Inner supporting device and using method thereof

Abstract

The invention provides an inner supporting device and a using method thereof, and relates to the technical field of inner supporting, the inner supporting device comprises three foot supports, four supporting rods and a locking rod; the three foot supports and one end of the lock rod are sequentially connected through the four supporting rods to form a closed structure in a surrounding mode. The rod end of each supporting rod is rotationally arranged on the corresponding foot support or the corresponding lock rod. When the two supporting rods connected with one section of the lock rod are collinear, the inner supporting device forms a triangular supporting structure with the three foot supports as supporting points, and the triangular supporting structure is used for being supported in a target structure. The locking rod is a telescopic rod, the other end of the locking rod is used for being supported on the target structure in a jacking mode so that the triangular supporting structure supported in the target structure can be kept stable, and dismounting operation on a reinforcing hoop of the column reinforcement cage is easy.

Description

Technical Field

[0001] The present invention relates to the field of internal support technology, and in particular to an internal support device and a use method thereof. Background Art

[0002] Steel cage is an indispensable steel structure in construction projects such as cylindrical piers and pile foundations. It plays a role in enhancing structural strength, bearing loads and confining concrete. It is usually composed of main bars, stirrups and other steel bars to form a cylindrical cage structure. In the production process of steel cage, lifting and handling are inevitable processes. For longer and larger diameter steel cages, their own weight is large and it is easy to cause the cage body to deform, especially the radial deformation at the lifting point, which has a greater impact on subsequent construction and use.

[0003] The existing solution is to install a triangular support structure on the reinforcement hoop of the column reinforcement cage used in cylindrical piers and pile foundations to support the cage body. It is installed before lifting and transportation, and disassembled when finally hoisted and lowered, so that the designed shape of the reinforcement cage can be maintained. However, in order to obtain stable supporting capacity, the three supporting points of the triangular support structure need to be relatively evenly distributed in the circumference of the reinforcement hoop, which makes the triangular support structure larger in size and more difficult to put in and take out the reinforcement cage as a whole. Therefore, most of the existing triangular support structures are designed as split structures, which are detachably assembled from three retractable rods. They are fed into the reinforcement cage one by one and assembled and tightened. When disassembling, they are also adjusted to loosen the tightening and then taken out one by one, which is very cumbersome. Summary of the invention

[0004] The problem solved by the invention is to design an inner support structure which is easy to assemble and disassemble on a reinforcing hoop of a column reinforcement cage.

[0005] In order to solve the above problems, the present invention provides an inner support device and a method for using the same.

[0006] In the first aspect, the present invention provides an internal support device, including three foot supports, four support rods and a locking rod; the three foot supports and one end of the locking rod are connected in sequence through the four support rods to form a closed structure; the rod end of each support rod is rotatably set on the corresponding foot support or the locking rod; when the two support rods connected to one end of the locking rod are collinear, the internal support device forms a triangular support structure with the three foot supports as support points, and the triangular support structure is used to be supported in a target structure; the locking rod is a telescopic rod, and the other end of the locking rod is used to support the target structure so that the triangular support structure supported in the target structure remains stable.

[0007] Furthermore, a limiting structure is provided on the locking rod, and the limiting structure is used to limit the co-linear support rods from rotating around a corresponding rotation axis on the locking rod toward a direction close to the other end of the locking rod.

[0008] The rotation range of the two support rods on the locking rod is limited by the limiting structure, so that when the locking rod supports the ends of the two support rods, the two support rods can be kept in a co-linear state.

[0009] Furthermore, the limiting structure includes a first U-shaped structure, a first rotating shaft is arranged between two opposite side plates of the first U-shaped structure, and the first rotating shaft is used to be rotatably connected to the support rod; the outer side surface of the bottom plate of the first U-shaped structure is fixedly connected to one end of the locking rod; the inner side surface of the bottom plate of the first U-shaped structure is used to contact with the support rod to achieve rotation limiting. The limiting structure adopts a contact limiting method to perform rotation limiting, which has a simple structure and is easy to implement.

[0010] Furthermore, the two support rods connected to the locking rod are perpendicular to the locking rod body when in the co-linear state.

[0011] Furthermore, the two support rods connected to the locking rod have the same length, and the two support rods not connected to the locking rod have the same length.

[0012] Furthermore, the support rods are all telescopic rods.

