JP7120591B2 - Roll forming equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll forming apparatus for forming a tubular shape by sandwiching a plate material between a plurality of rolls and bending the plate material.

As a method for manufacturing a tubular body, a method is known in which a plate material is bent into a cylindrical shape by a roll forming device, and then two ends parallel to each other are joined by a welding device or the like. A roll forming apparatus includes a plurality of rolls including one main roll and one or more sub rolls, with their axial directions parallel to each other. The rectangular plate material is plastically deformed by bending and formed into a cylindrical shape when passing between the main roll and the sub roll.

As a conventional roll forming apparatus, there is a urethane roll forming apparatus provided with a sub-roll made of urethane that is softer than a main roll (see, for example, Patent Document 1). By pressing the sub-roll against the main roll, the plate material is passed through the portion of the peripheral surface of the sub-roll that is concavely deformed along the peripheral surface of the main roll. Urethane roll forming equipment is suitable for bending relatively thin plate materials, and can bend both ends of the plate material in an arc shape, but the main roll must be replaced in order to change the bending diameter. be. In the urethane roll forming apparatus, two support rolls are provided on the opposite side of the main roll with the sub-roll therebetween for the purpose of pressing the sub-roll against the main roll and preventing the sub-roll from bending.

As another conventional roll forming apparatus, there is a three-roll forming apparatus provided with two sub-rolls made of a material having the same hardness as that of the main roll (see, for example, Patent Document 2). The three-roll forming apparatus is suitable for relatively small-diameter bending, but the peripheral surfaces of the sub-rolls do not press against the peripheral surfaces of the main rolls across the plate material, so it is necessary to adjust the position of the sub-rolls relative to the main rolls. It is difficult to bend both ends of the plate into an arc while the bending diameter can be easily changed by .

Yet another conventional roll forming machine is a four roll forming machine with three secondary rolls of material of the same hardness as the main roll. The four-roll forming apparatus has a complicated structure because it has a total of four rolls, but it is suitable for bending a relatively large diameter. Since the plate is pressed against the main roll at , both ends of the plate can also be bent into an arc shape. Further, by adjusting the positions of two of the three sub-rolls excluding the central sub-roll with respect to the main roll, the bending diameter can be easily changed.

JP-A-2004-255462 JP 2013-252546 A

As described above, there are multiple types of roll forming equipment that are suitable for the thickness and bending diameter of plate materials, and in order to handle various materials and bending diameters, multiple roll forming equipment must be prepared. As a result, the equipment cost rises and a large installation space is required.

An object of the present invention is to make it possible to change the position of each of the four sub-rolls with respect to the main roll as appropriate, so that a single device can realize the roll arrangement of a plurality of types of roll forming devices, and the equipment cost can be reduced. To provide a roll forming apparatus capable of realizing a reduction in cost and a narrow installation space.

A roll forming apparatus of the present invention includes a main roll, first to third sub rolls, and a rotary drive section. The first sub-roll is arranged axially parallel to the main roll, and is pivotally supported so that the distance between the main roll and the main roll can be changed in a single radial direction of the main roll. The second and third sub-rolls are arranged with their respective axial directions parallel to the main roll within a plane orthogonal to the radial direction, and are separated from the main roll in the radial direction in each of the two regions sandwiching the radial direction. They are rotatably supported so that they can move toward and away from each other while being changeable and maintaining their respective distances in the radial direction the same . The rotation drive section supplies rotation to the first to third sub-rolls.

In the four-roll forming position, the first sub roll is arranged between the second sub roll and the third sub roll to form the main roll and the first sub roll in a single radial direction from the start to the end of forming the workpiece. The distance between the rolls is set to a length that allows a work of plate material to be sandwiched between them, and the distance between the main roll and each of the first to third sub-rolls is set to the thickness of the work. Rotation is supplied to the first to third sub-rolls. The work is deformed to a predetermined bending diameter while sequentially passing between the peripheral surface of the main roll, the peripheral surface of the second sub-roll, the peripheral surface of the first sub-roll, and the peripheral surface of the third sub-roll. be.

