Foundation pit supporting structure

Abstract

The invention relates to a foundation pit supporting structure which comprises a bottom plate, a plurality of first inserting rods are inserted into the bottom plate, the tops of the first inserting rods extend out of the bottom plate and are fixedly provided with first supporting plates, the left side and the right side of each first supporting plate are fixedly provided with second blocking pieces, the second blocking pieces are attached to the bottom of the bottom plate, and a fixing plate is fixedly installed at the top of the bottom plate. The front side of the fixing plate is slidably connected with a second check block through a second spring, and the second check block and the rear side of the first supporting plate extrude each other. A side plate is attached to the top of the left side of the bottom plate, a plurality of second insertion rods are inserted into the side plate, and the right sides of the second insertion rods extend out of the side plate and are fixedly provided with second supporting plates. By arranging and adjusting the first supporting plate, the second supporting plate and structures matched with the first supporting plate and the second supporting plate, bolts can be replaced to fix the bottom plate and the side plates in the foundation pit, the installation speed is increased, the reinforcing component is arranged, the bottom plate and the side plates can be reinforced, and therefore the foundation pit structure stability is improved, and the installation cost is reduced. And the collapse risk is reduced.

Description

Technical Field

[0001] This application relates to the technical field of foundation pit support and protection, and in particular to a foundation pit support structure. Background Technology

[0002] A foundation pit is an earthen pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. It is classified into foundation trenches (the length is 3 times or more of the width and the width is no more than 3m), foundation pits (the bottom area is less than 20㎡), and large-scale excavation foundation pits (excavating the entire foundation of a building). When the depth of the foundation pit reaches or exceeds 5 meters, it is called a deep foundation pit. Foundation pits are widely used in high-rise building foundations, open-cut construction of urban subway stations and tunnels, river-crossing tunnels, combined sewage treatment systems, pedestrian underpasses, and underground interchanges.

[0003] Foundation pit construction is a crucial part of building engineering, involving a complex process from excavation to structural completion. During foundation pit construction, in order to reduce the possibility of deformation or collapse, it is necessary to support and protect it. Existing foundation pit support structures require the use of multiple sets of bolts to constrain them during installation. However, the operation of rotating multiple sets of bolts is relatively complicated and requires the use of other tools to rotate the bolts. After long-term use, the bolts may also become unstable, thereby increasing the risk of collapse. Therefore, it is necessary to propose a foundation pit support structure to solve the above problems. Summary of the Invention

[0004] To address the problems of existing foundation pit support structures, which involve complex operations involving rotating multiple sets of bolts and require additional tools, and which may lead to insufficient stability of the bolts after prolonged use, thereby increasing the risk of collapse, this application provides a foundation pit support structure.

[0005] This application provides a foundation pit support structure, which adopts the following technical solution: A foundation pit support structure includes a base plate, with several insert rods inserted inside the base plate. The top of each insert rod extends out of the base plate and is fixedly mounted on a support plate. Baffles are fixedly mounted on both the left and right sides of the support plate, fitting snugly against the bottom of the base plate. A fixing plate is fixedly mounted on the top of the base plate, with a stop block slidably connected to the front side of the fixing plate via a spring. The stop block slidably presses against the rear side of the support plate. A side plate is fitted to the top left side of the base plate, with several insert rods inserted inside the side plate. The right side of each insert rod extends out of the side plate and is fixedly mounted on a support plate. Baffles are fixedly mounted on the top and bottom of the support plate, fitting snugly against the left side of the side plate. A connecting plate is fixedly mounted on the right side of the side plate, with a stop block slidably connected to the front side of the connecting plate via a spring. The stop block slidably presses against the rear side of the support plate. A reinforcing component is provided between the base plate and the side plate for connecting and reinforcing the base plate and the side plate.

[0006] By rotating baffle two and locking it at the bottom of the base plate, rotating baffle one and locking it at the left side of the side plate, and using the elastic force of spring two to press baffle two to limit the position of support plate one, and using the elastic force of spring one to press baffle one to limit the position of support plate two, the base plate and side plate can be installed and fixed in place of bolts without having to rotate bolts multiple times to install the base plate, thus speeding up the installation process and fixing the base plate and side plate in the pit, thereby improving work efficiency.