[0013] Furthermore, the foot support includes a second U-shaped structure, and a second rotating shaft is provided between two side plates of the second U-shaped structure, and the second rotating shaft is used for being rotatably connected to the support rod.

[0014] Furthermore, the other ends of the three foot supports and the locking rod are each provided with a U-shaped clip, and the U-shaped clip is used to be clipped onto the target structure.

[0015] Furthermore, the three points on which the foot support is supported on the target structure, and the point on which the locking rod supports the target structure, are sequentially connected to form a quadrilateral that surrounds the center of the target structure.

[0016] In a second aspect, the present invention provides a method for using the above-mentioned internal support device, when the internal support device is installed on the reinforcement hoop of the column reinforcement cage for support, the method comprises the following steps:

[0017] Insert the foot support at the diagonal position of the locking rod into the column reinforcement cage and support it on the reinforcement hoop;

[0018] Move the other end of the locking rod into the column reinforcement cage and support it on the reinforcement hoop;

[0019] The length of the locking rod is adjusted and extended until the two support rods connected to the locking rod are in a co-linear state, and the three foot supports form a triangular support structure in the reinforcing hoop.

[0020] Furthermore, before the foot support at the diagonal position of the locking rod is inserted into the column reinforcement cage and supported on the reinforcement hoop, it also includes: adjusting the size of the four support rods according to the size of the inner reinforcement cage so that the four support rods can form a triangular support structure in the reinforcement hoop.

[0021] Furthermore, the other ends of the three foot supports and the locking rod are clamped in the reinforcing hoop of the column reinforcement cage through U-shaped clips to achieve top support.

[0022] Furthermore, when the inner support device is disassembled from the reinforcement hoop of the column reinforcement cage, the following steps are included:

[0023] Adjust and shorten the length of the locking rod, and make the other end of the locking rod and the two foot supports other than the diagonal position of the locking rod separate from the reinforcing hoop;

[0024] The inner support device is pulled out from the column reinforcement cage.

[0025] Furthermore, the inner support device can be folded and deformed into a straight-line structure, so as to be easily taken out from the gap between the steel bars.

[0026] The beneficial effects of the inner support device and the use method thereof of the present invention are:

[0027] In the above-mentioned internal support device, the target structure is the reinforcement hoop of the column reinforcement cage, and the four support rods constitute a deformable hinge-like four-bar linkage mechanism. When in use, the deformability of this type of hinge-like four-bar linkage mechanism can be utilized to easily achieve disassembly and assembly on the reinforcement hoop of the column reinforcement cage. Specifically: when the inner support device is placed in or taken out of the column reinforcement cage, the hinge-like four-bar linkage can be deformed by adjustment to change the inner support device into a flat shape, and the best shape can be deformed to be close to a straight line, so that it can be easily inserted or withdrawn using the pores of the column reinforcement cage; when the inner support device is removed from the reinforcement hoop, the locking rod can be retracted first to release the lock of the two struts connected to the locking rod from being in a collinear state, thereby releasing the triangular support structure from supporting the reinforcement hoop, and the disassembly is simple; when the inner support device is supported on the reinforcement hoop, the other end of the locking rod and the foot support at the diagonal position thereof are first set on the reinforcement hoop, and then the length of the locking rod is adjusted, and finally the two struts connected to the locking rod are in a collinear state and locked, and at the same time the hinge-like four-bar linkage gradually expands and deforms into a triangular support structure, which is supported in the reinforcement hoop. In short, the inner support device does not require complicated disassembly and assembly when used, and is convenient and quick to use, and can be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the inner support device of the present invention being supported in the reinforcing hoop when in use.

[0029] Figure 2 It is a schematic diagram of the foot support structure of the inner support device of the present invention.