In the three-roll forming position, the first sub-roll is separated from the main roll from the start to the end of forming the workpiece, and the gap between the main roll and the first sub-roll in the single radial direction is increased to The length is such that the second and third sub-rolls can be arranged between them , and the end of the work that has passed between one of the second and third sub-rolls and the main roll is positioned between the other and the main roll. Supply rotation from the rotation drive unit to the first to third sub rolls so that the distance between the main roll and the second and third sub rolls is the thickness of the work by approaching the position where it is guided between do. The workpiece is deformed to a predetermined bending diameter while sequentially passing between the peripheral surface of the main roll and the peripheral surface of the second sub-roll and between the peripheral surface of the main roll and the peripheral surface of the third sub-roll. .

In this configuration, a fourth sub-roll made of urethane can be detachably arranged between the main roll and the second and third sub-rolls so that the axial direction is parallel to the main roll. At the urethane roll forming position, the distance between the main roll and the first sub roll in a single radial direction is set to a length that allows the second to fourth sub rolls to be arranged between them, and the fourth sub roll is pressed against the main roll. The second and third sub-rolls are arranged at the positions where the rotation is caused to rotate, and rotation is supplied to the first to third sub-rolls from the rotation drive section. By using a urethane roll that is softer than the main roll as the fourth sub roll, a predetermined amount of pressure is applied between the relatively thin plate workpiece and the peripheral surface of the main roll and the peripheral surface of the fourth sub roll while passing through the pressure contact portion between the peripheral surface of the main roll and the peripheral surface of the fourth sub roll. It can be deformed to a bending diameter.

Also, a first moving mechanism for moving the first sub-roll along a single radial direction, and each of the second and third sub-rolls contacting the main roll in each of two regions sandwiching the single radial direction. and a second and third moving mechanism for moving in a separating direction and a mutually contacting and separating direction. The positions of the first to third auxiliary rolls can be moved to positions according to the thickness, bending diameter, etc. of the work by means of the first to third moving mechanisms.

The first moving mechanism moves the first to third sub-rolls and the second and third moving mechanisms integrally along the radial direction, and the second and third moving mechanisms move the The rotation axis of each of the second and third sub-rolls may be moved along a first arc around the rotation axis of the first sub-roll. The distance between each of the second and third sub-rolls and the main roll and the distance between each other can be easily changed, and the positions of the first to third sub-rolls can be easily changed according to the thickness and bending diameter of the workpiece. can be moved.

Further, the rotation drive section includes a rotation transmission mechanism that transmits the rotation of the first sub roll to the second and third sub rolls, so that the first to third sub rolls can be rotated by a single drive section. can be done.

This rotation transmission mechanism includes a drive gear coaxially fixed to the rotation shaft of the first sub roll, and first and second driven gears coaxially fixed to the respective rotation shafts of the second and third sub rolls. , a first transmission gear that meshes with the driving gear and the first driven gear, a second transmission gear that meshes with the driving gear and the second driven gear, the rotation shafts of the second and third sub rolls, and the first and a first and a second support member that integrally support each of the transmission gear and the second transmission gear. A rotation transmission mechanism can be configured easily.

A ring gear arranged on a second circular arc centered on the rotation axis of the first sub-roll is provided, and the second and third moving mechanisms are respectively supported by the first and second support members. and a pinion gear that meshes with the ring gear, and a turning drive section that supplies rotation to the pinion gear. By supplying rotation to the pinion gear from the turning drive, each of the second and third sub rolls can be moved along the first arc.

First and second support rolls, each of which is coaxially supported with the pinion gear, are always on the second and third sub rolls at positions opposite to the main roll with respect to the second and third sub rolls. First and second support rolls in contact with each other, and third and fourth support rolls respectively supported coaxially with the first and second transmission gears, the main rolls sandwiching the second and third sub rolls. Third and fourth support rolls that are always in contact with the second and third sub-rolls on the opposite side of the roll and always in contact with the first sub-roll on the opposite side of the main roll with the first sub-roll interposed therebetween; , may be provided. Axial deflection of the first to third sub-rolls can be prevented without complicating the structure.

