Bridge pier construction step ladder attachment device

Abstract

This invention relates to an attachment device for a bridge pier construction staircase, belonging to the field of bridge construction technology. The device includes a frame system comprising four tubes fixedly connected end-to-end. A fifth tube is connected at both ends to the second and fourth tubes and can slide along its length; a sixth tube is connected at both ends to the first and third tubes and can slide along its length; a first telescopic device is connected at both ends to the third and fifth tubes, and its expansion and contraction pushes the fifth tube to slide along the second and fourth tubes; a second telescopic device is connected at both ends to the first and third tubes, and its expansion and contraction pushes the sixth tube to slide along the first and third tubes; a connecting structure connects one end to the frame system and the other end to a safety staircase, thus securing the safety staircase. The device provided by this invention is simple to install and dismantle, saves time and labor, provides strong and reliable attachment, has strong applicability, and is reusable.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically a bridge pier construction ladder attachment device. Background Technology

[0002] During bridge pier construction, ladders are needed to facilitate personnel movement. For ladders exceeding 5 meters in height, they must be attached and fixed to the pier to ensure stability. Traditionally, embedded parts are installed before concrete pouring, and then used for attachment. This method has several drawbacks: ① Embedded parts are embedded in the concrete, making removal time-consuming and labor-intensive, and improper handling can affect the appearance; ② Shallow embedding results in poor attachment stability; deep embedding increases the difficulty of later removal; ③ Embedded parts are reused, leading to material waste and increased costs. This invention eliminates the need for embedded parts, simplifying installation and removal, providing a secure and reliable fixation, and preserving the appearance of the pier concrete. This invention is applicable to piers of various cross-sectional shapes, offering strong applicability, and is reusable. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a bridge pier construction ladder attachment device, which features simple installation and dismantling, time and labor saving, firm and reliable attachment, strong applicability, and reusability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bridge pier construction ladder attachment device includes a frame system, a first expansion mechanism, a second expansion mechanism, and a connecting structure, wherein:

[0006] The overall outline of the frame system is rectangular, including a first type tube, a second type tube, a third type tube, and a fourth type tube that are fixedly connected end to end. The two ends of the fifth type tube are movably connected to the second type tube and the fourth type tube, respectively, and can slide along the length direction of the second type tube and the fourth type tube. The two ends of the sixth type tube are movably connected to the first type tube and the third type tube, respectively, and can slide along the length direction of the first type tube and the third type tube.

[0007] The two ends of the first telescopic device are connected to the third type tube and the fifth type tube respectively. The telescopic deformation of the first telescopic device pushes the fifth type tube to slide along the second type tube and the fourth type tube to a suitable position.

[0008] The two ends of the second telescopic device are connected to the first type tube and the third type tube respectively. The telescopic deformation of the second telescopic device pushes the sixth type tube to slide along the first type tube and the third type tube to a suitable position.

[0009] One end of the connection structure connects to the frame system, and the other end is used to connect to the safety ladder, thereby fixing the safety ladder.

[0010] Furthermore, in the bridge pier construction ladder attachment device mentioned above, the two ends of the first type of pipe, the second type of pipe, the third type of pipe and the fourth type of pipe are fixedly connected by U-bolts.

[0011] Furthermore, in the bridge pier construction ladder attachment device mentioned above, the second and fourth type tubes have grooves on one side, and the fifth type tube has tenons at both ends, which can be inserted into the grooves and slide along the grooves.

[0012] Furthermore, the bridge pier construction ladder attachment device mentioned above, the sixth type of pipe includes two strip pipes arranged parallel to each other, and the two strip pipes are connected into one piece by a screw.

[0013] Furthermore, the bridge pier construction ladder attachment device mentioned above includes a first telescopic device comprising a first scissor jack and a movable sleeve and a first fixed sleeve respectively fixed at the upper and lower ends of the first scissor jack. The movable sleeve is fitted onto the fifth type of pipe, and the first fixed sleeve is fitted onto the third type of pipe.

[0014] Furthermore, in the bridge pier construction ladder attachment device mentioned above, bolts are provided on the side of the first fixing sleeve. By tightening the bolts, the first fixing sleeve can be locked onto the third type of tube.

[0015] Furthermore, the bridge pier construction ladder attachment device mentioned above includes a second telescopic device comprising a second scissor jack and a U-shaped slot and a second fixing sleeve fixed at the upper and lower ends of the second scissor jack. The U-shaped slot is fastened to the sixth type of pipe, and the second fixing sleeve is fitted onto the fourth type of pipe.

