JP2014018815A - Side roll stand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side roll stand having a simple and compact configuration and including a mechanism for driving a roll shaft, as a so-called side roll stand for use in a feeding device of a long material, etc., and having a roll shaft disposed vertically to a bed surface.SOLUTION: Worm gears 7a, 7a' unrotatably mounted to a drive shaft 5 are rotated by the rotation of a drive shaft 5, and the rotation of the worm gears 7a, 7a' is transmitted to worm wheels 6, 6' to thereby rotate roll shafts 3, 3'. In this case, the worm gears 7a, 7a' are threaded oppositely to each other at both sides with respect to a line center, so that two rolls (not shown) are rotated by the rotation of the roll shafts 3, 3' rotating in the direction opposite to each other, and thereby an object to be conveyed that is sandwiched between the rolls is conveyed. In accordance with a change in size of the object to be conveyed, the interval between the roll shafts 3, 3' is changed by rotating a threaded bar 4 that are threaded oppositely to each other at both sides with respect to the line center.

Description

  The present invention relates to a side roll stand provided with a mechanism for driving a roll shaft with a simple and compact configuration.

As a roll stand used for a roll forming device, a long material feeding device, etc., as shown in FIG. 1, for example, an upper and lower roll stand in which a pair of roll shafts are arranged horizontally and vertically, FIG. A side roll stand in which a pair of roll axes are arranged in a direction perpendicular to the line traveling direction as shown in FIG. 2, a four-way roll stand that combines two methods, and the like are used.
For example, the conveying device used in the method for manufacturing the H-shaped steel proposed in Patent Document 1 has a plurality of stages of side roll stands.

And in order to give a driving force to material, it is necessary to drive a roll about some of these roll stands. In order to drive the roll, it is common to connect a drive source such as a motor to the roll shaft. As seen in FIGS. 1 and 2, the driving force of the motor is transmitted to the roll of the roll stand via the gear box and the universal joint.
In the upper and lower roll stands, the method of driving the lower shaft with the fixed shaft height is the simplest structure. When the upper roll is also driven, the driving force can be transmitted from the driven lower shaft to the upper shaft through a gear or a chain.

When driving an upper and lower roll stand whose height of the lower shaft can be changed, an appropriate distance is provided between the driving source and the shaft end, and a driving force can be transmitted by connecting the distance with a universal joint.
On the other hand, as shown in FIG. 2, when driving the side roll stand, since the distance between the two axes is generally a structure that can be expanded and contracted, it is necessary to connect the lower end of the roll axis and the drive source with a universal joint. The drive source needs to be placed under the bed. Furthermore, if the bed height is limited, the floor must be dug down.

By the way, the present inventors arrange one web material perpendicularly to the flange between two flange materials arranged in parallel, and press the two flanges while pressing them from the outside of the two flanges. And a method of manufacturing a welded steel that is welded by irradiating a butt portion of the web with laser light (see Patent Document 2).
In such a welded steel manufacturing method, from the viewpoint of facilitating the welding operation, an assembly in which one web member is arranged perpendicularly to the flange between two flange members is used as a web member. It is desirable that the two flange members are transported horizontally and sandwiched between side rolls.

JP-A-2-169179 JP 2009-119485 A

However, when a drive-type side roll stand using a universal joint as shown in FIG. 2 is used as the transport mechanism in the welded steel manufacturing method proposed in Patent Document 2, various problems are encountered. Come up.
That is, in order to secure the length of the universal joint, it is necessary to dig up the floor surface or make the bed higher than necessary, which raises problems in terms of installation work cost or workability. Further, since the drive mechanism is installed through a hole opened in the bed, not only is the work of removing the stand very complicated, but there are many restrictions on the arrangement of the stand.

Furthermore, in a device that uses a large amount of coolant for lubrication and cooling, such as a roll forming device, a drive source such as a motor installed at the lower part of the main body device may be wetted by the leaked coolant.
Furthermore, even when the vertical roll stand of FIG. 1 type and the side roll stand of FIG. 2 type are installed side by side in the line traveling direction, the installation position of these drive sources is the same for the vertical roll stand. Since it is the bed upper surface and the side roll stand is the bed lower surface and the drive source is separated, it is difficult to share the drive source between both types of roll stands.

  The present invention has been devised in order to solve such problems, and is used in a long material feeding device or the like, in which a roll axis is arranged perpendicular to a bed surface, a so-called side. An object of the present invention is to provide a side roll stand provided with a mechanism for driving a roll shaft with a simple and compact configuration as a roll stand.

