Prefabricated composite slab steel bar hook centralizer

Abstract

This invention belongs to the field of building construction technology, specifically relating to a prefabricated composite slab rebar hook straightener, including a beam-type base with a groove on its surface. Several clamps are slidably installed on the surface of the groove. Each clamp includes a sliding seat and a first clamping plate and a second clamping plate arranged opposite each other. A positioning groove is provided on the top surface of the sliding seat. The first clamping plate and the second clamping plate are symmetrically arranged on both sides of the positioning groove, and at least one of the clamping plates is slidably connected to the sliding seat. This invention can improve production efficiency, facilitate turnover, be environmentally friendly, and reduce on-site construction time and manpower and material resources.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a prefabricated composite slab rebar hook straightener. Background Technology

[0002] In the fabrication of prefabricated composite slabs, to ensure effective anchorage between the bottom reinforcing bars and the subsequent concrete, and to improve the overall structural integrity, the hooks of the bottom reinforcing bars need to be precisely oriented upwards or maintained at the designed angle. In traditional construction processes, the straightening of the reinforcing bar hooks mainly relies on manual labor, which presents the following problems: 1. Insufficient precision: Manual alignment based on experience makes it difficult to uniformize the angle of the hooks, which can easily lead to problems such as insufficient anchorage length and uneven stress, affecting structural safety; 2. Inefficiency: It requires workers to straighten each individual rebar, which is time-consuming and labor-intensive. If skewed rebars are not corrected in time, it will directly affect the connection quality between the composite slab and the subsequent pouring layer. Summary of the Invention

[0003] The present invention aims to provide a rebar straightening device that can quickly, accurately, and in batches correct rebar hooks.

[0004] The technical solution adopted by the present invention to solve the aforementioned problem is as follows: A prefabricated composite slab rebar hook straightener includes a beam-type base with a groove on the surface of the beam-type base. Several clamps are slidably installed on the surface of the groove. Each clamp includes a slide seat and a first clamp plate and a second clamp plate arranged opposite to each other. A positioning groove is provided on the top surface of the slide seat. The first clamp plate and the second clamp plate are symmetrically arranged on both sides of the positioning groove, and at least one of the clamp plates is slidably connected to the slide seat.

[0005] Compared with the prior art, the present invention employing the above structure has the following advantages: This invention uses multiple identical clamps to straighten and fix the reinforcing bars of composite slabs, ensuring that the hooks of each reinforcing bar are bent upwards and at a uniform angle and height; it uses a beam-type linear base to ensure uniform length of reinforcing bars, ensuring the anchorage length and stress conditions on the side of the slab; and it achieves uniform straightening of the reinforcing bars of the slab by arranging multiple clamps simultaneously, thereby improving production efficiency, facilitating turnover, being environmentally friendly, and reducing on-site construction time and manpower and material resources.

[0006] As a preferred option, a further technical solution to the above structure is: The beam-type base has a convex cross-section with an internal cavity, and the sliding groove is located at the top center of the convex beam-type base. This structure reduces the overall weight while ensuring the strength of the base.

[0007] The slide includes a placement plate, a positioning groove on the surface of the placement plate, a slide rod fixed to the lower end of the placement plate, the lower end of the slide rod being disposed in the slide groove, and a clamping assembly for fixing to the beam base is also provided on the outside of the slide rod. The slide is used to assemble the clamps on the beam base, facilitating adjustment of the distribution of the clamps on the beam base and facilitating the movement of the clamps for spacing positioning.

[0008] The placement plate has strip-shaped adjustment holes on both sides perpendicular to the positioning groove. Bolts are fixed to the lower ends of the first and second clamping plates, and the bolts are installed in the adjustment holes to fix the first or second clamping plate to the placement plate. By loosening the bolts, the clamping plates can move along the adjustment holes. By tightening the bolts, the opening and closing distance between the two clamping plates can be adjusted to accommodate steel bars of different diameters, so as to achieve clamping and fixing of the steel bars by the clamp.

[0009] Shims are fixedly installed on the opposite sides of the first and second clamping plates. The shims are used to increase friction, prevent the reinforcing bars from slipping out of the clamps during the correction process, and avoid damage to the reinforcing bar hooks when they are inserted into the clamps. Attached Figure Description

[0010] Figure 1 This is a top-view structural diagram of the overall structure of the prefabricated composite slab rebar hook straightener of the present invention. Figure 2 This is a structural diagram of the beam-type base of the present invention; Figure 3 This is a side structural diagram of the prefabricated composite slab rebar hook straightener of the present invention; Figure 4 This is a diagram showing the installation structure of the single clamp of the present invention on a beam-type base; Figure 5 This is a schematic diagram of the structure of an embodiment of the slide block of the present invention; Figure 6 This is an exploded view of the structure of an embodiment of the slide block of the present invention; Figure 7 This is a structural diagram of the connection between the clamping plate and the placement plate of the present invention.

[0011] In the diagram: 1. Beam base; 101. Slide groove; 2. Clamp; 211. First clamping plate; 212. Second clamping plate; 213. Shim; 214. Bolt; 22. Slide block; 3. Placement plate; 31. Positioning groove; 32. Adjustment hole; 4. Slide rod; 5. Limiting plate; 6. Clamping plate; 7. Spring; 8. End plate. Detailed Implementation

[0012] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0013] See Figures 1 to 4The present invention provides a prefabricated composite slab rebar hook straightener, including a long strip beam-type base. The base adopts a convex cross section design and has a hollow internal structure, which ensures the overall rigidity and reduces the weight. A through groove is opened in the center of the top of the base along the length direction. It also includes several independent clamps, which are slidably installed on the slide groove. Each clamp consists of a slide base and a first clamping plate and a second clamping plate arranged opposite each other. The top surface of the slide base is provided with a positioning groove. The first clamping plate and the second clamping plate are symmetrically arranged on both sides of the positioning groove, and at least one of the clamping plates is slidably connected to the slide base.

