Positioning tool for assembling stairs
By using positioning tools such as fixed rods, telescopic rods, and guide plates in prefabricated buildings, the problem of difficult docking during the installation of prefabricated stairs was solved, achieving precise positioning and efficient hoisting, thus improving the quality and efficiency of prefabricated stair installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-23
AI Technical Summary
In prefabricated buildings, the installation of prefabricated stairs is difficult due to the difficulty in connecting the embedded bolts and the limited hoisting space, which leads to the displacement and swaying of the prefabricated stairs and makes it difficult to achieve precise connection.
A positioning tool consisting of a fixed rod, a telescopic rod, a guide plate, and an adjustment unit is used. The positioning mechanism is fixed to the wall of the stairwell, and the guide plate and guide unit guide the movement and positioning of the prefabricated staircase. Combined with the adjustment of the telescopic rod, it is ensured that the staircase is aligned with the installation position during hoisting.
This method enables the prefabricated stairs to be hoisted into place in one go, avoiding positional deviations, improving installation efficiency and quality, simplifying the operation process, and reducing production costs.
Smart Images
Figure CN224396086U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated building construction, and in particular to a positioning tool for installing prefabricated stairs. Background Technology
[0002] With the popularization of prefabricated buildings, more and more high-rise buildings have adopted the construction method of partial prefabricated structure. When the main structure strength of this floor reaches the design requirements, the prefabricated stairs are assembled. However, the following problems will be encountered in the installation of prefabricated stairs: (1) The installation of prefabricated stairs requires the cooperation of tower cranes for hoisting. There are pre-embedded bolts in the installation position of the prefabricated stairs. During the hoisting of the tower crane, it is difficult to connect the bolt through holes on the prefabricated stairs with the pre-embedded bolts. The pre-embedded bolts are often deviated, and the tower crane needs to repeatedly adjust the position of the prefabricated stairs. (2) When the main construction progress of this floor can meet the installation of prefabricated stairs, the installation process of the wall, column and beam formwork of this floor has been basically completed to more than 90%, and many support frames have been erected. The usable space for hoisting the prefabricated stairs is limited and compressed. In the limited hoisting space, how to overcome the swaying of the prefabricated stairs suspended in the air and avoid collision with the existing facilities has become a problem that needs to be solved on site. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a positioning tool for installing prefabricated stairs.
[0004] The technical solution includes a positioning mechanism fixed to the wall of the stairwell. There are two positioning mechanisms, which are respectively fixed to the walls on both sides of the lower stairwell interface and the upper stairwell interface.
[0005] The positioning mechanism includes a fixed rod and a telescopic rod slidably disposed at one end of the fixed rod. A stop plate is fixedly disposed at each of the two opposite ends of the fixed rod and the telescopic rod. An adjustment unit is disposed at the end of the fixed rod near the telescopic rod.
[0006] A movable sleeve is slidably mounted on the fixed rod, and an "L"-shaped stair guide plate is fixedly mounted on the movable sleeve. A set of guide units is respectively set in the middle of the upper end of the two side walls of the stair guide plate.
[0007] Preferably, the guide unit includes a mounting base fixedly mounted on the stair guide plate, a guide rod rotatably mounted on the mounting base, and a connecting rod rotatably mounted on the mounting base. One end of the connecting rod is rotatably connected to the mounting base, and the other end is rotatably mounted with a handle. The middle part of the handle is rotatably connected to the connecting rod, and one end of the handle is rotatably connected to the guide rod.
[0008] Preferably, the adjusting unit includes a fixed base fixedly disposed at one end of the fixed rod, a handle rotatably disposed on the fixed base, a connecting rod rotatably disposed on the handle, an adjusting sleeve rotatably disposed at the movable end of the connecting rod, and the adjusting sleeve sliding on the telescopic rod;
[0009] A bracket is fixedly installed on one side of the fixed base and the adjusting sleeve, and a pin is slidably installed on the bracket. Several insertion holes are opened on the body of the telescopic rod, and the pin is inserted into the insertion holes.
[0010] Preferably, a spring is sleeved on the outside of the pin, one end of the spring is fixedly connected to the middle of the pin, and the other end abuts against the bracket;
[0011] Each of the aforementioned pins is fixedly equipped with a pull rope.
