JPH0986750A - Expander roll device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the rotating performance, smoothing operation and durabil ity of a roll by protecting a slide part between the roll end part and a roll shaft from rust and adhesion of foreign matter. SOLUTION: A roll main body 3 is so constructed that one rubber outer cylinder 6 is rotatably supported on a roll shaft 1 through plural bearings 4 and plural bobbin cases 5. A bearing 4 positioned in the end part is supported by a slide bush 8 so as to slide following the elongation and contaction of the outer cylinder 6. An expansible shaft cover cylinder 18 is fitted to the roll main body end part which is slid with the slide bush 8 to seal the slide part between the end part of the roll main body 3 and the roll shaft 1. Thus, it is possible to prevent lowering of a sliding function due to rust and foreign matter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expander roll device used for wrinkle extension and wrinkle prevention of sheet materials such as paper, synthetic resin film, cloth and metal foil. Especially the wire part, press part,
The present invention relates to a size press part, a calendar part, an expander roll device used in an environment in which foreign matters such as water and dust are present in the textile industry and the like.

[0002]

2. Description of the Related Art Expander rolls used for wrinkle stretching and wrinkle prevention of a sheet-like product generally include a plurality of bearings mounted at regular intervals on a roll shaft that can bend or has a predetermined bend. It has a structure in which one rubber outer cylinder is rotatably supported via.

It is known that such an expander roll tends to cause thermal expansion or contraction of the rubber outer cylinder due to heat generation of the bearing portion due to long-term operation and use. When the rubber outer cylinder deforms due to thermal expansion or contraction, the surface becomes uneven, which adversely affects the wrinkle-stretching action, and in particular, a large thrust load is applied to the bearings at both ends, resulting in an increase in roll rotation torque. As a result, the smoothness of rotation may be impaired and the rubber outer cylinder may be damaged.

In order to deal with such a problem, conventionally, bearings at least at both ends of the expander roll are supported by a slide bush provided so as to be slidable in the axial direction with respect to the roll shaft, whereby a rubber outer cylinder is provided. The method of allowing the expansion and contraction of the bearing and preventing the thrust load from being applied to the bearing has been taken (Japanese Utility Model Publication No. 57-11965 and Japanese Utility Model Publication No. 60-30261).

Further, when used in an environment where foreign matter such as water or dust is present, in order to prevent such foreign matter from entering the inside of the roll from interfering with the bearing, the inside of the roll is exposed to the outside of the roll. It was devised such that air was continuously discharged toward
529 publication).

[0006]

However, in the conventional expander roll device, various measures have been taken to prevent foreign matter from entering the inside of the roll body. However, between the end of the roll body and the bearing, the roll is provided. The shaft was exposed. For this reason, especially when used in an environment where foreign matter such as water or paper dust exists, the sliding part between the end of the roll body and the roll shaft rusts, and foreign matter such as paper dust adheres to the sliding part. As a result, the slide will not function properly, the deformation of the rubber outer cylinder as described above will adversely affect the wrinkle extension action, rotation failure due to a large thrust load on the bearing, and further damage of the outer cylinder. Such a problem may occur.

Therefore, the problem to be solved by the present invention is to maintain a good rotation and a good wrinkle-extending action of the expander roll even when used in an environment where foreign matters such as water and paper dust exist. , To improve the durability of the expander roll.

[0008]

SUMMARY OF THE INVENTION The present invention protects the roll shaft of an expander roll device, particularly the roll shaft between the roll end and the bearing, from foreign matter such as water and dust, and has a good sliding function of the roll end. This has been achieved as a result of earnest research from the viewpoint of solving the above problems by maintaining.

The expander roll device according to the present invention comprises a non-rotating roll shaft having both ends supported by bearings, and a roll body having a structure in which an outer cylinder is rotatably supported on the roll shaft through a plurality of bearings. In the expander roll device, the bearing located at least at one end is supported slidably in the axial direction with respect to the roll shaft, and the end of the roll main body on the side corresponding to the slidable bearing is located at the end. The roll shaft is slidable in the axial direction with respect to the roll shaft in conjunction with the bearing, and the roll shaft between the roll main body end and the bearing outside the roll main body is covered by a stretchable shaft cover cylinder. The sliding portion between the end of the roll body and the roll shaft is sealed by the cover cylinder.

