Cast-in-place pile head steel bar bending and straightening tool

Abstract

The utility model discloses a cast-in-place pile head steel bar bending and straightening tool which comprises a pinch bar structure, and a straightening mechanism is installed at the end of the pinch bar structure. The straightening mechanism comprises a support installed on the pry bar structure, a plurality of pry wheels arranged in a rotating connection mode are installed on the support, in the straightening process of the bent portion of the pile head steel bar, the bent portion stretches into the space between the pry wheels, and the pry bar structure pries and straightens the bent portion with the pry wheels as fulcrums. The support is installed on the pry bar structure through the angle adjusting structure, and the postures of the pry wheels are adjusted through the angle adjusting structure. The utility model provides a straightening tool which is higher in flexibility and more labor-saving, and the working efficiency of straightening the pile head reinforcing steel bar is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of pile head reinforcement bending and straightening, and particularly relates to a tool for straightening the bending of pile head reinforcement in cast-in-place piles. Background Technology

[0002] In engineering construction, a large number of cast-in-place piles are required. In these pile constructions, a reinforcing cage is placed into a pre-fabricated pile structure, and then concrete is poured to form the cast-in-place pile. During construction, the reinforcing steel bars at the pile head are exposed above ground level on the outside.

[0003] During construction, the reinforcing bars at the pile head are prone to bending. For example, during concrete pouring, the reinforcing cage is easily floated due to the buoyancy of the concrete slurry. To prevent the reinforcing cage from floating, the upper end of the reinforcing cage is often pressed down. This results in the upper end of the reinforcing cage (pile head reinforcing bars) exposed on the ground bending after the concrete is poured.

[0004] After bending, the reinforcement needs to be straightened to facilitate subsequent construction. However, because the pile head reinforcement has a certain diameter, bending it during straightening is quite laborious. The current method on the construction site is to use a tie plate that runs through the pile head reinforcement. The tie plate is connected to a steel cable, which is then attached to the bucket of a loader. When the loader raises the bucket, the tie plate is stopped at the bend, thus generating an upward pulling force on the bend to straighten it.

[0005] However, this method has the drawback of requiring equipment with large lifting capacity, such as forklifts, making it impractical. Therefore, manual alignment is still the preferred method in actual work.

[0006] Manual straightening mainly utilizes hydraulic straightening machines, which are very heavy, and operators simply do not have the arm strength to lift them for long periods of time, especially when bending at a slightly greater height, making it difficult to maintain good arm strength for extended periods.

[0007] Therefore, in actual work, hydraulic straightening machines are cumbersome, difficult to operate, and lack flexibility, resulting in low straightening efficiency, especially for sections with slightly larger pile head reinforcement and higher bends, where it is impossible to operate at such a high position for an extended period of time.

[0008] Therefore, using a flexible, convenient, and practical straightening tool for straightening the reinforcing bars at the pile heads of cast-in-place piles in complex construction sites has high practical value. Utility Model Content

[0009] Based on the above background, the purpose of this utility model is to provide a tool for straightening the bent reinforcing bars at the pile head of a cast-in-place pile.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A tool for straightening bent reinforcing bars at the head of a cast-in-place pile includes a pry bar structure, with a straightening mechanism installed at the end of the pry bar structure.

[0012] The straightening mechanism includes a bracket installed on the pry bar structure. Several pry wheels with rotating connections are installed on the bracket. During the straightening process of the bent part of the pile head steel bar, the bent part extends into the gap between the pry wheels, and the pry bar structure is pried and straightened using the pry wheels as fulcrums.

[0013] The bracket is mounted on the pry bar structure via an angle adjustment mechanism, which is used to adjust the pry bar posture.

[0014] Preferably, the pry bar structure includes a pry bar, the end of which is detachably fitted with a connector, and the connector is detachably fitted with an mounting rod;

[0015] The mounting rod is vertically mounted with a fixed shaft, and straightening mechanisms are installed at both ends of the fixed shaft via angle adjustment structures.

[0016] Preferably, a pair of pry wheels spaced vertically apart are installed on the bracket;

[0017] A limiting gap is formed between the prying wheels to allow the reinforcing steel bar at the pile head to pass through. After the reinforcing steel bar passes through the limiting gap, the prying wheels roll against and against the reinforcing steel bar.

