JP6832007B2 - Rebar cutting machine - Google Patents

Description

The present invention relates to a reinforcing bar cutting machine in which a movable blade that can be operated close to a fixed blade is provided so as to be displaced in the longitudinal direction of a reinforcing bar arranged between the two blades.

Conventionally, in a reinforcing bar cutting space formed by the fixed blade and the movable blade in a reinforcing bar cutting machine, the movable blade moves up and down, so that the lower part of the movable blade is simply a falling space for the cutting reinforcing bar. (See, for example, Patent Document 1).
Therefore, as shown in FIGS. 9A to 9C, when the reinforcing bar 20 is cut by the lowering of the movable blade 2, the reinforcing bar portion near the fixed blade 1 is curved under the movable blade 2. The cut end of the reinforcing bar 20 is greatly deformed, and this phenomenon occurs even if a retracting mechanism is provided outside the reinforcing bar cutting space by a spring as in Patent Document 1, from the fixed blade to the retracting mechanism. It didn't change because of the distance.
In addition, an auxiliary receiving plate for the reinforcing bar, which can be swung up and down and is attached so as to be urged by a spring, is provided at the tip of the transport conveyor that supplies the reinforcing bar to the reinforcing bar cutting machine, and as the movable blade descends. A device has also been proposed in which the tip of the auxiliary receiving plate moves downward and absorbs the reaction force when the reinforcing bar is cut (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 8-11015 Jikkenhei 6-5733 Gazette

The above-mentioned device also has a structure in which the auxiliary receiving plate is far from the fixed blade of the reinforcing bar cutting machine and absorbs the reaction force by vertical swing, so that when the reinforcing bar is cut by the lowering of the movable blade. In addition, the problem that the reinforcing bar portion near the fixed blade is bent in a curved shape on the lower side of the movable blade and the cut end of the reinforcing bar is deformed cannot be solved.

Therefore, an object of the present invention is to provide a reinforcing bar cutting machine that solves the above-mentioned problems and suppresses deformation of the cut end of the reinforcing bar when the reinforcing bar is cut.

The first characteristic configuration of the present invention is a reinforcing bar cutting machine in which a movable blade that can be operated close to the fixed blade is displaced in the longitudinal direction of the reinforcing bar arranged between the two blades, and the fixing is performed. In the reinforcing bar cutting space between the blade and the movable blade, a plate-shaped reinforcing bar receiving surface portion that receives a plurality of reinforcing bars before cutting together with the fixed blade under the movable blade is lowered as the movable blade is lowered. A rebar receiving device to be cut is attached to the main body of the rebar cutting machine so as to allow it to descend together with the rebar to be cut, and the reinforcing bar receiving surface portion is upwardly provided on the rebar receiving device to be cut. A plurality of urging means for urging are provided along the cutting direction by the fixed blade and the movable blade and the longitudinal direction, respectively.

According to the first characterizing feature of the present invention, when cutting a plurality of reinforcing bars lowers the movable blade against the fixed blade, the plurality of reinforcing bars, the cut rebar receiving device rebar with the fixed blade It is received by the receiving surface, and as the movable blade descends, the reinforcing bar to be cut is sandwiched between the movable blade and the reinforcing bar receiving surface below it, and the movable blade operates close to the fixed blade and the fixed blade. With the virtual shear cross section between and the boundary, it tries to descend in parallel while being sheared with the movable blade.
Therefore, it is possible to prevent the reinforcing bar portion on the lower side of the movable blade and close to the fixed blade from bending in a curved shape, and it is possible to suppress the large deformation of the cut end of the reinforcing bar.

The second characteristic configuration of the present invention is to provide a reinforcing bar discharge port on the front side in a plan view so that the reinforcing bar placed on the fixed blade can be discharged in the radial direction, and the cutting edge of the movable blade is described. The reinforcing bars to be placed on the fixed blade are formed on an inclined surface that is lower toward the reinforcing bars on one end side so as to cut in order from the reinforcing bars on one end side to the reinforcing bars on the other end side. Is configured to be sequentially descendable from the side closer to the reinforcing bar on one end side.

