A membrane disk handling device

Abstract

The present invention discloses a membrane disc handling device, which includes a machine base, a turntable, a handling mechanism and a top plate. The machine base has a handling station and a conveying station arranged at intervals in the left-right direction. The turntable is used for sequentially placing a plurality of membrane discs along its circumferential direction. The turntable is rotatably mounted on the machine base along the vertical axis to drive the plurality of membrane discs to reach the handling station successively. The handling mechanism is movably mounted on the machine base in the left-right direction. The handling mechanism is used for transferring the membrane disc at the handling station to the conveying station. The top plate is correspondingly mounted on the machine base in a vertically telescopic manner at the conveying station. The top plate is used for sequentially stacking and placing the membrane discs transferred by the handling mechanism from bottom to top, so that the top plate or the membrane disc at the uppermost position is at the same height as the conveying station. During the handling process of the handling mechanism, the top plate continuously adjusts its height to make the top plate itself or the highest membrane disc on the top plate at the same height as the handling station, so as to simplify the action of the handling mechanism as much as possible during each handling.

Description

Technical Field

[0001] The present invention relates to the technical field of mask processing, and particularly relates to a membrane disk handling device. Background Art

[0002] In an automatic mask filling line, after the membrane disks are filled by a filling machine, they need to be transported to workers' hands for loading. If the membrane disks are transported sequentially one by one, not only is the efficiency low, but also a large amount of manpower and material resources are wasted. Therefore, the existing handling method generally is to concentrate multiple membrane disks in one place and then send them to the workers' hands for loading. Since the height changes when the membrane disks are stacked, the handling mechanism has cumbersome movements during handling and needs to move in multiple directions, and the efficiency improvement is not obvious. Summary of the Invention

[0003] The main object of the present invention is to propose a membrane disk handling device, aiming to solve the problem that the efficiency improvement of the existing handling method is not obvious.

[0004] To achieve the above object, the present invention proposes a membrane disk handling device, including:

[0005] A machine base having a handling station and a conveying station arranged at intervals in the left-right direction;

[0006] A turntable for sequentially placing multiple membrane disks along its circumference, the turntable being rotatably mounted on the machine base along the up-down axis to drive the multiple membrane disks to reach the handling station successively;

[0007] A handling mechanism movably mounted on the machine base in the left-right direction, the handling mechanism being used to transfer the membrane disk at the handling station to the conveying station; and,

[0008] A top plate telescopically mounted on the machine base in the up-down direction corresponding to the conveying station, the top plate being used for the membrane disks transferred by the handling mechanism to be stacked and placed thereon from bottom to top, so that the top plate or the membrane disk at the uppermost position is at the same height as the conveying station.

[0009] Optionally, the membrane disk handling device further includes a conveying track, the conveying track is arranged at the lower left of the turntable, and includes two conveyor belts extending in the left-right direction and arranged side by side in the front-rear direction, the top plate is arranged between the two conveyor belts for the membrane disks to be stacked and placed thereon from bottom to top.

[0010] Optionally, the membrane disk handling device further includes a top plate mechanism for driving the top plate to move in the up-down direction, the top plate mechanism includes:

[0011] A bracket extending in the up-down direction, the bracket being connected to the lower end surface of the top plate to support the top plate; and,

[0012] A top plate driving motor is used to drive the bracket to move up and down.

[0013] Optionally, a plurality of trays are provided on the turntable. The plurality of trays are uniformly arranged on the turntable along the circumferential direction of the turntable from the handling station to correspondingly carry the plurality of membrane discs.

[0014] The membrane disc handling device further includes a turntable driving device to drive the turntable to rotate about the vertical axis and stop at the handling station.

[0015] Optionally, the handling mechanism includes a manipulator for clamping the membrane disc. The manipulator has a moving stroke in the vertical direction and the left - right direction.

[0016] The handling mechanism further includes a left - right translation mechanism movably installed on the machine base along the left - right direction, and an up - down translation mechanism movably installed on the left - right translation mechanism along the up - down direction.