[0030] Figure 3 Schematic diagram of the internal support device of the present invention when inserted into the column reinforcement cage

[0031] Figure 4 Schematic diagram of the internal support device of the present invention when disassembling

[0032] Description of reference numerals:

[0033] 1. Foot support; 11. Second U-shaped structure; 12. Second rotating shaft; 13. U-shaped card; 2. Support rod; 3. Lock rod; 31. First U-shaped structure; 32. First rotating shaft; 4. Target structure; 5. Wire rope with buckle. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0035] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0036] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0037] like Figure 1-4As shown, an internal support device provided by an embodiment of the present invention includes three leg supports 1, four support rods 2 and a locking rod 3; the three leg supports 1 and one end of the locking rod 3 are connected in sequence through four support rods 2 to form a closed structure; the rod end of each support rod 2 is rotatably set on the corresponding leg support 1 or the locking rod 3; when the two support rods 2 connected to one end of the locking rod 3 are colinear, the internal support device forms a triangular support structure with the three leg supports 1 as support points, and the triangular support structure is used to support in a target structure 4; the locking rod 3 is a retractable rod; the other end of the locking rod 3 is used to support on the target structure 4, so that the triangular support structure supported in the target structure 4 remains stable.

[0038] In this embodiment, four support rods 2 are connected end to end in sequence to form four connection points, wherein the support rods 2 at three connection points are rotationally connected through the corresponding three foot supports 1, and the support rod 2 at another connection point is rotationally connected through the locking rod 3.

[0039] In the above-mentioned internal support device, the four support rods 2 form a deformable hinge-like four-bar linkage, the target structure 4 can be the reinforcing hoop of the column reinforcement cage mentioned in the background technology, or a hollow circular cross-section structure or a tubular structure, and the triangular support structure can be supported on a circumference of the target structure 4 to prevent the target structure 4 from deforming inward. For the convenience of description, the reinforcement cage used in the cylindrical pier and pile foundation is called the column reinforcement cage.

[0040] When using, Figure 1 As shown, this type of hinged four-bar linkage is deformed into a triangular support structure, and the length of the lock rod 3 is adjusted to make it support the target structure 4, so that the triangular support structure can be supported and maintained stable without deformation, thereby providing support for the target structure 4. When used in the reinforcement hoop, it can prevent the column reinforcement cage from deforming during lifting. When it needs to be removed, it only needs to adjust the length of the lock rod 3 to shorten it and remove the support force of the lock rod 3, so that this type of hinged four-bar linkage can be restored to a deformable state. Figure 4 As shown, it is easy to disassemble, and the entire inner support device can be deformed into a flat structure. When the angle between the two support rods 2 on the locking rod 3 is very small, it can be almost deformed into a straight line, such as Figure 3 As shown, it can be easily taken out of the column reinforcement cage, and vice versa, it is also relatively easy to deform into a nearly straight shape and put into the column reinforcement cage. In short, by utilizing the deformability of this type of hinge four-bar linkage mechanism, the internal support device of the present invention can be easily assembled and disassembled on the reinforcement hoop of the column reinforcement cage, thereby strengthening the strength of the column reinforcement cage.

[0041] Furthermore, a limiting structure is provided on the locking rod 3 , and the limiting structure is used to limit the co-linear support rods 2 from rotating around the corresponding rotation axis on the locking rod 3 in a direction close to the other end of the locking rod 3 .

[0042] The function of the limiting structure is to limit the rotation range of the two support rods 2 connected to the locking rod 3, so that the limit of the reverse rotation of the two support rods 2 around the corresponding rotating shaft on the locking rod 3 is in a collinear state. In this way, when the locking rod 3 supports the ends of the two support rods 2, the two support rods 2 remain in a collinear state, that is, the collinear state is locked, thereby maintaining the stability of the triangular support structure supported in the target structure 4.

[0043] Furthermore, the limiting structure includes a first U-shaped structure 31, and a first rotating shaft 32 is arranged between the opposite side plates of the first U-shaped structure 31, and the first rotating shaft 32 is used to be rotatably connected to the support rod 2; the outer side surface of the bottom plate of the first U-shaped structure 31 is fixedly connected to one end of the locking rod 3; the inner side surface of the bottom plate of the first U-shaped structure 31 is used to contact with the support rod 2 to achieve rotational limiting.

[0044] There are many specific implementation methods of the limit structure, such as Figure 1 As shown, a contact-type limiting structure is provided, namely, a first U-shaped structure 31, which is surrounded by two opposite side plates and a bottom plate to form a U-shaped groove, and the contact blocking of the bottom surface of the groove is used to limit the rotation of the corresponding support rod 2. This structure is simple and easy to implement. Of course, there are other structural forms, which are not limited, such as setting a Y-shaped branch rod at one end of the lock rod 3 to limit the rotation of the support rod 2, setting a stopper on the first rotating shaft 32, etc.

