JPS61269945A - Device for preventing revolution of rod - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and a device for preventing the rotation of a rod being advanced, particularly in an apparatus for straightening and finally bending.

BACKGROUND OF THE INVENTION In the current state of the art, straightening and/or stirrup devices for bending, cutting, or otherwise processing steel rods automatically straighten rods or wires fed from coils. It is well known that it is becoming more common to be amputated. In this prior art, a straightening or bending device (the latter being called, for example, a stirrup) works on a constantly fed rod or wire by means of a straightening device or an advancing roller device. Then, by bending and cutting the material that is being fed forward, a stay lub is manufactured (Italian Patent No. 1,024,224, Del Fabro). There is no bending involved, just straightening and then cutting to make stock.

(Problem) A roller device that continuously supplies raw materials may cause uncontrollable rotation due to various reasons, especially when the raw materials are rods made by hot milling. These causes include, for example, non-uniformity of the material, non-perfectly circular cross section, surface imperfections, residual stress, and the like.

The resulting stirrup twist is a major drawback of automatic feed stirrup equipment.

Although many efforts have been made to eliminate this drawback,
not fully resolved.

Examples disclosed in Italian Patent Application No. 83472A83 filed October 12, 1983 include:
A traction plier device is used to hold the raw material and prevent it from twisting. It also includes a series of roller systems consisting of pairs of rollers, either unconstrained or driven by motors, which is achieved by means of a straightening device that advances the material in a serpentine manner. Efforts are being made. These devices are still used as straightening devices to pull or advance the raw material, but in no case do they prevent uncontrolled rotation of the rod. This results in twisted stirrups, for example in stirrup devices. The damage caused by this is storage,
It is important in transportation and in the erection of concrete reinforced structures.

(Means for solving the problems) It is therefore an object of the present invention to overcome these drawbacks and provide better correction. The present invention changes the working run of the rod by at least 10' from its previous trajectory by means of a guide system of an inclined series of arm levers with an unrestrained or driven roller system for deflection along the raw material. This problem is solved by directing the Typically, the limit for this deflection is 90'. because,
This is because excessive changes in direction not only cause deformation (of the material) but also increase the power required for the operation. However, for small diameters (on the order of millimeters or less), it is also possible to perform a direction change of 180°.

The main advantage of the invention is that the rod is constantly held in place by means of the angled series of arm lever guides described above. This solution can be realized by using the known roller guide device in a new form by setting it in a vertical and/or horizontal working plane.

The device is constructed as follows.

A deflection device for angular deflection of the path of the rod being advanced in a first working plane by means of two guide devices consisting of mutually oppositely located rollers realizing said inclined arm lever guide device. and a redirection for angularly redirecting the rods placed behind the first group of and the second inclined roller guide device and being advanced onto the forward working line parallel to said working plane. a device and another inclined roller placed between two respective deflection angles in a second working plane parallel to said working line, behind the first working plane and perpendicular thereto; It consists of a guide device and a redirection device for angularly redirecting the forwarded rod placed behind it to the forward work line parallel to the work platform.

With this solution, it is possible to prevent uncontrollable deviations of the forward-feeding rod from the deflection path. This is because the rod is constantly held by the roller guide device. moreover,
The advantage of increasing the effectiveness of each arm-lever guide device in the series is also created by deflecting the rod being advanced by a large amount with said deflection angle, with a bending radius approximately equal to the diameter of the deflection roller.

In an embodiment, a rod advancing roller arrangement is placed between the first two of the series of inclined roller guide arrangements. Furthermore, after the last page deflection device, a pair of roller guide devices, adjustable and located opposite each other, are provided for redirecting the rod into the working line.

The first of said inclined roller guide devices is adapted to vAfi5 depending on the respective inclination.

Additionally, in another embodiment, the upper roller of each roller guide device is pressure adjustable. According to this embodiment, the pressure (effect) on the rod is
It is possible to adjust the device depending on the diameter of the rod. In yet another embodiment, the paired deflection rollers are provided with grooves.

