A telescopic elevator shaft pouring mold support system

Abstract

The application relates to an expansion and contraction type elevator shaft pouring mold support system, belonging to the field of concrete building construction, which comprises a hanging bracket and multiple top supporting pieces, the hanging bracket is provided with an expansion and contraction mechanism, the expansion and contraction mechanism is used for controlling the movement of the top supporting pieces close to or away from the hanging bracket, and the top supporting pieces are used for abutting against a mold plate. The synchronous movement of the multiple top supporting pieces can realize the uniform expansion and contraction change of the mold plate support structure, can form a stable support effect for the elevator shaft mold plate, and can provide convenience for on-site operation.

Description

Technical Field

[0001] This application relates to the field of concrete building construction, and in particular to a support system for a retractable elevator shaft casting formwork. Background Technology

[0002] An elevator shaft is the passageway through which a car-type elevator goes up or down. An elevator shaft is a vertical shaft with a concrete structure, which is generally formed by pouring concrete in layers from bottom to top.

[0003] When pouring concrete, a concrete pouring formwork platform needs to be built. The most common method is to use steel pipes, fasteners, wooden boards, etc., to build a keel support system to support and reinforce the formwork. This traditional support system is fragmented, has low assembly efficiency, and requires different specifications and quantities of overlapping parts for cast-in-place walls of different shapes and cross-sectional dimensions. This not only results in high costs and a large workload, but also poses significant safety hazards due to the simple platform built. Summary of the Invention

[0004] To address the aforementioned issues, this application provides an expandable / retractable elevator shaft casting mold support system.

[0005] The expansion and contraction elevator shaft casting mold support system provided in this application adopts the following technical solution:

[0006] An expandable and retractable elevator shaft casting formwork support system includes a hanger and multiple top supports. The hanger is equipped with an expansion and retraction mechanism, which is used to control the movement of the top supports closer to or further away from the hanger. The top supports are used to abut against the formwork.

[0007] By adopting the above technical solution, the suspension hanger suspends the top support and expansion mechanism at the formwork, and then the expansion mechanism brings each top support close to and abuts against the formwork to provide support. This is faster than building a keel support system.

[0008] Preferably, the expansion and contraction mechanism includes telescopic rods and a drive assembly. The number of top support members is the same as the number of telescopic rods. Each top support member abuts against a template and is connected to a telescopic rod. The drive assembly is used to control all telescopic rods to move synchronously closer to or away from the hanger. The direction of movement of the telescopic rods is perpendicular to the surface of the template.

[0009] Preferably, the drive assembly includes a drive rod, a drive screw, and a transmission gear set. The drive rod and the drive screw are both rotatably connected to the hanger. The telescopic rod is coaxially threadedly connected to the drive screw. The transmission gear set is used to transmit torque from the drive rod to the drive screw.

[0010] By adopting the above technical solution, under the action of the drive component, the telescopic rods around the hanger move synchronously in a directional manner, so that each top support component around the hanger moves synchronously away from or towards the template, thereby realizing the expansion and contraction of the overall shape.

[0011] Preferably, the number of top supports is four, and the four top supports are arranged in a circular array around the hanger. Each top support includes a contact plate and an overlapping plate that are fixedly connected to each other. The surfaces of the contact plate and the overlapping plate of a single top support are perpendicular to each other. The contact plate overlaps with and slides relative to the overlapping plate of the adjacent top support. The sliding direction is parallel to the surfaces of the two plates. The contact plate abuts against the template. The overlapping plate is connected to a telescopic rod. The end of the telescopic rod away from the hanger is connected to a connecting rod. The connecting rod is slidably connected to the overlapping plate. The sliding direction is parallel to the sliding direction of the overlapping plate relative to the contact plate.

[0012] By adopting the above technical solution, for an elevator shaft with a rectangular cross-section, the movement direction of the four telescopic rods is perpendicular to the four inner walls of the elevator shaft. Adjacent top support members can achieve lateral relative sliding through the sliding cooperation of the contact plate and the overlapping plate. Therefore, under the action of the telescopic rods, each top support member moves obliquely, ultimately achieving uniform overall shape expansion and contraction changes.