According to the second feature configuration of the present invention, in addition to being able to achieve the above-mentioned effects and effects of the first feature configuration of the present invention, a plurality of reinforcing bars placed on the fixed blade are provided on one end side. in the order toward reinforcing bars at the other end from the reinforcing bar, since the cut rebar is cut while being held between the cutting edge and the rebar receiving surface portion of the movable blade, not applied large load to the movable blade, clean all rebar Can be cut into.
Therefore, even if the number of reinforcing bars to be cut at one time by the reinforcing bar cutting machine increases, each reinforcing bar can be cut almost evenly while suppressing the deformation of the cut end, and can be taken out from the reinforcing bar discharge port. become.

The third characteristic configuration of the present invention is to provide a reinforcing bar discharge port on the front side in a plan view so that the reinforcing bar placed on the fixed blade can be discharged in the radial direction, and the cutting edge of the movable blade is described. The reinforcing bars to be placed on the fixed blade are formed on an inclined surface that is lower toward the reinforcing bar discharge port so as to cut in order from the one closer to the reinforcing bar discharge port, and the reinforcing bar receiving surface portion is formed. It is configured so that it can be lowered sequentially from the side close to the reinforcing bar outlet to the back.

According to the third characteristic configuration of the present invention, a plurality of reinforcing bars placed on the fixed blade are cut between the cutting edge of the movable blade and the reinforcing bar receiving surface portion in order from the one closest to the reinforcing bar discharge port. Since the reinforcing bars are cut while being sandwiched, a large load is not applied to the movable blade, and all the reinforcing bars can be cut neatly.
Therefore, even if the number of reinforcing bars to be cut at one time by the reinforcing bar cutting machine increases, each reinforcing bar can be cut almost evenly while suppressing the deformation of the cut end, and can be taken out from the reinforcing bar discharge port. become.
In addition, the cutting edge of the movable blade is formed on an inclined surface that becomes lower toward the side closer to the reinforcing bar discharge port, and the reinforcing bar receiving surface portion is configured to be sequentially descendable from the side closer to the reinforcing bar discharge port to the back. As the movable blade with an inclined surface descends and approaches the fixed blade, the multiple reinforcing bars placed on the fixed blade are directed toward the back from the reinforcing bar discharge port without escaping from the reinforcing bar discharge port. The movement of being pushed and trying to escape on the fixed blade is blocked at the inner part opposite to the reinforcing bar discharging side, and as a result, all the reinforcing bars can be reliably cut with a light load.

The fourth characteristic configuration of the present invention is that the urging means is configured by at least one of a spring and a pneumatic cylinder.

According to the fourth characteristic configuration of the present invention, the rebar receiving device to be cut can be formed easily and inexpensively.

It is the whole plan view of the reinforcing bar cutting device. It is a perspective view from the right side of the reinforcing bar cutting machine, and a partially enlarged view is shown. It is a perspective view from the left side of the reinforcing bar cutting machine, and a partially enlarged view is shown. It is a front view of a reinforcing bar cutting machine. In the side view of the reinforcing bar cutting action, (a) shows a state before cutting, (b) shows a state during cutting, and (c) shows a time when cutting is completed. Reinforcing bar cutting action In the front view, (a) shows the state before cutting, (b) shows the middle of cutting, and (c) shows the time when cutting is completed. In the side view of the reinforcing bar cutting action of another embodiment, (a) shows the state before cutting, (b) shows the state during cutting, (c) shows the time when cutting is completed, and (d) the first dispensing device. It shows the middle of discharging the cut reinforcing bar by. It is an operation side view of the main part which shows the middle of discharging the cut reinforcing bar by the 1st payout device of another embodiment. The front view of the reinforcing bar cutting action of the prior art is shown, (a) shows the state before cutting, (b) shows the state during cutting, and (c) shows the state immediately after cutting.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 6, a reinforcing bar cutting machine 3 is provided in which a movable blade 2 that can be operated close to the fixed blade 1 is displaced in the longitudinal direction of the reinforcing bar 20 arranged between the two blades. A first conveyor device 4 is provided which is arranged on the superior side of the reinforcing bar cutting machine 3 in the conveying direction of the reinforcing bar 20 to receive the reinforcing bar 20 and send it to the reinforcing bar cutting machine 3 to convey the reinforcing bar 20 from the reinforcing bar cutting machine 3 in the conveying direction of the reinforcing bar 20. A second conveyor device 5 is provided on the lower side to receive and take out and convey the reinforcing bar 20, and the reinforcing bar discharge port 6 is provided so that the reinforcing bar 20 placed on the fixed blade 1 can be discharged in the radial direction. With respect to the virtual shear section 18 between the fixed blade 1 and the movable blade 2 that operates close to the fixed blade 1 in the reinforcing bar cutting space of the reinforcing bar cutting machine 3 provided on the front side of the reinforcing bar cutting machine 3 visually. A first payout device 7 for pushing out the reinforcing bar 20 to the reinforcing bar discharge port 6 is provided on the upper side in the longitudinal direction of the reinforcing bar, and the reinforcing bar 20 is pushed out to the reinforcing bar discharge port 6 on the lower side in the longitudinal direction of the reinforcing bar with respect to the virtual sheared cross section 18. A reinforcing bar cutting device provided with the second payout device 8 is configured.
The first payout device 7 is attached to the tip of the piston rod of the first cylinder 7B and its first cylinder 7B, which can be expanded and contracted, in order to push out the reinforcing bar and discharge it from the cutting space of the reinforcing bar cutting machine 3 to the outside. It is composed of a first reinforcing bar discharge plate 7A. Similarly, the second payout device 8 is attached to the tip of the piston rod of the second cylinder 8B and the second cylinder 8B, which can be expanded and contracted, in order to push out the reinforcing bar and discharge it from the cutting space of the reinforcing bar cutting machine 3 to the outside. It is composed of a second reinforcing bar discharge plate 8A.

