Temporary support device for steel revolving stair assembly

Abstract

The application discloses a temporary supporting device for steel rotary stair assembly, which comprises a bottom support, a stand, a top adjusting seat and a supporting plate. The stand is connected to the bottom support. The top adjusting seat is provided with a seat body, a lifting assembly and a swinging assembly. The seat body is connected to the stand. The lifting assembly is slidably connected to the seat body. The lifting assembly can move up and down along the seat body and is fixed. The swinging assembly is connected to the lifting assembly. The swinging assembly is swingably connected to the lifting assembly. The swinging assembly can be fixed to the lifting assembly. The supporting plate is connected to the swinging assembly. The swinging of the swinging assembly can adjust the angle of the supporting plate. The temporary supporting device for steel rotary stair assembly provided by the application can adjust the supporting height and the supporting angle. The overall height is adjusted by the lifting assembly moving up and down along the seat body. The supporting angle is adjusted by the swinging assembly swinging relative to the lifting assembly. The device can temporarily support steel rotary stairs with different heights and angles, and the assembly of the steel rotary stairs is more convenient.

Description

Technical Field

[0001] This invention relates to the field of steel spiral staircase support technology, and more specifically to a temporary support device for assembling a steel spiral staircase. Background Technology

[0002] The on-site hoisting of the rotating arc components of the spiral staircase is complicated and requires high precision in component processing. The processing plant pre-assembles the steel components of the spiral staircase layer by layer to ensure the processing accuracy of the components. During the pre-assembly at the processing plant, relevant measurement data and measurement control points should be sent to the site in a timely manner to guide the on-site installation work. The staircase is installed on-site using the in-situ support assembly method. During the support process, temporary support devices for steel spiral staircase assembly are required.

[0003] The current installation sequence for each spiral staircase is as follows: temporary support installation → installation of the first section of the spiral staircase → welding of the butt joints of the components → continued installation of temporary supports in the same manner → continued installation of each section of the spiral staircase in the same manner → until the spiral staircase is connected to the top steel platform → unloading of temporary supports (from top to bottom) → anti-corrosion coating of joints → installation of patterned steel plates at joints → pouring of concrete for the steps → spraying of fire-retardant coating. During the assembly of the steel spiral staircase, temporary support devices are required. These temporary supports are divided into ground-contact supports and inter-staircase supports. However, when the existing support devices are used to support two spiral staircases, the inclined design of the steel spiral staircase, and the fact that the inclination angle is not exactly the same at every point, means that workers basically need to cut each support into support pieces of the appropriate length and inclination angle to stably support it. This makes the inclined support of the steel spiral staircase quite troublesome for workers and, to some extent, prolongs the installation time of the support structure and increases the labor intensity of the workers.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] To solve one of the above-mentioned technical problems, the present invention provides a temporary support device for assembling a steel spiral staircase.

[0006] This application provides the following technical solution:

[0007] A temporary support device for assembling a steel spiral staircase includes:

[0008] Bottom support;

[0009] A column, which is connected to the bottom support;

[0010] The top adjustment seat has a seat body, a lifting assembly, and a swing assembly. The seat body is connected to the column. The lifting assembly is slidably connected to the seat body and can move up and down along the seat body and be fixed. The swing assembly is connected to the lifting assembly and can swing oscillatingly connected to the lifting assembly and can be fixed to the lifting assembly.

[0011] A support plate is connected to the swing assembly, and the swing assembly can adjust the angle of the support plate by swinging.

[0012] Optionally, the seat body includes a base plate and a guide frame;

[0013] The base plate is vertically connected to the column;

[0014] The guide frame is vertically connected to the base plate, and the guide frame is provided with multiple positioning holes, which are arranged at intervals along the height direction of the column.

[0015] The lifting assembly is slidably connected to the guide frame, and a fastener can pass through the lifting assembly at one end and connect to the corresponding positioning hole to fix the height of the lifting assembly.

