JPH1177170A - Roll bender - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll bender which is suitable to a relatively small scale roll forming and can reduce labor required for working, equipment cost and a space for equipment installation. SOLUTION: A roll bender which is installed to a press break 11 is provided with a lower roll 3 consisting of material having prescribed elasticity such as urethane, an upper roll 2 consisting of material which is not easily deformed such as steel, a motor 5 with a reduction gear rotating the lower roll 3, a coupling 6 which transmits the rotation of an external output shaft of the motor 5 with the reduction gear to the lower roll 3, a fixed bearing 2b which rotatably and attachably detachably supports one end in the longitudinal direction of the upper roll 2, a movable bearing 2a which rotatably undetachably supports the other end in the longitudinal direction of the upper roll 2, and a guide rail 4 which supports the movable bearing 2a so as to linearly move. A steel plate is caught in between the lower roll 3 and the upper roll 2 with which the lower roll 3 is pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll bender, and more particularly to a roll bender for bending a steel sheet into a roll.

[0002]

2. Description of the Related Art Conventionally, a roll bender provided with three rollers as shown in FIGS. 9 and 10 is often used. FIG. 9 is an enlarged sectional view showing a state in which a steel plate is formed into a roll shape by a roll bender having three rollers, and FIG. 10 is a roll shape obtained by a roll bender having three rollers following FIG. It is an expanded sectional view showing the state where it is formed and processed. Two of the three rollers sandwich the steel sheet and send it out in a predetermined direction, and the other roller adjusts the curvature of the steel sheet to be bent.

A roll bender with three rollers is:
Feed rollers 41 and 42 which are two of the three rollers
Are vertically arranged substantially parallel to each other with the distance between the outer peripheral surfaces substantially equal to the thickness of the steel plate to be subjected to roll bending, and the lower feed roller of the feed rollers 41 and 42 The rotational force is directly transmitted to only 42 by the motive power.

When the feed roller 42 rotates clockwise as shown by an arrow 42a in FIG. 9 when viewed from the lateral direction, when a steel plate 44 is inserted between the feed rollers 41 and 42 from the left side, the steel plate 44 Move in the direction. At this time,
The rotation of the feed roller 42 is transmitted to the feed roller 41 by the movement of the steel plate 44, and the feed roller 41 rotates counterclockwise as shown by an arrow 41a.

[0005] A guide roller 43 is disposed in front of the progress of the steel sheet 44 so that the rotation axis is parallel to the rotation axes of the feed rollers 41 and 42. The rotation axis of the guide roller 43 is located at a position slightly lower than the height of the steel plate 44 sent out. Therefore, when the tip of the steel plate 44 reaches the guide roller 43, the steel plate 44 is turned upward along the circumferential curved surface of the guide roller 43 and is urged. The steel plate 44 that has turned upward above the guide roller 43 travels upward using the guide roller 43 as a guide. Following the upward movement of the steel plate 44, the guide roller 43 turns clockwise as shown by an arrow 43a. Rotate.

At this time, the portion of the steel plate 44 which receives the largest bending moment is substantially near the center between the portion sandwiched between the feed rollers 41 and 42 and the portion in contact with the guide roller 43. Therefore, the portion that receives the largest bending moment is bent. However, steel plate 4
4 sequentially changes the position in a predetermined direction, and accordingly, the portion of the steel plate 44 which receives the largest bending moment also changes its position sequentially, so that the steel plate 44 is finally formed into a roll shape as shown in FIG. You. Since the roll bending of the steel plate 44 is performed around the feed roller 41, the feed roller 41 is inserted after the roll bending.
Therefore, in order to release the steel plate 44 formed by roll bending from the feed roller 41, it is necessary to separate from the bearing supporting the feed roller 41. The curvature of the roll bending of the steel plate 44 is changed by changing the position of the guide roller 43 before and after the direction in which the steel plate 44 is sent out.

Further, since the roll bending of the steel plate 44 is not started until the tip reaches the guide roller 43, a predetermined section near the tip becomes a flat portion 44a where no roll bending is performed. Similarly, the vicinity of the rear end of the steel plate 44 also becomes a flat portion 44b because it is opened from between the feed rollers 41 and 42 before roll bending.

[0008]

However, as described above, a roll bender having three rollers has a width of 1 m.
In many cases, the steel plate 44 is configured to be capable of performing the roll bending forming process so that the total weight of the steel plate 44 is so heavy that the handling is inconvenient. For this reason, in order to release the rolled steel plate 44 from the feed roller 41, the feed roller 41 having a weight of several tens of kilograms had to be separated from the bearing, which was a very heavy labor. .

Further, since flat portions 44a and 44b are formed near the front and rear ends of the rolled steel plate 44, the flat portions 44a and 44b are required to form a complete roll.
a, 44b must be cut, or a curved surface must be formed manually, which requires a great deal of labor and time.

