A device for adjusting deformation of inner side formwork of a double-layer formwork system and a construction method thereof
By opening an adjustment hole between the outer texture template and the wooden support template, using a pull rod and a clamping device to level the bulging template, and fixing it with fixing parts, the problem of bulging outer texture template was solved, and the flatness and decorative effect of the plain concrete surface were improved.
Patent Information
- Application Number
- CN202410102728.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2044-01-24
AI Technical Summary
In the existing technology, the outer pattern template is easily bulged due to moisture and other reasons during the pouring process, resulting in grooves on the surface of the plain concrete. The repair is complicated and affects the decorative effect, and the existing repair methods are limited in effect.
An adjustment hole is opened between the outer texture template and the wooden support template. The bulging template is leveled by a pull rod and a clamp device, and fixed with fixing parts. The hole is then sealed to ensure that the template is flat.
It achieves effective leveling of bulges at any position of the outer texture template, ensures the flatness and decorative effect of the plain concrete surface, simplifies the operation process, reduces costs and reduces repair work.
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Figure CN117846284B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of the field of fair-faced concrete, in particular to a device for adjusting deformation of inner formwork of a double-layer formwork system and a construction method thereof. BACKGROUND
[0002] Fair-faced concrete is a performance technique of architectural modernism, also known as decorative concrete due to its high decorative effect. It is formed by one-time pouring and does not have any decoration such as coating, tiling, and tiling of stone materials, and is a kind of bare-faced technique for presenting concrete.
[0003] When pouring fair-faced concrete with wood grain lines, a double-layer formwork is needed, which includes a wood support formwork and an outer grain formwork. The outer grain formwork is usually a raw wood batten, and the outer grain formwork is nailed to the wood support formwork piece by piece, and the nails do not penetrate the outer grain formwork. Before pouring after the double-layer formwork is fixed, sometimes a piece of outer grain formwork is swollen due to reasons such as moisture, causing a concave groove on the outer surface of the poured fair-faced concrete. In order to ensure the appearance of the fair-faced concrete, the subsequently poured fair-faced concrete is usually repaired after forming. The repair area is large, the operation is repeated and complex, the construction efficiency is low, and when the color of the mortar used in one repair site is inconsistent with the color of the fair-faced concrete, the decorative effect of the fair-faced concrete is greatly reduced.
[0004] The current solution to the swelling of the outer grain formwork is to fix a piece of square wood, which exerts force on the wood support formwork to pull the swollen outer grain formwork. However, the above method only has a certain effect on the swelling of the outer grain formwork, but the outer grain formwork in other places will still swell to a certain extent and need to be repaired. SUMMARY
[0005] In order to better repair the swelling of the outer grain formwork, the present application provides a device for adjusting deformation of inner formwork of a double-layer formwork system and a construction method thereof.
[0006] In a first aspect, the device for adjusting deformation of inner formwork of a double-layer formwork system provided by the present application adopts the following technical solution:
[0007] A device for adjusting deformation of inner formwork of a double-layer formwork system, comprising
[0008] a double-layer formwork body, the double-layer formwork body comprising an outer grain formwork and a wood support formwork arranged outside the outer grain formwork spliced together, the double-layer formwork body having an adjusting hole at a swollen position, the adjusting hole being a through hole;
[0009] The adjusting device comprises a pull rod, a clamping piece and a screwing piece, the pull rod penetrates the outer layer texture template and the wood support template through the adjusting hole, the clamping piece is arranged at one end of the pull rod and abuts against the outer layer texture template, and the screwing piece is located at one side of the wood support template and screws the clamping piece arranged on the pull rod.
[0010] By adopting the technical scheme, the pull rod and the clamping piece are located at one side of the outer layer texture template through the adjusting hole on the convexly deformed double-layer template body, the screwing piece is pulled and fixed to screw the pull rod and the clamping piece towards the wood support template, the bulging outer layer texture template is leveled, and the cast-in-place concrete is poured after leveling. This mode can adjust the bulging of the outer layer texture template at any position, maximally restores the bulging outer layer texture template, and thus guarantees the flatness of the concrete surface after pouring.
