JP2648567B2 - Rebar cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rebar cutting method in which a fixed blade and a movable blade which can be moved in proximity to the fixed blade are displaced in the longitudinal direction of a reinforcing bar disposed between the two blades. Related to the device.

[0002]

2. Description of the Related Art Conventionally, as this type of rebar cutting device,
As shown in FIG. 9, a fixed blade 12 and a movable blade 13 are provided, and the reinforcing bar 1 is disposed closer to the fixed blade 12 than the movable blade 13 in the longitudinal direction of the reinforcing bar 1 disposed between the two blades 12, 13. The first support portion 14 for supporting is provided in a fixed state,
A second support portion 25 (conveyor) for supporting the rebar 1 is provided on the movable blade 13 side from the fixed blade 12 in the longitudinal direction of the rebar 1 and on a side opposite to the movable blade 13 in the rebar radial direction. Some were provided so as not to move vertically.

[0003]

According to the above-described conventional rebar cutting apparatus, the movable blade 13 is lowered in the direction approaching the fixed blade 12 to cut the rebar 1 disposed between the two blades 12, 13. In doing so, the cut-off rebar (cut-off rebar) 1b located on the side of the movable blade 13 from the cutting position rotates clockwise about the second support portion 25 as shown in FIG. There is a danger that there is a problem that noise, vibration, and recovery of the cut-off reinforcing bar 1b become complicated.

Therefore, as shown in FIG. 10, the position of the second supporting portion 25 is set lower than that of a conventional rebar cutting device, as shown in FIG. It is conceivable that the two support portions 25 are unlikely to become fulcrums of rotation. However, in this case, with the lowering of the movable blade 13 at the time of cutting the reinforcing bar, the cut-off reinforcing bar 1b is cut with the fixed blade 12 as a fulcrum while turning in the opposite direction to the clock, and the cut-down reinforcing bar 1b is cut. Has a new problem that the cut surface G tends to be greatly inclined (not a perfect circle) with respect to the axis. However, if the cut surface of the reinforcing bar is greatly inclined with respect to the axis, for example, it is likely to cause trouble during pressure welding work with another reinforcing bar, and it is necessary to perform end face processing as a pre-process of the pressure welding operation. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rebar cutting apparatus which can solve the above-mentioned problems and can cut a rebar in a state where a cut surface is hardly inclined with respect to an axis, while preventing rebound from being cut. There.

[0006]

To achieve this object, a rebar cutting apparatus according to the present invention is characterized in that the rebar cutting device is arranged between the fixed blade and the movable blade in the longitudinal direction of the rebar. On the fixed blade side, a first support portion that supports the rebar is provided, and on the side opposite to the movable blade in the radial direction of the rebar,
And the first support from the movable blade in the longitudinal direction of the rebar.
On the outer side in the opposite direction to the holding portion, a second support portion that supports the rebar movably along the movable direction of the movable blade is provided, and the second support portion is moved with the movable blade being cut with respect to the rebar. Is provided with an evacuation mechanism that allows the movement of the object.

The retracting mechanism may be configured to support the second support portion via a spring that is deformable along the movable direction of the movable blade, or the retracting mechanism may be configured to support a reinforcing bar. When the force exceeds a predetermined value, a fluid pressure support device that receives the second support portion so as to be movable along the contact direction of the rebar may be used.

[0008]

According to the characteristic structure of the rebar cutting device of the present invention, the reinforcing bar is supported on the fixed blade side of the movable blade in the longitudinal direction of the reinforcing bar disposed between the fixed blade and the movable blade. A supporting portion, the movable blade being on the movable blade side in the longitudinal direction of the rebar and on the side opposite to the movable blade in the rebar radial direction, movably along the movable direction of the movable blade. A second support portion for supporting the reinforcing bar is provided, and a retreat mechanism is provided to allow movement of the second support portion along with the movable cutting of the movable blade with respect to the reinforcing bar. It is possible to allow the movement of the second support portion along the direction. That is, since the second support portion can move together with the movable blade while supporting the cut-off rebar (cut-off rebar), the second rebar is supported so that the rebar is not largely inclined with respect to the axis thereof. Parallel movement in the radial direction (or movement in a state close to parallel)
As a result, it becomes difficult for the rotational force around the second support portion to act on the cut-off rebar, and it is possible to prevent flip-up caused by the rebar cutting. Then, the rebar is parallel to (or nearly parallel to) the radial direction so as not to be greatly inclined with respect to its axis.
It can be cut while supporting it in a state where it can be moved, so that it is possible to make a cut surface along the radial direction of the cut-off rebar, and by cutting while bending with the fixed blade as a fulcrum as in the past, The inclination of the cut surface is eliminated.

