A construction aid

Abstract

The application provides a kind of building construction auxiliary device, belongs to building construction technical field.Its technical scheme is: including installation frame, fixed mechanism is arranged on installation frame, guardrail mechanism is arranged in installation frame;Installation frame includes a pair of L-shaped structure main frame and a pair of L-shaped structure auxiliary frame, main frame includes transversely arranged horizontal rod one and vertically arranged vertical rod one, auxiliary frame includes transversely arranged horizontal rod two and vertically arranged vertical rod two, the end face of horizontal rod one and vertical rod one is all provided with sliding slot one, horizontal rod two and vertical rod two are slidably arranged in corresponding sliding slot one, a pair of main frame and a pair of auxiliary frame are inserted after surrounding rectangular installation frame.The beneficial effects of the application are: the application can be used as a protective window temporarily in construction, suitable for rectangular window hole, and can be freely adjusted according to the size of window hole.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more particularly to a building construction auxiliary device. Background Technology

[0002] In buildings, the inner walls of window openings typically have pre-drilled holes for installing windows. Generally, during construction, window openings are exposed before window installation, and windows are not installed in the short term because of the need to transport building materials into the building through relatively large openings. This creates a safety hazard during interior construction, as workers could fall through, or construction materials could fall and injure people. Summary of the Invention

[0003] The purpose of this invention is to provide a building construction auxiliary device that is simple to operate and has safety protection.

[0004] This invention is achieved through the following measures:

[0005] A construction auxiliary device, characterized in that it includes an installation frame, a fixing mechanism is provided on the installation frame, and a guardrail mechanism is provided inside the installation frame;

[0006] The mounting frame includes a pair of L-shaped main frames and a pair of L-shaped sub-frames. The main frame includes a horizontally arranged horizontal rod and a vertically arranged vertical rod. The sub-frame includes a horizontally arranged second horizontal rod and a vertically arranged second vertical rod. Each of the horizontal rod and the vertical rod has a groove on its end face. The horizontal rod and the vertical rod are slidably arranged in their respective grooves. The pair of main frames and the pair of sub-frames are interlocked to form a rectangular mounting frame.

[0007] The invention also has the following specific features:

[0008] The guardrail mechanism includes a telescopic fence and a telescopic mechanism installed on the telescopic fence;

[0009] The telescopic fence includes a pair of parallel side bars, and a number of interlocking diagonal bars are provided between the two side bars.

[0010] The telescopic mechanism includes several vertical rods parallel to the side rods. The vertical rods are arranged between the two side rods. The vertical rods are set on the corresponding inclined rods through two hinge points. T-shaped grooves are provided on both outer sides of the vertical rods away from the inclined rods. The T-shaped grooves on both sides pass through the two end faces of the vertical rods respectively. Matching T-shaped slide rods are slidably arranged in the T-shaped grooves on both sides.

[0011] The T-shaped slide bar is provided with a connecting rod. The connecting rod is located near the inner end of the T-shaped slide bar facing the middle of the side rod. The connecting rod includes a rod one and a rod two. One end face of the rod one is fixed to the middle of the end face of the rod two. The end face of the rod two away from the rod one is provided with a groove two that mates with the rod one. The rod one on one side of the T-shaped slide bar is slidably disposed in the groove two on the adjacent side of the T-shaped slide bar.

[0012] On one side, several T-shaped sliding rods are connected by corresponding connecting rods to form an upper sliding part, and on the other side, several T-shaped sliding rods are connected by corresponding connecting rods to form a lower sliding part.

[0013] A drive mechanism is provided on the vertical pole located in the middle of the telescopic fence;

[0014] The driving mechanism includes a pair of transition plates, which are respectively disposed on the T-shaped slide bars on both sides of the vertical rod. Each of the two transition plates is provided with a rack extending towards the middle of the vertical rod. Correspondingly, a motor is disposed in the middle of the vertical rod through a bracket plate. The output end of the motor is provided with a rotating shaft. After the rotating shaft passes through the vertical rod, it is provided with a gear that meshes with the racks on both sides. When the motor rotates, it drives the gears to rotate, which in turn drives the racks on both sides to move, which in turn drives the T-shaped slide bars on both sides to slide outwards simultaneously. Through the connection of the connecting rod, the upper sliding part and the lower sliding part slide to both sides.

[0015] Both the first and second horizontal rods are provided with slots that cooperate with the T-shaped slide rods. The slot on the first horizontal rod extends into the slot on the second horizontal rod. The slots on both sides respectively extend through the free end faces of the first and second horizontal rods. Several T-shaped slide rods are slidably disposed in the slots.