[0016] Optionally, the guide frame includes two side guide plates and a middle plate;

[0017] The two side guide plates are parallel;

[0018] The intermediate plate is located between the two side guide plates and is connected to the two side guide plates respectively;

[0019] Two sliding grooves are provided on the side guide plate, and the two sliding grooves are located on both sides of the middle plate along the thickness direction. A plurality of positioning holes are provided on the side guide plate between the two sliding grooves, and each positioning hole is arranged at intervals along the movement direction of the lifting assembly.

[0020] The lifting assembly is arranged through the two slides, and the fastener can pass through the lifting assembly at one end and be connected to the corresponding positioning hole.

[0021] Optionally, the lifting assembly includes two inner side plates and two outer side fixing frames;

[0022] The two inner side plates are located between the two side guide plates and are respectively disposed on both sides of the middle plate along the thickness direction;

[0023] The outer fixing frame includes an outer end plate and two sliding plates vertically connected to the outer end plate. The outer end plate is located outside the side guide plate. The two sliding plates pass through two grooves on the corresponding side guide plates and are respectively connected to the corresponding inner side plates.

[0024] The fastener can pass through the outer end plate and connect to the corresponding positioning hole at one end.

[0025] Optionally, trapezoidal positioning grooves are provided on both end faces of the inner side plate;

[0026] A trapezoidal slider is provided on the side of the skateboard away from the outer end plate;

[0027] The trapezoidal slider is inserted into the trapezoidal positioning groove;

[0028] The positioning element is inserted through the inner side plate and the trapezoidal slider along the thickness direction of the inner side plate to fix the inner side plate and the trapezoidal slider.

[0029] Optionally, the swing assembly is hinged to the inner side plate;

[0030] Multiple prepositioning slots are provided on the inner side plate, and each prepositioning slot is arranged sequentially along the circumferential direction of the swing axis of the swing assembly.

[0031] The swing component is provided with positioning protrusions, and during the swinging process of the swing component, the positioning protrusions are sequentially engaged into each of the prepositioning slots;

[0032] In this process, after the positioning protrusion is engaged in the prepositioning groove, the swing assembly is also welded to the inner side plate.

[0033] Optionally, the swing assembly is hinged to the inner side plate;

[0034] Multiple fixing holes are provided on the inner side plate, and each fixing hole is arranged sequentially along the circumference of the swing axis of the swing assembly;

[0035] The swing assembly is provided with positioning and mating holes, and during the swinging process of the swing assembly, the positioning and mating holes are connected to each of the fixing holes in sequence;

[0036] The positioning element can be inserted into the positioning mating hole and the corresponding fixing hole to fix the angle of the swing assembly.

[0037] Optionally, the support plate includes a central support plate and two side support plates, with the two side support plates respectively hinged to both sides of the central support plate;

[0038] The central support plate is connected to the swing assembly;

[0039] The support plate has a folded state and an unfolded state. In the folded state, both side support plates are attached to the outer wall surface of the middle support plate in the vertical thickness direction. In the unfolded state, both side support plates are unfolded to the plane where the middle support plate is located.

[0040] Optionally, the bottom support includes a flat base and an inclined base. The flat base is fixedly connected to the column, and the inclined base is detachably connected to the flat base. The inclined base has an inclined support surface, and the inclined support surface and the flat base have an included angle.

[0041] Optionally, the inclined base is thick at one end and thin at the other end, and a positioning pin is provided on the thick end of the inclined base.

[0042] By adopting the above technical solution, this application has the following beneficial effects:

[0043] The temporary support device for assembling a steel spiral staircase provided in this application has a support plate at the top that provides support and is mounted on a top adjustable seat that can swing and be adjusted along the length of the column. This allows for adjustments to both the support height and the support angle of the temporary support device. The overall height is adjusted by raising and lowering the lifting assembly along the seat, and the support angle is adjusted by swinging the swing assembly relative to the lifting assembly. This allows the device to provide temporary support for steel spiral staircases of different heights and angles, making the assembly of the steel spiral staircase more convenient. Attached Figure Description

[0044] The accompanying drawings, which form part of this application, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0045] Figure 1 This is a three-dimensional structural schematic diagram of a temporary support device for assembling a steel spiral staircase provided in an embodiment of the present invention;

[0046] Figure 2 This diagram shows a partial structural diagram of the flat base and the inclined base of the temporary support device for assembling a steel spiral staircase provided in an embodiment of the present invention.