[0011] Preferably, the clamping piece comprises a baffle, a push rod and a rotating ring, the rotating ring is sleeved on the pull rod and is threadedly connected with the pull rod, the baffle is oppositely arranged, a sliding ring is arranged between the baffles and is sleeved on the pull rod and slides with the pull rod, the sliding ring is arranged in the adjusting hole, one end of the sliding ring is hinged to the baffle at one side of the outer layer texture template, and the other end of the sliding ring is a flange surface and abuts against the wood support template at one side of the wood support template, one end of the push rod is hinged to the rotating ring, and the other end of the push rod is hinged to the baffle.
[0012] By adopting the technical scheme, the rotating ring can be moved towards the outer layer texture template by rotating the pull rod, the baffle is unfolded under the action of the push rod until the baffle is attached to the outer layer texture template, the bulging part of the outer layer texture template is leveled under the action of the baffle by continuously rotating the pull rod, the overall structure is simple, and the operation is convenient.
[0013] Preferably, the length of the push rod is greater than the length of the baffle.
[0014] By adopting the technical scheme, the hinged point of the push rod and the baffle moves away from the pull rod shaft under the action of the rotating ring, the length of the push rod is greater than the length of the baffle, the baffle can be pushed to be attached to the outer layer texture template in a larger area perpendicular to the pull rod shaft, and a better leveling effect is achieved.
[0015] Preferably, the flange surface of the sliding ring is a non-smooth surface close to the wood support template.
[0016] By adopting the technical scheme, the abutting surface of the sliding ring and the wood support template is non-smooth and does not rotate with the pull rod, the corresponding rotating ring can only move along the axis of the pull rod, and the clamping piece moves towards the outer layer texture template when the pull rod rotates.
[0017] Preferably, the adjusting device further comprises a hard gasket, which is sleeved on the pull rod and located outside the wood support template.
[0018] By using the above technical scheme, the force required to flatten the bulge is large, the end of the pull rod located outside the wood support template is attached to the surface of the wood support template, and a hard gasket is added to prevent deformation of the wood support template during adjustment.
[0019] Preferably, after the adjusting device flattens the bulge of the outer texture template, a fixing member is used to fix the adjusted outer texture template on the wood support template, and the adjusting device is removed after the fixing member fixes the outer texture template and the wood support template.
[0020] By using the above technical scheme, after the bulging outer texture template is flattened, it is fixed with the wood support template by a fixing member, and the adjusting device is removed after being fixed, which facilitates the repeated use of the adjusting device and saves the use cost.
[0021] Preferably, the fixing member is evenly arranged in multiple along the circumference of the adjusting hole.
[0022] By using the above technical scheme, the fixing member is evenly arranged along the circumference of the adjusting hole, so that the outer texture template can be tightly fixed on the wood support template to prevent deformation of the outer texture template.
[0023] Preferably, the fixing member is a self-tapping screw, and the length of the self-tapping screw is less than the thickness of the double-layer template body.
[0024] By using the above technical scheme, the flattened outer texture template can be directly fixed from one side of the wood support template by the self-tapping screw, which is convenient and fast, and the length of the self-tapping screw is less than the thickness of the double-layer template body, so that the outer texture template cannot be penetrated, and the pouring of concrete is not affected.
[0025] Preferably, it further comprises a plugging member, which is used to plug the adjusting hole after the adjusting device is removed.
[0026] By using the above technical scheme, the adjusting hole after the adjusting device is removed is plugged to avoid the outflow of concrete from the adjusting hole during pouring, and the defect left in the later period is small and easy to repair.
[0027] In the second aspect, the application provides a construction method for adjusting the deformation of the inner template of a double-layer template system, which adopts the following technical scheme:
[0028] A construction method for adjusting the deformation of the inner template of a double-layer template system, comprising the following steps:
[0029] Measuring and marking the specific bulging position;
[0030] Drilling adjustment hole at bulging position using hole drill;
[0031] Inserting adjustment device into adjustment hole;
[0032] Rotating pull rod to open baffle against outer layer texture template surface;
[0033] Continuously rotating pull rod to flatten protruding outer layer texture template;
[0034] Tightening screw on one side of wood support template along adjustment hole circumference to make outer layer texture template re-adhere to wood support template;
[0035] Reversely rotating pull rod to take out adjustment device;
[0036] Installing plugging piece from outside into adjustment hole to plug adjustment hole;
[0037] Pouring concrete in template;
[0038] Repairing adjustment hole after form removal.