[0007] A further improvement of the technical solution of the present invention is that: the reinforcing component includes a diagonal rod 1, a slider 1 fixedly installed at the bottom of the diagonal rod 1, the slider 1 being slidably connected to the interior of the base plate, a fixing member fixedly installed at the top of the base plate on the inner side of the support plate 1, a locking block 1 slidably installed inside the fixing member via a spring 3, the left side of the locking block 1 extending out of the interior of the fixing member and fitting into the interior of the diagonal rod 1; a slider 2 fixedly installed on the left side of the diagonal rod 1, the slider 2 being slidably connected to the interior of the side plate, a connecting member fixedly installed on the right side of the side plate between the support plates 2, a locking block 2 slidably installed inside the connecting member via a spring 4, the bottom of the locking block 2 extending out of the interior of the connecting member and fitting into the interior of the diagonal rod 1.

[0008] By adopting the above technical solution, the reinforcement components cooperate with each other. After the diagonal rod 1 is moved between the fixing part and the connecting part, the elastic force of the spring 3 can be used to push the locking block 1 into the interior of the diagonal rod 1, and the elastic force of the spring 4 can be used to push the locking block 2 into the interior of the diagonal rod 1, thereby connecting and fixing the diagonal rod 1 with the base plate and the side plate to form triangular stability, thus achieving the reinforcement effect.

[0009] A further improvement of the technical solution of the present invention is that: a second diagonal rod is fixedly installed on the left side of the first diagonal rod, and the bottom and left side surface of the second diagonal rod are respectively attached to the surface of the bottom plate and the side plate.

[0010] By adopting the above technical solution, the contact area between the first diagonal brace and the bottom plate and side plate can be increased by setting the second diagonal brace, which further improves the reinforcement effect.

[0011] A further improvement of the technical solution of the present invention is that: a slider three is fixedly installed at the bottom of the diagonal rod two, and the slider three is slidably connected to the inside of the base plate; a slider four is fixedly installed on the left side of the diagonal rod two, and the slider four is slidably connected to the inside of the side plate.

[0012] By adopting the above technical solution, and by setting slider three and slider four, the contact area between the inclined rod two and the bottom plate and the side plate can be increased, thereby reducing the possibility of the inclined rod two separating from the bottom plate and the side plate, further improving the reinforcement effect of the bottom plate and the side plate, improving the stability of the foundation pit structure, and thus reducing the risk of collapse.

[0013] A further improvement of the technical solution of the present invention is that: a barb two is slidably installed inside the insert rod one at the bottom of the baffle two through a spring seven, and an inclined surface that slopes outward toward the top is opened on the inner surface of the barb two. A movable rod is inserted into the insert rod one and the support plate one, and the bottom of the movable rod is in contact with the inclined surface of the barb two.

[0014] By adopting the above technical solution, the movable rod and the second barb cooperate with each other. Specifically, by making the movable rod fit against the inclined surface of the second barb, the movable rod presses the second barb downward, which pushes the second barb out of the interior of the first insert rod and inserts it into the soil. This increases the contact area between the first insert rod and the soil, reduces the possibility of the first insert rod separating from the soil, and improves the stability of the base plate installation.

[0015] A further improvement of the technical solution of the present invention is that: a limiting frame is fixedly installed on the top of the support plate one, and a limiting rod two is slidably installed inside the limiting frame through a spring eight. The left side of the limiting rod two extends out of the interior of the limiting frame, and the top of the movable rod extends out of the top of the support plate one, and the left side of the limiting rod two and the movable rod are pressed against each other.

[0016] In the above technical solution, after the movable rod moves downward, the elastic force of spring eight can drive the limiting rod two to the top of the movable rod, thereby preventing the movable rod from moving upward and improving the stability of the position of the barb two.

[0017] A further improvement of the technical solution of the present invention is that: a barb is slidably installed inside the insert rod 2 on the left side of the baffle 1 by a spring 5, and the inner surface of the barb 1 is provided with an inclined surface that slopes outward toward the bottom. A connecting rod is inserted into the insert rod 2 and the support plate 2, and the bottom of the connecting rod is in contact with the inclined surface of the barb 1.

[0018] By adopting the above technical solution, the connecting rod and the first barb cooperate with each other. Specifically, by fitting the connecting rod against the inclined surface of the first barb, the connecting rod presses the first barb to the left, which pushes the first barb out of the interior of the second insert rod and inserts it into the soil. This increases the contact area between the second insert rod and the soil, reduces the possibility of the second insert rod separating from the soil, and improves the stability of the side plate installation.