In the expander roll device, usually, at least bearings at both ends are supported slidably in the axial direction with respect to the roll shaft, and both ends of the roll body are interlocked with the bearings located at the end to roll the roll. Each of the roll shafts is slidable in the axial direction with respect to the shaft, and the roll shafts between the both ends of the roll body and the bearings on the outside thereof are covered with expandable shaft cover cylinders. It is configured by hermetically sealing the slide portion between the roll shaft and the roller shaft. In this case, at least one bearing other than the bearings located at both ends is
It is fixed to the roll axis. When the outer cylinder expands and contracts due to use, at least the bearings located at both ends are slidable in the axial direction, so that an unreasonable thrust load is prevented from being applied to the bearing. That is, the roll body can be expanded and contracted in both end directions according to the expansion and contraction of the outer cylinder.

On the other hand, a bearing located at least at one end is supported slidably in the axial direction with respect to the roll shaft.
It is also possible to fix the bearing located at least at the other end with respect to the roll shaft. Even in this case, when the outer cylinder expands and contracts due to use, the bearing located at least at one end is slidable in the axial direction, so that it is possible to prevent an excessive thrust load from being applied to the bearing. In this case, the roll body can be expanded and contracted only in one direction.

To support the bearing so as to be slidable in the axial direction with respect to the roll shaft, specifically, the bearing is fixed on a slide bush which is slidable in the axial direction with respect to the roll shaft. You can

According to the expander roll device of the present invention, the roll shaft between the end portion of the roll body and the bearing outside the roll body is covered with the shaft cover tube, and the end portion of the roll body and the roll are covered by the shaft cover tube. The sliding part between the shaft and the shaft is sealed. Therefore, it is possible to prevent foreign matter such as water and dust from entering the sliding portion at the end of the roll body, and prevent rusting of the sliding portion and deterioration of the sliding function due to the foreign matter. Further, since the shaft cover cylinder is expandable and contractible, it is possible to cope with expansion and contraction of the roll due to use.

The performance required of the shaft cover cylinder is that it is expandable and contractible and does not allow foreign matter such as water and dust to permeate, and depending on the operating environment, it has water resistance, oil resistance, chemical resistance, and
Heat resistance etc. should be considered. Further, in order to make the shaft cover tube expandable and contractible, specifically, it is preferable that the main body has a bellows shape.

The material of the shaft cover cylinder is preferably rubber, soft plastic, cloth or the like. In addition, the surface of the coil-shaped or ring-shaped core material is covered with rubber, soft plastic, cloth, or the like, or the coil-shaped or ring-shaped core material is embedded in rubber, soft plastic, cloth, etc. It may be formed in a shape. Further, the rubber or soft plastic may be reinforced with woven cloth, non-woven cloth, filler or the like. When a cloth is used, the surface may be waterproofed by coating with rubber or resin, heat treatment, or the like.

More specifically, the end of the roll body of the expander roll device according to the present invention is a non-rotating shaft-side roll body end that is axially slidable with respect to the roll shaft in conjunction with a bearing located at the end. And a roll body end portion of the outer cylinder side that is rotatable with respect to the roll shaft, and one end of the shaft cover cylinder is provided on the shaft side so that the roll shaft is not exposed between the end portion and the roll body end portion. It is attached to the end of the roll body, the other end is fixed to the bearing side, and a sealed chamber is formed between the roll shaft and the shaft cover cylinder. In this way,
Water may enter between the end of the roll body and the roll shaft,
This prevents clogging of paper dust and the like, and the shaft cover cylinder itself expands and contracts in response to expansion and contraction of the roll body.

Further, grease may be filled in a closed chamber formed between the roll shaft and the shaft cover cylinder. When grease is filled, it is possible to completely block the intrusion of foreign matter such as water into the slide part, and also to prevent the slide part from rusting due to moisture, etc. Furthermore, grease serves as a lubricant for the slide part. Since it also plays a role, it becomes possible to maintain a good sliding function for a long period of time.

In this type of expander roll device, a constant gap must be provided between the end of the roll body on the non-rotating shaft side and the end of the roll body on the rotatable outer cylinder side. . Therefore, it is preferable that the expander roll device according to the present invention is provided with a foreign matter intrusion prevention mechanism between the end of the shaft side roll body and the end of the outer cylinder side roll body. By providing the foreign matter intrusion prevention mechanism, it is possible to prevent foreign matter from entering the inside of the roll main body and hinder the bearing portion, and it is possible to favorably maintain the sliding function such as the slide bush inside the roll main body.