[0039] By adopting the technical scheme, the construction method for deforming adjustment of inner template of double-layer template system comprises the following steps: first step, measuring and marking specific bulging position; second step, drilling adjustment hole at bulging position using hole drill; third step, inserting adjustment device into adjustment hole; fourth step, rotating pull rod to open baffle against outer layer texture template surface; fifth step, continuously rotating pull rod to flatten protruding outer layer texture template; sixth step, tightening screw on one side of wood support template along adjustment hole circumference to make outer layer texture template re-adhere to wood support template; seventh step, reversely rotating pull rod to take out adjustment device; eighth step, installing plugging piece from outside into adjustment hole to plug adjustment hole; ninth step, pouring concrete in template; and tenth step, repairing adjustment hole after form removal. In this way, any bulging position can be flattened, and the adjustment device can be recycled after flattening, which is convenient, fast and low in cost; any reinforcing member is not needed, and large operation space is not needed, any position can be used, and the defect left after removal is small and easy to repair.
[0040] In conclusion, the present application has at least one of the following beneficial technical effects:
[0041] 1. Drilling adjustment hole on protruding deformed double-layer template body, passing pull rod and clamping piece through adjustment hole to one side of outer layer texture template, tightening and fixing rotating member to tighten pull rod and clamping piece towards wood support template direction, flattening bulging outer layer texture template, and pouring cast concrete after flattening, which can adjust bulging outer layer texture template at any position, maximally restore bulging outer layer texture template, and thus guarantee the flatness of concrete surface after pouring;
[0042] 2. The outer rotating pull rod can move the rotating ring towards the outer layer texture template, the baffle is unfolded under the action of the push rod until it is attached to the outer layer texture template, and the outer layer texture template is pulled flat under the action of the baffle by continuing to rotate the pull rod, the overall structure is simple, and operation is convenient;
[0043] 3. After the outer layer texture template is leveled, it is fixed through the fixing piece and the wood support template, and after fixing, the adjusting device is removed, so that the adjusting device is repeatedly used, and the use cost is saved. BRIEF DESCRIPTION OF DRAWINGS
[0044] Figure 1 is a structure schematic view of the device for adjusting deformation of an inner template of a double-layer template system and a construction method thereof according to the present application.
[0045] Figure 2 is a sectional view of the adjusting device.
[0046] Figure 3 is a fastening structure schematic view after the convex is leveled.
[0047] Figure 4 is Figure 3 A-A sectional view.
[0048] BRIEF DESCRIPTION OF DRAWINGS 1. Double-layer template body; 11, outer layer texture template; 12, wood support template; 13, adjusting hole; 2, adjusting device; 21, pull rod; 22, clamping piece; 221, baffle; 222, push rod; 223, rotating ring; 224, sliding ring; 23, screwing piece; 24, hard gasket; 3, fixing piece; 4, plugging piece. DETAILED DESCRIPTION
[0049] The following will be combined with the drawings Figures 1-4 The present application is further described in detail.
[0050] The embodiment of the present application discloses a device for adjusting deformation of an inner template of a double-layer template system and a construction method thereof. Referring to Figure 1 , the device for adjusting deformation of the inner template of the double-layer template system comprises a double-layer template body 1 and an adjusting device 2.
[0051] Referring to Figure 1 , the double-layer template body 1 comprises an outer layer texture template 11 and a wood support template 12 arranged outside the outer layer texture template 11.
[0052] The outer layer texture template 11 is a long strip type wood board, one end of the wood board is provided with a groove, the other end is provided with a convex block, the wood board is spliced through the groove and the convex block, and the spliced outer layer texture template 11 and the wood support template 12 are connected into an integrated whole in a glue adhering manner.
[0053] The convex part of the outer layer texture template 11 is provided with an adjusting hole 13.
[0054] Referring to Figure 1 , Figure 2 The adjusting device 2 comprises a pull rod 21, a clamping piece 22, a screwing piece 23 and a hard gasket 24.
