JPH028139A - Suction roll - Google Patents

Abstract

PURPOSE:To attract a plate during passage to a roll surface by suction and prevent its vibration from occurring by forming a roll into hollowness and installing a lot of holes or slits on the roll surface. CONSTITUTION:A shaft 6 of a suction roll 1 passes through the center of end faces 4, 4 and fixed tight thereto, serving as a shaft of an axial flow vane 5. In addition, this shaft 6 is connected to a driving system via a bearing. If a metal plate 7 is being conveyed on the suction roll 1, conveying speed of this plate 7 and rotational speed of the suction roll 1 are congruous with each other and, what is more, the axial flow vanes 5, 5 at both end faces 4, 4 are rotated, and air inside the suction roll 1 is exhausted so that air is inhaled from a lot of holes 3 on a roll surface 2 and thereby the plate 7 is always pressed onto this roll surface 2 by dint of tension. Consequently, vibration in the plate 7 is thus preventable.

Description

[Detailed description of the invention] <Industrial use! 〉 The present invention relates to a threading roll in iron-making machinery, a printing machine, a support roll in a paper machine, and a suction roll used in 1.

<Prior art> Conventionally, in the lines of steelmaking 8M machines, printing machines, paper machines, etc., a large number of rolls are used to convey, change direction, and drive metal plates, etc., and these rolls are hollow or It is a solid item,
Rotation is maintained either by providing an external drive system or by using friction from metal plates.

<Problems to be Solved by the Invention> In order to speed up the lines of the above-mentioned steel making machines, printing machines, paper machines, etc., the flow velocity of the air accompanying the metal plates on the line increases, and the flow rate between the rolls and the metal increases. There is a high possibility that an air gap will form between the plates. For example, if a metal plate 22 is passing through the birch shown in FIG. Add. As shown in FIG. 10, as the speed ■ of the plate 22 increases, the plate 22
The flow velocity of the air accompanying the roll 21 also increases, and the flow rate of air that gets caught up in the plate material 22 on the roll 21 increases, creating an air layer gap 25 and exerting pressure on the plate material 22 on the roll 21 away from the roll 21 in the direction of the arrow 24. The plate material 22 is now in a floating state. Then, as shown in FIG. 9, due to the tension, there is a concern that the pressure in the air layer gap 25 will cause vibration in the process of coming into contact with the mouth surface 26 again. This may lead to noise due to vibration and cutting of materials such as broken boards. However, this force is an unavoidable phenomenon when the line speed is increased.

In view of the above problems, an object of the present invention is to provide a roll having a structure that allows the plate material 22 being passed to be attracted to the roll surface 26.

In order to achieve the above object, it is easy to make the roll hollow, provide holes or slits in the roll surface, and create a negative pressure lower than atmospheric pressure inside the roll to suction the plate material. Furthermore, as a method of creating this negative pressure, it is possible to suction gas from inside the roll using a vacuum pump or a blower, but in the present invention, such a supplement is not used and the rotation of the roll is used. In the hollow roll, both end faces of the roll are shaped like impellers to discharge gas to the outside of the roll,
The roll surface is characterized by holes or slits.

Function> The present invention utilizes the fact that the Saxian roll rotates at the same speed as the speed of, for example, a metal plate or paper passing over the roll surface, and uses impellers provided on both end faces of the roll. The gas inside the Saxilon roll is discharged by rotation. Therefore,
Metal plates, paper, etc. can be sucked onto the roll surface through holes or slits on the roll surface, and vibration of the metal plates, paper, etc. can be prevented.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, the structure of the suction roll 1 is hollow and holes 3,3° are provided on the roll surface 2. Axial flow blades 5 are integrally formed on both end surfaces 4, 4 of the suction roll 1, as shown in FIGS. 2 and 3.

The shaft 6 of this suction roll 1 passes through the center of the end WJ4.degree. 4 and is fixed thereto, and serves as the shaft of the axial flow blade 5.

