Inner formwork for continuous beam cantilever casting construction

Abstract

The utility model provides an inner formwork for continuous beam suspension casting construction, which belongs to the technical field of continuous beam construction and comprises a support, a plurality of jacking pieces and a plurality of jacking components. Wherein the supporting parts are arranged on the support in a sliding mode and arranged on the periphery of the support in a surrounding mode, each supporting part is provided with a supporting face facing the outer portion of the support, and each supporting face is used for supporting a steel formwork in a supporting mode. The multiple jacking assemblies are arranged on the support, correspond to the jacking and supporting pieces one to one and are used for pushing the jacking and supporting pieces to abut against the steel formwork. A plurality of positioning tooth grooves are evenly distributed in the positions, corresponding to the moving track of each jacking and supporting piece, of the support, each jacking and supporting piece is provided with a one-way locking piece, the one-way locking piece has the elastic freedom degree of moving towards the corresponding positioning tooth groove, and the one-way locking piece is suitable for being meshed with any positioning tooth groove. According to the inner formwork for the continuous beam suspension casting construction, a large number of complex splicing work of steel pipes and fasteners is not needed, and the building process of the inner formwork is more convenient and rapider.

Description

Technical Field

[0001] This utility model belongs to the field of continuous beam construction technology, and more specifically, it relates to an internal formwork for continuous beam cantilever construction. Background Technology

[0002] Continuous beams are a common bridge structure widely used in highway and railway construction. The cantilever construction of continuous beams refers to a construction method in which working platforms are set up on both sides of the piers, and cement concrete beams are poured segment by segment towards the mid-span cantilever in a balanced manner, with prestressing applied segment by segment. This method uses a pair of movable formworks, with the formwork set on the formworks. After the construction of one segment is completed, the formworks move symmetrically forward one segment to construct the next pair of beam segments, proceeding sequentially until the cantilever beam segment is completed.

[0003] Internal formwork is the main tooling used in the construction of continuous beam cantilever construction. It primarily consists of steel formwork and formwork support frames. The formwork support frames are generally assembled from steel pipes and fasteners to form scaffolding, used to support the steel formwork in the vertical and horizontal directions, thus facilitating concrete construction. A problem with this is that assembling and erecting the formwork support frames is cumbersome and inconvenient, resulting in a heavy workload for construction workers and low construction efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an internal formwork frame for continuous beam cantilever construction, which is designed to facilitate the support of steel formwork.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an inner formwork for continuous beam cantilever construction, comprising:

[0006] support;

[0007] Multiple support members are slidably mounted on the bracket and surround the periphery of the bracket. Each support member has a support surface facing outward from the bracket, and each support surface is used to support the steel formwork.

[0008] Multiple clamping components are mounted on the bracket and correspond one-to-one with the top support members, used to push the top support members against the steel template;

[0009] The bracket has multiple positioning grooves evenly distributed on the movement trajectory of each top support member. Each top support member is provided with a one-way locking member. The one-way locking member has an elastic degree of freedom to move toward the positioning groove. The one-way locking member is adapted to engage with any of the positioning grooves.

[0010] The positioning groove has a guide slope so that when the top support slides toward the periphery of the bracket, the one-way locking member moves along the guide slope and disengages from the positioning groove.

[0011] The positioning groove also has a blocking surface, so that when the top support slides into the inner cavity of the bracket, the one-way locking member abuts against the blocking surface and engages in the positioning groove.

[0012] In one possible implementation, the support includes:

[0013] Base frame;

[0014] Multiple adjustment brackets are slidably mounted on the base frame, and each adjustment bracket corresponds to one of the top support members, with the sliding direction being the same as that of the top support members;

[0015] The top support is mounted on the corresponding adjustment frame, and the clamping assembly is located between the base frame and the adjustment frame to push the adjustment frame to move so that the top support is pressed against the steel template.

[0016] In one possible implementation, the clamping component includes:

[0017] A threaded sleeve is rotatably mounted on the base frame;

[0018] The threaded rod is fixedly mounted on the adjusting frame and is threadedly connected to the threaded sleeve.

[0019] In one possible implementation, the bracket further includes a connecting rod fixedly mounted on the adjustment frame;

[0020] A connecting sleeve suitable for sliding connection with the connecting rod is fixedly provided on the top support.