The foreign matter intrusion prevention mechanism has, for example, one or more annular rubber packings each having a V-shaped cross section and composed of a main body portion and a lip portion, and the main body portion of the annular rubber packing is the end portion of the axial roll body. It may be fixed to either one of the outer cylinder side roll body end and the lip portion thereof is elastically contacted to the other. If such an annular rubber packing is used, the shaft-side roll body end and the outer cylinder-side roll body end can be slid and rotated, and foreign matter such as water is prevented from entering through the gap between them. It

The foreign matter intrusion prevention mechanism is an air outflow mechanism for continuously discharging air from the inside of the roll body to the outside of the roll body between the end portion of the roll side roll body and the end portion of the outer cylinder side roll body. You may have. The air outflow mechanism can also allow the shaft-side roll body end and the outer cylinder-side roll body end to slide and rotate, and prevent foreign matter such as water from entering through the gap between the two.

It is more preferable that the foreign matter intrusion prevention mechanism is a combination of the annular rubber packing and the air outflow mechanism. This is because the ring-shaped rubber packing prevents foreign matter such as water from entering, but the lip of the rubber packing may wear or crack due to high-speed rotation of the outer cylinder over time. Is. Therefore, if the air outflow mechanism is also used, the air flow acts in the direction of weakening the elastic contact force of the annular rubber packing, so that the wear of the lip portion can be prevented and the cracks due to friction heat can be prevented. Furthermore, since air continuously flows out from the gap between the end of the shaft side roll body and the end of the outer cylinder side roll body, it is possible to effectively prevent foreign matter such as water from entering.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing one end of an expander roll device for papermaking machines according to an embodiment of the present invention. The other end also has the same structure as that shown.

In the figure, (1) shows bearings (2) at both ends.
And a curved roll shaft having a predetermined curved line supported by. The roll shaft (1) may have a predetermined degree of curvature, or may have a degree of curvature that can be adjusted. (3) is a roll body, and one rubber outer cylinder (6) is rotatably supported on the roll shaft (1) via a plurality of bearings (4) and a plurality of bobbin cases (5). It has a structured structure.

(7) is a key groove formed in the axial direction on the end surface of the roll shaft (1). (8) is the keyway (7)
It is a slide bush having a slide key (9) slidably fitted in. An end bearing (4) is fixed on the slide bush (8). Therefore, the end bearing (4) can slide in the axial direction with respect to the roll shaft following the expansion and contraction of the rubber outer cylinder due to use. Although the bearings (4) other than the ends are not shown, the bearings (4) near the ends are supported by similar slide bushes (8), and the slide width gradually decreases toward the center. Is designed to be. Then, at least one bearing (4) in the central portion is fixed so as not to slide with respect to the roll shaft (1).

The outer cylinder (6) is attached to the end of the roll body on the outer cylinder side.
An annular metal draining cap (1
0). The water draining cap (10) has a water draining convex edge (10a) protruding outward at an outer peripheral edge portion and an annular recess (10b) for mounting an annular rubber packing (11) on an outer surface thereof.

On the other hand, at the end of the roll main body on the shaft side, a disk-shaped end cover plate (oppositely located with a predetermined gap (12) between the outer surface of the draining cap (10) ( 1
3). The end cover plate (13) is fixed to the end surface of the slide bush (8), and is interlocked with the bearing (4) and the slide bush (8) at the end to axially rotate with respect to the roll shaft (1). It is possible to slide. Further, the end cover plate (13) has an annular recess (13a) for mounting the annular rubber packing (14) on its inner surface.

In the gap (12) between the water draining cap (10) and the end cover plate (13), two annular rubber packings (11) (14) are provided inside and outside. One of the annular rubber packings (14) located inside has a V-shaped cross section composed of a main body portion (14a) and a lip portion (14b), and the lip portion (14b) of the drain cap (10). The main body (14
a) is an annular recess (13a) on the inner surface of the end cover plate (13)
Is fitted into. The other annular rubber packing (11) located on the outer side also has a V-shaped cross section including a main body portion (11a) and a lip portion (11b). In the annular rubber packing (11), the main body (11a) is an annular recess (10b) on the outer surface of the drain cap (10) in a state where the lip portion (11b) is elastically contacted with the inner surface of the end cover plate (13). ).

