A pre-tightening device and a pre-tightening fixing assembly for a building template

Abstract

This invention provides a pre-tightening device and a pre-tightening fixing assembly for building formwork. The pre-tightening fixing assembly includes a tie rod fastening device and the pre-tightening device. The tie rod is anchored by the engagement of the threaded bolt with the arc-shaped ratchet teeth, generating resistance. The tie rod can be quickly pre-tightened by operating a pressure wrench and a tension wrench in conjunction with a lifting plate and a bracket. The operation is simple and quick, can be performed by a single person, and greatly improves work efficiency. When used with the tie rod fastening device, it effectively controls dimensions, provides high clamping strength, has fewer parts, reduces processing steps, is reusable, inexpensive, and is environmentally friendly and economical.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering construction, in particular to a pre-tightening device and a pre-tightening fixing assembly for a building formwork. BACKGROUND

[0002] The construction industry is a pillar industry of the national economy. In recent years, China has vigorously advocated the development route of scale, green and intensification. The building formwork fastening device, as a fastening support component in building construction, has an extremely important significance and role for the research on the steel bar pre-tightener and the steel bar fixing buckle used on both sides of the formwork, and for the promotion and development of green building industrialization.

[0003] At present, the fastening device commonly used in formwork engineering is the use of a tensioning screw rod, which is locked on the formwork outside through a "W" buckle or a nut at both ends of the screw rod to fix the formwork. Such a device has defects such as difficulty in disassembly, inconvenience in operation, large material loss, easy damage to the formwork, and certain safety deficiencies. With the development of building equipment and related technologies, Chinese patent CN204326536U discloses a tensioning fastening device, which includes a base, a support, a hinge shaft, a limiting fixing rod, a toothed plate and a return spring. The device can lock and position the threaded steel bar well through its internal working principle. The threaded steel bar is the tensioning screw rod. When the fastening device is removed or the threaded steel bar is loosened, the toothed plate is knocked outward, so that the toothed engagement end is separated from the threaded steel bar, and the threaded steel bar or the fastening device can be recycled. However, the tensioning fastening device only has an anchoring effect on the threaded steel bar, and the threaded steel bar needs to be pulled out for fastening when the threaded steel bar is fastened. Therefore, there is a need for a pre-tightening device that can pre-tighten the threaded steel bar. SUMMARY

[0004] In view of the needs in the prior art, the present application provides a pre-tightening device and a pre-tightening fixing assembly for a building formwork.

[0005] A pre-tightening device for a building formwork, comprising a support, a strip-shaped lifting plate vertically moving installed in the support, a vertical gear rack provided on one side of the lifting plate, a gear wheel rotatably installed at the upper part of the support corresponding to the position of the gear rack, the gear wheel being engaged with the gear rack, and a tensioning wrench fixedly connected to the gear wheel; a vertical screw rod through hole is provided in the lifting plate, the screw rod through hole penetrating the lifting plate, a pressing wrench is provided on the other side of the lifting plate, the lower part of the pressing wrench being rotatably installed on the lifting plate and located on one side of the screw rod through hole, an arc-shaped ratchet is provided on the lower part of the pressing wrench along the rotation direction thereof, and one end of the arc-shaped ratchet gradually protrudes to the inside of the axis of the screw rod through hole.

[0006] The working principle of this invention is as follows: The tie rod is inserted into the screw through hole of the lifting plate, and the clamping wrench is turned. The arc-shaped ratchet on the clamping wrench clamps and engages the tie rod, thereby positioning the tie rod on the lifting plate. Then, the tensioning wrench is turned, causing the gear connected to the tensioning wrench to rotate. Under the meshing action, the gear drives the rack, i.e., the lifting plate, to rise, thereby pulling the tie rod and pre-tightening it.

[0007] Further: The bracket is a cylindrical structure open at both ends. The lifting plate is located in a groove provided within the cylindrical structure and slides within the groove. The gear is located within the cylindrical structure, and a rotating shaft is fixedly mounted on both end faces of the gear. The rotating shaft is rotatably mounted on the side wall of the cylindrical structure and extends out from the side wall. One end of the tightening wrench is fixedly connected to the outer end of the rotating shaft. A clearance groove is provided on the side wall of the cylindrical structure corresponding to the position of the tightening wrench, and the outer end of the tightening wrench is located outside the cylindrical structure. The gear is mounted on the side wall of the cylindrical structure via the rotating shaft, facilitating its engagement with the lifting plate and resulting in a compact and stable structure.

[0008] Furthermore, the tension wrench and the clamping wrench are located on opposite sides of the bracket, facilitating operation of the tension wrench and the clamping wrench with both hands respectively.