[0045] Specifically, there are two first rotating shafts 32, which are arranged in the middle of the groove body at intervals along the extension direction of the groove body. The first rotating shafts 32 are arranged in a direction perpendicular to the side wall of the first U-shaped structure 31. A support rod 2 is rotatably arranged on each first rotating shaft 32; the rod ends of the two support rods 2 are in contact with the bottom surface of the groove to achieve position limiting. The first U-shaped structure 31 can be a straight groove, and the groove width is greater than the rod diameter of the support rod 2. In addition, when the bottom surface of the groove of the first U-shaped structure 31 is colinear with the two support rods 2, the rod body is parallel, so that when the length of the locking rod 3 is adjusted, the two support rods 2 change symmetrically, and the deformation is uniform and easy to control.

[0046] Furthermore, the two support rods 2 connected to the locking rod 3 are perpendicular to the rod body of the locking rod 3 when they are in a co-linear state.

[0047] like Figure 1 As shown, when in use, the locking rod 3 is perpendicular to the rod bodies of the two collinear support rods 2, and the supporting force of the locking rod 3 will evenly act on the two support rods 2 and the entire triangular support structure, so that the overall force is reasonable and the support is more stable.

[0048] Furthermore, the two support rods 2 connected to the locking rod 3 have the same length, and the two support rods 2 not connected to the locking rod 3 have the same length.

[0049] In this way, the triangular support structure is symmetrical, and the triangular support structure can be adjusted symmetrically by adjusting the length of the strut 2. The adjustment deformation is convenient and easy to control, and the overall force is reasonable. In the best case, the three sides of the triangular support structure have the same length, that is, the lengths of the two struts 2 not connected to the locking rod 3 are the same and equal to twice the length of the collinear struts 2 (that is, each strut 2 connected to the locking rod 3).

[0050] Furthermore, the four support rods 2 are all telescopic rods.

[0051] By adjusting the lengths of the four support rods 2 and the length of the locking rod 3, the size of the triangular support structure can be adjusted as a whole, and it is suitable for target structures 4 of different sizes, and has high flexibility and versatility.

[0052] Specifically, the telescopic rod bodies of the support rod 2 and the locking rod 3 can be composed of an intermediate rod and two end sleeves. Both ends of the intermediate rod are provided with external threads, which can be threadedly connected to an end sleeve respectively. By rotating the intermediate rod, the threaded engagement portion is increased or shortened, so that the overall length of the rod body changes, thereby achieving adjustment.

[0053] In addition, the support of the locking rod 3 is adjusted by twisting the center rod, which is lengthened when locked and shortened when unlocked. When lengthened, the triangular support structure support column steel cage is tightened, and when shortened, the internal support device becomes a deformable structure, which can be easily pulled out to achieve detachable recycling.

[0054] Furthermore, the foot support 1 includes a second U-shaped structure 11 , and a second rotating shaft 12 is provided between two side plates of the second U-shaped structure 11 . The second rotating shaft 12 is used for being rotatably connected to the support rod 2 .

[0055] like Figure 2 As shown, the main structure of the foot support 1 is also a U-shaped structure, namely, the second U-shaped structure 11, which is surrounded by two opposite side plates and a bottom plate to form a U-shaped groove, which is convenient for rotating and connecting the ends of the two support rods 2. The main body of the foot support 1 is composed of the second U-shaped structure 11, and there are two second rotating shafts 12, which extend in a direction perpendicular to the two side walls of the second U-shaped structure 11. The two second rotating shafts 12 are arranged at intervals along the extension direction of the groove body surrounded by the second U-shaped structure 11, so that the rod ends of the two support rods 2 rotate on the foot support 1 without affecting each other, and the outer side surface of the bottom plate of the second U-shaped structure 11 forms a large space for arranging support points for supporting the target structure 4, and the structural design is reasonable.

[0056] In addition, the groove bottom surface of the second U-shaped structure 11 can limit the rotation of the support rod 2 connected to the second rotating shaft 12 like the first U-shaped structure 31, or it can not limit the rotation and impose no restriction.

[0057] Specifically, a U-shaped clip 13 is provided on the outer side surface of the groove bottom plate of the second U-shaped structure 11, and the U-shaped clip 13 is used to form a supporting point and a tightening point of the inner triangle supporting structure.