In addition, if the retraction mechanism is configured to support the second support portion via a spring that is deformable along the movable direction of the movable blade, a simple structure can be used.
The above-described operation can be achieved, and only a small amount of modification is required to the conventional device.

In addition, if the retraction mechanism is constituted by a fluid pressure support device that receives the second support portion so as to be movable along the contact direction of the rebar when the rebar support force exceeds a predetermined value, In a state where the reinforcing bar supporting force does not exceed the predetermined value, the cutting force by the movable blade acts on the reinforcing bar while the second supporting portion can be used as a simple supporting portion, and exceeds the predetermined value (cutting). State), the second support portion can function as a support portion that performs the above-described action, and the set value of the reinforcing bar support force is particularly set within a range that does not cause jumping up. By setting to the maximum value at the beginning of the cutting operation,
It is possible to support the cut-off rebar in a state where there is no bending, and it is possible to achieve more accurate cutting with less inclination of the cut surface.

[0011]

Therefore, according to the rebar cutting device of the present invention, it is possible to cut the cut surface in a state in which the cut surface is hardly inclined with respect to the axis, while preventing the rebound from being jumped up at the time of cutting the rebar. It is possible to perform rebar cutting with high cutting accuracy without generating vibration, and furthermore, it is possible to realize efficient rebar processing work by omitting end face processing of rebar in a later process. Become.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

FIGS. 1 and 2 show a rebar cutting facility A in which a long rebar 1 is cut into a plurality of rebars 1a of a predetermined length and can be collected freely.
The rebar cutting equipment A is a cutting device for cutting the rebar 1 (an example of the rebar cutting device of the present invention) B
And a supply device C that accommodates a plurality of the long rebars 1 and can be supplied to the cutting device B by a predetermined number, and supports the rebar 1 supplied to the cutting device B by the supply device C and Rebar 1 cut by the cutting device B
and a storage device D for storing a.

As shown in FIG. 3, the supply device C feeds the first roller conveyor 2 which can be sent to the cutting device B with the rebar 1 mounted thereon and is drivable, by the respective devices B, C and D.
A plurality of the rebars 1 can be placed along the both sides of the first roller conveyor 2 and the rebars 1 can be placed freely. A mounting portion 3 capable of supplying a predetermined number of rollers to the first roller conveyor 2 from the side is separately provided on both sides of the first roller conveyor 2. The supply of the rebar 1 to the first roller conveyor 2 by the placing section 3 is performed by a chain conveyor 3 a provided in the placing section 3. The chain conveyor 3a is formed so as to be movable along the width direction of the first roller conveyor 2 with the rebar 1 placed thereon.

As shown in FIGS. 1, 2, and 4, the storage device D is capable of being pulled and driven by a predetermined length from the distal end of the rebar 1 sent from the first roller conveyor 2 to the cutting device B. The second roller conveyor 4 is connected to each of the devices B,
A plurality of reinforcing bars 1a of a predetermined length cut by the cutting device B are provided along the both side portions of the second roller conveyor 4 so as to be oriented in the longitudinal direction (drawing direction) in the direction in which C and D are connected. Flexible accommodation sections 5 are separately provided on both sides of the second roller conveyor 4. In addition, for the rebar take-up of a predetermined length, the second roller conveyor 4
A stopper S is provided at the end portion of the rebar transport path, and the transported rebar 1 abuts against the stopper S to prevent the rebar 1 from moving, so that only a predetermined length can be taken. Become.