[0055] The pull rod 21 can be a threaded rod, one end of the threaded rod is provided with a polygonal shaft, specifically a hexagonal rod, the smallest edge distance of the hexagonal rod is greater than the diameter of the pull rod 21, the screwing piece 23 is a sleeve corresponding to the hexagonal shape, one end of the sleeve is sleeved on the pull rod 21, the other end is connected with a motor, and the sleeve is driven to rotate by the motor output shaft, further driving the pull rod 21 to rotate.
[0056] The clamping piece 22 comprises a baffle 221, a push rod 222, a rotating ring 223 and a sliding ring 224.
[0057] The rotating ring 223 is sleeved on the pull rod 21, and the inside is provided with threads and connected with the pull rod 21 in a threaded manner; the sliding ring 224 is sleeved on the pull rod 21 and the outer ring is arranged in the adjusting hole 13, one end of the sliding ring 224 is provided with a flange surface, the flange surface is in abutment with the wood support template 12, and the abutment surface is provided as a rough surface, and the length of the sliding ring 224 is greater than the thickness of the double-layer template body 1.
[0058] Sliding grooves are arranged on the opposite side walls of the sliding ring 224 in the direction of parallel axis, the sliding grooves can be T-shaped grooves or dovetail grooves, and in the embodiment, the sliding grooves are T-shaped grooves, sliding blocks corresponding to the sliding grooves are arranged, and the baffles 221 are arranged in pairs and hinged with the sliding blocks of the sliding ring 224.
[0059] The push rod 222 is arranged as two corresponding rod pieces, one end of the rod pieces is hinged with the sliding ring 224, the other end is hinged with the other end of the baffle 221 away from the sliding ring 224, the length of the push rod 222 is greater than the length of the baffle 221, and in use, the baffle 221 is pushed to a state parallel to the plane of the outer layer texture template 11 by the push rod 222, and is in abutment with the outer layer texture template 11.
[0060] The hard gasket 24 is sleeved on the pull rod 21, and the specific position is close to one side of the hexagonal rod. The thickness of the hard gasket 24 can be 5mm, and the outer diameter can be 3 times the diameter of the adjusting hole 13, so as to prevent the double-layer template body 1 around the adjusting hole 13 from being deformed when the bulging part is leveled.
[0061] The adjusting device 2 is a prefabricated part, which can be directly inserted into the adjusting hole 13 in use.
[0062] Referring to Figures 3-4Also include fixing piece 3 and blocking piece 4, fixing piece 3 can be provided with self-tapping screw, after the bulging position is flattened, the outer layer texture template 11 and the wood support template 12 are re-fixed by setting four self-tapping screws around the adjusting hole 13, the adjusting device 2 is unscrewed and taken out after the fixing is completed, then the adjusting hole 13 is blocked by using the blocking piece 4, then pouring is carried out.
[0063] The implementation principle of the device for adjusting the deformation of the inner side template of the double-layer template system in the embodiment of the application is as follows: the adjusting hole 13 is formed in the bulging double-layer template body 1, the pull rod 21 and the clamping piece 22 are located on the side of the outer layer texture template 11 through the adjusting hole 13, the pull rod 21 and the clamping piece 22 are tightened and fixed by the screwing piece 23, the bulging outer layer texture template 11 is adjusted to be flat, the cast-in-place concrete is poured after being adjusted to be flat, the bulging outer layer texture template 11 can be adjusted at any position, the bulging outer layer texture template 11 is restored to the greatest extent, and therefore the flatness of the surface of the poured concrete is ensured, and the adjusting device 2 can be rotated in the reverse direction to take out the adjusting device for reuse, thereby saving the use cost.
[0064] The embodiment of the application further discloses a construction method for adjusting the deformation of the inner side template of the double-layer template system. Figure 1 The construction method for adjusting the deformation of the inner side template of the double-layer template system comprises the following steps.
[0065] S1, measuring and marking the specific bulging position;
[0066] Specifically, the method comprises the following steps.
[0067] S11, measuring the bulging position;
[0068] The bulging position is observed above the fixed double-layer template body 1, and the specific bulging position is measured on the side of the outer layer texture template 11 by using a flexible ruler.
[0069] S12, marking points;
[0070] According to the measured position data, the points are marked on the side of the wood support template 12, and all the bulging positions that need to be adjusted are marked.