[0016] Furthermore, in the bridge pier construction ladder attachment device mentioned above, a bolt is provided on one side of the second fixing sleeve. By tightening the bolt, the second fixing sleeve can be locked onto the fourth type of tube.

[0017] Furthermore, in the bridge pier construction ladder attachment device described above, the movable sleeve and the first fixed sleeve are respectively welded to the upper and lower ends of the first scissor jack; the U-shaped groove and the second fixed sleeve are respectively welded to the upper and lower ends of the second scissor jack.

[0018] Furthermore, the bridge pier construction ladder attachment device mentioned above has a connecting structure including two parallel connecting rods. One end of the two connecting rods is connected to a fourth-type pipe, and the other end is used to connect to the safety ladder.

[0019] The advantages of using the bridge pier construction ladder attachment device provided by this invention are as follows:

[0020] (1) Compared with traditional attachment devices, this device does not require the installation of embedded parts, will not affect the appearance quality of concrete, and avoids the trouble of post-processing embedded parts.

[0021] (2) Using stainless steel rectangular tubes can avoid contamination of the concrete surface of the pier column and ensure the appearance quality of the concrete.

[0022] (3) This device uses bolt connection, which is convenient to install and dismantle, and can be reused multiple times, saving construction costs;

[0023] (4) Connection and fixing holes are provided on the rectangular tube at certain intervals, which can be selected according to the size of the pier column, making it convenient to adjust the size of the device;

[0024] (5) It adopts a hand-cranked jack, which is easy to adjust and simple to operate;

[0025] (6) The size of this device can be adjusted as needed, and it is applicable to cylindrical and square piers of different sizes, making it highly practical. Attached Figure Description

[0026] Figure 1 This invention provides a schematic diagram of a bridge pier construction ladder attachment device.

[0027] Figure 2 for Figure 1 A schematic diagram of the framework system;

[0028] Figures 3-8 These are schematic diagrams of the various rectangular tubes in the frame system;

[0029] Figure 9 This is a structural diagram of a U-bolt;

[0030] Figures 10-11 for Figure 1 A schematic diagram of the structure of the first telescopic device;

[0031] Figures 12-13 for Figure 1 A schematic diagram of the structure of the second telescopic device;

[0032] In the diagram: 1-Frame system; 2-First telescopic device; 3-Second telescopic device; 4-Connecting structure;

[0033] 11-Type I tube, 12-Type II tube, 13-Type III tube, 14-Type IV tube, 15-Type V tube, 16-Type VI tube; 111, 112, 121, 123, 131, 132, 141, 143-Bolt holes; 122, 142-Slide grooves; 151, 152-Tongues; 161, 162-Threaded rods; 163, 164-Strip tubes; 17-U-bolt;

[0034] 21-Modible sleeve; 22-First scissor jack; 23-First fixed sleeve; 221-First jack support; 222-First jack lever; 231-Nut; 232-Bolt;

[0035] 31-U-shaped slot; 32-Second scissor jack; 33-Second fixed sleeve; 321-Second jack bracket; 322-Second jack rocker arm; 331-Nut; 332-Bolt;

[0036] 41, 42 - Connecting rods. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] See Figure 1 As shown, the present invention provides a bridge pier construction ladder attachment device applied to a bridge pier. It includes a frame system 1, a first expansion joint 2, a second expansion joint 3, and a connecting structure 4. The overall outline of the frame system 1 is rectangular. The first expansion joint 2 and the second expansion joint 3 are connected to the frame system 1 and can slide in two directions along the frame system 1 respectively. In use, the frame system 1 is placed around the bridge pier, and the ladder is fixed to the attachment device via the connecting structure 4. Wherein:

[0039] See Figure 2 As shown, the frame system 1 consists of six tubes, wherein the first tube 11, the second tube 12, the third tube 13 and the fourth tube 14 are fixedly connected end to end to form a rectangular frame; the two ends of the fifth tube 15 are movably connected to the second tube 12 and the fourth tube 14 respectively and can slide along the length direction of the second tube 12 and the fourth tube 14; the two ends of the sixth tube 16 are movably connected to the first tube 11 and the third tube 13 respectively and can slide along the length direction of the first tube 11 and the third tube 13.

[0040] See Figure 3-8 As shown, specifically, the first type of tube 11 has bolt holes 111 and 112 at both ends; the second type of tube 12 has bolt holes 121 and 123 at both ends and a sliding groove 122 on one side; the third type of tube 13 has bolt holes 131 and 132 at both ends; the fourth type of tube 14 has bolt holes 141 and 143 at both ends and a sliding groove 142 on one side; the fifth type of tube 15 has tenons 151 and 152 at both ends, which can be inserted into the sliding grooves of the second type of tube 12 and the fourth type of tube 14 and slide along the sliding grooves; the sixth type of tube 16 is composed of two strip tubes 163 and 164, which are connected by two screws 161 and 162.