[0013] Preferably, the length direction of the connecting rod is vertical, and a support block is fixedly connected to the bottom end of the connecting rod. A pre-embedded box is embedded on the inner wall of the elevator shaft at a position lower than the template. When the contact plate abuts against the template, the support block is inserted into the pre-embedded box.

[0014] By adopting the above technical solution, the embedded box forms a gravity support point on the inner wall of the elevator shaft, and the support block rests on the gravity support point provided by the embedded box, so that each top support component can exist stably in the elevator shaft.

[0015] Preferably, the connecting rod is fixedly connected to a mounting base on the side away from the top support member. The mounting base has a mounting groove for inserting the telescopic rod. The mounting base is threaded with a mounting bolt, which passes through the telescopic rod radially.

[0016] By adopting the above technical solution, the mating structure at the mounting base is used to realize the connection and detachment of the top support and the expansion and contraction mechanism.

[0017] Preferably, a shaping rod is slidably disposed on the overlapping plate, the sliding direction of the shaping rod is consistent with the sliding direction of the overlapping plate relative to the contact plate, one end of the shaping rod abuts against the side of the overlapping plate of the adjacent top support member away from the template, the side of the overlapping plate away from the template is provided with an abutment groove, the abutment groove is for the end of the shaping rod to be inserted, the top support member is provided with a control device for controlling the relative fixation of the shaping rod, the mounting base is provided with a disassembly notch on one side of the telescopic rod, the disassembly notch is connected to the mounting groove, the disassembly notch is for the telescopic rod to enter or move out of the mounting groove.

[0018] By adopting the above technical solution, when all the top support components are in contact with the template, and when all the shaping rods extend from the overlapping plate and abut against the overlapping plate of another top support component, a stable balance is established between the top support components. That is, the top support components can be self-tightened and shaped, and the hanger and expansion mechanism can be removed, making more convenient space conditions for on-site operation. Since the disassembly and assembly notch is located on the side of the telescopic rod, the hanger carries the expansion and assembly mechanism to move without connecting the installation bolts, and the telescopic rod can overflow from the disassembly and assembly notch of the installation block into the installation groove.

[0019] Preferably, the control device is a control nut, which is coaxially threadedly connected to the shaping rod, and the control nut abuts against the side edge of the overlapping plate.

[0020] Preferably, multiple shaping rods are vertically arranged, and a synchronization rod is fixedly connected between the multiple shaping rods. The control device includes a ratchet slider, a return spring, a push rod, and an operating screw. The ratchet slider is slidably connected to the overlapping plate, and the sliding direction is perpendicular to the sliding direction of the shaping rod. One end of the return spring is connected to the ratchet slider, and the other end is connected to the overlapping plate. Ratchets are fixedly connected to both the shaping rod and the ratchet slider. The push rod is slidably connected to the overlapping plate, and the sliding direction is vertical. The push rod has a push wedge surface, and the ratchet slider has a force-receiving wedge surface. The operating screw is located at the top of the overlapping plate and is threadedly connected to the overlapping plate. The axis of the operating screw is parallel to the length direction of the push rod. The bottom end of the operating screw abuts or rotates with the top end of the push rod. When the push wedge surface abuts against the force-receiving wedge surface, the push rod applies a thrust to the ratchet slider, and the ratchet of the ratchet slider meshes with the ratchet of the shaping rod.

[0021] By adopting the above technical solutions, both threaded drive and wedge-face ratchet drive can achieve tight contact between the shaping rod and another overlapping plate. The threaded drive has a simple structure and is easy to operate, and can be used when space permits. In the wedge-face ratchet structure, the operating screw is located at the top of the overlapping plate, which is still convenient for the operator to operate even in narrow spaces.

[0022] Preferably, an adjusting rod is selectively connected between the mounting base and the telescopic rod. One end of the adjusting rod is coaxially fixedly connected to a mating sleeve, into which the end of the telescopic rod is inserted. The other end of the adjusting rod is inserted into the mounting groove. The mounting bolt passes through the adjusting rod and is threadedly connected to the mounting base, or the mounting bolt passes through the telescopic rod and is threadedly connected to the mating sleeve.

