Bending device for small-diameter steel bar

Abstract

The utility model discloses a bending device for a small-diameter steel bar. The bending device comprises an arc wall, an embedding groove and a fixing rod. The arc wall is of a stretching wall structure with the longitudinal section in a semicircular arc shape, a fixing rod is fixed to one side of the arc wall, the axis of the fixing rod is perpendicular to the arc axis of the arc wall, and a through open groove is formed in the side, away from the fixing rod, of the arc wall to form an embedded groove. The stirrup bending device has the advantages that stirrups can be conveniently bent; and the force arm for bending the reinforcing steel bar can be adaptively adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar bending, in particular to a bending device for small-diameter steel bars. Background Art

[0002] The beam reinforcement frame is composed of longitudinal reinforcement, transverse reinforcement and stirrups. The longitudinal reinforcement and transverse reinforcement form a strip-shaped reinforcement frame structure. The stirrups are hooped on the periphery of the reinforcement frame structure. In actual construction, the stirrups are prefabricated in batches using a steel bar bending machine, and then the stirrups are manually tied to the periphery of the reinforcement frame structure. However, in actual construction, there are often some positions on the beam reinforcement frame where stirrups are missing, or in order to avoid the insertion of steel bars of other beams and columns, the stirrups are unloaded and displaced, and then re-hooped. It is necessary to use small-diameter straight steel bars for on-site production and hooping of the stirrups. However, when bending the raw materials of the stirrups (generally small-diameter steel bars) on site, because the steel bar bending machine has no bending conditions, it is necessary to manually coat the small-diameter steel bars (stirrup raw materials) with steel pipes for bending. However, some small-diameter steel bars are long, and it is very inconvenient to coat them with steel pipes. Moreover, after bending at some angles, the steel pipes are inconvenient to remove, which is extremely inconvenient to use. Utility Model Content

[0003] The utility model aims to provide a bending device for small-diameter steel bars to solve the technical problems mentioned in the above background technology.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A bending device for small-diameter steel bars comprises: an arc wall, an embedding groove, and a fixing rod; the arc wall is a tensile wall structure with a longitudinal section of a semicircular arc, a fixing rod is fixed to one side of the arc wall, the axis line of the fixing rod and the arc axis line of the arc wall are perpendicular to each other, and a through slot is provided on the side of the arc wall away from the fixing rod to form an embedding groove.

[0006] The utility model is further configured as follows: in order to increase the applicable scope of the embedding groove, the embedding groove includes: a first embedding groove, a first arc bottom, a second embedding groove, a second arc bottom, a third embedding groove, and a third arc bottom; the first embedding groove, the second embedding groove, and the third embedding groove are all through grooves with parallel sides, and the widths of the first embedding groove, the second embedding groove, and the third embedding groove increase in sequence; wherein the third embedding groove is arranged on a side of the arc wall away from the fixing rod, a side of the third embedding groove close to the fixing rod is rounded to form a semicircular third arc bottom, the second embedding groove and the third arc bottom are connected, a side of the second embedding groove close to the fixing rod is rounded to form a semicircular second arc bottom, the first embedding groove and the second arc bottom are connected, and a side of the first embedding groove close to the fixing rod is rounded to form a semicircular first arc bottom.

[0007] The utility model is further configured as follows: in order to facilitate the insertion of the steel bar into the embedding groove, the overlapped portion of the third embedding groove and the edge of the arc wall is rounded or chamfered to form a chamfered portion.

[0008] The utility model is further configured as follows: in order to increase the lever arm of the bending stirrup, the fixing rod is a hollow tubular structure, and a telescopic tube with a tubular structure is coaxially embedded and fixed on the fixing rod.

[0009] The utility model is further configured as follows: in order to be able to quickly adjust and fix the total length of the fixed rod and the telescopic tube, that is, the length of the lever arm of the bent stirrup, a quick adjustment mechanism is provided between the fixed rod and the telescopic tube; the quick adjustment mechanism includes: a tail cylinder, a rotating shaft, a rotating arm, a toothing, a connecting ring, a spring, a limit block, and a steel cable; two sets of rotating shafts are provided on one side of the telescopic tube close to the embedded groove, and a rotating arm is rotatably matched on each of the two sets of rotating shafts, and a toothing is provided on the side of the rotating arm away from the axis of the telescopic tube, and a The holes are provided for the two groups of splines to pass freely. The other side of each group of splines extends in the direction of the axis of the telescopic tube and is rotatably matched with a connecting ring of an annular structure. A spring is connected and fixed between the two groups of connecting rings through a spring seat. The spring has an elastic tendency to stretch. A steel cable is connected to both groups of connecting rings. The other end of the steel cable is fixedly connected to a tail cylinder of a cylindrical hollow structure. The diameter of the tail cylinder is larger than the inner diameter of the fixed rod. The inner wall of the fixed rod is provided with array-distributed slots on the same side of the splines to form array slots. The splines are inserted in one of the array slots.