[0021] In one possible implementation, the positioning grooves are evenly distributed along the axis of the connecting rod, and the one-way locking element includes:

[0022] A pawl is hinged to the connecting sleeve and engages with the positioning tooth groove;

[0023] An elastic element, disposed between the pawl and the connecting sleeve, is used to push the pawl to swing toward the connecting rod.

[0024] In one possible implementation, the pawl has a first state, a second state, and a third state, and the connecting sleeve is provided with a control element for controlling the pawl to switch between the first state, the second state, and the third state;

[0025] In the first state, the pawl engages with the positioning tooth groove and can rotate freely, and the top support can extend away from the bracket;

[0026] In the second state, the pawl engages with the positioning tooth groove and cannot rotate, and the relative position of the top support and the bracket is fixed;

[0027] In the third state, the pawl disengages from the positioning tooth groove and cannot rotate, and the top support can retract towards the bracket.

[0028] In one possible implementation, an extension is fixedly provided on the pawl, and the extension and the pawl are respectively located on both sides of the hinge axis of the pawl;

[0029] When the pawl engages with the positioning tooth groove, the pawl retracts into the connecting sleeve, and the extension extends outward from the connecting sleeve at an angle.

[0030] When the pawl disengages from the positioning tooth groove, the pawl extends outward from the connecting sleeve at an angle, and the extension retracts into the connecting sleeve.

[0031] The control component is a control ring threaded onto the outer peripheral wall of the connecting sleeve. The control ring moves axially along the connecting sleeve to extend or retract the pawl and the extension portion onto the connecting sleeve.

[0032] In one possible implementation, the pawl is in the first state when the control ring moves to disengage from the pawl and the extension.

[0033] In one possible implementation, the pawl is in the second state when the control ring moves to the inner peripheral wall and abuts against the pawl.

[0034] In one possible implementation, the pawl is in the third state when the control ring moves to the inner peripheral wall and abuts against the extension.

[0035] This utility model provides an internal formwork frame for continuous beam cantilever construction. Compared with existing technologies, its advantages are as follows: In actual construction, when an internal formwork frame needs to be erected to support steel formwork for concrete construction, construction workers only need to place the support in a suitable position and then slide the top support component to roughly correspond to the part of the steel formwork that needs support. As the top support component slides closer to the support, the one-way locking component automatically engages with the corresponding positioning groove, allowing the top support component to accurately reach and be fixed in the required position. Then, the top support component is pushed using the tightening component to firmly press against the steel formwork, thus effectively supporting the steel formwork. Compared with traditional assembled scaffold-style formwork support frames, this method eliminates the need for extensive and complex assembly of steel pipes and fasteners, greatly reducing the workload of assembly and erection, significantly improving construction efficiency, and making the erection process of the internal formwork frame more convenient and faster. It can provide support for the steel formwork in continuous beam cantilever construction more promptly, ensuring the construction progress. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the overall structure of an inner formwork for continuous beam cantilever construction provided in this embodiment of the utility model;

[0038] Figure 2 A sectional view of an inner formwork for continuous beam cantilever construction provided in an embodiment of this utility model;

[0039] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0040] In the diagram: 1. Bracket; 11. Positioning groove; 12. Base frame; 13. Adjustment frame; 14. Connecting rod; 15. Guide rod; 2. Top support; 21. Connecting sleeve; 22. Guide tube; 3. One-way locking component; 31. Pawl; 311. Extension; 32. Elastic component; 41. Threaded sleeve; 42. Threaded rod; 5. Control ring. Detailed Implementation

[0041] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0042] Please see Figure 1 and Figure 2 This invention provides an internal formwork frame for continuous beam cantilever construction. The internal formwork frame includes a support 1, multiple top supports 2, and multiple clamping components. The multiple top supports 2 are slidably mounted on the support 1 and surround the periphery of the support 1. Each top support 2 has a top support surface facing outwards from the support 1, and each top support surface is used to support the steel formwork. The multiple clamping components are mounted on the support 1 and correspond one-to-one with the top supports 2, used to push the top supports 2 against the steel formwork.

