CN115947220A - Lifting appliance for U-shaped steel bar - Google Patents

Abstract

The invention relates to the technical field of hanging machinery, in particular to a lifting appliance for U-shaped steel bars. The lifting device comprises a row storage rack and a lifting mechanism, wherein the row storage rack is used for storing a plurality of U-shaped steel bars, and the plurality of U-shaped steel bars are arranged on the row storage rack at equal intervals so as to be convenient for carrying the plurality of U-shaped steel bars simultaneously; the hoisting mechanism is arranged on two sides of the material storage rack, the hoisting mechanism comprises a hoisting tool support, a driving structure and a plurality of clamping structures, the plurality of clamping structures and the plurality of U-shaped steel bars are arranged in a one-to-one correspondence mode, the driving structure and the clamping structures are arranged at two ends of the hoisting tool support, the driving structure can drive the clamping structures to clamp two sides of the U-shaped steel bars, when the U-shaped steel bars are conveyed, the clamping structures clamp two ends of the U-shaped steel bars tightly, and therefore the U-shaped steel bars can be prevented from being moved to drop in the conveying process, and therefore the purpose that the plurality of U-shaped steel bars are moved simultaneously is achieved.

Description

Lifting appliance for U-shaped steel bar

Technical Field

The invention relates to the technical field of hanging machinery, in particular to a lifting appliance for U-shaped steel bars.

Background

The existing building needs to be built by matching a plurality of groups of building materials, wherein more U-shaped steel bars are used, the purpose of the U-shaped steel bars is to assist the forming of cement in the building, the forming of the cement cannot be separated from the fixing of the U-shaped steel bars, but most of the existing U-shaped steel bars are carried by binding two parts of a plurality of stacked U-shaped steel bars by workers through iron chains or steel wire ropes, then the U-shaped steel bars are hoisted into a steel bar framework binding clamping fixture by a gantry crane, then the bound iron chains or steel wire ropes are untied manually, the steel bars are sorted out one by one, and finally the workers carry the U-shaped steel bars to a specified position one by one.

The problems existing in the prior art are as follows: be mixed and disorderly state after the reinforcing bar shaping, can not neatly arrange in order, still need the manual work to go to pick when placing it in the roof beam, take a lot of work hard and efficiency is very low, still needs the workman to carry it to assigned position one by one simultaneously, leads to the high handling efficiency of handling cost to hang down.

Therefore, a hanger for U-shaped reinforcing bars is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a lifting appliance for U-shaped reinforcing steel bars, which can convey a plurality of U-shaped reinforcing steel bars to an appointed position and improve conveying efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

u-shaped hoist for reinforcing bar includes:

the device comprises a row of storage racks, a plurality of supporting rods and a plurality of supporting rods, wherein the row of storage racks is used for storing a plurality of U-shaped steel bars, and the plurality of U-shaped steel bars are arranged on the row of storage racks at equal intervals;

the lifting mechanism is arranged on two sides of the material arranging and storing frame and comprises a lifting appliance support, a driving structure and a plurality of clamping structures, the driving structure and the clamping structures are arranged at two ends of the lifting appliance support, and the driving structure can drive the clamping structures to clamp two sides of the U-shaped reinforcing steel bars.

As an optimal technical scheme of the lifting appliance for the U-shaped steel bar, the clamping structure comprises a linkage unit and a plurality of clamping arms, the linkage unit is rotatably connected with the plurality of clamping arms, the linkage unit is connected with the driving structure, and the linkage unit can push the plurality of clamping arms to move towards the U-shaped steel bar at the same time.

As an optimal technical scheme of the lifting appliance for the U-shaped steel bar, the clamping arm comprises a clamping arm main body and an elastic restoring piece, one end of the elastic restoring piece is fixedly connected with the clamping arm main body, the other end of the elastic restoring piece is fixedly connected with the lifting appliance support, and the clamping arm main body is rotatably connected with the lifting appliance support.

