JP2005256874A - Belt training idler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt training idler used for a guide roller or the like for a linerboard, a strip-shaped sheet material such as a synthetic resin film, a belt, or the like to run in the longitudinal direction, in which structure is simple to be manufactured at low cost, and in which meandering of subject material to be run can be securely prevented. <P>SOLUTION: A support shaft 5 is inserted on the inner side of a roller main body 4 in a cylindrical form, and the roller main body is supported by a self-aligning bearing 6 fixed to a middle part of the support shaft to be capable of inclining. A circular elastic body 8 is provided close to each end part of the support shaft to support each end part of the roller main body from the inner surface. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a self-aligning roller that can be used for a guide roller or the like that travels a belt-like sheet material such as corrugated cardboard or the like in the longitudinal direction, and prevents meandering thereof.

  For example, with respect to a guide roller provided for winding a corrugated cardboard on the surface of a heating roller, a meandering correction device has been conventionally provided to prevent meandering due to expansion and contraction of the corrugated cardboard due to heat. Yes.

  Further, the belt aligning device disclosed in the following Patent Document 1 detects the meandering of the belt by a sensor and tilts the guide roller in a required direction by a motor so that the meandering is automatically corrected.

The meandering correction device disclosed in Patent Document 2 below supports both ends of a roller shaft by self-aligning bearings, and accommodates the self-aligning bearings in a case inclined in the belt traveling direction. Is guided by the case and tilted to automatically correct the meandering of the belt.
JP-A-8-022213 JP-A-6-247526

  By the way, the conventional belt aligning device requires a sensor, a control device, a motor and the like, so that there is a problem that the structure is complicated and the cost is increased. Further, the meandering correction device has a problem that it is difficult to react sensitively to the meandering of a belt-like sheet material such as a belt or a corrugated cardboard as a running material.

For this purpose, the self-aligning roller of the present invention has a support shaft inserted through the inside of a cylindrical roller body, and supports the roller body in a tiltable manner by a self-aligning bearing fixed to the middle portion of the support shaft. An annular elastic body for supporting both end portions of the roller body from the inner surface is provided near both end portions of the support shaft.
According to the present invention, in the self-aligning roller, an annular elastic body is rotatably provided with a bearing interposed near both ends of the support shaft.
According to the present invention, in the self-aligning roller, the annular elastic body is formed by forming a large number of through holes in an annular body made of urethane rubber.

  Since the structure is simple, it can be manufactured at a low cost, and it can react sensitively to the uneven distribution of the tension of the running material and reliably prevent meandering. In addition, by providing an annular elastic body, the degree of response to the tension of the running material is appropriately adjusted by the elasticity of the annular elastic body, and appropriate settings can be made according to factors such as the material and thickness of the running material It becomes.

  FIG. 1 shows an example in which the self-aligning roller according to the present invention is used as a guide roller for a corrugated paper production facility, wherein 1 is an automatic aligning roller, 2 is a strip-shaped corrugated base paper that is a running material, and 3 is the automatic aligning roller. This is a heating roller in which a corrugated base paper 2 is wound around the surface by a center roller 1.

  A longitudinal sectional view of the self-aligning roller 1 is shown in FIG. In the figure, 4 is a cylindrical roller body, 5 is a support shaft fixed horizontally, and the support shaft is inserted inside the roller body 4. Reference numeral 6 denotes a self-aligning bearing fixed to an intermediate portion of the support shaft, and the roller body 4 is tiltably supported by the self-aligning bearing. The self-aligning bearing 6 is a known self-aligning roller bearing in which the outer peripheral surface of the inner ring 6a and the inner peripheral surface of the outer ring 6b are formed in a spherical shape, and a large number of rollers 6c are provided between the inner and outer peripheral surfaces. .

  As shown in FIG. 3, a radial roller bearing 7 including an inner ring 7 a, an outer ring 7 b, and a roller 7 c is provided near both ends of the support shaft 5, and an annular elastic body 8 is fitted on the outer periphery of the bearing 7. The outer periphery of the annular elastic body is brought into contact with the inner surface of the roller body to support both ends of the roller body from the inner surface. The annular elastic body 8 is formed to be rich in elasticity by making a large number of through holes 8a in an annular body made of urethane rubber.

  In the self-aligning roller 1 configured as described above, since the roller body 4 can tilt around the self-aligning bearing 6, if the tension applied to the corrugated cardboard paper 2 is unevenly distributed in the width direction, the roller body 4 is drawn by the tension. However, as shown by a virtual line in FIG. For this reason, the uneven distribution of the tension of the corrugated cardboard paper is eliminated naturally, meandering is prevented, warpage and wrinkles are prevented, and even deformed paper tubes and base papers with uneven winding can be run without problems. Further, when attached to the pre-heater section, there are various advantages such as uniform contact with uniform base paper at all times and enabling uniform heating.

  Further, since the annular elastic body 8 has a function of returning the roller body 4 when the roller body 4 tilts, the annular elastic body 8 is prevented from reacting excessively to the uneven distribution of the tension of the corrugated cardboard and excessively tilting. This enables more stable running. The elasticity of the annular elastic body 8 can be set as appropriate depending on the material of the urethane rubber, the diameter of the through holes 8a, and the number of holes.

  Further, the elasticity of the annular elastic body 8 can be appropriately set according to factors such as the material and thickness of various running materials such as metal strips and synthetic resin films, running speed, etc. For this reason, the material of the annular elastic body is appropriately selected according to the use from a soft material such as a sponge to a hard material such as a steel spring. Moreover, when using a coil spring, it is also possible to comprise an annular elastic body by arranging a plurality of coil springs radially around the support shaft 5.

  As described above, in the self-aligning roller of the present invention, since the roller body tilts according to the tension of the running material, the uneven distribution of the tension that causes meandering is eliminated, and troubles such as meandering or lateral deviation can be prevented. And since it has a very simple structure and requires a small number of parts, it can be manufactured at low cost, and since the roller body is supported by a single point on the support shaft, it reacts sensitively to external forces and tilts. You can always guide the running material correctly. Further, since both ends of the roller body are supported by the annular elastic body, there is an advantage that traveling performance can be further stabilized.

  The self-aligning roller of the present invention is not limited to the corrugated board manufacturing equipment shown in the embodiments, but can be widely applied as a travel guide roller of a strip-like material such as various films and papers, or a tension roller of a belt conveyor.

The perspective view which showed the use condition of the self-aligning roller which shows the Example of this invention. The longitudinal cross-sectional view of the self-aligning roller which shows the Example of this invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2.

Explanation of symbols

1 Self-aligning roller 2 Running material (corrugated paper)
4 Roller body 5 Support shaft 6 Self-aligning bearing 7 Bearing 8 Annular elastic body

Claims (3)

  A support shaft is inserted inside the cylindrical roller body, and the roller body is tiltably supported by a self-aligning bearing fixed to an intermediate portion of the support shaft, and the rollers are disposed near both ends of the support shaft. A self-aligning roller comprising an annular elastic body that supports both ends of a main body from an inner surface.   The self-aligning roller according to claim 1, wherein an annular elastic body is rotatably provided with bearings interposed between both ends of the support shaft.   The self-aligning roller according to claim 1 or 2, wherein the annular elastic body is formed by forming a large number of through holes in an annular body made of urethane rubber.

Images