[0010] The utility model is further configured as follows: in order to facilitate the steel cable to pull the two groups of connecting rings closer and deflect more labor-saving, a guide plate with a circular plate structure is fixed on the side of the telescopic tube close to the rotating shaft, and a circular hole is provided in the center of the guide plate. The two groups of steel cables penetrate the central circular hole of the guide plate and are then connected to the tail cylinder.

[0011] The utility model is further configured as follows: in order to prevent the tail cylinder from shifting after the total length of the fixed rod and the telescopic tube is adjusted, a positioning column with a cylindrical structure is provided on one side of the tail cylinder close to the telescopic tube, the outer diameter of the positioning column is consistent with the inner diameter of the telescopic tube, and the positioning column is embedded in the telescopic tube.

[0012] The utility model is further configured as follows: in order to prevent the insert teeth from expanding to both sides without restriction under the action of the spring elastic force, thereby increasing the wear on the array slot, a limit block with a block-shaped structure is provided on the rotating arm, and a side of the limit block close to the inner wall of the telescopic tube is configured as an arc-shaped wall. When the arc-shaped wall of the limit block contacts the inner wall of the telescopic tube, the insert teeth reach the maximum expansion position.

[0013] In summary, the utility model has the following beneficial effects:

[0014] ① The stirrups can be bent very conveniently: by setting up the arc wall, embedded groove and fixed rod, the stirrups to be bent are embedded in the embedded groove, and then the arc wall passes under the transverse reinforcement at the corner, as shown in the figure, and the corresponding stirrups are embedded in the first arc bottom, the second arc bottom and the third arc bottom of the same size or similar size. At this time, the position where the transverse reinforcement and the arc wall are tangent is used as the fulcrum. Relying on the principle of lever, the fixed rod and the telescopic tube are pressed down as a whole. Under the downward pressure of the fixed rod and the telescopic tube, the stirrups are bent, thereby completing the bending operation of the stirrups.

[0015] ② The force arm of the bent steel bar can be adaptively adjusted: through the establishment of a quick adjustment mechanism, the total length of the fixed rod and the telescopic tube can be adjusted to enter the force arm of the adjustment lever, so that bending the stirrups is more labor-saving. When the total length of the fixed rod and the telescopic tube needs to be adjusted, the tail cylinder is pulled back by hand. The tail cylinder pulls the two connecting rings through the steel cable, and the spring is compressed and slightly elastically bent; because of the guiding effect of the guide plate, the two pulled connecting rings will move closer to each other, thereby driving the connecting ring, the insert gear, and the rotating arm to deflect around the rotating axis in the direction close to the axis center line of the telescopic tube, until When the tooth is disengaged from the array slot, the position limit between the fixed rod and the telescopic tube is released, and the telescopic tube can be pulled out from the fixed rod to change the total length of the fixed rod and the telescopic tube. When the total length of the fixed rod and the telescopic tube is determined, the tail cylinder is released, and the two connecting rings move away from each other under the elastic force of the spring, thereby driving the connecting ring, the tooth and the rotating arm to deflect around the rotating shaft in the direction away from the axial center line of the telescopic tube as a whole, until the tooth is inserted into the nearest array slot to re-limit the position of the fixed rod and the telescopic tube, thereby completing the adjustment of the force arm of the bent steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the embedded groove in the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the embedded groove in the utility model into which steel bar rings of various sizes are embedded;

[0019] Figure 4 It is a partially cutaway structural schematic diagram of the utility model;

[0020] Figure 5 yes Figure 4 A magnified view of the structure in the middle;

[0021] Figure 6 yes Figure 4 A magnified view of the structure at B in the middle;

[0022] Figure 7It is a schematic diagram of the use principle of the utility model;