  In order to achieve the object of the side roll stand of the present invention, a pair of roll shafts rotatably attached to two roll chocks are arranged in a direction perpendicular to the line traveling direction, and the two roll chocks are arranged in a line center. The side roll stand is structured to be expanded and contracted by a roll expanding / contracting screw rod having opposite threads on both sides thereof, and a worm wheel is mounted at a place other than the roll mounting portion of the roll shaft, and the worm wheel And a worm gear having two gear portions threaded in opposite directions on both sides with respect to the line center, and parallel to the roll expansion / contraction screw rod and in the housing of the stand The drive shaft is supported so that it can rotate and cannot move axially. Characterized in that attached to the ability.

The worm gear is attached to the drive shaft so that it cannot rotate and can only move in the axial direction. Further, the movement of the worm gear in the axial direction is regulated by each roll chock, and the worm gear is interlocked in the axial direction following the movement of the roll chock. It is preferable to arrange | position.
The worm gear may be attached to the drive shaft so that it cannot rotate and cannot move in the axial direction, and the worm wheel may be arranged to move while rolling on the worm gear as the roll chock moves.

The side roll stand provided by the present invention is more compact than the universal joint type because the driving force transmission mechanism is accommodated in the stand housing. In addition, since the drive shaft protrudes from the side of the housing, the drive source can be installed on the upper surface of the bed, so that the drive source can be shared with the transport device using the upper and lower roll stands together. Moreover, since the drive motor can be directly attached to the stand housing, it can be arranged at an arbitrary position on the bed surface.
The side roll stand provided by the present invention is arranged in such a manner that one web material is arranged perpendicularly to the flange between two flange materials arranged in parallel and pressed by a roll from the outside of the two flanges. When manufacturing welded shape steel that is welded by irradiating laser beam to the flange and web butt, it is possible to transport the shape steel with the web placed horizontally when used for transporting the raw material assembly. Therefore, not only is the laser light irradiation direction downward, which is preferable for safety, but also the laser light emission head has an opening downward, which prevents contamination of engineering components such as lenses that focus the laser light. it can.
In addition, since the side roll stand according to the present invention has few restrictions on the arrangement of the conveying device or the welded shape steel manufacturing device, the laser welded shape steel can be manufactured using a cut plate as a raw material by arranging a plurality of units at small intervals. In this case, it is possible to manufacture a product having a short length.

Diagram explaining conventional drive mechanism (upper / lower roll stand / horizontal axis stand) The figure explaining the conventional drive mechanism (side roll stand / vertical axis stand) The figure explaining the drive mechanism of this invention (the 1) The figure explaining the drive mechanism of this invention (the 2) Diagram explaining the roll chock expansion / contraction mechanism

1: Housing 2, 2 ': Roll chock
3, 3 ': Roll shaft (with key / not shown) 4: Screw rod for roll expansion / contraction
5: Drive shaft 5a: Keyway
6, 6 ': Worm wheels 7a, 7a': Worm gear (slidable in the drive shaft direction)
7b, 7b ': Worm gear (cannot slide in the drive axis direction)
8: Bearing 8a: Bearing 8b: Bearing case 8c: Collar
9: Driven geared motor 10: Drive shaft support

As described above, in the drive-type side roll stand using a universal joint, it is necessary to dig up the floor surface or to make the bed higher than necessary in order to secure the length of the universal joint. There will be more problems in terms of Further, since the drive mechanism is installed through a hole opened in the bed, not only is the work of removing the stand very complicated, but there are many restrictions on the arrangement of the stand. Furthermore, various problems occur as the drive mechanism is disposed below the main device.
In view of this, the present invention has been achieved by arranging the drive mechanism on the side of the side roll stand and incorporating a mechanism for transmitting the drive force in a worm gear-worm wheel system without using a universal joint.

The details will be described below with reference to the drawings.
First, an embodiment of the present invention will be described with reference to FIG.
Roll chocks 2 and 2 'are arranged in the housing 1, and a pair of roll shafts 3 and 3' are rotatably attached to the roll chocks 2 and 2 '. In addition, a pair of roll axis | shafts 3 and 3 'are arrange | positioned in the direction orthogonal to a line advancing direction. The two roll chocks 2 and 2 'have a structure that is expanded and contracted by a roll expanding / contracting screw rod 4 in which screws in opposite directions are cut on both sides with respect to the line center.

Also, worm wheels 6 and 6 'are attached to places other than the roll attachment portion of the roll shafts 3 and 3', and worm gears 7a and 7a 'engaged with the worm wheels 6 and 6' are provided. The worm gears 7a and 7a 'are arranged in parallel with the roll expansion / contraction screw rod 4 and are attached to the drive shaft 5 which is rotatably attached to the housing 1 of the stand and not movable in the axial direction of the drive shaft. And is supported by a support portion so as to be non-rotatable with respect to the drive shaft 5 and slidable in the axial direction, and is movable in the axial direction in conjunction with the roll chocks 2 and 2 ′. The worm gears 7a and 7a 'attached to the drive shaft 5 are threaded in opposite directions on both sides with respect to the line center. In this case, gear teeth in opposite directions corresponding to the worm gears 7a and 7a 'are cut on the worm wheels 6 and 6' engaged with the worm gears 7a and 7a '.
The drive shaft 5 is arranged to be driven by the geared motor 9.