[0019] A further improvement of the technical solution of the present invention is that: a fixed frame is fixedly installed on the right side of the support plate 2, and a limiting rod 1 is slidably installed inside the fixed frame through a spring 6. The bottom of the limiting rod 1 extends out of the interior of the fixed frame, and the right side of the connecting rod extends out of the interior of the support plate 2. The bottom of the limiting rod 1 and the connecting rod are pressed against each other.

[0020] In the above technical solution, after the connecting rod moves to the left, the elastic force of spring six can drive the limiting rod one to the right side of the connecting rod, thereby preventing the connecting rod from moving to the right and improving the stability of the position of the barb one.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention provides a fully automatic multi-axis winding machine. By setting up a support plate 1 and a support plate 2 and other structures to cooperate with each other, wherein by rotating and locking the baffle plate 2 at the bottom of the base plate, rotating and locking the baffle plate 1 at the left side of the side plate, and using spring 2 to press the stop block 2 to limit the support plate 1, and using spring 1 to press the stop block 1 to limit the support plate 2, the base plate and the side plate can be installed and fixed in place of bolts, thereby fixing the base plate and the side plate in the foundation pit, speeding up the installation and improving work efficiency.

[0022] 2. This invention provides a fully automatic multi-axis winding machine. By setting up a reinforcing component, the inclined rod 1 is moved between the fixing component and the connecting component. At the same time, the clamping block 1 is pushed into the interior of the inclined rod 1 by the spring 3, and the clamping block 2 is pushed into the interior of the rod 1 by the spring 4. The addition of the inclined rod 2 increases the contact area between the inclined rod 1 and the bottom plate and the side plate, forming a triangular stable support, thereby achieving a reinforcing effect, improving the stability of the foundation pit structure, and reducing the risk of collapse.

[0023] 3. This invention provides a fully automatic multi-axis winding machine. By setting a movable rod and barbs two, as well as a connecting rod and barbs one, the movable rod can push the barbs two out of the interior of the insert rod one and insert them into the soil by pressing the barbs two downward. By pressing the connecting rod to the left, the barbs one can be pushed out of the interior of the insert rod two and insert them into the soil. This reduces the possibility of the insert rods one and two separating from the soil, thereby improving the stability of the installation of the base plate and side plate and further reducing the risk of collapse. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention; Figure 2 This is a partial structural diagram of the side plate cross-section of the present invention; Figure 3 This is a partial structural diagram of the base plate of the present invention; Figure 4 This is a partial structural diagram of the support plate in two cross sections of the present invention; Figure 5 This is a partial cross-sectional structural diagram of the support plate of the present invention; Figure 6 This is a partial structural diagram of the diagonal bar of the present invention; Figure 7 This is a schematic diagram of a partially exploded structure of the inclined rod of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Side plate; 3. Support plate one; 4. Insert rod one; 5. Fixing plate; 6. Movable rod; 7. Limiting frame; 8. Support plate two; 9. Connecting plate; 10. Connecting rod; 11. Fixing frame; 12. Insert rod two; 13. Baffle one; 14. Diagonal rod one; 15. Fixing component; 16. Connecting component; 17. Diagonal rod two; 18. Spring one; 19. Stop block one; 20. Baffle two; 21. Spring two; 22. Stop block two; 23. Locking block one; 24. Spring three; 25. Locking block two; 26. Spring four; 27. Slider one; 28. Slider two; 29. ​​Slider three; 30. Slider four; 31. Barb one; 32. Spring five; 33. Limiting rod one; 34. Spring six; 35. Barb two; 36. Spring seven; 37. Limiting rod two; 38. Spring eight. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0027] Example 1 See Figure 1 , Figure 2 and Figure 3This invention provides a foundation pit support structure, including a base plate 1. Several insert rods 4 are inserted into the interior of the base plate 1. The tops of the insert rods 4 extend out of the interior of the base plate 1 and are fixedly mounted on a support plate 3. Baffle plates 20 are fixedly mounted on both the left and right sides of the support plate 3, and the baffle plates 20 are in contact with the bottom of the base plate 1. A fixing plate 5 is fixedly mounted on the top of the base plate 1. A stop block 22 is slidably connected to the front side of the fixing plate 5 via a spring 21. The stop block 22 presses against the rear side of the support plate 3. A side plate 2 is attached to the top left side of the base plate 1. Several insert rods 12 are inserted into the interior of the plate 2. The right side of the insert rods 12 extends out of the interior of the side plate 2 and is fixedly installed with a support plate 8. The top and bottom of the support plate 8 are fixedly installed with baffles 13. The baffles 13 fit against the left side of the side plate 2. The right side of the side plate 2 is fixedly installed with a connecting plate 9. The front side of the connecting plate 9 is slidably connected to a stop block 19 by a spring 18. The stop block 19 presses against the rear side of the support plate 8. A reinforcing component is provided between the bottom plate 1 and the side plate 2. The reinforcing component is used to connect and reinforce the bottom plate 1 and the side plate 2.