[0047] Figure 3 This diagram shows the structure of the top adjustment seat of the temporary support device for assembling a steel spiral staircase provided in an embodiment of the present invention;

[0048] Figure 4 This diagram shows a structural schematic of the base of a temporary support device for assembling a steel spiral staircase provided in an embodiment of the present invention.

[0049] Figure 5 This diagram illustrates the structure of the temporary support device for assembling a steel spiral staircase, including the support plate, lifting assembly, and swing assembly, according to an embodiment of the present invention.

[0050] Figure 6 This diagram shows a cross-sectional view of the cooperation between the central support plate and the swing assembly of the temporary support device for assembling a steel spiral staircase according to an embodiment of the present invention.

[0051] Figure 7 This is a schematic diagram showing the case where the positioning pin in the bottom support of the temporary support device for assembling a steel spiral staircase provided in an embodiment of the present invention is a bolt;

[0052] Figure 8 This is a schematic diagram showing the configuration of a temporary support device for assembling a steel spiral staircase provided in an embodiment of the present invention, in which the positioning pin is a sliding sleeve and a latch.

[0053] In the diagram: Bottom support 1, flat base 11, trapezoidal groove 111, through hole 112, inclined base 12, inclined support surface 121, mating surface 122, mating slider 123, recess 124, threaded through groove 126, positioning pin 13, sliding sleeve 1351, pin 1352, column 2, top adjusting seat 3, seat body 31, base plate 311, guide frame 312, side guide plate 3121, slide groove 31 211, Positioning hole 31212, Intermediate plate 3122, Lifting assembly 32, Inner side plate 321, Trapezoidal positioning groove 3211, Pre-positioning groove 3212, Outer fixing frame 322, Outer end plate 3221, Slide plate 3222, Trapezoidal slider 3223, Swing assembly 33, Positioning protrusion 331, Spring 332, Fastener 34, Support plate 4, Middle support plate 41, Side support plate 42, Limiting plate 43. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0055] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] like Figures 1 to 8 As shown in the illustration, this application provides a temporary support device for assembling a steel spiral staircase, including a bottom support 1, a column 2, a top adjusting seat 3, and a support plate 4. The column 2 is connected to the bottom support 1. The top adjusting seat 3 has a seat body 31, a lifting assembly 32, and a swing assembly 33. The seat body 31 is connected to the column 2. The lifting assembly 32 is slidably connected to the seat body 31 and can move up and down along the seat body 31 and be fixed. The swing assembly 33 is connected to the lifting assembly 32 and is swingably connected to the lifting assembly 32. The swing assembly 33 can be fixed to the lifting assembly 32. The support plate 4 is connected to the swing assembly 33, and the swinging of the swing assembly 33 can adjust the angle of the support plate 4.

[0058] The temporary support device for assembling a steel spiral staircase provided in this application has a support plate 4 at the top that provides support and is mounted on a top adjustable seat 3 that can swing and be adjusted in position along the length of the column 2. This allows for adjustments to both the support height and the support angle of the temporary support device. The overall height is adjusted by raising and lowering the lifting assembly 32 along the seat 31, and the support angle is adjusted by swinging the swing assembly 33 relative to the lifting assembly 32. This allows the device to provide temporary support for steel spiral staircases of different heights and angles, making the assembly of the steel spiral staircase more convenient.

[0059] In some possible implementations, the base 31 includes a base plate 311 and a guide frame 312, with the base plate 311 vertically connected to the column 2. The guide frame 312 is vertically connected to the base plate 311, and the guide frame 312 has multiple positioning holes 31212, which are spaced apart sequentially along the height direction of the column 2. The lifting assembly 32 is slidably connected to the guide frame 312, and a fastener 34 can pass through the lifting assembly 32 at one end and connect to a corresponding positioning hole 31212 to fix the height of the lifting assembly 32. The overall height of the support device can be adjusted by changing the engagement of the lifting assembly 32 and the fastener 34 with different positioning holes 31212, and the engagement of the fastener 34 with the positioning hole 31212 ensures that the adjusted height is stable, thereby ensuring the stability of the support.

