An adjustable standard section for the mutual conversion of the inclined and straight ladders of tower cranes

Abstract

The present invention relates to an adjustable standard section for the mutual conversion of the inclined and straight ladders of a tower crane. A cross-shaped connecting rod is fixed at the bottom of the standard section frame. A cylindrical support rod is fixed at the top of the connecting rod. A lower platform is connected to the outside of the support rod through the installation of a second bearing. A central tube is arranged at the top of the lower platform. A second adjusting member is arranged at the top end of the central tube. A rotating staircase is connected to the outside of the central tube through a sleeve. The bottom of the rotating staircase is connected to the lower platform through the installation of a first bearing. A first adjusting member is arranged at the top end of the sleeve. A diagonal bar and an upper platform are respectively arranged at the top of the standard section frame. A limiting member for connecting the first adjusting member and the second adjusting member is arranged at the bottom of the upper platform. An inserting block for connecting the diagonal bar is arranged at the top of the upper platform. Fixing blocks for connecting the standard section frame are arranged at both ends of the diagonal bar. A fixing hole adapted to the inserting block is formed at the bottom of the diagonal bar.

Description

Technical Field

[0001] The present invention relates to an adjustable standard section for the mutual conversion of a tower crane's inclined and straight ladders, which is applied in the technical field of tower crane inclined and straight ladder conversion. Background Art

[0002] As is well known, during the use of tower cranes, the situation of mixed use of standard sections often occurs, with the old straight ladders and new inclined ladders being used in combination. There is often no installation transition section between the straight ladder and the inclined ladder, but they are directly connected, causing quite a lot of trouble for tower crane drivers or maintenance personnel when going up and down the tower crane, and there are also safety risks, endangering the lives of personnel; moreover, when the old straight ladders and new inclined ladders are used in combination, they may be installed on different side walls in different tower crane standard sections. Therefore, we urgently need to develop a standard section for the mutual conversion of tower crane inclined and straight ladders, and be able to adjust for the problem of the installation of inclined and straight ladders on different side walls inside the tower crane. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides an adjustable standard section for the mutual conversion of a tower crane's inclined and straight ladders, which can effectively solve the problem of no conversion section between the straight ladder and the inclined ladder, ensuring the safety of tower crane drivers or maintenance personnel when going up and down the tower crane; and enabling the conversion standard section to be adjusted for the straight ladders and inclined ladders installed on different side walls inside the tower crane.

[0004] The technical solution of the present invention is as follows:

[0005] An adjustable standard section for the mutual conversion of a tower crane's inclined and straight ladders includes a standard section frame. At the bottom of the standard section frame, a "cross"-shaped connecting rod is fixed. At the top of the connecting rod, a cylindrical support rod is fixed. The outside of the support rod is connected to a lower platform through the setting of a second bearing. At the top of the lower platform, a central tube is provided. At the top end of the central tube, a second adjusting member is provided; the outside of the central tube is connected to a rotating staircase through a sleeve. The bottom of the rotating staircase is connected to the lower platform through the setting of a first bearing. At the top end of the sleeve, a first adjusting member is provided; at the top of the standard section frame, a diagonal bar and an upper platform are respectively provided. At the bottom of the upper platform, a limiting member for connecting the first adjusting member and the second adjusting member is provided; at the top of the upper platform, an inserting block for connecting the diagonal bar is provided. At both ends of the diagonal bar, fixing blocks for connecting the standard section frame are provided. A fixing hole adapted to the inserting block is opened at the bottom of the diagonal bar.

[0006] On the front side wall of the standard section frame, a number of jacking steps are symmetrically provided. At the four corners of the top of the standard section frame, slot holes are opened. At the four corners of the bottom of the standard section frame, limiting blocks adapted to the slot holes are provided. Pin holes are provided on the outer sides of the slot holes and the limiting blocks. At the four corners of the inner bottom of the standard section frame, arc-shaped connecting mesh pieces are fixed.