[0017] Wherein, the manipulator is installed on the up - down translation mechanism.

[0018] Optionally, the manipulator includes:

[0019] Two clamping arms, both of which extend along the left - right direction and are arranged at intervals left and right directly above the handling station. The outer ends of the two clamping arms respectively extend to the circumferences of the trays, and the inner ends of the two clamping arms are both movably connected to the up - down translation mechanism so that the left - right distance between the two clamping arms is adjustable.

[0020] Two clamping claws are correspondingly installed at the outer ends of the two clamping arms. Both of the two clamping claws are provided with arc - shaped clamping blocks adapted to the membrane disc; and,

[0021] A grasping cylinder is used to drive the two clamping arms to move.

[0022] Optionally, a circumferential edge of the tray protrudes upward to form an annular limiting ring, and a plurality of notches are correspondingly provided on the annular limiting ring for the two clamping claws.

[0023] Optionally, the left - right translation mechanism includes a left - right track extending along the left - right direction, and the left - right track is provided with a first sliding seat for forming a left - right sliding fit.

[0024] The up - down translation mechanism includes an up - down track extending along the up - down direction. The up - down track is connected to the first sliding seat and is provided with a second sliding seat for forming an up - down sliding fit. The second sliding seat is used to connect with the manipulator.

[0025] The handling mechanism further includes a left - right driving device for driving the first sliding seat to slide, and an up - down driving device for driving the second sliding seat to slide.

[0026] Optionally, a plurality of protrusions are provided on the lower end face of the membrane disk, the plurality of protrusions are uniformly arranged along the circumferential direction of the membrane disk, and a corresponding plurality of concave holes are provided on the upper end face of the membrane disk and the upper end face of the tray.

[0027] Optionally, a blanking mechanism is further included, and the blanking mechanism is used to jack up the membrane disk located at the handling station upward;

[0028] The blanking mechanism includes:

[0029] A ejector post, which is installed below the handling station in a vertically movable manner, the upper end of the ejector post penetrates through the turntable and can abut against the lower end face of the tray upward; and,

[0030] A blanking driving motor for driving the driving rod to move up and down, the driving shaft of the blanking driving motor is arranged to move in the up - down direction, and has a driving position where it inserts into the lower end of the ejector post and a disengaging position where it disengages from the lower end of the ejector post.

[0031] In the technical solution of the present invention, the membrane disk handling device is provided with a turntable for simultaneously placing a plurality of membrane disks. The turntable can rotate and stop at the handling station. When it stops, the handling mechanism transfers the membrane disk at the handling station to the conveying station. At the conveying station, a plurality of membrane disks can be stacked from bottom to top in sequence. Thus, a single conveying action can convey a plurality of membrane disks, improving the efficiency of the production line, saving manpower and material resources. The top plate at the conveying station is used for stacking a plurality of membrane disks. During the handling process of the handling mechanism, the height of the top plate is continuously adjusted. The purpose is to make the top plate itself or the highest membrane disk on the top plate keep the same height as the handling station, so as to simplify the movement of the handling mechanism as much as possible during each handling, that is, the handling mechanism only moves in the left - right direction as much as possible, and will not cause excessive up - down movement due to the change in the height caused by the increase in the number of membrane disks on the top plate, avoiding different movements of the handling mechanism during each handling. This membrane disk handling device improves the handling efficiency of the handling mechanism and saves working time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0033] Figure 1Schematic three-dimensional view of an embodiment of the film disk handling device provided by the present invention;

[0034] Figure 2 For Figure 1 Schematic three-dimensional view of the manipulator and the tray;

[0035] Figure 3 For Figure 1 Schematic three-dimensional view of a partial structure.