[0023] By adopting the above technical solution, the top support moves at the same speed and travels the same distance in both the horizontal and vertical directions. For elevator shafts of different lengths and widths, the initial position of the top support relative to the hanger can be changed by adding an adjustment rod to adapt to the formwork support requirements of elevator shafts of different lengths and widths.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By setting up top supports and expansion mechanisms, the suspension hangers suspend the top supports and expansion mechanisms at the formwork. Then, the expansion mechanisms bring each top support close to and abuts against the formwork to provide support. This is faster than building a keel support system.

[0026] 2. By setting up the shaping rods and disassembly notches, after all the top support components abut against the template, the operation control tools and each shaping rod make each pair of adjacent top support components have an abutting effect, and a balanced and stable force state is established between each top support component, so that the top support components can be self-shaped and supported. The hangers and expansion and contraction mechanisms can be temporarily removed, making more convenient space conditions available for on-site operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the expansion and contraction elevator shaft casting mold support system in Embodiment 1 of this application.

[0028] Figure 2 This is a structural cross-sectional schematic diagram of the expansion and contraction elevator shaft casting formwork support system in operation, as shown in Embodiment 1 of this application.

[0029] Figure 3 This is a top view of the support system for the expansion and contraction elevator shaft casting mold in Embodiment 1 of this application.

[0030] Figure 4 This is a structural schematic diagram illustrating the working principle of the expansion and contraction mechanism in Embodiment 1 of this application.

[0031] Figure 5 This is a top view schematic diagram of the structure in Embodiment 1 of this application, illustrating the addition of an adjustment rod between the telescopic rod and the mounting base.

[0032] Figure 6 This is a schematic diagram illustrating the structure of the control device in Embodiment 2 of this application.

[0033] Figure 7 yes Figure 6 A magnified view of part A in the middle.

[0034] Figure 8 This is a cross-sectional view of the structure used to illustrate the working principle of the control device in Embodiment 2 of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Hanger; 2. Top support; 21. Contact plate; 22. Overlapping plate; 221. Shaping rod; 2211. Synchronizing rod; 222. Control nut; 223. Abutment groove; 224. Ratchet slider; 225. Return spring; 226. Push rod; 227. Operating screw; 228. Pushing wedge surface; 229. Force-bearing wedge surface; 23. Connecting rod; 231. Support block; 232. Mounting base; 233. Mounting groove; 234. Disassembly notch; 24. Auxiliary top block; 3. Expansion / retraction mechanism; 31. Telescopic rod; 311. Mounting bolt; 32. Adjusting rod; 321. Mating cylinder; 33. Drive assembly; 331. Drive rod; 332. Drive screw cylinder; 333. Transmission gear set; 4. Template; 5. Elevator shaft; 51. Embedded box. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0037] Example 1:

[0038] This application discloses an expansion and contraction type elevator shaft casting mold support system, such as... Figure 1 and 2 As shown, the system includes a hanger 1, an expansion / contraction mechanism 3, and four top supports 2 arranged in a circular array around the hanger 1. The expansion / contraction mechanism 3 is mounted on the hanger 1 and is used to control the synchronous movement of the four top supports 2 towards or away from the hanger 1. The top supports 2 are used to provide abutment support for the concrete pouring formwork 4 of the elevator shaft 5, ensuring that each formwork 4 remains in a stable position.

[0039] like Figure 1 , 2As shown in Figure 3, the cross-section of the elevator shaft 5 is square, and there are four templates 4, with each template 4 corresponding to one side of the elevator shaft 5. The expansion and contraction mechanism 3 includes telescopic rods 31 and a drive assembly 33. The number of top support members 2 is the same as the number of telescopic rods 31. The four telescopic rods 31 are also arranged in a circular array around the hanger 1. The drive assembly 33 is used to control the four telescopic rods 31 to move synchronously closer to or away from the hanger 1. Each top support member 2 abuts against one template 4, and each top support member 2 is connected to one telescopic rod 31. That is, the telescopic rods 31, top support members 2, and templates 4 correspond one-to-one. The direction of movement of the telescopic rods 31 is perpendicular to the surface of the template 4 corresponding to it. The top support 2 includes a contact plate 21 and an overlapping plate 22 fixedly connected to each other. The surfaces of the contact plate 21 and the overlapping plate 22 are both vertical planes and perpendicular to each other. In the vertical projection, the top support 2 is L-shaped. The contact plate 21 overlaps with the overlapping plate 22 of the adjacent top support 2 and slides relative to each other. The sliding direction is horizontal and parallel to the surfaces of both plates. The contact plate 21 and the corresponding template 4 are parallel and directly abut against each other. A connecting rod 23 is slidably provided on the side of the overlapping plate 22 away from the template 4. Its sliding direction is consistent with the sliding direction of the contact plate 21 relative to the overlapping plate 22. The length direction of the connecting rod 23 is vertical. The connecting rod 23 is used to connect the top support 2 and the telescopic rod 31.

