JPH03212319A - bondage device - Google Patents

Abstract

PURPOSE: To clamp elongated articles from a relatively spacious place and bundle them by providing a second swingable tensioning arm having contact members engaging holding elements from the outside of a loop respectively and tightening the loop by first and second arms while crossing each other during the swinging movement. CONSTITUTION: A ling chain 11 as an elongated flexible holding element has a tendency to freely hang down like a loop along a catenary curve through guide wheels 9, 10, 14, 15. Respective groups 20, 21, 22, 23 are bundles of reinforced concrete bars, for instance. The pistons of two piston cylinder devices 7, 8 are drawn out of the cylinders and two tensioning arms 3, 4 are rotated around the axis 5 to cross each other. Both guide wheels 9, 10 transfer on the conveyor roller 16 in the full width thereof. The link chain 11 is moved by these two guide wheels 9, 10 to form a loop of the chain 11 and surround the bundle groups 20, 21, 22, 23 and tighten them. When the pistons are drawn further, these bundles are gathered together and a large bundle 25 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for bundling a number of elongated rod-shaped products, for example copper-iron rods.

The present invention can be summarized as follows: an elongated flexible element (
The present invention relates to a binding device for gripping and bundling elongated products (20 to 23) consisting of 11). - a pair of swingable tensioning arms (3, 4) each from the outside of the loop said gripping element (11);
) has a contact member (9, 10) that meshes with the contact member (
9, 10) oscillate in a path formed around the axis (5) in such a way as to press on the gripping element while moving over the area and jointly perform a tightening action on the loop. The swing paths of the arms are arranged such that the arms can intersect each other during the swing movement.

It is a known method to tie elongated objects, such as concrete reinforcing bars, together into bundles. This method involves manually or mechanically threading wire around a number of rods, tying the wire and tying as tight a knot as possible in the wire to hold the bundle together.

When tightening the wire, the binding wire performs the function of a gripping device, which must permanently conform to the shape of the bundle being made. For this purpose the wire must be flexible. The knot must not come loose when the bundle is subsequently handled. For this purpose, the wire must be rigid (not permanently deformed). Because of these contradictory requirements for bondage wire, a compromise must be made somewhere, so in practice it is It does not hold its shape or its bound state.

German patent A-1511826 first describes a restraining device in which a chain was rolled into a loop under a steel rod collected in the machine, and a U-shaped swinging arm pushed the chain. ing. The end of the arm pushes the chain above the bar, so
Sticks are picked up and bundled. The purpose of this is to reduce friction and keep the bundle well-rounded.

No. GB-A-1574349 discloses a method in which two C-shaped arms are oscillated to push each chain across the top of a bundle of rods;
A device for tightening the bundle is shown.

GB-A-1358472 describes a device with two swinging arms which push the sides of the loops of the chain towards each other to form a bundle.

However, no suitable proposal has been made in the prior art for collecting and bundling rods from a large area, as is required, for example, when transporting steel rods to a restraining device on a roller bed. In this case, it is desirable to omit the step of initially collecting the rods into the gutter. A secondary problem is the need to avoid contaminating the movable parts of the restraint device with dust and rust from the rod.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a restraining device for picking up elongated objects from a relatively wide area and bundling them together.

According to the invention: (a) an area for conveying and bundling elongated rod-shaped products; (b)
an elongated flexible gripping element suspended to form a loop at least partially surrounding the area; (c) from a pair of swinging tension arms having contact members that engage the gripping element from outside the loop; and each arm is swingable about an axis such that the contact member moves over the area and simultaneously pushes the gripping element, whereby the contact member jointly moves the loop. A binding device for gripping and bundling a number of elongated rod-shaped products, which performs a tightening action around the products to be bundled, and the swinging path of the arm is arranged so that the core arms can intersect with each other. is provided.

Preferably an elongated flexible element, such as a chain, is fixed at both ends to the frame of the device.

The invention is based first on the concept that the operations of gripping and bundling the elongated products and of bringing the bundles together into a larger bundle are preferably carried out in two separate devices.

The system consisting of the frame, the two swinging arms and the flexible element constitutes a closed path which can change shape and constitute a substantially flat surface, i.e. a gripping surface. can. An elongated product, such as a concrete reinforcing bar, is fed laterally to the gripping surface through this closed path. By appropriately rotating the arm, the area enclosed by this closed path is reduced and the product is gripped and bundled.

An advantage of the restraint device of the invention is that it can be made from a small number of individual simple elements.

Another advantage of the restraining device of the invention is that it has a small number of moving parts and is suitable for use in an industrial environment. Furthermore, the movement of the movable member is simple and therefore the operating mechanism of the restraining device is also simple.

The binding device of the present invention is suitable for use in a binding device in which a binding wire is passed around a gripped bundle to form a knot. Since the tying device of the present invention is capable of gripping and bundling elongated products, the tying device of the present invention is less demanding mechanically and in terms of time.

By intersecting the two swinging arms above the restraint area, it is possible to pick up products from a wide area. The invention is therefore particularly suitable for collecting and bundling products on a flat surface, for example a conveyor platform.

In a preferred embodiment of the restraint device of the invention, the amount of rotation required can be reduced by rotating the two arms about the same axis. This embodiment is also structurally simple.

In a particularly preferred embodiment, the pivot axis or common axis of the pivot arm is located above the clamping area, for example directly above the area where the products to be bundled are collected. This prevents the rotating mechanism from becoming dirty due to dust and rust from the bundled products, allowing for better maintenance. The flexible element can take the form of a wide free catenary to collect the product over a wide area.