[0071] S2, drilling the adjusting hole 13 at the bulging position by using a hole drilling machine;
[0072] The double-layer template body 1 is drilled by using the hole drilling machine according to the marked position, and the drilled hole is a through hole.
[0073] S3, inserting the adjusting device 2 into the adjusting hole 13;
[0074] The adjusting device 2 is a prefabricated part, and the baffle 221 is in an initial state without being opened. The adjusting device 2 is inserted into the adjusting hole 13. At this time, the flange surface of the sliding ring 224, the hard gasket 24 and the hexagonal rod of the pull rod 21 are left on one side of the wood support template 12.
[0075] S4, rotating the pull rod 21 to open the baffle 221 to abut against the surface of the outer layer texture template 11;
[0076] Specifically, the following steps are included:
[0077] S41, fixing the screwing part 23 on the output shaft of the motor;
[0078] S42, sleeving the screwing part 23 on the hexagonal rod of the pull rod 21, starting the motor to drive the pull rod 21 to rotate and open the baffle 221.
[0079] S5, continuously rotating the pull rod 21 to adjust the convex outer layer texture template 11 to be flat;
[0080] After the baffle 221 abuts against the outer layer texture template 11, the pull rod 21 is continuously rotated to abut the hexagonal rod against the hard gasket 24, and the rotation is continuously performed until the outer layer texture template 11 is adjusted to be flat.
[0081] S6, tightening the screws on the wood support template 12 on one side along the circumference of the adjusting hole 13 to make the outer layer texture template and the wood support template re-tightly attached;
[0082] After the outer layer texture template 11 is adjusted to be flat, the screwing part 23 and the motor are removed, and four self-tapping screws are uniformly installed around the adjusting hole 13 to fix the outer layer texture template 11 and the wood support template 12.
[0083] S7, reversely rotating the pull rod 21 to take out the adjusting device 2;
[0084] After the outer layer texture template 11 and the wood support template 12 are fixed, the screwing part 23 is sleeved on the hexagonal rod, and the pull rod 21 is reversely rotated to change the state of the baffle 221 from abutting against the outer layer texture template 11 to the initial state, and the adjusting device 2 is taken out.
[0085] S8, installing the plugging part 4 into the adjusting hole 13 from the outside to plug the adjusting hole 13;
[0086] The adjusting hole 13 is plugged by the plugging part 4 before pouring, and the diameter of the plugging part 4 is equal to the diameter of the adjusting hole 13 to ensure the sealing property of the plugging.
[0087] S9, pouring concrete in the template;
[0088] The concrete is poured in the plugged template.
[0089] S10, after the removal of the adjustment hole 13 repair;
[0090] After the pouring of the concrete solidification, the double-layer formwork body 1 is disassembled, the originally leveled position is repaired due to the difference between the surface of the blocking piece 4 and the outer layer texture formwork 11, and the integrity and aesthetics of the texture are ensured.
[0091] The implementation principle of the construction method for the deformation adjustment of the inner side formwork of the double-layer formwork system is as follows: during construction, first, the specific bulging position is measured and marked; second, the adjustment hole 13 is drilled at the bulging position using a hole opener; third, the adjustment device 2 is inserted into the adjustment hole 13; fourth, the pull rod 21 is rotated to open the baffle 221 against the surface of the outer layer texture formwork 11; fifth, the protruding outer layer texture formwork 11 is leveled by continuously rotating the pull rod 21; sixth, the screw is tightened along the circumference of the adjustment hole 13 on one side of the wood support formwork 12, so that the outer layer texture formwork and the wood support formwork are reattached; seventh, the adjustment device 2 is removed by reversing the rotation of the pull rod 21; eighth, the blocking piece 4 is installed from the outside into the adjustment hole 13 to block the adjustment hole 13; ninth, the concrete is poured in the formwork; and tenth, after the removal of the formwork, the adjustment hole 13 is repaired. In this way, the bulging position is leveled, the adjustment device 2 is recycled after leveling, which is convenient and fast and low in cost; without the aid of any reinforcing member, a large operating space is not required, any position can be used, and the remaining defects after removal are small and easy to repair.