[0036] Explanation of the reference numerals in the drawings:

[0037] Label Name Label Name 100 Membrane Disc Handling Equipment 411 Clamping Arm 1 Machine Base 412 Clamping Claw 200 Membrane Disc 413 Arc-shaped Clamping Block 201 Concave Hole 414 Gripping Cylinder 202 Protrusion 42 Left-right Track 21 Rotary Table 421 First Slide Base 22 Pallet 422 Left-right Driving Motor 221 Notch 43 Up-down Track 23 Rotary Table Driving Device 431 Second Slide Base 3 Conveyor Track 51 Top Plate Driving Motor 31 Conveyor Belt 61 Top Column 4 Handling Mechanism 62 Ejecting Driving Motor 41 Manipulator

[0038] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0040] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] In the automatic filling line of facial masks, after the film discs are filled by the filling machine, they need to be transported to the hands of workers for loading. If the film discs are transported in sequence one by one, not only is the efficiency low, but also a large amount of manpower and material resources are wasted. Therefore, the existing transportation method generally is to concentrate multiple film discs in one place and then send them to the hands of workers for loading. Since the height changes when the film discs are stacked, the handling mechanism has cumbersome movements during transportation and needs to move in multiple directions, and the efficiency improvement is not obvious.

[0043] To solve the above problems, please refer to Figure 1 FIG. 1, which is an embodiment of the film disc handling device 100 proposed by the present invention. In this embodiment, the film disc handling device 100 includes a machine base 1, a turntable 21, a handling mechanism 4, and a top plate (not shown in the drawings). The machine base 1 has a handling station and a conveying station arranged at intervals in the left-right direction. The turntable 21 is used for sequentially placing multiple film discs 200 along its circumference. The turntable 21 is rotatably mounted on the machine base 1 along the vertical axis to drive multiple film discs 200 to reach the handling station successively. The handling mechanism 4 is movably mounted on the machine base 1 along the transverse direction. The handling mechanism 4 is used to transfer the film disc 200 at the handling station to the conveying station. The top plate is correspondingly mounted on the machine base 1 along the vertical direction and is telescopable. The top plate is used for placing the film discs 200 transferred by the handling mechanism 4 in a stacked manner from bottom to top, so that the top plate or the film disc 200 at the uppermost position is at the same height as the conveying station.

[0044] The film disc handling device 100 is applicable to the automatic filling production line of facial masks. After the film discs 200 pass through the filling machine, they can be transported out by the film disc handling device 100. Specifically, the film disc handling device 100 is provided with a turntable 21 for simultaneously placing multiple film discs 200. The turntable 21 is rotatable and stops at the handling station. When it stops, the handling mechanism 4 transfers the film disc 200 at the handling station to the conveying station. Multiple film discs 200 can be placed in a stacked manner from bottom to top at the conveying station, so that one conveying action can convey multiple film discs 200, improving the efficiency of the production line and saving manpower and material resources. Further, the top plate at the conveying station is used for stacking and placing multiple film discs 200. During the transportation process of the handling mechanism 4, the top plate continuously adjusts its height. The purpose is to make the top plate itself or the film disc 200 at the highest position on the top plate at the same height as the handling station, so that the movement of the handling mechanism 4 during each handling is as simplified as possible, that is, the handling mechanism 4 only moves along the left-right direction as much as possible, and will not cause excessive up-and-down movement due to the change in the height caused by the increase in the number of film discs 200 on the top plate, avoiding the movement of the handling mechanism 4 being different each time. The film disc handling device 100 improves the handling efficiency of the handling mechanism 4 and saves working time.

[0045] Obviously, in this embodiment, the top plate at the conveying station is for adjusting the height of the top plate or the film disc 200 located on the top plate. In other embodiments, height adjustment can also be achieved by setting elastic members that can expand and contract in the up-and-down direction, etc.

[0046] In addition, during the handling process, if the handling mechanism 4 needs to lift the film disc 200 upward from the relevant device provided on the turntable 21, it also needs to move in the up-and-down direction, which is not contradictory to the problems solved and the beneficial effects achieved by this film disc handling device 100. When the handling mechanism 4 moves the film disc 200 to the conveying station, the handling mechanism 4 does not need to move in the up-and-down direction, and the actions of the handling mechanism 4 during each handling can still be simplified.