[0007] The lower platform is a circular mesh structure. A sector-shaped lower opening is provided on the lower platform. A cylindrical central pipe is fixedly connected to the center of the top surface of the lower platform. The central pipe is a hollow structure. A second adjusting member is fixed on the outer side wall at the top end of the central pipe, and the second adjusting member is inserted into the limiting member.

[0008] The second adjusting member includes eight long strip-shaped adjusting columns. The eight adjusting columns are evenly distributed at equal intervals on the outer wall surface at the top end of the central pipe in a scattered manner. The side wall surface of the adjusting column is non-removably connected to the side wall surface of the central pipe.

[0009] The outside of the central pipe is movably connected to a sleeve. The sleeve is a cylindrical tubular structure. A rotating staircase is fixedly connected to the outside of the sleeve. The rotating staircase is as high as the sleeve. A first adjusting member is fixed at the top end of the sleeve, and the first adjusting member is inserted into the limiting member.

[0010] The first adjusting member includes forty adjusting teeth. The forty adjusting teeth are evenly distributed on the outer side wall at the top end of the sleeve.

[0011] The limiting member is arranged at the center of the bottom surface of the upper platform. The upper platform is a circular mesh structure. A sector-shaped upper opening is provided on the upper platform. The limiting member is a cylindrical structure with an opening at the bottom. A plurality of first limiting grooves and a plurality of second limiting grooves are respectively provided on the inner wall surface of the limiting member. The second limiting grooves are arranged above the first limiting grooves. The outer diameter of the second limiting grooves is the same as the inner diameter of the first limiting grooves. The first limiting grooves are adapted to the adjusting teeth of the first adjusting member, and the second limiting grooves are adapted to the adjusting columns of the second adjusting member.

[0012] The upper platform is inserted into the fixing hole at the bottom of the diagonal bar through the insertion block at its top. The fixing blocks arranged at both ends of the diagonal bar are fixedly connected to the two inner corners at the top of the standard section frame.

[0013] The present invention has the following beneficial effects:

[0014] 1. By arranging a conversion standard section between the old straight ladder and the new inclined ladder, the present invention avoids troubles for tower crane drivers or maintenance personnel when going up and down the tower crane, eliminates safety risks, provides absolute protection for the lives of operators, and when the operator goes from the old straight ladder to the new inclined ladder or from the new inclined ladder to the old straight ladder, upper openings and lower openings are respectively provided on the upper platform and the lower platform of the conversion standard section, facilitating the operator to enter and exit, and the operator can take a short rest inside the conversion standard section.

[0015] 2. By providing a second bearing between the lower platform and the standard section frame, the present invention enables the angle of the lower platform to be adjusted. The straight ladder or inclined ladder at the lower part of the conversion standard section can be installed on different inner wall surfaces. By rotating the lower platform, the position of the lower opening can be adjusted to correspond to the straight ladder. By providing a first bearing between the rotating staircase and the lower platform, the rotating staircase can rotate relative to the lower platform, further finely adjusting the angle of the rotating staircase. The angle of the upper opening can also be adjusted by inserting the limiting members at the bottom of the upper platform into the first adjusting member and the second adjusting member at different angles, so as to adapt to the straight ladder or inclined ladder at the upper part of the conversion standard section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the standard section frame in the present invention;

[0018] Figure 3 is a schematic diagram of the structure of the lower platform in the present invention;

[0019] Figure 4 is Figure 3 an enlarged schematic diagram of the structure at position C in;

[0020] Figure 5 is a schematic diagram of the structure of the rotating staircase in the present invention;

[0021] Figure 6 is Figure 5 an enlarged schematic diagram of the structure at position B in;

[0022] Figure 7 is a schematic diagram of the bottom structure of the upper platform in the present invention;

[0023] Figure 8 is a schematic diagram of the structure of the limiting member in the present invention;

[0024] Figure 9 is a schematic diagram of the bottom structure of the diagonal bar in the present invention;