As an optimal technical scheme of the lifting appliance for the U-shaped steel bar, the lifting appliance support is provided with a steel bar positioning seat, and the clamping arm is rotatably connected with the steel bar positioning seat.

As a preferable technical solution of the hanger for U-shaped steel bar, a clamping plate is disposed at an end of the clamping arm contacting the U-shaped steel bar.

As an optimal technical scheme of the U-shaped lifting appliance for the steel bars, the linkage unit comprises two linkage plates and a plurality of extrusion plates, the driving structure is fixedly arranged at two ends of the lifting appliance support along the length of the first direction, each linkage plate is close to one end of the lifting appliance support and is connected with the output end of the driving structure, the extension direction of the linkage plates is in the same direction with the width direction of the lifting appliance support, one end of each extrusion plate is rotatably connected with the linkage plates, the other end of each extrusion plate is rotatably connected with the lifting appliance support, the other end of each extrusion plate is of a fan-shaped structure, and the distance from the connecting point of each extrusion plate and the arc-shaped side edge of each lifting appliance support to the fan-shaped structure is increased.

As an optimal technical scheme of the lifting appliance for the U-shaped steel bar, the linkage unit further comprises a hinged shaft, one end of the hinged shaft is fixedly connected with the extrusion plate, the extending direction of the hinged shaft is perpendicular to the extending direction of the extrusion plate, a steel bar receiving plate is fixedly arranged at the other end of the hinged shaft, the steel bar receiving plate is perpendicular to the hinged shaft, and after the U-shaped steel bar is clamped, the steel bar receiving plate is perpendicular to the bending end of the steel bar.

As a preferable technical solution of the lifting appliance for U-shaped steel bars, a clamping adjustment wheel is arranged at one end of the clamping arm, which is in contact with the squeezing plate, and the clamping adjustment wheel is rotatably arranged at one end of the clamping arm.

As a preferred technical scheme of the lifting appliance for the U-shaped steel bar, a radial spherical plain bearing is arranged between the clamping adjusting wheel and the clamping arm.

As an optimal technical scheme of the lifting appliance for the U-shaped steel bar, the clamping arm further comprises a positioning rubber plate, and the positioning rubber plate and the clamping arm main body are respectively arranged on two sides of the clamping plate.

The invention has the beneficial effects that:

the lifting appliance for the U-shaped steel bars comprises a row storage rack and a lifting mechanism, wherein the row storage rack is used for storing a plurality of U-shaped steel bars, and the plurality of U-shaped steel bars are arranged on the row storage rack at equal intervals so as to be convenient for carrying the plurality of U-shaped steel bars at the same time; the hoisting mechanism is arranged on two sides of the material storage rack, the hoisting mechanism comprises a hoisting tool support, a driving structure and a plurality of clamping structures, the plurality of clamping structures and the plurality of U-shaped steel bars are arranged in a one-to-one correspondence mode, the driving structure and the clamping structures are arranged at two ends of the hoisting tool support, the driving structure can drive the clamping structures to clamp two sides of the U-shaped steel bars, when the U-shaped steel bars are conveyed, the clamping structures clamp two ends of the U-shaped steel bars tightly, and therefore the U-shaped steel bars can be prevented from being moved to drop in the conveying process, and therefore the purpose that the plurality of U-shaped steel bars are moved simultaneously is achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a front view of a U-shaped spreader for reinforcing bars according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a schematic diagram illustrating a state in which a U-shaped spreader clamping arm main body for a reinforcing bar according to an embodiment of the present invention is pushed;

FIG. 4 is a schematic view of a connection state of a driving structure and a clamping structure provided in an embodiment of the present invention;

FIG. 5 is a schematic diagram of the position of the squeeze plate and the clamping adjustment wheel provided in the embodiment of the present invention;

FIG. 6 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;

FIG. 7 is an enlarged view of a portion of FIG. 6 at II;

FIG. 8 is a cross-sectional view taken at B-B of FIG. 1;

fig. 9 is a side view of a U-shaped spreader for reinforcing bars according to an embodiment of the present invention;

fig. 10 is a partial enlarged view at III in fig. 9.