As shown in FIG. 4, in the reinforcing bar discharge port 6, a first guard plate 9 capable of closing a portion corresponding to the first payout device 7 is provided so as to be able to switch between a closed state and an open state, and a second payout is performed. A second guard plate 10 capable of closing a portion corresponding to the device 8 is freely provided for switching between a closed state and an open state, and the first guard plate 9 is released from the closed state based on the payout operation of the first payout device 7. A first drive device 11 for switching to a state is provided, and a second drive device 12 for switching the second guard plate 10 from a closed state to an open state based on the payout operation of the second payout device 8 is provided.
The first guard plate 9 and the second guard plate 10 are attached to the reinforcing bar cutting machine main body 3A by hanging them vertically and vertically on the front side of the reinforcing bar discharge port 6, respectively, and as described above, the first guard plate 9 is vertically swung by the first drive device 11, and the second guard plate 10 is vertically swung by the second drive device 12.

The first conveyor device 4 is provided with a retracting operation mechanism for pulling back the rear end portion of the reinforcing bar 20 sent to the reinforcing bar cutting machine 3 from the reinforcing bar cutting machine 3, and the reinforcing bar 20 pulled back by the retracting operation mechanism is pulled back by the first conveyor device 4. A reinforcing bar residual material discharge mechanism 15 for discharging to the lateral side is provided.

That is, as shown in FIG. 1, the first conveyor device 4 is composed of a post-feeding conveyor 4A on the upper side and a pre-feeding conveyor 4B on the lower side, and the pre-feeding conveyor 4B can be driven and rotated in the forward and reverse directions. A forward operation mechanism that advances the reinforcing bar 20 and supplies it to the reinforcing bar cutting machine 3, and a backward operation mechanism that pulls back the rear end portion of the reinforcing bar 20 sent to the reinforcing bar cutting machine 3 from the reinforcing bar cutting machine 3. Is provided.
Then, the reinforcing bar residual material on the rear end side pulled back from the reinforcing bar cutting machine 3 is placed on the pre-feeding conveyor 4B by the arm 13 that can swing up and down and the cylinder 14 that drives the arm 13 up and down. The discharge mechanism 15 is configured to be able to discharge the residual material to the stocker 16.
Reference numeral 30 in the figure is attached to the reinforcing bar cutting machine 3 by a pinch roller so as to be vertically movable, and is provided in cooperation with a receiving roller 31 which is provided on the tip side (lower side) of the pre-feeding conveyor 4B and rotates in the forward and reverse drives. The reinforcing bar 20 placed on the receiving roller 31 is sandwiched together with the pinch roller 30 so that it can be supplied to or pulled back from the reinforcing bar cutting machine.

