JPS6037399Y2 - expander roll - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an expander roll used for removing wrinkles from paper, cloth, synthetic resin films, etc.

When using conventional rubber-coated expander rolls under high-temperature conditions, the physical properties of the rubber deteriorate due to heat, so paper,
Roll wear progresses quickly due to frictional contact between the roll surface and the object to be processed, such as cloth or synthetic resin film.

In addition, surface cracks occur due to deterioration of the physical properties of the rubber, which deteriorates performance and adversely affects the quality of the treated object.

Thus, the lifespan of rubber coated expander rolls under high temperature conditions is short, typically several months.

For this reason, for example, in the dryer part of the papermaking process in the paper manufacturing industry, metal expander rolls with a large number of cylindrical steel bobbins attached to the outer periphery of the shaft via bearings are sometimes used. Sealing between bobbins is always a problem.

As shown in FIG. 1, as a sealing structure between bobbins of metal expander rolls, a cylindrical rubber sealing band 8 is attached to the end face of two adjacent metal roll cells (bobbins) 2.
It is known that both ends of the
(See No. 2027).

However, such a conventional seal structure has a complicated structure, is troublesome to assemble, and is expensive, as well as the following problems.

In other words, since the expander roll is used slightly curved, there is a slight gap between the bobbins when the roll is made of metal, but when the roll is made of wet paper or paper with high tension,
This gap tends to cause wrinkles and paper breakage.

Moreover, paper powder and dust are likely to become clogged between the bobbin 2, and if these clog up to the outer periphery of the bobbin 2, the paper becomes dirty and also causes wrinkles and paper breakage.

Furthermore, since the sealing band 8 needs to be deformed during assembly or rotation, it inevitably becomes thinner and deteriorates quickly due to heat, resulting in a short lifespan.

This invention was made in view of the above-mentioned circumstances, and the purpose is to provide an expander roll that has a simple structure, has a long service life, and is free from the risk of wrinkles, damage, and staining of the processed material. do.

This invention will be explained below with reference to drawings showing embodiments.

In FIG. 2, the expander roll includes a large number of cylindrical metal bobbins 12 attached to the shaft 10 via a shaft 10 and bearings 11 with a slight gap between them, and two adjacent bobbins 12. It is provided with an annular rubber seal 13 fitted from the inside so as to straddle the end of the ring.

Stop collars 14 are fitted on both ends of the outer periphery of the shaft 10, and bearing bushes 15 and distance pieces 16 are fitted alternately between these.

A bearing 11 is firmly fitted into the inner periphery of the bobbin 12 at the center in the longitudinal direction, rubber rings 17 are fitted on both sides of the bearing 11, and the bearing 11 is fitted onto the outer periphery of a bush 15. There is.

The outer circumferential surface of the seal 13 is in close contact with the inner circumferential surfaces of the ends of two adjacent bobbins 12, and an annular protrusion is provided on the outer circumference of the seal 13 to fill the gap between the two bobbins 12. 18 are provided.

A bearing 11, a bush 15, and a rubber ring 17 are fitted in advance to the hobbin 12. After fitting a stop collar 14 to one end of the shaft 10, the bearing bush 15 to which the bobbin 12 is attached, the distance piece 16, and By fitting the seals 13 one after another in this order from the other end of the shaft 10, the expander roll can be easily assembled.

Then, the shaft 10 is slightly bent, and the bobbin 12 is attached to the shaft 1.
Rotate around 0.

For the comb seal 13, a suitable material such as nitrile rubber is used.

The metal bobbin 12 is made of a suitable material such as bird chrome plated steel, and the mounting structure of the bobbin 12 to the shaft 10, such as the arrangement of the bearing 11, is not limited to that of the above embodiment.

Further, in the above embodiment, the outer circumferential surface of the seal 13 and the inner circumferential surface of the pobbin 12, which are in contact with each other, are formed to be smooth, but threaded grooves or independent grooves may be formed on each of these surfaces and fitted together.

The expander roll according to this invention consists of a shaft 10, a large number of cylindrical metal bobbins 12 attached to the outer periphery of the shaft 10 via bearings 11 with a slight gap between them, and two adjacent bobbins. Since it is provided with an annular rubber seal 13 fitted from the inside so as to span the end of the roller 12, unlike a rubber-coated expander roll, it has excellent heat resistance and has a long life.

Further, although the gap between two adjacent bobbins 12 changes due to rotation, an annular protrusion 18 is provided on the outer periphery of the rubber seal 13 to fill the gap between the two bobbins 12. Therefore, the outer peripheries of the bobbin 12 and the protrusions 18 are flush with each other, and there is no gap between the bobbins 12 even during the rotation of the bobbin 12, and the seal 13 does not fall off.

Therefore, there is no risk of damage or wrinkling of the workpiece such as paper due to the gap between the pobbins 12, or staining of the workpiece due to dust or the like clogging the gap.

Furthermore, since the seal 13 and its ridges 18 can be made relatively thick, there is little deterioration due to heat, and the life of the seal 13 is long.

Furthermore, the structure of the seal portion between the pobbins 12 is extremely simple, easy to assemble, and can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing a conventional example, and FIG. 2 is a partially cutaway side view showing an embodiment of this invention. 10...shaft, 11...bearing, 12...
...Metal bobbin, 13...Rubber seal, 18...Protrusion.

Claims (1)

[Scope of utility model registration request] A shaft 10, a large number of cylindrical metal bobbins 12 attached to the outer periphery of the shaft 10 via bearings 11 with some gaps between them, and a structure that straddles the ends of two adjacent bobbins 12. An annular rubber seal 13 is fitted from the inside so that the
and two bobbins 12 on the outer periphery of this seal 13.
An expander roll provided with annular protrusions 18 sandwiched between them to fill gaps.