[0016] A groove three is provided on one side of the first horizontal rod. A limit block is provided on the second horizontal rod inserted into the groove three. The limit block is slidably disposed in the groove three to ensure that the first horizontal rod and the second horizontal rod do not separate.

[0017] An auxiliary rod is provided on the inner side of the slot of the horizontal rod 1. The auxiliary rod is close to the slot. A sliding groove 4 is provided on the side of the auxiliary rod. A locking block is slidably disposed in the sliding groove 4. A plurality of springs 1 are provided between the locking block and the inner bottom surface of the sliding groove 4. One end of the spring 1 is disposed on the locking block and the other end of the spring 1 is disposed on the inner bottom surface of the sliding groove 4. Correspondingly, a locking groove is provided on the T-shaped slide rod to cooperate with the locking block. The locking block is disposed in the locking groove. The lower side of the locking block away from the slot is set with an arc structure. When the T-shaped slide rod slides into the slot, it pushes up and pushes the locking block by compressing the spring 1, so that the locking block can be smoothly locked in the locking groove.

[0018] A lead screw is provided on one of the vertical rods that is connected to the locking block. The lead screw passes through the vertical rod and abuts against the locking block. A handle is provided on the outer end of the lead screw. Rotating the handle causes the lead screw to be screwed in, pushing the locking block into the sliding groove, which facilitates the connection between the locking block and the groove.

[0019] Mounting plates are provided on both the horizontal rod 1 and the vertical rod 1. A through groove 5 is provided on both sides of the mounting plates. A groove 6 is provided on the inner side of the opposite sides of the groove 5.

[0020] The fixing mechanism includes a pair of sliding plates, which are slidably disposed in the sliding grooves 6 on both sides. A mounting block is disposed between the two sliding plates. A sliding groove 7 is provided through the mounting block. A vertical rod is slidably disposed in the sliding groove 7. A rack 2 is provided on one side of the vertical rod. Correspondingly, a sliding groove 8 that engages with the rack 2 is provided through the mounting block. The sliding groove 8 communicates with the sliding groove 7. A fixing rod is provided on one end face of the vertical rod. The free end of the fixing rod faces the outside of the rectangular frame. A rotating shaft 2 is provided on the inner bottom surface of the mounting block away from the fixing rod via a bracket plate 2. A gear 2 that meshes with the rack 2 is provided at one end of the rotating shaft 2. A rotating handle is provided at the free end of the rotating shaft 2. The gear 2 can be rotated by rotating the handle, thereby realizing the up and down sliding of the rack 2. This allows the fixing rod to be inserted into the reserved hole to fix the rectangular frame.

[0021] A limiting groove extending through the slide groove is provided on one end face of the mounting block. A limiting plate is provided on the vertical rod. The limiting plate is slidably disposed in the limiting groove. The limiting plate and the limiting groove are used to limit the sliding of the vertical rod.

[0022] A fixing plate is provided on the inner bottom surface of the mounting block. A T-shaped groove is provided on the free end surface of the fixing plate. An H-shaped slider is slidably arranged in the T-shaped groove. A pair of support plates are provided on the H-shaped slider. A rotating shaft is provided between the two support plates. A pawl is provided around the rotating shaft. A ratchet that cooperates with the pawl is provided around the rotating shaft. A torsion spring is provided around the rotating shaft on both sides of the pawl. One end of the torsion spring is provided on the side of the pawl, and the other end of the torsion spring is provided on the corresponding support plate. The torsion spring allows the pawl to cooperate with the ratchet.

[0023] An extension plate is provided on the fixed plate, and a second spring is provided between the extension plate and the H-shaped slider. One end of the second spring is fixed on the H-shaped slider, and the other end of the second spring is fixed on the extension plate.

[0024] A second handle is provided on one side of the H-shaped slider. Sliding the second handle can disengage the pawl and the ratchet.

[0025] An L-shaped limiting plate that mates with the side rod is provided on the inner side of the vertical rod. A bolt that passes through the side rod is provided on the side rod. Correspondingly, the L-shaped limiting plate is provided with a threaded hole that mates with the bolt. The bolt passes through the side rod and is placed in the threaded hole.

