JPH0818077B2 - Angle bender - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an angle bender for bending an angle member made of metal into a circular shape in the longitudinal direction to produce an annular member used for connecting a large diameter pipe or the like.

[Conventional technology]

Conventionally, an angle bender as shown in No. 6 is known as an apparatus for producing an annular material such as a round flange from a long metal angle material or flat iron material. The illustrated angle benders include a front lower roller 12 and a rear lower roller that are juxtaposed close to each other and are driven to rotate counterclockwise, respectively.
The upper roller 11 and the front lower roller of this device are provided with 13 and an upper roller 11 which is disposed above these two lower rollers 12 and 13 and is driven to rotate clockwise.
When the angle member 10 is inserted between the two 12, the angle member passes between the upper roller 11 and the rear lower roller 12 while causing bending deformation along the outer periphery of the upper roller 11, and the auxiliary roller
The radius of curvature of the angle member 10 is adjusted by the arrangement position of 16 and the upper roller 11 can be made to circulate in a circular shape.

[Problems to be Solved by the Invention]

By the way, when bending a long angle material in an annular shape as described above, if it is displaced so as to cross alternately just before the ends lap around, it will wrap around spirally thereafter. In the past, this work was done manually by the worker pulling the tip of the angle material while the roller was rotating, so it is not only dangerous,
It was a factor that hindered automation of bending.

The present invention has been made in order to eliminate the drawbacks of the conventional angle bender, and an angle bender capable of automatically performing the crossing operation of the tip end of the angle material at the time of bending with a roller by an accurate operation. The purpose is to provide.

[Means for solving the problem]

In order to achieve the above object, the angle bender of the present invention has a front lower roller and a rear lower roller juxtaposed in front of and behind an upper roller, and an angle between the upper roller and the lower rollers on both sides. In an angle bender in which a material is inserted in the feed direction and an annular material is formed by orbiting the angle material in the longitudinal direction,
An extrusion roller that pushes out so as to cross the orbiting angle member is provided, and an inlet side feed plate connected to a first limit switch is provided on the inlet side before the angle material passes through the extrusion roller. An exit side feed plate connected to a second limit switch is provided on the exit side where the angle material passes through the extrusion roller, and the entrance side feed plate and the exit side feed plate are respectively inclined by the passage of the angle material. The closing operation of the first limit switch and the second limit switch, the closing operation of the first limit switch stores the presence of the angle material, and the closing operation of the second limit switch causes the pushing roller to move. The pushing operation is performed, and further, after a preset time has elapsed after the closing operation of the second limit switch, the pushing roller is pushed. Performs pull-in operation of, during closing operation of the first limit switch is characterized in that in order to maintain the retracted state of the extruding rollers.

[Operation] In the angle bender having the above-mentioned configuration, the angle member is bent at a position immediately before the angle member circulates while being circularly bent in the longitudinal direction by bending the front lower roller, the rear lower roller, and the upper roller. The tips of the angle members are pushed out in a substantially vertical direction so as to cross each other in an alternating manner, and thus the angle members once brought into the intersecting state are successively sent to the orbiting state, and as a result, the annular member is spirally formed while maintaining a constant diameter. Can be formed.

Further, in automating the operation of the extrusion roller according to the present invention, an inlet side feed plate connected to the first limit switch is provided on the passage entrance side of the angle material of the extrusion roller, and a second limit switch is provided on the passage exit side of the angle material. A connected outlet side feed plate is provided, and the inlet side feed plate and the outlet side feed plate are tilted by the passage of the angle plate to close the first limit switch and the second limit switch, 1 When the limit switch is closed, the presence of the angle member is stored, after the second limit switch is closed, the pushing roller is pushed out, and when the preset time has elapsed after the second limit switch is closed, the pushing operation is performed. The pull-in operation of the roller is performed, and the push-out roller is pulled during the closing operation of the first limit switch. If it is configured to maintain the only state, after the pushing operation of the pushing roller is performed by the closing operation of the second limit switch, the closing operation of the first limit switch is performed until the end bending of the end of the angle material is completed. The extrusion roller is not extruded again while the angle detection memory of "material present" is stored.

On the other hand, when the above-mentioned push-out preventing means is not provided, the second limit switch is always closed while the angle member keeps the outlet side feed plate in a tilted state. After the operation is completed, even if the pushing roller is once pulled back, the pushing operation is repeated, and every time the pushing roller is pushed, the pushing roller hits the angle member and causes the angle member to be distorted.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 (a) and 1 (b) are schematic configuration diagrams of the angle bender of the embodiment apparatus seen from the front, and FIG. 2 is a schematic configuration diagram of the apparatus seen from the side, The same parts as those of the conventional device shown in FIG.