[0058] Furthermore, the other ends of the three foot supports 1 and the locking rod 3 are each provided with a U-shaped clip 13 , and the U-shaped clip 13 is used to be clipped onto the target structure 4 .

[0059] The three foot supports 1 and the other end of the locking rod 3 can be conveniently set on the target structure 4 through the U-shaped clamp 13, for example, the clamp is sleeved on the reinforcement hoop of the column reinforcement cage, and then tightened.

[0060] Further, such as Figure 1 As shown, it also includes a buckled steel wire rope 5, one end of which is fixed to the rod body of the locking rod 3, and the lock buckle at the other end is used to buckle on the column reinforcement cage to prevent it from loosening during disassembly.

[0061] Furthermore, the three points where the foot support 1 supports the target structure 4, and the point where the locking rod 3 supports the target structure 4, are sequentially connected to form a quadrilateral that surrounds the center of the target structure 4, thereby ensuring the stability of the entire inner support structure during use.

[0062] An embodiment of the present invention provides a method for using the above-mentioned internal support device, and when the internal support device is installed on the reinforcement hoop of the column reinforcement cage for support, it includes the following steps S10-S30.

[0063] Step S10: insert the foot support 1 at the diagonal position of the locking rod 3 (i.e. the foot support 1 arranged diagonally to the locking rod 3) into the column reinforcement cage and support it on the reinforcement hoop.

[0064] Since the column reinforcement cage is made of multiple steel bars, the gaps between the steel bars generally cannot allow the inner support device to be directly placed in with a larger width. Therefore, it is necessary to deform the inner support device by adjusting the relative positions of the four support rods 2 to insert the foot support 1 at the diagonal position of the locking rod 3 into the column reinforcement cage. The best state of adjusting the deformation is as follows: Figure 3 As shown, the deformation is approximately linear, the width is minimal, and the passability when inserted into the column reinforcement cage is optimal.

[0065] Step S20: Move the other end of the locking rod 3 into the column reinforcement cage and support it on the reinforcement hoop. During the movement, the entire inner support device will be continuously deformed, mainly because the relative positions of the four support rods 2 are constantly changing, that is, the quadrilateral formed is constantly deformed, so that the foot support 1 at the diagonal position of the locking rod 3 is inserted into the shape as shown in the figure. Figure 3 As shown, the inner part of the column reinforcement cage is gradually expanded as shown in FIG. Figure 4 shown.

[0066] Finally, by adjusting and shortening the length of the locking rod 3, it is possible to support the locking rod 3 and the foot support 1 at the diagonal portion of the locking rod 3 on the reinforcing hoop. However, at this time, the two support rods 2 connected to the locking rod 3 have not reached a colinear state, and the other two foot supports 1 and the other end of the locking rod 3 are at a certain distance from the target structure 4 and are not supported on the reinforcing hoop.

[0067] Step S30: Adjust the length of the extended locking rod 3 until the two support rods 2 connected to the locking rod 3 are in a collinear state, and the three foot supports 1 form a triangular support structure in the target structure 4, such as Figure 1 shown.

[0068] Furthermore, before step S10, the method further includes: adjusting the size of the four support rods 2 according to the size of the inner reinforcement cage, so that the four support rods 2 can form a triangular support structure in the reinforcement hoop.

[0069] Furthermore, after step S30, the method further includes: using the lock buckle of the buckled steel wire rope 5 to buckle onto the column reinforcement cage, and of course, it can also be directly buckled onto the reinforcement hoop.

[0070] Furthermore, when the inner support device is disassembled from the reinforcement hoop of the column reinforcement cage, the following steps A10-A20 are included.

[0071] Step A10: Adjust and shorten the length of the locking rod 3, and make the other end of the locking rod 3 and the two leg supports 1 other than the diagonal position of the locking rod 3 (the two leg supports 1 adjacent to the locking rod 3) separate from the reinforcing hoop. Figure 4 As shown, by adjusting and shortening the length of the locking rod 3, the locking of the colinear state of the two support rods 2 connected to the locking rod 3 can be released, thereby releasing the triangular support structure from supporting the target structure 4. Then, by adjusting the relative positions of the four support rods 2, the other end of the locking rod 3 and the two foot supports 1 other than the diagonal position of the locking rod 3 can be easily detached from the reinforcing hoop.

