CN211588038U - Strip steel flattening equipment - Google Patents

Abstract

The utility model relates to the technical field of auxiliary devices for processing band steel, in particular to a band steel flattening device which is additionally provided with an auxiliary mechanism to assist workers in disassembling and assembling the rolled band steel on a feeding roller and a receiving roller, so that the disassembly and assembly operation convenience of the rolled band steel can be realized, and the disassembly and assembly efficiency of the rolled band steel can be improved; the automatic feeding and receiving device comprises a workbench, four groups of supporting legs, a flattening mechanism, a feeding mechanism and a receiving mechanism, wherein the left front side, the left rear side, the right front side and the right rear side of the bottom end of the workbench are respectively connected with the top ends of the four groups of supporting legs; the clamping device further comprises two groups of supporting plates, two groups of sliding plates, two groups of fastening threaded rods and two groups of fastening knobs, wherein two groups of sliding grooves are formed in the outer sides of the top ends of the two groups of supporting plates respectively.

Description

Strip steel flattening equipment

Technical Field

The utility model relates to a belted steel processing auxiliary device's technical field especially relates to a belted steel equipment of flattening.

Background

As is well known, when a strip steel produced by cold rolling is produced and processed, the strip steel is usually required to be flattened, and the process can eliminate yield stress, ensure mechanical properties, control plate shape and reduce surface appearance defects of the strip steel produced in the cold rolling process, wherein the strip steel flattening equipment is a device for flattening the cold-rolled strip steel, and is widely used in the field of strip steel production; the existing band steel flattening equipment comprises a workbench, four groups of supporting legs, a flattening mechanism, a feeding mechanism and a receiving mechanism, wherein the left front side, the left rear side, the right front side and the right rear side of the bottom end of the workbench are respectively connected with the top ends of the four groups of supporting legs; when the existing band steel flattening equipment is used, firstly, a coiled band steel is lifted up through a lifting mechanism, then a worker adjusts the position of the coiled band steel to enable the coiled band steel to be installed on a feeding roller, at the moment, a flattening mechanism can be started, then the output end of the coiled band steel can penetrate through a flattening roller assembly, and then the flattened band steel is coiled and collected through a material collecting mechanism; the existing band steel flattening equipment is found in use, when the band steel of a roll package is installed and removed on a feeding mechanism and a receiving mechanism, the manual auxiliary hoisting mechanism is needed to disassemble and assemble the band steel of the control roll package on a feeding roller and a receiving roller, the operation convenience of the process is poor, the efficiency is low, and the practicability is poor.

Disclosure of Invention

In order to solve the technical problem, the utility model provides an it comes the supplementary staff to carry out the dismouting with the belted steel of package on feed roll and receiving roll to have add complementary unit, consequently not only can the dismouting simple operation nature of the belted steel of package, and can improve the dismouting efficiency of the belted steel of package to strengthen the belted steel equipment of flattening of practicality.

The utility model discloses a band steel equipment that flattens, including workstation, four group's landing legs, flattening mechanism, feeding mechanism and receiving agencies, the bottom left front side of workstation, left rear side, right front side and right rear side are connected with the top of four group's landing legs respectively, flattening mechanism installs in the top middle part of workstation, feeding mechanism and receiving agencies install respectively at the left end and the right-hand member of workstation, flattening mechanism's front end is provided with flattening roller assembly, feeding mechanism and receiving agencies's front end rotates respectively and is provided with feed roll and receiving roll; the inner ends of the two groups of supporting plates are respectively provided with two groups of connecting components which are respectively arranged in the middle parts of the two ends of the workbench, the outer sides of the top ends of the two groups of supporting plates are respectively provided with two groups of sliding grooves which are respectively clamped with the two groups of sliding grooves in a sliding way, the outer ends of the two groups of sliding grooves are respectively provided with two groups of fastening sliding holes in a penetrating way, the middle parts of the outer ends of the two groups of sliding plates are respectively provided with two groups of fastening thread grooves in a penetrating way, the inner ends of the two groups of fastening thread rods respectively pass through the two groups of fastening sliding holes from the outer sides of the two groups of supporting plates in a sliding way and then are respectively inserted into the two groups of fastening thread grooves in a continuing screw installation way, the inner ends of the two groups of fastening thread rods are respectively connected with the outer, the top of two sets of sliding plates is provided with two sets of constant head tanks respectively, and the inside left side and the right side of every group constant head tank all rotate and are provided with two sets of registration rollers.