In the device shown in the figure, the front lower roller 12 and the rear lower roller 13 are juxtaposed in close proximity to each other, and are located above the lower rollers 12 and 13 and close to the lower rollers 12 and 13. An upper roller 11 is provided in the. An unillustrated rotary drive source such as an electric motor is connected to each of these rollers, and the upper roller 11 is rotated clockwise.
The front lower roller 12 and the rear lower roller 13 are rotated counterclockwise. As shown in FIG. 2, each of the front lower roller 12 and the rear lower roller 13 has a structure in which the rollers are doubly overlapped with each other with a gap into which the flange of the angle member 10 can be fitted.

A handle 21 is connected to the upper roller 11 via a screw 21a, and the upper roller 11 can be moved up and down by operating the handle. Further, the auxiliary roller 16 provided on the side of the upper roller 11 and near the rear lower roller 13 is connected to the handle 22 via the screw 22a, and the auxiliary roller 16 can be moved horizontally by operating the handle. You can

The guide rollers 23, 24 are provided along the passage position of the angle member 10 and prevent the angle member 10 from bending in the radial direction when the angle member 10 is bent in the longitudinal direction.

Rotate each roller of the above device to rotate the angle member 10
Is inserted between the upper roller 11 and the lower front roller 12, and then successively passed between the upper roller 11 and the lower rear roller 13, the angle member 10 is bent along the auxiliary roller 16 while being bent circularly in the longitudinal direction. Upper roller
Orbit around the outer circumference of 11. The radius of curvature of the angle member 10 thus bent is such that the upper roller 11 is vertically positioned,
It is adjusted by the setting position of the auxiliary roller 16.

Further, in the apparatus of the present embodiment, as described above, the extruding mechanism 30 for extruding the tip end of the angle member 10 in a substantially vertical direction is provided at the position immediately before the angle member 10 circulates while being circularly bent in the longitudinal direction and intersects. Has been. As shown in FIG. 2, the push-out mechanism 30 is provided with a long-axis push-out roller 33 that is driven to push out by a cylinder 25 installed on the apparatus main body via a guide 26 and a boss 27. Further, on each side along the axis of the extrusion roller 33 and on the side of the passage entrance of the angle member 10, there is a first
The feed plate 31 on the inlet side connected to the limit switch LSI, the second limit switch LS2 on the passage side of the angle member 10
And an outlet side feed plate 32 connected to the. The inlet side feed plate 31 and the outlet side feed plate 32 are angle members.
Each feed plate is tilted when the tip of the angle member 10 comes into contact when the angle member 10 passes when passing through 10, and is turned so as to be upside down when the angle member 10 does not come into contact.
Further, as shown in FIG. 3, when the feed plates 31 and 32 are in an inverted state, the limit switches LS1 and LS2 are opened, and the angle member 10 circulates to come into contact with the feed plates 31 and 32. When the feed plates 31, 32 are tilted in the feed direction of the angle member 10 shown by the arrow in FIG. 3, the limit switches LS1, LS2 are closed. The first and second limit switches LS1 and LS2 are connected to the controller C, and the push-out driving of the cylinder 25 is controlled by the signal of the controller C.

The circuit configuration of the controller C is shown in FIG. In the figure, when the first limit switch LS1 is closed, the angle detection storage of "with angle material" is performed. Next, when the second limit switch LS2 is closed, the cylinder operation setting timer is activated, the time contact is closed, the solenoid valve is opened, and the cylinder 25 is activated. The cylinder operation setting timer is, for example, the rotation speed of the upper roller 11, that is, the feed speed of the angle material 10 and the installation position of the extrusion mechanism 30, the extrusion roller 33 pushes the tip of the angle material 10 and then the angle materials 10 are alternately crossed. It is set so that the time is up after a pre-measured time before the operation. After this set time has elapsed, the solenoid valve is closed and the cylinder 25 retracts when the time contact is opened.

Next, the operation of the angle bender of this embodiment provided with the pushing mechanism 30 will be described with reference to the flow chart shown in FIG.