In particular, when forming and processing a relatively small-sized roll having a length of about several centimeters to several tens of centimeters, it is irrational in terms of labor costs to take such labor as described above. Equipment of such a scale was not necessary. for that reason,
The manufacturing cost is unnecessarily increased, and the space occupied by the equipment is unnecessarily large.

Accordingly, an object of the present invention is to provide a roll bender which is suitable for a relatively small-scale roll forming process and which can reduce the labor required for the operation, the equipment cost, and the installation space for the equipment.

[0012]

According to a first aspect of the present invention, there is provided a roll bender mounted on a press brake for bending and forming a steel sheet by a crushing operation between an upper press member and a lower press member. The lower roller, which is made of a material having a predetermined elasticity such as urethane and is attached detachably to the lower press member while keeping the rotating shaft substantially horizontal, and the rotating shaft made of a material that is not easily deformed, such as steel, is used as the rotating shaft. An upper roller that is detachably assembled to the upper press member so as to face the lower roller while keeping parallel to the rotation axis of the lower roller, and that rotates about a rotation axis in a mounted state on the upper press member; Power means for rotating the lower roller; and end opening means for opening one of both ends in the longitudinal direction of the upper roller from a bearing.

Therefore, according to the roll bender of the first aspect of the present invention, since the roll bender is mounted on the press brake, the space occupied by the press brake previously installed in the factory can be directly used as the installation space for the roll bender. . When a steel plate is sandwiched between the lower roller and the upper roller with a predetermined pressing force, the lower roller is made of a material having a predetermined elasticity such as urethane, so that the outer peripheral curved surface is formed along the outer peripheral curved surface of the upper roller. As a result, the steel plate is curved in accordance with the shape of the deformed outer peripheral surface of the lower roller. Then, when the lower roller is rotated by the power means as it is, the entire steel plate is bent into a roll shape, and after the roll bending, the upper roller is inserted and supported. Thereafter, when one of the longitudinal ends of the upper roller is opened from the bearing by the end opening means, the steel sheet formed by roll bending is separated from the upper roller. In addition, the roll-shaped bending of the steel sheet starts as soon as the steel sheet to be formed starts to be inserted between the lower roller and the upper roller, and is performed until the sheet is released from between the lower roller and the upper roller. Therefore, a flat portion does not remain in the formed steel sheet, and substantially complete roll processing is performed in all regions. Further, to change the curvature of the curved surface of the steel sheet formed by roll bending, the distance between the upper press member and the lower press member of the press brake is changed to change the degree of the upper roller pressing and deforming the lower roller. Can be done by

According to a second aspect of the present invention, in the roll bender of the first aspect, the power means can rotate the lower roller in both forward and reverse directions.

Therefore, according to the roll bender of the second aspect of the invention, in addition to the operation of the roll bender of the first aspect, the steel plate is reciprocated back and forth while being pressed between the lower roller and the upper roller. Can be.

A roll bender according to a third aspect of the present invention is the roll bender according to any one of the first and second aspects, wherein the power means reduces the number of rotations of the motor and the drive shaft of the motor at a predetermined ratio. And a power transmission means for transmitting the rotation of the external output shaft of the speed reducer to the lower roller.

Here, the power transmission means includes a coupling, but may be a gear-shaped gear, bevel gear, chain, shaft or the like.

Therefore, according to the roll bender of the third aspect of the invention, in addition to the operation of the roll bender of the first or second aspect, the rotational speed of the electric motor is reduced by the speed reducer, and the power transmission means is provided. Thus, the rotation of the lower roller becomes the optimum rotation speed for the roll forming operation of the steel sheet.

A roll bender according to a fourth aspect of the present invention is the roll bender according to the third aspect, wherein the power transmission means is a coupling.

Therefore, according to the roll bender of the invention of claim 4, in addition to the function of the roll bender of claim 3, since the power transmission means is a coupling, the power transmission means is a gear-shaped gear or a bevel gear. The power transmission means is more durable with respect to the load received during the roll forming operation of the steel plate than when other types such as a chain and a shaft are used. Also, the power means and the lower roller can be easily separated and connected together, and the power means and the lower roller can be detached and attached to each other when detached from the press brake.

A roll bender according to a fifth aspect of the present invention is the roll bender of the third aspect, wherein the power transmission means is a plurality of meshing gears.

According to the roll bender according to the fifth aspect of the present invention, in addition to the function of the roll bender according to the third aspect, the power means and the lower roller can be separated and connected to each other. Sometimes, the power means and the lower roller can be attached and detached in a state where they are separated from each other.