The utility model discloses a band steel flattening equipment, still include two sets of fixed plates, two sets of adjusting screw rods, two sets of left gag lever posts, two sets of right gag lever posts, two sets of upper holding rings, two sets of lower holding rings and two sets of adjusting handles, the inner of two sets of fixed plates is connected with the bottom region both ends of workstation respectively, the top of two sets of fixed plates is run through respectively and is provided with two sets of patchholes, two sets of patchholes rotate respectively with the bottom region suit of two sets of adjusting screw rods, two sets of lower holding rings and two sets of upper holding rings all with the bottom region suit of two sets of adjusting screw rods, the top of two sets of lower holding rings and the bottom of two sets of upper holding rings respectively with the bottom and the top of two sets of fixed plates rotate to hug closely, the bottom of two sets of left gag lever posts and the bottom, the utility model discloses a two sets of regulation screw rods, including two sets of backup pads, two sets of regulation screw rods and two sets of regulation screw rods, the top right back side and the left back side of two sets of backup pads are provided with two sets of left spacing holes and two sets of right spacing holes of two sets of left spacing holes and two sets of right spacing hole of running through respectively, two sets of regulation screw rods spiral shell dress with two sets of regulation screw rods respectively, two sets of regulation handle's top is connected with two sets of regulation screw rods.

The utility model discloses a belted steel equipment that flattens, the bottom left front side, left rear side, right front side and the right rear side of two sets of sliding plates all are provided with four group's support rods, the bottom of four group's support rods is provided with four group respectively and rotates the groove, four group rotates the inslot and rotates respectively and be provided with four group and rotate the wheel, four group's rotation wheel's bottom all rotates with the bottom of the sliding tray that corresponds and hugs closely.

The utility model discloses a belted steel equipment that flattens, the top and the bottom of two sets of fastening knobs all are provided with two sets of rotation handles.

The utility model discloses a belted steel equipment of flattening still includes four group's lifting threaded rod and four group's cushions, the bottom of four group's landing legs is provided with four group's promotion thread grooves respectively, four group's promotion thread grooves respectively with four group's lifting threaded rod spiral shell dresses, four group's lifting threaded rod's bottom is connected with the top of four group's cushions respectively.

The utility model discloses a belted steel equipment of flattening still includes four anti-skidding handle covers of group, anti-skidding handle cover respectively with the fixed suit of four group's cushion.

The utility model discloses a belted steel equipment of flattening still includes two sets of rotating rings and two sets of protecting caps, two sets of rotating rings rotate the suit with two sets of adjusting handle's handheld position respectively, the top of two sets of protecting caps is connected with two sets of adjusting handle's bottom respectively.

The utility model discloses a belted steel equipment of flattening still includes two sets of protection pieces, the bottom of two sets of protection pieces is connected with the top of two sets of adjusting threaded rod respectively.

Compared with the prior art, the beneficial effects of the utility model are that: before the coiled strip steel needs to be installed on the feed roller, the coiled strip steel can be placed at the top end of the sliding plate of the left supporting plate through the hoisting device, and the coiled strip steel is clamped between the two groups of positioning rollers of the left sliding plate, at the moment, the rotating hole in the middle of the coiled strip steel is concentrically placed with the feed roller, then a worker can unscrew the fastening threaded rod in the fastening threaded groove of the sliding plate through the fastening knob, then the worker can push the coiled strip steel at the rear side to enable the coiled strip steel to slide to the rear side of the supporting plate under the limiting of the sliding plate and the sliding groove until the rotating hole of the coiled strip steel is sleeved on the feed roller, at the moment, the installation process of the coiled strip steel can be completed after the coiled strip steel is positioned on the feed roller, and when the flattened coiled strip steel is unloaded on the take-up roller, at the moment, the discharging process of the coiled strip steel is completed through the matching of the sliding plate on the right side and the supporting plate, so that an auxiliary mechanism is added to assist a worker to disassemble and assemble the coiled strip steel on the feeding roller and the receiving roller, the disassembling and assembling operation convenience of the coiled strip steel is realized, the disassembling and assembling efficiency of the coiled strip steel is improved, and the practicability is enhanced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of a partially enlarged structure of a;