According to the present invention, it is possible to realize the roll arrangement of a plurality of types of roll forming apparatuses with a single apparatus, thereby realizing a reduction in equipment costs and a narrow installation space.

(A) to (D) are diagrams for explaining the configuration and function of the roll forming apparatus according to the first embodiment of the present invention. (A) to (D) are diagrams for explaining the configuration and function of a roll forming apparatus according to a second embodiment of the present invention. (A) and (B) are diagrams showing different configurations of the roll forming apparatus according to the second embodiment. (A) to (C) are a plan view, a front view and a side view of a roll forming apparatus according to a third embodiment of the present invention. It is a side view which shows the structure of the principal part of the roll forming apparatus which concerns on the said 3rd Embodiment. It is a side view which shows the structure of the principal part at the time of making the roll forming apparatus which concerns on the said 3rd Embodiment into a four-roll forming apparatus. It is a side view which shows the structure of the principal part at the time of making the roll forming apparatus which concerns on the said 3rd Embodiment into a 3-roll forming apparatus. It is a side view which shows the structure of the principal part at the time of using a urethane roll forming apparatus as the roll forming apparatus which concerns on the said 3rd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION A roll forming apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1A, a roll forming apparatus 100 according to the first embodiment of the present invention includes a main roll 1, a first sub roll 2, a second sub roll 3, a third sub roll 4, a first It has an elevating mechanism 5, a second elevating mechanism 6, a third elevating mechanism 7, a first displacement mechanism 8, a second displacement mechanism 9, a base 10, and motors M1 to M3.

The main roll 1 and sub-rolls 2 to 4 are, for example, metal columns. The main roll 1 is pivotally supported by a frame (not shown) in a fixed position in the vertical and horizontal directions. The main roll 1 does not necessarily have to be pivotally supported, and its rotation can be restricted.

The first sub-roll 2 is pivotally supported by a frame (not shown) via a support member 21 so as to be vertically movable along the radial direction R1 of the main roll 1 . The sub-rolls 3 and 4 are pivotally supported by a frame (not shown) via support members 31 and 41, respectively, so as to be vertically and horizontally movable in the left and right regions sandwiching the radial direction R1.

The sub-rolls 2-4 are supplied with rotation in both forward and reverse directions from motors M1-M3, which are rotary drive units of the present invention. In addition, the rotation drive section can also be composed of, for example, a single motor that supplies rotation to the sub-roll 2 and a transmission member that transmits the rotation of the sub-roll 2 to the sub-rolls 3 and 4 .

The elevating mechanism 5 corresponds to the first moving mechanism of the present invention, and has a ball screw 51 that is screwed into the female threaded portion of the support member 21 . The ball screw 51 is axially supported by the base 10 with its axial direction vertical, and is rotated about its axis by a motor (not shown). The rotation of the support member 21 is restricted, and the forward and reverse rotation of the ball screw 51 causes the support member 21 to move up and down together with the first sub-roll 2 along the radial direction R1.

The elevating mechanisms 6 and 7 are provided with ball screws 61 and 71 screwed into the female threaded portions of the support members 31 and 41, respectively. The ball screws 61 and 71 are rotatably supported by the base 10 with their axes set vertically, and are rotated forward and reverse around their axes by a motor (not shown). The support members 31 and 41 are restricted in rotation, and move up and down together with the sub-rolls 3 and 4 along the radial direction R1 by forward and reverse rotation of the ball screws 61 and 71 .

The displacement mechanisms 8 and 9 have elongated holes 80 and 90 extending horizontally from the support members 31 and 41, respectively. The rotary shafts 32 and 42 of the sub-rolls 3 and 4 are fitted in the elongated holes 80 and 90, respectively. By displacing the rotary shafts 32 and 42 within the elongated holes 80 and 90 and fixing them with fixing members (not shown), the sub-rolls 3 and 4 move horizontally. The displacement mechanisms 8 and 9 can each be composed of a ball screw whose axial direction is horizontal and a motor that supplies rotation to the ball screw.

