A hoist for prefabricated building prefabricated stair construction

Abstract

This utility model provides a lifting tool for the construction of prefabricated stairs in assembled buildings, including a lifting plate, lifting rings, a limiting device, and a straightening device. The limiting device includes a sliding mechanism, a clamping mechanism, and a driving mechanism. The sliding mechanism is located at the lower part of the lifting plate. The clamping mechanism includes a left clamping member and a right clamping member, which are respectively located on both sides of the lower part of the lifting plate via the sliding mechanism. The driving mechanism is connected to the sliding mechanism and drives the left and right clamping members to clamp and release the stairs through the sliding mechanism. The straightening device includes a straightening mechanism and an execution mechanism. The straightening mechanism includes a left straightening member and a right straightening member. The driving mechanism drives the left and right straightening members to move inward synchronously through the execution mechanism to straighten and center the stairs. This lifting tool can straighten and adjust the position of the stairs, keeping them in a stable, centered clamped state, ensuring the stability of the stairs during hoisting, and improving installation accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of construction hoisting tools, specifically to a hoisting tool for constructing prefabricated stairs in prefabricated buildings. Background Technology

[0002] With the rapid development of industrialized construction, prefabricated building technology has been widely applied in modern engineering construction. As an important component of prefabricated buildings, prefabricated stairs are being used more and more frequently. During the construction of prefabricated stairs, the fabrication, prestressing, and maintenance of the stairs are completed in the factory, and then they are directly transported to the construction site for installation. Because prefabricated stairs are usually large and have special shapes, they need to be lifted and transported to the installation location using specialized lifting equipment.

[0003] However, traditional prefabricated stair hoisting equipment has shortcomings in practical applications. During hoisting, prefabricated stairs are prone to swaying and tilting, causing the stairs to shift position and affecting installation accuracy; in severe cases of swaying, they may even fall, causing damage to the stair structure, delaying construction progress, and increasing project costs. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, a hoisting tool for constructing prefabricated staircases in prefabricated buildings is provided. This tool can adjust the position of the staircase, keeping it centered and clamped, ensuring its stability during hoisting, and improving installation accuracy and efficiency.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a hoisting tool for the construction of prefabricated stairs in prefabricated buildings, including a hanging plate, a hanging ring fixed to the upper part of the hanging plate, a limiting device, and a straightening device; the limiting device includes a sliding mechanism, a clamping mechanism, and a driving mechanism, the sliding mechanism is located at the lower part of the hanging plate, the clamping mechanism includes a left clamping member and a right clamping member, the left and right clamping members are respectively located on both sides of the lower part of the hanging plate through the sliding mechanism, the driving mechanism is connected to the sliding mechanism, and the driving mechanism drives the left and right clamping members to clamp and release the stairs through the sliding mechanism; the straightening device includes a straightening mechanism and an execution mechanism, the straightening mechanism includes a left straightening member and a right straightening member, the left and right straightening members are respectively located on the outside of the left and right clamping members, the execution mechanism is connected to the left and right straightening members and the driving mechanism, and the driving mechanism drives the left and right straightening members to move inward synchronously through the execution mechanism to straighten and center the stairs.

[0006] According to the above technical solution, the sliding mechanism includes a movable plate and a movable block. The suspended plate has two parallel sliding grooves. The movable plate is slidably embedded in the sliding grooves, and the movable block is fixed below the movable plate.

[0007] According to the above technical solution, both the left and right clamping components include two support rods fixed below the movable block, an mounting plate is fixed between the two support rods, and a placement plate is fixed to the inner side of the bottom of the support rod.

[0008] According to the above technical solution, the driving mechanism includes a driving source and two bidirectional lead screws. The two bidirectional lead screws are respectively connected to the movable blocks below the corresponding side slide grooves by threads. The driving source is connected to one of the bidirectional lead screws, and the two bidirectional lead screws are connected by a first chain transmission. The driving source drives the bidirectional lead screw to rotate through its output end, and drives the other bidirectional lead screw to rotate synchronously through the first chain, so that the left and right clamping parts move closer and further apart synchronously in the slide groove.

[0009] According to the above technical solution, the left and right alignment components are respectively disposed on the mounting plates of the left and right clamping components. The left and right alignment components include a push rod, an alignment plate and an abutment block. The push rod can movably pass through the mounting plate. The alignment plate is disposed at the inner end of the push rod and can rotate in a plane perpendicular to the push rod. The abutment block is fixed at the outer end of the push rod.

[0010] According to the above technical solution, an elastic element is provided between the mounting plate and the abutment block.