[0060] In some possible implementations, the guide frame 312 includes two side guide plates 3121 and a middle plate 3122. The two side guide plates 3121 are parallel, and the middle plate 3122 is located between the two side guide plates 3121 and connects to both side guide plates 3121. Two sliding grooves 31211 are provided on each side of the middle plate 3122 along its thickness direction. A plurality of positioning holes 31212 are provided on each side guide plate 3121 between the two sliding grooves 31211, and these positioning holes are spaced apart sequentially along the movement direction of the lifting assembly 32. The lifting assembly 32 passes through the two sliding grooves 31211, and a fastener 34 can pass through the lifting assembly 32 at one end and connect to a corresponding positioning hole 31212. The slide groove 31211 limits the sliding trajectory of the lifting assembly 32. Guide plates are provided on both sides, and each guide plate has two slide grooves 31211, which fully ensures the guiding effect of the lifting assembly 32 and ensures that the lifting assembly 32 is balanced on both sides during the lifting process, preventing tilting. The positioning hole 31212 is set between the two slide grooves 31211, which makes it more stable after fixing. Under the limit of the slide groove 31211, the lifting assembly 32 will not tilt in the other direction.

[0061] In some possible implementations, the lifting assembly 32 includes two inner side plates 321 and two outer fixing brackets 322. The two inner side plates 321 are located between the two side guide plates 3121 and are respectively disposed on both sides of the intermediate plate 3122 along the thickness direction. The outer fixing brackets 322 include outer end plates 3221 and two sliding plates 3222 perpendicularly connected to the outer end plates 3221. The outer end plates 3221 are located outside the side guide plates 3121. The two sliding plates 3222 respectively pass through two sliding grooves 31211 on the corresponding side guide plates 3121 and are respectively connected to the corresponding inner side plates 321. Fasteners 34 can pass through the outer end plates 3221 at one end and connect to the corresponding positioning holes 31212. The lifting assembly 32 is divided into inner side plates 321 and outer fixing brackets 322, and is set separately, which facilitates installation. The electroplated plate 3222 that runs through the slide groove 31211 prevents the connection point from being located inside the slide groove 31211, thus ensuring smooth sliding.

[0062] In some possible implementations, trapezoidal positioning grooves 3211 are formed on both end faces of the inner side plate 321, and a trapezoidal slider 3223 is provided on the side of the slide plate 3222 opposite to the outer end plate 3221. The trapezoidal slider 3223 is inserted into the trapezoidal positioning groove 3211. The positioning element passes through the inner side plate 321 and the trapezoidal slider 3223 along the thickness direction of the inner side plate 321 to fix the inner side plate 321 and the trapezoidal slider 3223. The trapezoidal slider is connected to the trapezoidal groove 31211, which can realize the lateral limit after connection. In addition, the positioning element ensures that the inner side plate 321 and the outer fixing frame 322 are firmly connected and will not have relative displacement.

[0063] In some possible implementations, the swing assembly 33 can be connected to the inner side plate 321 in various ways after adjusting its position. This application specifically discloses the following two methods, but is not limited to these two.

[0064] A first connection method between the swing assembly 33 and the inner side plate 321: The swing assembly 33 is hinged to the inner side plate 321. The inner side plate 321 has multiple pre-positioning slots 3212, which are sequentially arranged circumferentially along the swing axis of the swing assembly 33. The swing assembly 33 has positioning protrusions 331, which sequentially engage with each of the pre-positioning slots 3212 during the swinging process. After the positioning protrusions 331 engage with the pre-positioning slots 3212, the swing assembly 33 is also welded to the inner side plate 321.