FIG. 3 is a schematic view of the connection structure of two sets of supporting plates and the worktable of the present invention;

fig. 4 is a schematic view of the connection structure of the two sets of left limiting rods and the fixing plate of the present invention;

in the drawings, the reference numbers: 1. a work table; 2. four groups of supporting legs; 3. a flattening mechanism; 4. a feeding mechanism; 5. a material receiving mechanism; 6. a platen roller assembly; 7. a feed roller; 8. a material receiving roller; 9. two sets of support plates; 10. two sets of sliding plates; 11. two groups of fastening threaded rods; 12. two groups of fastening knobs; 13. two sets of sliding grooves; 14. two groups of positioning grooves; 15. two sets of positioning rollers; 16. two groups of fixing plates; 17. two groups of adjusting threaded rods; 18. two groups of left limiting rods; 19. two sets of upper positioning rings; 20. two sets of lower positioning rings; 21. two groups of adjusting handles; 22. four groups of support rods; 23. four groups of rotating grooves; 24. four groups of rotating wheels; 25. two sets of rotating handles; 26. four groups of lifting threaded rods; 27. four groups of cushion blocks; 28. four groups of anti-skid handle sleeves; 29. two groups of rotating rings; 30. two groups of protective caps; 31. two groups of protection blocks.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the utility model discloses a band steel flattening device, including workstation 1, four group's landing legs 2, flattening mechanism 3, feeding mechanism 4 and receiving agencies 5, the bottom left front side, the left rear side, the right front side and the right rear side of workstation 1 are connected with the top of four group's landing legs 2 respectively, flattening mechanism 3 is installed in the middle part of the top of workstation 1, feeding mechanism 4 and receiving agencies 5 are installed respectively at the left end and the right-hand member of workstation 1, flattening mechanism 3's front end is provided with flattening roller subassembly 6, feeding mechanism 4 and receiving agencies 5's front end rotates respectively and is provided with feed roller 7 and receiving rollers 8; the inner ends of the two groups of supporting plates 9 are respectively provided with two groups of connecting components which are respectively arranged in the middle parts of the two ends of the workbench 1, the outer sides of the top ends of the two groups of supporting plates 9 are respectively provided with two groups of sliding grooves 13, the two groups of sliding plates 10 are respectively clamped with the two groups of sliding grooves 13 in a sliding manner, the outer ends of the two groups of sliding grooves 13 are respectively provided with two groups of fastening sliding holes in a penetrating manner, the middle parts of the outer ends of the two groups of sliding plates 10 are respectively provided with two groups of fastening thread grooves in a penetrating manner, the inner ends of the two groups of fastening thread rods 11 respectively slide through the two groups of fastening sliding holes from the outer sides of the two groups of supporting plates 9 and then are respectively inserted into the two groups of fastening thread grooves in a continuing screw manner, the inner ends of the two groups of fastening thread rods 12 are respectively connected, two groups of positioning grooves 14 are respectively arranged at the top ends of the two groups of sliding plates 10, and two groups of positioning rollers 15 are rotatably arranged on the left side and the right side in each group of positioning grooves; before the coiled strip steel needs to be installed on the feed roller, the coiled strip steel can be placed at the top end of the sliding plate of the left supporting plate through the hoisting device, and the coiled strip steel is clamped between the two groups of positioning rollers of the left sliding plate, at the moment, the rotating hole in the middle of the coiled strip steel is concentrically placed with the feed roller, then a worker can unscrew the fastening threaded rod in the fastening threaded groove of the sliding plate through the fastening knob, then the worker can push the coiled strip steel at the rear side to enable the coiled strip steel to slide to the rear side of the supporting plate under the limiting of the sliding plate and the sliding groove until the rotating hole of the coiled strip steel is sleeved on the feed roller, at the moment, the installation process of the coiled strip steel can be completed after the coiled strip steel is positioned on the feed roller, and when the flattened coiled strip steel is unloaded on the take-up roller, at the moment, the discharging process of the coiled strip steel is completed through the matching of the sliding plate on the right side and the supporting plate, so that an auxiliary mechanism is added to assist a worker to disassemble and assemble the coiled strip steel on the feeding roller and the receiving roller, the disassembling and assembling operation convenience of the coiled strip steel is realized, the disassembling and assembling efficiency of the coiled strip steel is improved, and the practicability is enhanced.