According to this embodiment, the rod has the following properties against lateral displacement:
It holds and can accommodate rods with different diameters. In yet another embodiment, the redirection device includes a pair of deflection angles inside the anvil roller and a pressure-adjustable roller device on the opposite side, and the redirection device includes a pair of deflection angles on the inside of the anvil roller and a pressure-adjustable roller device on the opposite side, and the redirection device is provided with a pressure-adjustable roller device on the opposite side. The correction can be adjusted. 1 (Example) Examples of the present invention will be described in detail below with reference to the drawings.

Figure 1 shows a rod coil feeder A, a roller straightening unit B placed in a horizontal plane, a roller straightening unit B' placed in a vertical plane, a pair of advance roller devices C, and cutting scissors @ FIG. 3 shows a stirrup device consisting of a bending device D, a bending device CE equipped with a guide fork f, and a bending nib n that rotates in order to bend a rod b to create a stirrup S.

As shown in FIGS. 2 and 3, the stirrup obtained by the prior art is twisted and the advancing roller device or roller straightening device is unable to hold the rod. This is because the rod is not perfectly circular, so if it is pinched by rollers located on opposite sides, it will tend to rotate along the rollers (see Figure 5). Uncontrollable rotation of the advancing rod can also be verified by bending the advancing rod using staggered large diameter advancing rollers (e.g. small diameter roller r' is for realizing a meandering path, resulting in a twisted stirrup S).

The present invention uses at least one deflection roller 1, and a series of arm levers p are provided on the forward-feeding rod b in front or behind the deflection roller 1, so that a series of inclined arms is provided. To realize a roller direction changing bag @R equipped with an idle lever L.

A solution using a tilted arm lever guide device is
As shown in Fig. 6, each arm guide lever L
There is room to increase the length of.

The deflection angle i of the rod b can be realized between 10° and 90°. In order to keep the direction of the rod being advanced constant, two deflection rollers 1 may be used, as shown in FIG. Further, an auxiliary counter roller 1' may be used. Furthermore, as shown in FIGS. 8 to 10, more deflection rollers and corresponding counter rollers can be used. The rod being advanced can be deflected in a Z-shape (FIGS. 7 and 8). Also,
It can also be formed into a loop shape or other combinations.

The deflection devices R, R-, which carry out the respective angular deflection, form respective deflection units F of the rod being advanced.

As shown in FIG. 8, roller straightening units B, B-
Flowers that can be provided.

To prevent bending effects from each roller deflection device R, at least one straightening roller 2 is placed behind the deflection device R. The position of this straightening roller 2 can be adjusted in order to straighten the rod. In the direction changing unit of the embodiment, as shown in FIG.
One deflection unit F is located in the horizontal plane and the other deflection unit F' is located in the vertical plane and operates in pairs.

In order to avoid displacement of the rod b being advanced, a guide bar unit 3 is placed between one roller deflection device R and the other. This reinforces the adjacent continuous arm guide lever L. As shown in Figure 10, the first deflection device changes the angle of deflection depending on whether the supply from the coil is from the left or right, and whether there is one or two rods. It is movable for. The device of the invention in the embodiment shown in FIG.
The path of the rod being advanced on the first working plane W is angularly deflected, and the deflection angle is from 10' to 90'.
It is desirable that the setting is between 2° and 2° along the side of the triangle between each deflection angle.
A first group of deflection devices for the forward-feeding rods realizing said arm lever by a roller guide device c, c' constituted by a set of oppositely arranged rollers and said rollers. A forwarding roller device @C for advancing the rod placed at the apex angle created by the guide device, and for redirecting the forwarded rod onto the working line parallel to the working plane. a redirection device e placed behind the second roller guide device;

A second working plane W' is located behind the first working plane W and in a plane perpendicular thereto and parallel to the forward working plane W, and during each deflection angle, the rod working Redirection for angularly redirecting the first roller guide device installed at an angle with respect to the line and the rod that is further advanced backward thereto to the advancing work line parallel to the plane W-. a device e- and opposed rollers arranged behind said final redirection device e- and used for angularly redirecting the rod to said working line; It consists of a roller rearrangement device m that can adjust the position of the rollers.

