxiliary support the upper sill door head; the upper sill door head precision positioning cylinder is arranged on the upper sill door head positioning cylinder support structure, and the output end is connected to two upper sill door head positioning guide shaft pins, and the two upper sill door head positioning guide shaft pins are slidably connected to two upper sill door head positioning bushings provided on the frame platform.

[0009] The frame platform is also provided with two upper door head clamping cylinders for pressing the upper door head, and the two upper door head clamping cylinders are respectively located on both sides of the door lock transplanting mechanism.

[0010] The door lock positioning mechanism includes a door lock positioning cylinder, a door lock positioning support structure and a door lock positioning guide shaft pin, wherein the door lock positioning support structure is arranged on the frame platform, the door lock positioning cylinder is arranged at the bottom of the door lock positioning support structure, and the output end is connected to the door lock positioning guide shaft pin, and the door lock positioning guide shaft pin is slidably connected to the door lock positioning bushing provided on the top of the door lock positioning support structure.

[0011] The frame platform is symmetrically provided with two sections of linear guide rails located on both sides of the upper door head support structure, and the door lock transferring mechanism and the tightening machine transferring mechanism are respectively arranged on the two sections of linear guide rails.

[0012] The door lock transfer mechanism includes a door lock transfer mechanism drive cylinder, a door lock transfer support structure, a door lock lifting guide shaft, a door lock lifting drive cylinder, a door lock grabbing cylinder and a door lock limit block, wherein the lower end of the door lock transfer support structure is slidably connected to the linear guide rail on one side of the upper door head support structure, the door lock transfer mechanism drive cylinder is arranged on the frame platform, and the output end is connected to the door lock transfer support structure;

[0013] The door lock lifting drive cylinder is arranged at the top of the door lock transfer support structure and the output end is connected to the lifting plate. The lifting plate slides with the door lock lifting bushing arranged at the top of the door lock transfer support structure through the door lock lifting guide shaft. The door lock grabbing cylinder and the door lock limit block are arranged at the bottom of the lifting plate. The output end of the door lock grabbing cylinder is provided with a grabbing rod. The door lock grabbing cylinder contracts to clamp the door lock between the grabbing rod and the door lock limit block.

[0014] The tightening machine transfer mechanism includes a tightening machine transfer mechanism driving cylinder and a tightening machine transfer support structure, wherein the lower end of the tightening machine transfer support structure is slidably connected to the linear guide rail on the other side of the upper sill door head support structure, and the tightening machine is arranged on the tightening machine transfer support structure; the tightening machine transfer mechanism driving cylinder is arranged on the frame platform, and the output end is connected to the tightening machine transfer support structure.

[0015] The frame platform is provided with a bolt receiving platform located on one side of the door lock transplanting mechanism;

[0016] The rack platform includes a rack and a mounting platform arranged on the top of the rack.

[0017] The advantages and beneficial effects of the present invention are as follows: the present invention provides an automatic tightening device for the door lock of the elevator upper door head, which enables the positioning accuracy of the door lock on the upper door head to be 0.5 mm, realizes the automatic tightening of the door lock on the upper door head, and avoids the need for readjustment and assembly; at the same time, the door lock has high installation accuracy, and also avoids adverse collisions and frictions with other components, thereby extending the service life and reducing the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an automatic tightening device for an elevator upper door head lock according to the present invention;

[0019] Figure 2 This is a second structural diagram of an automatic tightening device for an elevator upper door head lock according to the present invention;

[0020] Figure 3 Schematic diagram of the structure of the door lock transplanting mechanism of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the door locking mechanism of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the door lock of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the upper door head positioning mechanism of the present invention;