As shown in FIG. 4, the second roller conveyor 4 is connected to the cutting device B.
A swinging mechanism 6 that can be driven up and down with the end opposite to the side as a fulcrum, and a slide that can be driven close to and away from the cutting device B with the second roller conveyor 4 along the longitudinal direction thereof. A drive mechanism 7 and a transfer mechanism 8 capable of individually transferring the reinforcing bar 1a placed on the second roller conveyor 4 to the two storage sections 5 are provided. The swing mechanism 6
Is formed so as to swing downward in advance when the reinforcing bar 1 is cut, and is configured so that the reinforcing bar 1 does not easily jump up due to the reinforcing bar cutting force. Further, the slide drive mechanism 7 can be used for changing the setting of the length of the reinforcing bar to be cut. The transfer mechanism 8 is provided with a pair of push-up members 9 each having a tapered surface 9a inclined on both sides of the conveyor, and the push-up members 9 are projected from below the second roller conveyor 4 toward the transfer surface. Thereby, the reinforcing bar 1a placed on the tapered surface 9a can be rolled in the inclined direction, and the accommodation portion 5 arranged downstream in the inclined direction can be used.
Can be transferred to

The accommodation section 5 is constituted by a plurality of angle members 10 which are separately provided on both sides of the second roller conveyor 4 so as to be inclined. 1a is configured to be supported and received by the angle member 10 and housed in a predetermined portion.

As shown in FIG. 5, the cutting device B is provided with a lower blade (an example of a fixed blade) 12 fixed to an apparatus main body 11, and an upper blade (an example of a fixed blade) that can be driven to approach and separate from the lower blade 12. An example of the movable blade 13 is provided so as to be displaced toward the accommodation device D in the longitudinal direction of the reinforcing bar 1 disposed between the two blades 12, 13, and at a position closer to the supply device C than the lower blade 12. A first support portion 14 for supporting the rebar 1 is provided;
A second support portion 15 that supports the rebar 1 movably along the movable direction (up and down direction) of the upper blade 13 is provided on the storage device D side from the upper blade 13, and the upper blade with respect to the rebar 1 is provided. A retracting mechanism E is provided to allow the second support portion 15 to move as the cutting 13 moves.

The upper blade 13 is attached to a vertical drive unit 11a of the apparatus main body 11, and the upper drive unit 11a
By driving the lower blade 12 downward,
, And can be cut by applying a shearing force to the reinforcing bar 1 disposed between the two blades 12 and 13.

The first support portion 14 is provided with the two blades 12, 1
It is attached to the apparatus main body 11 so as to be located above the reinforcing bar 1 disposed between the three, and can be supported in a state where the base end side of the reinforcing bar 1 is prevented from floating during cutting.
In addition, the first support portion 14 has a vertically long mounting mounting hole 14.
a is provided (see FIG. 3), and is attached to the apparatus main body 11 through an elongated hole 14a through a mounting bolt, so that the vertical mounting position can be changed and adjusted according to the diameter of a reinforcing bar to be cut. It is composed.

The second support portion 15 is formed of a metal plate, and as shown in FIG.
And a mounting portion 15b of a spring 16 which is an example of the retraction mechanism E is provided on a lower surface portion.
6 is attached to the apparatus main body 11. Therefore, when cutting the rebar 1 sent from the supply device C to the cutting device B and the storage device D, as shown in FIG.
With the lowering of 3, it is possible to allow the rebar 1 to move while being elastically received by the biasing force of the spring 16, and it is possible to cut the rebar 1a to be cut while holding it so as not to be greatly inclined. become able to.

According to the rebar cutting equipment A of the present embodiment, the long rebar 1 mounted on the mounting portion 3 of the supply device C is transferred to the first roller conveyor 2 by the chain conveyor 3a. 1 is sent out to the cutting device B and the accommodating device D by the first roller conveyor 2, and after the tip of the rebar 1 contacts the stopper S of the second roller conveyor 4, the second roller conveyor 4 is moved downward by the swing mechanism 6. The rebar 1 is cut in a state where it does not jump up and is elastically supported by the second support portion 15 so that the cut surface does not incline by merely moving the upper blade 13 after swinging the upper blade 13. It becomes possible.