According to a sixth aspect of the present invention, there is provided the roll bender according to any one of the first to fifth aspects, wherein the end opening means is capable of rotating one end of the upper roller in the longitudinal direction and attaching and detaching it. A fixed bearing detachably attached to the upper press member that pivotally supports the movable roller; a movable bearing that pivotally and irremovably supports the other end of the upper roller in a longitudinal direction; A guide rail detachably attached to the upper press member that supports the linear presser so as to be able to move linearly in the length direction.

Therefore, according to the roll bender of the invention of claim 6, in addition to the operation of any one of the roll benders of claims 1 to 5, the movable bearing is separated from the fixed bearing by using the guide rail as a guide. When it is moved in the direction, the upper roller moves integrally with the movable bearing and separates from the fixed bearing, so that the steel plate formed by roll bending can be separated from the upper roller.

A roll bender according to a seventh aspect of the present invention is the roll bender according to any one of the first to sixth aspects, further comprising a feed guide for feeding the steel sheet between the lower roller and the upper roller. is there.

Therefore, according to the roll bender of the invention of claim 7, in addition to the action of the roll bender of any one of claims 1 to 6, the steel sheet to be roll-formed is optimally formed for roll bending. The trajectory can be fed to the forming position between the lower roller and the upper roller.

[0027]

Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a roll bender according to the first embodiment of the present invention.

As shown in FIG. 1, the roll bender 1 of the present embodiment is composed of a plurality of divided parts, each part being mounted on a press brake 11.

The press brake 11 is a device having an upper press member 12 and a lower press member 13 each of which has one of upper and lower opposed surfaces of a strip having a predetermined width. The steel plate is bent by a crushing operation between the opposing surfaces of the lower press member 13.

The roll bender 1 mounted on the press brake 11 includes a lower roller 3 and an upper roller 2.
And power means for rotating the lower roller 3.

The lower roller 3 is made of a material having a predetermined elasticity, such as urethane, and has both ends of the rotating shaft supported by fixed bearings 3a and 3b in the left and right direction from the front. The rotation axis of the roller 3 is kept substantially horizontal. Each of the fixed bearings 3 a and 3 b is fixed to the lower press member 13 of the press brake 11 by the feed guide 7.

The feed guide 7 includes a guide base 7a made of a substantially flat iron plate, and a fixed part 7e formed by bending a part of the guide base 7a near an end portion into a step shape. The fixing portion 7e is screwed to the side surface on the front side from the front of the lower press member 13 with a bolt 8 so that the guide table 7a is horizontal. A rear portion of the upper surface of the lower press member 13 is formed with a belt-like projection from the front, and the fixed bearings 3a and 3b are sandwiched between the protrusion of the lower press member 13 and the fixing portion 7e. I have.

The guide table 7a is provided with three groove-shaped guide holes 7c each having a predetermined width and extending in the width direction and arranged in parallel at substantially equal intervals in the front-rear direction. A substantially rod-shaped guide rod 7b is arranged over each guide hole 7c. The guide rod 7b is screwed at the position of each guide hole 7c with a bolt 7d.

At this time, the height of the upper surface of the guide table 7a is
The guide rod 7b is set on the upper surface of the guide base 7a substantially perpendicular to the direction in which the guide hole 7c extends, which is the height near the uppermost part of the outer peripheral curved surface of the lower roller 3. Therefore, the steel plate to be subjected to the roll bending is moved in parallel to the lower roller 3 by pushing the upper end of the guide table 7a from the front to the rear by bringing the end in the width direction into contact with the guide rod 7b.

The three guide holes 7c are provided on the guide table 7a.
The guide rod 7b can move left and right by loosening the bolt 7d. By changing the position of the guide bar 7b in the left-right direction in accordance with the width of the steel sheet to be subjected to roll bending, the position in the width direction can be adjusted to an optimum position.

The fixed bearing 3b of the rotating shaft of the lower roller 3
The shaft which is supported by the shaft is projected further forward after being supported by the fixed bearing 3b, and the motor 5 with a reduction gear is fixed further to the front thereof near the upper surface of the lower press member 13. I have. A fixing member 9 made of a steel plate bent in an L-shape is fixed to a lower portion of the motor 5 with a reduction gear, and the fixing member 9 is screwed to the front side of the lower press member 13 of the press brake 11 with a bolt 9a. By stopping, the motor 5 with reduction gear is fixed near the upper surface of the lower press member 13. The motor 5 with a reduction gear includes an electric motor such as a motor whose rotation direction and rotation speed can be controlled, and a reduction gear that reduces the rotation speed of a drive shaft of the electric motor at a predetermined ratio.

Fixed bearing 3b for the rotating shaft of the lower roller 3
And the external output shaft of the speed reducer are connected via a coupling 6, and a motor 5 with a reduction gear
Is transmitted to the lower roller 3.