[0065] This connection method swings the swing assembly 33 to a suitable position, and the positioning protrusion 331 is inserted into the pre-positioning groove 3212 at the corresponding position, maintaining the initial stability of the swing assembly 33 and facilitating the welding of the swing assembly 33 to the inner side plate 321 without wobbling. This setting not only makes the final welding and positioning process of the swing assembly 33 more convenient, but also ensures accurate welding position and accurate support angle.

[0066] Furthermore, in some possible implementations, such as Figure 6 As shown, the swing component has a positioning groove, and the positioning protrusion 331 is slidably inserted into the positioning groove. A spring 332 is provided between the positioning protrusion 331 and the bottom of the positioning groove, and the end of the spring 332 away from the positioning protrusion 331 is fixedly connected to the inner wall of the positioning groove. The positioning protrusion 331 can be completely embedded in the positioning groove. In this way, only a relatively strong push is needed to switch the positioning groove that the positioning protrusion 331 is engaged with. After the push is removed, under the push of the spring 332, the positioning post can maintain a certain degree of stability when inserted into the positioning groove, which facilitates subsequent welding.

[0067] A second connection method between the swing assembly 33 and the inner side plate 321: The swing assembly 33 is hinged to the inner side plate 321, and the inner side plate 321 is provided with multiple fixing holes, which are arranged sequentially along the circumference of the swing axis of the swing assembly 33. The swing assembly 33 is provided with positioning and fitting holes, which connect sequentially to the fixing holes during the swinging process of the swing assembly 33. Positioning elements can pass through the positioning and fitting holes and the corresponding fixing holes to fix the angle of the swing assembly 33. The angle of the swing assembly is positioned by adjusting the engagement of different positioning holes 31212 and fixing blocks.

[0068] The second connection method is more convenient than the first, but its connection stability is relatively poor, making it suitable for applications with lower weight. The first connection method is relatively complex to operate, but its positioning is very secure, making it suitable for bridges requiring greater support force, longer support time, and high precision.

[0069] In some possible implementations, the support plate 4 includes a central support plate 41 and two side support plates 42, with the two side support plates 42 respectively hinged to both sides of the central support plate 41. The central support plate 41 is connected to the swing assembly 33. The support plate 4 has a folded state and an unfolded state. In the folded state, both side support plates 42 are attached to the outer wall surface of the central support plate 41 in the vertical thickness direction. In the unfolded state, both side support plates 42 are unfolded to the plane where the central support plate 41 is located. The support plate 4 is configured as a foldable plate. When in use, the support plate 4 is unfolded to increase the support area and improve support stability. When not in use, it can be folded up for easy transportation and storage. Furthermore, the installation of large-area panels is often inconvenient; the support plate 4 can be folded up for installation and adjustment, making installation and adjustment more convenient.

[0070] In some possible implementations, the central support plate 41 is hinged to the two sides of the swing direction with side support plates 42. The central support plate 41 is provided with two corresponding side support plates 42 on the side near the top adjustment seat 3, and limit plates 43 are respectively provided on the side support plates 42. When the two side support plates 42 are in the unfolded state, the bottom support 1 of the two side support plates 42 rests on the limit plates 43.

[0071] In some possible implementations, the bottom support 1 includes a flat base 11 and an inclined base 12. The flat base 11 is fixedly connected to the column 2, and the inclined base 12 is detachably connected to the flat base 11. The inclined base 12 has an inclined support surface 121, and the inclined support surface 121 and the flat base 11 form an angle. The lower part of the bottom support device of the spiral staircase is supported on the ground and requires a base with a support surface that forms a 90-degree angle with the column 2. The bottoms of the upper support devices, except for the bottom one, are supported at the adjacent staircase connections below. The adjacent staircase connections have a wider support surface, providing more stable support. However, since the adjacent staircase connections are inclined surfaces, the support devices need bases with support surfaces that do not form a 90-degree angle with the column 2. The support column 2 is connected to a straight base 11 at a 90-degree angle. A detachable inclined base 12 with a non-90-degree angle to the support column 2 is provided, allowing the base to adapt to various usage environments. Only the inclined base 12 needs to be disassembled and assembled. If a support with a different inclination is needed, only the inclined base 12 with the different inclination can be replaced.

