JPH0386324A - Angle bender - Google Patents

Abstract

PURPOSE:To keep the safety of bending work by arranging a roller which pushes the tip of the angle material so as to intersect each other at just before they cross after the angle is roundly turned when the angle material is passed through between the upper roll and the lower roll and is bent to a circle in the longitudinal direction. CONSTITUTION:The angle material is bent in the longitudinal direction to the circle with the bending work of the front lower roller 12, the rear lower roller 13 and the upper roller 11. The tip of the angle material 10 is pushed nearly in the perpendicular direction with the operation of the pushing roller 33 so as to intersect the tips of above angle material 10 each other at the position just before the tips of material cross after roundly turned. The angle material 10 which is once bringed to the crossed state is continuously fed with the roundly turned state and then formed to the loop material of a spiral state while keeping the constant diameter. Therefore, the safety of bending work is kept because the pushing roller 33 executes the operation to pull the tip of the angle material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an angle bender that bends a metal angle member into a circular shape in the longitudinal direction to produce an annular member used for connecting large diameter pipes and the like.

[Conventional technology]

Conventionally, an angle bender as shown in No. 6 is known as an apparatus for manufacturing an annular member such as a round flange from a long metal angle member or a flat iron member. The illustrated angle bender has a front lower roller 12 and a rear lower roller 13 which are arranged close to each other and are driven to rotate counterclockwise, and which are disposed above between these two lower rollers 12 and 13. An upper roller 11 is installed and driven to rotate clockwise.
When the angle material 10 is inserted between the upper roller 11 and the front lower roller 12 of this device, the angle material bends and deforms along the outer periphery of the upper roller 11 while bending between the upper roller 11 and the rear lower roller. The angle member 10 passes between the rollers 12 and is caused to circulate around the upper roller 11 in a circular manner while the radius of curvature of the angle member 10 is adjusted depending on the position of the auxiliary roller 16.

[Problem to be solved by the invention] By the way, when bending a long angle member into an annular shape as described above, if you shift the tips so that they intersect alternately just before they go around and intersect, then the bending will continue into a spiral shape. Traditionally, this work was done manually by a worker pulling the tip of the angle material while the roller was rotating, which is not only extremely dangerous, but also requires automation of the bending process. This was a factor that inhibited the

The present invention has been made in order to eliminate the drawbacks of the conventional angle bender, and provides an angle bender that can automatically perform the crossing motion of the tip of the angle material during bending with a roller in an accurate motion. The purpose is to provide.

[Means for Solving the Problems 1] In order to solve the above problems, the angle bender of the present invention includes a front lower roller and a rear lower roller that are arranged close to each other in parallel and are each driven to rotate counterclockwise. , an upper roller disposed above between these two lower rollers and driven to rotate clockwise, and after inserting the angle material between the upper roller and the front lower roller, In an angle bender that produces an annular member by bending the angle member circularly in the longitudinal direction by passing between the upper roller and the rear lower roller, the angle member is rotated while being bent circularly in the longitudinal direction. The present invention is characterized in that an extrusion roller is provided at a position immediately before the angle members intersect so as to push out the ends of the angle members in a substantially vertical direction so as to alternately intersect the angle members.

Further, an artificial side feed plate connected to a first limit switch is provided on the inlet side of the extrusion roller through which the angle material passes, and an outlet side feed plate connected to a second limit switch is provided on the outlet side of the extrusion roller through which the angle material passes. The inlet side feed plate and the outlet side feed plate are tilted by the passage of the angle member, and the first limit switch and the second limit switch are tilted by the passage of the angle member.
The limit switch is closed, the first limit switch is closed to store the presence of an angle material, the second limit switch is closed to cause the extrusion roller to push out, and the second limit switch is closed. The extrusion roller is retracted after a preset time has elapsed, and the retracted state of the extrusion roller is maintained during the closing operation of the first limit switch.

[Function] In the angle bender having the above configuration, the angle material is bent into a circular shape in the longitudinal direction by the bending process of the front lower roller, the rear lower roller, and the upper roller at a position immediately before the angle material intersects. The tips of the angle members are pushed out in a substantially vertical direction so as to alternately intersect with each other, and as the angle members, once crossed, continue to be sent around, they spirally form annular members while maintaining a constant diameter. can be formed.

Further, in order to automate the operation of the extrusion roller in the present invention, an inlet side feed plate connected to a first limit switch is provided on the inlet side of the extrusion roller through which the angle material passes, and a second limit switch is connected to the outlet side of the extrusion roller through which the angle material passes. 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 Ang plate to close the first limit switch and the second limit switch, and the first limit switch and the second limit switch are closed. The closing operation of the first limit switch memorizes that there is an angle material, the closing operation of the second limit switch causes the extrusion roller to perform the extrusion operation, and the extrusion is performed after a preset time has elapsed from the closing operation of the second limit switch. If the configuration is such that the retracting operation of the roller is performed and the retracting state of the extrusion roller is maintained during the closing operation of the first limit switch, after the extrusion roller is extruded by the closing operation of the second limit switch, Until the bending process of the end of the angle material is completed, the extrusion roller will not extrude again while the angle detection memorization of "angle material present" is performed by the closing operation of the first limit switch.