In the figure:

100. u-shaped steel bars;

1. a row of material storage racks; 2. a hanger bracket; 3. a drive structure; 4. a clamping structure; 41. a linkage unit; 411. a linkage plate; 412. a pressing plate; 413. hinging a shaft; 414. a steel bar receiving plate; 42. a clamp arm; 421. a clamp arm body; 422. an elastic restoring member; 423. a clamping plate; 424. positioning a rubber plate; 425. adjusting the screw; 5. a steel bar positioning seat; 6. clamping the regulating wheel; 7. a radial spherical plain bearing; 8. a lifting ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

In the prior art, workers mostly bind two parts of a plurality of stacked U-shaped steel bars by using iron chains or steel wire ropes, then the steel bars are lifted to a steel bar framework binding mould by a gantry crane, then the bound iron chains or steel wire ropes are manually untied, the steel bars are sorted out one by one, and finally the workers carry the steel bars to a specified position one by one.

The problems existing in the prior art are as follows: be mixed and disorderly state after the U-shaped reinforcing bar shaping, can not neatly arrange in order, still need the manual work to go to pick when placing the U-shaped reinforcing bar in the roof beam, take a lot of work hard and efficiency is very low, still needs the workman to carry the U-shaped reinforcing bar to assigned position one by one simultaneously, leads to the handling cost height handling efficiency low.

To this end, the present invention provides a U-shaped spreader for reinforcing bars, which can be simultaneously moved to a designated position.

As shown in fig. 1 and fig. 2, the U-shaped rebar lifting appliance includes a row storage rack 1 and a lifting mechanism, wherein the row storage rack 1 is used for storing a plurality of U-shaped rebars 100, and the plurality of U-shaped rebars 100 are arranged on the row storage rack 1 at equal intervals, so as to facilitate carrying of the plurality of U-shaped rebars 100 at the same time; hoisting mechanism sets up in arranging the both sides of storage rack 1, hoisting mechanism includes hoist support 2, drive structure 3 and a plurality of tight structure 4 of clamp, a plurality of tight structure 4 of clamp set up with a plurality of U-shaped reinforcing bar 100 one-to-one, and drive structure 3 and tight structure 4 of clamp all set up in hoist support 2's both ends, drive structure 3 can drive the both sides centre gripping that tight structure 4 of clamp will U-shaped reinforcing bar 100, when carrying U-shaped reinforcing bar 100, the tight structure 4 of clamp presss from both sides the both ends of U-shaped reinforcing bar 100, can prevent like this that U-shaped reinforcing bar 100 position in the handling from moving and causing and drop.

In some embodiments, with reference to fig. 2 to 5, the clamping structure 4 comprises a linkage unit 41 and a plurality of clamping arms 42, the linkage unit 41 is rotatably connected with the plurality of clamping arms 42, the linkage unit 41 is connected with the driving structure 3, and the linkage unit 41 can push the plurality of clamping arms 42 to move toward the U-shaped reinforcing bar 100 at the same time. This achieves the purpose of simultaneously clamping a plurality of U-shaped reinforcing bars 100 by a plurality of clamping arms 42.

Further, in this embodiment, the clamping arm 42 includes a clamping arm main body 421 and an elastic restoring member 422, one end of the elastic restoring member 422 is fixedly connected to the clamping arm main body 421, the other end of the elastic restoring member 422 is fixedly connected to the spreader support 2, and the clamping arm main body 421 is rotatably connected to the spreader support 2. Under the effect that hoist support 2 supported, can realize that clamping arm main part 421 rotates around hoist support 2 under linkage unit 41's promotion and connect, hoist support 2 provides support and spacing for clamping arm main part 421. The two ends of the elastic restoring member 422 are respectively and fixedly connected with the clamping arm main body 421 and the hanger bracket 2, so that when the thrust of the linkage unit 41 applied to the clamping arm main body 421 disappears, the elastic restoring member 422 can restore the clamping arm main body 421 under the action of the restoring force of the elastic restoring member 422.