[0012] Preferably, the fixed rod has several positioning holes, and a mounting hole is provided at each of the two ends of the movable sleeve. The movable sleeve is fixedly connected by positioning pins that pass through the mounting holes and positioning holes.
[0013] The beneficial effects of the technical solution provided by this utility model embodiment are: overcoming the defect of difficult positioning during the installation of prefabricated stairs, effectively preventing docking deviation caused by stairs shaking, and realizing the one-time hoisting and installation of prefabricated stairs; the overall structural design is simple, the adjustment and disassembly of each component is convenient, the manufacturing cost is low, and the installation efficiency and quality can be significantly improved. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.
[0015] Figure 2 This is a schematic diagram of the guide unit in an embodiment of the present utility model.
[0016] Figure 3 This is a schematic diagram of the adjustment unit and telescopic rod in an embodiment of the present invention.
[0017] Figure 4 This is a schematic diagram of the adjusting sleeve and the latch in an embodiment of the present utility model.
[0018] Figure 5 This is a schematic diagram illustrating the usage state of an embodiment of the present utility model.
[0019] The attached figures are labeled as follows: 1. Positioning mechanism; 2. Fixed rod; 3. Telescopic rod; 4. Support plate; 5. Adjustment unit; 6. Moving sleeve; 7. Stair guide plate; 8. Guide unit; 9. Mounting seat; 10. Guide rod; 11. Connecting rod; 12. Handle; 13. Fixed seat; 14. Handle; 15. Linkage rod; 16. Adjustment sleeve; 17. Bracket; 18. Pin; 19. Insertion hole; 20. Spring; 21. Positioning hole; 22. Mounting hole; 23. Precast staircase. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.
[0021] It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] Example 1
[0025] See Figures 1 to 5This utility model provides a positioning tool for installing prefabricated stairs, including a positioning mechanism 1 fixed on the wall of the stairwell. There are two positioning mechanisms 1, which are respectively fixed on the walls on both sides of the lower stairwell interface and the upper stairwell interface.
[0026] Positioning mechanism 1 includes a fixed rod 2 and a telescopic rod 3 that is slidably disposed at one end of the fixed rod 2. A stop plate 4 is fixedly disposed at each of the two opposite ends of the fixed rod 2 and the telescopic rod 3. A rubber pad is disposed on the opposite side of the two stop plates 4. An adjustment unit 5 is disposed at the end of the fixed rod 2 near the telescopic rod 3.
[0027] A movable sleeve 6 is slidably installed on the fixed rod 2, and an "L"-shaped stair guide plate 7 is fixedly installed on the movable sleeve 6. A set of guide units 8 are respectively installed in the middle of the upper end of the two side walls of the stair guide plate 7.
[0028] The two stair guide plates 7 are set diagonally on the horizontal plane to further constrain the horizontal displacement of the staircase and ensure that the staircase is always aligned with the upper and lower floor interfaces during the descent, and finally falls precisely into the installation position.
[0029] First, install the two positioning mechanisms 1 on the walls on both sides of the lower staircase interface and the upper staircase interface respectively. During installation, adjust the extension length of the telescopic rod 3 through the adjustment unit 5 so that the abutment plates 4 at both ends of the fixed rod 2 and the telescopic rod 3 are tightly pressed against the wall. The rubber pad can enhance the friction and avoid damage to the wall.
[0030] Next, according to the installation position of the stairs, the movable sleeve 6 on the sliding fixed rod 2 is used to adjust the position of the "L"-shaped stair guide plate 7. After adjustment, the movable sleeve 6 is fixed. Then, the prefabricated stairs are lifted up and finally moved and positioned by the guide unit 8 at the upper end of both sides of the stair guide plate 7 to complete the positioning of the stairs. The prefabricated stairs 23 are then lowered and positioned on the upper and lower steps of the stairs by a tower crane.
