JPS58112609A - Method and device for spiral bending - Google Patents

Abstract

PURPOSE:To form a reinforcing steel bar easily to a spiral steel bar by subjecting the steel bar repeatedly to bending in a counterclockwise direction by cooperative operations of a rotatable center guide, gripping rolls bending rolls and a supporting bar while feeding out said bar by a specified length. CONSTITUTION:The preceding end of a reinforcing steel bar is fed to the position slightly beyond the bending roll 66 of a spiral bender 10, and rolls 78, 46 are advanced to grasp the bar 12 with a center quide 22 and a roll 46. After the bar 12 is pressed and bent upward by advancing a bending roll 66, a turntable 20 is rotated 90 deg. on a counterclockwise direction and the quide 22 is similarly rotated 90 deg. to bend the preceding end of the bar 12 in a counterclockwise direction and is brought into contact with a supporting bar 76. While the bar 12 is fed by each specified length, the bar is bent in a counterclockwise direction by repeating the above-mentioned operations, whereby the spiral bar is formed relatively easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spiral music method and apparatus therefor.

2. Description of the Related Art A known method for spirally bending a bar-shaped workpiece, such as a reinforcing bar, is to wrap the reinforcing bar around a roller.

However, in this method, the roller is fixed and the reinforcing bar is wound around the roller, or the reinforcing bar is wound around the roller by rotating the roller. However, in any case, the rollers require a considerable diameter and length, and the former requires a larger and more complicated 1fII channel for laying reinforcing bars, while the latter requires a large driving force, and the equipment for this is required. turns into a giant crab! 1iiiI11
1. In addition to this, it also has the disadvantage of poor operability. Therefore, it was difficult to quickly and easily perform spiral bending at a desired location as needed. For example, spiral bars used as reinforcement materials in civil engineering and construction work are themselves large and heavy, so spiral bends are processed from a processing factory where the amount of iron is placed.
To provide a method for rapidly producing CS/9-rails at a work site as needed, and a compact and easy-to-operate method for this purpose, which is undesirable if the entire c/9-rail is conveyed, as it may make it difficult to carry out the work scheduled. It has long been desired to devise a device with superior performance.

The object of the present invention is to provide a spiral bending method and an apparatus therefor, which can quickly and easily perform spiral bending by a method completely different from the conventional method.

Embodiments of the invention will now be described in detail with reference to the following aspects.

As shown in FIGS. 1 and 2, the spiral curve according to the present invention consists of a sizing feeder 14 that feeds a reinforcing bar 12 a predetermined length, and a sizing feeder 14 that holds the reinforcing bar. It is equipped with a press-bending machine @16. In the embodiment, the spiral bending device 10 is arranged on a press bending machine 18, and a center guide 22 mounted on a turntable 20 of a shear pressing machine serves as a fixed-length feed 9 mechanism 14tD@forming member. . Here, the center guide 22 is bolted onto a disc 24 that is detachably mounted on the turntable 20.

The disk 24 is composed of a large-diameter 7"4 disk 26 and a small-diameter disk zJ welded to the large-diameter disk. The central mounting of the turntable/table 20 is fitted into a hole 32. Also, the large diameter disc 26 is mounted through a hole 33, and the turntable 20 is mounted through a hole 34 through which a stopper 36 is fitted. .

The pushing mechanism 16 clamps the reinforcing bar IXt, which is the workpiece, and presses the tip of the reinforcing bar from the sides to give a predetermined spiral pitch. 4J and A*. A clamping row 246 that can freely rotate once is attached to the tip of the clamping + stepped rectangular rod 44 via a support piece 45.
It is equipped with The other end of the rod 44 extends into a case 48 that is removably mounted on the bender 18. The rod 44 has a central screw hole 49 extending in the axial direction, into which a screw of a rotating shaft 50 is screwed. This rotating shaft v7) joFi, case 41jj/C is marked as rotatable but not movable. Therefore, by rotating the rotary shaft 60 with the handle 52, the rod 44 is moved forward or backward. Outside the pinching roller 46
A groove #154, for example a V-shaped groove, is formed at the mark 1 so that the reinforcing bar 12 can be gripped with sufficient JIil friction.

On the other hand, a large number of vertical grooves 56 are formed on the outer circumferential surface of the center guide 22 to increase the frictional force between the center guide 22 and the reinforcing bars 12.