[0026] In use, first install the guardrail mechanism in the mounting frame. During installation, install the side rod in the L-shaped limiting plate and fix it with bolts. Then, place the entire device in the window opening. Then, use the motor to make the upper sliding part slide upward and the lower sliding part slide downward until the corresponding T-shaped sliding rod is inserted into the slot and the upper and lower sides of the mounting frame are against the upper and lower sides of the inner side of the window opening. Then, stretch the mounting frame to the left and right so that the left and right sides of the mounting frame are against the left and right sides of the inner side of the window opening. Then, slide the fixing mechanism to the position of the reserved hole. Then, rotate the rotating handle to insert the fixing rod into the reserved hole, thus fixing the entire device. Due to the limiting effect of the ratchet and pawl, the fixing rod will not disengage after being inserted into the reserved hole. When it needs to be removed, simply slide the handle to release the engagement of the pawl and the ratchet.

[0027] The beneficial effects of this invention are as follows: During construction, it can be temporarily used as a protective window, suitable for rectangular window openings, and can be freely adjusted according to the size of the window opening. This invention blocks window openings that are not currently being installed, forming a protective window. The guardrail mechanism in this invention has a blocking function and is also easy to disassemble. Under safe conditions, it can be conveniently used as a temporary transportation passage through the window opening. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the retractable fence in an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the structure of the drive mechanism and related components in an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the main frame components in an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the structure of the sub-frame related components in an embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of the assembly structure of the main frame and the sub-frame in an embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of the fixing mechanism in an embodiment of the present invention.

[0035] Figure 8 This is a schematic diagram of the assembly of the card block and the T-shaped slide bar in an embodiment of the present invention.

[0036] Figure 9 for Figure 8 A magnified view of A in the middle.

[0037] The attached diagram is labeled as follows: 1. Main frame; 2. Sub-frame; 3. T-shaped slide bar; 4. Connecting rod; 5. Diagonal rod; 6. Vertical rod; 7. Side rod; 8. Rack 1; 9. Gear 1; 10. T-shaped slide groove 1; 11. Fixing mechanism; 12. Motor; 13. Rod 1; 14. Rod 2; 15. Slide groove 4; 16. Slide groove 1; 17. Slot; 18. Slide groove 6; 19. Slide groove 5; 20. L-shaped limiting plate; 21. Limiting block. 22. Slide three; 23. Slide plate; 24. Mounting block; 25. Fixing rod; 26. Limiting plate; 27. Limiting groove; 28. Gear two; 29. ​​Rack two; 30. Vertical rod; 31. Ratchet; 32. Rotating handle; 33. Rotating shaft two; 34. Pawl; 35. Torsion spring; 36. H-shaped slider; 37. Handle two; 38. Spring two; 39. Fixing plate; 40. Locking block; 41. Lead screw; 42. Bolt. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0042] See Figure 1-9 A construction auxiliary device includes an installation frame, a fixing mechanism 11 on the installation frame, and a guardrail mechanism inside the installation frame.

[0043] The mounting frame includes a pair of L-shaped main frames 1 and a pair of L-shaped sub-frames 2. The main frame 1 includes a horizontally arranged horizontal rod 1 and a vertically arranged vertical rod 1. The sub-frame 2 includes a horizontally arranged horizontal rod 2 and a vertically arranged vertical rod 2. The end faces of the horizontal rod 1 and the vertical rod 1 are provided with sliding grooves 16. The horizontal rod 2 and the vertical rod 2 are respectively slidably arranged in the corresponding sliding grooves 16. The pair of main frames 1 and the pair of sub-frames 2 are interlocked to form a rectangular mounting frame.

[0044] The guardrail mechanism includes a telescopic fence and a telescopic mechanism installed on the telescopic fence;

[0045] The telescopic fence includes a pair of parallel side bars 7, and several interlocking diagonal bars 5 are provided between the two side bars 7.

[0046] The telescopic mechanism includes several vertical rods 6 parallel to the side rods 7. The vertical rods 6 are arranged between the two side rods 7. The vertical rods 6 are set on the corresponding diagonal rods 5 through two hinge points. T-shaped slide grooves 10 are provided on both sides of the outer side of the vertical rods 6 away from the diagonal rods 5. The two T-shaped slide grooves 10 pass through the two end faces of the vertical rods 6 respectively. T-shaped slide rods 3 are slidably arranged in the two T-shaped slide grooves 10.

[0047] A connecting rod 4 is provided on the T-shaped slide bar 3. The connecting rod 4 is located near the inner end of the T-shaped slide bar 3 facing the middle of the side rod 7. The connecting rod 4 includes a first rod 13 and a second rod 14. One end face of the first rod 13 is fixed to the middle of the end face of the second rod 14. The end face of the second rod 14 away from the first rod 13 is provided with a second groove that mates with the first rod 13. The first rod 13 on one side of the T-shaped slide bar 3 is slidably disposed in the second groove on the adjacent side of the T-shaped slide bar 3.

