A hanger column jib mounting apparatus and method

Abstract

The present application provides a kind of column arm mounting device and mounting method, belong to column arm mounting device field.Column arm mounting device includes frame body, and straight arm positioning device and inclined arm positioning device are arranged on the frame body, straight arm positioning device and inclined arm positioning device are arranged up and down, and inclined arm positioning device is located directly below or obliquely below straight arm positioning device.Column arm mounting method is, first of all, column arm structure is assembled before installation, when assembling, inclined arm is directly installed directly below or obliquely below straight arm, so that column arm structure is vertical or close to vertical state.The present application utilizes column arm assembly unit to pre-assemble column arm structure, and utilizes column arm mounting robot to install the whole column arm structure of the column arm structure of assembly, effectively improves installation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of hanging column bracket installation equipment, and in particular relates to a hanging column bracket installation equipment and installation method. Background Technology

[0002] The cantilever arm serves as the intermediate link between the contact suspension and the rigid cross-span structure. It not only bears the entire weight of the contact suspension but also the combined forces exerted on the contact wire suspension by the train's pantograph during operation. The cantilever arm is typically fixed to a support post via insulators. However, in tunnels, a suspended column needs to be fixed to the tunnel ceiling, and the cantilever arm is then installed on the column. Traditional cantilever arm installation requires manual work at equal height, manually installing the suspended column before installing the cantilever arm. This method is inefficient, labor-intensive, and carries significant safety risks associated with working at height.

[0003] A Chinese invention patent application with publication number CN112046342A and publication date of December 8, 2020 discloses a wrist arm installation device, including a flipping mechanism and a pre-assembly template disposed on the flipping mechanism. The pre-assembly template is used to pre-assemble the wrist arm and includes a template platform and a straight wrist arm positioning device and an oblique wrist arm positioning device disposed on the template platform. After the wrist arm is assembled in a horizontal state, the flipping mechanism flips it from the horizontal state to the vertical state. The wrist arm installation device also includes a robotic arm and an installation template mounted on the robotic arm. The installation template is used to transfer the assembled and vertical wrist arm from the pre-assembly template to the support column, whereby the installer installs the wrist arm onto the support column.

[0004] The above-mentioned technical solution improves the installation efficiency of the cantilever arm by pre-assembling it. However, the cantilever arm needs to be assembled horizontally and then flipped into a vertical position, which restricts the assembly efficiency. Furthermore, the space on the transport train used to load the cantilever arm installation equipment is limited, and there are safety hazards during the flipping operation of the flipping mechanism.

[0005] Additionally, when installing a cantilever arm in a tunnel, it is necessary to first install a suspension column at the tunnel ceiling, and then install the cantilever arm on the suspension column to form a suspension column-cantilever arm structure. See appendix. Figure 1 The cantilever structure of the suspended column includes a suspended column 1 and a straight cantilever 2 and an inclined cantilever 3 installed on one side of the suspended column 1. The ends of the straight cantilever 2 and the inclined cantilever 3 away from the suspended column 1 are connected and fixedly connected. A mounting base 4 is fixedly installed on the top of the suspended column 1. The mounting base 4 is a rectangular flat plate structure with mounting holes for bolts to pass through. An embedded part is set at a position off-center on the top of the tunnel, and bolts for installing the suspended column 1 are set on the embedded part. In the prior art, the suspended column and the cantilever are installed separately and independently, which results in low overall installation efficiency of the suspended column and cantilever structure. Summary of the Invention

[0006] One of the objectives of this invention is to provide a cantilever arm installation device for a suspended column, in order to solve the technical problem of low installation efficiency caused by the need for horizontal assembly and then erection of suspended columns and cantilever arms in tunnels in the prior art.

[0007] Another objective of this invention is to provide a method for installing a cantilever arm on a suspension column to solve the aforementioned technical problems.

[0008] To achieve the above objectives, the technical solution of the suspension column bracket assembly unit provided by the present invention is as follows:

[0009] A cantilever arm installation device for a suspended column includes a frame, on which a straight cantilever arm positioning device and an oblique cantilever arm positioning device are provided. The straight cantilever arm positioning device and the oblique cantilever arm positioning device are arranged vertically, with the oblique cantilever arm positioning device located directly below or obliquely below the straight cantilever arm positioning device.