[0018] Preferably, the center portion of the pry wheel has an inwardly recessed notch integrally formed;

[0019] A limiting gap is formed between the notches.

[0020] Preferably, the bracket is equipped with a rotating rod that rotatably connects to the pry wheel, and the outer end of the rotating rod is threadedly connected to an anti-detachment cap for the anti-detachment pry wheel;

[0021] The inner side of the rotating rod is fixedly connected to the partition seat of the partition pry wheel.

[0022] Preferably, the angle adjustment structure includes a pin rod fixedly connected to the bracket;

[0023] The end of the fixed shaft is fixedly connected to a bushing of a rotatable connecting pin.

[0024] A locking pin is slidably connected to the bushing, and the pin shaft has several pin holes that cooperate with the locking pin.

[0025] The locking pin passes through the pin hole and through the bottom of the bushing, and the lower end of the locking pin is threaded with an anti-loosening nut.

[0026] Preferably, pry bars are installed at both ends of the mounting rod.

[0027] Preferably, the longitudinal cross-sectional shape of the bracket is a triangular frame.

[0028] Preferably, the longitudinal cross-sectional shape of the bracket is a rectangular frame.

[0029] The height spacing between the pry bars is adjusted by a spacing adjustment structure.

[0030] Preferably, the spacing adjustment structure includes a plurality of adjusting screws that are vertically fixedly connected within the bracket;

[0031] The bracket has a rectangular sliding opening, and the rotating rod passes through the rectangular sliding opening.

[0032] The rotating rod is slidably connected to the adjusting screw;

[0033] The upper and lower ends of the adjusting screw are respectively threaded with positioning nuts for pressing down the upper rotating rod and pushing up the lower rotating rod.

[0034] This utility model has the following beneficial effects:

[0035] 1. This utility model provides a highly convenient and easy-to-operate rebar bending and straightening device. During operation, the operator uses the large torque of the pry bar to straighten the rebar in a relatively labor-saving manner. It is easy to operate and highly flexible. During the straightening process, the rebar is not easily loosened when it is stuck between the dumbbell-shaped pry wheels, thus ensuring high straightening stability.

[0036] 2. During the work process, insert the pile head reinforcement through the gap between the upper and lower pry wheels until it reaches near the bend. For example... Figure 1 As shown, the operator is now prying the pile head reinforcement upwards. At this time, the pile head reinforcement is being straightened by using the upper and lower pry wheels as fulcrums.

[0037] Because the pry bar has a certain length, it has a large torque, making it easier to straighten the bar (in actual work, you only need to straighten the bent part until it is close to being completely straight, and if it cannot be completely straightened, it will meet the needs of subsequent construction).

[0038] 3. The angle of the pry wheel and support can be adjusted according to the bending posture of the steel bar, so that the operator can maintain the best posture (that is, the posture of the pry wheel and support can match the bending shape of the steel bar) and make it easy to straighten the steel bar in the easiest operating posture.

[0039] 4. To deal with complex pile foundation reinforcement, the spacing of the pry wheels can be adjusted to straighten reinforcement bars of different thicknesses.

[0040] 5. Operation is labor-saving and simple. Compared with traditional straightening equipment such as hydraulic straightening equipment, its overall weight is much lower, making it more flexible and mobile. During the straightening process, the rotating connection of the pry wheel allows it to roll on the rebar to move the fulcrum position, facilitating thorough straightening of the rebar. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of the straightening tool for the pile head reinforcement of the cast-in-place pile in this embodiment of the present invention.

[0043] Figure 2 This is a schematic diagram of the bracket and pry wheel structure in an embodiment of this utility model;

[0044] Figure 3 This is a schematic diagram of the structure using double-sided pry bars in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the spacing adjustment structure in an embodiment of the present invention;

[0046] Figure 5 This is an embodiment of the present utility model. Figure 1 A schematic diagram of the planar structure in the diagram;

[0047] Figure 6 This is an embodiment of the present utility model. Figure 1 A structural diagram from another perspective.

[0048] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0052] Example 1

[0053] like Figure 1-6 As shown, a tool for straightening bent reinforcing bars at the head of a cast-in-place pile includes a pry bar structure, with a straightening mechanism installed at the end of the pry bar structure.