[0048] Several T-shaped slide bars 3 on one side are connected by corresponding connecting rods 4 to form an upper sliding part, and several T-shaped slide bars 3 on the other side are connected by corresponding connecting rods 4 to form a lower sliding part.

[0049] A drive mechanism is installed on the vertical pole 6 located in the middle of the telescopic fence;

[0050] The drive mechanism includes a pair of transition plates, which are respectively set on the T-shaped slide bars 3 on both sides of the vertical rod 6. Each of the two transition plates is provided with a rack 8 extending towards the middle of the vertical rod 6. A motor 12 is provided in the middle of the vertical rod 6 through a bracket plate. A rotating shaft is provided at the output end of the motor 12. After the rotating shaft passes through the vertical rod 6, a gear 9 is provided that meshes with both racks 8. When the motor 12 rotates, it drives the gear 9 to rotate, which in turn drives the racks 8 on both sides to move, which in turn drives the T-shaped slide bars 3 on both sides to slide outwards at the same time. Through the connection of the connecting rod 4, the upper sliding part and the lower sliding part slide to both sides.

[0051] Both the first and second horizontal rods are provided with slots 17 that cooperate with the T-shaped slide rods 3. The slot 17 on the first horizontal rod extends into the slot 17 on the second horizontal rod. The slots 17 on both sides extend through the free end faces of the first and second horizontal rods respectively. Several T-shaped slide rods 3 are slidably arranged in the slots 17.

[0052] A sliding groove 22 is provided on one side of the horizontal rod 1. A limiting block 21 is provided on the horizontal rod 2 inserted into the sliding groove 16. The limiting block 21 is slidably disposed in the sliding groove 22 to ensure that the horizontal rod 1 and the horizontal rod 2 do not separate.

[0053] An auxiliary rod is provided on the inner side of the horizontal rod with the slot 17. The auxiliary rod is close to the slot 17. A sliding groove 15 is provided on the side of the auxiliary rod. A locking block 40 is slidably arranged in the sliding groove 15. Several springs are provided between the locking block 40 and the inner bottom surface of the sliding groove 15. One end of the spring is set on the locking block 40, and the other end of the spring is set on the inner bottom surface of the sliding groove 15. A corresponding T-shaped slide rod 3 is provided with a slot that cooperates with the locking block 40. The locking block 40 is set in the slot. The lower side of the locking block 40 away from the slot 17 is set with an arc structure. When the T-shaped slide rod 3 is slidably inserted into the slot 17, it is pushed up and the locking block 40 is pushed by the compression spring, so that the locking block 40 can be smoothly locked in the slot.

[0054] A lead screw 41 is provided on a vertical rod 6 that is connected to the locking block 40. The lead screw 41 passes through the vertical rod 6 and abuts against the locking block 40. A handle is provided on the outer end of the lead screw 41. Rotating the handle causes the lead screw 41 to be screwed in, pushing the locking block 40 into the sliding groove 15, which facilitates the connection between the locking block 40 and the groove.

[0055] Mounting plates are provided on both horizontal and vertical rods. A through groove 519 is provided on both mounting plates. A groove 618 is provided on the inner side of the opposite sides of the groove 519.

[0056] The fixing mechanism 11 includes a pair of sliding plates 23, which are slidably disposed in two side slide grooves 18. A mounting block 24 is disposed between the two side sliding plates 23. A slide groove 7 is provided through the mounting block 24. A vertical rod 30 is slidably disposed in the slide groove 7. A rack 29 is provided on one side of the vertical rod 30. A corresponding slide groove 8 is provided through the mounting block 24 to cooperate with the rack 29. The slide groove 8 is connected to the slide groove 7. A fixing rod 2 is provided on one end face of the vertical rod 30. 5. The free end of the fixing rod 25 faces the outside of the rectangular frame. On the inner bottom surface of the mounting block 24 away from the fixing rod 25, a rotating shaft 33 is provided through the bracket plate. One end of the rotating shaft 33 is provided with a gear 28 that meshes with the rack 29. The free end of the rotating shaft 33 is provided with a rotating handle 32. By rotating the handle 32, the gear 28 can be rotated, thereby realizing the up and down sliding of the rack 29, so that the fixing rod 25 can be inserted into the reserved hole to fix the rectangular frame.