[0041] In this embodiment, the two ends of the first type tube 11, the second type tube 12, the third type tube 13, and the fourth type tube 14 are fixed with U-bolts 17. (See reference...) Figure 9 As shown.

[0042] In this embodiment, all tubes have rectangular cross-sections with dimensions of 50mm long side, 30mm short side, and 4mm wall thickness.

[0043] See Figures 10-11 As shown, the first telescopic device 2 consists of a first scissor jack 22, a movable sleeve 21, and a first fixed sleeve 23. The movable sleeve 21 and the first fixed sleeve 23 are respectively fixed to the upper and lower ends of the first scissor jack 22. The first telescopic device 2 can slide along the third type tube 13 and the fifth type tube 15 through the movable sleeve 21 and the first fixed sleeve 23. A hole is opened on one side of the first fixed sleeve 23, and a nut 231 is welded to the hole. Tightening the bolt 232 can lock the first fixed sleeve 23 onto the third type tube 13.

[0044] In this embodiment, the movable sleeve 21 and the first fixed sleeve 23 are respectively welded to the upper and lower ends of the first scissor jack 22.

[0045] In this embodiment, both the movable sleeve 21 and the first fixed sleeve 23 are rectangular tubes with a cross-sectional dimension of 60mm on the long side, 40mm on the short side, and 4mm on the wall thickness.

[0046] See Figures 12-13 As shown, the second telescopic device 3 consists of a second scissor jack 32, a U-shaped groove 31, and a second fixed sleeve 33. The U-shaped groove 31 and the second fixed sleeve 33 are respectively fixed to the upper and lower ends of the second scissor jack 32. The U-shaped groove 31 can be snapped onto the sixth type tube 16. The second telescopic device 3 can slide along the fourth type tube 14 and the sixth type tube 16 through the U-shaped groove 31 and the second fixed sleeve 33. A hole is opened on one side of the second fixed sleeve 33, and a nut 331 is welded to the hole. Tightening the bolt 332 can lock the second fixed sleeve 33 onto the fourth type tube 14.

[0047] In this embodiment, the U-shaped slot 31 and the second fixed sleeve 33 are respectively welded to the upper and lower ends of the second scissor jack 32.

[0048] In this embodiment, the second fixing sleeve 33 is a rectangular tube with a cross-sectional dimension of 60mm long side, 40mm short side, and 4mm wall thickness.

[0049] The installation and usage process of the attachment device for the bridge pier safety ladder of the present invention is as follows:

[0050] (1) Insert the third type tube 13 and the fifth type tube 15 into the first fixed sleeve 23 and the movable sleeve 21 at both ends of the first telescopic device 2 respectively. According to the size of the pier column, move the first telescopic device 2 to the designated position and tighten the bolt 232 to fix the first telescopic device 2 and the third type tube 13.

[0051] (2) Insert the fourth type tube 14 into the second fixed sleeve 33 of the second telescopic device 3, and clamp the fifth type tube 15 into the U-shaped slot 31. According to the size of the pier column, move the second telescopic device 3 to the designated position and tighten the bolt 332 to fix the second telescopic device 3 and the fourth type tube 14.

[0052] (3) Insert the tenons at both ends of the fifth type tube 15 into the grooves of the second type tube 12 and the fourth type tube 14 respectively, and then assemble them together with the first type tube 11, the third type tube 13 and the fifth type tube 15, and fix the ends firmly with U-bolts 17.

[0053] (4) The attachment device is hoisted as a whole and placed at the designated position on the pier;

[0054] (5) Rotate the rocker arm 222 of the first scissor jack 22 to lift the first jack support 221 and push the fifth type tube 15 along the slide until it is locked with the pier column;

[0055] (6) Rotate the rocker arm 322 of the second scissor jack 32 to lift the second jack support 321 and push the sixth type tube 16 to move along the first type tube 11 and the third type tube 13 until it is locked with the pier column.

[0056] (7) Install connecting rods 41 and 42 and fix them to the ladder. This completes the installation of the attachment device.

[0057] (8) When dismantling, first rotate the rocker arm 322 of the second scissor jack 32 to retract the second jack support 321, and then rotate the rocker arm 222 of the first scissor jack 22 to retract the first jack support 221.

[0058] (9) Remove the connecting rod 41, connecting rod 42, first type tube 11 and fourth type tube 14, third type tube 13 and fourth type tube 14 fixing U bolts 17 in sequence, then remove the fourth type tube 14, sixth type tube 16 and second telescopic device 3 as a whole, and finally lift and remove the remaining part as a whole.