The lifting mechanism 6 and the displacement mechanism 8 correspond to the second moving mechanism of the invention, and the lifting mechanism 7 and the displacement mechanism 9 correspond to the third moving mechanism of the invention.

By appropriately operating the elevating mechanisms 5 to 7 and the displacement mechanisms 8 and 9, the sub roll 2 can be arranged at any position in the radial direction R1 below the main roll 1, and the sub rolls 3 and 4 can be moved in the radial direction R1. can be placed at any position in the left and right regions of Thereby, the relative positions of the sub rolls 2 to 4 with respect to the main roll 1 can be changed.

As shown in FIG. 1(B), sub-rolls 2 to 4 are placed at positions where the work W1 is sandwiched between them and the main roll 1 in the thickness direction, and rotated in the direction of the arrow to form a so-called four-roll roll. A forming apparatus can be constructed, and a relatively thick work W1 can be wrapped around the peripheral surface of the main roll 1 and formed into a cylindrical shape.

As shown in FIG. 1(C), the sub-roll 2 is sufficiently spaced from the main roll 1, and the sub-rolls 3 and 4 are arranged at positions where the work W2 is sandwiched between them in the thickness direction. By rotating it in the direction of the arrow, a so-called three-roll forming apparatus can be configured, and a relatively thin work W2 can be wound around the peripheral surface of the main roll 1 and formed into a cylindrical shape.

As shown in FIG. 1(D), the sub-rolls 2 to 4 are sufficiently separated from the main roll 1, a urethane roll 11 is inserted as an example between the main roll 1 and the sub-rolls 3 and 4, and the sub-rolls By rotating the rolls 3 and 4 in the direction of the arrows, a so-called urethane roll forming apparatus can be constructed, and a sufficiently thin work W3 can be wrapped around the peripheral surface of the main roll 1 and formed into a cylindrical shape.

As shown in FIGS. 2A to 2D, a roll forming apparatus 200 according to the second embodiment of the present invention integrally raises and lowers the sub rolls 2 to 4 along the radial direction R1, 3 and 4 are moved along an arc C1 around the axis of rotation of the sub-roll 2 . Therefore, the roll forming apparatus 200 has a configuration different from that of the roll forming apparatus 100 as the first to third moving mechanisms of the present invention. Arc C1 corresponds to the first arc of the present invention.

As shown in FIG. 2(A), the roll forming apparatus 200, as a configuration corresponding to the second and third moving mechanisms of the present invention, fixedly supports the sub-roll 2 and rotates the sub-roll along an arc C1. A subframe 60 is provided with elongated holes 261 and 262 into which the 3 and 4 rotating shafts 32 and 42 are fitted. The positions of the rotary shafts 32 and 42 in the long holes 261 and 262 are fixed by fixing members (not shown). As the first moving mechanism of the present invention, ball screws 52 and 53 are provided which are screwed into female screw portions 63 and 64 extending from the sub-frame 60 with the axial direction vertical.

By forward and reverse rotation of the ball screws 52 and 53, the sub-frame 60 moves up and down together with the sub-rolls 2-4 along the radial direction R1. Further, by displacing the rotating shafts 32 and 42 within the long holes 261 and 262, the sub-rolls 3 and 4 move along the arc C1 centering on the rotating shaft of the sub-roll 2, sandwiching the radial direction R1. The left and right regions are displaced horizontally and vertically.

In the example shown in FIG. 2A, rotation is supplied from individual motors to each of the sub-rolls 2-4.

With this configuration, the sub-rolls 2 to 4 are placed at a position constituting a so-called four-roll forming device as shown in FIG. , as shown in FIG. 2(D), a urethane roll 11 can be added to form a so-called urethane roll forming apparatus.

As shown in FIG. 3A, the roll forming apparatus 200 includes a driving gear 23 coaxially fixed to the sub roll 2 and driven gears 33 and 43 coaxially fixed to the sub rolls 3 and 4, respectively. , a transmission gear 71 that always meshes with the drive gear 23 and the driven gear 33 and a transmission gear 72 that always meshes with the drive gear 23 and the driven gear 43 may be provided. The drive gear 23, the driven gears 33 and 43, and the transmission gears 71 and 72 correspond to the rotation transmission mechanism of this invention.