[0057] A limiting groove 27 extending to the slide groove 7 is provided on one end face of the mounting block 24. A limiting plate 26 is provided on the vertical rod 30. The limiting plate 26 is slidably disposed in the limiting groove 27. The limiting plate 26 and the limiting groove 27 realize the limiting sliding of the vertical rod 30.

[0058] A fixing plate 39 is provided on the inner bottom surface of the mounting block 24. A T-shaped slide groove 2 is provided on the free end surface of the fixing plate 39. An H-shaped slider 36 is slidably arranged in the T-shaped slide groove 2. A pair of support plates 3 are provided on the H-shaped slider 36. A rotating shaft 3 is provided between the two support plates 3. A pawl 34 is provided around the rotating shaft 3. A ratchet 31 that cooperates with the pawl 34 is provided around the corresponding rotating shaft 2 33. A torsion spring 35 is provided around the rotating shaft 3 on both sides of the pawl 34. One end of the torsion spring 35 is provided on the side of the pawl 34, and the other end of the torsion spring 35 is provided on the corresponding support plate. The torsion spring 35 can make the pawl 34 cooperate with the ratchet 31.

[0059] An extension plate is provided on the fixed plate 39, and a second spring 38 is provided between the extension plate and the H-shaped slider 36. One end of the second spring 38 is fixed on the H-shaped slider 36, and the other end of the second spring 38 is fixed on the extension plate.

[0060] A handle 37 is provided on one side of the H-shaped slider 36. Sliding the handle 37 can disengage the pawl 34 and the ratchet 31.

[0061] An L-shaped limiting plate 20 that mates with the side rod 7 is provided on the inner side of the vertical rod 1. A bolt 42 that passes through the side rod 7 is provided on the side rod 7. The corresponding L-shaped limiting plate 20 is provided with a threaded hole that mates with the bolt 42. The bolt 42 passes through the side rod 7 and is placed in the threaded hole.

[0062] In use, first install the guardrail mechanism in the mounting frame. During installation, install the side rod 7 in the L-shaped limiting plate 20 and fix it with bolts 42. Then place the entire device in the window opening. Then, use motor 12 to make the upper sliding part slide upward and the lower sliding part slide downward until the corresponding T-shaped sliding rod 3 is inserted into the slot 17 and the upper and lower sides of the mounting frame are against the upper and lower sides of the inner side of the window opening. Then, stretch the mounting frame to the left and right so that the left and right sides of the mounting frame are against the left and right sides of the inner side of the window opening. Then, slide the fixing mechanism 11 to the position of the reserved hole. Then, turn the rotating handle 32 to insert the fixing rod 25 into the reserved hole, and finally fix the entire device. Due to the limiting effect of ratchet 31 and pawl 34, the fixing rod 25 will not come off after being inserted into the reserved hole. When it needs to be removed, simply slide the handle 37 to release the engagement between the pawl 34 and the ratchet 31.

[0063] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A construction auxiliary device, characterized in that, It includes an installation frame, on which a fixing mechanism is provided, and inside the installation frame a guardrail mechanism; The mounting frame includes a pair of L-shaped main frames and a pair of L-shaped sub-frames. The main frame includes a horizontally arranged horizontal rod and a vertically arranged vertical rod. The sub-frame includes a horizontally arranged second horizontal rod and a vertically arranged second vertical rod. Each of the horizontal rod and the vertical rod has a groove on its end face. The horizontal rod and the vertical rod are slidably arranged in their respective grooves. The pair of main frames and the pair of sub-frames are interlocked to form a rectangular mounting frame. The guardrail mechanism includes a telescopic fence and a telescopic mechanism installed on the telescopic fence; The telescopic fence includes a pair of parallel side bars, and a number of interlocking diagonal bars are provided between the two side bars. The telescopic mechanism includes several vertical rods parallel to the side rods. The vertical rods are arranged between the two side rods. The vertical rods are set on the corresponding inclined rods through two hinge points. T-shaped grooves are provided on both outer sides of the vertical rods away from the inclined rods. The T-shaped grooves on both sides pass through the two end faces of the vertical rods respectively. Matching T-shaped sliding rods are slidably arranged in the T-shaped grooves on both sides. Mounting plates are provided on both the horizontal rod 1 and the vertical rod 1. A through groove 5 is provided on both sides of the mounting plates. A groove 6 is provided on the inner side of the opposite sides of the groove 5. The fixing mechanism includes a pair of sliding plates, which are slidably disposed in the sliding grooves 6 on both sides. A mounting block is disposed between the two sliding plates. A sliding groove 7 is provided through the mounting block. A vertical rod is slidably disposed in the sliding groove 7. A rack 2 is provided on one side of the vertical rod. A corresponding sliding groove 8 is provided through the mounting block to engage with the rack 2. The sliding groove 8 is connected to the sliding groove 7. A fixing rod is provided on one end face of the vertical rod. A rotating shaft 2 is provided on the inner bottom surface of the mounting block away from the fixing rod via a bracket plate 2. A gear 2 that meshes with the rack 2 is provided at one end of the rotating shaft 2. A rotating handle is provided at the free end of the rotating shaft 2. A limiting groove extending to the slide groove seven is provided on one end face of the mounting block, and a limiting plate is provided on the vertical rod, the limiting plate being slidably disposed in the limiting groove; A fixing plate is provided on the inner bottom surface of the mounting block. A T-shaped groove is provided on the free end surface of the fixing plate. An H-shaped slider is slidably arranged in the T-shaped groove. A pair of support plates are provided on the H-shaped slider. A rotating shaft is provided between the two support plates. A pawl is provided around the rotating shaft. A ratchet that cooperates with the pawl is provided around the rotating shaft. A torsion spring is provided around the rotating shaft on both sides of the pawl. One end of the torsion spring is provided on the side of the pawl, and the other end of the torsion spring is provided on the corresponding support plate.