[0072] Furthermore, the flat base 11 has a trapezoidal groove 111 with a trapezoidal cross-section on the side facing away from the column 2. The width of the groove 111 on the side closer to the column 2 is greater than the width of the groove on the side facing away from the column 2. The inclined base 12 has a mating surface 122 parallel to the flat base 11 on the side facing away from the inclined support surface 121. The mating surface 122 has a matching slider 123 with a trapezoidal cross-section that is adapted to the trapezoidal groove 111. The trapezoidal sliding connection groove ensures that the inclined base 12 will not fall off along the direction of the column 2 after insertion. Preliminary positioning has been performed to facilitate subsequent installation.

[0073] Furthermore, the flat base 11 has multiple through holes 112 on its outer periphery. The extending direction of the through holes 112 is the same as the extending direction of the column 2. One end of the fixing member passes through the through hole 112 and is fixedly connected to the inclined base 12. The other end of the fixing member is on the side of the flat base 11 opposite to the inclined base 12. In this way, the inclined base 12 can be stably fixed on the flat base 11 without misalignment or shaking.

[0074] In some possible implementations, the inclined base 12 is thicker at one end and thinner at the other, with a positioning pin 13 provided on the thicker end. The positioning pin 13 can be inserted into a groove in the spiral staircase support. Because the support device is supported on an inclined surface when using the inclined base 12, the positioning pin 13 engaging with the groove can position the support device and prevent the bottom of the support device from sliding. Since the thicker end of the inclined base 12 is located on the lower side, the positioning pin 13 is positioned closer to the thicker side of the inclined base 12.

[0075] Furthermore, this application discloses the following two methods for setting the positioning pin 13, but the methods for setting the positioning pin 13 are not limited to these two.

[0076] The first method of setting the locating pin 13, such as Figure 8 As shown, the positioning pin 13 includes a sliding sleeve 1351 connected to the inclined base 12 and a pin 1352 that can slide along the sliding sleeve 1351. Lifting the pin 1352 can unlock the limit position, and lowering the pin 1352 allows the pin to be inserted into the groove of the spiral staircase, thereby positioning the support device.

[0077] The second way to set the positioning pin 13, such as Figure 7 As shown, the positioning pin 13 includes a threaded through groove 126 on the inclined base 12 and a bolt adapted to the threaded through groove 126. Rotating the bolt allows the end of the bolt away from the nut to extend out of or retract into the threaded through groove 126 away from the column 2. A recess 124 is provided on the thicker side of the inclined base 12, and the threaded through groove 126 is located within this recess 124. In use, rotating the bolt allows the side of the bolt away from the nut to extend out of the threaded through groove 126 and insert into the groove of the spiral staircase, thus positioning the support device. When not in use, rotating the bolt allows it to be further retracted into the recess 124, with the end of the bolt away from the nut fully inserted into the threaded through groove 126.

[0078] In some possible implementations, the inclined base 12 includes a connecting surface, one end of which is hinged to the inclined support surface 121, and the other end is slidably connected to the side of the mating surface 122 opposite to the column. The mating surface 122 is hinged to the inclined support surface 121, and the mating surface 122 is provided with a groove perpendicular to the extension direction of the column. The connecting surface can slide along the groove and be positioned at any position within the groove. Thus, the angle of the inclined support surface 121 can be adjusted by adjusting the mating position of the connecting surface and the mating surface 122, thereby providing support by adjusting the stair slope to accommodate different angles.