[0011] According to the above technical solution, the elastic element is a spring, and the spring is sleeved on the outside of the push rod.

[0012] According to the above technical solution, the actuator includes a cam, a mounting rod, and a second chain. The mounting rod is rotatably mounted on the mounting plate, the cam is fixed to the outer end of the mounting rod, and the second chain connects the mounting rod and the bidirectional lead screw.

[0013] According to the above technical solution, the outer side of the abutment block is provided with a chamfered structure. The drive source drives the mounting rod and cam to rotate through the second chain. The cam rotates until it contacts the outer inclined surface of the abutment block. The abutment block is forced to push the straightening plate inward through the push rod. The straightening plate extends beyond the left and right clamping parts to straighten the stairs. After the cam continues to rotate until it leaves the abutment block, the abutment block and the straightening plate are reset under the action of the elastic element.

[0014] This utility model has the following beneficial effects:

[0015] 1. In the hoisting of stairs, the drive mechanism first drives the left and right centering parts to move inward synchronously through the actuator to center the stairs and make them in a centered state. Then, the sliding mechanism drives the left and right clamping parts to clamp the stairs, restricting the displacement of the stairs and keeping the stairs in a stable centered clamping state, thereby improving installation accuracy and efficiency.

[0016] 2. This utility model first uses a straightening plate to straighten the tilted staircase, and then uses support rods to clamp the staircase. This avoids the support rods directly colliding with the staircase, thus protecting the support rods. Replacing the straightening plate is simpler and less costly than replacing the support rods.

[0017] 3. In this embodiment, the support rod can slide in the groove, and the centering plate can rotate in a plane perpendicular to the push rod, so that the lifting device can stably lift stairs of various sizes. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a hoisting tool for constructing prefabricated stairs in prefabricated buildings, provided for an embodiment of this utility model;

[0020] Figure 2 A bottom view of a hoisting tool for constructing prefabricated stairs in prefabricated buildings, provided as an embodiment of this utility model;

[0021] Figure 3 A cross-sectional structural schematic diagram of a hoisting tool for constructing prefabricated stairs in prefabricated buildings, provided for an embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the limiting device and the straightening device of a hoisting tool for the construction of prefabricated stairs in prefabricated buildings provided for an embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the clamping mechanism structure of a hoisting tool for constructing prefabricated stairs in prefabricated buildings, provided for an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the alignment device for a hoisting tool used in the construction of prefabricated stairs in prefabricated buildings, provided as an embodiment of the present utility model.

[0025] In the diagram: 1. Hanging plate; 11. Hanging ring; 12. Slide groove; 2. Sliding mechanism; 21. Movable plate; 22. Movable block; 3. Clamping mechanism; 31. Support rod; 32. Mounting plate; 33. Placement plate; 4. Drive mechanism; 41. Servo motor; 42. Bidirectional lead screw; 43. First chain; 5. Alignment mechanism; 51. Push rod; 52. Alignment plate; 53. Abutment block; 54. Spring; 6. Actuator; 61. Cam; 62. Mounting rod; 63. Second chain; 7. Staircase. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown, this embodiment provides a hoisting tool for the construction of prefabricated stairs in prefabricated buildings, including a hanging plate 1, a lifting ring 11 fixed to the upper part of the hanging plate 1, a limiting device, and a straightening device. The limiting device includes a sliding mechanism 2, a clamping mechanism 3, and a driving mechanism 4. The sliding mechanism 2 is located at the lower part of the hanging plate 1. The clamping mechanism 3 includes a left clamping member and a right clamping member. The left and right clamping members are respectively located on both sides of the lower part of the hanging plate 1 through the sliding mechanism 2. The driving mechanism 4 is connected to the sliding mechanism 2. The driving mechanism 4 drives the left and right clamping members to clamp and release the stairs 7 through the sliding mechanism 2. The straightening device includes a straightening mechanism 5 and an execution mechanism 6. The straightening mechanism 5 includes a left straightening member and a right straightening member. The left and right straightening members are respectively located on the outside of the left and right clamping members. The execution mechanism 6 connects the left and right straightening members and the driving mechanism 4. The driving mechanism 4 drives the left and right straightening members to move inward synchronously through the execution mechanism 6 to straighten and center the stairs 7. This lifting tool can adjust the position of the staircase 7 to keep it centered and clamped, ensuring the stability of the staircase 7 during hoisting and improving installation accuracy and efficiency.