The transmission gears 71 and 72 are supported so as to move along an arc different from the arc C1 around the rotation axis of the sub roll 2 as the sub rolls 3 and 4 move along the arc C1. . By supplying rotation from a single motor M1 to the sub-roll 2 and transmitting the rotation of the sub-roll 2 to the sub-rolls 3 and 4, the number of motors required to rotate the sub-rolls 2 to 4 in the same direction is can be reduced.

As shown in FIG. 3B, the roll forming apparatus 200 can also include support rolls 81-84. The support rolls 81 and 82 are always in contact with the sub-roll 3 on the opposite side of the main roll 1 with the sub-roll 3 interposed therebetween. The support rolls 83 and 84 are always in contact with the sub-roll 4 on the opposite side of the main roll 1 with the sub-roll 4 interposed therebetween. The support rolls 81 and 83 are always in contact with the sub-roll 2 on the opposite side of the main roll 1 with the sub-roll 2 interposed therebetween.

The support rolls 81 and 82 are supported so as to move along arcs different from the arc C1 around the rotation axis of the sub roll 2 as the sub roll 3 moves along the arc C1. The support rolls 83 and 84 are supported so as to move along arcs different from the arc C1 about the rotational axis of the sub roll 2 as the sub roll 4 moves along the arc C1.

When the main roll 1 and the sub rolls 2 to 4 are long in the axial direction, the support rolls 81 to 84 can prevent the sub rolls 2 to 4 from bending in the axial direction.

A roll forming apparatus 300 according to a third embodiment of the present invention shown in FIGS. It differs from the roll forming apparatus 200 shown in FIG. 2(A) in that separate mechanisms are provided as the second and third moving mechanisms.

As shown in FIGS. 4A to 4C and 5, the roll forming device 300 includes a main roll 1, a first sub roll 2, a second It has two sub-rolls 3, a third sub-roll 4, and support rolls 81-84. The roll forming apparatus 300 further includes an elevating motor 310, a ball screw 320, an elevating table 330, a rotating motor 340, a driving gear 351, driven gears 352 and 353, transmission gears 354 and 355, a ring gear 361, pinion gears 362 and 363, a moving It has motors 371 and 372 and mounting plates 381 and 382 .

Note that the support rolls 81 to 84 can be omitted on condition that the sub rolls 2 to 4 do not bend in the axial direction.

The lifting motor 310, the rotating motor 340, and the moving motors 371 and 372 are all servo motors capable of rotating and driving in both forward and reverse directions with an accurate amount of rotation.

Both ends of the main roll 1 are pivotally supported by left and right frames 391 and 392, respectively. The lift motor 310 is fixed to the central portion of the base 10 . The ball screw 320, the lift table 330, the driving gear 351, the driven gears 352 and 353, the ring gear 361, the pinion gears 362 and 363, and the mounting plates 381 and 382 are provided in pairs near the left and right frames 391 and 392, respectively. there is

The rotation of the lifting motor 310 is transmitted to the gear box 321 on the frame 391 side via the rotating shaft 311 arranged horizontally in the axial direction. A ball screw 320 arranged with its axial direction vertical is screwed into a fixed nut in a gear box 321 and is movable up and down. there is The upper end of the ball screw 320 is fixed to the lift table 330 . The frame 392 side is also configured in the same manner. By rotating the rotating shaft 311 of the lifting motor 310 in forward and reverse directions, the ball screw 320 moves up and down together with the lifting table 330 . The lifting motor 310, the ball screw 320, the fixed nut in the gear box 321, and the lifting table 330 correspond to the first moving mechanism of the present invention.

On the frame 391 side, the lift table 330 carries bearings for the ring gear 361, the rotary motor 340, the moving motors 371 and 372, and the rotary shafts 22, 32, 42 of the sub-rolls 2-4, respectively. Although not shown, bearings for the ring gear 361 and sub-rolls 2 to 4 are mounted on the lifting platform 330 on the frame 392 side.