On the other hand, if the extrusion prevention means described above is not provided, the second limit switch is always closed while the angle material is tilting the exit side feed plate, so the extrusion Even if the extrusion roller is pulled back after the operation is completed, the extrusion operation is repeated again, and each time the extrusion roller is pushed out, the extrusion roller hits the angle material, causing distortion in the angle material.

[Example] Hereinafter, an example 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 device viewed from the front, and FIG. 2 is a schematic configuration diagram of the same device viewed from the side. The same reference numerals are used for the same parts as in the conventional device shown in FIG.

In the illustrated device, the front lower roller 12 and the rear lower roller 13 are juxtaposed close to each other, and the rain lower roller 1 is located above the lower rollers 12 and 13.
An upper roller 11 is provided at a position close to 2.13. A rotation drive source (not shown) such as an electric motor is connected to each of these rollers, and the upper roller 11 is rotated clockwise, and 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 stacked in double layers with a gap in which the collar of the angle member 10 can be fitted.

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

Guide rollers 23, 24 are provided along the passage of the angle 10 to prevent radial deflection when the angle 10 is bent circularly in the longitudinal direction.

The angle material 10 is rotated by driving each roller of the above device.
is inserted between the upper roller 11 and the front lower roller 12, and then passed between the upper roller 11 and the rear lower roller 13, the angle material 10 is bent one circular length in the longitudinal direction and is bent by the auxiliary roller 16. along the outer circumference of the upper roller 11. The radius of curvature of the angle material 10 to be bent in this way is
1 is adjusted by the vertical position and the setting position of the auxiliary roller 16.

Furthermore, in the apparatus of this embodiment, an extrusion mechanism 30 is provided at a position immediately before the angle material 10 intersects while being bent circularly in the longitudinal direction, for pushing out the tip of the angle material 10 in a substantially vertical direction. It is being

As shown in FIG. 2, this extrusion mechanism 30 includes a cylinder 25 installed on the main body of the device, a guide 26 and a boss 2.
A long-sleeved type extrusion roller 33 is driven by the cylinder 25 through the extrusion roller 7, and an angle material lO is provided on each side along the axis of the extrusion roller 33.
An inlet side feed plate 31 connected to the first limit switch LSI is provided on the passage entrance side of the angle material IO, and an outlet side feed plate 32 connected to the second limit switch LS2 is provided on the passage exit side of the angle material IO. It is. The inlet side feed plate 31 and the outlet side feed plate 32 are returned so that when the tip of the angle piece 10 comes into contact with it when the angle piece 10 passes, each feed plate tilts, and when the angle piece 10 does not come into contact, it stands upside down. It has a rotatable structure with functions.

Further, as shown in FIG. 3, when each feed plate 31.32 is in an inverted state, each limit switch LS1, LS2 is opened, and the angle member 10 rotates to move each feed plate 31.32.
When these feed plates 3L32 are tilted in the feeding direction of the angle material 10 shown by arrows in FIG. 3, each limit switch LSI.

LS2 is closed. 1st and 2nd limit switch L
SI and LS2 are connected to a controller C, and the extrusion drive of the cylinder 25 is controlled by a signal from the controller C.

FIG. 4 shows the circuit configuration of controller C.

In the figure, when the first limit switch LSI is closed, the angle detection and memorization of "angle material present" is performed.

Next, when the second limit switch LS2 is closed, the cylinder operation setting timer is activated, the time limit contact is closed, the solenoid valve is opened, and the cylinder 25 is activated. For example, the cylinder operation setting timer is configured such that the extrusion roller 33 pushes out the tip of the angle material 10 and then alternately crosses the angle material 10 based on the relationship between the rotational speed of the upper roller 11, that is, the feeding speed of the angle material IO, and the installation position of the extrusion mechanism 30. The timer is set to time up after a pre-measured time. After the set time has elapsed, the time limit contact opens, the solenoid valve closes, and the cylinder 25 retreats.

Next, the operation of the angle bender of this embodiment equipped with the extrusion mechanism 30 will be explained with reference to the flowchart shown in FIG.