[0009] Furthermore, the arc-shaped ratchet of the clamping wrench is located near one end face of the lifting plate. The lower end of the clamping wrench is rotatably mounted on a second rotating shaft. Both ends of the second rotating shaft are fixedly connected to two parallel fixed plates, which are both fixedly connected to the end face of the lifting plate. This facilitates the sliding of the lifting plate in the groove and prevents interference with the fixed plates or the clamping wrench.

[0010] Further: A support leg is provided at the lower part of the bracket, and a receiving chamber is provided between the support legs, the receiving chamber communicating with the slide groove. When the present invention is used in conjunction with the tie-fastening device described in the background art, the support leg abuts against the base of the tie-fastening device, the middle and upper parts of the tie-fastening device are housed in the receiving chamber, and the tie rod passing through the tie-fastening device is correspondingly inserted into the lifting plate.

[0011] Furthermore, the tightening wrench has a Y-shaped structure, with the corresponding two ends of the Y-shaped structure fixed to the rotating shafts on the end faces of the gear. This structure is stable and easy to operate.

[0012] A pre-tightening fixing assembly for building templates, comprising a pair of tension fastening devices and the pre-tightening device, the pair of tension fastening devices comprises a second support fixed on a base, a second screw hole through the second support is arranged on the base and the second support, a toothed clamping plate is arranged on the second support at one side of the second screw hole, the middle part of the toothed clamping plate is rotatably arranged on the second support, a toothed engaging end is arranged on the inner end of the toothed clamping plate corresponding to the position of the second screw hole, a return spring is fixed on the second support corresponding to the position of the outer end of the toothed clamping plate, and one end of the return spring abuts against the outer end of the toothed clamping plate; the support abuts against the base, and the screw hole is communicated with the second screw hole.

[0013] Further, a fixed clamping groove is arranged on the base corresponding to the position of the support, and the support is clamped in the fixed clamping groove. The pre-tightening device can be quickly positioned.

[0014] Further, the base is a plate structure, and a circular arc chamfer is arranged at the corner of the plate structure. The corner of the base and the template are prevented from interacting to cause damage to the template.

[0015] The support, the lifting plate, the pressing wrench and the tensioning wrench of the present application are assembled as a whole, which is simple in structure, convenient in processing and manufacturing, and can be produced on a large scale and in batches. The on-site operation is convenient, the construction process is simple, the economic benefit is significant, and the development prospect is broad.

[0016] The present application utilizes the thread of the tension bolt to engage and clamp the arc-shaped ratchet and generate resistance, thereby anchoring the tension bolt, which is convenient and labor-saving to install and disassemble, and can be operated by one person.

[0017] The present application presses the base of the tension fastening device through the supporting leg, and the pre-tightening force generated in the operation process makes the tension bolt press the template, and cooperates with the anchoring of the tension fastening device, which is safe and reliable.

[0018] The present application can be used with the tension fastening device or alone, effectively controls the size, has high clamping strength, has fewer parts, reduces the processing link, can be repeatedly used, is low in cost, and is green and economical.

[0019] The present application widens the application and research field of template engineering in green building construction, greatly enriches the content of template engineering, and can provide support for the development and achievement transformation of the template engineering system in green building construction as a key component of the template engineering system.

[0020] The present application can quickly pre-tighten the tension bolt by operating the pressing wrench and the tensioning wrench, cooperating with the lifting plate and the support, which is simple and fast in operation, can be operated by one person, and greatly improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present application;

[0022] Figure 2 is an assembly structural schematic diagram of the lifting plate, the pressing wrench and the tensioning wrench in the present application;

[0023] Figure 3 is a structural schematic diagram of the tensioning fastening device described in the background art;

[0024] Figure 4 is a practical state structural schematic diagram of the present application in cooperation with the tensioning fastening device.

[0025] In the figure, 9 is a support, 10 is a pressing wrench, 11 is a tensioning wrench, 12 is a rack, 13 is a supporting leg, 14 is a clearance slot, 15 is an arc-shaped ratchet, 16 is a fixed plate, 17 is a screw rod through hole, 18 is a gear, 19 is a rotating shaft, 20 is a fixing bolt, 21 is a tensioning screw rod, 22 is a lifting plate, 1 is a base, 2 is a fixing hole, 3 is a toothed clamping plate, 4 is a second support, 41 is a second screw rod through hole, 5 is a return spring, 6 is a fixed clamping slot, 7 is a chamfer, and 8 is a toothed engagement end. DETAILED DESCRIPTION

[0026] The present application will be described in detail below with reference to the accompanying drawings. The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be interpreted as limiting the present application. The left, middle, right, upper, lower and other orientation terms in the examples of the present application are only relative concepts or are referenced to the normal use state of the product, and should not be considered as limiting.