[0040] like Figure 1 and 3 As shown, in order to improve the uniformity of the force distribution of the template 4 under the contact of the top support 2, several auxiliary top blocks 24 are fixedly connected to the overlapping plate 22 of the top support 2 near its own contact plate 21 on the side facing the template 4. The side length of the auxiliary top blocks 24 is the same as the thickness of the contact plate 21, that is, when each contact plate 21 contacts the template 4, each auxiliary top block 24 also abuts against the template 4 at the same time. In order to reduce the load on the hanger 1 and the expansion and contraction mechanism 3, several square weight-reducing holes are provided on the top support 2.

[0041] like Figure 1 , 2As shown in Figure 4, the drive assembly 33 includes a drive rod 331, a drive screw 332, and a transmission gear set 333. Both the drive rod 331 and the drive screw 332 are rotatably connected to the hanger 1. The axial direction of the drive rod 331 is vertical, and its upper end is higher than the upper edge of the top support 2 to facilitate torque operation by the operator. There are also four drive screws 332. The four drive screws 332 are arranged in a cross shape in the middle of the hanger 1. Each drive screw 332 is coaxially threadedly connected to a telescopic rod 31. The transmission gear set 333 functions as a reducer, transmitting torque from the drive rod 331 to each drive screw 332. In this embodiment, the transmission gear set 333 consists of six bevel gears. One bevel gear is coaxial with the bottom end of the drive rod 331, and another bevel gear is coaxially fixed to one of the drive screw 332. These two bevel gears mesh with each other. The remaining four bevel gears are coaxially fixed to the ends of each drive screw 332 and mesh sequentially to form a closed loop. When the drive rod 331 rotates, under the torque transmission action of the transmission gear set 333, all drive screws 332 rotate synchronously, and all telescopic rods 31 move synchronously away from or towards the hanger 1.

[0042] like Figure 2 , 3 As shown in Figure 4, the movement of the telescopic rod 31 applies tension or thrust to the connecting rod 23. Since the movement of the four telescopic rods 31 is synchronized, when the telescopic rod 31 moves away from the hanger 1, each top support 2 is subjected to thrust from two mutually perpendicular directions. Therefore, the direction of movement of the top support 2 forms a 45° angle with the surface of the template 4, and the movement speed of each top support 2 is the same. In a top-down view, the telescopic rod 31 and the connecting rod 23 are always located in the center of the template 4 they are facing.

[0043] like Figure 3 and 4 As shown, a mounting base 232 is fixedly connected to the side of the connecting rod 23 away from the top support 2. The mounting base 232 has a mounting groove 233 for the end of the telescopic rod 31 to be inserted. A mounting bolt 311 is threaded onto the mounting base 232. The normal direction of the length of the mounting bolt 311 is vertical, and it passes through the telescopic rod 31 radially, thereby connecting the connecting rod 23 and the telescopic rod 31. A disassembly notch 234 is provided on the mounting base 232 and on the lateral side of the telescopic rod 31. The disassembly notch 234 communicates with the mounting groove 233. When the mounting bolt 311 is not connected, the disassembly notch 234 allows the telescopic rod 31 to enter or exit the mounting groove 233 laterally.