Further, an air outflow mechanism is provided at the end of the roll body (3). That is, at the end of the roll body (3), from the outer surface of the end cover plate (13), through the inside of the end cover plate (13) to the end surface of the slide bush (8), and further inside the slide bush (8). An air passage (15) is drilled through which leads to the inside of the gap (12). The end cover plate (13) side of the air passage (15) is connected to the compressed air supply source (17) via the air supply hose (16). Therefore, the air discharged from the compressed air supply source (17) passes through the air supply hose (16) and the air passage (15), and the gap (12) between the end cover plate (13) and the drain cap (10).
It is continuously fed into the inside of the roll body (3) and then discharged from the inside of the roll body (3) to the outside of the roll body (3) through the gap (12).

As described above, in this expander roll device, the two annular rubber packings (11) (1
4) and an air outflow mechanism are used together to provide a foreign matter intrusion prevention mechanism. Therefore, the annular rubber packings (11) (14)
This prevents foreign matter such as water from entering. Further, the air flow due to the air outflow mechanism is caused by the annular rubber packing (11).
Since it acts in the direction of weakening the elastic contact force of (14), it is possible to prevent wear of the lip portions (11b) and (14b) and also to prevent the occurrence of cracks due to frictional heat. Furthermore, since air continuously flows out from the gap (12) between the end cover plate (13) and the water draining cap (10), foreign matter such as water can be effectively prevented from entering.

The roll shaft (1) between the end cover plate (13) and the bearing (2) is covered by an expandable shaft cover cylinder (18). One end of the shaft cover cylinder (18) is
The roll shaft (1) is fixed to the shaft cover mounting member (19) fixed to the outside of the end cover plate (13) by a tightening band (20) so as not to be exposed. The shaft cover mounting member (19) slides in the axial direction with respect to the roll shaft (1) in conjunction with the movement of the slide bush (8).
The other end of the shaft cover cylinder (18) is fixed to a shaft cover mounting member (21) fixed to the bearing (2) side by a tightening band (22). An O-ring (23) is fitted on the inner peripheral surface of the shaft cover mounting member (21) to prevent foreign matter such as water from entering between the roll shaft (1) and the shaft cover cylinder (18). To prevent. Thus, the roll axis (1)
A closed chamber (24) is formed between the shaft cover cylinder (18) and the shaft cover mounting member (19) provided at the end of the roll body (3) and the slide shaft (1). Is closed by a shaft cover tube (18).

The shaft cover cylinder (18) is made of rubber,
It has a bellows shape. A coil-shaped core material (25) is embedded in the shaft cover cylinder (18). In this way, the shaft cover cylinder (18) is reinforced by the core material (25) and formed in a bellows shape, so that it can be expanded and contracted.

Further, the sealed chamber (24) is filled with grease through a grease passage (27) from a grease nipple (26) provided on the outer peripheral surface of the end of the shaft cover mounting member (21). .

In this way, the slide portion between the shaft cover mounting member (19) provided at the end of the roll body (3) and the roll shaft (1) is sealed by the expandable shaft cover cylinder (18). Therefore, it is possible to prevent water or the like from entering the slide portion or clogging of paper dust or the like. Furthermore, since the sealed chamber (24) is filled with grease, it is possible to completely block intrusion of foreign matter such as water into the slide portion and prevent the slide portion from rusting due to moisture or the like. . Furthermore, since the grease also serves as a lubricant for the sliding portion, it becomes possible to maintain a good sliding function for a long period of time.

[0034]

According to the expander roll device of the present invention, since the sliding portion between the end of the roll body and the roll shaft is sealed by the expandable shaft cover cylinder, foreign matter such as water or dust is rolled. It is possible to prevent the slide portion at the end portion of the main body from entering, and it is possible to prevent deterioration of the slide function due to rust or foreign matter of the slide portion. For this reason, even if the outer cylinder expands or contracts due to long-term operation and use, the bearing at the end of the roll body can follow it and slide well. Therefore, the roll surface does not become non-uniform and the wrinkle spreading action is not adversely affected. Further, since an unreasonable thrust load is not applied to the bearing, the rotational torque of the roll is not increased, the smoothness of rotation is impaired, and the outer cylinder is not damaged.