The upper roller 2 is made of a material that does not easily deform, such as steel, and has a rotation axis disposed immediately above the lower roller 3 while keeping the rotation axis of the lower roller 3 parallel. Both ends of the rotating shaft of the upper roller 2 are supported by a movable bearing 2a and a fixed bearing 2b in the left and right order from the front.

The fixed bearing 2b is fixed to the lower press member 13 by the fixing jig 10 made of various metal fittings.
The upper roller 2 is rotatably and detachably supported at one end of a rotating shaft of the upper roller 2.

The movable bearing 2a pivotally supports the other end of the upper roller 2 in the longitudinal direction so as to be rotatable and cannot be detached. It is supported so that it can move linearly in the direction. The guide rail 4 is a roller that supports the upper roller 2 so as to be able to move linearly. The guide rail 4 faces the length direction of the upper roller 2, and the lower press of the upper press member 12 is performed by two sets of fixing jigs 10 made of various metal fittings. It is detachably fixed to a surface facing the member 13.

That is, the movable bearing 2a that rotatably and undetachably supports the other end of the upper roller 2 is provided on the guide rail 4
The upper roller 2 is linearly movable on the guide rail 4 integrally with the upper roller 2 in the longitudinal direction of the upper roller 2. Since the guide rail 4 is detachable from the upper press member 12, the upper roller 2 and the movable bearing 2a also
It can be attached to and detached from the upper press member 12 integrally with the guide rail 4.

Next, a specific example of forming a steel sheet using the roll bender 1 according to the present embodiment will be described. FIG. 2 is a perspective view showing a state in which a steel plate is formed by a roll bender according to the first embodiment of the present invention. FIG. 3 is a view following FIG. 2 in which a steel plate is formed by a roll bender according to the first embodiment of the present invention. FIG. 4 is a perspective view showing the state, and FIG.
FIG. 5 is a perspective view showing a state in which a steel sheet is formed by a roll bender according to the first embodiment of the present invention, and FIG. 5 is a state in which a steel sheet is formed by a roll bender according to the first embodiment of the present invention following FIG. FIG. 6 is a perspective view showing a state in which a steel plate is formed by a roll bender according to the first embodiment of the present invention following FIG.

In order to perform roll bending of a steel plate by the roll bender 1 having the above configuration, first, as shown in FIG. 2, the upper roller 2 comes into contact with the lower roller 3 and the lower roller 3 is brought into a predetermined depth. The upper press member 12 of the press brake 11 is lowered until it is pressed and deformed, and the lower roller 3 is rotated by the motor 5 with a reduction gear at a predetermined rotation speed so as to rotate counterclockwise as viewed from the left side. The steel plate 21 to be bent is fed to the lower roller 3 using the feed guide 7 as a guide.

The steel plate 21 that has reached the lower roller 3 is drawn between the lower roller 3 and the upper roller 2 from the front, and
As shown in FIG. 3, it is pushed backward from between the lower roller 3 and the upper roller 2. The portion of the steel plate 21 extruded backward from between the lower roller 3 and the upper roller 2 is already bent into a curved shape.

Eventually, when all the portions of the steel plate 21 are pushed backward from between the lower roller 3 and the upper roller 2,
As shown in FIG. 4, all portions of the steel plate 21 are bent into a curved surface at a constant curvature, and the entire shape of the steel plate 21 is a roll. At this time, the steel plate 21 is attached to the upper roller 2.
The upper roller 2 is inserted through the center of the roll when it is formed into a roll. Further, a part of the steel plate 21 is in a state of being sandwiched between the lower roller 3 and the upper roller 2.

Then, as shown in FIG. 5, when the upper press member 12 of the press brake 11 is pulled upward, the upper roller 2 moves upward, and the steel sheet 21 formed by roll bending is brought into contact with the lower roller 3. It is released from the state of being pinched with the upper roller 2.

Subsequently, as shown in FIG. 6, when the movable bearing 2a is moved leftward from the front with the guide rail 4 as a guide, the upper roller 2 moves leftward integrally with the movable bearing 2a. The part of the end of the rotating shaft of the upper roller 2 which is supported by the fixed bearing 2b is released from the state of being supported by the fixed bearing 2b. In this state, the steel plate 21 formed by roll bending can be separated from the upper roller 2.

In particular, in order to release the steel plate 21 from the state of being sandwiched between the lower roller 3 and the upper roller 2, it is only necessary to pull the upper press member 12 of the press brake 11 upward, and to lift the upper press member 12 upward. This operation is very easy because the operation of pulling up can be performed by operating a switch such as a push button or turning a handle. Similarly, upper roller 2
In order to open one end of the rotary shaft, only the movable bearing 2a is slid along the guide rail 4, and as in the case of a conventional roll bender having three rollers, a heavy feed of several tens of kilograms is required. Since it is not necessary to support the roller manually and separate it from the bearing, it is very easy to separate the steel plate 21 formed by roll bending from the device.

