WO1995006532A1

WO1995006532A1 - Automatic bar feeding device

Info

Publication number: WO1995006532A1
Application number: PCT/EP1994/002616
Authority: WO
Inventors: Claudio Bernardinis; Carino Zebelloni
Original assignee: Claudio Bernardinis; Carino Zebelloni
Priority date: 1993-08-30
Filing date: 1994-08-06
Publication date: 1995-03-09
Also published as: ITUD930169A0; IT1262186B; ITUD930169A1; EP0674553A1; AU7611594A; ZA945988B; EP0674553B1

Abstract

This invention is concerned with an automatic feeding device for bar and/or metal rods for plants electrowelded normal or special meshes, shaped as per drawing, having its main characteristic to position at a required distance one or more pieces of said bars and/or rods. Device allows unilateral introduction continuous or by spaced pieces, transversally to the feeding sense of mesh construction. Continuous rod (1) is pushed by a bidirectional training device (2) and cut (1.1) to measure by the automatic shear (3), afterwards it is pushed through suitable gauged elastic guides (4), with the edge of the new bar against the end side of the previous bar (1.1), into required position on working surface.

Description

1. Description of the Patent entitled:

"AUTOMATIC BAR FEEDING DEVICE"

— O —

This invention is concerned with an automatic feeder for bars and/or

5, metal rods on machines for the production of electrowelded mesh making

plants having its particular feature to position, at a requested distance,

one or more pieces of said bars and/or rods.

Device allows unilateral continuous introduction of bars, bars are

continuous or in pieces, on their own positioning level, likewise for a

0_# bilateral positioning we need to have two devices which are opposite in

position and in function.

Invention permits to build in automatic and quickly special electrowelded

meshes (with orthogonal links) having general shapes with different

geometrical shape, partial local reinforcements, empty spaces or project 25 interruption.

At technical's state of things in case of construction of irregular

electrowelded mesh construction that is on project drawing we operate manually and/or automatically on electrowelded normal mesh by cutting

parts which are to be cut off and eventually add reinforcements partially.

2_Q This, besides forming a number of wastes and having a large spaces to

work, this resulted not much economic because such operations need a

long time and modifications influence on the unit price of product.

Therefore, we thought to make an automatic feeding device for bars

and/or rods continuously to be applied on welding machines for !• electrowelded mesh, this allows to position in any point in the lateral orthogonal sense, according to the feeding sense of mesh, one or more bars of equal or different length. This way, besides avoiding staff

intervention (therefore time and cost reduction) avoiding wastes because

5- we only use the necessari bar.

As mentioned, device is driven automatically therefore is capable to operate on project drawings.

According to this invention, feeding device is composed by: a bar or

metal rod training device, automatically driven suitable to operate in both

10. senses (feeding and return); a cutting device; a sequence spaced of a

plurality of lined up guides opening by command and a plurality of levers

or carriers for the positioning under the welding device of said bars or

pieces of rods.

Mechanical combination permits to position bars or pieces in a continuous

15. or spaced mode, automatically, by acting in synchrony and or in progression

between all the parts mentioned.

As a matter of fact, supposing that straight bar used comes from the unwinding of continuous metal wire coil, function sequences (in a possible

solution) of the combination are the following: the training device,

20. bidirectional, feeds up bar of required size, through the spaced guides;

afterwards, cutting device make the cutting to measure (if of total

dimension, bar will be placed under the welding unit, if of partial dimension

it will need to be moved straight according to drawing); for the rectilinear

positioning of the piece entrainer at double rotation sense comes into action, 1. the edge of the new bar pushes forward the end of the piece by means of

special guides, gauged and elastic, until reaching the position required

and avoid any uncontrolled moving of said piece; then, entrainer inverts

rotation sense and takes the new bar while the piece of wire remains still

5. into the reached position; entrainer takes totally or partially the new bar

of said size equal to the positioning distance space between both bars;

afterwads the cutting device comes into action and cuts the bars; now,

previous phase will be more or less repeated until reaching the rectilinear

definitive positioning of bars according to drawing; in conclusion, orthogonal

10. carriers come into action automatically which move, from the opening

guides (subject to springs) to the welding device bars positioned (we will have the union of lateral bars of this invention with the longitudinal ones fed by other machines).

A first variation to this invention is concerned with the possibility to

15. adjust the dimension of diameter of bars of automatic training device and

the possibility to use opening guides, spaced, rectilinear, invertable of

the same or of different diameter and/or opening guides having more

parallel housings of a same or of different diameter.

A second variation to this invention is the possibility to make the whole

20. feeding combination moble in order to position under command the rods

or wire pieces in parallel on a construction level of mesh.

A third variation to this invention is concerned with the possibility to

use the feeding device in couple, in contrast, on the same line or on parallel

lines in order to operate for the construction of large electrowelded meshes. 1" A forth variation to this invention is concerned with the possibility to

make many electrowelded side by side meshes previously cut, as a matter

of fact feeding device can cut, push and position many rod pieces on the

same trajectory, each one of them will be part of a single electrowelded

⁵- mesh.