The lateral wall of the clamping arm main body 421 towards the elastic restoring piece 422 is provided with a mounting hole, an adjusting screw 425 is arranged in the mounting hole, the adjusting screw 425 can adjust the length of the elastic restoring piece 422 extending into the mounting hole, and then the purposes of clamping the U-shaped steel bar 100 and restoring the clamping arm main body 421 to the initial position can be achieved.

Specifically, in this embodiment, with continued reference to fig. 2 and 3, the spreader bracket 2 is provided with a rebar positioning socket 5, and the clamping arm 42 is rotatably connected to the rebar positioning socket 5. Particularly, clamping arm main part 421 rotates with rebar positioning seat 5 and is connected, and the purpose that rebar positioning seat 5 set up can make clamping arm main part 421 can realize the pivoted purpose at the in-process that is promoted, can realize like this that clamping arm main part 421 upper end and lower extreme move to the opposite direction respectively to the realization is with the purpose that U-shaped reinforcing bar 100 presss from both sides tightly.

The clamp arm body 421 may be a C-shaped structure, and a specific shape of the clamp arm body 421 is provided herein, so long as the clamp arm body 421 can clamp the U-shaped reinforcement bar 100 within a protection range.

The clamping arm 42 also includes a clamping plate 423 that contacts the U-shaped bar 100. Specifically, the clamping plate 423 is disposed at the end of the clamping arm main body 421 contacting the U-shaped steel bar 100, and the clamping plate 423 directly contacts the clamping arm 42, so as to clamp the U-shaped steel bar 100.

In order to prevent the U-shaped bead 100 from being scratched by friction between the clamping plate 423 and the U-shaped bead 100, the clamping arm 42 further includes a positioning rubber plate 424, and the positioning rubber plate 424 and the clamping arm main body 421 are respectively provided on both sides of the clamping plate 423.

Specifically, in this embodiment, as shown in fig. 2 to 8, the linkage unit 41 includes two linkage plates 411 and a plurality of extrusion plates 412, the linkage plates 411 are fixedly connected to the driving structures 3, the driving structures 3 are fixedly disposed at two ends of the first direction length of the spreader bracket 2, so that the two driving structures 3 support the linkage plates 411, and at the same time, the linkage plates 411 can move relative to the spreader bracket 2, one end of the extrusion plate 412 is rotatably connected to the linkage plates 411, the other end of the extrusion plate 412 is rotatably connected to the spreader bracket 2, the other end of the extrusion plate 412 is of a fan-shaped structure, and distances from a connection point of the extrusion plate 412 and the spreader bracket 2 to each position of the arc-shaped side of the fan-shaped structure have an increasing trend. In this way, the pressing plate 412 can push the clamp arm main body 421 in the process of rotation, so that the clamp arm main body 421 can rotate relative to the hanger bracket 2, and the clamp arm main body 421 arranged oppositely is far away from or close to. In this embodiment, the driving structure 3 is preferably an air cylinder, and due to the characteristics of the air cylinder, in the process of clamping the U-shaped reinforcing bar 100, the linkage plate 411 does not move relatively, so as to ensure the clamping force of the clamping arm on the U-shaped reinforcing bar 100 and prevent the U-shaped reinforcing bar 100 from falling.