[0054] Specifically, the pry bar structure includes a pry bar 3, with a handle 31 mounted at the tail end of the pry bar 3. A straightening mechanism 1 is mounted at the end (left end) of the pry bar 3.

[0055] Specifically, a pair of straightening mechanisms 1, arranged front and rear, are installed on the left end of the pry bar 3.

[0056] The specific structure of the straightening mechanism 1 is as follows:

[0057] The straightening mechanism 1 includes a bracket 11 (the longitudinal cross-section of the bracket 11 is triangular) installed on the pry bar 3 structure. A pair of pry wheels (specifically, an upper pry wheel 12 and a lower pry wheel 13) are installed on the bracket 11 and are rotatably connected and spaced apart. During the straightening process of the bent part of the pile head steel bar, the bent part extends into the gap between the pry wheels, and the pry bar 3 structure is pried and straightened using the pry wheels as fulcrums.

[0058] Specifically, a limiting gap A is formed between the pry wheels to allow the reinforcing bar at the pile head to pass through. After the reinforcing bar passes through the limiting gap A, the pry wheels roll against and against the reinforcing bar. In particular, the center of the pry wheel has an integrally formed inward recess; the limiting gap A is formed between the recesses.

[0059] The limiting gap A is formed by the shapes of the upper pry wheel 12 and the lower pry wheel 13. Specifically, the upper pry wheel 12 and the lower pry wheel 13 are dumbbell-shaped.

[0060] Each bracket 11 is mounted on the pry bar 3 structure via an angle adjustment mechanism, which adjusts the pry bar posture.

[0061] Specifically, the end of the pry bar 3 is detachably fitted with a connector 32 (both ends of the connector 32 have threaded grooves), and the connector 32 is detachably fitted with an mounting rod 31. Specifically, the mounting rod 31 is threaded to the left end of the connector (the pry bar 3 is threaded to the right end of the connector). The transverse cross-sectional shape of the connector 32 is T-shaped, and it is a double-threaded connector.

[0062] Meanwhile, a fixed shaft 2 is vertically mounted on the mounting rod 31, and straightening mechanisms 1 are respectively installed at both ends of the fixed shaft 2 through an angle adjustment structure. Specifically, the mounting rod 31 is slidably connected to the center of the fixed shaft 2, and nuts positioned on both sides of the fixed shaft 2 are threadedly connected to both sides of the mounting rod 31.

[0063] Loosening the nut at the outer end allows the mounting rod 31 to be removed.

[0064] During the work, the pile head reinforcement is inserted through the gap between the upper pry wheel 12 and the lower pry wheel 13 until it reaches near the bend. For example... Figure 1 As shown, the operator is now prying the pile head reinforcement upwards. At this time, the pile head reinforcement is being straightened by using the upper pry wheel 12 and the lower pry wheel 13 as fulcrums.

[0065] Because the pry bar 3 has a certain length, its torque is relatively large, making it easier to straighten during the operation (in actual work, it is only necessary to straighten the bent parts until they are almost completely straight, and if they cannot be completely straightened, it will meet the needs of subsequent construction).

[0066] The aforementioned bracket 11 is equipped with a rotating rod 14 that rotatably connects to a pry wheel. The outer end of the rotating rod 14 is threadedly connected to an anti-detachment cap for the anti-detachment pry wheel. The inner side of the rotating rod 14 is fixedly connected to a spacer seat 141 that blocks the pry wheel (during the installation of the upper pry wheel 12 and the lower pry wheel 13, the central shaft cavity on the upper pry wheel 12 and the lower pry wheel 13 is aligned with the rotating rod 14 until it is pushed close to the spacer seat, and then the anti-detachment cap 142 is threadedly connected to the outer end of the rotating rod 14). The anti-detachment cap 142 is a nut.

[0067] Example 2

[0068] like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 1, in actual operation, since the bending posture of the steel bar is often random, in order to facilitate the alignment of the steel bar with the limiting gap A between the upper pry wheel 12 and the lower pry wheel 13, the posture of the bracket 11 is adjusted. After adjustment, the posture of the upper pry wheel 12 and the lower pry wheel 13 is adjusted to facilitate alignment with the steel bar.