As shown in FIGS. 1 and 6, the second conveyor device 5 is provided with stoppers 17 capable of moving up and down at predetermined intervals in the longitudinal direction thereof, and moves in perspective with respect to the reinforcing bar cutting machine 3 within a set distance. From the virtual shear section 18 formed by the movable blade 2 and the fixed blade 1 of the reinforcing bar cutting machine 3 by the perspective movement operation of the second conveyor device 5, from among a plurality of stoppers 17. The cutting dimension of the reinforcing bar 20 can be set by adjusting the distance to the selected stopper 17.
That is, the separation distance between the plurality of stoppers 17 is fixed, and when it is desired to cut the reinforcing bar 20 having a length other than the dimension of the length from the virtual shearing cross section 18 to each stopper 17, the second conveyor device 5 is moved. Then, the reinforcing bar 20 having a predetermined size can be cut.

As shown in FIGS. 5 and 6, the fixed blade 1 is attached so that its cutting edge is along a horizontal plane or a substantially horizontal plane, and the movable blade 2 is inclined so that its cutting edge becomes lower toward the reinforcing bar discharge port 6. It is formed on the surface, and when a plurality of reinforcing bars 20 are fixedly placed and cut, the movable blade 2 is prevented from being heavily loaded at one time by cutting in order from the one closest to the reinforcing bar discharge side. Then, it is formed so as to suppress the deformation of the cut surface of each of the plurality of reinforcing bars 20.
In the reinforcing bar cutting space S, a receiving plate 19 for receiving the reinforcing bar 20 mounted on the fixed blade 1 together with the fixed blade 1 in the vicinity is provided.

A movable blade 2 that can be operated close to the fixed blade 1 is provided so as to be displaced in the longitudinal direction of the reinforcing bar arranged between the two blades, and is provided in the reinforcing bar cutting space S by the fixed blade 1 and the movable blade 2. The reinforcing bar receiving surface portion 24 that receives the reinforcing bar 20 before cutting together with the fixed blade 1 on the lower side of the movable blade 2 can be moved up and down so as to allow it to be lowered together with the reinforcing bar to be cut as the movable blade 2 is lowered. The reinforcing bar receiving device 25 to be provided is attached to the reinforcing bar cutting machine main body 3A, and the reinforcing bar receiving device 25 to be cut is provided with an urging means 21 for urging the reinforcing bar receiving surface portion 24 upward.
The urging means 21 is composed of a pneumatic cylinder, and the reaction force against the shearing pressing force by the movable blade 2 can be adjusted by the adjusting mechanism of the amount of air or the pressure in the pneumatic cylinder, and the reinforcing bar receiving device 25 to be cut can be adjusted. As shown in FIGS. 2, 4, and 6, it is possible to set the lower limit value of the lowering limit of the reinforcing bar receiving surface portion 24 and the vertical position when the cut reinforcing bar is discharged by the first payout device 7.

As shown in FIGS. 5 to 6, the rebar receiving device 25 to be cut is configured to operate in order.
1. The movable blade 2 having the cutting edge formed on the inclined surface descends with respect to the plurality of reinforcing bars 20 placed on the fixed blade 1.
2. As the movable blade 2 descends, the reinforcing bar near the reinforcing bar discharge port 6 is sequentially cut from the reinforcing bar at the back, and the reinforcing bar receiving device 25 to be cut is also sequentially cut from the portion near the reinforcing bar discharge port 6 to the back. Descend. That is, the reinforcing bar receiving surface portion 24 descends while tilting due to the contraction action of each of the plurality of air cylinders that support the reinforcing bar receiving surface portion 24 so as to urge it upward from the bottom (FIG. 5 (a) → FIG. 5). (C), FIG. 6 (a) → FIG. 6 (b)).
3. When all the reinforcing bars 20 have been cut, the movable blade 2 rises and returns to the original position before the cutting operation.
4. The reinforcing bar receiving surface portion 24 of the reinforcing bar receiving device 25 to be cut is lifted and stopped until it is in a horizontal or substantially horizontal posture at a discharge setting position below the upper surface position of the fixed blade 1 (FIG. 6). (C)).
5. With the reinforcing bar receiving surface portion 24 maintained at the discharge setting position, the cut reinforcing bar is discharged by the first reinforcing bar discharging plate 7A by the extension operation of the first cylinder 7B in the first dispensing device 7. It is discharged from the outlet to the outside of the reinforcing bar cutting space (FIGS. 2 and 6 (c)).
6. After the discharge of the cut reinforcing bar is completed, the first reinforcing bar discharging plate A of the first dispensing device 7 retreats to the original position due to the contraction of the first cylinder 7B, and the reinforcing bar receiving device 25 of the cut reinforcing bar receiving device 25 is retreated. The surface portion 24 returns and rises to the same height as the upper surface position of the fixed blade 1.