[0027] A pre-tightening device for a building formwork, in combination with Figure 1 and Figure 2As shown, including the bracket 9, in the bracket 9 vertically moving installation has a strip-shaped lifting plate 22, one side of the lifting plate 22 is provided with a vertical rack 12, the upper part of the bracket 9 is rotatably installed with a gear 18 corresponding to the position of the rack 12, the gear 18 is engaged with the rack 12, and the gear 18 is fixedly connected with a tension wrench 11; A vertical screw hole 17 is provided in the lifting plate 22, the screw hole 17 penetrates the lifting plate 22, and a pressing wrench 10 is arranged on the other side of the lifting plate 22, the lower part of the pressing wrench 10 is rotatably installed on the lifting plate 22 and located on one side of the screw hole 17, and the lower part of the pressing wrench 10 is provided with an arc-shaped ratchet 15 in the rotation direction, and one end of the arc-shaped ratchet 15 gradually protrudes into the axis of the screw hole 17.

[0028] Wherein, the bracket 9 is a cylindrical structure with two open ends, the lifting plate 22 is located in the sliding groove provided in the cylindrical structure and is in sliding fit with the sliding groove, the sliding groove is surrounded by the side wall of the cylindrical structure, the gear 18 is located in the cylindrical structure, the shaft 19 is fixedly arranged on the both end faces of the gear 18, the shaft 19 is rotatably installed on the side wall of the cylindrical structure and penetrates out of the side wall of the cylindrical structure, and one end of the tension wrench 11 is fixedly connected to the outer end of the shaft 19; A recess 14 is formed in the side wall of the cylindrical structure corresponding to the position of the pressing wrench 10, and the outer end of the pressing wrench 10 is located outside the cylindrical structure. The tension wrench 11 and the pressing wrench 10 are respectively located on the opposite sides of the bracket 9.

[0029] The arc-shaped ratchet 15 of the pressing wrench 10 is located at and close to one end face of the lifting plate 22, the lower end of the pressing wrench 10 is rotatably installed on a second shaft, the both ends of the second shaft are respectively fixedly connected to two fixed plates 16 arranged side by side, and the fixed plates 16 are fixedly connected to the end face of the lifting plate 22.

[0030] In addition, a supporting leg 13 is arranged on the lower part of the bracket 9, and a containing chamber is arranged between the supporting legs 13, and the containing chamber is communicated with the sliding groove. The tension wrench 11 is a Y-shaped structure, and the corresponding two ends of the Y-shaped structure are respectively fixed on the shafts 19 on the both end faces of the gear 18.

[0031] The working principle of the present application is that the tension screw is inserted into the screw hole of the lifting plate, and the pressing wrench is pulled, the arc-shaped ratchet on the pressing wrench is used to abut and clamp the tension screw, so as to position the tension screw on the lifting plate; then the tension wrench is pulled, the gear connected with the tension wrench is rotated, under the meshing effect, the gear drives the rack, that is, the lifting plate is lifted, so as to pull the tension screw, and the tension screw is pre-tightened.

[0032] A pre-tightening fixing assembly for building formwork, comprising Figure 3 and Figure 4 As shown in the drawings, the pre-tightening device comprises a pair of tightening fixing devices and the pre-tightening device, the second bracket 4 of the pair of tightening fixing devices is fixed on the base 1, a second screw hole 41 is formed through the base 1 and the second bracket 4, a toothed clamping plate 3 is arranged on the second bracket 4 at a side of the second screw hole 41, the middle part of the toothed clamping plate 3 is rotatably arranged on the second bracket 4, a toothed engaging end 8 is arranged on the inner end of the toothed clamping plate 3 corresponding to the position of the second screw hole 41, a return spring 5 is fixed on the second bracket 4 corresponding to the position of the outer end of the toothed clamping plate 3, one end of the return spring 5 abuts against the outer end of the toothed clamping plate 3; the bracket 9 abuts against the base 1, and the screw hole 17 is communicated with the second screw hole 41. A fixed clamping groove 6 is arranged on the base 1 corresponding to the position of the bracket 9, and the bracket 9 is clamped in the fixed clamping groove 6. The base 1 is a plate structure, and a circular arc chamfer 7 is arranged at the corner of the plate structure.