[0092] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A device for adjusting the deformation of the inner template of a double-layer template system, characterized by: include A double-layer template body (1), the double-layer template body (1) comprising an outer layer pattern template (11) spliced together and a wooden support template (12) arranged outside the outer layer pattern template (11), the double-layer template body (1) having an adjustment hole (13) at a bulging position, the adjustment hole (13) being a through hole; An adjusting device (2), the adjusting device (2) comprises a pull rod (21), a clamping piece (22) and a tightening piece (23), the pull rod (21) penetrates the outer texture template (11) and the wooden support template (12) through the adjusting hole (13), the clamping piece (22) is arranged at one end of the pull rod (21) and abuts against the outer texture template (11), the tightening piece (23) is located on one side of the wooden support template (12) and tightens the clamping piece (22) arranged on the pull rod (21), the clamping piece (22) comprises a baffle (221), a push rod (222) and a rotating ring (223), the rotating ring (223) is sleeved On the pull rod (21) and threadedly connected to the pull rod (21), two baffles (221) are arranged opposite to each other and a sliding ring (224) is arranged in the middle of the baffles (221) and is sleeved on the pull rod (21) and slides with the pull rod (21). The sliding ring (224) is passed through the inside of the adjustment hole (13), one end of which is hinged to the baffle (221) on one side of the outer texture template (11), and the other end is a flange surface on one side of the wooden support template (12) and abuts against the surface of the wooden support template (12). One end of the push rod (222) is hinged to the rotating ring (223), and the other end is hinged to the baffle (221).
2. The device for adjusting the deformation of the inner template of the double-layer template system according to claim 1 is characterized in that: The length of the push rod (222) is greater than the length of the baffle (221).
3. The device for adjusting the deformation of the inner template of the double-layer template system according to claim 1 is characterized in that: The side of the flange surface of the sliding ring (224) close to the wooden support template (12) is a non-smooth surface.
4. The device for adjusting the deformation of the inner formwork of a double-layer formwork system according to any one of claims 1 to 3, characterized in that: The adjustment device (2) further comprises a hard gasket (24), which is sleeved on the pull rod (21) and located outside the wooden support template (12).
5. The device for adjusting the deformation of the inner formwork of a double-layer formwork system according to claim 1 is characterized in that: After the adjusting device (2) levels the bulging outer layer texture template (11), the adjusted outer layer texture template (11) is fixed to the wooden support template (12) using a fixing member (3). After the fixing member (3) fixes the outer layer texture template (11) and the wooden support template (12), the adjusting device (2) is removed.
6. The device for adjusting the deformation of the inner formwork of a double-layer formwork system according to claim 5, characterized in that: A plurality of the fixing members (3) are evenly arranged along the circumference of the adjustment hole (13).
7. The device for adjusting the deformation of the inner template of the double-layer template system according to claim 6 is characterized in that: The fixing member (3) is configured as a self-tapping screw, and the length of the self-tapping screw is smaller than the thickness of the double-layer formwork body (1).
8. The device for adjusting the deformation of the inner formwork of a double-layer formwork system according to claim 5, characterized in that: It also includes a blocking piece (4), which is used to block the adjustment hole (13) after the adjustment device (2) is removed.
9. A construction method for adjusting the deformation of the inner formwork of a double-layer formwork system, using the device for adjusting the deformation of the inner formwork of a double-layer formwork system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Measure the specific bulge location and mark it; Drill an adjustment hole (13) at the bulge position using a hole drill; Inserting the adjustment device (2) into the adjustment hole (13); Rotate the pull rod (21) to open the baffle (221) and abut against the surface of the outer texture template (11); Continuously rotate the pull rod (21) to level the raised outer pattern template (11); Tighten the screws along the circumference of the adjustment hole (13) on one side of the wooden support template (12) to make the outer pattern template (11) and the wooden support template (12) close together again; Rotate the pull rod (21) in the opposite direction to remove the adjustment device (2); Installing the blocking member (4) into the adjustment hole (13) from the outside to block the adjustment hole (13); pouring concrete into the formwork; After demoulding, the adjustment hole (13) is repaired.
Citation Information
Patent Citations
Wood grain fair-faced concrete formwork construction method
CN115492363A
Multi-angle template pull rod anchoring device
CN209780250U