Further, the shaft 6 is connected to a drive system (not shown) via a bearing (not shown). When a metal plate 7, for example, is conveyed on the suction roll 1 on a line (not shown), the conveyance speed of the plate 7 and the rotational speed of the suction roll 1 match, and both ends of the metal plate 7 are conveyed on the suction roll 1. The axial flow vanes 5, 5 on the surfaces 4, 4 rotate to discharge the air inside the suction roll 1 through the holes 3 on the roll surface 2. - More air is taken in and the plate material 7 is constantly pressed onto the roll surface 2 by tension. Therefore, vibration of the plate material 7 can be prevented.

Further, the shape of the blade may be a mixed flow blade 8 shown in FIG.
Furthermore, the suction roll 1 does not need to be connected to a drive system, and may be rotated by the plate material 7. and,
The holes 3 on the roll surface 2 may be slits (not shown).

Further, it is not necessary to provide the axial flow vanes 5 and the like on both end faces of the suction roll 1, and it is sufficient to provide them only on one end face.

FIG. 5 shows another embodiment of the above embodiment.

As shown in Figures 6, 7, and 8, suction roll 1
1 is supported by a shaft 12 via a rib 13. Holes 15 are provided on the roll surface 14 of the suction roll 11.

The ribs 13 are arranged at a pitch that allows a space for air to pass through. At one end of the suction roll 11, the same axial flow vane 5 as in the previous embodiment is mounted on the shaft 12 with a bearing 1.
It is rotatably attached via 6. In principle, to prevent the axial flow blade 5 from rotating, a stopper 17 such as a steel rod is provided independently from the traction roll 11, or a weight (not shown) is attached to one side of the axial flow blade 5. There is.

For example, if a metal plate 18 is being conveyed on a line (not shown), the conveyance speed of the plate 18 and the rotational speed of the Saxian roll 11 are the same, so the suction is The air inside the roll 11 rotates and is discharged by the action of the axial vanes 5 to form the holes 15 on the roll surface 14. ...Since more air is taken in, the air layer gap 25 that occurs due to the high speed rotation of the succilon roll 11 is eliminated. The plate material 18 is always pressed onto the roll surface 14 due to the tension. Therefore, vibration of the plate material 18 can be prevented. This axial flow blade 5
The ends may be provided at both ends of the succilon roll 11. Further, the impeller 5 is not limited to the axial flow impeller 5, and may be a diagonal flow impeller 8. The suction roll 11 may be driven by rotating due to friction with the plate material 18, or by applying a driving force from the outside.

<Effects of the Invention> The present invention utilizes the phenomenon that the air inside the suction roll also rotates when the roll rotates at the same speed as the speed of the metal plate, paper, etc. on a high-speed line, and the end surface of the suction roll is The blades formed in the roll rotate to exhaust the air inside the roll. Since the roll surface has holes (or slits), it is possible to create a flow of air that flows from the roll end surface to the outside of the roll through the holes (or slits) from the outside of the roll. In this case, since the inside of the roll has a negative pressure lower than atmospheric pressure, it becomes possible to suction metal plates, paper, etc. Therefore, the air gap between the roll surface and the metal plate, paper, etc. can be eliminated, and vibration of the metal plate, paper, etc. can be prevented.

[Brief explanation of the drawing]

1 to 8 show two embodiments of the present invention, FIGS. 1 and 5 are perspective views of succilon rolls showing the embodiments, and FIGS. 2 and 7 are perspective views of succilon rolls, respectively. A side view of the roll, Figures 3 and 4 are perspective views showing the shape of the blades, Figure 6 is a perspective view showing the structure of the blades, Figure 8 is a sectional view of the end of the suction roll, and Figures 9 and 4 are perspective views showing the shape of the blades. FIG. 10 is an explanatory diagram showing the behavior of a plate in a conventional roll. In the drawings, 1 and 11 are suction rolls, 2° and 14 are roll surfaces, 3 and 15 are holes, 4 is an end face of the roll, 5 is an axial flow blade, and 8 is a diagonal flow blade. L,, --,,,1 Figure A Figure

Claims (1)

[Claims] A suction roll characterized in that the hollow suction roll has impeller shapes on both end faces of the roll to discharge gas to the outside of the suction roll, and holes or slits are provided on the roll surface.