[0059] The bridge pier safety ladder attachment device provided by this invention, compared with traditional attachment devices, does not require embedded parts, does not affect the appearance quality of concrete, and avoids the trouble of later processing of embedded parts; it uses stainless steel rectangular tubes, which can avoid contamination of the concrete surface of the pier and ensure the appearance quality of concrete; the device uses bolt connections, which are convenient for installation and dismantling, can be reused multiple times, and saves construction costs; the rectangular tubes are provided with connection and fixing holes at certain intervals, which can be selected according to the size of the pier and make it easy to adjust the size of the device; it uses a hand-cranked jack, which is easy to adjust and simple to operate; the size of the device can be adjusted as needed, and it is applicable to cylindrical piers and square piers of different sizes, making it highly practical.

[0060] The above embodiments are merely illustrative examples of the present invention and not all embodiments. The present invention may also be implemented in other specific ways or forms without departing from the spirit or essential characteristics of the invention. Therefore, the described embodiments should be considered illustrative rather than limiting in any respect. The scope of the invention should be defined by the appended claims, and any variations equivalent to the intent and scope of the claims should also be included within the scope of the invention.

Claims

1. A bridge pier construction ladder attachment device, characterized in that, The device includes a frame system, a first telescopic mechanism, a second telescopic mechanism, and a connecting structure, wherein: The overall outline of the frame system is rectangular, including a first type tube, a second type tube, a third type tube, and a fourth type tube that are fixedly connected end to end. The two ends of the fifth type tube are movably connected to the second type tube and the fourth type tube, respectively, and can slide along the length direction of the second type tube and the fourth type tube. The two ends of the sixth type tube are movably connected to the first type tube and the third type tube, respectively, and can slide along the length direction of the first type tube and the third type tube. The two ends of the first telescopic device are respectively connected to the third type tube and the fifth type tube. The telescopic deformation of the first telescopic device pushes the fifth type tube to slide along the second type tube and the fourth type tube to a suitable position. The first telescopic device includes a first scissor jack and a movable sleeve and a first fixed sleeve respectively fixed at the upper and lower ends of the first scissor jack. The movable sleeve is sleeved on the fifth type tube, and the first fixed sleeve is sleeved on the third type tube, so that the first telescopic device can slide along the third type tube and the fifth type tube through the movable sleeve and the first fixed sleeve. The two ends of the second telescopic device are respectively connected to the first type tube and the third type tube. The telescopic deformation of the second telescopic device pushes the sixth type tube to slide along the first type tube and the third type tube to a suitable position. The second telescopic device includes a second scissor jack and a U-shaped groove and a second fixed sleeve fixed at the upper and lower ends of the second scissor jack. The U-shaped groove is fastened to the sixth type tube, and the second fixed sleeve is sleeved on the fourth type tube, so that the second telescopic device can slide along the fourth type tube and the sixth type tube through the U-shaped groove and the second fixed sleeve. One end of the connection structure is connected to the frame system, and the other end is used to connect to the safety ladder, thereby fixing the safety ladder.

2. The bridge pier construction ladder attachment device according to claim 1, characterized in that, The two ends of the first type tube, the second type tube, the third type tube, and the fourth type tube are fixedly connected by U-bolts.

3. The bridge pier construction ladder attachment device according to claim 1, characterized in that, The second and fourth types of tubes each have a groove on one side, and the fifth type of tube has tenons at both ends, which can be inserted into the groove and slide along the groove.

4. The bridge pier construction ladder attachment device according to any one of claims 1-3, characterized in that, The sixth type of tube includes two strip tubes arranged parallel to each other, and the two strip tubes are connected into one piece by a screw.

5. The bridge pier construction ladder attachment device according to claim 1, characterized in that, A bolt is provided on the side of the first fixing sleeve, and the first fixing sleeve can be locked onto the third type of tube by turning the bolt.

6. The bridge pier construction ladder attachment device according to claim 1, characterized in that, A bolt is provided on one side of the second fixing sleeve, and the second fixing sleeve can be locked onto the fourth type of tube by turning the bolt.

7. The bridge pier construction ladder attachment device according to claim 1 or 6, characterized in that, The movable sleeve and the first fixed sleeve are respectively welded to the upper and lower ends of the first scissor jack; the U-shaped groove and the second fixed sleeve are respectively welded to the upper and lower ends of the second scissor jack.

8. The bridge pier construction ladder attachment device according to claim 1, characterized in that, The connection structure includes two parallel connecting rods, one end of which is connected to the fourth type of tube, and the other end is used to connect to the safety ladder.

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