As mentioned above, the frame, the first and second swing arms, and the gripping element follow a closed path in the gripping surface. The elongated product is fed into the restraining device from a direction transverse to this gripping surface. In some applications, the size of the feeding cross-section of this closed path, ie the binding area for feeding an elongated product, may be inadequate when the binding device is in the rest position.

In order to increase the width of the restraint area, preferably at least one of the swinging arms is fitted with a guide which pushes the flexible gripping element from inside the loop when the swinging arm is in the open position. .

Preferably, the swinging arm is small (at least in a straight line between its pivot axis and the push member contacting the elongated flexible element).

The book will now be illustrated with reference to the accompanying drawings, but the invention is not limited to these embodiments.

FIG. 1 shows a restraining device I consisting of a frame 2 in the form of a gate or grid, a first oscillating tensioning arm 3 and a second oscillating tensioning arm 4. FIG. Each end of tension arms 3 and 4 is attached to frame 2
is connected to a support 6 of the arm 3.4, which arm can freely rotate around an axis 5 common to the two arms 3.4. Between the frame 2 and each tension arm 3.4 there is a piston-cylinder arrangement 7.8. Both piston-cylinder devices 7.8 perform a dual action. Appropriate piston
The operating elements of cylinder devices are generally known and will not be described further.

A guide wheel 9 is attached to the outer end of the tension arm 3,
A guide wheel 10 is attached to the outer end of the tension arm 4. The branch arm 14.15 further has a guide wheel below the guide wheel 9.10. An elongated flexible gripping element in the form of a link chain 11 is attached at both ends to each support 12 and 13 of the frame 6. Link chain 11 passes over guide wheels 9.10 and 14.15. The link chain 11 has a tendency to hang freely in a loop according to the shape of the catenary line. Guide chain9.
10 pushes the chain 1 inward from the outside of the loop. The two guide arms 4 and 15 press the link chain 11 outwards below the guide wheel 9.10 and the element 6.3.14.11.15 at the location of the rollers supporting the products to be bundled. The area surrounded by and 4 increases. Each guide wheel 14 and 15 consists of a rod-shaped element, on the side of which a slider is attached, spaced from the tension arm, on which the link chain slides.

Roller 16 is the roller of the feed conveyor for partial bundles 20, 21, 22 and 23. Each partial bundle 20゜2
1.22 and 23 are themselves bundles of e.g. reinforced concrete bars. The four partial bundles must then be combined into a larger bundle 25 as shown in FIG.

To make a large bundle 25, the pistons of the two piston-cylinder devices 7.8 are pulled out of the cylinders and
rotating the two tension arms 3 and 4 about an axis 5;
Cross over as shown in FIGS. 1 and 2. Both guide wheels 9,10 move over the conveyor rollers 16 over substantially their entire width. These two guide wheels 9.1 (l move the link chain 11 and move the partial bundles 20.21.22
Make a loop of the chain 11 around and 23 and tighten it. When the piston is withdrawn further, the partial bundles are bundled together and a new larger bundle 25 is created. The desired gripping force on bundle 25 is achieved by extending the piston of the piston-cylinder combination outward to a certain position. After the strapping wire has been wrapped around the thick bundle 25 in a manner known per se, the piston is pulled back towards the cylinder and the strapping device returns to the position shown in FIG.

The main features and aspects of the invention are as follows.

1. An elongated flexible gripping element (11) suspended so as to form a loop at least partially surrounding the area for carrying and bundling the elongated rod-shaped products, a contact engaging the gripping element from outside the loop; It consists of a first swinging tension arm (3) having a member (9), which arm is connected to an axis (5).
, whereby the contact member moves over the area and simultaneously presses the gripping element (11) to tighten the loop around the products to be bundled. Grasp the products (20 to 23) and bundle them (25
), further comprising a second swinging tensioning arm (4) with a contact member (10) engaging the gripping element (11) from outside the loop, the second arm Similarly, the contact member (
10) is adapted to press the gripping element while moving over the area, the first and second arms (3, 4) intersecting during their oscillating movement to tighten the loop; .

2. A restraining device according to claim 1, which has a frame (2) and in which the gripping elements (11) are fixed to the body at both ends.

3. The first and second arms (3, 4) have a common axis (
5) The binding device according to item 1 or 2 above, which is capable of swinging around.

4. At least one of the first and second arms (3, 4) engages the gripping element (11) from inside the loop, increasing the width of the loop before tightening the loop; The bondage device according to item 3.

5. The pivot axes (5) of the first and second arms are located above the area for carrying and bundling the products.
4. The bondage device according to item 4.

6. The binding device according to any of the above items 1 to 5, wherein at least one of the first and second arms (3, 4) is linear.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the binding device of the present invention in an initial rest position, and FIG. 2 is a schematic diagram of the device of FIG. 1 in a position for gripping and bundling bar-shaped products.

Claims (1)

[Claims] 1. An elongated flexible gripping element (11) suspended so as to form a loop at least partially surrounding the area for carrying and bundling the elongated rod-shaped products, and interlocking with the gripping element from outside the loop; It consists of a first swinging tension arm (3) with a contact member (9), said arm being able to swing about an axis (5), whereby said contact member moves above said area. , in a binding device for gripping a number of elongated rod-shaped products (20-23) into a bundle (25), simultaneously pressing the gripping element (11) so as to tighten the loop around the products to be bundled; a contact member (10) that engages the gripping element (11) from outside the loop;
a second oscillating tensioning arm (4) with a second oscillating tension arm (4) which also oscillates about an axis (5) and whose contact member (10) moves above the area. and simultaneously pressing the gripping element, the first and second arms (3, 4) intersecting during their rocking movement to tighten the loop.