[0072] In addition, the general disassembly steps are performed when the steel cage is suspended in the pile hole. In order to prevent the inner support device from falling down during the process of adjusting and shortening the length of the lock rod 3 and releasing the support, when the length of the lock rod 3 is manually shortened, the foot support 1 at the diagonal of the lock rod 3 can be manually supported on the reinforcing hoop. However, when the foot support 1 is provided with a U-shaped clip 13, by keeping the U-shaped clip 13 on the foot support 1 at the diagonal of the lock rod 3 stuck on the reinforcing hoop, there is no need to manually apply the support force to prevent falling down.

[0073] Step A20: Pull out the inner support device from the column reinforcement cage.

[0074] Specifically, the inner support device is deformed by adjusting the relative positions of the four support rods 2 so as to gradually withdraw the inner support device from the column reinforcement cage. The specific operation is opposite to the insertion process of the above steps S10 and S20. The inner support device is gradually deformed by manual control. Figure 4 Gradually transformed into Figure 3 state, and gradually move it out of the column reinforcement cage.

[0075] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An internal support device, characterized in that: It comprises three foot supports (1), four support rods (2) and a locking rod (3); The three foot supports (1) and one end of the locking rod (3) are connected in sequence through the four support rods (2) to form a closed structure; the rod end of each support rod (2) is rotatably arranged on the corresponding foot support (1) or the locking rod (3); When the two support rods (2) connected to one end of the locking rod (3) are in a colinear relationship, the inner support device forms a triangular support structure with the three foot supports (1) as support points, and the triangular support structure is used to support a target structure (4) having a hollow circle in cross section; The locking rod (3) is a telescopic rod; the other end of the locking rod (3) is used to support the target structure (4) so ​​that the triangular support structure supported in the target structure (4) remains stable.

2. The inner support device according to claim 1, characterized in that: The locking rod (3) is provided with a limiting structure, and the limiting structure is used to limit the co-linear support rod (2) from rotating around a corresponding rotation axis on the locking rod (3) in a direction close to the other end of the locking rod (3).

3. The inner support device according to claim 2, characterized in that: The limiting structure comprises a first U-shaped structure (31), a first rotating shaft (32) is arranged between two opposite side plates of the first U-shaped structure (31), and the first rotating shaft (32) is used to be rotatably connected to the support rod (2); the outer side surface of the bottom plate of the first U-shaped structure (31) is fixedly connected to one end of the locking rod (3); and the inner side surface of the bottom plate of the first U-shaped structure (31) is used to contact with the support rod (2) to achieve rotation limiting.

4. The inner support device according to claim 1, characterized in that: When the two support rods (2) connected to the locking rod (3) are in the co-linear state, they are perpendicular to the rod body of the locking rod (3).

5. The inner support device according to claim 1, characterized in that: The two support rods (2) connected to the locking rod (3) have the same length, and the two support rods (2) not connected to the locking rod (3) have the same length.

6. The inner support device according to claim 1, characterized in that: The four support rods (2) are all telescopic rods.

7. The inner support device according to claim 1, characterized in that: The foot support (1) comprises a second U-shaped structure (11), a second rotating shaft (12) is arranged between two side plates of the second U-shaped structure (11), and the second rotating shaft (12) is used for being rotatably connected to the support rod (2).

8. The inner support device according to claim 1, characterized in that: A U-shaped clip (13) is provided on each of the three foot supports (1) and the other end of the locking rod (3), and the U-shaped clip (13) is used for being clamped onto the target structure (4).

9. The inner support device according to claim 1, characterized in that: The three points on which the foot support (1) supports the target structure (4) and the point on which the locking rod (3) supports the target structure (4) are connected in sequence to form a quadrilateral that surrounds the center of the target structure (4).

10. A method for using the inner support device according to any one of claims 1 to 9, characterized in that: When the inner support device is installed on the reinforcement hoop of the column reinforcement cage for support, the following steps are included: Insert the foot support (1) at the diagonal position of the locking rod (3) into the column reinforcement cage and support it on the reinforcement hoop; Move the other end of the locking rod (3) into the column reinforcement cage and support it on the reinforcement hoop; The length of the locking rod (3) is adjusted and extended until the two support rods (2) connected to the locking rod (3) are in a co-linear state, and the three foot supports (1) form a triangular support structure in the reinforcing hoop.

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