[0079] The preferred embodiments disclosed above are merely illustrative of this application. The preferred embodiments do not exhaustively describe modifications and variations. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A temporary support device for assembling a steel spiral staircase, characterized in that, include: Bottom support; A column, which is connected to the bottom support; The top adjustment seat has a seat body, a lifting assembly, and a swing assembly. The seat body is connected to the column. The lifting assembly is slidably connected to the seat body and can move up and down along the seat body and be fixed. The swing assembly is connected to the lifting assembly and can swing oscillatingly connected to the lifting assembly and can be fixed to the lifting assembly. A support plate, the support plate being connected to the swing assembly, the swing assembly being able to adjust the angle of the support plate by swinging; The base includes a base plate and a guide frame; The base plate is vertically connected to the column; The guide frame is vertically connected to the base plate, and the guide frame is provided with multiple positioning holes, which are arranged at intervals along the height direction of the column. The lifting assembly is slidably connected to the guide frame, and the fastener can pass through the lifting assembly at one end and be connected to the corresponding positioning hole to fix the height of the lifting assembly; The guide frame includes two side guide plates and one middle plate; The two side guide plates are parallel; The intermediate plate is located between the two side guide plates and is connected to the two side guide plates respectively; Two sliding grooves are provided on the side guide plate, and the two sliding grooves are located on both sides of the middle plate along the thickness direction. A plurality of positioning holes are provided on the side guide plate between the two sliding grooves, and each positioning hole is arranged at intervals along the movement direction of the lifting assembly. The lifting assembly is arranged through the two slides, and the fastener can pass through the lifting assembly at one end and be connected to the corresponding positioning hole. The lifting assembly includes two inner side plates and two outer side fixing frames; The two inner side plates are located between the two side guide plates and are respectively disposed on both sides of the middle plate along the thickness direction; The outer fixing frame includes an outer end plate and two sliding plates vertically connected to the outer end plate. The outer end plate is located outside the side guide plate. The two sliding plates pass through two grooves on the corresponding side guide plates and are respectively connected to the corresponding inner side plates. One end of the fastener can pass through the outer end plate and connect to the corresponding positioning hole; Trapezoidal positioning grooves are provided on both end faces of the inner side plate; A trapezoidal slider is provided on the side of the skateboard away from the outer end plate; The trapezoidal slider is inserted into the trapezoidal positioning groove; The positioning element is inserted through the inner side plate and the trapezoidal slider along the thickness direction of the inner side plate to fix the inner side plate and the trapezoidal slider.

2. The temporary support device for assembling a steel spiral staircase according to claim 1, characterized in that, The swing assembly is hinged to the inner side plate; Multiple prepositioning slots are provided on the inner side plate, and each prepositioning slot is arranged sequentially along the circumferential direction of the swing axis of the swing assembly. The swing component is provided with positioning protrusions, and during the swinging process of the swing component, the positioning protrusions are sequentially engaged into each of the prepositioning slots; In this process, after the positioning protrusion is engaged in the prepositioning groove, the swing assembly is also welded to the inner side plate.

3. The temporary support device for assembling a steel spiral staircase according to claim 2, characterized in that, The swing assembly is hinged to the inner side plate; Multiple fixing holes are provided on the inner side plate, and each fixing hole is arranged sequentially along the circumference of the swing axis of the swing assembly; The swing assembly is provided with positioning and mating holes, and during the swinging process of the swing assembly, the positioning and mating holes are connected to each of the fixing holes in sequence; The positioning element can be inserted into the positioning mating hole and the corresponding fixing hole to fix the angle of the swing assembly.

4. The temporary support device for assembling a steel spiral staircase according to claim 1, characterized in that, The support plate includes a central support plate and two side support plates, with the two side support plates respectively hinged to both sides of the central support plate; The central support plate is connected to the swing assembly; The support plate has a folded state and an unfolded state. In the folded state, both side support plates are attached to the outer wall surface of the middle support plate in the vertical thickness direction. In the unfolded state, both side support plates are unfolded to the plane where the middle support plate is located.

5. The temporary support device for assembling a steel spiral staircase according to claim 1, characterized in that, The bottom support includes a flat base and an inclined base. The flat base is fixedly connected to the column, and the inclined base is detachably connected to the flat base. The inclined base has an inclined support surface, and the inclined support surface and the flat base have an included angle.

6. The temporary support device for assembling a steel spiral staircase according to claim 5, characterized in that, The inclined base is thick at one end and thin at the other end, and a positioning pin is provided on the thick end of the inclined base.

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