[0029] In this embodiment, as Figure 3 As shown, the lifting ring 11 is fixed to the center of the upper surface of the hanging plate 1, and the lifting ring 11 has a hole for fixing the lifting rope. Two parallel sliding grooves 12 are provided on the hanging plate 1, located on both sides of the hanging plate 1. The sliding mechanism 2 includes movable plates 21 and movable blocks 22. Four movable plates 21 are provided, located at both ends of the two sliding grooves 12, and are slidably embedded in the sliding grooves 12. The upper end of the movable plate 21 is a plate-like structure, which is engaged with the sliding groove 12, and the lower end of the movable plate 21 extends through the sliding groove 12 into the lower part of the hanging plate 1. Four movable blocks 22 are also provided, respectively fixedly connected to the lower ends of the four movable plates 21, allowing the movable plates 21 and movable blocks 22 to slide together along the sliding grooves 12.

[0030] In this embodiment, as Figure 4 and Figure 5As shown, the left and right clamping members are respectively located on both sides of the lower part of the hanging plate 1 via the sliding mechanism 2. The left and right clamping members have the same structure, each including two support rods 31. The two support rods 31 are respectively located below the two sliding grooves 12 and are fixedly connected to the bottom of the corresponding movable block 22. An mounting plate 32 is fixed between the two support rods 31, and a placement plate 33 is fixed to the inner side of the bottom of the support rods 31. The driving mechanism 4 includes a driving source and two bidirectional lead screws 42. The two ends of the bidirectional lead screws 42 are provided with reverse threads. The two bidirectional lead screws 42 are respectively located below the two sliding grooves 12. The bidirectional lead screws 42 pass through the movable block 22 and are connected to the movable block 22 by threads, connecting the left and right clamping mechanisms 3 into one unit. The driving source is preferably a servo motor 41. The output end of the servo motor 41 is connected to one of the bidirectional lead screws 42, and the two bidirectional lead screws 42 are connected by a first chain 43.

[0031] In this embodiment, after the staircase 7 is placed on the placement plate 33, the servo motor 41 is started. The servo motor 41 drives the bidirectional lead screw 42 connected to it to rotate, and drives another bidirectional lead screw 42 to rotate synchronously through the first chain 43. The rotation of the two bidirectional lead screws 42 causes the movable blocks 22 on both sides to move closer together, driving the left and right clamping parts to stably clamp the staircase 7, ensuring the stability of the staircase 7 during subsequent installation. When the left and right clamping parts move, the installation plate 32 can synchronously support the displacement of the support rod 31 to prevent the support rod 31 from becoming misaligned. After the staircase 7 is hoisted, the servo motor 41 rotates in the opposite direction to control the left and right clamping parts to release the staircase 7.

[0032] Example 2

[0033] The principle and technical solution of Embodiment 2 are basically the same as those of Embodiment 1, except that a specific structural form of the alignment device is given.

[0034] In this embodiment, as Figure 6 As shown, the alignment device includes an alignment mechanism 5 and an execution mechanism 6. The alignment mechanism 5 includes a left alignment component and a right alignment component, which are respectively mounted on the mounting plates 32 of the left and right clamping components. The left and right alignment components have the same structure, each including a push rod 51, an alignment plate 52, and an abutment block 53. The push rod 51 can movably pass through the mounting plate 32. The alignment plate 52 is bolted to the inner end of the push rod 51 and is in a vertical position, perpendicular to the push rod 51. The direction of the alignment plate 52 can be adjusted by adjusting the bolt. The abutment block 53 is fixed to the outer end of the push rod 51, and the outer side of the abutment block 53 has a chamfered structure. An elastic element is provided between the mounting plate 32 and the abutment block 53. The elastic element is preferably a spring 54, which is sleeved on the outside of the push rod 51, with its two ends contacting the mounting plate 32 and the abutment block 53, respectively.

[0035] In this embodiment, the actuator 6 includes a cam 61, a mounting rod 62, and a second chain 63. The inner end of the mounting rod 62 is rotatably mounted on the mounting plate 32, and the cam 61 is fixed to the outer end of the mounting rod 62. The mounting position of the cam 61 corresponds to the abutment block 53. The mounting rod 62 and the bidirectional lead screw 42 are connected by the second chain 63.

[0036] In this embodiment, the drive source drives the bidirectional lead screw 42 to rotate. The bidirectional lead screw 42 drives the mounting rod 62 and cam 61 inside the left and right straightening members to rotate via the second chain 63. When the cam 61 rotates to contact the outer inclined surface of the abutment block 53, the abutment block 53 is forced to move inward. At the same time, the abutment block 53 compresses the spring 54 and drives the straightening plate 52 inward via the push rod 51. The straightening plate 52 extends beyond the support rod 31 of the left and right clamping members to straighten the staircase 7. After the cam 61 continues to rotate until it leaves the abutment block 53, the abutment block 53 and the straightening plate 52 are reset under the action of the elastic member.