[Another Embodiment] Another embodiment will be described below.

<1> The fixed blade and the movable blade are not limited to the lower blade and the upper blade described in the above embodiment. For example, as shown in FIG. May be provided along the outer peripheral surface of the blade. In this case, the contact area of the blade with the reinforcing bar is increased, and the local "crushing" of the reinforcing bar occurs. It becomes possible to make it difficult. Further, the fixed blade and the movable blade are not limited to those arranged vertically, for example, are arranged left and right so that the rebar 1 can be cut by the proximity driving of the movable blade to the fixed blade in the lateral direction. Is also good. These are collectively referred to as a fixed blade and a movable blade, respectively.

<2> The retracting mechanism E is not limited to the spring 16 described in the previous embodiment.
When the reinforcing-bar supporting force of the second supporting portion 15 exceeds a predetermined value, a fluid pressure supporting device 17 that receives the second supporting portion 15 so as to be movable along the contact direction of the reinforcing bar 1 may be used. . The fluid used for the fluid pressure support device 17 is as follows:
For example, oil, water, air and the like are mentioned as examples.
The configuration of the fluid pressure support device 17 is, for example, as shown in FIG.
As shown in the figure, the cylinder 1 communicated with the fluid flow path
9 to receive the reinforcing bar supporting force acting on the second supporting portion 15, and the relief valve 20 provided in the fluid flow path, the second supporting portion when the reinforcing bar supporting force exceeds a predetermined value. It may be configured to allow 15 movements. These are collectively called an evacuation mechanism.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is a side view showing a rebar cutting equipment according to an embodiment.

FIG. 2 is a top view showing the rebar cutting equipment of the embodiment.

FIG. 3 is a cross-sectional view of the supply device according to the embodiment, as viewed from the direction in which rebar is fed.

FIG. 4 is a side view showing the storage device of the embodiment.

FIG. 5 is a front view showing the cutting apparatus according to the embodiment;

FIG. 6 is a front view showing a cutting state by the cutting device of the embodiment.

FIG. 7 is a perspective view showing a blade according to another embodiment.

FIG. 8 is a conceptual diagram showing an evacuation mechanism according to another embodiment.

FIG. 9 is a conceptual diagram showing a conventional reinforcing bar cutting device.

FIG. 10 is a conceptual diagram showing a conventional rebar cutting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcing bar 12 Fixed blade 13 Movable blade 14 First support part 15 Second support part 16 Spring 17 Fluid pressure support device E Evacuation mechanism

Claims (3)

(57) [Claims] A fixed blade (12) and said fixed blade (12)
A movable blade (13) operable in close proximity to the rebar (1) disposed between the two blades (12) and (13) in a longitudinal direction, the rebar cutting device comprising: A first support for supporting the rebar (1) on the fixed blade (12) side of the movable blade (13) in the longitudinal direction of the rebar (1) disposed between the two blades (12) and (13). Part (14) is provided, and the reinforcing bar (1 ) is provided in the radial direction.
On the side opposite to the movable blade (13) and the length of the reinforcing bar (1)
Direction from the movable blade (13) in the first support portion (1).
A second support portion (15) that supports the rebar (1) movably along the movable direction of the movable blade (13) is provided on the outer side in the opposite direction to 4), and the second support portion (15) is movable with respect to the rebar (1). The second support portion (15) with the cutting movement of the blade (13).
A rebar cutting device provided with an evacuation mechanism (E) that allows the movement of the rebar. 2. The retraction mechanism (E), wherein the movable blade (1)
Spring (16) that can be deformed along the movable direction of 3)
The rebar cutting device according to claim 1, wherein the second support portion (15) is supported via the support member. 3. The fluid pressure receiving means for receiving the second support portion (15) movably along a contact direction of the reinforcing bar (1) when the rebar supporting force exceeds a predetermined value. The rebar cutting device according to claim 1, comprising a support device (17).