The angle material 10 is rotated by driving each roller of the above device.
When the angle member 10 is inserted between the upper roller 11 and the front lower roller 12 and then passed between the upper roller 11 and the rear lower roller 13, the angle member 10 is bent circularly in the longitudinal direction while being bent along the auxiliary roller 16. The roller rotates around the outer circumference of the upper roller 11. Next, when the tip of the angle material 10 contacts the entrance side feed plate 31 and tilts the feed plate 31, the first limit switch LSI is closed and the angle detection memorization of "angle material present" is made. Subsequently, the tip of the angle material 10 is placed on the exit side feed plate 3
2 and tilts the feed plate 32, the second limit switch LS2 is closed, the cylinder operation setting timer is activated, and the cylinder 25 pushes out the push roller 33.

At this time, the tip of the angle material lO is
The angle members 10 are pushed out in a direction substantially perpendicular to the circumferential direction, and the tips of the angle members 10 alternately intersect with the portion of the angle members 10 immediately before being inserted between the upper roller 11 and the front lower roller 12 (Fig. 1). (see (b)). The angle member 10, which has been brought into the crossed state in this way, is bent by each roller and then sent around in a circular manner to form a spiral annular member while maintaining a constant diameter. Then, after the set time has elapsed, the cylinder 25 retreats and the extrusion roller 33 is pulled back. Here, while the bending process of the angle material IO is not completed to the end, the angle material 10 comes into contact with the inlet side feed plate 31 and the feed plate 31
The first limit switch L is tilted.
The SI is kept closed and the angle detection memory of "angle material present" is kept. During this time, the outlet side feed plate 32 is also in a tilted state, and the second limit switch is kept in a closed state.

When the angle detection memory of "angle material present" is stored, the cylinder 25 does not operate and maintains the pulled back state.

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

In this way, after the extrusion roller 33 performs the extrusion operation by closing the second limit switch, the angle material lO
Until the bending process of the terminal is completed, when the angle detection memorization of "Angle material present" is performed by the closing operation of the first limit switch, the extrusion roller does not extrude again and remains in the pulled back state. can do.

This prevents the second limit switch from being pulled back and repeating the extrusion operation again when the second limit switch is in a closed state, thereby eliminating the inconvenience of causing distortion in the angle material each time the angle material is extruded. This makes it possible to improve the quality of the annular material that is the product.

[Effects of the Invention] As explained above, according to the angle bender of the present invention, the extrusion roller can perform the work of pulling the tip of the angle material, which was conventionally done manually by an operator while the roller was rotating. Therefore, the safety of the bending process is ensured.

Further, in order to automate the operation of the extrusion roller in the present invention, the presence of an angle material is memorized by the closing operation of the first limit switch, and the extrusion operation of the extrusion roller is performed by the closing operation of the second limit switch,
The extrusion roller is configured to be retracted after a preset time has elapsed from the closing operation of the second limit switch, and to maintain the retracted state of the extrusion roller during the closing operation of the first limit switch. As a result, it is possible to prevent the action of being pulled back once and then 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, thereby improving the quality of the product. It is possible to realize angle bender automation that guarantees reliable operation.

[Brief explanation of drawings]

1(a) and 1(b) are schematic configuration diagrams of an angle bender of an embodiment of the present invention viewed from the front, and FIG. 2 is a side view of the apparatus shown in FIG. 3 is a schematic downward view of the extrusion mechanism provided in FIG. 1, FIG. 4 is a circuit configuration of controller 0, and FIG. 5 is a flowchart of an embodiment of the device of the present invention. FIG. 6 is a schematic 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 - Exit side feed plate 33 - Push roller LSI - 1st limit switch LS2 - 2nd limit switch Figure +j Figure 3 (a) (b) Figure j l

Claims (2)

[Claims] (1) A front lower roller and a rear lower roller arranged close to each other in parallel and driven to rotate counterclockwise, and a rear lower roller arranged close to above between these lower rollers and driven to rotate clockwise. and an upper roller that is inserted between the upper roller and the front lower roller, and then passed between the upper roller and the rear lower roller to longitudinally pass the angle material. In an angle bender that produces an annular member by circularly bending the angle members, the tips of the angle members are bent in a circular direction in the longitudinal direction, and the tips of the angle members are alternately crossed at positions just before they intersect. An angle bender characterized by having an extrusion roller that extrudes in a substantially vertical direction. (2) An inlet-side feed plate connected to a first limit switch is provided on the extrusion roller's entrance side for the angle material to pass through, and a second feed plate is provided on the exit side for the angle material to pass through.
An exit side feed plate connected to a limit switch is provided, and the inlet side feed plate and the exit side feed plate are tilted by the passage of the angle member to close the first limit switch and the second limit switch. , by closing the first limit switch, it is stored that there is an angle material; by closing the second limit switch, the extrusion roller is pushed out; and after the second limit switch is closed, a preset period of time has elapsed. 2. The angle bender according to claim 1, wherein the extrusion roller is later retracted and the extrusion roller is maintained in the retracted state during the closing operation of the first limit switch.