[0044] like Figure 2As shown, the concrete of elevator shaft 5 is poured layer by layer from bottom to top, that is, one layer of concrete is poured first, and after this layer of concrete has solidified, the next layer of concrete is poured. Several embedded boxes 51 are embedded in the inner wall of elevator shaft 5. After the concrete solidifies, the embedded boxes 51 form grooves in the inner wall of elevator shaft 5. There are four embedded boxes 51 in each layer. The four embedded boxes 51 are located in the center of the four inner walls of elevator shaft 5 and are at the same height. The bottom end of the connecting rod 23 is fixedly connected to a support block 231. The support block 231 extends laterally to the side of the contact plate 21 away from the hanger 1. When the contact plate 21 abuts against the template 4, the support block 231 is inserted into the embedded box 51. At this time, the top support 2 with the connecting rod 23 is given vertical support.

[0045] like Figure 3 and 4 As shown, a shaping rod 221 is slidably mounted on the stacked plate. The sliding direction of the shaping rod 221 is consistent with the sliding direction of the stacked plate 22 relative to the contact plate 21. There are two shaping rods 221 on a single stacked plate 22, and the two stacked plates 22 are distributed along the height direction. The top support 2 is provided with a control device for controlling the relative fixation of the shaping rod 221. The side of the stacked plate 22 away from the template 4 has an abutment groove 223. When each top support 2 abuts against the template 4, the shaping rod 221 slides until its end is inserted into the abutment groove 223 of another stacked plate 22. The control device prevents the shaping rod 221 from moving. The control device is a control nut 222, which is coaxially threaded to the shaping rod 221. When the control nut 222 is rotated to the position where it abuts against the side edge of the stacked plate 22 connected to the shaping rod 221, the shaping rod 221 is in a stable state and can no longer slide. When the shaping rods 221 on the four top support members 2 are all in contact with the overlapping plate 22, the top support members 2 can be self-tightened and shaped, and the hanger 1 and the expansion and contraction mechanism 3 can be removed, making more convenient space conditions for on-site operation.

[0046] like Figure 3 and 5 As shown, according to the working principle of the expansion and contraction mechanism 3, the four telescopic rods 31 move at equal speeds, and the top support 2 moves synchronously in the four positive directions. Therefore, for an elevator shaft 5 with a rectangular cross-section, the initial position of the top support 2 needs to be adjusted. An adjusting rod 32 is selectively connected between the mounting base 232 and the telescopic rods 31. One end of the adjusting rod 32 is coaxially and integrally formed with a mating sleeve 321, which allows the end of the telescopic rod 31 to be inserted. The other end of the adjusting rod 32 is inserted into the mounting groove 233. At this time, the adjusting rod 32, the mounting base 232, the mating sleeve 321, and the telescopic rod 31 can all be simultaneously connected by mounting bolts 311, thus increasing the length of the telescopic rod 31 and adjusting the initial position of the top support 2 connected to it to adapt to the support requirements of the template 4 of elevator shafts 5 with different lengths and widths.

[0047] Example 2:

[0048] like Figure 6 , 7 As shown in Figure 8, the difference from the above embodiment is that the control device in this embodiment includes a ratchet slider 224, a return spring 225, a push rod 226, and an operating screw 227. A synchronizing rod 2211 is fixedly connected between two shaping rods 221 on the same overlapping plate 22, enabling the two shaping rods 221 to move synchronously. The push rod 226 is slidably connected to the overlapping plate 22 in a vertical direction. The operating screw 227 is located at the top of the overlapping plate 22 and threadedly connected to it. The axis of the operating screw 227 is parallel to the length direction of the push rod 226, and the bottom end of the operating screw 227 abuts against the top end of the push rod 226. There are two ratchet sliders 224, with each ratchet slider 224 corresponding to a shaping rod 221. The ratchet slider 224 is located on one side of the shaping rod 221 and is slidably connected to the overlapping plate 22. The sliding direction is horizontal and perpendicular to the sliding direction of the shaping rod 221. One end of the return spring 225 is connected to the ratchet slider 224, and the other end is connected to the overlapping plate 22. Right-angle ratchet teeth are integrally formed on the side wall of the shaping rod 221 and the end of the ratchet slider 224 away from the return spring 225. In the natural state, the return spring 225 applies a pulling force to the ratchet slider 224 to move it away from the shaping rod 221, and the ratchet teeth of the shaping rod 221 and the ratchet teeth of the ratchet slider 224 do not contact each other.

