JPH0243525Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a roll bridle for a back tension generator for winding a strip coil.

(Prior Art and Problems to be Solved) Conventional back tension generating devices include devices called tension pats and belt bridles. The tension pad is a pad made of felt or the like that strongly presses down on the strip surface. This is because if hard foreign matter adheres to the felt surface, it will scratch the product surface and cause wear due to friction, making it necessary to replace the part.Furthermore, since it is pressed down and generates tension, the power on the winding side is It has disadvantages such as placing an extra burden on it.

A belt bridle is a device in which an endless belt is pressed against a strip, and the belt moves in close contact with the strip without slipping between the two and while providing resistance to movement, thereby generating back tension. This device also has problems when used as a back-tension generator for winding up a strip that has been run through a slitter and cut into longitudinal strips. Because of the difference in thickness between the center and both ends of the strip, there is a difference in the winding diameter of each strip in the middle and on both ends of the coil on the winding side, which causes a difference in the advancing speed of each strip. This is because as a result, it starts to slip on the belt. This causes belt wear and requires belt replacement.

The present invention aims to solve these problems and provide a new back tension generator.

(Means for Solving Problems by Invention) In the present invention, a plurality of small rolls having minute widths are arranged in parallel so that the strip is in surface contact with the roll surface, and each of the small rolls is is rotatable independently in the direction of strip movement, and one roll sandwiched between the two rolls is made vertically movable by an elevating member, and when this vertically movable roll is in the lowered position, the rolls on both sides The strip is characterized in that the strip, which advances while contacting the upper side, contacts and passes the lower side of the vertically movable roll.

To create back tension, simply bend the strip. That is, when the strip is pulled in a bent state, the strip receives a reaction force from the roll against the pulling force, and this reaction force generates back tension.

To bend the strip, the roll is brought to a position where the strip is to be bent, that is, the strip is in surface contact with the surface of the roll. Additionally, a minimum of two rolls would be required to bend the strip.

The small roll may be any roll that can rotate around the support shaft. An example of this would be something like a bearing.

(Example) Hereinafter, the present invention will be described based on drawings showing examples. FIG. 1 shows a small roll 1 having a minute width using commercially available standard ball bearings, which are fitted in a large number in parallel to a support shaft 2 to form a roll 3 as one piece. The width of the small roll 1 can be selected depending on the width of the bearing used for it. The diameter of the entire roll, the diameter of the bearings used therein, and its width can be selected as appropriate by increasing or decreasing the number of bearings attached. There is a slight gap between the bearings, allowing them to rotate freely without touching each other. Also, if there is a chamfer on the peripheral edge of the outer ring of the bearing, remove it by scraping it. This can prevent foreign matter from accumulating on the chamfer.

Three rolls 3 having such a structure are arranged with the direction in which the strip travels and the roll axis are perpendicular to each other,
The large rolls on both sides are fixed rolls 4, and both ends of a roll support shaft 2 are fixed to a support stand 6 with screws 5 and nuts 7. The large roll in the middle is a movement roll of 8,
This roll support shaft is fixed to the moving table 9 using screws and nuts in the same manner as described above, and the moving table 9 is attached to the roll stand 10 so that it can be moved up and down. The roll position can be adjusted. A screw jack 11 is installed on the upper part of the roll stand 10, and the moving roll 8 is moved up and down by the rotation of the screw. This Screwy Jack 11 is remote controlled,
Can be operated from any position. Note that a hydraulic jack may be used instead of the screw jack.

FIG. 4 is a schematic diagram of the apparatus according to the embodiment of the present invention installed on a slitter line. The strip coil is flattened by a flutter 12 and then cut longitudinally into a number of strips by a slitter 13, and these cut strips are wound into a coil by a roll bridle 14 while generating back tension.

(Operation) The operation of the roll bridle configured as described above is as follows. First of all, Screwjyatsuki 11
The movable roll 8 is moved upward, passes the strip, and then moved downward again to fix the strip at an appropriate position depending on the material, thickness, width, etc. of the strip.

The strip moves without slipping on three rolls and is wound up by the action of ball bearings. At this time, since the strip is bent, it receives a reaction force from the roll against the tension of the winding, and a component of this reaction force in the opposite direction to the tension force generates back tension. moreover,
When winding a strip that has been run through a slitter and cut into a number of strips in the longitudinal direction, it is possible to sufficiently deal with differences in the speed of progress of each strip due to the difference in the winding diameter of each strip. In other words, since the roll of the present invention has a structure in which each small roll can rotate independently, the corresponding small rolls of each strip can rotate independently at a speed that matches the advancing speed of each strip. Since it can be rotated by hand, it can be moved without slipping on the roll.

(Effects) As described above, the device of the present invention can be used for both general lines and slitting lines.
The use of rotating rolls reduces the power on the winding side,
Leads to energy savings. It is wear resistant due to rolling contact, and the load is shared between each small roll, resulting in durability and no need for parts replacement. Furthermore, it is easy to manufacture and inexpensive to manufacture, and it will be even cheaper if commercially available standard bearings are used. It also has various advantages such as being able to be easily added to existing equipment.

[Brief explanation of drawings]

Figure 1 is a roll plan view of an embodiment of the present invention, Figure 2 is a front view of an embodiment of the invention, Figure 3 is an enlarged side view of a roll of an embodiment of the invention, and Figure 4 is a roll view of an embodiment of the invention. A schematic diagram of a device according to an embodiment of the invention attached to a slitting line is shown, respectively.

Claims (1)

[Scope of utility model registration request] A plurality of rolls formed by paralleling a plurality of small rolls having minute widths are arranged so that the strip is in surface contact with the surface of the rolls, and each of the small rolls is rotatable independently in the traveling direction of the strip, One roll sandwiched between two rolls is made vertically movable by an elevating member, and when this vertically movable roll is in the lowered position, the strip, which advances while contacting the upper side of both rolls, moves vertically. A roll bridle that is characterized by being in contact with and passing under the freely movable roll.