[0010] The beneficial effects are: the above technical solution is a further improvement on the existing technology. In the above technical solution, since the inclined arm positioning device is located directly below or diagonally below the straight arm positioning device, the inclined arm and the straight arm will be directly in a vertical or nearly vertical state after assembly, without the need to flip the frame, which facilitates the operation of the workers and improves the overall installation efficiency.

[0011] As a further improvement, the frame is provided with at least one column positioning device, which is used to position and fix the column.

[0012] The beneficial effects are as follows: The above technical solution allows for the pre-assembly of the lifting column together with the straight and angled brackets, followed by the overall installation of the lifting column and bracket structure, further improving the installation efficiency of the lifting column and bracket structure. Simultaneously, when assembling the lifting column and bracket structure using the lifting column and bracket assembly unit in the above technical solution, the lifting column can be positioned and fixed first, and then the straight and angled brackets can be positioned using the lifting column, further improving assembly efficiency.

[0013] As a further improvement, both the straight arm positioning device and the oblique arm positioning device include an upward-opening support member for supporting the insulator of the straight arm or oblique arm.

[0014] The beneficial effects are: since the straight and angled brackets can be positioned using the suspension column, they do not need to be clamped and fixed as in existing technologies. In the above technical solution, the support component can support the insulators on the straight or angled brackets. After assembly, the suspension column bracket structure can be easily and quickly removed from the suspension column bracket assembly unit, further improving installation efficiency.

[0015] As a further improvement, the frame is fixedly provided with an inclined or vertical mounting plate, and the mounting plate is provided with an L-shaped adjustment plate. The adjustment plate includes a first plate and a second plate. The first plate is used to fix the support member, and one end of the second plate is hinged to the corresponding mounting plate. The mounting plate is provided with an adjustment structure for adjusting the angle of the second plate.

[0016] The beneficial effect is that the adjustment plate in the above technical solution can rotate on the mounting plate with its hinge point as the center. After the adjustment plate is rotated to the required angle, it is fixed by the adjustment structure, which can adapt to the installation of straight or oblique carousels at different angles.

[0017] As a further improvement, the support member has a V-shaped structure.

[0018] The beneficial effects are: the support component in the above technical solution can be adapted to insulators on straight and oblique arms of different diameters, and is easy to manufacture.

[0019] As a further improvement, the frame is tilted on one side for mounting the straight wrist arm positioning device and the oblique wrist arm positioning device, so that the oblique wrist arm positioning device is located obliquely below the straight wrist arm positioning device.

[0020] The beneficial effects are as follows: In the above technical solution, the force exerted by the straight and oblique cantilever arms on the support can be decomposed into two parts: one parallel to the frame and the other perpendicular to the frame. Therefore, in the above technical solution, the cantilever arm and cantilever structure can be closely attached to the frame under the action of gravity. On the one hand, this can ensure the stability of the cantilever arm and cantilever structure during the assembly process. On the other hand, the frame can also be used to share part of the weight of the cantilever arm and cantilever structure, reducing the load on the support.

[0021] As a further improvement, the straight arm positioning device, the inclined arm positioning device, and the hanging column positioning device are provided in two sets, and the two sets are arranged symmetrically.

[0022] The beneficial effects are: the cantilever arms in the assembled cantilever structure can face different directions according to different installation requirements, without the need to change the direction of the cantilever structure after assembly, making it flexible to use and ensuring installation efficiency.

[0023] To achieve the above objectives, the technical solution of the hanging column bracket installation method provided by the present invention is as follows:

[0024] A method for installing a hanging column cantilever arm involves assembling the hanging column cantilever arm structure before installation. During assembly, the inclined cantilever arm is directly installed below or diagonally below the straight cantilever arm, thereby making the hanging column cantilever arm structure vertical or nearly vertical.