[0043] Specifically, by setting multiple top support components 2 to slide and be positioned on the periphery of the support frame 1, the cumbersome traditional method of assembling scaffolding using steel pipes and fasteners for formwork support is eliminated. During the actual construction of the inner formwork frame, workers only need to place the support frame 1 in the appropriate position, and then slide each top support component 2 along the support frame 1 to roughly correspond to the part of the steel formwork that needs support. Next, using the corresponding tightening components, the top support component 2 is pushed to press its top surface against the steel formwork, thus completing the support of the steel formwork. This method is convenient and quick, greatly reducing the workload of construction workers and significantly improving construction efficiency.

[0044] Please see Figure 3 The bracket 1 has multiple positioning grooves 11 evenly distributed on the movement trajectory of each top support 2. Each top support 2 is provided with a one-way locking member 3. The one-way locking member 3 has an elastic degree of freedom to move toward the positioning groove 11. The one-way locking member 3 is suitable for engaging with any positioning groove 11.

[0045] The positioning groove 11 has a guide ramp so that when the top support 2 slides toward the periphery of the bracket 1, the one-way locking member 3 moves along the guide ramp and disengages from the positioning groove 11. The positioning groove 11 also has a blocking straight surface so that when the top support 2 slides toward the inner cavity of the bracket 1, the one-way locking member 3 abuts against the blocking straight surface and engages in the positioning groove 11.

[0046] Specifically, when the top support 2 slides towards the periphery of the support 1, the one-way locking member 3 moves along the guide slope and disengages from the positioning tooth groove 11. As the top support 2 continues to move, the one-way locking member 3 will slide in and out of multiple positioning tooth grooves 11 in sequence, thus allowing the top support 2 to move smoothly towards the periphery of the support 1 and approach the steel formwork. When the top support 2 slides into the inner cavity of the support 1, the one-way locking member 3 will abut against the blocking straight surface, thereby preventing the top support 2 from moving. This ensures that even if it is disturbed by external forces during subsequent construction, the top support 2 can remain stably in the locked position, continuously providing reliable support for the steel formwork, effectively preventing the steel formwork from loosening or shifting, and ensuring the stability of the steel formwork during concrete construction.

[0047] In some embodiments, see Figure 1 and Figure 2 The support frame 1 includes a base frame 12 and multiple adjusting frames 13. The adjusting frames 13 are slidably mounted on the base frame 12, and each adjusting frame 13 corresponds to a top support 2, with the sliding direction being the same as that of the top support 2. The top support 2 is mounted on its corresponding adjusting frame 13, and a clamping assembly is positioned between the base frame 12 and the adjusting frame 13 to push the adjusting frame 13 to move, thereby pressing the top support 2 against the steel template.

[0048] In actual construction, after the position of the top support 2 needs to be adjusted according to the specific shape, size or support requirements of different parts of the steel formwork, the adjusting frame 13 is moved by the tightening component. Since the adjusting frame 13 corresponds one-to-one with the top support 2 and the sliding direction is the same, it can drive the top support 2 to move synchronously, thereby adjusting the position of the top support 2 again, so that the top support surface of the top support 2 is pressed against the steel formwork, forming effective support for the steel formwork and preventing the steel formwork from loosening or shifting during use.

[0049] In some embodiments, see Figure 1 and Figure 2 The clamping assembly includes a threaded sleeve 41 and a threaded rod 42. The threaded sleeve 41 is rotatably mounted on the base frame 12. The threaded rod 42 is fixedly mounted on the adjusting frame 13 and is threadedly connected to the threaded sleeve 41.

[0050] Specifically, when it is necessary to push the top support 2 against the steel formwork, the construction workers rotate the threaded sleeve 41. Due to the threaded connection between the threaded sleeve 41 and the threaded rod 42, the threaded rod 42 will move the adjusting frame 13 as the threaded sleeve 41 rotates, thereby pushing the top support 2, which is set on the adjusting frame 13, to move closer to the steel formwork. Finally, the top support surface of the top support 2 is pressed against the steel formwork, achieving effective support for the steel formwork. At the same time, the construction workers can precisely adjust the degree to which the top support 2 presses against the steel formwork by controlling the rotation angle of the threaded sleeve 41, according to the actual required support force of the steel formwork, thereby providing appropriate support force.