[0023] In the figure, 1, arc wall; 2, embedded groove; 3, fixing rod; 4, telescopic tube; 5, quick adjustment mechanism; 6, beam reinforcement frame; 21, first embedded groove; 22, first arc bottom; 23, second embedded groove; 24, second arc bottom; 25, third embedded groove; 26, third arc bottom; 27, chamfered portion; 31, array groove; 41, guide plate; 51, tail cylinder; 52, rotating shaft; 53, rotating arm; 54, inserting gear; 55, connecting ring; 56, spring; 57, limit block; 58, steel cable; 59, positioning column; 61, longitudinal reinforcement; 62, transverse reinforcement; 63, stirrups. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Example:

[0026] See also Figure 1-Figure 7 , the utility model provides a technical solution:

[0027] A bending device for small-diameter steel bars comprises: an arc wall 1, an embedding groove 2, and a fixing rod 3; the arc wall 1 is a tensile wall structure with a longitudinal section of a semicircular arc, a fixing rod 3 is fixed to one side of the arc wall 1, the axis line of the fixing rod 3 and the arc axis line of the arc wall 1 are perpendicular to each other, and a through slot is provided on the side of the arc wall 1 away from the fixing rod 3 to form the embedding groove 2.

[0028] In order to increase the applicable scope of the embedded groove 2, the embedded groove 2 includes: a first embedded groove 21, a first arc bottom 22, a second embedded groove 23, a second arc bottom 24, a third embedded groove 25, and a third arc bottom 26; the first embedded groove 21, the second embedded groove 23, and the third embedded groove 25 are all through grooves with parallel sides, and the widths of the first embedded groove 21, the second embedded groove 23, and the third embedded groove 25 are increased in sequence; wherein the third embedded groove 25 is arranged on the side of the arc wall 1 away from the fixing rod 3, the side of the third embedded groove 25 close to the fixing rod 3 is rounded to form a semicircular third arc bottom 26, the second embedded groove 23 and the third arc bottom 26 are connected, the side of the second embedded groove 23 close to the fixing rod 3 is rounded to form a semicircular second arc bottom 24, the first embedded groove 21 and the second arc bottom 24 are connected, and the side of the first embedded groove 21 close to the fixing rod 3 is rounded to form a semicircular first arc bottom 22.

[0029] In order to facilitate the insertion of the steel bar into the embedding groove 2 , the overlapped portion between the third embedding groove 2 and the edge of the arc wall 1 is rounded or chamfered to form a chamfered portion 27 .

[0030] In order to increase the lever arm of the bent stirrup 63 , the fixing rod 3 is a hollow tubular structure, and a telescopic tube 4 of a tubular structure is coaxially embedded and fixed on the fixing rod 3 .

[0031] In order to quickly adjust and fix the total length of the fixed rod 3 and the telescopic tube 4, that is, the length of the lever arm of the bent stirrup 63, a quick adjustment mechanism 5 is provided between the fixed rod 3 and the telescopic tube 4; the quick adjustment mechanism 5 includes: a tail cylinder 51, a rotating shaft 52, a rotating arm 53, a slotting gear 54, a connecting ring 55, a spring 56, a limit block 57, and a steel cable 58; the telescopic tube 4 is provided with two sets of rotating shafts 52 on one side close to the embedding groove 2, and a rotating arm 53 is rotatably matched on the two sets of rotating shafts 52 respectively, and a slotting gear 54 is provided on the side of the rotating arm 53 away from the axis of the telescopic tube 4, and the telescopic tube 4 is provided with two sets of rotating shafts 52. The holes through which the inserting teeth 54 can pass freely, the other side of each group of inserting teeth 54 extends toward the direction of the axis of the telescopic tube 4 and is rotatably matched with a connecting ring 55 of an annular structure, a spring 56 is connected and fixed between the two groups of connecting rings 55 through a spring seat, and the spring 56 has an elastic tendency to stretch; a steel cable 58 is connected to both groups of connecting rings 55, and the other end of the steel cable 58 is fixedly connected to a tail cylinder 51 of a cylindrical hollow structure, the diameter of the tail cylinder 51 is larger than the inner diameter of the fixed rod 3, and the inner wall of the fixed rod 3 is provided with array-distributed slots on the same side of the inserting teeth 54 to form an array groove 31, and the inserting teeth 54 are inserted into one of the groups of array grooves 31.

[0032] In order to save effort when the steel cables 58 pull the two groups of connecting rings 55 closer to deflect, a guide plate 41 with a circular plate structure is fixed to the side of the telescopic tube 4 close to the rotating shaft 52. A circular hole is provided in the center of the guide plate 41. The two groups of steel cables 58 penetrate the central circular hole of the guide plate 41 and are then connected to the tail cylinder 51.