[0049] like Figure 6 , 7 As shown in Figure 8, the push rod 226 passes through the ratchet slider 224. The push rod 226 is provided with a push wedge surface 228, and the ratchet slider 224 is provided with a force-receiving wedge surface 229 on the wall of the hole through which the push rod 226 passes. The push wedge surface 228 and the force-receiving wedge surface 229 abut against each other. When the push rod 226 moves downward, the wedge surface transmission between it and the ratchet slider 224 causes the ratchet slider 224 to tend to move toward the shaping rod 221 until the ratchet of the ratchet slider 224 and the ratchet on the shaping rod 221 mesh. At this time, the ratchet slider 224 applies a pushing force to the shaping rod 221, causing the shaping rod 221 to tend to move close to another overlapping plate 22, thereby achieving the operational purpose of the shaping rod 221 tightening the top support 2.

[0050] Compared to the control nut 222 in Embodiment 1, if the design size of the elevator shaft 5 is smaller, the space covered by the four top support members 2 in the support system is also smaller. When space constraints prevent the operator from easily reaching the lower shaping rod 221, and ordinary tools cannot easily apply torque to the control nut 222, the control tool should adopt the specific form of this embodiment. After each top support member 2 is in place, the operator only needs to pull out the shaping rod 221 first, and then rotate the operating screw 227 located at the top of the overlapping plate 22. The operating screw 227 applies a thrust to the downward push rod 226, and the push rod 226 then pushes the ratchet slider 224 to move through the wedge surface transmission. After the two sets of ratches mesh, the shaping rod 221 is in a state of supporting the overlapping plate 22.

[0051] The implementation principle of the expandable elevator shaft casting formwork support system of this application is as follows:

[0052] Each top support component 2 is assembled onto the expansion and contraction mechanism 3 on the hanger 1. The hanger 1 is then lifted, and the hanger 1 carrying the top support components 2 is moved to the required pouring height using transport equipment. The formwork 4 is erected at the pouring location, and then the expansion and contraction mechanism 3 is operated to make each top support component 2 abut against the inner side of each formwork 4, providing support. Simultaneously, the support leg block 231 is inserted into the embedded box 51. Then, the shaping rod 221 is pulled out, and the control tool is operated to make the shaping rod 221 press tightly against the overlapping plate 22. At this point, the hanger 1 carrying the expansion and contraction mechanism 3 can be removed, and concrete pouring can begin. After pouring is completed, the control tool is operated to release the shaping rod 221, and the four top support components 2 can retract and be removed from the inside.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A support system for a retractable elevator shaft casting mold, characterized in that: The device includes a hanger (1) and multiple top supports (2). The hanger (1) is equipped with an expansion and contraction mechanism (3). The expansion and contraction mechanism (3) is used to control the movement of the top supports (2) closer to or further away from the hanger (1). The top supports (2) are used to abut against the template (4). The expansion and contraction mechanism (3) includes a telescopic rod (31) and a drive assembly (33). The number of top supports (2) is the same as the number of telescopic rods (31). Each top support (2) abuts against one template (4). Each top support (2) is connected to one telescopic rod (31). The drive assembly (33) is used to control the movement of the top supports (2) closer to or further away from the hanger (1). All telescopic rods (31) are controlled to move synchronously closer to or further away from the hanger (1), and the direction of movement of the telescopic rods (31) is perpendicular to the surface of the template (4); there are four top support members (2), which are arranged in a circular array around the hanger (1). Each top support member (2) includes a contact plate (21) and an overlapping plate (22) that are fixedly connected to each other. The surfaces of the contact plate (21) and the overlapping plate (22) of a single top support member (2) are perpendicular to each other. The contact plate (21) overlaps with the overlapping plate (22) of the adjacent top support member (2) and slides relative to each other. The sliding direction is parallel to the surfaces of both plates. The contact plate (21) abuts against the template (4). The overlapping plate (22) is connected to the telescopic rod (31). The end of the telescopic rod (31) away from the hanger (1) is connected to a connecting rod (23). The connecting rod (23) is slidably connected to the overlapping plate (22). The sliding direction is parallel to the sliding direction of the overlapping plate (22) relative to the contact plate (21). The length direction of the connecting rod (23) is vertical. The bottom end of the connecting rod (23) is fixedly connected to a support block (231). The inner wall of the elevator shaft (5) is lower than the template. An embedded box (51) is embedded in the position of the plate (4). When the contact plate (21) abuts against the template (4), the support block (231) is inserted into the embedded box (51). The connecting rod (23) is fixedly connected to the mounting base (232) on the side away from the top support (2). The mounting base (232) is provided with a mounting groove (233) for the telescopic rod (31) to be inserted. The mounting base (232) is threaded with a mounting bolt (311) and the mounting bolt (311) passes through the telescopic rod (31) radially.A shaping rod (221) is slidably disposed on the overlapping plate (22). The sliding direction of the shaping rod (221) is consistent with the sliding direction of the overlapping plate (22) relative to the contact plate (21). One end of the shaping rod (221) abuts against the side of the overlapping plate (22) of the adjacent top support (2) away from the template (4). The side of the overlapping plate (22) away from the template (4) is provided with an abutment groove (223) for the end of the shaping rod (221) to be inserted. The top support (2) is provided with a control device for controlling the relative fixation of the shaping rod (221). A disassembly notch (234) is provided on the mounting base (232) and on one side of the telescopic rod (31). The disassembly notch (234) communicates with the mounting groove (233) for the telescopic rod (31) to enter or exit the mounting groove (233).