The rotating shaft of the rotary motor 340 is coaxially fixed to the rotating shaft 22 of the sub-roll 2 . Drive gears 351 are fixed to both ends of the rotating shaft 22 of the sub-roll 2, driven gears 352 are fixed to both ends of the rotating shaft 32 of the sub-roll 3, and the rotating shaft 42 of the sub-roll 4 is fixed. Driven gears 353 are fixed to both ends. The rotary motor 340 corresponds to the rotary drive section of the present invention.

A transmission gear 354 is fixed to both ends of a rotation shaft 811 of the support roll 81, a pinion gear 362 is fixed to both ends of a rotation shaft 821 of the support roll 82, and a rotation shaft 831 of the support roll 83 is fixed. Transmission gears 355 are fixed to both ends, and pinion gears 363 are fixed to both ends of the rotating shaft 841 of the support roll 84 .

On the frame 391 side, the transmission gear 354 meshes with the drive gear 351 and the driven gear 352 , and the transmission gear 355 meshes with the drive gear 351 and the driven gear 353 . The driving gear 351 and the driven gears 352 and 353 have the same pitch diameter and the same number of teeth. The frame 392 side is similarly constructed. By driving the rotary motor 340, the sub rolls 2 to 4 rotate in the same direction at the same speed. The drive gear 351, driven gears 352 and 353, and transmission gears 354 and 355 correspond to the rotation transmission mechanism of the invention.

The pinion gears 362 and 363 mesh with the ring gear 361 on the frame 391 side. The ring gear 361 can move up and down within the frame 391 via guide members 3911 and rails 3912 . The ring gear 361 has the axis of the sub roll 2 as the center of the pitch circle. The frame 392 side is similarly constructed.

On the frame 391 side, the bearings of the rotating shaft 32 of the sub roll 3 and the rotating shafts 811 and 821 of the support rolls 81 and 82 are fixed to the mounting plate 381, and the rotating shaft 42 of the sub roll 4 and the support rolls 83 and The respective bearings of the rotating shafts 831 and 841 of 84 are fixed to the mounting plate 382 . The mounting plates 381 and 382 are supported by the rotary shaft 22 of the sub roll 2 . The frame 392 side is similarly constructed.

In this example, the diameters of the auxiliary rolls 2 to 4 are equal to the pitch circle diameters of the gears 351 to 353 indicated by the dashed lines in FIG. 5, and the diameters of the support rolls 81 and 83 are indicated by the dashed lines in FIG. The diameters of the support rolls 82 and 84 are made equal to the pitch circle diameters of the gears 354 and 355, and the diameters of the support rolls 82 and 84 are made equal to the pitch circle diameters of the gears 362 and 363 indicated by the dashed line in FIG.

Therefore, the support roll 81 is in contact with the peripheral surfaces of the sub-rolls 2 and 3, the support roll 82 is in contact with the peripheral surface of the sub-roll 3, the support roll 83 is in contact with the peripheral surfaces of the sub-rolls 2 and 4, and the support rolls 84 contacts the peripheral surface of the sub-roll 4 . The support rolls 81-84 can be omitted on condition that the sub-rolls 2-4 do not bend.

On the frame 391 side, the rotation of the moving motor 371 is transmitted to the pinion gear 362 through the gearbox 3711 in the horizontal plane, and the rotation of the moving motor 372 is transmitted through the gearbox 3721 in the horizontal plane. are orthogonal to each other and transmitted to the pinion gear 363 . The pinion gears 362 and 363 are meshed with the ring gear 361 to revolve on an arc around the rotation axis 22 of the sub roll 2 along the ring gear 361 while rotating. This revolution causes the mounting plates 381 and 382 to rotate about the rotary shaft 22 of the sub-roll 2 together with the sub-rolls 3 and 4 . The mounting plates 381 and 382 correspond to the first and second pivot members of this invention. Also, the movement motors 371 and 372 correspond to the turning drive section of the present invention.