[0069] Specifically, the angle adjustment structure includes a pin 112 fixedly connected to the bracket 11; and bushings 21 of the rotatable connecting pin 112 are fixedly connected to the front and rear ends of the fixed shaft 2.

[0070] A locking pin 211 is slidably connected to the bushing 21. The pin shaft 112 has several pin holes 1121 (circumferentially distributed) that cooperate with the locking pin 211. The locking pin 211 passes through the pin holes 1121 and passes through the bottom of the bushing 21. The lower end of the locking pin 211 is threaded with an anti-loosening nut.

[0071] During the angle adjustment process, unscrew the anti-loosening nut at the lower end of the locking pin 211 (the lower end of the locking pin 211 has a threaded structure, and the rest of the part is a smooth structure). After pulling out the locking pin 211, rotate the bracket 11 to adjust the angle until the pin hole 1121 coincides with the through hole on the bushing 21. Then, insert the locking pin 211 again and screw on the anti-loosening nut for positioning.

[0072] In actual work, to improve operational efficiency, selective operations are performed based on the bending method of the reinforcing bars. For example, reinforcing bars bent at 90 degrees or approximately 90 degrees are straightened in one go. Then, after adjusting the position of support 11, reinforcing bars with bending angles greater than 90 degrees are straightened. This method improves operational efficiency.

[0073] The posture adjustment is designed to make it easier to pry open the lever 3 for convenient operation.

[0074] Example 3

[0075] like Figure 1-6 As shown, this embodiment is based on the structure of embodiment 2. During operation, the reinforcing bar passes through the space between the upper pry wheel 12 and the lower pry wheel 13. Therefore, the positions of the upper pry wheel 12 and the lower pry wheel 13 on the bracket 11 are fixed according to the type (diameter) of the reinforcing bar. The reinforcing bars in pile foundations are often very hard. For reinforcing bars with a slightly larger diameter, the bent parts are straightened during the straightening process, while the remaining parts are not easily bent.

[0076] Specifically, the height of the limiting gap A between the upper pry wheel 12 and the lower pry wheel 13 is slightly larger than the diameter of the reinforcing bar. This ensures that the reinforcing bar can be stably clamped after it is inserted into the upper pry wheel 12 and the lower pry wheel 13.

[0077] In actual operation, the steel bars used in cast-in-place piles are often a few medium-sized (thickness) steel bars. Therefore, in this embodiment, the distance between the two upper pry wheels 12 and the lower pry wheel 13 on the rear support 11 is H1, and the distance between the two upper pry wheels 12 and the lower pry wheel 13 on the front support 11 is H2. H1 and H2 are designed to match the two mainstream steel bar diameters. That is, H2 is greater than H1. When straightening thicker steel bars, the two upper pry wheels 12 and the lower pry wheel 13 on the front support 11 are selected. Conversely, the two upper pry wheels 12 and the lower pry wheel 13 on the rear support 11 are selected.

[0078] In the above method, the rotating rod 14 is fixedly installed on the bracket 11.

[0079] Example 4

[0080] like Figure 1-6 As shown, this embodiment is a variation of the above embodiment. The triangular frame-shaped bracket 11 is replaced with a rectangular frame-shaped bracket 11.

[0081] In order to meet more complex work needs (i.e., to be able to adjust and straighten steel bars of various types and thicknesses), the upper pry wheel 12 and the lower pry wheel 13 are designed to be movable and adjustable in spacing.

[0082] Specifically, the height spacing between the pry bars is adjusted by a spacing adjustment structure. The spacing adjustment structure includes a pair of adjusting screws 5 vertically fixedly connected in the bracket 11; a rectangular sliding opening 111 is provided on the bracket 11, and a rotating rod 14 passes through the rectangular sliding opening 111; the rotating rod 14 is slidably connected to the adjusting screws 5; the upper and lower ends of the adjusting screws 5 are respectively threaded with positioning nuts 51 for pressing down the upper rotating rod 14 and pushing up the lower rotating rod 14.

[0083] During the operation, the upper pry wheel 12 and the lower pry wheel 13 are pre-moved to increase the spacing. Then, the steel bar is inserted between the upper pry wheel 12 and the lower pry wheel 13. Then, the positioning nuts 51 in the upper and lower positions are turned closer to each other until the upper pry wheel 12 and the lower pry wheel 13 are relatively stably clamped on the steel bar (leaving a certain space, not fully squeezing the steel bar).