[0051] In some embodiments, see Figure 1 and Figure 2 The bracket 1 also includes a connecting rod 14 and a guide rod 15 fixedly mounted on the adjustment frame 13. The top support 2 is fixedly provided with a connecting sleeve 21 adapted to slide with the connecting rod 14 and a guide tube 22 adapted to slide with the guide rod 15. The connecting rod 14 and the guide rod 15 are correspondingly arranged, and the connecting rod 14 and the corresponding guide rod 15 are parallel to each other.

[0052] During actual construction, when the adjusting frame 13 slides on the base frame 12, the top support 2 slides synchronously with the adjusting frame 13 because it is slidably connected to the connecting rod 14 through the connecting sleeve 21, thus achieving coordinated movement between the top support 2 and the adjusting frame 13. Simultaneously, the slidable connection between the guide rod 15 and the connecting sleeve 21 guides the top support 2, increasing its stability during sliding and preventing swaying or displacement.

[0053] In some embodiments, see Figure 3 The positioning tooth grooves 11 are evenly distributed along the axis of the connecting rod 14, and the one-way locking member 3 includes a pawl 31 and an elastic member 32. The pawl 31 is hinged to the connecting sleeve 21 and engages with the positioning tooth grooves 11. The elastic member 32 is disposed between the pawl 31 and the connecting sleeve 21 and is used to push the pawl 31 to swing towards the connecting rod 14.

[0054] For example, the elastic element 32 is a spring sheet, one end of which is fixedly mounted on the connecting sleeve 21, and the other end of which abuts against the pawl 31, thereby pushing the pawl 31 to swing toward the connecting rod 14.

[0055] When the top support 2 is slid outwards towards the outer edge of the bracket 1, the pawl 31 moves along the guide slope of the positioning groove 11 as the top support 2 moves. After overcoming the thrust of the elastic element 32 and the friction with the positioning groove 11, the pawl 31 disengages from the positioning groove 11, unlocking the top support 2 and allowing for position adjustment. When the top support 2 slides to the appropriate position to abut against the steel formwork, the pawl 31, under the action of the elastic element 32, engages with the positioning groove 11, achieving precise positioning and locking of the top support 2. This ensures that the top support 2 can be stably held in the required position, providing reliable support for the steel formwork.

[0056] The one-way locking mechanism using pawl 31 and elastic element 32 ensures the stable locking of top support 2 under normal working conditions, while also providing the possibility of flexible adjustment when needed. This allows the inner formwork to better adapt to the different support requirements of steel formwork in continuous beam cantilever construction, thus improving the practicality and adaptability of the inner formwork.

[0057] In some embodiments, the pawl 31 has a first state, a second state, and a third state, and the connecting sleeve 21 is provided with a control element for controlling the pawl 31 to switch between the first state, the second state, and the third state.

[0058] In the first state, the pawl 31 engages with the positioning tooth groove 11 and can rotate freely, allowing the top support 2 to extend away from the bracket 1. In this state, when the top support 2 is moved towards the periphery of the bracket 1, the top support 2 can move without restriction. Once the top support 2 has moved to the desired position, the engagement of the pawl 31 with the positioning tooth groove 11 ensures that the top support 2 remains stable in that position.

[0059] In the second state, the pawl 31 engages with the positioning tooth groove 11 and cannot rotate, fixing the relative position of the top support 2 and the bracket 1. In this state, the top support 2 is in a stable locked position, maintaining its stable position and providing reliable support for the steel formwork during construction. This effectively prevents the steel formwork from loosening or shifting, ensuring its stability during concrete construction and thus guaranteeing the quality of concrete pouring and the construction quality of the continuous beam.

[0060] In the third state, the pawl 31 disengages from the positioning tooth groove 11 and cannot rotate, allowing the top support 2 to retract towards the bracket 1. After construction is completed, the pawl 31 can be switched to the third state. In this state, the position of the top support 2 on the connecting rod 14 can be changed at will, making it easy to retract the top support 2. This facilitates the storage, transportation, and other subsequent operations of the inner mold frame, improving the convenience of using the inner mold frame and its overall practicality.