[0025] In the figure, the reference numerals are shown as:

[0026] 1. Standard section frame; 11. Slot; 12. Pin hole; 13. Jacking step; 14. Connecting mesh; 15. Support rod; 2. Diagonal bar; 21. Fixing hole; 22. Fixing block; 3. Upper platform; 31. Upper opening; 32. Limiting member; 33. First limiting groove; 34. Second limiting groove; 4. Rotating staircase; 41. Sleeve; 42. First adjusting member; 5. Lower platform; 51. Lower opening; 52. Central tube; 53. Second adjusting member; 6. First bearing; 7. Second bearing. Detailed implementation manners

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] See Figures 1 to 9 An adjustable standard section for mutual conversion between inclined and straight ladders of a tower crane, comprising a standard section frame 1. A "cross"-shaped connecting rod is fixed at the bottom of the standard section frame 1. A cylindrical support rod 15 is fixed at the top of the connecting rod. A lower platform 5 is connected to the outside of the support rod 15 through a second bearing 7. A central tube 52 is arranged on the top of the lower platform 5. A second adjusting member 53 is arranged at the top end of the central tube 52. A rotating staircase 4 is connected to the outside of the central tube 52 through a sleeve 41. The bottom of the rotating staircase 4 is connected to the lower platform 5 through a first bearing 6. A first adjusting member 42 is arranged at the top end of the sleeve 41. Diagonal bars 2 and an upper platform 3 are respectively arranged at the top of the standard section frame 1. A limiting member 32 for connecting the first adjusting member 42 and the second adjusting member 53 is arranged at the bottom of the upper platform 3. An inserting block for connecting the diagonal bar 2 is arranged at the top of the upper platform 3. Fixing blocks 22 for connecting the standard section frame 1 are arranged at both ends of the diagonal bar 2. A fixing hole 21 adapted to the inserting block is formed at the bottom of the diagonal bar 2.

[0029] A plurality of jacking steps 13 are symmetrically arranged on the front side wall of the standard section frame 1. Slots 11 are formed at the four corners of the top of the standard section frame 1. Limiting blocks adapted to the slots 11 are arranged at the four corners of the bottom of the standard section frame 1. Pin holes 12 are arranged on the outer sides of the slots 11 and the limiting blocks. Arc-shaped connecting mesh sheets 14 are fixed at the four corners of the inner bottom of the standard section frame 1.

[0030] The lower platform 5 is of a circular mesh structure. A sector-shaped lower opening 51 is formed on the lower platform 5. A cylindrical central tube 52 is fixedly connected to the center of the top surface of the lower platform 5. The central tube 52 is of a hollow structure. A second adjusting member 53 is fixed on the outer side wall of the top end of the central tube 52. The second adjusting member 53 is inserted into the limiting member 32.

[0031] The second adjusting member 53 includes eight long strip-shaped adjusting columns. The eight adjusting columns are equidistantly distributed in a scattered manner on the outer wall surface of the top end of the central tube 52. The side wall surface of the adjusting column is non-detachably connected to the side wall surface of the central tube 52.

[0032] The outside of the central tube 52 is movably connected to the sleeve 41. The sleeve 41 is of a cylindrical tubular structure. The rotating staircase 4 is fixedly connected to the outside of the sleeve 41. The rotating staircase 4 is as high as the sleeve 41. A first adjusting member 42 is fixed at the top end of the sleeve 41. The first adjusting member 42 is inserted into the limiting member 32.

[0033] The first adjusting member 42 includes forty adjusting teeth, and the forty adjusting teeth are evenly distributed on the outer side wall of the top end of the sleeve 41.