[0024] Figure 1: Frame, 2: Mounting platform, 3: Upper door head support structure, 4: Upper door head clamping cylinder, 5: Upper door head coarse positioning cylinder, 6: Door lock transfer mechanism, 7: Door lock positioning mechanism, 8: Tightening machine transfer mechanism, 9: Tightening machine, 10: Bolt receiving platform, 11: Tightening machine transfer mechanism drive cylinder, 12: Upper door head, 13: Upper door head fine positioning mechanism, 14: Door lock transfer mechanism drive cylinder, 15: Door lock transfer support structure, 16: Door lock lifting bushing , 17. Door lock lifting guide shaft, 18. Door lock lifting drive cylinder, 19. Door lock grabbing cylinder, 20. Door lock limit block, 21. Door lock, 22. Door lock positioning bushing, 23. Door lock positioning cylinder, 24. Door lock positioning support structure, 25. Door lock positioning guide shaft pin, 26. Upper sill door head positioning support structure, 27. Upper sill door head positioning guide shaft pin, 28. Upper sill door head positioning bushing, 29. Upper sill door head precision positioning cylinder, 30. Upper sill door head positioning cylinder support structure. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-2 As shown, the present invention provides an automatic tightening device for an elevator upper sill door head lock, comprising a frame platform and an upper sill door head supporting structure 3, an upper sill door head positioning mechanism, a door lock transferring mechanism 6, a door lock positioning mechanism 7, a tightening machine transferring mechanism 8 and a tightening machine 9, wherein the upper sill door head supporting structure 3 is used to support the upper sill door head 12, the upper sill door head positioning mechanism is used to position the upper sill door head 12 placed on the upper sill door head supporting structure 3, the door lock transferring mechanism 6 and the door lock positioning mechanism 7 are arranged on one side of the upper sill door head supporting structure 3, the door lock positioning mechanism 7 is used to position the door lock 21, and the door lock transferring mechanism 6 is used to realize the transfer of the door lock 21; the tightening machine transferring mechanism 8 is arranged on the other side of the upper sill door head supporting structure 3, and the tightening machine 9 is arranged on the tightening machine transferring mechanism 8.

[0027] In an embodiment of the present invention, the rack platform includes a rack 1 and a mounting platform 2 arranged on the top of the rack 1. The mounting platform 2 is provided with a bolt receiving platform 10 located on one side of the door lock transplanting mechanism 6. The bolt receiving platform 10 is used to provide the bolts required for the tightening action.

[0028] In an embodiment of the present invention, the upper sill door head positioning mechanism includes an upper sill door head coarse positioning mechanism and an upper sill door head fine positioning mechanism 13, wherein the upper sill door head coarse positioning mechanism is arranged on one side of the upper sill door head supporting structure 3, and is used to push the upper sill door head 12 laterally for coarse positioning; the upper sill door head fine positioning mechanism 13 is arranged below the upper sill door head supporting structure 3, and is used for fine positioning of the upper sill door head 12.

[0029] Specifically, the upper sill door head coarse positioning mechanism includes two upper sill door head coarse positioning cylinders 5, which are horizontally arranged on both sides of the door lock transplanting mechanism 6, and the upper sill door head coarse positioning cylinders 5 are used to push the upper sill door head 12 laterally.

[0030] like Figure 6 As shown, in an embodiment of the present invention, the upper sill door head precision positioning mechanism 13 includes an upper sill door head positioning support structure 26, an upper sill door head positioning guide shaft pin 27, an upper sill door head positioning bushing 28, an upper sill door head precision positioning cylinder 29 and an upper sill door head positioning cylinder support structure 30, wherein the upper sill door head positioning support structure 26 and the upper sill door head positioning cylinder support structure 30 are respectively arranged on the upper and lower sides of the mounting platform 2, and the upper sill door head positioning support structure 26 is used to auxiliary support the upper sill door head 12; the upper sill door head precision positioning cylinder 29 is arranged on the upper sill door head positioning cylinder support structure 30, and the output end is connected to the two upper sill door head positioning guide shaft pins 27, and the two upper sill door head positioning guide shaft pins 27 are slidably connected to the two upper sill door head positioning bushings 28 provided on the frame platform. The upper sill door head fine positioning cylinder 29 drives the movement of the upper sill door head positioning guide shaft pin 27. When the upper sill door head positioning cylinder 29 extends, the upper sill door head positioning guide shaft pin 27 rises; when the upper sill door head positioning cylinder 29 retracts, the upper sill door head positioning guide shaft pin 27 falls.

[0031] Furthermore, two upper sill door head clamping cylinders 4 for pressing the upper sill door head 12 are provided on the mounting platform 2. The two upper sill door head clamping cylinders 4 are respectively located on both sides of the door lock transfer mechanism 6. After the upper sill door head 12 is roughly and finely positioned by the upper sill door head positioning mechanism, the upper sill door head 12 is pressed and fixed by the upper sill door head clamping cylinders 4 to achieve accurate positioning of the upper sill door head 12.

[0032] like Figures 4-5 As shown, in this embodiment of the present invention, the door lock positioning mechanism 7 includes a door lock positioning cylinder 23, a door lock positioning support structure 24, and a door lock positioning guide pin 25. The door lock positioning support structure 24 is disposed on the mounting platform 2 and is used to support the door lock 21. The door lock positioning cylinder 23 is disposed at the bottom of the door lock positioning support structure 24, and its output end is connected to the door lock positioning guide pin 25. The door lock positioning guide pin 25 is slidably connected to the door lock positioning bushing 22 provided at the top of the door lock positioning support structure 24. The door lock positioning guide pin 25 is driven by the door lock positioning cylinder 23 to position the door lock 21. When the door lock positioning cylinder 23 extends, the door lock positioning guide pin 25 rises to position the door lock 21; when the door lock positioning cylinder 23 retracts, the door lock positioning guide pin 25 descends.

