Cast-in-place stair form assembly

Abstract

The utility model discloses a cast-in-place stair form assembly which comprises: a step form assembly, a step fixing mechanism and a construction joint assembly, the step form assembly comprises a step bottom die and two step side dies, the two step side dies are respectively arranged on the two sides of the top surface of the step bottom die, a plurality of clamping grooves are evenly arranged along the extension direction of the two step side dies, the step fixing mechanism comprises a step plate and a step reinforcing die frame, the step plate is inserted into the clamping grooves in cooperation and is fixedly connected with the step side dies, the step reinforcing die frame is fixedly connected with the step plate, the construction joint assembly comprises an oblique insertion plate, a movable baffle and a plurality of embedded bolts, a cleaning port is arranged on the step bottom die at the construction joint, a movable baffle is arranged on the top of the step bottom die at the cleaning port, and the oblique insertion plate is vertically arranged on the top of the step bottom die. The utility model can prevent the stair step form from settling and expanding, avoid geometric deviation of the step, has a reasonable construction joint form structure, is convenient to install, and can reduce the leakage of grouting of the stair construction joint reinforcement.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a cast-in-place staircase formwork assembly. Background Technology

[0002] In the construction of cast-in-place reinforced concrete stairs, traditional formwork systems have the following technical defects: Stair tread formwork relies solely on nails for fixing, making it prone to bulging and deformation under concrete lateral pressure, leading to deviations in tread geometry. This necessitates manual chiseling and repair later, increasing labor costs. Traditional construction joints use a post-installed plate method, requiring drilling and installing tie bolts after the concrete has initially set, which compromises structural integrity and increases the risk of grout leakage. Cleaning debris from the joint is difficult, weakening the bond strength between new and old concrete. Furthermore, the formwork joints at construction joints are complex, time-consuming to install, and prone to leaks due to inadequate sealing. Utility Model Content

[0003] The purpose of this utility model is to provide a cast-in-place stair formwork assembly that can prevent the stair tread formwork from settling and expanding, avoid geometric deviations in the treads, has a reasonable construction joint formwork structure, is easy to install, and can also reduce grout leakage during stair construction joint reinforcement.

[0004] To achieve the above and other related objectives, this utility model provides a cast-in-place staircase formwork assembly, comprising: a step formwork assembly, a step fixing mechanism, and a construction joint assembly. The step formwork assembly includes a bottom step mold and two side step molds. The bottom of the bottom step mold is fixedly connected to the floor slab via an inclined support assembly. The two side step molds are respectively disposed on both sides of the top surface of the bottom step mold. The two side step molds are evenly provided with a plurality of slots along their extension direction, and the slots are arranged vertically. The step fixing mechanism includes a plurality of step plates and a plurality of step reinforcing formwork frames. The two ends of the plurality of step plates respectively engage with the plurality of slots. Next, the two ends of several step plates are respectively fixedly connected to two step side molds, and several step reinforcement mold frames are fixedly installed on the upper side of the step bottom mold through a first bracket. Several step reinforcement mold frames are arranged along the extension direction of the step bottom mold and are respectively fixedly connected to several step plates. The construction joint assembly includes an inclined plate, a movable baffle and several pre-embedded bolts. The step bottom mold at the construction joint is provided with a cleaning port. The top of the step bottom mold at the cleaning port is provided with the movable baffle. The inclined plate is vertically arranged on the top of the step bottom mold and cooperates with the cleaning port. Several pre-embedded bolts cooperate with the inclined plate.

[0005] In one example of the cast-in-place stair formwork assembly of this utility model, the step plate includes a first timber, a second timber, a first template, and a second template. The first template and the second template are respectively fixedly installed on both sides of the first timber and the second timber. The top surface of the first timber mates with the top surfaces of the first template and the second template, and the bottom surface of the second timber mates with the bottom surfaces of the first template and the second template. A first screw is inserted between the first timber and the second timber. The two ends of the first screw are respectively inserted into the two step side molds. A washer is fitted on each end of the first screw and a reinforcing nut is threadedly connected to it.