The utility model discloses a band steel equipment of flattening, still include two sets of fixed plates 16, two sets of adjusting screw rod 17, two sets of left gag lever post 18, two sets of right gag lever posts, two sets of upper holding ring 19, two sets of lower holding ring 20 and two sets of adjusting handle 21, the inner of two sets of fixed plates 16 is connected with the bottom region both ends of workstation 1 respectively, two sets of patchholes are run through respectively at the top of two sets of fixed plates 16, two sets of patchholes rotate the suit with the bottom region of two sets of adjusting screw rod 17 respectively, two sets of lower holding ring 20 and two sets of upper holding ring 19 are all fixed the suit with the bottom region of two sets of adjusting screw rod 17, the top of two sets of lower holding ring 20 and the bottom of two sets of upper holding ring 19 rotate respectively with the bottom and the top of two sets of fixed plates 16 and hug closely, the bottom of two sets of left gag, two groups of left limiting holes and two groups of right limiting holes are respectively arranged on the right back side and the left back side of the top end of the two groups of supporting plates 9 in a penetrating mode, the two groups of left limiting holes and the two groups of right limiting holes are respectively sleeved with the two groups of left limiting rods 18 and the two groups of right limiting rods in a sliding mode, two groups of adjusting threaded holes are respectively arranged on the right back side and the left back side of the top end of the two groups of supporting plates 9 in a penetrating mode, the two groups of adjusting threaded holes are respectively in threaded connection with the two groups of adjusting threaded rods 17, and the top ends of the two groups; after the coiled strip steel is placed at the tops of the two groups of positioning rollers, the adjusting handle can be rotated to enable the adjusting handle to drive the adjusting threaded rod to rotate in the adjusting threaded hole of the supporting plate under the matching limit of the corresponding upper positioning ring and the corresponding lower positioning ring, at the moment, the supporting plate can longitudinally move under the limit of the corresponding two groups of limiting rods, when the rotating hole of the coiled strip steel on the top of the supporting plate is aligned with the feeding roller, the rotation of the adjusting handle can be stopped, when the flattened coiled strip steel on the material receiving roller is unloaded, the adjusting threaded rod can be driven to rotate by the adjusting handle to ensure that the top ends of the two groups of positioning rollers of the right supporting plate are tightly attached to the bottom end of the coiled strip steel, the operation improves the applicability of the strip steel flattening equipment to the strip steel of rolls with different sizes, thereby reducing the use limitation.

In the band steel flattening equipment of the utility model, four groups of supporting rods 22 are arranged at the left front side, the left rear side, the right front side and the right rear side of the bottom ends of two groups of sliding plates 10, four groups of rotating grooves 23 are respectively arranged at the bottom ends of the four groups of supporting rods 22, four groups of rotating wheels 24 are respectively arranged in the four groups of rotating grooves 23 in a rotating way, and the bottom ends of the four groups of rotating wheels 24 are respectively and closely attached to the bottom ends of the corresponding sliding grooves in a rotating way; the friction force between the sliding plate and the sliding groove is greatly reduced through the four groups of rotating wheels, so that the sliding process of the sliding plate is more labor-saving and convenient, and the practicability is enhanced.

In the band steel flattening equipment of the utility model, two groups of rotating handles 25 are arranged at the top end and the bottom end of two groups of fastening knobs 12; the rotation of the fastening knob is more labor-saving and convenient through the two groups of rotating handles, so that the practicability is enhanced.

The utility model discloses a band steel flattening device, still include four groups of lifting threaded rods 26 and four groups of cushion blocks 27, four groups of landing legs 2's bottom is provided with four groups of lifting thread grooves respectively, four groups of lifting thread grooves respectively with four groups of lifting threaded rods 26 spiral shell dress, four groups of lifting threaded rods 26's bottom is connected with four groups of cushion blocks 27's top respectively; four groups of lifting threaded rods can be driven to rotate in four groups of lifting threaded grooves of four groups of supporting legs through four groups of cushion blocks respectively, the extension lengths of the four groups of cushion blocks on the lower sides of the four groups of supporting legs are changed respectively at the moment, the adjustment of the placing stability of the band steel flattening equipment is realized at the moment, and therefore the practicability is enhanced.