[Another Embodiment]
Other embodiments will be described below.

<1> As shown in FIGS. 7A to 7D, the reinforcing bar receiving device 25 to be cut is formed so that the reinforcing bar receiving surface portion 24 descends in parallel while maintaining a horizontal posture when the reinforcing bar is cut. Is also good.
<2> The urging means 21 may be formed of a spring instead of the pneumatic cylinder.
<3> When the cut reinforcing bar mounted on the reinforcing bar receiving surface portion 24 is discharged, as shown in FIG. 8, the reinforcing bar receiving surface portion 24 is raised and returned to the upper surface position of the fixed blade by the first dispensing device 7. It may be discharged.
<4> As shown in FIGS. 3 and 4, the first discharge guide plate 22 whose tip side is inclined downward so that the reinforcing bar can be slid and discharged downward is at the end portion of the receiving plate 19 on the reinforcing bar discharge port side. Is attached, and as shown in FIG. 7, a second discharge guide plate 23 that moves up and down with the vertical movement of the reinforcing bar receiving surface portion 24 is also attached to the reinforcing bar discharge port side end portion of the reinforcing bar receiving surface portion 24. Is also good.

As described above, although the reference numerals are given for convenience of comparison with the drawings, the present invention is not limited to the configuration of the attached drawings. In addition, it goes without saying that it can be carried out in various aspects without departing from the gist of the present invention.

1 Fixed blade 2 Movable blade 3 Reinforcing bar cutting machine 3A Reinforcing bar cutting machine main body 6 Reinforcing bar outlet 20 Reinforcing bar 21 Energizing means 24 Reinforcing bar receiving surface 25 Reinforcing bar receiving device S Reinforcing bar cutting space

Claims (4)

A rebar cutting machine in which a movable blade that can be operated close to a fixed blade is provided so as to be displaced in the longitudinal direction of a rebar arranged between the two blades.
In the reinforcing bar cutting space by the fixed blade and the movable blade,
A plate-shaped reinforcing bar receiving surface portion that receives a plurality of reinforcing bars before cutting together with the fixed blade on the lower side of the movable blade is allowed to descend together with the reinforcing bar to be cut as the movable blade descends. Attach the rebar receiving device to be cut, which can be moved up and down, to the main body of the rebar cutting machine.
In the rebar receiving device to be cut, a plurality of urging means for urging the reinforcing bar receiving surface portion upward are provided along the cutting direction by the fixed blade and the movable blade and the longitudinal direction, respectively. Multiple rebar cutting machines. A reinforcing bar discharge port that allows the reinforcing bar to be placed on the fixed blade to be discharged in the radial direction is provided on the front side in a plan view.
The cutting edge of the movable blade has an inclined surface that becomes lower toward the reinforcing bar on one end side so as to cut in order from the reinforcing bar on one end side to the reinforcing bar on the other end side with respect to the plurality of reinforcing bars placed on the fixed blade. Form and
The reinforcing bar cutting machine according to claim 1, wherein the reinforcing bar receiving surface portion can be sequentially lowered from the side closer to the reinforcing bar on one end side. A reinforcing bar discharge port that allows the reinforcing bar to be placed on the fixed blade to be discharged in the radial direction is provided on the front side in a plan view.
The cutting edge of the movable blade is formed on an inclined surface that becomes lower toward a plurality of reinforcing bars placed on the fixed blade so as to cut in order from the one closer to the reinforcing bar discharge port. And
The reinforcing bar cutting machine according to claim 1, wherein the reinforcing bar receiving surface portion can be sequentially lowered from the side close to the reinforcing bar discharge port to the back. The reinforcing bar cutting machine according to any one of claims 1 to 3, wherein the urging means is composed of at least one of a spring and a pneumatic cylinder.

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