[0025] The beneficial effects are: the above technical solution is a further improvement on the existing technology. This solution allows the cantilever structure of the hanging column to be directly in a vertical or near-vertical position after assembly, facilitating subsequent overall installation work, simplifying operation, and effectively improving the installation efficiency of the cantilever structure.

[0026] As a further improvement, the lifting column is positioned and fixed before assembling the straight and angled arms, and then the straight and angled arms are installed, using the lifting column to position the straight and angled arms.

[0027] The beneficial effects are: In the above technical solution, after the hanging column is installed first, the straight arm and the inclined arm can be positioned using the hanging column, so that there is no need for clamping and positioning structures to fix and position the straight arm and the inclined arm, thereby improving the assembly efficiency of the hanging column arm structure. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the hanging column bracket in the background art of this invention;

[0029] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the cantilever arm installation device of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the column-arm mounting robot in Embodiment 1 of the column-arm mounting device of the present invention;

[0031] Figure 4 This is a schematic diagram of the mechanical arm of the hanging column wrist arm robot in Embodiment 1 of the hanging column wrist arm installation device of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the cantilever assembly unit of Embodiment 1 of the cantilever mounting device of the present invention;

[0033] Figure 6 This is a diagram showing the assembled state of the cantilever structure of Embodiment 1 of the cantilever installation device of the present invention;

[0034] Figure 7 This is a schematic diagram of the installation process of the cantilever structure in Embodiment 1 of the cantilever installation device of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Hanging column; 2. Straight cantilever arm; 3. Angled cantilever arm; 4. Mounting base; 5. Walking chassis; 6. Aerial work platform; 7. Hanging column cantilever arm installation robot; 71. Robotic arm; 72. Second slewing device; 73. Second lifting arm; 74. Rotating upper arm; 75. Rotating lower arm; 76. Second pitching arm; 77. Left and right swing arm; 78. Third slewing device; 8. Hanging column cantilever arm assembly unit; 81. Base frame; 82. Slide rail; 83. Frame body; 831. Vertical frame; 832. Angled frame; 84. Straight cantilever arm positioning device; 841. Mounting plate; 842. Adjusting plate; 843. Support component; 85. Angled cantilever arm positioning device; 86. Hanging column positioning device; 9. Power-assisted robotic arm. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] The present invention will be further described in detail below with reference to the embodiments.

[0039] Specific embodiment 1 of the hanging column bracket installation device provided by the present invention:

[0040] In this embodiment, the cantilever assembly unit is used to pre-assemble the cantilever structure, and the cantilever installation robot is used to install the assembled cantilever structure as a whole, which effectively improves the installation efficiency. In addition, the aerial work platform can provide a safe working space for the workers and ensure their safety.

[0041] See appendix Figure 2 A cantilever arm installation device for a suspended column includes a traveling chassis 5, on which a high-altitude work platform 6, a cantilever arm installation robot 7, a cantilever arm assembly unit 8, and a power-assisted robotic arm 9 are mounted.

[0042] The walking chassis 5 has a walking function and can also provide a power source for the aerial work platform 6, the suspended column boom installation robot 7, and the power-assisted robotic arm 9 mounted on it. The aerial work platform 6 and the power-assisted robotic arm 9 are existing technologies and will not be described in detail here.

[0043] See appendix Figure 3 and attached Figure 4The hanging column arm installation robot 7 includes a robotic arm and a robotic hand 71. The robotic arm includes a second rotating device 72 fixedly mounted on a walking chassis 5. A second lifting arm 73 is mounted on the second rotating device 72. A large rotating arm 74 is mounted on the upper end of the second lifting arm 73. A small rotating arm 75 is mounted on the end of the large rotating arm 74 away from the second lifting arm 73. A second pitch arm 76 is mounted on the end of the small rotating arm 75 away from the large rotating arm 74. A left and right swing arm 77 is mounted on the second pitch arm 76. A third rotating device 78, which can rotate in a vertical plane, is mounted on the end of the left and right swing arm 77 away from the second pitch arm 76. The robotic hand 71 is mounted on the third rotating device 78 and is used to grasp the hanging column 1 and transfer the hanging column 1's arm structure to the installation position. The robotic arm 71 is equipped with a vision camera, which guides the pendant arm installation robot 7 in spatial movement. This allows the robotic arm 71 to align the mounting holes on the mounting base 4 of the pendant 1 with the bolts used to install the pendant 1, and to insert the bolts into the corresponding mounting holes. The pendant arm robot in this embodiment is essentially a highly flexible handling device, which is existing technology and will not be described in detail here.