[0061] In some embodiments, see Figure 3 An extension 311 is fixedly provided on the pawl 31, and the extension 311 and the pawl 31 are located on both sides of the hinge axis of the pawl 31. When the pawl 31 engages with the positioning tooth groove 11, the pawl 31 retracts into the connecting sleeve 21, and the extension 311 extends outward from the connecting sleeve 21 at an angle. When the pawl 31 disengages from the positioning tooth groove 11, the pawl 31 extends outward from the connecting sleeve 21 at an angle, and the extension 311 retracts into the connecting sleeve 21. The control component is a control ring 5 threaded onto the outer peripheral wall of the connecting sleeve 21. The control ring 5 moves axially along the connecting sleeve 21 to extend or retract the pawl 31 and the extension 311 on the connecting sleeve 21. In actual operation, the construction personnel only need to rotate the control ring 5 to move it axially to control the pawl 31, thereby facilitating the adjustment of the top support 2.

[0062] Specifically, when the control ring 5 moves to disengage from the pawl 31 and the extension 311, the pawl 31 engages with the positioning tooth groove 11 under the action of the elastic member 32, which puts the pawl 31 in the first state, making it convenient for construction personnel to move the top support 2 to the periphery of the bracket 1.

[0063] Specifically, when the control ring 5 moves to the inner peripheral wall and abuts against the pawl 31, the control ring 5 presses the pawl 31 into the connecting sleeve 21, which makes the pawl 31 engage with the positioning tooth groove 11. Under the restriction of the control ring 5, the pawl 31 cannot disengage from the positioning tooth groove 11. At this time, the pawl 31 is in the second state, which prevents the top support 2 from moving on the connecting rod 14, thus ensuring the stability of the position of the top support 2.

[0064] Specifically, when the control ring 5 moves to the point where it abuts against the inner peripheral wall and the extension 311, the control ring 5 presses the extension 311 into the connecting sleeve 21, while the pawl 31 extends out of the connecting sleeve 21 and disengages from the positioning tooth groove 11. At this time, the pawl 31 is in the third state, which means there is no restriction between the top support 2 and the connecting rod 14, and the top support 2 can move freely along the connecting rod 14, thereby enabling the top support 2 to be retracted, facilitating subsequent operations such as storage and transportation of the inner mold frame.

[0065] Optionally, the control component can also be a clamp, which is arranged around the outer peripheral wall of the connecting sleeve 21. By changing the position of the clamp on the connecting sleeve 21, the pawl 31 can be in different states. When the inner peripheral wall of the clamp is not in contact with the pawl 31 and the extension 311, the pawl 31 is in the first state. When the inner peripheral wall of the clamp abuts against the pawl 31, the pawl 31 is in the second state. When the inner peripheral wall of the clamp abuts against the extension 311, the pawl 31 is in the third state.

[0066] In summary, the internal formwork for continuous beam cantilever construction provided by this utility model, compared with the prior art, changes the cumbersome traditional method of assembling scaffolding with steel pipes and fasteners by setting multiple top support members 2 to slide on the support 1 and surround the support 1. During actual construction, the workers only need to place the support 1 in a suitable position, and then slide each top support member 2 along the support 1 to roughly correspond to the part of the steel formwork that needs support. Then, using the corresponding tightening components, the top support members 2 are pushed to press their top surfaces against the steel formwork, thus completing the support of the steel formwork. This method eliminates the need for a large amount of complex steel pipe and fastener assembly work as in the past, greatly reducing the workload of construction workers, significantly improving construction efficiency, and making the construction of the internal formwork more convenient and faster.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An internal formwork for continuous beam cantilever construction, characterized in that, include: Support (1); Multiple top support members (2) are slidably disposed on the bracket (1) and surround the periphery of the bracket (1). Each top support member (2) has a top support surface facing the outside of the bracket (1), and each top support surface is used to support the steel template. as well as Multiple clamping components are installed on the bracket (1) and correspond one-to-one with the top support (2) to push the top support (2) against the steel template; Among them, the bracket (1) has a plurality of positioning grooves (11) evenly distributed on the movement trajectory of each of the top support members (2), and each of the top support members (2) is provided with a one-way locking member (3). The one-way locking member (3) has an elastic degree of freedom to move toward the positioning groove (11), and the one-way locking member (3) is adapted to engage with any of the positioning grooves (11). The positioning groove (11) has a guide slope so that when the top support (2) slides toward the periphery of the bracket (1), the one-way locking member (3) moves along the guide slope and disengages from the positioning groove (11); The positioning groove (11) also has a blocking surface so that when the top support (2) slides into the inner cavity of the bracket (1), the one-way locking member (3) abuts against the blocking surface and engages in the positioning groove (11).

