CH719084A2 - Device for bending or unbending a rebar or a wait bar. - Google Patents

Abstract

The invention proposes a device for folding or unfolding a reinforcing bar, in particular a waiting bar included in a box or a waiting box. The device comprises a tubular head (1) comprising an interior space and an opening (2) arranged along the tubular head (1) and intended to receive the reinforcing bar and an actuating bar (3) fixed to the tubular head (1) so as to form an angle (A) relative to the tubular head, the actuating bar (3) being aligned relative to a longitudinal axis of symmetry of the tubular head (1).

Description

Field of the invention

The present invention relates to a device or a hand tool in the field of construction.

More particularly, the present invention relates to a device or a tool or a hand tool for folding and unfolding one or more reinforcing bars so that they adopt a desired position. The present invention is particularly suitable for folding and unfolding waiting bars included in a box waiting box.

The present invention also makes it possible to remove the cover of a waiting box after concreting in order to expose the waiting bars contained in the box.

State of the art

[0004] A rebar, or rebar, is a steel bar used for reinforcing concrete (reinforced concrete) or masonry (reinforced stone). It is normally made of low carbon steel, and may have a ribbed surface to improve its adhesion to concrete.

[0005] In order to ensure correct reinforcement of concrete structures, the reinforcing bars must most often be bent into a desired conformation imposed by the structure.

[0006] Waiting boxes are used in concrete structures where continuous reinforcements are required and where, for implementation reasons, these reinforcements cannot be produced in a single phase. The box can then be simply affixed or fixed to the formwork. After concreting, the lid of the waiting box is removed and the waiting bars contained in the box are unfolded in a protruding position so that the latter are covered with reinforcements from another concrete structure, thus ensuring a connection between the structures and increased resistance.

[0007] The unfolding or folding of the reinforcing bars or waiting bars are usually carried out using a hammer-chisel, a crowbar, a crowbar. However, such methods involve a risk of injury to the user, in particular of cutting or impaling. In addition, these methods can lead to wasted time and physically strenuous manipulations. Finally, it is possible that the waiting bars contained in the waiting box or the rebars do not offer sufficient space around them allowing the insertion of a hammer-chisel, crowbar or crowbar

[0008] On the other hand, the device according to the invention overcomes all these drawbacks.

[0009]There is therefore a need to allow the folding and unfolding of reinforcing bars or waiting bars quickly, requiring less force and energy for the user and minimizing the risk of injury.

Summary of the invention

The present invention overcomes the problems mentioned in the previous chapter and relates to a device for folding or unfolding a reinforcing bar according to claim 1 or folding or unfolding a waiting bar included in a waiting box.

Other advantageous features of the invention are indicated in the dependent claims.

Description of figures

Other characteristics and advantages of the present invention will appear more clearly on reading the detailed description which follows from the embodiments of the invention given by way of non-limiting examples and illustrated by the appended drawings in which: FIG. 1 represents a front sectional view and a side sectional view of an embodiment of the device according to the invention in which the device consists of a single piece; FIG. 2 represents a front view of an embodiment of the device of the invention in which the lever arm is removable; FIG. 3 represents a front view of an embodiment of the device in which the lever arm is removable; FIG. 4 represents a front cross-sectional view and a side cross-sectional view of the device according to the invention, comprising a head of the double-slit device; and FIG. 5 represents a front view of an embodiment of the device comprising a force beak.

Detailed description of the invention

The invention provides a device for folding or unfolding a reinforcing bar.

The device may be intended for folding or unfolding a waiting bar included in a box or a waiting box.

The device comprises a tubular head 1 comprising an interior space and an opening 2 arranged along the tubular head 1 and intended to receive the reinforcing bar.

[0016] The tubular head 1 comprises a tube geometry, for example a cylindrical, rectangular or square tube.

The tubular head 1 comprises a length and a width or section, the length being greater than the width or section.

[0018] In addition, the tubular head 1 comprises a longitudinal axis of symmetry extending along the length of the tubular head 1.

[0019] The tubular head may comprise a material offering high mechanical strength. This material can be a metal such as steel, hardened steel or any other suitable metal.

[0020] The tubular head 1 can be a steel or hardened steel tube.

The tubular head or the actuating bar can be formed by rolling, pressing, stamping, cold bending.

[0022] Alternatively, the tubular head or the actuating bar can be formed by rolling, pressing, stamping, hot bending.

The tubular head or the steel tube 3 will have, for example, a dimension of the order of 100 mm in length or at least 100 mm in length.

[0024] Depending on the diameters of the reinforcing bars or the waiting bars, the dimensions of the space of the tubular head 1 as well as of the opening 2 must allow the insertion of a bar in this space by the opening 2. The dimensions of the opening must be defined according to the diameter of the rebar or waiting bars intended to be inserted into the device.

The diameter of the tubular head 1 can be between 4 and 20 mm or even more depending on the user's request and the diameter of the waiting or reinforcement bars.

[0026] In addition, the waiting box manufacturers all respect a distance between each bar. The head of the device must therefore respect a length less than this spacing. The outer diameter of the tubular head 1 can be between 10mm and 25mm, for example 21mm.