[0028] In this embodiment, by rotating and locking the second baffle plate 20 at the bottom of the base plate 1, rotating and locking the first baffle plate 13 at the left side of the side plate 2, and using the elastic force of the second spring 21 to press the second baffle block 22 to limit the first support plate 3, and using the elastic force of the first spring 18 to press the first baffle block 19 to limit the second support plate 8, the base plate 1 and the side plate 2 can be installed and fixed instead of bolts. This eliminates the need to rotate the bolts multiple times to install the base plate 1, speeds up the installation process, and thus fixes the base plate 1 and the side plate 2 in the pit, improving work efficiency.

[0029] Example 2 See Figure 1 , Figure 6 and Figure 7Based on Embodiment 1, the present invention provides a technical solution: Preferably, the reinforcing component includes a diagonal rod 14, a slider 27 fixedly installed at the bottom of the diagonal rod 14, the slider 27 being slidably connected to the interior of the base plate 1, a fixing member 15 fixedly installed at the top of the base plate 1 on the inner side of the support plate 3, a locking block 23 slidably installed inside the fixing member 15 via a spring 3 24, the left side of the locking block 23 extending out of the interior of the fixing member 15 and fitting into the interior of the diagonal rod 14; a slider 28 fixedly installed on the left side of the diagonal rod 14, the slider 28 being slidably connected to the interior of the side plate 2, and the support plate 28 being... A connector 16 is fixedly installed on the right side of the side plate 2. A locking block 25 is slidably installed inside the connector 16 via a spring 4 26. The bottom of the locking block 25 extends out of the interior of the connector 16 and fits into the interior of the inclined rod 14. An inclined rod 27 is fixedly installed on the left side of the inclined rod 14. The bottom and left surface of the inclined rod 27 are respectively in contact with the surfaces of the base plate 1 and the side plate 2. A slider 39 is fixedly installed at the bottom of the inclined rod 27. The slider 39 is slidably connected to the interior of the base plate 1. A slider 40 is fixedly installed on the left side of the inclined rod 27. The slider 40 is slidably connected to the interior of the side plate 2.

[0030] In this embodiment, through the cooperation between the reinforcing components, after the inclined rod 14 is moved between the fixing member 15 and the connecting member 16, the elastic force of the spring 3 24 can push the locking block 23 into the interior of the inclined rod 14, and the elastic force of the spring 4 26 can push the locking block 25 into the interior of the inclined rod 14, thus connecting and fixing the inclined rod 14 with the bottom plate 1 and the side plate 2, forming a triangular stability, thereby achieving the reinforcement effect. By setting the inclined rod 2 17, the contact area between the inclined rod 14 and the bottom plate 1 and the side plate 2 can be increased, further improving the reinforcement effect. Furthermore, by setting the slider 3 29 and the slider 4 30, the contact area between the inclined rod 2 17 and the bottom plate 1 and the side plate 2 can be increased, thereby reducing the possibility of the inclined rod 2 17 detaching from the bottom plate 1 and the side plate 2, further improving the reinforcement effect of the bottom plate 1 and the side plate 2, improving the stability of the foundation pit structure, and thus reducing the risk of collapse.