[0033] Furthermore, two sections of linear guide rails are symmetrically provided on the installation platform 2 and are located on both sides of the upper door head support structure 3. The door lock transferring mechanism 6 and the tightening machine transferring mechanism 8 are respectively arranged on the two sections of linear guide rails.

[0034] like Figure 3 As shown, in an embodiment of the present invention, the door lock transferring mechanism 6 includes a door lock transferring mechanism driving cylinder 14, a door lock transferring support structure 15, a door lock lifting guide shaft 17, a door lock lifting driving cylinder 18, a door lock grabbing cylinder 19 and a door lock limit block 20, wherein the lower end of the door lock transferring support structure 15 is slidingly connected to the linear guide rail on one side of the upper door head support structure 3, the door lock transferring mechanism driving cylinder 14 is arranged on the mounting platform 2, and the output end is connected to the door lock transferring support structure 15, and the movement of the door lock transferring support structure 15 is driven by the extension and contraction of the door lock transferring mechanism driving cylinder 14 to realize the transfer of the door lock 21. The door lock lifting drive cylinder 18 is arranged at the top of the door lock transfer support structure 15 and the output end is connected to the lifting plate. The lifting plate slides with the door lock lifting bushing 16 arranged at the top of the door lock transfer support structure 15 through the door lock lifting guide shaft 17. The door lock grabbing cylinder 19 and the door lock limit block 20 are arranged at the bottom of the lifting plate. The output end of the door lock grabbing cylinder 19 is provided with a grabbing rod. The door lock grabbing cylinder 19 contracts to clamp the door lock 21 between the grabbing rod and the door lock limit block 20.

[0035] When the door lock grabbing cylinder 19 clamps the door lock 21 and the door lock lifting drive cylinder 18 extends, the door lock grabbing cylinder 19, the door lock limit block 20 and the door lock 21 are driven to descend together; when the door lock grabbing cylinder 19 clamps the door lock 21 and the door lock lifting drive cylinder 18 contracts, the door lock 21 is driven to rise.

[0036] The tightening machine transferring mechanism 8 includes a tightening machine transferring mechanism driving cylinder 11 and a tightening machine transferring support structure, wherein the lower end of the tightening machine transferring support structure is slidingly connected to the linear guide rail on the other side of the upper sill door head support structure 3, and the tightening machine 9 is arranged on the tightening machine transferring support structure; the tightening machine transferring mechanism driving cylinder 11 is arranged on the mounting platform 2, and the output end is connected to the tightening machine transferring support structure, and the tightening machine 9 is transferred by the extension and retraction of the tightening machine transferring mechanism driving cylinder 11.

[0037] Before use, each mechanism returns to its initial position. The upper door head clamping cylinder 4 opens, and the upper door head rough positioning cylinder 5 retracts. The door lock transfer mechanism driving cylinder 14 extends, so that the door lock transfer mechanism 6 is above the door lock positioning mechanism 7. The tightening machine transfer mechanism driving cylinder 11 extends, so that the tightening machine transfer mechanism 8 is above the bolt receiving platform 10. The door lock lifting drive cylinder 18 retracts, the door lock grabbing cylinder 19 opens, and the door lock transfer mechanism 6 is in a state of waiting to grab the door lock. The door lock positioning cylinder 23 retracts, and the door lock 21 has been placed on the door lock positioning mechanism 7 and is in a state of waiting to be positioned. The upper door head fine positioning cylinder 29 retracts, and the upper door head 12 is placed on the upper door head support structure 3 and is in a state of waiting to be positioned.