  In the side roll stand shown in FIG. 3, the driving force of the geared motor 9 is transmitted to the drive shaft 5, and the worm gears 7 a and 7 a ′ that are non-rotatably attached to the drive shaft 5 as the drive shaft 5 rotates. Is rotated. Then, the rotation of the worm gears 7a and 7a 'is transmitted to the worm wheels 6 and 6', and the roll shafts 3 and 3 'are rotated. At this time, since the worm gears 7a and 7a 'are threaded in opposite directions on both sides with respect to the line center, the directions of rotation transmitted to the worm wheels 6 and 6' are opposite to each other. Due to the rotation of the worm wheels 6 and 6 ′, that is, the rotation of the roll shafts 3 and 3 ′, the two rolls (not shown) are rotated in opposite directions, and the object to be conveyed sandwiched between the rolls is conveyed. .

In addition, it is necessary to adjust the space | interval of roll axis | shafts 3 and 3 'with the size change of a to-be-conveyed object. This is performed by rotating the screw rod 4 for use.
That is, as shown in FIG. 5, the roll shaft 3, which is rotatably attached to the roll chock 2, 2 'by expanding or contracting between the roll chock 2, 2' by the rotation of the roll expansion / contraction screw rod 4. The space between 3 'is expanded or contracted, whereby the distance between the two roll axes 3, 3' is adjusted. At this time, the worm wheels 6 and 6 ′ attached to the roll chock 2 and 2 ′ have worm gears 7 a and 7 a ′ attached to the drive shaft 5 so as to be slidable in the axial direction as seen in FIG. While moving, the object moves in a direction perpendicular to the conveyance direction of the object to be conveyed.

  The bearing 8 can be applied with a radial load and a thrust load. The outer ring is held by the bearing case 8a and the inner ring is held by the collar 8b so that the bearing 8 is fixedly attached to the chock 6 and rotatably supports the drive shaft 5 ( Hold. The worm gear 7a is slidably mounted on the drive shaft 5 and is non-rotatably attached to the drive shaft 5 by a key and a key groove 5a. Since both ends of the worm gear 7a are regulated with respect to the roll chock 6 by the collar 8b, the bearing 8, and the bearing case 8a, when the roll chock 6 moves in the width direction by the roll expansion / contraction screw rod 4, the drive shaft 5 Move along with the roll chock 6 while sliding on top.

Incidentally, in the embodiment shown in FIG. 3, the worm gears 7a and 7a ′ are not rotatable on the drive shaft 5 attached to the housing 1 of the stand so as to be rotatable and not movable in the axial direction. Although slidably attached, the worm gears 7b and 7b 'may be attached to the drive shaft 5 so as not to rotate and to move in the axial direction.
In this case, as shown in FIG. 4, as the roll chock 2 moves, the worm wheels 6, 6b ′ move while rolling on the worm gears 7b, 7b ′. The worm gears 7b and 7b ′ are required to have a length that enables normal meshing regardless of the position of the worm wheel. In FIG. 4, reference numeral 10 denotes a support portion for the drive shaft 5 fixed to the housing 1.

Claims (3)

  A roll in which a pair of roll shafts rotatably attached to two roll chocks are arranged in a direction orthogonal to the line traveling direction, and two roll chocks are threaded in opposite directions on both sides with respect to the line center A side roll stand having a structure that is expanded and contracted by an expansion / contraction screw rod, a worm wheel is attached to a location other than a roll mounting portion of a roll shaft, and a worm gear meshed with the worm wheel is provided, and the worm gear is installed at a line center. A drive shaft having two gear portions cut in opposite directions on both sides and parallel to the roll expansion / contraction screw rod and supported by the stand housing so as to be rotatable and non-movable in the axial direction. A side roll stand that is mounted so as not to rotate.   The worm gear is attached to the drive shaft so that it cannot rotate and can only move in the axial direction. Further, the movement of the worm gear in the axial direction is regulated by each roll chock, and the worm gear is interlocked in the axial direction following the movement of the roll chock. The side roll stand of Claim 1 arrange | positioned.   The worm gear is attached to the drive shaft so as not to rotate and cannot move in the axial direction, and is arranged so that the worm hole is interlocked in the axial direction while rolling on the worm gear following the movement of the roll chock. Side roll stand.

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