[0033] In order to prevent the tail cylinder 51 from shifting after the total length of the fixed rod 3 and the telescopic tube 4 is adjusted, a cylindrical positioning column 59 is provided on the side of the tail cylinder 51 close to the telescopic tube 4. The outer diameter of the positioning column 59 is consistent with the inner diameter of the telescopic tube 4, and the positioning column 59 is embedded in the telescopic tube 4.

[0034] In order to prevent the inserting teeth 54 from expanding to both sides without restriction under the elastic force of the spring 56, thereby increasing the wear on the array slot 31, a block-shaped limit block 57 is provided on the rotating arm 53, and the side of the limit block 57 close to the inner wall of the telescopic tube 4 is configured as an arc-shaped wall. When the arc-shaped wall of the limit block 57 contacts the inner wall of the telescopic tube 4, the inserting teeth 54 reaches the maximum expansion position.

[0035] Brief description of the usage process:

[0036] like Figure 1As shown, the beam reinforcement frame 6 is composed of longitudinal reinforcement 61, transverse reinforcement 62, and stirrups 63. The longitudinal reinforcement 61 and the transverse reinforcement 62 form a strip-shaped reinforcement frame structure. The stirrups 63 are hooped on the periphery of the reinforcement frame structure. In actual construction, the stirrups 63 are prefabricated in batches using a steel bar bending machine, and then the stirrups 63 are manually tied to the periphery of the reinforcement frame structure. However, in actual construction, there are often some positions on the beam reinforcement frame 6 where the stirrups 63 are missing, or in order to avoid the insertion of steel bars of other beams and columns, the stirrups 63 are unloaded and displaced and then hooped again. It is necessary to use small-diameter straight steel bars to make and hoop the stirrups 63 on site, and at this time, the present invention is needed;

[0037] When the utility model is used, Figure 7 As shown in FIG. 1 , the stirrup 63 to be bent is embedded in the embedding groove 2, and then the arc wall 1 passes under the transverse reinforcement 62 at the corner position, as shown in FIG. Figure 3 As shown, the corresponding stirrups 63 are embedded in the first arc bottom 22, the second arc bottom 24, and the third arc bottom 26 of the same size or similar size. At this time, the position where the transverse reinforcement 62 is tangent to the arc wall 1 is used as a fulcrum. Relying on the principle of leverage, the fixing rod 3 and the telescopic tube 4 are pressed down as a whole. Under the downward pressure of the fixing rod 3 and the telescopic tube 4, the stirrups 63 are bent, thereby completing the bending operation of the stirrups 63.

[0038] The total length of the fixed rod 3 and the telescopic tube 4 can be adjusted to enter the lever arm, so that bending the stirrup 63 is more labor-saving. When the total length of the fixed rod 3 and the telescopic tube 4 needs to be adjusted, the tail cylinder 51 is pulled backward by hand, and the tail cylinder 51 pulls the two connecting rings 55 through the steel cable 58, and the spring 56 is compressed and slightly elastically bent (this slight elastic bending does not affect the elastic force expression of the spring 56); because of the guiding effect of the guide plate 41, the two pulled connecting rings 55 will move closer to each other, thereby driving the connecting ring 55, the insert gear 54, and the rotating arm 53 to deflect as a whole around the rotating shaft 52 in the direction close to the axial center line of the telescopic tube 4 until the insert gear 54 is disengaged from the array slot 31 At this time, the position limit between the fixed rod 3 and the telescopic tube 4 is released, and the telescopic tube 4 can be pulled out from the fixed rod 3 to change the total length of the fixed rod 3 and the telescopic tube 4. When the total length of the fixed rod 3 and the telescopic tube 4 is determined, the tail cylinder 51 is released, and under the elastic force of the spring 56, the two connecting rings 55 move in the direction away from each other, thereby driving the connecting ring 55, the inserting gear 54, and the rotating arm 53 to deflect as a whole around the rotating shaft 52 in the direction away from the axial center line of the telescopic tube 4, until the inserting gear 54 is inserted into the nearest array groove 31 to re-limit the position of the fixed rod 3 and the telescopic tube 4, and then the stirrup 63 is bent by using the lengthened force arm in the same way as above.