[0034] The limiting member 32 is arranged at the center of the bottom surface of the upper platform 3. The upper platform 3 is a circular mesh structure, and a sector-shaped upper opening 31 is formed in the upper platform 3. The limiting member 32 is a cylindrical structure with an opening at the bottom. A plurality of first limiting grooves 34 and a plurality of second limiting grooves 33 are respectively formed on the inner wall surface of the limiting member 32. The second limiting grooves 33 are arranged above the first limiting grooves 34. The outer diameter of the second limiting grooves 33 is the same as the inner diameter of the first limiting grooves 34. The first limiting grooves 34 are adapted to the adjusting teeth of the first adjusting member 42, and the second limiting grooves 33 are adapted to the adjusting columns of the second adjusting member 53.

[0035] The upper platform 3 is inserted into the fixing hole 21 at the bottom of the diagonal bar 2 through the insertion block at its top, and the fixing blocks 22 arranged at both ends of the diagonal bar 2 are fixedly connected to the two inner corners at the top of the standard section frame 1.

[0036] The working principle of the present invention:

[0037] When using the present invention, first install the second bearing 7 at the inner bottom of the standard section frame 1, that is, sleeve the second bearing 7 outside the support rod 15 and let it fall to the bottom. Further install the lower platform 5, socket the central tube 52 outside the support rod 15, and connect the bottom surface of the lower platform 5 to the second bearing 7. Then, sleeve the first bearing 6 outside the central tube 52. After the first bearing 6 falls to the bottom, sleeve the sleeve 41 outside the central tube 52, so that the spiral staircase 4 outside the sleeve 41 is connected to the top surface of the lower platform 5 through the first bearing 6. At this time, the lower platform 5 can rotate through the second bearing 7, and the spiral staircase 4 can also rotate through the first bearing 6. During the actual installation process, according to the installation surfaces of the straight ladder or inclined ladder located at the upper and lower parts of the standard section frame 1, select an appropriate angle to rotate the lower opening 51 of the lower platform 5 to a suitable position, and then the angle can be finely adjusted by slightly rotating the spiral staircase 4. The second adjusting member 53 is provided with eight adjusting columns, so that the angle between adjacent two adjusting columns is fixed at 45 degrees. The adjusting teeth on the first adjusting member 42 are provided with forty, so that the angle between adjacent two adjusting teeth is fixed at 9 degrees, which is convenient for having data to refer to when adjusting the angle. After the adjustment is completed, further install the upper platform 3, and limit the positions of the central tube 52 and the sleeve 41 through the limiting member 32 on the bottom surface of the upper platform 3. First, align and insert the first adjusting member 53 at the top of the central tube 52 into the first limiting groove 33 inside the limiting member 32, and then align and insert the second adjusting member 42 at the top of the sleeve 41 into the second limiting groove 34 inside the limiting member 32. In this way, under the action of the limiting member 32, the positions of the lower platform 5 and the spiral staircase 4 are fixed. Before installing the upper platform 3, attention should be paid to the angle matching between the direction of the upper opening 31 and the straight ladder or inclined ladder installed at the upper part of the standard section frame 1, to avoid the bottom landing point of the straight ladder or inclined ladder being set at the upper opening 31. Then, further insert the fixing hole 21 at the bottom of the diagonal bar 2 into the insertion block at the top of the upper platform 3, and then connect the two fixing blocks 22 at both ends of the diagonal bar 2 to the standard section frame 1 through bolts. The slots 11 and pin holes 12 provided on the standard section frame 1 facilitate its connection with the upper and lower standard sections. The setting of the connecting mesh 14 makes there be no gap between the outer circles of adjacent two standard sections, the upper platform 3 and the lower platform 5, thus preventing people or objects from falling.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. An adjustable standard section for the mutual conversion of the inclined and straight ladders of a tower crane, characterized in that: It includes a standard section frame (1). At the bottom of the standard section frame (1), a "cross"-shaped connecting rod is fixed. At the top of the connecting rod, a cylindrical support rod (15) is fixed. The outside of the support rod (15) is connected to a lower platform (5) by arranging a second bearing (7). At the top of the lower platform (5), a central tube (52) is arranged. At the top end of the central tube (52), a second adjusting member (53) is arranged; the outside of the central tube (52) is connected to a rotating staircase (4) through a sleeve (41). The bottom of the rotating staircase (4) is connected to the lower platform (5) by arranging a first bearing (6). At the top end of the sleeve (41), a first adjusting member (42) is arranged. The first adjusting member (42) includes forty adjusting teeth, and the forty adjusting teeth are evenly distributed on the outer side wall of the top end of the sleeve (41); at the top of the standard section frame (1), a diagonal bar (2) and an upper platform (3) are respectively arranged. At the bottom of the upper platform (3), a limiting member (32) for connecting the first adjusting member (42) and the second adjusting member (53) is arranged; at the top of the upper platform (3), an insertion block for connecting the diagonal bar (2) is arranged. At both ends of the diagonal bar (2), fixing blocks (22) for connecting the standard section frame (1) are arranged. At the bottom of the diagonal bar (2), a fixing hole (21) adapted to the insertion block is opened; on the front side wall of the standard section frame (1), a number of jacking steps (13) are symmetrically arranged. At the four corners of the top of the standard section frame (1), slots (11) are opened. At the four corners of the bottom of the standard section frame (1), limiting blocks adapted to the slots (11) are arranged. Pin holes (12) are arranged on the outer sides of the slots (11) and the limiting blocks. At the four corners of the inner bottom of the standard section frame (1), arc-shaped connecting mesh pieces (14) are fixed; the lower platform (5) is a circular mesh structure. On the lower platform (5), a sector-shaped lower opening (51) is opened. At the center of the top surface of the lower platform (5), a cylindrical central tube (52) is fixedly connected. The central tube (52) is a hollow structure. On the outer side wall of the top end of the central tube (52), a second adjusting member (53) is fixed. The second adjusting member (53) includes eight long strip-shaped adjusting columns. The eight adjusting columns are evenly distributed in a scattered manner on the outer wall surface of the top end of the central tube (52). The second adjusting member (53) is inserted into the limiting member (32). The limiting member (32) is arranged at the center of the bottom surface of the upper platform (3). On the upper platform (3), a sector-shaped upper opening (31) is opened. On the inner wall surface of the limiting member (32), a number of first limiting grooves (34) and a number of second limiting grooves (33) are respectively opened. The first limiting grooves (34) are adapted to the adjusting teeth of the first adjusting member (42), and the second limiting grooves (33) are adapted to the adjusting columns of the second adjusting member (53).