[0044] See appendix Figure 5 and attached Figure 6 The hanging column cantilever assembly unit 8 includes a base frame 81, on which two parallel slide rails 82 are provided. A frame body 83 is provided above the base frame 81, and a slider that slides in cooperation with the corresponding slide rail 82 is provided on the lower side of the frame body 83 so that the frame body 83 can slide horizontally.

[0045] The frame 83 includes an upright frame 831 and a diagonal frame 832. The upright frame 831 is located on a vertical plane and is perpendicular to the base frame 81. The upper end of the diagonal frame 832 is fixedly connected to the upper part of the upright frame 831, and the diagonal frame 832 and the upright frame 831 form an acute angle. Two straight arm positioning devices 84 and a diagonal arm positioning device 85 are provided on the side of the diagonal frame 832 away from the upright frame 831. The two diagonal arm positioning devices 85 are located below the two straight arm positioning devices 84.

[0046] The straight arm positioning device 84 and the inclined arm positioning device 85 have similar structures, both including a mounting plate 841 fixedly connected to the inclined frame 832. An adjusting plate 842 with an L-shaped cross-section is provided on the mounting plate 841, and a V-shaped support member 843 is fixedly provided on the adjusting plate 842. The opening of the support member 843 faces upwards to support the insulator on the straight arm 2 or the inclined arm 3. The adjusting plate 842 includes a first plate and a second plate that are perpendicular to each other. The first plate is used to fix the support member 843, and one end of the second plate is hinged to the corresponding mounting plate 841. The adjusting plate 842 can rotate on the mounting plate 841 with its hinge point as the center, thereby changing the angle between the adjusting plate 842 and the support member 843 to accommodate the installation of the straight arm 2 or the inclined arm 3 at different angles. An adjustment structure is provided between the other end of the second plate and the mounting plate 841 for fixing the adjusting plate 842 to the mounting plate 841 after rotation.

[0047] The adjustment structure in this embodiment includes an arc-shaped guide rail fixedly mounted on the mounting plate 841. A fastening bolt is guided along the arc-shaped guide rail on the second plate. A bolt hole is provided on the second plate for the head of the fastening bolt to pass through. A hand-tightening nut for fastening the arc-shaped guide rail and the mounting plate 841 is threaded onto the head of the fastening bolt. In other embodiments, the arc-shaped guide rail may be omitted, and multiple adjustment holes for the fastening bolts to pass through may be provided on the mounting plate 841. Depending on the requirements, the fastening bolts can be installed in different adjustment holes, thereby achieving adjustment of the angle of the adjustment plate 842.

[0048] The difference between the straight wrist arm positioning device 84 and the oblique wrist arm positioning device 85 lies in the different angles of the adjusting plate 842. The adjusting plate 842 in the straight wrist arm positioning device 84 is set horizontally, while the adjusting plate 842 in both oblique wrist arm positioning devices 85 is set at an angle.

[0049] Two column positioning devices 86 are fixedly installed on both sides of the inclined frame 832. In this embodiment, the column positioning device 86 is a column clamp for clamping and fixing the column 1. The specific structure of the column clamp is prior art and will not be described in detail here. In this embodiment, the straight arm positioning device 84, the inclined arm positioning device 85, and the column positioning device 86 on both sides of the inclined frame 832 are mirror images of each other, so that the column arm structure can be assembled on both sides of the inclined frame 832.