[0006] In one example of the cast-in-place staircase formwork assembly of this utility model, the step reinforcement formwork frame includes an inclined steel pipe. The bottom of the inclined steel pipe is provided with a plurality of support frames along the extension direction of the inclined steel pipe. The plurality of support frames are respectively matched with a plurality of step plates. The inclined steel pipe is fixedly connected to the first bracket.

[0007] In one example of the cast-in-place staircase formwork assembly of this utility model, the support frame includes a first support plate and a second support plate. The top end of the first support plate is fixedly connected to the inclined steel pipe. An adjustable locking head is provided on each side of the top end of the first support plate. A plurality of round holes are provided on the top surface of the first timber. The adjustable locking head is inserted into the round holes. The bottom end of the first support plate is fixedly connected vertically to the second support plate. One end of the second support plate is fixedly connected to the inclined steel pipe. A plurality of slots are provided on the side wall of the step plate. The other end of the second support plate is inserted into the slots.

[0008] In one example of the cast-in-place staircase formwork assembly of this utility model, the width of the slot matches the thickness of the step plate, and the depth of the slot matches the height of the step plate.

[0009] In one example of the cast-in-place staircase formwork assembly of this utility model, the inclined support assembly includes several inclined support rods. One end of each inclined support rod is provided with an adjustable top support, and the other end of each inclined support rod is provided with a locking device. A force-transmitting anchor rod is fixedly installed on the locking device. The force-transmitting anchor rod is fixedly connected to the floor slab. The adjustable top support cooperates with the main timber beam at the bottom of the step formwork.

[0010] In one example of the cast-in-place staircase formwork assembly of this utility model, the bottom of the inclined insert plate is provided with several steel bar slots, and the several steel bar slots are connected to the staircase steel bar frame.

[0011] In one example of the cast-in-place staircase formwork assembly of this utility model, the width of the cleaning opening is 100-150mm, and the width of the movable baffle matches the cleaning opening.

[0012] In one example of the cast-in-place staircase formwork assembly of this utility model, the pre-embedded bolt includes a second screw rod, a circular piece is fixedly installed at the top of the second screw rod, the bottom end of the second screw rod passes through the bottom mold of the step, a conical nut is threadedly connected to the middle of the second screw rod, the conical nut is in contact with the top surface of the bottom mold of the step, and a crescent-shaped clip and a second nut are provided at the bottom end of the second screw rod, the crescent-shaped clip cooperates with the main timber at the bottom of the bottom mold of the step.

[0013] In one example of the cast-in-place staircase formwork assembly of this utility model, the distance between the pre-embedded bolt and the inclined plate is 30-50mm.

[0014] Compared with the prior art, the cast-in-place staircase formwork assembly of this utility model has the following beneficial effects: 1. The step plate of this utility model is engaged with the slot on the side mold of the step plate, which can prevent the step plate from horizontal displacement and settlement. The step reinforcement mold frame is connected to the first support as a whole. The step reinforcement mold frame is fixedly installed and connected to several step plates, which can provide active restraint force, offset the side pressure of concrete, and completely suppress the expansion of the step plate. 2. The first screw is installed on the step plate of this utility model. The two ends of the first screw are fitted with washers to increase the force-bearing area of ​​the step side mold and avoid local crushing. The two sides are reinforced with nuts that are symmetrically locked to fix the two ends of the step plate to the two step side molds respectively, thereby increasing the lateral deflection. 3. The inclined support rod in the inclined support assembly of this utility model has a certain angle, which decomposes the horizontal thrust of concrete into axial pressure and vertical force, and transmits it to the main structure through force transmission anchor rods implanted in the floor slab, thus avoiding horizontal displacement of the bottom formwork of the steps. 4. The inclined plate of the construction joint component of this utility model is placed vertically with the bottom formwork of the step, and a cleaning port is left on the bottom formwork of the step. At the same time, several pre-embedded bolts are set on the bottom formwork of the step at 30-50mm of the construction joint, so as to realize one-time formwork support, segmented pouring and zero-residue cleaning of the construction joint. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the cast-in-place staircase formwork assembly of this utility model; Figure 2 This is a partial structural schematic diagram of the step template assembly and step fixing mechanism in one embodiment of the cast-in-place stair formwork assembly of this utility model; Figure 3 This is a schematic diagram of the structure of the tread and the tread side mold in one embodiment of the cast-in-place stair formwork assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the step reinforcement formwork frame in one embodiment of the cast-in-place stair formwork assembly of this utility model; Figure 5This is a schematic diagram of the inclined support component in one embodiment of the cast-in-place staircase formwork assembly of this utility model; Figure 6 This is a schematic diagram of the construction joint component in one embodiment of the cast-in-place staircase formwork assembly of this utility model. Figure 1 ; Figure 7 This is a schematic diagram of the construction joint component in one embodiment of the cast-in-place staircase formwork assembly of this utility model. Figure 2 .