Incidentally, the steel plate 21 formed by roll bending is used.
The magnitude of the curvature of the curved surface of
Can be changed depending on the depth at which the sheet is pressed and deformed. FIG. 7 is an enlarged sectional view showing a state where the steel plate is formed into a roll by the roll bender according to the first embodiment of the present invention.

The lower roller 3 is made of a material having a predetermined elasticity such as urethane, whereas the upper roller 2 is made of a material such as steel which does not easily deform.
Is further lowered even after contact with the lower roller 3,
The lower roller 3 is pressed by the upper roller 2 and deforms according to the shape of the contact surface with the upper roller 2 as shown in FIG. The steel plate 21 is formed into a curved surface in order to pinch and move the steel plate 21 between a contact portion of the upper roller 2 with the lower roller 3 and a pressed portion of the lower roller 3 deformed by the upper roller 2.

That is, in a state where the steel plate 21 is sandwiched between the upper roller 2 and the lower roller 3, the lower roller 3
When the steel plate 21 rotates counterclockwise as shown by c, the steel plate 21 is caught by the lower roller 3 and moves, and the upper roller 2 rotates clockwise as shown by the arrow 2c following the movement of the steel plate 21. At this time, the portion of the steel plate 21 sandwiched between the upper roller 2 and the lower roller 3 is formed into a curved surface under substantially constant conditions according to the shapes of the upper roller 2 and the lower roller 3. The portion passing between the lower rollers 3 has a smooth curved surface connected at a constant curvature. Moreover, the steel plate 2 passing between the upper roller 2 and the lower roller 3
No. 1 does not have a flat portion even in the vicinity of both ends before and after passage, and has a curved surface that is smoothly connected with a constant curvature in all regions.

To change the curvature, the upper roller 2
The depth at which the lower roller 3 presses and deforms the lower roller 3 may be changed. For example, as shown in FIG. 7, in the case indicated by the two-dot chain line rather than the case indicated by the solid line, the upper roller 2 is lowered downward in the direction of the arrow 2 d and the upper roller 2 presses and deforms the lower roller 3. Is getting deeper. Since the range of deformation of the lower roller 3 due to the pressing of the upper roller 2 becomes wider, the curvature of the curved surface of the formed steel plate 21 becomes larger in the case of the two-dot chain line than in the case of the solid line. ing.

That is, the curvature of the curved surface of the steel plate 21 after the roll bending of the steel plate 21 can be changed depending on the depth at which the upper roller 2 presses and deforms the lower roller 3, and the upper roller 2 presses and deforms the lower roller 3. As the depth of the steel sheet 21 increases, the curvature of the curved surface of the steel sheet 21 after the roll bending of the steel sheet 21 also increases.

As described above, the roll bender 1 of the present embodiment comprises the press brake 1 for bending and forming the steel plate 21 by the crushing operation between the upper press member 12 and the lower press member 13.
A lower roller 3 which is a roll bender attached to 1 and is made of a material having a predetermined elasticity such as urethane and which can be attached to and detached from the lower press member 13 while keeping a rotation axis substantially horizontal;
It is made of a material that does not easily deform, such as steel, and can be attached to and detached from the upper press member 12 so that the rotation axis is parallel to the rotation axis of the lower roller 3 and faces the lower roller 3. And an electric motor capable of rotating the lower roller 3 in both forward and reverse directions, the upper roller 2 being rotatable about a rotary shaft, and having a predetermined ratio of the number of rotations of the drive shaft of the electric motor. A motor with a reduction gear, which is a power means having a speed reducer, a coupling 6, which is a power transmission means for transmitting rotation of an external output shaft of the speed reducer to the lower roller 3, A fixed bearing 2b detachably attached to the upper press member 12 rotatably and detachably supporting one end in a longitudinal direction, and a pivotable and non-detachable other end in the longitudinal direction of the upper roller 2. Movable A receiving rail 2a, a guide rail 4 detachably mounted on the upper press member 12 that supports the movable bearing 2a so as to be linearly movable in the longitudinal direction of the upper roller 2, and a steel plate 21 by the lower roller 3 and the upper roller 2; And a feed guide 7 serving as a guide for feeding a predetermined locus into the space between the two.