[0050] When assembling the cantilever arm structure, straight cantilever arm positioning device 84, oblique cantilever arm positioning device 85, and cantilever arm positioning device 86 on the same side are used. First, the mounting base 4 of the cantilever arm 1 is placed upwards, so that the cantilever arm 1 is fixed by the cantilever arm 1 clamp. Then, the straight cantilever arm 2 and oblique cantilever arm 3 are placed on the straight cantilever arm positioning device 84 and oblique cantilever arm positioning device 85, respectively. At this time, since the cantilever arm 1 has been fixed, the cantilever arm 1 can position the ends of the straight cantilever arm 2 and oblique cantilever arm 3 near the cantilever arm 1. Therefore, the straight cantilever arm 2 and oblique cantilever arm 3 do not need to be fixed and clamped, but only placed on the corresponding support 843 to ensure that they will not fall off. After assembling the straight cantilever arm 2, oblique cantilever arm 3, and cantilever arm 1, the cantilever arm 1 clamp is opened, and the cantilever arm structure can be directly removed from the cantilever arm assembly unit 8, which is convenient to operate.

[0051] See appendix Figure 7 During construction, workers first use the assistive robotic arm 9 to transfer the suspended column 1, straight cantilever arm 2, and inclined cantilever arm 3 to the suspended column cantilever assembly unit 8, and then assemble the suspended column cantilever structure. After assembly, the suspended column cantilever installation robot 7 grabs the upper part of the suspended column 1 and moves it to the installation position. Workers can then stand in the work basket 64 of the aerial work platform 6 to install the suspended column 1. In other embodiments, a nut-tightening device can be installed on the suspended column cantilever installation robot 7 to automatically install the suspended column 1. Finally, after the suspended column 1 is installed, workers can also check and adjust the installation status of the suspended column 1 on the aerial work platform 6.

[0052] The cantilever arm installation equipment in this embodiment allows workers to pre-assemble the cantilever arm structure, greatly improving the efficiency of assembly and installation. It also provides a safe working space for workers, ensuring their safety.

[0053] Specific embodiment 2 of the hanging column bracket installation device provided by the present invention:

[0054] This embodiment provides another structure for the hanging column cantilever assembly unit. The difference from Embodiment 1 is that in this embodiment, the straight cantilever positioning device and the oblique cantilever positioning device are a straight cantilever clamp and an oblique cantilever clamp, respectively. When assembling the hanging column cantilever structure, the straight cantilever and the oblique cantilever are first fixedly installed on the hanging column cantilever assembly unit, and the straight cantilever and the oblique cantilever are positioned.

[0055] In this embodiment, no column positioning device is set. After fixing and positioning the straight arm and the inclined arm, the column is hoisted to the straight arm and the inclined arm, and then the column is directly fixedly connected to the straight arm and the inclined arm.

[0056] Specific embodiment 3 of the hanging column bracket installation device provided by the present invention:

[0057] This embodiment provides another structure for the support member. The difference from Embodiment 1 is that the support member in this embodiment is a U-shaped structure, and the two side walls of the support member are parallel to each other.

[0058] Specific embodiment 4 of the hanging column bracket installation device provided by the present invention:

[0059] This embodiment provides another structure for the frame, which differs from Embodiment 1 in that the frame in this embodiment only includes an upright frame and does not include a diagonal frame. In this embodiment, the diagonal arm positioning device is located directly below the straight arm positioning device.

[0060] Specific embodiment 5 of the hanging column bracket installation device provided by the present invention:

[0061] This embodiment provides another structure for the hanging column cantilever assembly unit. The difference from embodiment 1 is that in this embodiment, only one set of straight cantilever positioning device, oblique cantilever positioning device and hanging column positioning device is set on one side of the frame.

[0062] Specific embodiment 6 of the hanging column bracket installation device provided by the present invention:

[0063] This embodiment provides another structure for the frame. The difference from Embodiment 1 is that the frame in this embodiment is a quadrangular prism structure. Straight bracket positioning devices, oblique bracket positioning devices, and hanging column positioning devices are installed on all four sides of the frame, so that the hanging column bracket structure can be assembled in different directions.

[0064] Specific embodiment 7 of the hanging column bracket installation device provided by the present invention:

[0065] This embodiment provides another structure for the frame. The difference from Embodiment 1 is that no slide rail is provided in this embodiment, and the frame is directly fixedly connected to the base frame.