Rotate each roller of the above device to rotate the angle member 10
Is inserted between the upper roller 11 and the lower front roller 12, and then successively passed between the upper roller 11 and the lower rear roller 13, the angle member 10 is bent along the auxiliary roller 16 while being bent circularly in the longitudinal direction. Upper roller
Orbit around the outer circumference of 11. Next, when the tip of the angle member 10 comes into contact with the inlet side feed plate 31 and the feed plate 31 is tilted,
The first limit switch LS1 is closed, and the angle detection memory of "with angle material" is performed. When the tip of the angle member 10 subsequently contacts the outlet side feed plate 32 and tilts the feed plate 32, the second limit switch LS2 is closed and the cylinder operation setting timer is activated to push out the pushing roller 33 by the cylinder 25. At this time, the tip of the angle member 10 is extruded by the extruding roller 33 in a direction substantially perpendicular to the orbiting direction, and the upper roller 11 and the front lower roller 12 are extruded.
The tip of the angle member 10 is alternately crossed with respect to the angle member 10 portion immediately before being inserted (Fig. 1 (b)).
reference). Thus, the angle member 10 once brought into the crossed state
It is possible to form an annular material in a spiral shape while maintaining a constant diameter as it is bent by each roller and subsequently sent to the orbiting state. Then, after the set time has elapsed, the cylinder 25 retracts and the push-out roller 33 is pulled back.
Here, while the bending process of the angle member 10 is not completed until the end, the angle member 10 contacts the inlet side feed plate 31 and the feed plate 31
The first limit switch LS
1 is left closed and the angle detection memory of "with angle material" is left. During this time, the outlet side feed plate 32 is also in the tilted state, and the second limit switch is closed.
Does not operate and remains pulled back.

Then, when the end of the angle member 10 passes through the pushing mechanism 30, the inlet side feed plate 31 and the outlet side feed plate 32 are inverted, and at the same time, the first limit switch LS1 and the second limit switch LS2 are opened.

Thus, after the pushing operation of the pushing roller 33 is performed by the closing operation of the second limit switch, the angle detection memory of "there is an angle material" is stored by the closing operation of the first limit switch until the bending processing of the end of the angle material 10 is completed. When it is in the made state, the pushing operation of the pushing roller is not performed again and the pulled state can be maintained. As a result, it is possible to prevent the second limit switch from being pulled back and then repeated the pushing operation again because the second limit switch is in the closed state, thereby eliminating the inconvenience that the angle member is distorted each time it is pushed. It is possible to improve the quality of the annular material as a product.

〔The invention's effect〕

As described above, according to the angle bender of the present invention, the work of pulling the tip end of the angle material, which was conventionally performed by the worker during the rotation of the roller, can be performed by the extrusion roller, so that the bending work can be performed. Safety is secured.

Further, in automating the operation of the pushing roller in the present invention, the presence of an angle member is stored by the closing operation of the first limit switch, and the pushing operation of the pushing roller is performed by the closing operation of the second limit switch. 2 By performing a retracting operation of the push-out roller after a preset time has elapsed from the closing operation of the limit switch, and by maintaining the pull-in state of the push-out roller during the closing operation of the first limit switch, It is possible to prevent the operation of pulling back once and repeating the extrusion operation again, and it is possible to eliminate the inconvenience of causing distortion in the angle material each time the angle material is extruded, and it is possible to improve the quality of the product. In addition, it is possible to realize the automation of the angle bender that guarantees reliable operation. Kill.

[Brief description of drawings]

1 (a) and 1 (b) are schematic structural views of an ankle venter of an embodiment of the present invention viewed from the front, and FIG. 2 is a side view of the device shown in FIG. FIG. 3 is a schematic configuration diagram, FIG. 3 is a schematic top down view of the push-out mechanism provided in FIG. 1, and FIG. 4 is a circuit configuration of the controller C.
FIG. 6 is a flowchart of an apparatus according to an embodiment of the present invention,
The figure is a schematic configuration diagram of a conventional angle bender. 10 …… Angle material 11 …… Upper roller 12 …… Lower front roller 13 …… Lower rear roller 16 …… Auxiliary roller 25 …… Cylinder 30 …… Extrusion mechanism 31 …… Inlet side feed plate 32 …… Outlet side Feed plate 33 …… Extrusion roller LS1 …… First limit switch LS2 …… Second limit switch

Claims (1)

[Claims] 1. A front lower roller and a rear lower roller are juxtaposed in front of and behind the upper roller, and an angle member is inserted in the feed direction between the upper roller and the lower rollers on both sides to form an angle. In an angle bender configured to form an annular material by orbiting a material in the longitudinal direction, an extrusion roller is provided to push out the orbiting angle material so as to intersect, and the angle material passes through the extrusion roller. An inlet side feed plate connected to the first limit switch is provided on the front inlet side, and an outlet side feed plate connected to the second limit switch is provided on the outlet side where the angle material passes through the extrusion roller, The inlet side feed plate and the outlet side feed plate are respectively inclined by the passage of the angle member, so that the first limit switch and the second limit switch are inclined. The closing operation of the switch, the closing operation of the first limit switch stores the presence of the angle material, and the closing operation of the second limit switch causes the extruding operation of the extruding roller. The pushing-out operation of the extrusion roller is performed after a preset time has elapsed from the closing operation of the limit switch, and the pulling-out state of the extrusion roller is maintained during the closing operation of the first limit switch. Angle bender.