[0031] The guide unit 8 includes a mounting base 9 fixedly mounted on the stair guide plate 7, a guide rod 10 rotatably mounted on the mounting base 9, and a connecting rod 11 rotatably mounted on the mounting base 9. One end of the connecting rod 11 is rotatably connected to the mounting base 9, and the other end is rotatably connected to a handle 12. The middle part of the handle 12 is rotatably connected to the connecting rod 11, and one end of the handle 12 is rotatably connected to the guide rod 10.
[0032] When the prefabricated staircase 23 is lifted and approaches the stair guide plate 7, there is an angular deviation between the prefabricated staircase 23 and the stair guide plate 7. The handles 12 of the two guide units 8 can be operated respectively. When operating, the handle 12 is rotated. Since the middle part of the handle 12 is rotatably connected to the connecting rod 11 and one end is rotatably connected to the guide rod 10, and the other end of the connecting rod 11 is rotatably connected to the mounting base 9, the rotation of the handle 12 will drive the guide rod 10 to rotate around the mounting base 9, thereby adjusting the tilt angle of the guide rod 10.
[0033] By adjusting the angle of the guide rods 10 of the guide units 8 on both sides, the guide rods 10 push the prefabricated staircase 23 to move, so that the side of the prefabricated staircase 23 matches the staircase guide plate 7, guiding the staircase to gradually correct the angle deviation until the staircase and the staircase guide plate 7 correspond in position, completing the precise docking.
[0034] The adjustment unit 5 includes a fixed base 13 fixedly mounted at one end of the fixed rod 2, a handle 14 rotatably mounted on the fixed base 13, a connecting rod 15 rotatably mounted on the handle 14, an adjustment sleeve 16 rotatably mounted on the movable end of the connecting rod 15, and the adjustment sleeve 16 sliding on the telescopic rod 3.
[0035] A bracket 17 is fixedly installed on one side of the fixed base 13 and the adjusting sleeve 16 respectively. A pin 18 is slidably installed on the bracket 17. Several holes 19 are opened on the body of the telescopic rod 3, and the pin 18 is inserted into the holes 19.
[0036] When it is necessary to adjust the extension length of the telescopic rod 3, the handle 14 is turned back and forth. The handle 14, under the action of the linkage 15, drives the adjusting sleeve 16 to move. When the adjusting sleeve 16 moves, the pin 18 inside the adjusting sleeve 16 is inserted into the socket 19, causing the telescopic rod 3 to extend outward. When the adjusting sleeve 16 moves in the opposite direction, the pin 18 on the fixed seat 13 is inserted into the socket 19, limiting the position of the telescopic rod 3. This process is repeated to extend the length of the telescopic rod 3, so that the abutment 4 is firmly pressed against the walls on both sides of the stairwell.
[0037] The end of the pin 18 near the socket 19 is provided with an angle, which faces the fixed base 13. When the telescopic rod 3 extends outward, its rod body presses the angle at the end of the pin 18. The angle is subjected to force, causing the pin 18 to slide along the bracket 17 and compress the spring 20. The pin 18 automatically disengages from the current socket 19. As the telescopic rod 3 continues to move, when the new socket 19 is aligned with the pin 18, the spring 20 resets and pushes the pin 18 into the socket 19, thus achieving temporary positioning of the telescopic rod 3.
[0038] A spring 20 is fitted on the outside of the pin 18. One end of the spring 20 is fixedly connected to the middle of the pin 18, and the other end abuts against the bracket 17.
[0039] Each pin 18 is fixedly equipped with a pull rope.
[0040] When adjusting the telescopic rod 3, if it is necessary to shorten its length, pull the rope to drive the pin 18 to overcome the elastic force of the spring 20, so that the pin 18 disengages from the socket 19; at this time, the user moves the telescopic rod 3 to retract inward.
[0041] The fixed rod 2 has several positioning holes 21 on its body, and a mounting hole 22 is opened at each of the two ends of the movable sleeve 6. The movable sleeve 6 is fixedly connected by positioning pins that pass through the mounting hole 22 and the positioning hole 21.
[0042] The positioning hole 21 and the positioning pin can quickly fix and unlock the movable sleeve 6. The operation is simple and convenient, and it is easy to flexibly adjust the position of the stair guide plate 7 according to the stair installation requirements, thus improving the flexibility of tool use.