[0031] Example 3 See Figure 2 , Figure 3 , Figure 4 and Figure 5Based on Embodiment 2, the present invention provides a technical solution: Preferably, a barb 35 is slidably installed inside the insert rod 4 at the bottom of the baffle 20 via a spring 7 36. The inner surface of the barb 35 has an inclined surface that slopes outward towards the top. A movable rod 6 is inserted into the insert rod 4 and the support plate 3. The bottom of the movable rod 6 is in contact with the inclined surface of the barb 35. A limit frame 7 is fixedly installed on the top of the support plate 3. A limit rod 37 is slidably installed inside the limit frame 7 via a spring 8 38. The left side of the limit rod 37 extends out of the interior of the limit frame 7, and the top of the movable rod 6 extends out of the top of the support plate 3. The left side of the limit rod 37 is in contact with the inside of the support plate 7. The movable rods 6 press against each other. Inside the insert rod 2 12 on the left side of the baffle 1 13, a barb 31 is slidably installed via spring 5 32. The inner surface of the barb 31 has an inclined surface that slopes outward towards the bottom. A connecting rod 10 is inserted into the insert rod 2 12 and the support plate 2 8. The bottom of the connecting rod 10 is in contact with the inclined surface of the barb 31. A fixing frame 11 is fixedly installed on the right side of the support plate 2 8. Inside the fixing frame 11, a limiting rod 33 is slidably installed via spring 6 34. The bottom of the limiting rod 33 extends out of the interior of the fixing frame 11. The right side of the connecting rod 10 extends out of the interior of the support plate 2 8, and the bottom of the limiting rod 33 presses against the connecting rod 10.

[0032] In this embodiment, through the cooperation between the movable rod 6 and the second barb 35, the movable rod 6 and the inclined surface of the second barb 35 are brought into contact. The movable rod 6 presses the second barb 35 downward, which pushes the second barb 35 out of the insertion rod 4 and inserts it into the soil. This increases the contact area between the insertion rod 4 and the soil, reduces the possibility of the insertion rod 4 separating from the soil, and improves the stability of the base plate 1 installation. Furthermore, after the movable rod 6 moves downward, the elastic force of the spring 8 38 can drive the second limiting rod 37 to the top of the movable rod 6, thereby preventing the movable rod 6 from moving upward and improving the stability of the position of the second barb 35. Through the cooperation between the connecting rod 10 and the barb 31, the connecting rod 10 is pressed against the inclined surface of the barb 31, and the connecting rod 10 presses the barb 31 to the left, thus pushing the barb 31 out of the insertion rod 12 and inserting it into the soil. This increases the contact area between the insertion rod 12 and the soil, reduces the possibility of the insertion rod 12 separating from the soil, and improves the stability of the side plate 2 installation. Furthermore, after the connecting rod 10 moves to the left, the elastic force of the spring 6 34 can drive the limiting rod 33 to the right side of the connecting rod 10, thereby preventing the connecting rod 10 from moving to the right and improving the stability of the position of the barb 31.

[0033] The working principle of this fully automatic multi-axis winding machine is explained in detail below.

[0034] like Figures 1-7As shown, the operator places the base plate 1 in the pit, first rotates the support plate 3 horizontally by 90 degrees, inserts the insertion rod 4 and the baffle plate 20 into the base plate 1, then rotates the support plate 3 horizontally by 90 degrees so that the baffle plate 20 engages with the bottom of the base plate 1, thus quickly installing the base plate 1. Next, the operator pulls the limiting rod 2 37 to the right and pushes the movable rod 6 downward, causing the movable rod 6 to press the barb 2 35, pushing the barb 2 35 out of the insertion rod 4 to reinforce the insertion rod 4. Then, the operator rotates the support plate 2 90 degrees vertically, inserts the insertion rod 2 12 and the baffle plate 1 13 into the side plate 2, and then rotates the support plate 2 90 degrees vertically so that the baffle plate 1 13 engages with the side plate 2. To quickly install side plate 2, pull the limiting rod 33 upwards and push the connecting rod 10 to the left, causing the connecting rod 10 to compress spring 32 and push spring 32 out of the insertion rod 12 to reinforce the insertion rod 12. Finally, the operator places side plate 2 in the pit and aligns bottom plate 1 and side plate 2. Slider 27 and slider 39, as well as slider 28 and slider 4 30, are inserted into bottom plate 1 and side plate 2 respectively. Spring 3 24 is used to push block 23 into the interior of inclined rod 14, and spring 4 26 and block 2 25 are used to push into the interior of inclined rod 14, thereby reinforcing bottom plate 1 and side plate 2.