When grease is filled in the closed chamber formed between the roll shaft and the shaft cover cylinder, foreign matter such as water can be completely blocked from entering the slide portion, and moisture can be prevented. This also prevents the slide part from rusting. Moreover, since the grease also serves as a lubricant for the slide portion, it becomes possible to maintain a good slide function for a long period of time.

Further, by additionally using a foreign matter invasion preventing mechanism such as an annular rubber packing having a V-shaped cross section at the end of the roll body or an air outflow mechanism, foreign matter such as water intrudes into the inside of the roll body and the bearing portion and the roll body. It can prevent the internal slide bushing from being damaged. Therefore, by the synergistic action of the slide mechanism at the end of the roll body, the foreign matter intrusion prevention mechanism, and the expandable shaft cover cylinder, the expander roll maintains good rotation and good wrinkle-stretching action, and The durability can be improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing one end of an expander roll device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Roll Shaft 2 Bearing 3 Roll Body 4 Bearing 6 Rubber Outer Cylinder 7 Key Groove 8 Slide Bushing 9 Slide Key 10 Drainer Cap 11, 14 Annular Rubber Packing 13 End Cover Plate 17 Compressed Air Supply Source 18 Shaft Cover Cylinder 24 Closed Chamber

Claims (8)

[Claims] 1. An expander roll device comprising a non-rotating roll shaft having both ends supported by bearings and a roll body having a structure in which an outer cylinder is rotatably supported on the roll shaft through a plurality of bearings. The bearing located at least at one end is slidably supported in the axial direction with respect to the roll shaft, and the end of the roll main body on the side corresponding to the slidable bearing rolls in conjunction with the bearing located at the end. The roll shaft is slidable in the axial direction with respect to the shaft, and the roll shaft between the roll body end portion and the bearing outside the roll body is covered by a stretchable shaft cover cylinder, and the roll body end is covered by the shaft cover cylinder. An expander roll device, characterized in that a slide part between the roll part and the roll shaft is sealed. 2. An expander roll device comprising a non-rotating roll shaft whose both ends are supported by bearings and a roll main body having a structure in which an outer cylinder is rotatably supported on the roll shaft through a plurality of bearings. , At least the bearings located at both ends are slidably supported in the axial direction with respect to the roll shaft, and the both ends of the roll main body slide in the axial direction with respect to the roll shaft in conjunction with the bearings located at the end parts. It is possible that the roll shafts between both ends of the roll body and the bearings on the outside thereof are respectively covered by the expandable shaft cover cylinders, and the shaft cover cylinders are provided between the roll body ends and the roll shafts. An expander roll device characterized in that the slide portion is sealed. 3. The expander roll device according to claim 1, wherein the shaft cover cylinder has a bellows shape. 4. The non-rotating shaft-side roll main body according to claim 1, wherein the end of the roll main body is axially slidable with respect to the roll shaft in association with a bearing located at the end. It has an end portion and an outer cylinder side roll body end portion that is rotatable with respect to the roll shaft, and one end of the shaft cover cylinder has a shaft so that the roll shaft is not exposed between the end portion and the roll body end portion. It is attached to the end of the side roll body and the other end is
An expander roll device fixed to the bearing side and having a sealed chamber formed between the roll shaft and the shaft cover cylinder. 5. The expander roll device according to claim 4, wherein the sealed chamber formed between the roll shaft and the shaft cover cylinder is filled with grease. 6. The expander roll device according to claim 4, further comprising a foreign matter intrusion prevention mechanism provided between the shaft-side roll body end and the outer cylinder-side roll body end. 7. The foreign matter intrusion prevention mechanism according to claim 6, wherein the foreign matter intrusion prevention mechanism has one or more annular rubber packings each having a V-shaped cross section and including a main body portion and a lip portion. An expander roll device which is fixed to either one of the roll body end and the outer cylinder side roll body end, and whose lip is elastically contacted with the other. 8. The foreign matter intrusion prevention mechanism according to claim 6 or 7, wherein air is introduced from the inside of the roll body to the outside of the roll body between the shaft side roll body end portion and the outer cylinder side roll body end portion. An expander roll device having an air outflow mechanism for continuously outflowing.