[0047] Furthermore, this film disc handling device 100 further includes a conveying track 3. The conveying track 3 is provided below the left of the turntable 21 and includes two conveyor belts 31 that extend in the left-right direction and are arranged side by side in the front-back direction. The top plate is arranged between the two conveyor belts 31 for the film discs 200 to be stacked and placed from bottom to top in sequence.

[0048] The conveying track 3 can improve the working efficiency of the production line. After the handling of the film discs 200 is completed, the top plate moves downward to place the film discs 200 on the conveying track 3, and then the conveying track 3 starts to convey the film discs 200 out.

[0049] Furthermore, this film disc handling device 100 further includes a top plate mechanism for driving the top plate to move in the up-and-down direction. The top plate mechanism includes a bracket and a top plate driving motor 51. The bracket extends in the up-and-down direction. The bracket is connected to the lower end surface of the top plate to support the top plate, and the top plate driving motor 51 is used to drive the bracket to move in the up-and-down direction.

[0050] Furthermore, this film disc handling device 100 further includes a main controller and a position sensor. The position sensor is arranged near the bracket to detect the height of the bracket. The main controller is electrically connected to the position sensor and the driving device of the conveying track 3 to control the operation of the conveying track 3 according to the height of the bracket.

[0051] When the handling mechanism 4 is handling, the conveying track 3 needs to stop running. When the handling by the handling mechanism 4 is completed, it can be detected by the position sensor that the handling is completed, and at this time, the conveying track 3 needs to start running.

[0052] Furthermore, please refer to Figure 1 - Figure 2 , a plurality of trays 22 are provided on the turntable 21. The plurality of trays 22 are evenly distributed along the circumference of the turntable 21 at the handling station to correspondingly carry a plurality of film discs 200. The film disc handling device 100 further includes a turntable driving device 23 to drive the turntable 21 to rotate with the up-and-down direction as the axis and stop at the handling station.

[0053] In this embodiment, the number of trays 22 is four. Obviously, the number of trays 22 can be set according to the actual situation of the working line.

[0054] Further, the handling mechanism 4 includes a manipulator 41 for clamping the film disk 200. The manipulator 41 has a moving stroke in the up-and-down direction and in the left-and-right direction. The handling mechanism 4 further includes a left-and-right translation mechanism movably mounted on the machine base 1 in the left-and-right direction, and an up-and-down translation mechanism movably mounted on the left-and-right translation mechanism in the up-and-down direction. Among them, the manipulator 41 is mounted on the up-and-down translation mechanism.

[0055] In this embodiment, the handling mechanism 4 is provided with a manipulator 41, which can complete the automatic handling of the film disk 200. The moving stroke of the manipulator 41 in the up-and-down direction and in the left-and-right direction can be carried out simultaneously, improving the handling efficiency and saving manpower and material resources.

[0056] Further, the manipulator 41 includes two clamping arms 411, two clamping claws 412 and a grasping cylinder 414. The two clamping arms 411 both extend in the left-and-right direction and are arranged at intervals in the left-and-right direction directly above the handling station. The outer ends of the two clamping arms 411 respectively extend to the peripheries of the trays 22. The inner ends of the two clamping arms 411 are both movably connected to the up-and-down translation mechanism so that the left-and-right distance between the two clamping arms 411 is adjustable. The two clamping claws 412 are correspondingly mounted at the outer ends of the two clamping arms 411. The two clamping claws 412 are both provided with arc-shaped clamping blocks 413 adapted to the film disk 200. The grasping cylinder 414 is used to drive the two clamping arms 411 to move.