[0033] When the pre-tightening device is used in combination with the pair of tightening fixing devices, the pre-tightening device is combined with Figure 3 and Figure 4 The pair of tightening screw rods 21 are passed through the second bracket 4 of the pair of tightening fixing devices and the lifting plate 22 of the present application, the four supporting legs 13 of the present application are arranged on the base of the pair of tightening fixing devices and positioned on the fixed clamping groove 6, the base 1 with the pair of tightening screw rods 21 clamped thereon is used as a supporting panel, then the pressing wrench 10 is rotated and the pair of tightening screw rods 21 are first pressed by the arc-shaped ratchet 15, so that the pair of tightening screw rods 21 are clamped in the screw hole 17 of the lifting plate, then the tightening wrench 11 is pulled and the lifting plate 22 is tightened to the pair of tightening screw rods 21 through the meshing of the gear 18 and the rack 12. Then, the pressing wrench 10 and the tightening wrench 11 are loosened in sequence, the lifting plate 22 of the present application is reset, and the resistance generated by the toothed engaging end of the pair of tightening fixing devices clamps the pair of tightening screw rods to prevent backsliding. The above operations are repeated, and the pair of tightening screw rods 21 are gradually pre-tightened through the pressing wrench 10 and the tightening wrench 11 of the present application and the cooperation of the lifting plate 22.

[0034] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pre-tightening and fixing assembly for building formwork, characterized in that: The device includes a pre-tightening device and a tensioning device. The pre-tightening device includes a bracket, in which a strip-shaped lifting plate is vertically movably mounted. A vertical rack is provided on one side of the lifting plate. A gear is rotatably mounted on the upper part of the bracket corresponding to the rack. The gear meshes with the rack. A tensioning wrench is fixedly connected to the gear. A vertical screw through hole is provided in the lifting plate, penetrating the lifting plate. A clamping wrench is provided on the other side of the lifting plate. The lower part of the clamping wrench is rotatably mounted on the lifting plate and located on one side of the screw through hole. An arc-shaped ratchet is provided on the lower part of the clamping wrench along its rotation direction. One end of the arc-shaped ratchet gradually protrudes into the axis of the screw through hole. The tensioning device includes a second bracket fixedly mounted on a base. A second threaded hole is provided through both the base and the second bracket. A toothed clamping plate is provided on one side of the threaded hole on the second bracket. The middle portion of the toothed clamping plate is rotatably mounted on the bracket. A toothed engagement end is provided at the inner end of the toothed clamping plate corresponding to the position of the second threaded hole. A return spring is fixedly mounted on the bracket at the position corresponding to the outer end of the toothed clamping plate, with one end of the return spring abutting against the outer end of the toothed clamping plate. The bracket abuts against the base plate, and the threaded hole communicates with the second threaded hole.

2. The pre-tightening and fixing assembly for building formwork according to claim 1, characterized in that: The bracket is a cylindrical structure with openings at both ends. The lifting plate is located in a groove provided inside the cylindrical structure and slides in cooperation with the groove. The gear is located inside the cylindrical structure. A rotating shaft is fixedly provided on both end faces of the gear. The rotating shaft is rotatably mounted on the side wall of the cylindrical structure and extends out from the side wall of the cylindrical structure. One end of the tightening wrench is fixedly connected to the outer end of the rotating shaft. A clearance groove is provided on the side wall of the cylindrical structure corresponding to the position of the tightening wrench. The outer end of the tightening wrench is located outside the cylindrical structure.

3. A pre-tightening and fixing assembly for building formwork according to claim 1, characterized in that: The tension wrench and the compression wrench are located on opposite sides of the bracket.

4. A pre-tightening and fixing assembly for building formwork according to claim 1, characterized in that: The curved ratchet of the clamping wrench is located near the end face of the lifting plate. The lower end of the clamping wrench is rotatably mounted on the second rotating shaft. The two ends of the second rotating shaft are respectively fixedly connected to two parallel fixed plates. The fixed plates are both fixedly connected to the end face of the lifting plate.

5. A pre-tightening and fixing assembly for building formwork according to claim 2, characterized in that: The support is provided with legs at the lower part, and a receiving chamber is provided between the legs, the receiving chamber communicating with the slide groove.

6. A pre-tightening and fixing assembly for building formwork according to claim 2, characterized in that: The tightening wrench has a Y-shaped structure, and the corresponding two ends of the Y-shaped structure are respectively fixed on the rotating shafts on the end faces of the gear.

7. A pre-tightening and fixing assembly for building formwork according to claim 1, characterized in that: A fixing slot is provided on the base corresponding to the position of the bracket, and the bracket is snapped into the fixing slot.

8. A pre-tightening and fixing assembly for building formwork according to claim 1, characterized in that: The base is a plate-shaped structure, and rounded chamfers are provided at the corners of the plate-shaped structure.

Images