2. The inner formwork for continuous beam cantilever construction as described in claim 1, characterized in that, The support (1) includes: Base frame (12); Multiple adjustment frames (13) are slidably mounted on the base frame (12). Each adjustment frame (13) corresponds to one of the top support members (2), and the sliding direction is the same as the sliding direction of the top support member (2). The top support (2) is disposed on the corresponding adjustment frame (13), and the tightening assembly is disposed between the base frame (12) and the adjustment frame (13) for pushing the adjustment frame (13) to move so that the top support (2) abuts against the steel template.

3. The inner formwork for continuous beam cantilever construction as described in claim 2, characterized in that, The clamping assembly includes: A threaded sleeve (41) is rotatably mounted on the base frame (12); The threaded rod (42) is fixedly mounted on the adjustment frame (13) and threadedly connected to the threaded sleeve (41).

4. The inner formwork for continuous beam cantilever construction as described in claim 2, characterized in that, The bracket (1) also includes a connecting rod (14) fixedly mounted on the adjustment frame (13). A connecting sleeve (21) suitable for sliding connection with the connecting rod (14) is fixedly provided on the top support (2).

5. The inner formwork for continuous beam cantilever construction as described in claim 4, characterized in that, The positioning grooves (11) are evenly distributed along the axis of the connecting rod (14), and the one-way locking member (3) includes: A pawl (31) is hinged to the connecting sleeve (21) and engages with the positioning tooth groove (11); An elastic element (32) is disposed between the pawl (31) and the connecting sleeve (21) for pushing the pawl (31) to swing toward the connecting rod (14).

6. The inner formwork for continuous beam cantilever construction as described in claim 5, characterized in that, The pawl (31) has a first state, a second state and a third state, and the connecting sleeve (21) is provided with a control element for controlling the pawl (31) to switch between the first state, the second state and the third state; In the first state, the pawl (31) engages with the positioning tooth groove (11) and can rotate freely, and the top support (2) can extend away from the bracket (1); In the second state, the pawl (31) engages with the positioning tooth groove (11) and cannot rotate, and the relative position of the top support (2) and the bracket (1) is fixed; In the third state, the pawl (31) disengages from the positioning groove (11) and cannot rotate, and the top support (2) can retract toward the bracket (1).

7. The inner formwork for continuous beam cantilever construction as described in claim 6, characterized in that, An extension (311) is fixedly provided on the pawl (31), and the extension (311) and the pawl (31) are respectively located on both sides of the hinge axis of the pawl (31). When the pawl (31) engages with the positioning tooth groove (11), the pawl (31) retracts into the connecting sleeve (21), and the extension (311) extends outward from the connecting sleeve (21); When the pawl (31) disengages from the positioning groove (11), the pawl (31) extends outward from the connecting sleeve (21) at an angle, and the extension (311) retracts into the connecting sleeve (21); The control element is a control ring (5) threaded onto the outer peripheral wall of the connecting sleeve (21). The control ring (5) moves axially along the connecting sleeve (21) so that the pawl (31) and the extension (311) extend or retract on the connecting sleeve (21).

8. The internal formwork for continuous beam cantilever construction as described in claim 7, characterized in that, When the control ring (5) moves to disengage from the pawl (31) and the extension (311), the pawl (31) is in the first state.

9. The inner formwork for continuous beam cantilever construction as described in claim 7, characterized in that, When the control ring (5) moves to the inner peripheral wall and abuts against the pawl (31), the pawl (31) is in the second state.

10. The inner formwork for continuous beam cantilever construction as described in claim 7, characterized in that, When the control ring (5) moves to the point where its inner peripheral wall abuts against the extension (311), the pawl (31) is in the third state.

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