[0057] In this embodiment, the handling mechanism 4 handles the film disk 200 by clamping it with the manipulator 41. Of course, in other embodiments, the film disk 200 can be adsorbed by the manipulator 41, or the manipulator 41 can be replaced with an annular suction cup, etc. The manipulator 41 has two clamping arms 411. Of course, in other embodiments, it can also be provided with three, four or more clamping arms 411. Specifically, the two clamping arms 411 in this embodiment are both provided with arc-shaped clamping blocks 413 at their outer ends, so that the film disk 200 can be firmly clamped.

[0058] In this embodiment, the two clamping arms 411 are clamped by adjusting their distances. In other embodiments, clamping can also be carried out by rotatably connecting the clamping claws 412 to the clamping arms 411.

[0059] Further, the periphery of the tray 22 bulges upward 202 to form an annular limiting ring. The annular limiting ring is provided with a plurality of notches 221 corresponding to the two clamping claws 412. The inner diameter of the annular limiting ring is adapted to the outer diameter of the film disk 200, fixing the position of the film disk 200 and preventing the manipulator 41 from pushing the film disk 200 out of the handling station during handling due to incorrect operation.

[0060] Further, the left - right translation mechanism includes a left - right track 42 extending in the left - right direction. The left - right track 42 is provided with a first sliding seat 421 for forming a left - right sliding fit. The up - down translation mechanism includes an up - down track 43 extending in the up - down direction. The up - down track 43 is connected to the first sliding seat 421 and is provided with a second sliding seat 431 for forming an up - down sliding fit. The second sliding seat 431 is used to connect with the manipulator 41. The handling mechanism 4 further includes a left - right driving device for driving the sliding of the first sliding seat 421 and an up - down driving device for driving the sliding of the second sliding seat 431.

[0061] In this embodiment, the left - right track 42 is further provided with a left - right driving motor 422 for driving the left - right sliding of the first sliding seat 421. Its speed is fast and the control is precise, which is convenient for positioning the position of the manipulator 41. The up - down track 43 is further provided with an up - down driving cylinder to drive the second sliding seat 431, and then drive the manipulator 41 to move in the up - down direction.

[0062] In other embodiments, the left - right translation mechanism and the up - down translation mechanism can also be used to realize the left - right movement and up - down movement of the handling mechanism 4 by setting a lead screw.

[0063] Further, please refer to Figure 1 - Figure 3 , a plurality of protrusions 202 are provided on the lower end surface of the membrane disc 200. The plurality of protrusions 202 are evenly arranged along the circumferential direction of the membrane disc 200. A corresponding plurality of concave holes 201 are provided on the upper end surface of the membrane disc 200 and the upper end surface of the tray 22.

[0064] Through the cooperation of the protrusions 202 and the concave holes 201, two adjacent membrane discs 200 can be firmly stacked together. When the membrane disc 200 is located in the tray 22, it can also play a positioning role.

[0065] Further, it further includes a blanking mechanism. The blanking mechanism is used to jack up the membrane disc 200 located at the handling station. The blanking mechanism includes a ejector post 61 and a blanking driving motor 62. The ejector post 61 is movably installed below the handling station in the up - down direction. The upper end of the ejector post 61 penetrates through the turntable 21 and can abut against the lower end surface of the tray 22 upward. The blanking driving motor 62 is used to drive the driving rod to move up and down. The driving shaft of the blanking driving motor 62 is arranged to move in the up - down direction and has a driving position where it inserts into the lower end of the ejector post 61 and a disengaging position where it disengages from the lower end of the ejector post 61.

[0066] In this embodiment, in order to further reduce the up - down movement of the handling mechanism 4 during handling, a blanking mechanism for jacking up the membrane disc 200 is provided at the handling station. The blanking mechanism cooperates with the top - disc mechanism to make the handling mechanism 4 move more in the left - right direction, further simplifying its movement for each board.