Optionally, in this embodiment, the linkage unit 41 further includes a hinge shaft 413, one end of the hinge shaft 413 is fixedly connected to the extrusion plate 412, the extending direction of the hinge shaft 413 is perpendicular to the extending direction of the extrusion plate 412, a reinforcing steel receiving plate 414 is fixedly disposed at the other end of the hinge shaft 413, the reinforcing steel receiving plate 414 is perpendicular to the hinge shaft 413, and the reinforcing steel receiving plate 414 is perpendicular to the bent end of the reinforcing steel. The reinforcing bar receiving plate 414 is fixedly coupled to the hinge shaft 413 such that the reinforcing bar receiving plate 414 can be rotated together with the hinge shaft 413. During the process of clamping the U-shaped reinforcing bar 100, the reinforcing bar receiving plate 414 and the main body of the clamping arm 42 act simultaneously, wherein the main body 421 of the clamping arm cooperates to clamp the two ends of the U-shaped reinforcing bar 100, and the reinforcing bar receiving plate 414 extends to the bottom of the U-shaped reinforcing bar 100 to support the U-shaped reinforcing bar 100. When the U-shaped reinforcing bar 100 is released, the cylinder rod of the cylinder retracts, and at this time, the linkage plate 411 also moves along with the retraction of the cylinder rod, so that the clamp arm main body 421 loses the extrusion of the extrusion plate 412 and is reset under the action of the elastic restoring member 422.

Further, in the present embodiment, as shown in fig. 9 and 10, the clamping adjustment wheel 6 is disposed at one end of the clamping arm 42, which is in contact with the pressing plate 412, and the clamping adjustment wheel 6 is rotatably disposed at one end of the clamping arm 42, and the clamping adjustment wheel 6 is disposed to facilitate pushing the clamping arm main body 421. Further, a radial spherical bearing 7 is provided between the clamp adjustment wheel 6 and the clamp arm 42. This facilitates the movement of the clamp arm body 421.

As shown in fig. 9, a lifting ring 8 is provided on the top of the spreader bracket 2, so as to facilitate lifting of the spreader bracket 2 by a crown block, a crane, a hoist, or the like.

The lifting appliance for the U-shaped steel bars has the following working process:

after the U-shaped steel bars 100 are arranged on the row of storage racks 1 at equal intervals, the driving structure 3 drives the linkage plate 411 to move linearly, the plurality of extrusion plates 412 connected with the linkage plate 411 can push the clamping arms 42 to rotate while rotating around the hinge shafts 413, and the clamping arms 42 can enable the two ends of the U-shaped steel bars 100 to be provided with the clamping arms 42 after rotating; then the driving structure 3 is restored to the original state, the clamping arm 42 is restored to the original state under the action of the elastic restoring piece 422, the hinge shaft 413 is restored to the original state, the clamping arm 42 rotates to clamp the U-shaped steel bar 100, the steel bar receiving plate 414 is located right below the bent end of the U-shaped steel bar 100 and can support the U-shaped steel bar 100, the U-shaped steel bar 100 is limited under the action of the clamping arm 42 and the steel bar receiving plate 414, a hook of the crown block penetrates through the hanging ring 8 to integrally lift the U-shaped steel bar 100 by using a lifting appliance, the purpose that the plurality of U-shaped steel bars 100 are simultaneously carried is achieved, after the U-shaped steel bars are carried to a destination, the driving structure 3 drives the linkage plate 411 to linearly move, the plurality of extrusion plates 412 connected with the linkage plate 411 can push the clamping arm 42 to rotate while rotating around the hinge shaft 413, the two ends of the U-shaped steel bar 100 can be released after the clamping arm 42 rotates, and the steel bar receiving plate 414 cannot limit the U-shaped steel bar 100. When needs will be because U-shaped reinforcing bar 100 equidistant sets up on arranging storage rack 1, after carrying assigned position like this, U-shaped reinforcing bar 100 still is the order and puts, constructor only need according to actual need take can, need not the letter sorting.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims (10)