2. The adjustable standard section for the mutual conversion of the inclined and straight ladders of a tower crane according to claim 1, characterized in that: The side wall surface of the adjusting column is non-removably connected to the side wall surface of the central tube (52).

3. An adjustable standard section for mutual conversion of inclined and straight ladders of tower cranes according to claim 2, characterized in that: the outside of the central pipe (52) is movably connected to the sleeve (41), the sleeve (41) is a cylindrical tubular structure, a rotating staircase (4) is fixedly connected to the outside of the sleeve (41), the rotating staircase (4) is at the same height as the sleeve (41), a first adjusting member (42) is fixed to the top of the sleeve (41), and the first adjusting member (42) is inserted into the limiting member (32).

4. An adjustable standard section for mutual conversion of inclined and straight ladders of tower cranes according to claim 1, characterized in that: the upper platform (3) is a circular mesh structure, the limiting member (32) is a cylindrical structure with an open bottom, the second limiting groove (33) is arranged above the first limiting groove (34), and the outer diameter of the second limiting groove (33) is the same as the inner diameter of the first limiting groove (34).

5. An adjustable standard section for mutual conversion of inclined and straight ladders of tower cranes according to claim 4, characterized in that: the upper platform (3) is inserted into the fixing hole (21) at the bottom of the diagonal bar (2) through the insertion block at its top, and the fixing blocks (22) arranged at both ends of the diagonal bar (2) are fixedly connected to the two inner corners at the top of the standard section frame (1).

Images