[0016] Component designation: 100 Step template assembly; 110 Step bottom mold; 111 Cleaning port; 120 Step side mold; 121 Slot; 200 Step fixing mechanism; 210 Step plate; 211 First timber; 212 Second timber; 213 First template; 214 Second template; 215 First screw; 216 Washer; 217 Reinforcing nut; 218 Round hole; 219 Slot; 220 Step reinforcing mold frame; 221 Inclined steel pipe; 222 First support plate; 223 ... 2. Support plate; 224. Adjustable locking head; 230. First bracket; 300. Construction joint assembly; 310. Inclined insert plate; 311. Rebar slot; 320. Movable baffle; 330. Embedded bolt; 331. Second screw; 332. Circular piece; 333. Conical nut; 334. Crescent clip; 335. Second nut; 400. Inclined support assembly; 410. Inclined support rod; 420. Adjustable top support; 430. Locking device; 440. Force transmission anchor; 500. Floor slab; 600. Rebar frame. Detailed Implementation

[0017] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0018] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0019] Please see Figures 1 to 7 This utility model provides a cast-in-place stair formwork assembly, which includes: a step formwork assembly 100, a step fixing mechanism 200, and a construction joint assembly 300. The step formwork assembly 100 includes a step bottom mold 110 and two step side molds 120. The bottom of the step bottom mold 110 is fixedly connected to the floor slab 500 through an inclined support assembly 400. The two step side molds 120 are respectively arranged on both sides of the top surface of the step bottom mold 110. The two step side molds 120 are evenly provided with a plurality of slots 121 along the extension direction of the step side molds 120, and the plurality of slots 121 are arranged in the vertical direction. The step fixing mechanism 200 includes a plurality of step plates 210 and a plurality of step reinforcing mold frames 220. The two ends of the plurality of step plates 210 are respectively engaged with the plurality of slots 121. The two ends of the plurality of step plates 210 are respectively fixedly connected to two step side molds 120. The plurality of step reinforcing mold frames 220 are fixedly installed on the upper side of the step bottom mold 110 through a first bracket 230. The plurality of step reinforcing mold frames 220 are arranged along the extension direction of the step bottom mold 110. The plurality of step reinforcing mold frames 220 are respectively fixedly connected to the plurality of step plates 210. The construction joint assembly 300 includes an inclined plate 310, a movable baffle 320, and a plurality of pre-embedded bolts 330. A cleaning port 111 is provided on the bottom formwork 110 at the construction joint. The movable baffle 320 is provided on the top of the bottom formwork 110 at the cleaning port 111. The inclined plate 310 is vertically arranged on the top of the bottom formwork 110 and cooperates with the cleaning port 111. The plurality of pre-embedded bolts 330 cooperate with the inclined plate 310.

[0020] The bottom formwork 110 of this invention is fixedly installed on the top of the floor slab 500 by the inclined support assembly 400. The step plate 210 is engaged with the slot 121 on the side formwork 120. The two ends of the step plate 210 are respectively fixedly connected to the two side formworks 120, so that the bottom formwork 110, the two side formworks 120 and the step plates 210 form a whole, which can prevent the formwork from shifting and settling. The step reinforcement formwork 220 is fixedly connected to the floor slab 500 by the first bracket 230. The step reinforcement formwork 220 is used to fix the step plates 210 and prevent the formwork from expanding. The construction joint assembly 300 can facilitate the pouring of the construction joint. The inclined insert plate 310 can complete the formwork support and segmented pouring at one time. The movable baffle 320 and the cleaning port 111 can facilitate the cleaning of the residue in the construction joint. The pre-embedded bolts 330 can avoid structural damage caused by subsequent drilling.