Therefore, by mounting the roll bender 1 of this embodiment on the press brake 11, the space occupied by the press brake 11 previously installed in the factory can be used as the installation space of the roll bender 1 as it is. Therefore, the work space can be used effectively. Also, by sandwiching the steel plate 21 between the lower roller 3 and the upper roller 2 with a predetermined pressing force, the lower roller 3 is made of a material having a predetermined elasticity such as urethane, so that the outer peripheral curved surface is formed by the outer peripheral surface of the upper roller 2. Deform along the curved surface,
Accordingly, the steel plate 21 is curved in accordance with the shape of the deformed outer peripheral surface of the lower roller 3, and the lower roller 3 is rotated by the motor 5 with a reduction gear as a power unit. After the roll bending, the upper roller 2 is inserted and supported, and then the movable bearing 2a is moved by the guide rail 4 as a guide in a direction away from the fixed bearing 2b.
The upper roller 2 moves integrally with the movable bearing 2a and
b, and the steel plate 21 formed by roll bending can be separated from the upper roller 2, so that the relatively small-scale steel plate 21 can be easily roll-formed compared to a conventional roll bender having three rollers. As a result, the labor involved in separating the roll-bent formed steel sheet 21 from the upper roller 2 is greatly reduced. That is, when the movable bearing 2a is moved in a direction away from the fixed bearing 2b by the guide rail 4 as a guide, the upper roller 2 moves integrally with the movable bearing 2a and separates from the fixed bearing 2b to form an end opening means. Roller 2 of rolled and bent steel plate 21
Can be easily separated.

In addition, the roll-shaped bending of the steel plate 21 starts at the same time as the steel plate 21 to be formed starts being inserted between the lower roller 3 and the upper roller 2, and the lower roller 3 and the upper roller 2 are formed. This is performed until the steel sheet 21 is released from the gap, and there is no flat part left on the formed steel sheet 21 and it is almost complete roll processing that connects smoothly with a constant curvature in all areas, greatly reducing the number of work steps it can. As a result, the manufacturing cost of the roll forming of the relatively small-scale steel plate 21 can be significantly reduced. Further, in order to change the curvature of the curved surface of the steel plate 21 formed by roll bending, the upper roller 2 presses the lower roller 3 by changing the distance between the upper press member 12 and the lower press member 13 of the press brake 11. Since the deformation is performed by changing the degree of deformation, it is easy to roll form the steel plate 21 into a cylindrical shape having an arbitrary diameter within a predetermined range.

The motor 5 with a reduction gear can rotate the lower roller 3 in both forward and reverse directions. The steel plate 21 is interposed between the lower roller 3 and the upper roller 2 in a pressed state. By adjusting the curvature of the curved surface of the steel plate 21 before and after the reciprocation, the lower roller 3 can be rotated back and forth in one direction as compared with the case where the rotation direction of the lower roller 3 is only one direction. Adjustment time for roll bending forming conditions can be shortened.

Further, the rotational speed of the electric motor is reduced at a predetermined ratio by the speed reducer, so that the coupling 6 serving as the power transmission means is rotated.
Is transmitted to the lower roller 3, and the rotation of the lower roller 3 becomes the optimum rotation speed for the roll forming operation of the steel plate 21, so that the workability of the roll forming operation of the steel plate 21 is good. Also,
Since the torque for rotating the lower roller 3 is increased by reducing the rotation speed of the electric motor by the reduction gear,
And a torque sufficient for the roll bending forming process can be obtained.

The power transmitting means is the coupling 6, and the power transmitting means is a gear-shaped gear, bevel gear, chain,
Steel plate 2 compared to the case of other things such as a shaft
Since the power transmission means is durable against the load received during the roll forming operation, the number of component replacements is reduced, and the time loss associated with component replacement is reduced. Further, separation and connection of the motor 5 with the reduction gear and the lower roller 3 are both easy,
Since the motor 5 with the reduction gear and the lower roller 3 can be detached and attached to the press brake 11 in a state where they are separated from each other, the labor involved in attaching and detaching the entire apparatus to and from the press brake 11 is reduced, and workability is improved.

In addition, since the steel sheet 21 to be roll-formed can be fed to the forming position between the lower roller 3 and the upper roller 2 by the feed guide 7 along a locus optimal for roll bending, higher accuracy is achieved. Roll forming can be performed.

In the above description, the coupling 6 is used as the power transmission means for transmitting the rotational force of the motor 5 with the reduction gear to the lower roller 3. However, the present invention is not limited to the coupling 6, but is not limited thereto. Gears, bevel gears, chains, shafts and the like.

In the above description, the power means is a motor 5 with a reduction gear in which a reduction gear and a motor are integrated. However, it is not always necessary to use the motor 5 with a reduction gear. You can combine things. Even when a separate reduction gear and a motor are combined, the lower roller 3 is driven by outputting the torque of the motor via the reduction gear.
The rotation speed of the steel can be made easy to handle and the steel plate 2
A torque sufficient for the roll bending of the first roller 3 can be given to the lower roller 3.

FIG. 8 is a perspective view showing a roll bender according to a second embodiment of the present invention. In the figure, the same reference numerals and symbols as those in the first embodiment denote the same or corresponding parts as in the first embodiment.

The roll bender 31 shown in FIG. 8 is different from the roll bender 1 of the first embodiment in that the coupling 6 of the power means is replaced by a gear-like gear, and the motor 5 with a reduction gear in which the reduction gear and the motor are integrated. Each with a single motor 3
2 and the speed reducer 33.