2. The expansion and contraction elevator shaft casting formwork support system according to claim 1, characterized in that: The drive assembly (33) includes a drive rod (331), a drive screw (332), and a transmission gear set (333). The drive rod (331) and the drive screw (332) are rotatably connected to the hanger (1). The telescopic rod (31) is coaxially threadedly connected to the drive screw (332). The transmission gear set (333) is used to transmit torque from the drive rod (331) to the drive screw (332).

3. The expansion and contraction elevator shaft casting formwork support system according to claim 1, characterized in that: The control device is a control nut (222), which is coaxially threaded with the shaping rod (221) and abuts against the side edge of the overlapping plate (22).

4. The expansion and contraction elevator shaft casting formwork support system according to claim 1, characterized in that: Multiple shaping rods (221) are arranged vertically, and a synchronization rod (2211) is fixedly connected between the multiple shaping rods (221). The control device includes a ratchet slider (224), a reset spring (225), a push rod (226), and an operating screw (227). The ratchet slider (224) is slidably connected to the overlapping plate (22), and the sliding direction is perpendicular to the sliding direction of the shaping rod (221). One end of the reset spring (225) is connected to the ratchet slider (224), and the other end is connected to the overlapping plate (22). Ratchets are fixedly connected to both the shaping rod (221) and the ratchet slider (224). The push rod (226) is slidably connected to the overlapping plate (22) in a vertical direction. The push rod (226) is provided with a push wedge surface (228), and the ratchet slider (224) is provided with a force-bearing wedge surface (229). The operating screw (227) is located at the top of the overlapping plate (22) and is threadedly connected to the overlapping plate (22). The axis of the operating screw (227) is parallel to the length direction of the push rod (226). The bottom end of the operating screw (227) abuts or rotates with the top end of the push rod (226). When the push wedge surface (228) abuts against the force-bearing wedge surface (229), the push rod (226) applies a thrust to the ratchet slider (224). The ratchet of the ratchet slider (224) meshes with the ratchet on the shaping rod (221).

5. A retractable elevator shaft casting formwork support system according to claim 1 or 4, characterized in that: An adjusting rod (32) is selectively connected between the mounting base (232) and the telescopic rod (31). One end of the adjusting rod (32) is coaxially fixedly connected to a mating sleeve (321). The mating sleeve (321) is for the end of the telescopic rod (31) to be inserted into. The other end of the adjusting rod (32) is inserted into the mounting groove (233). The mounting bolt (311) passes through the adjusting rod (32) and is threadedly connected to the mounting base (232), or the mounting bolt (311) passes through the telescopic rod (31) and is threadedly connected to the mating sleeve (321).

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