The moving motors 371 and 372 and the gear boxes 3711 and 3721 are supported by the mounting plate 381 and rotate together with the mounting plate 381 as the pinion gears 362 and 363 revolve. Regardless of the revolution positions of the pinion gears 362 and 363, the rotation of the movement motors 371 and 372 is always supplied to the pinion gears 362 and 363 from the gearboxes 3711 and 3721.

Since the pitch diameter of the pinion gears 362 and 363 is determined according to the pitch diameter and the number of teeth of the ring gear 361, the pinion gears 362 and 363 are not necessarily arranged coaxially with the support rolls 82 and 84. However, it may be pivotally supported by mounting plates 381 and 382 separately from the support rolls 82 and 84 .

By driving the lifting motor 310, the auxiliary rolls 2 to 4 are lifted and lowered along the radial direction R1 together with the lifting table 330. FIG. By driving the movement motors 371 and 372, the sub-rolls 3 and 4 move along the arc C1.

As shown in FIG. 6, from the state shown in FIG. 5, the elevation motor 310 (not shown) is driven forward to raise the sub-rolls 2 to 4 together with the elevation base 330, and the movement motors 371 and 372 (not shown) are rotated in opposite directions. By driving in the direction to raise the mounting plates 381 and 382, the sub-rolls 3 and 4 are raised along the arc C1. The roll forming apparatus 300 can constitute a so-called four-roll forming apparatus in which a rectangular plate-like work is sandwiched between the main roll 1 and sub rolls 2-4. By driving the rotation motor 340 (not shown) from this state, the sub-rolls 2 to 4 are rotated in the same direction at the same speed by the drive gear 351, transmission gears 354 and 355, and driven gears 352 and 353.

As shown in FIG. 7, from the state shown in FIG. 5, the lifting motor 310 (not shown) is reversely driven to lower the auxiliary rolls 2 to 4 together with the lifting table 330, and the moving motors 371 and 372 (not shown) are driven in opposite directions. to lift the mounting plates 381 and 382, thereby lifting the sub-rolls 3 and 4 along the arc C1. The roll forming apparatus 300 can constitute a so-called three-roll forming apparatus in which a rectangular plate-shaped work is sandwiched between the main roll 1 and the sub rolls 3 and 4 . By driving the rotation motor 340 (not shown) from this state, the sub-rolls 2 to 4 are rotated in the same direction at the same speed by the drive gear 351, transmission gears 354 and 355, and driven gears 352 and 353.

As shown in FIG. 8, from the state shown in FIG. 7, the lift motor 310 (not shown) is reversely driven to lower the sub-rolls 2 to 4 together with the lift table 330, and the space between the main roll 1 and the sub-rolls 3 and 4 is lowered. The urethane roll 11 is inserted into the . The roll forming apparatus 300 can constitute a so-called urethane roll forming apparatus in which a rectangular plate-like work is sandwiched between the main roll 1 and the urethane roll 11 . By driving the rotation motor 340 (not shown) from this state, the sub-rolls 2 to 4 are rotated in the same direction at the same speed by the drive gear 351, transmission gears 354 and 355, and driven gears 352 and 353, and the urethane rolls 11 rotates in the opposite direction to the sub-rolls 2-4.

In this example, since the sub rolls 2 to 4 have the same diameter as the pitch circles of the gears 351 to 353, they are indicated by dashed lines in FIGS. 6 to 8 for convenience.

From the state shown in FIG. 6 or 7, by selectively driving the moving motors 371 and 372 to change the distance between the main roll 1 and the sub-rolls 3 and 4, the rectangular plate-shaped work can be moved to a shape other than a circular cross section. It can also be formed into a substantially polygonal or elliptical cross-sectional shape.

As described above, according to the roll forming apparatus 300, it is possible to realize the roll arrangement of a plurality of types of roll forming apparatuses with a simple configuration, and it is possible to reduce the equipment cost and narrow the installation space.

The description of the above-described embodiments should be considered illustrative in all respects and not restrictive. The scope of the invention is indicated by the claims rather than the above-described embodiments. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and range of equivalents of the claims.