[0043] The positioning holes 21 provide multiple fixed positions for the movable sleeve 6, which can precisely adjust the position of the stair guide plate 7 to meet the installation and positioning requirements of prefabricated stairs of different sizes and expand the applicability of the tool.
[0044] When this utility model is used, the projections of the two stair guide plates 7 on the horizontal plane are set diagonally, which further constrains the horizontal displacement of the staircase and ensures that the staircase is always aligned with the upper and lower floor interfaces during the descent process, and finally falls accurately into the installation position.
[0045] First, install the two positioning mechanisms 1 on the walls on both sides of the lower staircase interface and the upper staircase interface respectively. During installation, adjust the extension length of the telescopic rod 3 through the adjustment unit 5 so that the abutment plates 4 at both ends of the fixed rod 2 and the telescopic rod 3 are tightly pressed against the wall. The rubber pad can enhance the friction and avoid damage to the wall.
[0046] Next, according to the installation position of the stairs, the movable sleeve 6 on the sliding fixed rod 2 is used to adjust the position of the "L"-shaped stair guide plate 7. After adjustment, the movable sleeve 6 is fixed. Then, the prefabricated stairs are lifted up and finally moved and positioned by the guide unit 8 at the upper end of both sides of the stair guide plate 7 to complete the positioning of the stairs. The prefabricated stairs 23 are then lowered and positioned on the upper and lower steps of the stairs by a tower crane.
[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A positioning tool for assembling a prefabricated stair installation, characterized in that It includes a positioning mechanism (1) fixed on the wall of the stairwell. There are two positioning mechanisms (1), which are fixed on the walls on both sides of the lower stairwell interface and the upper stairwell interface, respectively. The positioning mechanism (1) includes a fixed rod (2) and a telescopic rod (3) slidably disposed at one end of the fixed rod (2). A stop plate (4) is fixedly disposed at each of the two opposite ends of the fixed rod (2) and the telescopic rod (3). An adjustment unit (5) is disposed at the end of the fixed rod (2) near the telescopic rod (3). The fixed rod (2) is slidably provided with a movable sleeve (6), and an "L"-shaped stair guide plate (7) is fixedly provided on the movable sleeve (6). A set of guide units (8) are respectively provided in the middle of the upper end of the two side walls of the stair guide plate (7).
2. The positioning tool for fabricated stair installation according to claim 1, wherein The guide unit (8) includes a mounting base (9) fixedly mounted on the stair guide plate (7), a guide rod (10) rotatably mounted on the mounting base (9), and a connecting rod (11) rotatably mounted on the mounting base (9). One end of the connecting rod (11) is rotatably connected to the mounting base (9), and the other end is rotatably connected to a handle (12). The middle part of the handle (12) is rotatably connected to the connecting rod (11), and one end of the handle (12) is rotatably connected to the guide rod (10).
3. The positioning tool for fabricated stair installation according to claim 1, wherein The adjustment unit (5) includes a fixed seat (13) fixedly disposed at one end of the fixed rod (2), a handle (14) rotatably disposed on the fixed seat (13), a connecting rod (15) rotatably disposed on the handle (14), an adjustment sleeve (16) rotatably disposed at the movable end of the connecting rod (15), and the adjustment sleeve (16) slides on the telescopic rod (3). A bracket (17) is fixedly installed on one side of the fixed base (13) and the adjusting sleeve (16), and a pin (18) is slidably installed on the bracket (17). Several insertion holes (19) are opened on the body of the telescopic rod (3), and the pin (18) is inserted into the insertion hole (19).
4. The positioning tool for assembled stair installation according to claim 3, wherein A spring (20) is sleeved on the outside of the pin (18). One end of the spring (20) is fixedly connected to the middle of the pin (18), and the other end abuts against the bracket (17). A pull rope is fixedly installed on each of the aforementioned pins (18).
5. The positioning tool for fabricated stair installation according to claim 1, wherein The fixed rod (2) has several positioning holes (21) on its body, and an installation hole (22) is opened at each of the two ends of the movable sleeve (6). The movable sleeve (6) is fixedly connected by a positioning pin that passes through the installation hole (22) and the positioning hole (21).