[0039] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A bending device for small diameter steel bars, comprising: An arc wall (1), an embedding groove (2), and a fixing rod (3); the characteristics are: the arc wall (1) is a tensile wall structure with a longitudinal section of a semicircular arc, a fixing rod (3) is fixed to one side of the arc wall (1), the axis of the fixing rod (3) and the arc axis of the arc wall (1) are perpendicular to each other, and a through slot is provided on the side of the arc wall (1) away from the fixing rod (3) to form the embedding groove (2).

2. A bending device for small diameter steel bars according to claim 1, characterized in that: The embedding groove (2) comprises: a first embedding groove (21), a first arc bottom (22), a second embedding groove (23), a second arc bottom (24), a third embedding groove (25), and a third arc bottom (26); the first embedding groove (21), the second embedding groove (23), and the third embedding groove (25) are all through grooves with parallel sides, and the widths of the first embedding groove (21), the second embedding groove (23), and the third embedding groove (25) increase in sequence; wherein the third embedding groove (25) is arranged at the arc wall (1) away from the fixing rod (3 ), the third embedded groove (25) is rounded on one side close to the fixing rod (3) to form a semicircular third arc bottom (26), the second embedded groove (23) and the third arc bottom (26) are connected, the second embedded groove (23) is rounded on one side close to the fixing rod (3) to form a semicircular second arc bottom (24), the first embedded groove (21) and the second arc bottom (24) are connected, and the first embedded groove (21) is rounded on one side close to the fixing rod (3) to form a semicircular first arc bottom (22).

3. A bending device for small diameter steel bars according to claim 2, characterized in that: The overlapped portion between the third embedding groove (25) and the edge of the arc wall (1) is rounded or chamfered to form a chamfered portion (27).

4. The bending device for small diameter steel bars according to claim 1, characterized in that: The fixing rod (3) is a hollow tubular structure, and a telescopic tube (4) of tubular structure is coaxially embedded and fixed on the fixing rod (3).

5. The bending device for small diameter steel bars according to claim 4, characterized in that: A quick adjustment mechanism (5) is provided between the fixing rod (3) and the telescopic tube (4); the quick adjustment mechanism (5) comprises: a tail cylinder (51), a rotating shaft (52), a rotating arm (53), a spline (54), a connecting ring (55), a spring (56), a stop block (57), and a steel cable (58); two sets of rotating shafts (52) are provided on a side of the telescopic tube (4) close to the embedding groove (2); a rotating arm (53) is rotatably matched on each of the two sets of rotating shafts (52); a spline (54) is provided on a side of the rotating arm (53) away from the axis of the telescopic tube (4); holes are provided on the telescopic tube (4) for the two sets of spline (54) to pass freely; each set of spline (54) is provided with a plurality of holes. ) extends toward the direction of the axis of the telescopic tube (4) and is rotatably matched with a connecting ring (55) of an annular structure. A spring (56) is connected and fixed between the two groups of connecting rings (55) through a spring seat. The spring (56) has an elastic tendency to stretch. Both groups of connecting rings (55) are connected with a steel cable (58). The other end of the steel cable (58) is fixedly connected to a tail cylinder (51) of a cylindrical hollow structure. The diameter of the tail cylinder (51) is larger than the inner diameter of the fixing rod (3). The inner wall of the fixing rod (3) is provided with array-distributed slots on the same side of the inserting tooth (54) to form an array slot (31). The inserting tooth (54) is inserted into one of the array slots (31).

6. A bending device for small diameter steel bars according to claim 5, characterized in that: A guide plate (41) with a circular plate structure is fixed on one side of the telescopic tube (4) close to the rotating shaft (52). A circular hole is provided at the center of the guide plate (41). Two groups of steel cables (58) penetrate the central circular hole of the guide plate (41) and are then connected to the tail cylinder (51).

7. The bending device for small diameter steel bars according to claim 5, characterized in that: A cylindrical positioning column (59) is provided on one side of the tail cylinder (51) close to the telescopic tube (4); the outer diameter of the positioning column (59) is consistent with the inner diameter of the telescopic tube (4); and the positioning column (59) is embedded in the telescopic tube (4).

8. The bending device for small diameter steel bars according to claim 5, characterized in that: The rotating arm (53) is provided with a block-shaped limit block (57), and a side of the limit block (57) close to the inner wall of the telescopic tube (4) is provided with an arc-shaped wall. When the arc-shaped wall of the limit block (57) contacts the inner wall of the telescopic tube (4), the inserting teeth (54) reach the maximum expansion position.

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