The device further comprises an actuating bar 3 fixed to the tubular head 1 so as to form an angle A with respect to the tubular head1.

[0028] The actuating bar 3 can be arranged to be aligned with the longitudinal axis of symmetry of the tubular head 1.

[0029] The actuating bar 3 can be arranged to extend so as to form a non-zero angle between the actuating bar and the longitudinal axis of symmetry of the tubular head 1. Preferably, the actuating bar 3 extends in a direction opposite to the side of the tubular head 1 comprising the opening 2.

The angle A can be between 20° and 90° or be equal to 45°, thus ensuring the user.

Fixing the head of the device with the lever arm can respect a precise angle of 45°.

[0032] The 45° angle makes it possible to minimize the unfolding and folding actions, however the angle can be made from 20 to 90°. Depending on the length of the head of the device and the diameter of the waiting bar, the connection of these two elements should be adapted.

Referring to the drawing in Figure 1, the device comprises a tubular head 1 or a steel tube 1, an opening or a slot 2 is formed on one side of the steel tube. An actuating bar 3 or a second steel tube 3 is fixed thereby forming a lever arm. The device allows a user to insert a reinforcing bar into the space of the steel tube through the slot 2 and to bend or unfold this reinforcing bar thanks to the lever arm formed by the actuating bar 3 and the steel tube 1.

[0034] The lever arm or the actuating bar 3 may comprise a thickness, a diameter and a measurement calculated to multiply the force exerted by the user.

[0035] The thickness of the actuating bar 3 can be 2 mm or more.

[0036] The length of the actuating bar 3 can be defined in order to obtain a sufficient lever arm for folding or unfolding a rebar or a waiting bar. The force required for folding or unfolding such a bar may depend on the diameter of this bar. Thus the actuation length 3 can be 200mm, 300mm, 400mm, 500mm, 600mm or 700mm. The length of the actuating bar 3 can also be between 100mm and 1000mm or greater than 1000mm.

For example, when the reinforcing bar is 12mm, the inside diameter of the tubular head 1 can be 12mm and its thickness 2mm. The length of the tubular bar 1 can be 100mm or more. The length of the actuating bar can be 500mm.

[0038] The inside diameter of the tubular head or the diameter of the space included in the tubular head is dimensioned according to the diameter of the reinforcing bar or the waiting bar to be received. The diameter can be for example 12mm, 14mm, 16mm, 18mm or more.

[0039] The length of the actuating bar 3 can be variable depending on the diameter of the reinforcement bar or the waiting bar to fold or unfold.

[0040] The actuating bar 3 can be arranged so that the opening 2 of the tubular head 1 is arranged laterally when the actuating bar is on top of the device as shown in Figures 1 to 5.

[0041] The actuating bar 3 can be arranged substantially in the middle of the length of the tubular head 1.

According to one embodiment of the invention, the actuating bar 3 can be removably mounted on the tubular head 1.

The actuating bar may comprise a first part 3 fixed to the tubular head 1 and a second part 6 removably fixed to the first part 3 as shown in Figures 2, 3 and 5.

The second part 6 can be fixed to the first part 3 using fixing means such as pins. In this case, orifices 7 are arranged on parts 3 and 6 as shown in Figure 5.

The first and the second part can be fixed by screwing as described in Figure 3 or using magnet allowing the maintenance of the two parts together.

In this variant of the invention where the device is in two removable elements, the user can thus use the same lever arm or the same actuating bar 3 for several heads of the device while respecting safety standards. informed by the builder and depending on the size and diameter of the rebars or waiting bars.

According to variants not shown, the attachment between the second part 6 or the lever arm 6 and the first part 3 or the steel tube 3 can be made with other systems allowing the connection.

[0048] The device may also comprise a reinforcing element 4) configured to mechanically reinforce the attachment of the actuating bar 3 to the tubular head 1.

[0049] The reinforcing element 4 can be of triangular shape comprising a first side in contact with the tubular head 1, a second side in contact with the actuating bar 3 and a third protruding side, configured to open a cover of a waiting box.

This reinforcing element can be a steel part forming a right triangle 4 shown with the letters A, B, C in Figures 1 to 5, the side opposite the angle A is salient or acute, allows both the opening of the waiting box, the reinforcement of the fixing of the tubular head 1 and the actuating bar 3 and to respect a desired angle A, for example 45°.

[0051] The dual function of the protruding triangular part 4 or of the reinforcing element 4, combined with the length of the head of the device 1 and of the lever arm 3 are such that a slight pressure exerted by the user on the lever arm 3 is geared down and makes it possible to unfold or fold the waiting or reinforcement bar.

[0052] Waiting boxes can include a cover or a cardboard box, PVC fixed to the waiting box by metal fasteners such as ribbons or metal wires. The projecting, sharp or sharp side of the reinforcing element 4 allows, after insertion of the tubular head 1 in the cover or between the fasteners and the cover, to cut or break the fasteners of the cover or box of the waiting box allowing thus its openness.