2. The construction auxiliary device according to claim 1, characterized in that, The T-shaped slide bar is provided with a connecting rod. The connecting rod is located near the inner end of the T-shaped slide bar facing the middle of the side rod. The connecting rod includes a rod one and a rod two. One end face of the rod one is fixed to the middle of the end face of the rod two. The end face of the rod two away from the rod one is provided with a groove two that cooperates with the rod one. The rod one on one side of the T-shaped slide bar is slidably disposed in the groove two on the adjacent side of the T-shaped slide bar.

3. The construction auxiliary device according to claim 2, characterized in that, A drive mechanism is provided on the vertical pole located in the middle of the telescopic fence; The driving mechanism includes a pair of transition plates, which are respectively disposed on the T-shaped slide bars on both sides of the vertical rod. Each of the two transition plates is provided with a rack extending toward the middle of the vertical rod. Correspondingly, a motor is disposed in the middle of the vertical rod through a bracket plate. The output end of the motor is provided with a rotating shaft. After the rotating shaft passes through the vertical rod, a gear is disposed that meshes with the racks on both sides.

4. The construction auxiliary device according to claim 3, characterized in that, Both the first and second horizontal rods are provided with slots that cooperate with the T-shaped slide bars. The slots on both sides respectively penetrate the free end faces of the first and second horizontal rods, and a plurality of the T-shaped slide bars are slidably disposed in the slots. A sliding groove three is provided on one side of the transverse rod one, and a limiting block is provided on the transverse rod two inserted into the sliding groove one. The limiting block is slidably disposed in the sliding groove three.

5. The construction auxiliary device according to claim 4, characterized in that, An auxiliary rod is provided on the inner side of the slot of the horizontal rod 1. A sliding groove 4 is provided on the side of the auxiliary rod. A locking block is slidably disposed in the sliding groove 4. A plurality of springs 1 are provided between the locking block and the inner bottom surface of the sliding groove 4. One end of the spring 1 is disposed on the locking block and the other end of the spring 1 is disposed on the inner bottom surface of the sliding groove 4. Correspondingly, a locking groove is provided on the T-shaped sliding rod to cooperate with the locking block. The locking block is disposed in the locking groove. The lower side of the locking block away from the slot is set with an arc structure. A lead screw is provided on one of the vertical rods that is connected to the locking block. The lead screw passes through the vertical rod and abuts against the locking block. A handle is provided on the outer end of the lead screw.

6. The construction auxiliary device according to claim 1, characterized in that, An extension plate is provided on the fixed plate, and a second spring is provided between the extension plate and the H-shaped slider. One end of the second spring is fixed on the H-shaped slider, and the other end of the second spring is fixed on the extension plate. A handle is provided on one side of the H-shaped slider.

7. The construction auxiliary device according to claim 2, characterized in that, An L-shaped limiting plate that mates with the side rod is provided on the inner side of the vertical rod. A bolt that passes through the side rod is provided on the side rod. Correspondingly, the L-shaped limiting plate is provided with a threaded hole that mates with the bolt. The bolt passes through the side rod and is placed in the threaded hole.

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