1-main roll 2-first sub-roll 3-second sub-roll 4-third sub-roll 5-first lifting mechanism (first moving mechanism)
6-Second lifting mechanism (second moving mechanism)
7-Third lifting mechanism (third moving mechanism)
8-First displacement mechanism (second movement mechanism)
9- Second displacement mechanism (third movement mechanism)
11- Urethane rolls M1 to M3- motor (rotational drive unit)

Claims (8)

a main roll;
a first sub-roll arranged in parallel with the main roll in the axial direction and pivotally supported so that the interval between the main roll and the main roll can be changed in a single radial direction of the main roll;
are arranged with their axial directions parallel to the main rolls in a plane perpendicular to the radial direction, and the gap between the main rolls in the radial direction can be changed in each of the two regions sandwiching the radial direction, and the second and third sub-rolls that are pivotally supported so as to be able to contact and separate from each other while maintaining the same distance in the radial direction ;
a rotation drive unit that supplies rotation to the first to third sub rolls;
with
The first sub roll is arranged between the second sub roll and the third sub roll from the start to the end of forming the work, and the main roll and each of the first to third sub rolls are arranged. A four-roll forming position where the interval is the thickness of the work, and between the start and end of forming the work, the first sub-roll is separated from the main roll, and the second sub-roll and the third sub-roll are separated. The distance between the main roll and each of the second and third sub-rolls is reached to a position where the end of the work passing between the one and the main roll is guided between the other and the main roll . A roll forming apparatus in which the first to third auxiliary rolls are arranged at any one of the three roll forming positions where is the thickness of the work. A fourth roll made of urethane is detachably arranged between the main roll and the second and third rolls with the axial direction parallel to the main roll,
The four-roll forming position, the three-roll forming position, and the first sub-roll are separated from the main roll, and the fourth roll is placed between the main roll and each of the second and third sub-rolls. 2. The roll forming apparatus according to claim 1, wherein the first to third sub rolls are arranged at one of urethane roll forming positions sandwiching the sub rolls . a first moving mechanism for moving the first sub-roll along the radial direction;
a second and third moving mechanism for moving each of the second and third sub-rolls in a direction to contact and separate from the main roll and a direction to contact and separate from each other in each of the two regions sandwiching the radial direction;
The roll forming apparatus according to claim 1 or 2, further comprising: The first moving mechanism integrally moves the first to third sub-rolls and the second and third moving mechanisms along the radial direction,
4. Said 2nd and 3rd moving mechanism moves each rotating shaft of said 2nd and 3rd sub-roll along the 1st circular arc centering on the rotating shaft of said 1st sub-roll. A roll forming apparatus as described. 5. The roll forming apparatus according to claim 4, wherein the rotation drive section includes a rotation transmission mechanism that transmits rotation of the first sub-roll to the second and third sub-rolls. The rotation transmission mechanism includes a drive gear coaxially fixed to the rotation shaft of the first sub roll, and first and second drive gears coaxially fixed to the respective rotation shafts of the second and third sub rolls. a driven gear, a first transmission gear meshing with the driving gear and the first driven gear, a second transmission gear meshing with the driving gear and the second driven gear, and the second and third sub rolls, respectively 6. The roll forming apparatus according to claim 5, further comprising a rotating shaft, and first and second shaft support members that integrally support the first and second transmission gears, respectively. A ring gear arranged on a second arc centered on the rotation axis of the first sub roll,
Each of the second and third moving mechanisms includes a pinion gear that is pivotally supported by each of the first and second pivot members and meshes with the ring gear, and a turning drive section that supplies rotation to the pinion gear. 7. The roll forming apparatus of claim 6, comprising: First and second support rolls are coaxially supported with the pinion gear, respectively, and the second and third support rolls are positioned opposite to the main roll with the second and third sub rolls interposed therebetween . first and second support rolls in constant contact with the sub roll;
Third and fourth support rolls, which are respectively supported coaxially with the first and second transmission gears, are positioned opposite to the main roll with the second and third sub rolls interposed therebetween. third and fourth support rolls that always abut on the second and third sub rolls and always abut on the first sub roll at a position on the opposite side of the main roll with the first sub roll interposed therebetween; The roll forming apparatus according to claim 7.

Images