Here, conversely, the Kll groove on the outer circumferential surface of the holding row 241F and the V-shaped groove may be formed on the outer circumferential surface of the center guide 22, or a vertical groove or a V-shaped groove may be formed on both. , the reinforcing bar 1z is clamped between the clamping roller 46 and the center guide 22, and the clamping roller is connected to the fixed length feeding mechanism 14.
The center guide constitutes a part of the holding means 40, respectively.

In addition, the pushing and bending means 42 includes a bending means 60 for pressing and bending the reinforcing bars 12 in the horizontal direction, and a second bending means 6z for pushing and bending the reinforcing bars upward. *1 The bending means 60 includes a rotatable roller #6 attached to the tip of a rectangular rod 64 via a support piece 65. The rod 64 is connected to the roller 4g (rod 44 and 1 for D).
The other end is screwed to the rotary shaft 10, so that the rondro 4 moves forward or backward as the rotary shaft rotates 100 times. On the other hand, in the 20th run, the means 62 is rotatably attached to the female bolt 14 screwed into the threaded hole 72 of one country of the press-bending IIJJI through the screw bolt R5, as shown in Fig. wJ3. It has a horizontal support par of 16. The mounting of the bolt 14 is adjusted by height 4 nuts 11, and the spiral pitch of the mounting is determined from the height difference between the height and the height of the reinforcing bar 12.

In the first flA, the guide roller 78 prevents the reinforcing bar 12 from coming off during machining, and is structurally similar to Fi-12.
46, detailed explanation will be omitted.

A processing method using the spiral bending device 10 having the above configuration will be described below. First, the workpiece, which is the reinforcing bar 1, is filtrated 4A.
As shown in the figure, the song is fed in the direction of the arrow to a position slightly beyond the roller 66.

Thereafter, the rods for rollers 1B and 46 are respectively advanced. The clamping rows 246 are each advanced to a position where the reinforcing bar 12 is clamped between the center guide 22 and the guide roller 7# and to approximately the same position as the clamping roller 46. Then, the rod 64 is moved forward and the rod 64 is bent so that the pipe side of the row 266 presses the reinforcing bar 1z, thereby pushing the tip of the reinforcing bar 9.

@4A At the forward position 11't shown by the dashed line in Fig. 4A, the roller 66 moves forward and presses the reinforcing bar 12. After +, drive source (
(not shown) and rotates the turntable 20 counterclockwise by a predetermined angle, for example, 90 degrees, the center guide 22 also rotates 90'Ji in the direction of the hour hand. Here, in order to increase the frictional force, the center guide 22 is vertically #I
56, the roller 46 is formed with a V-shaped groove 54, so the reinforcing bar 12 is connected to the center guide z1 and the loan 4C.
It is firmly held between

However, since the roller 46 is rotatable, the reinforcing bar 11 is forcibly and smoothly sent an unspecified distance to the right as the center guide 22 rotates. This sending) weighing center guide xz
6IIf-L=f as a function of radius r and its turning angle [#
It is represented by r# (f is the coefficient of friction), and unless the center guide cow 11r is changed by the rotation angle 0t, it will be a negative value. Nine reinforcing bars 12 fed a certain length are bent by bending rollers 6 located on the path.
6 and is pressed against the surface. The song here is Lola 66it
Vi#11-, the reinforcing bars 12 are prevented from being damaged in the vertical direction. As shown in FIG. 4B, the bending roller 66
Advance @adjust wrinkles. Thereafter, by rotating the turntable 20 counterclockwise (rc), the reinforcing bar 12 is bent with a radius of curvature R in a horizontal plane. However, a circular rotatable support par 76 is positioned on the path of the reinforcing bar 12, and comes into contact with the support par above the axis of the supporting par at the tip of the reinforcing bar (Fig. 5A, 9°) Therefore, as the reinforcing bar 12 moves forward, Accordingly, as the 58th prisoner K does, while rotating the support par 76, the reinforcing bar 12 is bent upward in the straight direction. The spiral pitch p of the reinforcing bar 12 is determined by controlling the height of the piece, and the spiral pitch p of the reinforcing bar 12 is determined by adjusting the height of the piece.
The preparatory operation is completed by setting the radius of curvature R to a predetermined value, and then the turntable 20 is repeatedly rotated by a predetermined angle to repeat the p fixed-dimension feeding process and the pressing process to reach a predetermined square pitch p. Spiral reinforcing bars with a radius of curvature R are successively produced 9 vertically upward, as shown in 4th CvA and 5th C@.