[0021] Please see Figures 1 to 7 In one example of the cast-in-place staircase formwork assembly of this utility model, the step plate 210 includes a first timber 211, a second timber 212, a first template 213, and a second template 214. The first template 213 and the second template 214 are respectively fixedly installed on both sides of the first timber 211 and the second timber 212. The top surface of the first timber 211 mates with the top surface of the first template 213 and the second template 214, and the bottom surface of the second timber 212 mates with the bottom surface of the first template 213 and the second template 214. A first screw 215 passes between the first timber 211 and the second timber 212. The two ends of the first screw 215 are respectively passed through the two step side molds 120. A washer 216 is sleeved on each end of the first screw 215, and a reinforcing nut 217 is threadedly connected to it. The step plate 210 can be fixedly connected to the two step side molds 120 using the first screw 215, the washer 216, and the reinforcing nut 217.

[0022] Please see Figures 1 to 7In one example of the cast-in-place staircase formwork assembly of this utility model, the step reinforcement formwork 220 includes an inclined steel pipe 221. The bottom of the inclined steel pipe 221 is provided with a plurality of support frames along the extension direction of the inclined steel pipe 221. The plurality of support frames are respectively matched with a plurality of step plates 210. The inclined steel pipe 221 is fixedly connected to the first bracket 230. The support frame includes a first support plate 222 and a second support plate 223. The top end of the first support plate 222 is fixedly connected to the inclined steel pipe 221. An adjustable locking head 224 is provided on each side of the top end of the first support plate 222. A plurality of round holes 218 are provided on the top surface of the first timber 211. The adjustable locking head 224 is inserted into the round holes 218. The bottom end of the first support plate 222 is vertically fixedly connected to the second support plate 223. One end of the second support plate 223 is fixedly connected to the inclined steel pipe 221. A plurality of slots 219 are provided on the side wall of the step plate 210. The other end of the second support plate 223 is inserted into the slots 219.

[0023] Please see Figures 1 to 7 In one example of the cast-in-place staircase formwork assembly of this utility model, the width of the slot 121 matches the thickness of the step plate 210, and the depth of the slot 121 matches the height of the step plate 210.

[0024] Please see Figures 1 to 7 In one example of the cast-in-place staircase formwork assembly of this utility model, the inclined support assembly 400 includes several inclined support rods 410. One end of each inclined support rod 410 is provided with an adjustable top support 420, and the other end is provided with a locking element 430. A force-transmitting anchor rod 440 is fixedly installed on the locking element 430. The force-transmitting anchor rod 440 is fixedly connected to the floor slab 500. The adjustable top support 420 cooperates with the main timber beam at the bottom of the step formwork 110. The inclined support rods 410 have a certain angle, which decomposes the horizontal thrust of the concrete into axial pressure and vertical force, and transmits it to the main structure through the force-transmitting anchor rod 440 embedded in the floor slab 500, thus preventing horizontal displacement of the step formwork 110.

[0025] Please see Figures 1 to 7In one example of the cast-in-place staircase formwork assembly of this utility model, the bottom of the inclined insert plate 310 is provided with a plurality of steel bar slots 311, which are inserted into the staircase steel bar frame 600. The width of the cleaning opening 111 is 100-150mm, and the width of the movable baffle 320 matches the cleaning opening 111. The pre-embedded bolt 330 includes a second screw 331, a circular piece 332 is fixedly installed at the top of the second screw 331, the bottom end of the second screw 331 passes through the bottom mold of the step 110, and a conical nut 333 is threadedly connected to the middle of the second screw 331. The conical nut 333 fits against the top surface of the bottom mold of the step 110. The bottom end of the second screw 331 is provided with a crescent-shaped clip 334 and a second nut 335. The crescent-shaped clip 334 cooperates with the main timber at the bottom of the bottom mold of the step 111. The distance between the pre-embedded bolt 330 and the inclined plate 310 is 30-50mm. The inclined plate 310, the pre-embedded bolt 330 and the cleaning port 111 are arranged in a spatially staggered manner, which can reduce grout leakage during the reinforcement of the stair construction joint.