[0035] 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 foundation pit support structure comprising a bottom plate (1), characterized by: The inside of the bottom plate (1) is inserted with a plurality of insertion rods (4), the top of the insertion rod (1) extends out of the inside of the bottom plate (1) and is fixedly installed with a supporting plate (3), the left and right sides of the supporting plate (3) are fixedly installed with a baffle (20), the baffle (20) is attached to the bottom of the bottom plate (1), the top of the bottom plate (1) is fixedly installed with a fixed plate (5), the front side of the fixed plate (5) is slidably connected with a stop block (22) through a spring (21), and the stop block (22) is in mutual extrusion with the rear side of the supporting plate (3). The left top of the bottom plate (1) is attached with a side plate (2), the inside of the side plate (2) is inserted with a plurality of insertion rods (12), the right side of the insertion rod (12) extends out of the inside of the side plate (2) and is fixedly installed with a supporting plate (8), the top and bottom of the supporting plate (8) are fixedly installed with a baffle (13), the baffle (13) is attached to the left side of the side plate (2), and the right side of the side plate (2) is fixedly installed with a connecting plate (9). The front side of the connecting plate (9) is slidably connected with a stop block (19) through a spring (18), and the stop block (19) is in mutual extrusion with the rear side of the supporting plate (8). The reinforcing component is arranged between the bottom plate (1) and the side plate (2), and is used for connecting and reinforcing the bottom plate (1) and the side plate (2).

2. A foundation pit support structure according to claim 1, wherein: The reinforcing component comprises an inclined rod (14), the bottom of the inclined rod (14) is fixedly installed with a sliding block (27), the sliding block (27) is slidably connected with the inside of the bottom plate (1), the top of the bottom plate (1) is fixedly installed with a fixed part (15) on the inner side of the supporting plate (3), the inside of the fixed part (15) is slidably installed with a clamping block (23) through a spring (24), the left side of the clamping block (23) extends out of the inside of the fixed part (15) and is embedded with the inside of the inclined rod (14). The left side of the inclined rod (14) is fixedly installed with a sliding block (28), the sliding block (28) is slidably connected with the inside of the side plate (2), the right side of the side plate (2) between the supporting plates (8) is fixedly installed with a connecting part (16), the inside of the connecting part (16) is slidably installed with a clamping block (25) through a spring (26), and the bottom of the clamping block (25) extends out of the inside of the connecting part (16) and is embedded with the inside of the inclined rod (14).

3. A retaining structure according to claim 2, wherein: The left side of the inclined rod (14) is fixedly installed with an inclined rod (17), and the bottom and left side surface of the inclined rod (17) are attached to the surfaces of the bottom plate (1) and the side plate (2) respectively.

4. A retaining structure according to claim 3, wherein: The bottom of the inclined rod (17) is fixedly installed with a sliding block (29), the sliding block (29) is slidably connected with the inside of the bottom plate (1), and the left side of the inclined rod (17) is fixedly installed with a sliding block (30), the sliding block (30) is slidably connected with the inside of the side plate (2).

5. A retaining structure according to claim 1 wherein: The inside of the inserting rod one (4) of the bottom of the baffle piece two (20) is slidably provided with a barb two (35) through a spring seven (36), the inner side of the barb two (35) is provided with an inclined surface which inclines to the outside of the top, the inside of the inserting rod one (4) and the support plate one (3) is inserted with a movable rod (6), the bottom of the movable rod (6) is combined with the inclined surface of the barb two (35).

6. A retaining structure according to claim 5 wherein: The top of the support plate one (3) is fixedly provided with a limiting frame (7), the inside of the limiting frame (7) is slidably provided with a limiting rod two (37) through a spring eight (38), the left side of the limiting rod two (37) extends out of the inside of the limiting frame (7), the top of the movable rod (6) extends out of the top of the support plate one (3), and the left side of the limiting rod two (37) and the movable rod (6) are extruded with each other.

7. A retaining structure according to claim 6 wherein: The inside of the inserting rod two (12) of the left side of the baffle piece one (13) is slidably provided with a barb one (31) through a spring five (32), the inner side of the barb one (31) is provided with an inclined surface which inclines to the outside of the bottom, the inside of the inserting rod two (12) and the support plate two (8) is inserted with a connecting rod (10), the bottom of the connecting rod (10) is combined with the inclined surface of the barb one (31).

8. A retaining structure according to claim 7, wherein: The right side of the support plate two (8) is fixedly provided with a fixing frame (11), the inside of the fixing frame (11) is slidably provided with a limiting rod one (33) through a spring six (34), the bottom of the limiting rod one (33) extends out of the inside of the fixing frame (11), the right side of the connecting rod (10) extends out of the inside of the support plate two (8), and the bottom of the limiting rod one (33) and the connecting rod (10) are extruded with each other.

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