[0066] Specific embodiment 1 of the hanging column bracket installation method provided by the present invention:

[0067] The installation method of the cantilever boom is divided into an assembly process and an installation process. The assembly process is carried out first during operation.

[0068] The assembly process involves the pre-assembly of the cantilever structure. First, the cantilever is hoisted upwards to the assembly station, and then positioned and fixed in this state. Next, the straight and angled cantilever arms are hoisted to their corresponding positions. At this point, the straight and angled cantilever arms can be positioned using the cantilever as a reference, so they do not need to be fixed separately. Finally, the straight and angled cantilever arms, as well as the cantilever, are fixed together using connectors to form the cantilever structure.

[0069] The installation process involves the overall installation of the cantilever structure of the hanging column. First, the upper part of the hanging column is grabbed using a handling device and the cantilever structure is transferred to the installation position. Then, the bolts on the embedded parts are passed through the mounting holes on the mounting base of the hanging column. Finally, the workers install the bolts that mate with the bolts onto the bolts and tighten them to complete the overall installation of the cantilever structure of the hanging column.

[0070] Specific embodiment 2 of the hanging column bracket installation method provided by the present invention:

[0071] The difference from Embodiment 1 is that in this embodiment, the straight arm and the inclined arm are first hoisted to the corresponding work positions and then fixedly connected before the installation of the hanging column is carried out.

[0072] Specific embodiment 3 of the hanging column bracket installation method provided by the present invention:

[0073] The difference from Embodiment 1 is that the transport device in this embodiment is equipped with a device for installing and tightening nuts, which can be used to automatically install the cantilever structure of the hanging column.

[0074] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cantilever arm installation device for a suspended column, comprising a frame (83), wherein a straight cantilever arm positioning device (84) and a diagonal cantilever arm positioning device (85) are provided on the frame (83), characterized in that, The straight arm positioning device (84) and the oblique arm positioning device (85) are arranged vertically. The oblique arm positioning device (85) is located directly below or obliquely below the straight arm positioning device (84). At least one hanging column positioning device (86) is provided on the frame (83). The hanging column positioning device (86) is used to position and fix the hanging column. The position of the hanging column positioning device satisfies that the hanging column is coplanar with the straight arm and the oblique arm when in use, and the hanging column can dock with the straight arm and the oblique arm on the side of the opening of the straight arm and the oblique arm.

2. The bracket arm installation device according to claim 1, characterized in that, Both the straight arm positioning device (84) and the oblique arm positioning device (85) include a support member (843) with an upward opening for supporting the insulator of the straight arm or oblique arm.

3. The bracket arm installation device according to claim 2, characterized in that, An inclined or vertical mounting plate (841) is fixedly installed on the frame (83). An L-shaped adjusting plate (842) is provided on the mounting plate (841). The adjusting plate (842) includes a first plate and a second plate. The first plate is used to fix the support member (843). One end of the second plate is hinged to the corresponding mounting plate (841). The mounting plate (841) is provided with an adjusting structure for adjusting the angle of the second plate.

4. The bracket arm installation device according to claim 2, characterized in that, The support component (843) has a V-shaped structure.

5. The bracket arm installation device according to claim 2, characterized in that, The frame (83) is tilted on one side for mounting the straight carpal positioning device (84) and the oblique carpal positioning device (85), so that the oblique carpal positioning device (85) is located obliquely below the straight carpal positioning device (84).

6. The bracket arm installation device according to claim 1, characterized in that, The straight arm positioning device (84), the oblique arm positioning device (85), and the hanging column positioning device (86) are provided in two sets and the two sets are arranged symmetrically.

7. A method for installing a cantilever arm on a suspension column, characterized in that, Before installation, the cantilever structure of the hanging column is first assembled. During assembly, the inclined cantilever is directly installed below or diagonally below the straight cantilever, so that the cantilever structure of the hanging column is in a vertical or nearly vertical state. Before assembling the straight and inclined cantilever, the hanging column is positioned and fixed, and then the straight and inclined cantilever are installed, using the hanging column to position the straight and inclined cantilever.

Images