[0026] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A cast-in-place staircase formwork assembly, characterized in that, include: A step template assembly, comprising a bottom step template and two side step templates, wherein the bottom of the bottom step template is fixedly connected to the floor slab via an inclined support assembly, and the two side step templates are respectively disposed on both sides of the top surface of the bottom step template, and the two side step templates are evenly provided with a plurality of slots along the extension direction, and the plurality of slots are arranged along the vertical direction; A step fixing mechanism includes a plurality of step plates and a plurality of step reinforcing mold frames. The two ends of the plurality of step plates are respectively engaged with a plurality of slots. The two ends of the plurality of step plates are respectively fixedly connected to two step side molds. The plurality of step reinforcing mold frames are fixedly installed on the upper side of the step bottom mold through a first bracket. The plurality of step reinforcing mold frames are arranged along the extension direction of the step bottom mold and are respectively fixedly connected to the plurality of step plates. The construction joint assembly includes an inclined plate, a movable baffle, and several pre-embedded bolts. A cleaning port is provided on the bottom formwork of the step at the construction joint. The movable baffle is provided on the top of the bottom formwork of the step at the cleaning port. The inclined plate is vertically arranged on the top of the bottom formwork of the step and cooperates with the cleaning port. Several pre-embedded bolts cooperate with the inclined plate.

2. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The step board includes a first wooden block, a second wooden block, a first template, and a second template. The first template and the second template are respectively fixedly installed on both sides of the first wooden block and the second wooden block. The top surface of the first wooden block mates with the top surfaces of the first template and the second template, and the bottom surface of the second wooden block mates with the bottom surfaces of the first template and the second template. A first screw rod passes through the first wooden block and the second wooden block. The two ends of the first screw rod are respectively passed through the two step side templates. A washer is fitted on each end of the first screw rod and a reinforcing nut is threadedly connected to it.

3. The cast-in-place staircase formwork assembly as described in claim 2, characterized in that, The step reinforcement formwork includes an inclined steel pipe. The bottom of the inclined steel pipe is provided with several support frames along the extension direction of the inclined steel pipe. The several support frames are respectively matched with several step plates. The inclined steel pipe is fixedly connected to the first bracket.

4. The cast-in-place staircase formwork assembly as described in claim 3, characterized in that, The support frame includes a first support plate and a second support plate. The top end of the first support plate is fixedly connected to the inclined steel pipe. An adjustable locking head is provided on each side of the top end of the first support plate. Several round holes are provided on the top surface of the first timber. The adjustable locking head is inserted into the round holes. The bottom end of the first support plate is fixedly connected vertically to the second support plate. One end of the second support plate is fixedly connected to the inclined steel pipe. Several slots are provided on the side wall of the step plate. The other end of the second support plate is inserted into the slots.

5. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The width of the slot matches the thickness of the step plate, and the depth of the slot matches the height of the step plate.

6. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The inclined support assembly includes several inclined support rods. One end of each inclined support rod is provided with an adjustable top support, and the other end of each inclined support rod is provided with a locking device. A force transmission anchor rod is fixedly installed on the locking device. The force transmission anchor rod is fixedly connected to the floor slab. The adjustable top support cooperates with the main beam timber at the bottom of the step formwork.

7. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The bottom of the inclined plate is provided with several steel bar slots, which are connected to the stair steel bar frame.

8. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The width of the cleaning port is 100-150mm, and the width of the movable baffle matches the width of the cleaning port.

9. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The pre-embedded bolt includes a second screw rod, with a circular plate fixedly installed at the top end of the second screw rod. The bottom end of the second screw rod passes through the bottom mold of the step. A conical nut is threadedly connected to the middle of the second screw rod. The conical nut fits against the top surface of the bottom mold of the step. A crescent-shaped clip and a second nut are provided at the bottom end of the second screw rod. The crescent-shaped clip cooperates with the main timber at the bottom of the bottom mold of the step.

10. The cast-in-place staircase formwork assembly as described in claim 1, characterized in that, The distance between the pre-embedded bolt and the inclined plate is 30-50mm.

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