The utility model discloses a band steel flattening device, which also comprises four groups of anti-skid handle sleeves 28 which are respectively fixedly sleeved with four groups of cushion blocks 27; the friction coefficients of the outer side walls of the four groups of cushion blocks are respectively increased through the four groups of anti-skidding handle sleeves, the probability that a hand skids on the outer side walls of the four groups of cushion blocks when the four groups of cushion blocks are rotated is reduced, and therefore the practicability is enhanced.

The utility model discloses a band steel flattening device, which also comprises two groups of rotating rings 29 and two groups of protective caps 30, wherein the two groups of rotating rings 29 are respectively rotatably sleeved with the handheld parts of the two groups of adjusting handles 21, and the top ends of the two groups of protective caps 30 are respectively connected with the bottom ends of the two groups of adjusting handles 21; rotate two sets of regulation handles through two sets of rotating rings can make the rotation of adjusting the handle smooth and easy more, convenient, reduced the probability that the hand was frayed by the regulation handle to the practicality has been strengthened.

The band steel flattening equipment of the utility model also comprises two groups of protection blocks 31, and the bottom ends of the two groups of protection blocks 31 are respectively connected with the top ends of the two groups of adjusting threaded rods 17; through two sets of protection pieces to two sets of adjusting threaded rod spacing, reduced the probability of backup pad slippage on adjusting threaded rod to the practicality has been strengthened.

The utility model discloses a band steel flattening equipment, it is at the during operation, before need installing the belted steel of package on the feed roll, can place the belted steel of package on the top of the sliding plate of left side backup pad through overhead hoist earlier, and make the belted steel card of package block into between two sets of registration rollers of left side sliding plate, the rotating hole in the middle part of the belted steel of package then places with the feed roll is concentric, then the staff can be through fastening knob fastening threaded rod in the fastening thread groove of sliding plate unscrewing, then the staff can think the rear side to promote the belted steel of package and make the belted steel of package slide to the rear side of backup pad under the spacing of sliding plate and sliding tray, until after the rotation hole cover of the belted steel of package is adorned on the feed roll, then can finish the installation process of the belted steel of package with the location on the feed roll at this moment, and when the flattened coiled strip steel is unloaded from the material receiving roller, the unloading process of the coiled strip steel is completed by matching the right sliding plate and the supporting plate.

The terms "front", "rear", "left", "right" and the like as used herein are for illustrative purposes only.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A strip steel flattening device comprises a workbench (1), four groups of supporting legs (2), a flattening mechanism (3), a feeding mechanism (4) and a material receiving mechanism (5), wherein the left front side, the left rear side, the right front side and the right rear side of the bottom end of the workbench (1) are respectively connected with the top ends of the four groups of supporting legs (2), the flattening mechanism (3) is installed in the middle of the top end of the workbench (1), the feeding mechanism (4) and the material receiving mechanism (5) are respectively installed at the left end and the right end of the workbench (1), a flattening roller assembly (6) is arranged at the front end of the flattening mechanism (3), and a feeding roller (7) and a material receiving roller (8) are respectively and rotatably arranged at the front ends of the feeding mechanism (4) and the material receiving mechanism (5); the device is characterized by further comprising two groups of supporting plates (9), two groups of sliding plates (10), two groups of fastening threaded rods (11) and two groups of fastening knobs (12), wherein two groups of connecting assemblies are respectively arranged at the inner ends of the two groups of supporting plates (9), the two groups of connecting assemblies are respectively arranged in the middle of the two ends of the workbench (1), two groups of sliding grooves (13) are respectively arranged on the outer sides of the top ends of the two groups of supporting plates (9), the two groups of sliding plates (10) are respectively slidably clamped with the two groups of sliding grooves (13), two groups of fastening sliding holes are respectively arranged at the outer ends of the two groups of sliding grooves (13) in a penetrating manner, two groups of fastening threaded grooves are respectively arranged in the middle of the outer ends of the two groups of sliding plates (10) in a penetrating manner, the inner ends of the two groups of fastening threaded rods (11) respectively slide through, the inner ends of the two groups of fastening knobs (12) are respectively connected with the outer ends of the two groups of fastening threaded rods (11), the inner ends of the two groups of fastening knobs (12) are respectively clung to the outer ends of the two groups of supporting plates (9), the top ends of the two groups of sliding plates (10) are respectively provided with two groups of positioning grooves (14), and the left side and the right side of the inside of each group of positioning grooves are respectively rotatably provided with two groups of positioning rollers (15).