[0067] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A membrane disc handling device, characterized in that, Comprising: A machine base having a handling station and a conveying station spaced apart in the left - right direction; A turntable for sequentially placing a plurality of film reels along its circumference. The turntable is rotatably mounted on the machine base about an up - down axis to drive the plurality of film reels to successively reach the handling station; A handling mechanism movably mounted on the machine base in the left - right direction. The handling mechanism is used to transfer the film reel at the handling station to the conveying station; A top plate telescopically mounted on the machine base in the up - down direction corresponding to the conveying station. The top plate is used for sequentially stacking and placing the film reels transferred by the handling mechanism from bottom to top, so that the top plate or the top - most film reel is at the same height as the conveying station; and, A conveying track provided below the left of the turntable and including two conveyor belts extending in the left - right direction and arranged side by side in the front - back direction. The top plate is disposed between the two conveyor belts for sequentially stacking and placing the film reels from bottom to top; wherein, A plurality of trays are provided on the turntable. The plurality of trays are evenly distributed along the circumference of the turntable from the handling station to correspond to carry the plurality of film reels; The film reel handling device further includes a turntable driving device to drive the turntable to rotate about the up - down axis and stop at the handling station.

2. The membrane disk handling device according to claim 1, wherein It further includes a top plate mechanism for driving the top plate to move in the up - down direction. The top plate mechanism includes: A bracket extending in the up - down direction. The bracket is connected to the lower end surface of the top plate to support the top plate; and, A top plate driving motor for driving the bracket to move in the up - down direction.

3. The membrane disk handling device according to claim 1, wherein The handling mechanism includes a manipulator for clamping the film reel. The manipulator has a moving stroke in the up - down direction and the left - right direction; The handling mechanism further includes a left - right translation mechanism movably mounted on the machine base in the left - right direction and an up - down translation mechanism movably mounted on the left - right translation mechanism in the up - down direction; Wherein, the manipulator is mounted on the up - down translation mechanism.

4. The membrane disk handling device according to claim 3, characterized in that, The manipulator includes: Two clamping arms both extending in the left - right direction and spaced apart in the left - right direction and disposed directly above the handling station. The outer ends of the two clamping arms respectively extend to the circumferences of the trays. The inner ends of the two clamping arms are both movably connected to the up - down translation mechanism so that the left - right distance between the two clamping arms is adjustable; Two clamping claws correspondingly mounted at the outer ends of the two clamping arms. The two clamping claws are both provided with arc - shaped clamping blocks adapted to the film reel; and, A grasping cylinder for driving the two clamping arms to move.

5. The membrane disc handling device according to claim 4, characterized in that, The circumference of the tray protrudes upward to form an annular limiting ring. The annular limiting ring is provided with a plurality of notches corresponding to the two clamping claws.

6. The membrane disk handling device according to claim 3, wherein, The left - right translation mechanism includes a left - right track extending in the left - right direction. The left - right track is provided with a first sliding seat for forming a left - right sliding fit; The up - down translation mechanism includes an up - down track extending in the up - down direction. The up - down track is connected to the first sliding seat and is provided with a second sliding seat for forming an up - down sliding fit. The second sliding seat is used to connect to the manipulator; The handling mechanism further includes a left-right driving device for driving the first sliding seat to slide, and an up-down driving device for driving the second sliding seat to slide.

7. The membrane disk handling device according to claim 1, characterized in that, A plurality of protrusions are provided on the lower end surface of the membrane disk, the plurality of protrusions are evenly arranged along the circumferential direction of the membrane disk, and a corresponding plurality of concave holes are provided on the upper end surface of the membrane disk and the upper end surface of the tray.

8. The membrane disk handling device according to claim 1, wherein, It further includes a blanking mechanism for jacking up the membrane disk located at the handling station upward; The blanking mechanism includes: a jacking post, which is movably installed up and down below the handling station, the upper end of the jacking post penetrates through the turntable, and can abut against the lower end surface of the tray upward; and, a blanking driving motor for driving the jacking post to move up and down, the driving shaft of the blanking driving motor is arranged to move up and down, and has a driving position inserted into the lower end of the jacking post and a disengaging position disengaged from the lower end of the jacking post.

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