[0014] Multiple clamps are arranged on the beam-type base according to the spacing and quantity of the reinforcing bars in the composite slab. The hook ends of the reinforcing bars extend into the clamps and are placed on the positioning grooves for stability. Then, the relative spacing between the first clamp and the second clamp is adjusted to straighten and fix the hook ends of the reinforcing bars. After all the reinforcing bars are straightened and fixed, the embedded ends of the reinforcing bars can be welded and the composite slab concrete can be poured.

[0015] The slide is used to facilitate the installation, position adjustment, and fixation of the clamp. Alternatively, the slide includes a placement plate with a positioning groove on its surface. A slide rod is fixed to the lower end of the placement plate, and the lower end of the slide rod is positioned within the groove. A clamping assembly for fixing the slide rod to the beam-type base is also provided externally. Further details can be found in the following sections. Figure 5 , Figure 6 The specific structure of the clamping assembly can be as follows: the clamping assembly includes a limiting plate fixedly sleeved on the surface of the slide rod, a clamping plate is provided on the lower side of the limiting plate, the clamping plate is spherical and arched and has a through hole in the center, the through hole is movably sleeved on the surface of the slide rod, an end plate is fixedly installed at the lower end of the slide rod, and a spring is provided between the end plate and the clamping plate.

[0016] The outer diameter of the slide rod is adapted to the slide groove and can be directly inserted from the end of the slide groove. The limiting plate is located outside the beam base and rests on the outer surface of the slide groove. The friction between the limiting plate and the beam base prevents the slide from moving inactively. The clamping plate abuts against the inner wall of the beam base using a spring. It is not only used to adapt to beam bases with different plate thicknesses, but the spring also allows the distance between the clamping plate and the limiting plate to be floating, allowing the slide to move along the slide groove. After the slide stops, there is a certain friction between the clamping plate and the beam base to further stabilize the slide.

[0017] The slide bar can be made of round steel bars, rectangular steel bars, or rectangular tubes. Rectangular slide bars prevent the clamp from rotating or shifting.

[0018] As an alternative, see Figure 7The placement plate has strip-shaped adjustment holes on both sides perpendicular to the positioning groove. Bolts are installed at the lower ends of the first and second clamping plates, and the bolts are installed in the adjustment holes to fix the first or second clamping plate to the placement plate. Loosening the bolts can adjust the relative distance between the two clamping plates, and tightening them locks the position of the two clamping plates. During use, only one clamping plate needs to be adjusted, saving operation time.

[0019] Furthermore, gaskets are fixedly provided on the opposite sides of the first clamping plate and the second clamping plate. The gaskets are made of sponge or rubber. The gaskets increase friction to prevent the reinforcing bars from getting stuck in the clamps during the correction process, and at the same time protect the surface coating of the reinforcing bar hooks from being damaged when they are inserted into the clamps.

[0020] The first and second clamping plates bend outwards at the ends of the composite plate to form a wide opening.

[0021] The beam-type base surface is marked with graduations to quantify the spacing between adjacent reinforcing bars; correspondingly, a positioning pointer is set at the end of the limiting plate away from the composite plate.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A prefabricated composite slab rebar hook straightener, characterized in that: It includes a beam-type base, the surface of which is provided with a sliding groove, and several clamps are slidably installed on the surface of the sliding groove; the clamps include a slide seat and a first clamping plate and a second clamping plate arranged opposite to each other, the top surface of the slide seat is provided with a positioning groove, the first clamping plate and the second clamping plate are symmetrically arranged on both sides of the positioning groove, and at least one of the clamping plates is slidably connected to the slide seat.

2. The prefabricated composite slab rebar hook straightener according to claim 1, characterized in that, The beam-type base has a convex cross-section and is hollow inside. The sliding groove is located at the top center of the convex beam-type base.

3. The prefabricated composite slab rebar hook straightener according to claim 1, characterized in that: The slide includes a placement plate, the positioning groove is provided on the surface of the placement plate, a slide rod is fixedly connected to the lower end of the placement plate, the lower end of the slide rod is provided in the slide groove, and a clamping component for fixing to the beam base is also provided outside the slide rod.

4. The prefabricated composite slab rebar hook straightener according to claim 3, characterized in that, The clamping assembly includes a limiting plate fixedly sleeved on the surface of the slide rod, a clamping plate provided on the lower side of the limiting plate, the clamping plate being spherical and having a through hole in the center, the through hole being movably fitted onto the surface of the slide rod, an end plate being fixedly installed at the lower end of the slide rod, and a spring being provided between the end plate and the clamping plate.

5. The prefabricated composite slab rebar hook straightener according to claim 3, characterized in that, The placement plate has strip-shaped adjustment holes on both sides perpendicular to the positioning groove. The lower ends of the first clamping plate and the second clamping plate are provided with bolts, which are installed in the adjustment holes to fix the first clamping plate or the second clamping plate to the placement plate.

6. The prefabricated composite slab rebar hook straightener according to claim 1, characterized in that, Gaskets are fixedly installed on the opposite sides of the first and second clamping plates.

7. The prefabricated composite slab rebar hook straightener according to claim 3, characterized in that, The slide bar is a rectangular tube, and it is in surface contact with the side wall of the slide groove.

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