2. The strip steel flattening device according to claim 1, further comprising two sets of fixing plates (16), two sets of adjusting threaded rods (17), two sets of left limiting rods (18), two sets of right limiting rods, two sets of upper positioning rings (19), two sets of lower positioning rings (20) and two sets of adjusting handles (21), wherein the inner ends of the two sets of fixing plates (16) are respectively connected with two ends of the bottom area of the workbench (1), two sets of inserting holes are respectively arranged at the top ends of the two sets of fixing plates (16) in a penetrating manner, the two sets of inserting holes are respectively sleeved with the bottom areas of the two sets of adjusting threaded rods (17) in a rotating manner, the two sets of lower positioning rings (20) and the two sets of upper positioning rings (19) are respectively sleeved with the bottom areas of the two sets of adjusting threaded rods (17) in a fixed manner, the top ends of the two sets of lower positioning rings (20) and the bottom ends of the two sets, the bottom of two sets of left gag lever posts (18) and the bottom of two sets of right gag lever posts are connected with the top front side and the rear side of two sets of fixed plates (16) respectively, the top right rear side and the left rear side of two sets of backup pads (9) are run through respectively and are provided with two sets of left spacing holes and two sets of right spacing holes, two sets of left spacing holes and two sets of right spacing holes respectively with two sets of left gag lever posts (18) and two sets of right gag lever posts slip the suit, the top right rear side and the left rear side of two sets of backup pads (9) are run through respectively and are provided with two sets of adjusting screw holes, two sets of adjusting screw holes respectively with two sets of adjusting threaded rod (17) spiral shell dress, the top of two sets of regulation handles (21) is connected with the bottom of two sets of adjusting.

3. The strip steel flattening device according to claim 2, characterized in that four sets of support rods (22) are respectively arranged on the left front side, the left rear side, the right front side and the right rear side of the bottom ends of the two sets of sliding plates (10), four sets of rotating grooves (23) are respectively arranged on the bottom ends of the four sets of support rods (22), four sets of rotating wheels (24) are respectively and rotatably arranged in the four sets of rotating grooves (23), and the bottom ends of the four sets of rotating wheels (24) are respectively and rotatably attached to the bottom ends of the corresponding sliding grooves.

4. A strip flattening apparatus according to claim 3, characterized in that two sets of turning handles (25) are provided at the top and bottom ends of said two sets of tightening knobs (12).

5. The strip steel flattening apparatus according to claim 4, further comprising four sets of lifting threaded rods (26) and four sets of cushion blocks (27), wherein the four sets of legs (2) are respectively provided at bottom ends thereof with four sets of lifting threaded grooves, the four sets of lifting threaded grooves are respectively screwed with the four sets of lifting threaded rods (26), and the four sets of lifting threaded rods (26) are respectively connected at bottom ends thereof with top ends of the four sets of cushion blocks (27).

6. The strip steel flattening apparatus according to claim 5, further including four sets of anti-slip handle sleeves (28) fixedly sleeved with the four sets of spacers (27), respectively.

7. The strip steel flattening device according to claim 6, further comprising two sets of rotating rings (29) and two sets of protective caps (30), wherein the two sets of rotating rings (29) are respectively rotatably sleeved on the hand-held portions of the two sets of adjusting handles (21), and the top ends of the two sets of protective caps (30) are respectively connected with the bottom ends of the two sets of adjusting handles (21).

8. The strip steel flattening apparatus according to claim 7, further comprising two sets of protection blocks (31), wherein the bottom ends of the two sets of protection blocks (31) are respectively connected with the top ends of the two sets of adjusting threaded rods (17).

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