On the front side of the lower press member 13, a fixing member 34 formed by bending a part of a substantially rectangular steel plate into a substantially L-shape is formed by a bolt 34a while keeping the plane part substantially horizontal. Fixed. On the flat part of the fixing bracket 34, the motor 32 and the speed reducer 33 are arranged such that the output shaft of the motor 32 and the input shaft of the speed reducer 33 are parallel to each other.
The external output shaft of the speed reducer 33 and the rotation axis of the lower roller 3 are arranged so as to be parallel to each other.

The drive shaft of the motor 32 and the input shaft of the speed reducer 33 are provided with pulleys 32a and 33a, respectively, and these two pulleys are connected by a single loop belt 35. Further, a gear-shaped gear 33b and a gear 33c are respectively provided on the external output shaft of the speed reducer 33 and a portion of the rotation shaft of the lower roller 3 protruding from the fixed bearing 3b, and these gears 33b and 33c mesh with each other. ing. The rotation of the drive shaft of the motor 32 is transmitted to the reduction gear 33 via the pulley 32a, the belt 35, and the pulley 33a in this order, and further transmitted to the lower roller 3 via the gears 33b and 33c.

As described above, also in the roll bender 31 of the present embodiment, in that the rotation speed of the motor 32 is reduced via the speed reducer 33 to apply a rotational force to the lower roller 3,
This is the same as the case of the roll bender 1 of the first embodiment. Further, a portion composed of the motor 32 and the speed reducer 33 is assembled to a fixing bracket 34 and integrally formed with the lower gear 3, and is substantially the same as the motor 5 with a reduction gear. Since it is detachable, the roll bender 31 of this embodiment can be considered to have substantially the same configuration as that of the roll bender 1 of the first embodiment. Further, the configuration other than the power means and the power transmission means is the same as that of the roll bender 1 of the first embodiment.

Therefore, in the roll bender 31 of the present embodiment, the roll bender 1 of the first embodiment is also used.
It has substantially the same operation and effect.

[0069]

As described above, the roll bender according to the first aspect of the present invention is mounted on the press brake, so that the space occupied by the press brake previously installed in the factory is directly used as the roll bender installation space. Work space can be used effectively. Further, when the steel plate is sandwiched between the lower roller and the upper roller with a predetermined pressing force, the lower roller is formed of a material having a predetermined elasticity such as urethane, so that the outer peripheral curved surface is deformed along the outer peripheral curved surface of the upper roller, Along with this, the steel plate is curved according to the shape of the deformed outer peripheral surface of the lower roller,
When the lower roller is rotated by the power means as it is, the whole steel sheet is bent and formed into a roll shape, and after the roll bending, the upper roller is inserted and supported,
Then, when one of the longitudinal ends of the upper roller is opened from the bearing by the end opening means, the steel sheet formed by roll bending can be separated from the upper roller,
Roll forming of a relatively small-scale steel plate can be performed more easily than a conventional roll bender having three rollers. In addition to this, the roll-shaped bending of the steel sheet starts at the same time that the steel sheet to be formed starts to be interposed between the lower roller and the upper roller, and is performed until the interposed state is released,
Since a flat plate portion does not remain in the formed steel sheet and almost complete roll processing is performed in all regions, the number of working steps can be significantly reduced. As a result, the manufacturing cost of roll forming a relatively small-scale steel plate can be significantly reduced. Further, the curvature of the curved surface of the steel sheet formed by roll bending is performed by changing the distance between the upper press member and the lower press member of the press brake to change the degree of the upper roller pressing and deforming the lower roller. Therefore, it is easy to roll form a steel sheet into a cylindrical shape having an arbitrary diameter within a predetermined range.

The roll bender according to the second aspect of the present invention has the effect of the roll bender of the first aspect, and can reciprocate back and forth by pressing a steel plate between the lower roller and the upper roller in a pressed state. Therefore, by adjusting the curvature of the curved surface before and after reciprocation of the steel sheet, it is possible to reduce the time required for adjusting the target steel sheet to the roll bending forming condition as compared with the case where the rotation direction of the lower roller is only one direction.

According to a third aspect of the present invention, in addition to the effect of the first or second aspect of the present invention, the number of rotations of the electric motor is reduced at a predetermined ratio by the speed reducer, and the power transmission means is used. Since the rotation is transmitted to the lower roller and the rotation of the lower roller becomes an optimum rotation speed for the roll forming operation of the steel plate, the workability of the roll forming operation of the steel plate is good.