[0038] After the assembly begins, the upper sill door head coarse positioning cylinder 5 extends to push the upper sill door head 12 onto the limit block of the upper sill door head support structure 3 to complete the initial positioning of the upper sill door head 12. After the upper sill door head 12 is initially positioned, the upper sill door head fine positioning mechanism 13 is activated. The upper sill door head fine positioning cylinder 29 extends to drive the upper sill door head positioning guide shaft pin 27 to move upward. The upper sill door head positioning guide shaft pin 27 has a positioning pin at the top, and the positioning pin passes through the threaded hole on the upper sill door head 12 for precise positioning. After the upper sill door head 12 is precisely positioned, the upper sill door head clamping cylinder 4 is activated to clamp the upper sill door head 12 to the upper sill door head support structure 3. At the same time as the upper sill door head 12 is precisely positioned, the door lock 21 is also precisely positioned on the door lock positioning mechanism 7. First, the door lock 21 is mounted on the door lock positioning bushing 22 of the door lock positioning mechanism 7. The door lock positioning cylinder 23 is actuated and extended, driving the door lock positioning guide pin 25 upward through the door lock positioning bushing 22. The door lock positioning guide pin 25 has a locating pin at its top, which passes through the door lock 21 to precisely position the door lock 21. Simultaneously, the tightening machine transfer mechanism 8 supports the tightening machine 9 to pick up the bolts directly above the bolt receiving platform 10. At this point, the upper door head 12 and the door lock 21 are precisely positioned, and the tightening machine 9 has already picked up the bolts. The door lock transfer mechanism 6 then activates, and the door lock lift drive cylinder 18 extends, driving the door lock lift guide shaft 17. The door lock grabbing cylinder 19 and the door lock stop block 20 move downward. After the door lock lift drive cylinder 18 is fully extended, the door lock grabbing cylinder 19 actuates to clamp the door lock 21 onto the door lock stop block 20. The door lock transfer mechanism drives the cylinder 14 to move, extending the door lock transfer mechanism 6 that grabbed the door lock 21 in the previous step to the top of the upper door head 12. Then, the door lock lifting drive cylinder 18 moves and extends to press the grabbed door lock 21 onto the upper door head 12, so that the through hole on the door lock 21 is aligned with the threaded hole on the upper door head 12. Subsequently, the tightening machine transfer mechanism drives the cylinder 11 to move the tightening machine 9 after sucking the bolt to the top of the alignment hole. The tightening machine 9 enters the tightening procedure, moves vertically downward, and tightens the bolt, tightening the door lock 21 to the upper door head 12 with the bolt, and then lifts it back to its original position. The tightening machine transfer mechanism drives the cylinder 11 to move the tightening machine transfer mechanism 8 back to the top of the bolt receiving platform 10, waiting for the next bolt to be sucked. The door lock grabbing cylinder 19 then opens, releasing the clamp on the door lock 21. The door lock lifting drive cylinder 18 retracts, pushing the door lock lifting guide shaft 17 upward, raising the door lock grabbing cylinder 19 and the door lock stopper 20. Once raised into position, the door lock transfer mechanism drive cylinder 14 extends, and the door lock transfer mechanism 6 moves back to directly above the door lock positioning mechanism 7, ready to grab the next door lock 21. The upper sill door head clamping cylinder 4 then opens, releasing the clamp on the upper sill door head 12. The door lock 21 is now securely fastened to the upper sill door head 12, completing the entire process and returning all mechanisms to their initial positions.

[0039] In the embodiment of the present invention, the tightening machine 9 utilizes an existing, mature product. This invention achieves a positioning accuracy of 0.5 mm on the door sill, enabling automatic tightening of the door lock on the door sill, eliminating the need for re-adjustment and assembly. Furthermore, the door lock achieves high installation precision and avoids undesirable collisions and friction with other components, thereby extending its service life and reducing the failure rate.

[0040] The automatic assembly of the present invention has the characteristics of high efficiency and accuracy, improves the safety performance and service life of the upper sill door head, and will gradually replace manual assembly.

[0041] The above description is only an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the scope of protection of the present invention.