In the above embodiment, the reinforcing bar 1z is bent in a horizontal plane and then bent upward, thereby being bent three-dimensionally. However, without giving up on this two-step process,
It goes without saying that the reinforcing bars may be bent three-dimensionally at one time. Further, the reinforcing bars 12 are produced one after another in an upward direction, and the direction in which they extend is not limited to the upward direction, and the spiral bending device can be attached downward or to the side by changing the condition.

As mentioned above, the spiral bending method according to the present invention includes a leg-feeding step in which the workpiece is fed a predetermined length, and a pressing step in which the leading edge of the workpiece is pressed while giving a predetermined spiral pitch. The workpiece is bent into a spiral shape by repeating a processing cycle comprising steps and.

By such a method, it is possible to quickly and easily perform the folding process as needed, and it is possible to provide an apparatus that has excellent transportability without increasing the size of the apparatus.

Furthermore, the spiral piece according to the present invention for carrying out the method includes a foot feed mechanism for feeding the workpiece into a predetermined amount, a means for holding the workpiece, and the workpiece. The pressing surface includes means for pressing the tip end of the pressing surface to give a predetermined spiral pitch, and the pressing surface is provided with a mechanism that can move forward and backward. In such a device, bending can be done by inserting a workpiece into a predetermined length using a foot size shim, and pressing the workpiece using a pressing surface to give a predetermined width and width. It is made continuously and can be spirally processed quickly and easily. In addition, the device does not require a winding roller like the conventional one and is not large in size, has a simple structure, and has excellent conveyance performance. How the spiral bending device according to the present invention can be made smaller can be easily understood from the example in which the spiral bending device is attached and attached to a known pressing machine.

The above embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and modifications within the technical scope of the present invention are also included in the present invention. Needless to say, Kotosha. Even if the d-sizing feeding mechanism has a structure in which the knee to be applied is inserted, it is not limited to a part using a center guide and a clamping roller as shown in the figure. It goes without saying that it is sufficient that the pressing mechanism is configured to press the knee by applying a predetermined pitch to the applied knee.

[Brief explanation of drawings]

FIG. 1 is a plan view of a spiral music apparatus according to the present invention;
Figure WJ2 is a partially broken dynamic view along the koji line in Figure 1, Figure 3 is a front view of the device, and Figures 4A to 4C are horizontal views. Figures 5 to 5C are machining procedure diagrams in the vertical direction. 10...Suf9iral song is equipment, 12...Reinforcing bar, 1
4... Foot dipping mechanism, 16... Pressing surface mechanism, 20.
...Tar7 table, 22...Center guide, 40
. . . clamping means, 42 . . . pressing surface is means, 46 . . . gripping roller, 66 . . . bending roller. Applicant's representative Patent attorney Takehiko Suzue No. 2 L4 10 Figure 3 1-,/-'----No-

Claims (1)

[Scope of Claims] (1) The step of feeding the workpiece by the required length υ and the pressing surface of pressing the tip of the knee to be applied without giving a predetermined amount of force are two steps. Spiral bending is a method that bends a workpiece into a uniform shape by repeating a machining cycle that is mutually biased. (2) The method according to the first subsection of claim W5, in which the pressing step comprises one step. (J) The 1st facing surface facing process is perpendicular to the 1st. tWfW consisting of 21 phases that press the workpiece in the j-th order from the second pressing force direction! Fa' II + Ice Pankyoku The Su Heiraru piece described in section 1 is a method. (4) Short-distance feed for feeding the workpiece over a fixed length; a means for clamping the workpiece, and a mechanism that can move forward and backward to press the tip of the workpiece with a clamping force to give a predetermined length. a spiral bending device comprising a pressing surface mechanism and a zt-pressing surface mechanism; (5) The fixed size feed mechanism has a rotating roller that rotates at a predetermined angle, and the clamping means has a rotatable clamping roller that clamps the workpiece between it and the rotating roller, and moves back and forth. 4. The apparatus according to claim 4, wherein the pressing surface has four rotatable rollers for pressing the tip of the workpiece.