[0084] Then push the lever 3, at which point the upper lever 12 and the lower lever 13 move to the area near the bent part of the steel bar for operation.

[0085] The above method enables operation on various types of reinforcing bars during the work process.

[0086] Example 5

[0087] like Figure 1-6 As shown, in actual work, since the bending of the steel bar may be in multiple places, it can be straightened gradually from the outside to the inside during the operation.

[0088] In actual operation, to facilitate easier operation, the pry bar 3 can be designed as an adjustable telescopic rod (not shown in the figure). That is, a telescopic rod disclosed in existing technology can be used as the pry bar 3, thus achieving convenient operation.

[0089] The pry wheel design is not only convenient to operate, but also superior because during the straightening process, the pry wheel can be pushed to roll on the rebar. After straightening adjustment, the fulcrum position can be adjusted by pushing the pry wheel to roll again, facilitating further straightening operations.

[0090] In actual operation, an additional pry bar 4 can also be installed on the other side of the mounting rod 31. This allows one operator to push down the pry bar 3 on one side while the other operator presses down the additional pry bar 4, thus coordinating the operation.

[0091] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A reinforcement bending and straightening tool for a pile head of a cast-in-place pile, characterized by, Includes a pry bar structure, the end of which is equipped with a straightening mechanism; The straightening mechanism includes a bracket installed on the pry bar structure. Several pry wheels with rotating connections are installed on the bracket. During the straightening process of the bent part of the pile head steel bar, the bent part extends into the gap between the pry wheels, and the pry bar structure is pried and straightened using the pry wheels as fulcrums. The bracket is mounted on the pry bar structure via an angle adjustment mechanism, which adjusts the pry bar posture.

2. The reinforcement bending and straightening tool for pile head of a cast-in-place pile according to claim 1, characterized in that, The pry bar structure includes a pry bar, the end of which is detachably fitted with a connector, and the connector is detachably fitted with an mounting rod. The mounting rod is vertically mounted with a fixed shaft, and straightening mechanisms are installed at both ends of the fixed shaft via angle adjustment structures.

3. A bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 2, characterized in that, The bracket is equipped with a pair of pry wheels spaced apart vertically. A limiting gap is formed between the prying wheels to allow the reinforcing steel bar at the pile head to pass through. After the reinforcing steel bar passes through the limiting gap, the prying wheels roll against and against the reinforcing steel bar.

4. A bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 3, characterized in that, The center part of the pry bar has an integrally formed inward recess. A limiting gap is formed between the notches.

5. A bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 4, characterized in that, The bracket is equipped with a rotating rod that is rotatably connected to a pry wheel, and the outer end of the rotating rod is threadedly connected to an anti-detachment cap for the anti-detachment pry wheel; The inner side of the rotating rod is fixedly connected to the partition seat of the partition pry wheel.

6. A bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 5, characterized in that, The angle adjustment structure includes a pin rod fixedly connected to the bracket; The end of the fixed shaft is fixedly connected to a bushing of a rotatable connecting pin. A locking pin is slidably connected to the bushing, and the pin shaft has several pin holes that cooperate with the locking pin. The locking pin passes through the pin hole and through the bottom of the bushing, and the lower end of the locking pin is threaded with an anti-loosening nut.

7. The tool for straightening bent reinforcing bars at the head of cast-in-place piles according to claim 6, characterized in that, Pry bars are installed at both ends of the mounting rod.

8. The bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 6, characterized in that, The longitudinal cross-sectional shape of the bracket is a triangular frame.

9. The bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 6, characterized in that, The longitudinal cross-sectional shape of the bracket is a rectangular frame. The height spacing between the pry bars is adjusted by a spacing adjustment structure.

10. A bend straightening tool for pile head reinforcement of a cast-in-place pile according to claim 9, characterized in that, The spacing adjustment structure includes several vertically fixed adjustment screws connected within the bracket; The bracket has a rectangular sliding opening, and the rotating rod passes through the rectangular sliding opening. The rotating rod is slidably connected to the adjusting screw; The upper and lower ends of the adjusting screw are respectively threaded with positioning nuts for pressing down the upper rotating rod and pushing up the lower rotating rod.

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