According to the roll bender of the fourth aspect, in addition to the effect of the roll bender of the third aspect, the power transmitting means is a coupling, and the power transmitting means is a gear-shaped gear, bevel gear, chain, shaft or the like. Since the power transmission means is more durable with respect to the load received during the roll forming operation of the steel sheet than in the other cases, the number of component replacements is reduced, and the time loss associated with the component replacement is reduced. Also, the separation and connection of the power means and the lower roller are both easy,
Since the power means and the lower roller can be detached and attached to the press brake in a state where they are separated from each other, the labor involved in attaching and detaching the entire apparatus to and from the press brake is reduced, and workability is improved.

According to the roll bender of the fifth aspect, in addition to the effect of the roll bender of the third aspect, the power means and the lower roller can be separated and connected to each other. Since the lower roller and the lower roller can be attached and detached separately, the labor involved in attaching and detaching the entire device to and from the press brake is reduced, and workability is improved.

According to the roll bender of the invention of claim 6, in addition to the effect of the roll bender of any one of claims 1 to 5, when the movable bearing is moved in the direction away from the fixed bearing by the guide rail as a guide. The upper roller moves integrally with the movable bearing, separates from the fixed bearing, and can release the roll-formed steel plate from the upper roller. The labor involved in removing the formed steel sheet from the upper roller is greatly reduced.

According to a seventh aspect of the present invention, in addition to the effect of any one of the first to sixth aspects of the present invention, a roll bender is provided for rolling a steel sheet to be roll-formed on an optimal locus for roll bending. The roller can be fed to the forming position between the upper roller and the upper roller, so that more accurate roll forming can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a roll bender according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a steel plate is formed by a roll bender according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a state in which a steel plate is formed by a roll bender according to the first embodiment of the present invention, following FIG. 2;

FIG. 4 is a perspective view showing a state in which a steel plate is formed by a roll bender according to the first embodiment of the present invention, following FIG. 3;

FIG. 5 is a perspective view showing a state where the steel plate is formed by the roll bender according to the first embodiment of the present invention, following FIG. 4;

FIG. 6 is a perspective view showing a state where the steel plate is formed by the roll bender according to the first embodiment of the present invention, following FIG. 5;

FIG. 7 is an enlarged cross-sectional view showing a state where a steel plate is formed into a roll by a roll bender according to the first embodiment of the present invention.

FIG. 8 is a perspective view showing a roll bender according to a second embodiment of the present invention.

FIG. 9 is an enlarged cross-sectional view showing a state where a steel plate is formed into a roll by a roll bender having three rollers.

FIG. 10 is an enlarged cross-sectional view showing a state in which the steel plate is formed into a roll shape by a roll bender having three rollers following FIG. 9;

[Explanation of symbols]

 1, 31 Roll bender 2 Upper roller 2a Movable bearing 2b Fixed bearing 3 Lower roller 3a Fixed bearing 3b Fixed bearing 4 Guide rail 5 Motor with reduction gear 6 Coupling 7 Feed guide 11 Press brake 12 Upper press member 13 Lower press member 21 Steel plate 32 Motor 33 Reduction gear 33b, 33c Gear 35 Belt

Claims (7)

[Claims] 1. A roll bender mounted on a press brake for bending and forming a steel plate by a crushing operation between an upper press member and a lower press member, comprising a material having predetermined elasticity such as urethane and having a rotating shaft. A lower roller detachably assembled to the lower press member while being kept substantially horizontal, and made of a material that is not easily deformed, such as steel, and a rotation axis of the lower roller is opposed to the lower roller while being parallel to the rotation axis of the lower roller. It is detachably assembled to the upper press member so that
An upper roller that rotates about a rotation axis when mounted on the upper press member, a power unit that rotates the lower roller, and an end that can open one of both longitudinal ends of the upper roller from a bearing. A roll bender comprising opening means. 2. The roll bender according to claim 1, wherein the power unit is capable of rotating the lower roller in both forward and reverse rotations. 3. The power means includes: an electric motor; a speed reducer for reducing the rotation speed of a drive shaft of the electric motor at a predetermined ratio; and a power transmission means for transmitting rotation of an external output shaft of the speed reducer to a lower roller. 2. The method according to claim 1, further comprising:
Alternatively, the roll bender according to claim 2. 4. The roll bender according to claim 3, wherein said power transmission means is a coupling. 5. The roll bender according to claim 3, wherein said power transmission means is a plurality of meshing gears. 6. A fixed bearing removably mounted on the upper press member for rotatably and removably supporting one end of the upper roller in a longitudinal direction, the end opening means, and a length of the upper roller. A movable bearing that rotatably and irremovably supports the other end of the upper roller, and a guide rail that is detachable from the upper press member that supports the movable bearing so as to be linearly movable in the length direction of the upper roller. 6. The method according to claim 1, wherein
The roll vendor according to any one of the above. 7. The roll bender according to claim 1, further comprising a feed guide for feeding a steel sheet between the lower roller and the upper roller.