The first working plane W is horizontal or approximately horizontal, and the second working plane W- is vertical or approximately vertical. The first roller guide device C, which is placed between the deflection angles, can adjust its inclination in order to change the deflection angle up to 900 degrees.

The upper series of rollers 13 of each roller guide device c, c', c'' are arranged obliquely to one side during the deflection angle, and the rollers 1 are arranged alternately on the opposite side.
2, the pressure can be adjusted by a manual control device 4.

The rollers 12.13 provided on opposite sides forming the roller guide devices C, C', C'', the redirection devices @e, e- placed behind them, and the roller rearrangement device m has a groove for trapping the rod b that is being fed forward.

The locking groove of the roller has a figure 7 shape with an angle that allows work to be performed within a certain range of the rod radius p.

The forward feed roller device C is realized by a pair of rollers located on opposite sides, and at least one of the rollers 6
The pressure on the roller 5 on the opposite side can be adjusted.

Two sets of advance roller arrangements can also be provided to reduce the pressure applied to the rod.

The rod roller redirection devices e, e' consist of a pair of anvil rollers 8,8' with an internal deflection angle and a pressure-adjustable roller 7 on the opposite side.

18 DEG of the rollers constituting the anvil roller are surrounded by the upper rollers in the inclined roller guide devices C, C''.

This example is for illustrative purposes only and is not intended to limit the invention. That is, this invention can be modified and implemented in any way without departing from its spirit or essence, and its scope is limited only by the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional stirrup device, Fig. 2 is a side view of a conventional twisted stirrup, Fig. 3 is a perspective view of a twisted stirrup, and Fig. 4 is a drawing of the raw material rod or wire in tension. Figure 5 is a cross-sectional view of the rod sandwiched between two rollers to illustrate one of the causes of rod rotation during forward feeding; Figure 6 shows the continuous arm lever applied to the rod being advanced;
Figure 0 shows various other embodiments; Figure 11 is a schematic perspective view of a device that can be provided between the unwinding coil and the stirrup or straightening device (not shown);
FIG. 12 is a schematic cross-sectional view of the rod being fed forward while being sandwiched between a pair of grooved roller guide devices placed on opposite sides. w, w'...Working plane L...Arms are idle levers c, c', c''...Roller guide devices e, e'...
・Redirection device

Claims (2)

[Claims] (1) A device for preventing the rotation of a longitudinally advanced rod or wire, especially in straightening or final bending devices, which is unrestrained or driven. At least one roller guide device (C, C', C'') is provided for guiding the rod being advanced by the roller deflection device in the form of a series of bent arm guide levers (L). and said roller guide device for inclined rods is provided along the working line of the advancing rod or wire on at least one side of each deflection of the angularly deflected advancing rod. A device for preventing rotation of a rod or wire being advanced, characterized by: (2) On the first working plane (W), the first group of deflection devices, which is realized by a roller guide device of two inclined rods, is arranged at the angle of the path of the rods being advanced. The direction is changed and the direction change angle is 10°.
A roller guide device (C, C') for a series of arm levers of each rod set and angularly deflected from 90° to 90° is provided along the sides of the triangle between the deflection angles; A redirection device (e) is placed after the second inclined roller guide device (C') for angularly deflecting the rod being advanced again onto the forward work line parallel to the working plane. Then, on a second working plane (W') parallel to the forward working line and placed behind and perpendicular to the first working plane (W), another inclined rod is A roller guide device (C″) is provided and a rod redirection device (e
2. A device for preventing rotation of a rod or wire being advanced as claimed in claim 1, characterized in that a rod or wire is placed behind it.