Above mentioned characteristics will be better understood and pointed

out while other will appear from the following detailed description of a-

non limited realization example, in the four attached drawings, in which:

- Fig.l shows a plan view a special electrowelded mesh, with orthogonal !0« links, shaped, with empty spaces and eventual local reiforcements according to drawing;

- Fig.2 shows a side view of bar positioning device into welding zone pointing

out movement of the carrier from release opening guide;

- Fig.3 shows a schematic front view of the training device, the cutting

15. and the guides pointing out the first work phase, to be the cut of a piece

of bar;

- Fig.4 shows a front view, as per Fig.3, the second work phase that is the

pushing of the piece of wire with the new bar through the spaced guides

until reaching requested position;

20. - Fig.5 is a front view, as per Fig.3 and 4, of the third phase that is the

call back of continuous bar leaving the piece in position;

- Fig.6 is a front view, as per Fig.3, 4 and 5, of the fourth phase consisting

in the cut to measure of the second piece of wire on the same direction

(for example x-coordinate); 1- - Fig.7 shows a front view, as per Fig.3, 4, 5 and 6, the fifth phase, that

is, the pushing of the second piece of wire with the edge of the new bar;

- Fig.8 shows a front view, as per previous Fig.3, 4, 5, 6, and 7, the sixth

phase, of call back of the new bar leaving in position the second piece of

5. wire. The following phase will be the positioning of the first and the second

piece under the welding device. Besides, the drawing points out an example

of electrowelded mesh composed by discontinuous bars and spaced in order

to form an empty space.

According to the invention and in conformity with a realization mode

10. of the automatic feeding device of bars or steel rods in a continuous mode, coming from a skein or coils, it includes an automatic entraining device

(2), adjustable in order to operate on different diameters of wire and to

push it in both directions: frontwards and backwards. Following is the

automatic cutting device (3) which cuts to measure rods of any length,

15. of maximum dimension possible for machine or partial pieces. Following

is a set of special guides (4), spaced, and elastically half-moon opening,

with two holes of different diameter for the passing of relevant steel rods.

They are interrupt and spaced to permit the action of lever or carrier (6) orthogonal to the wire feeding, these move and position wire under the

20. electrodes of the welding device (7) which will link wire (1.1 - 1.2) to the

orthogonal wire (8) already present as a mesh component.

The whole feeding device is capable to cut to measure wire (1.1 - 1.2)

and to position it at a requested distance making it pass through the holes

of the opening guides (4), through the push of the edge of rear wire (1) . on the edge of the cutted wire (1.1). Once such position is reached entrainer calls back wire (1), leaving wire (1.1) in position, and waits for the next

cut to measure (1.2) on the same line or for a new line, positioning operation

is repeated as already described with the particularity that second piece

5_# can be positioned distant from the first, on the same line, leaving space

according to drawing. After this, carries (6) come into action by moving

them under the electrodes for the effective welding.

Afterwards, cycle will be repeated following the construction of mesh

according to the drawing.

0 Mesh which may be normal or elaborated with perimetric and inner

shapings, for example empty spaces (5) local reinforcements (1.1 and 1.2).

15.

20.

25.

Claims

^{1 #} C L A I M S

1st. Automatic feeding device for bars, particularly suitable for the

construction of electrowelded meshes shaped according to a drawing whose

particular feacture is that of including different mechanical devices

automatically commanded through program, in sinchrony and/or progression

in order to place bars and/or straight metal rods coming from skeins or

coils, of. variable length, at required distances in a continuous or

discontinuous mode, on a work level or transversaUy to the forming sense

of the electrowelded meshes.

10* Said feeder is composed by: an entraining (2) for continuous wire (1) or bars capable to operate in both directions (frontwards or backwards);

a cutting device (3), also adjustable in the feeding direction of wire, for

the cutting to measure of rods; a set of special guides (4), gauged and elastic, keeping rod movement under control, straight and spaced, having

15. one or several passing holes relevant to rods and formed by two opening

parts, in order to permit orthogonal movement of wires (1.1 - 1.2) through

carriers (6) which place them under the welding device (7) to be linked

with relevant rods (8) orthogonal composing mesh.

Positioning of entire or pieces of rods (1.1 - 1.2) at required distances,

20. is made through the push of the edge of rod piece with the head of new

bar, moved forward by entrainer, through passing holes of opening guides

(4), which simply hold it and keep it always stopped in to the position

required. Afterwards, entrainer inverts motion and calls beck new bar

leaving previous piece of rod in position for a new cycle (which can be 1. on the same trajectory or line in continuous or leaving spaces, or on a new

line).

2nd. Feeding device according to the first claim is characterized by

the fact that entrainer abive operating automatically in both directions,

5. frontward and backward, is adjustable, consequently it can operate on rods having different diameter.

3rd. Feeding device according to one or several previous claims is

characterized by the fact that guides, with one or several passing holes

of different or of same diameter, anyhow gauged in order to stop bars,

10. are made in two parts one of which can be lifted in order to permit lateral output, that is orthogonal to the passing hole direction and to the rod

feeding direction.

4th. Feeding device according to one or several previous claims

characterized by the fact that it operates laterally, transversaUy to the

15_# feeding direction of mesh construction, and can be made fix or moble

operating unilateraly or also side by side, at variable or fixed distance,

in order to operate parallelly under independent command.

At last, in case of large construction of electrowelded mesh operate

on the same line in contrast. 2_Q 5th. Feeding device according one or several previous claims

characterized by the fact that it is capable to pre-cut electrowelded

meshes, because it can feed transversaUy several pieces of rods, one after

the other, on the same trajectory. Consequently mesh, composed by

transversal and longitudinal rods, once welding is over, will be interrupted, 1. already cut in stripes side by side.

6th. Feeding device according to one or several previous claims

characterized by the fact to be suitable for machines producing metal electrowelded meshes, normal or shaped, and on other machines operating

5. on metal wires or rods as for example stirrup machines or bending machines

for building purposes and selectioning units for rods of different length.

10.

15.

20.

25.