[0037] In this embodiment, after the staircase 7 is placed on the placement plate 33, the servo motor 41 is started. On one hand, the bidirectional lead screw 42 and the first chain 43 drive the left and right clamping mechanisms 3 to move towards each other. On the other hand, the bidirectional lead screw 42 and the second chain 63 drive the cam 61 to rotate. When the cam 61 rotates, it pushes the straightening plate 52 inward through the abutment block 53. The straightening plate 52 extends beyond the inner side of the support rod 31 in the left and right clamping mechanisms 3, and contacts the staircase 7 first to straighten it. Then, the straightening plate 52 returns to its original position under the action of the spring 54. Then, the left and right clamping mechanisms 3 directly clamp the straightened staircase 7. This avoids the support rod 31 from directly colliding with the staircase 7, protects the support rod 31, and makes the replacement of the straightening plate 52 in the lifting device simpler and cheaper than that of the support rod 31.

[0038] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A hoisting tool for constructing prefabricated staircases in prefabricated buildings, characterized in that: Includes a hanging platform, a lifting ring fixed to the upper part of the hanging platform, a limiting device, and a straightening device; The limiting device includes a sliding mechanism, a clamping mechanism, and a driving mechanism. The sliding mechanism is located at the lower part of the suspended platform. The clamping mechanism includes a left clamping member and a right clamping member. The left and right clamping members are respectively located on both sides of the lower part of the suspended platform through the sliding mechanism. The driving mechanism is connected to the sliding mechanism. The driving mechanism drives the left and right clamping members to clamp and release the stairs through the sliding mechanism. The alignment device includes an alignment mechanism and an execution mechanism. The alignment mechanism includes a left alignment component and a right alignment component, which are respectively located on the outside of the left and right clamping components. The execution mechanism connects the left and right alignment components and the drive mechanism. The drive mechanism drives the left and right alignment components to move inward synchronously through the execution mechanism to align and center the staircase.

2. The hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 1, characterized in that: The sliding mechanism includes a movable plate and a movable block. The movable plate has two parallel grooves, and the movable plate is slidably embedded in the grooves. The movable block is fixed below the movable plate.

3. The hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 2, characterized in that: Both the left and right clamping components include two support rods fixed below the movable block, with a mounting plate fixed between the two support rods and a placement plate fixed to the inner side of the bottom of the support rods.

4. The hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 3, characterized in that: The driving mechanism includes a driving source and two bidirectional lead screws. The two bidirectional lead screws are respectively connected to the movable blocks below the corresponding side slide grooves by threads. The driving source is connected to one of the bidirectional lead screws, and the two bidirectional lead screws are connected by a first chain drive. The driving source drives the bidirectional lead screw to rotate through its output end, and drives the other bidirectional lead screw to rotate synchronously through the first chain, so that the left and right clamping parts move closer and further apart in the slide grooves at the same time.

5. A hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 4, characterized in that: The left and right alignment components are respectively mounted on the mounting plates of the left and right clamping components. The left and right alignment components include a push rod, an alignment plate, and an abutment block. The push rod can movably pass through the mounting plate. The alignment plate is located at the inner end of the push rod and can rotate in a plane perpendicular to the push rod. The abutment block is fixed to the outer end of the push rod.

6. A hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 5, characterized in that: An elastic element is provided between the mounting plate and the abutment block.

7. A hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 6, characterized in that: The elastic element is a spring, which is sleeved around the push rod.

8. A hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 6, characterized in that: The actuator includes a cam, a mounting rod, and a second chain. The mounting rod is rotatably mounted on the mounting plate, the cam is fixed to the outer end of the mounting rod, and the second chain connects the mounting rod and a bidirectional lead screw.

9. A hoisting tool for constructing prefabricated stairs in prefabricated buildings according to claim 8, characterized in that: The outer side of the abutment block is provided with a chamfered structure. The drive source drives the mounting rod and cam to rotate through the second chain. The cam rotates to contact the outer inclined surface of the abutment block. The abutment block is subjected to force and pushes the straightening plate inward through the push rod. The straightening plate extends beyond the left and right clamping parts to straighten the stairs. After the cam continues to rotate until it leaves the abutment block, the abutment block and the straightening plate are reset under the action of the elastic element.

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