1. U-shaped hoist for reinforcing bar, its characterized in that includes:

   the device comprises a row of storage racks (1) for storing a plurality of U-shaped steel bars (100), wherein the U-shaped steel bars (100) are arranged on the row of storage racks (1) at equal intervals;

   the lifting mechanism is arranged on two sides of the row storage rack (1), and comprises a lifting appliance support (2), a driving structure (3) and a plurality of clamping structures (4), wherein the driving structure (3) and the clamping structures (4) are arranged at two ends of the lifting appliance support (2), and the driving structure (3) can drive the clamping structures (4) to clamp two sides of the U-shaped steel bar (100).
2. 2. A U-shaped spreader for rebars according to claim 1 wherein the clamping structure (4) comprises a linkage unit (41) and a plurality of clamping arms (42), the linkage unit (41) being rotationally connected to the plurality of clamping arms (42), the linkage unit (41) being connected to the driving structure (3), the linkage unit (41) being capable of pushing the plurality of clamping arms (42) simultaneously towards the U-shaped rebars (100).
3. 3. The U-shaped spreader for rebars according to claim 2, wherein the clamping arm (42) comprises a clamping arm body (421) and an elastic restoring member (422), one end of the elastic restoring member (422) is fixedly connected with the clamping arm body (421), the other end of the elastic restoring member (422) is fixedly connected with the spreader bracket (2), and the clamping arm body (421) is rotatably connected with the spreader bracket (2).
4. 4. The U-shaped spreader for rebars according to claim 2, wherein the spreader bracket (2) is provided with a rebar positioning socket (5), and the clamping arm (42) is rotatably connected with the rebar positioning socket (5).
5. 5. Spreader for U-shaped tendons according to claim 2 characterized in that the ends of the clamping arms (42) that are in contact with the U-shaped tendons (100) are provided with clamping plates (423).
6. 6. The U-shaped lifting appliance for the steel bars as claimed in claim 2, wherein the linkage unit (41) comprises two linkage plates (411) and a plurality of extrusion plates (412), the driving structure (3) is fixedly arranged at two ends of a lifting appliance bracket (2) along the length of a first direction, one end of each linkage plate (411) close to the lifting appliance bracket (2) is connected with an output end of the driving structure (3), the extension direction of the linkage plate (411) is the same direction as the width direction of the lifting appliance bracket (2), one end of each extrusion plate (412) is rotatably connected with the linkage plate (411), the other end of each extrusion plate (412) is rotatably connected with the lifting appliance bracket (2), the other end of each extrusion plate (412) is of a fan-shaped structure, and the distance from the connection point of the extrusion plates (412) and the lifting appliance bracket (2) to the arc-shaped side edge of the fan-shaped structure has an increasing trend.
7. 7. The U-shaped lifting appliance for the steel bars according to claim 6, wherein the linkage unit (41) further comprises a hinge shaft (413), one end of the hinge shaft (413) is fixedly connected with the extrusion plate (412), the extension direction of the hinge shaft (413) is perpendicular to the extension direction of the extrusion plate (412), the other end of the hinge shaft (413) is fixedly provided with a steel bar receiving plate (414), the steel bar receiving plate (414) is perpendicular to the hinge shaft (413), and after the U-shaped steel bars (100) are clamped, the steel bar receiving plate (414) is perpendicular to the bent ends of the steel bars.
8. 8. The U-shaped spreader for steel bars according to claim 6, wherein one end of the clamping arm (42) contacting the squeeze plate (412) is provided with a clamping adjustment wheel (6), and the clamping adjustment wheel (6) is rotatably provided at one end of the clamping arm (42).
9. 9. Spreader for U-shaped steel bars according to claim 8 characterized in that a radial spherical plain bearing (7) is arranged between the clamping adjustment wheel (6) and the clamping arm (42).
10. 10. The U-shaped spreader for steel bars according to claim 5, wherein the clamping arm (42) further comprises a positioning rubber plate (424), the positioning rubber plate (424) and the clamping arm (42) body are respectively disposed at both sides of the clamping plate (423).

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