In the embodiment Figure 2 and 3, the head of the device consists of two steel tubes 1 and 3 and the triangular part 4 representing a single element.

[0054]According to a variant of the invention, the device may comprise two tubular heads 1, each tubular head 1 comprising an interior space and an opening 2, the openings 2 being opposite one another as shown in FIG. 4.

The head 1 of the device shown in Figure 4 may consist of a double slotted head 1 which can be produced by different methods. The head of this type of device can be of one or two elements.

The steel tube 1 can be made with a slot 2 fixed at 5 with both a steel tube 3 representing part of the lever arm 6 and the triangular part 4.

The steel tube 3 will have, for example, a dimension of the order of 100 mm in length, this length should be taken into account on the final length of the lever arm 6.

In the embodiment of Figure 5, the head of the device 1 and the actuating bar 3 are connected in a single element by welding at 5.

As shown in Figure 5, the tubular head may include a force beak 8 arranged at one of the ends of the tubular head 1.

[0060] The tubular head 1 may include an angular cutout made in 8 which will be called "force beak 8", representing a point, like a crowbar or a chisel allowing the user to disentangle and make a small spacing of the waiting bar in the housing in order to insert it into the tubular head 1 through the opening 2.

The force beak 8 can be an extension of a part of the tubular head 1.

[0062] The force beak 8 can be fixed on one of the ends or on both ends of the tubular head 1.

The embodiment of Figures 2 and 3, constituting to represent the head of the device of three parts 1, 3 and 4 in a single element by molding for example.

The steel tube 1 with slot 2 can also be made with a slot on each side for unfolding and folding the double waiting bars (see Figure 4).

The head 1 of the device can be made up of different characteristics, this cylindrically-shaped contact element has a slot 2 or an opening 2 which can be made on the right or on the left. This same head can be made of a cylindrical bar consisting of a slot on each side (see figure 1,2,3 and 4).

In a variant of the invention, the device comprises a contact element 1 in cylindrical shape comprising a slot 2 allowing access to the waiting bars to unfold or fold them, a lever arm 3 fixed angularly so as to respect an angle A of 45°, in order to carry out the minimum of manipulation and acting as a force-reinforcing member making it possible to multiply the effort exerted by the user. So when the user inserts the waiting bar in the cylindrical element comprising a slot that will be called "the head of the device", he will exert a minimal force using the lever arm fixed to the head of the device. device to unfold or fold the waiting bars to the desired position.

The present invention also makes it possible to perform a 180° rotation of the device by the user in order to avoid removing and then reinserting the wait bar in the tool to unfold or fold the latter.

When the tubular head 1 captures the rebar or waiting to fold or unfold, the latter and for example unfold by the action of the user on the actuating bar. If the bar is to be unfolded additionally or at a different angle, the device can be rotated through a rotation of, for example, 90° or 180° relative to the bar without the reinforcement or waiting bar being output of the tubular head 1. Thus, the user can perform a new action such as traction on the actuating bar allowing the bar to be folded or unfolded in a new direction or more significantly without the bar n has been removed from the tubular head 1 thus improving the safety of the operation and avoiding possible injuries due to the bar unfolded and left unprotected.

It will be understood that various modifications and/or improvements obvious to those skilled in the art can be made to the various embodiments of the invention described in the present description without departing from the scope of the invention defined by the appended claims.

The invention is obviously not limited to the examples illustrated in this application.

Claims (10)

1. Device for folding or unfolding a reinforcing bar, the device comprising: – A tubular head (1) comprising an interior space and an opening (2) arranged along the tubular head (1) and intended to receive the reinforcing bar; And – An actuating bar (3) fixed to the tubular head (1) so as to form an angle (A) with respect to the tubular head, the actuating bar (3) being aligned with respect to an axis of symmetry longitudinal of the tubular head (1). 2. Device according to the preceding claim, characterized in that the angle (A) is between 20° and 90°. 3. Device according to one of the preceding claims, characterized in that the angle (A) is equal to 45°. 4. Device according to one of the preceding claims, characterized in that the actuating bar (3) is arranged so that the opening (2) of the tubular head (1) is arranged laterally when the bar of actuation (3) is located on top of the device. 5. Device according to one of the preceding claims, characterized in that the actuating bar (3) is arranged substantially in the middle of a length of the tubular head (1). 6. Device according to one of the preceding claims, characterized in that the actuating bar (3) comprises a first part (3) fixed to the tubular head (1) and a second part (6) removably fixed to the first part. 7. Device according to one of the preceding claims, characterized in that the tubular head (1) comprises a force beak (8) arranged at one of the ends of the tubular head (1). 8. Device according to one of the preceding claims, characterized in that the device comprises two tubular heads (1), each tubular head (1) comprising an interior space and an opening (2), the openings (2) being opposite the to each other. 9. Device according to one of the preceding claims, characterized in that the reinforcing bar is a waiting bar included in a waiting box. 10. Device according to the preceding claim, characterized in that the device comprises a reinforcing element (4) configured to mechanically reinforce the fixing of the actuating bar (3) on the tubular head (1).