Claims

1. An automatic tightening device for elevator upper door head lock, characterized in that: The invention comprises a frame platform and an upper door head support structure (3) arranged on the frame platform, an upper door head positioning mechanism, a door lock transferring mechanism (6), a door lock positioning mechanism (7), a tightening machine transferring mechanism (8) and a tightening machine (9), wherein the upper door head positioning mechanism is used to position the upper door head (12) placed on the upper door head support structure (3), the door lock transferring mechanism (6) and the door lock positioning mechanism (7) are arranged on one side of the upper door head support structure (3), the tightening machine transferring mechanism (8) is arranged on the other side of the upper door head support structure (3), and the tightening machine (9) is arranged on the tightening machine transferring mechanism (8); The frame platform is further provided with two upper door head clamping cylinders (4) for pressing the upper door head (12), and the two upper door head clamping cylinders (4) are respectively located on both sides of the door lock transplanting mechanism (6); The frame platform is symmetrically provided with two sections of linear guide rails located on both sides of the upper door head support structure (3); the door lock transfer mechanism (6) and the tightening machine transfer mechanism (8) are respectively arranged on the two sections of linear guide rails; The door lock transfer mechanism (6) comprises a door lock transfer mechanism driving cylinder (14), a door lock transfer support structure (15), a door lock lifting guide shaft (17), a door lock lifting drive cylinder (18), a door lock grabbing cylinder (19) and a door lock limit block (20), wherein the lower end of the door lock transfer support structure (15) is slidably connected to a linear guide rail on one side of the upper door head support structure (3), the door lock transfer mechanism driving cylinder (14) is arranged on the frame platform, and the output end is connected to the door lock transfer support structure (15); The door lock lifting drive cylinder (18) is arranged at the top of the door lock transfer support structure (15) and the output end is connected to the lifting plate. The lifting plate is slidably matched with the door lock lifting bushing (16) arranged at the top of the door lock transfer support structure (15) through the door lock lifting guide shaft (17). The door lock grabbing cylinder (19) and the door lock limit block (20) are arranged at the bottom of the lifting plate. The output end of the door lock grabbing cylinder (19) is provided with a grabbing rod. The door lock grabbing cylinder (19) contracts to clamp the door lock (21) between the grabbing rod and the door lock limit block (20).

2. The automatic tightening device for elevator upper door head lock according to claim 1 is characterized in that: The upper sill door head positioning mechanism comprises an upper sill door head coarse positioning mechanism and an upper sill door head fine positioning mechanism (13), wherein the upper sill door head coarse positioning mechanism is arranged on one side of the upper sill door head support structure (3) and is used to push the upper sill door head (12) laterally for coarse positioning; and the upper sill door head fine positioning mechanism (13) is arranged below the upper sill door head support structure (3) and is used for fine positioning of the upper sill door head (12).

3. The automatic tightening device for elevator upper door head lock according to claim 2 is characterized in that: The upper door head coarse positioning mechanism comprises two upper door head coarse positioning cylinders (5), which are horizontally arranged on both sides of the door lock transfer mechanism (6), and the upper door head coarse positioning cylinders (5) are used to push the upper door head (12) laterally.

4. The automatic tightening device for elevator upper door head lock according to claim 2 is characterized in that: The upper sill door head precision positioning mechanism (13) comprises an upper sill door head positioning support structure (26), an upper sill door head positioning guide shaft pin (27), an upper sill door head positioning bushing (28), an upper sill door head precision positioning cylinder (29) and an upper sill door head positioning cylinder support structure (30), wherein the upper sill door head positioning support structure (26) and the upper sill door head positioning cylinder support structure (30) are respectively arranged on the upper and lower sides of the frame platform, and the upper sill door head positioning support structure (26) is used for auxiliary support of the upper sill door head (12); the upper sill door head precision positioning cylinder (29) is arranged on the upper sill door head positioning cylinder support structure (30), and the output end is connected to two upper sill door head positioning guide shaft pins (27), and the two upper sill door head positioning guide shaft pins (27) are slidably connected to two upper sill door head positioning bushings (28) provided on the frame platform.

5. The automatic tightening device for elevator upper door head lock according to claim 1 is characterized in that: The door lock positioning mechanism (7) comprises a door lock positioning cylinder (23), a door lock positioning support structure (24) and a door lock positioning guide shaft pin (25), wherein the door lock positioning support structure (24) is arranged on the frame platform, the door lock positioning cylinder (23) is arranged at the bottom of the door lock positioning support structure (24), and the output end is connected to the door lock positioning guide shaft pin (25), and the door lock positioning guide shaft pin (25) is slidably connected to the door lock positioning bushing (22) provided on the top of the door lock positioning support structure (24).

6. The automatic tightening device for elevator upper door head lock according to claim 1 is characterized in that: The tightening machine transfer mechanism (8) comprises a tightening machine transfer mechanism driving cylinder (11) and a tightening machine transfer support structure, wherein the lower end of the tightening machine transfer support structure is slidably connected to the linear guide rail on the other side of the upper sill door head support structure (3), and the tightening machine (9) is arranged on the tightening machine transfer support structure; the tightening machine transfer mechanism driving cylinder (11) is arranged on the frame platform, and the output end is connected to the tightening machine transfer support structure.

7. The automatic tightening device for elevator upper door head lock according to claim 1 is characterized in that: The frame platform is provided with a bolt receiving platform (10) located on one side of the door lock transplanting mechanism (6); The rack platform comprises a rack (1) and a mounting platform (2) arranged on the top of the rack (1).

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