JP7232151B2 - Bearing lubrication structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lubricating structure for bearings used in rolls and the like used in liquid.

2. Description of the Related Art Conventionally, rolls have been used as means for conveying web-like flexible media such as plastic films, paper, and metal foils. The roll has a cylindrical shape and has a structure in which both ends are rotatably supported by rolling bearings or the like.

In order to apply some treatment to the flexible medium, there is a case where a roll is arranged in the liquid and the flexible medium is caused to run in the liquid by the roll. In such a case, a rolling bearing made of general bearing steel or a stainless steel rolling bearing may be corroded by a liquid. ing.

JP 2012-228679 A

However, if there is dust in the liquid, there is a possibility that the dust will enter the inside of the ceramic bearing and increase the rotational resistance. In addition, there is a possibility that the ceramic bearing may cause rotation failure due to the influence of dust.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lubricating structure for a bearing that can prevent the occurrence of poor rotation of the bearing due to dust or the like when used in liquid. .

In order to solve the above-described problems and achieve the object, a bearing lubrication structure according to the present invention includes a pair of shaft members protruding from both end faces of a roll used in liquid stored in a liquid storage tank. A lubricating structure for a bearing, comprising: a bearing that rotatably supports the shaft member; a bearing support member that supports the bearing; and a hole in the bearing support member that communicates with the inside of the bearing support member. and a supply for supplying the liquid so that the liquid flowing from the hole passes through the bearing and is discharged from the roll side of the bearing support member to the liquid storage tank. and a liquid section.

ADVANTAGE OF THE INVENTION The lubricating structure of the bearing which concerns on this invention is effective in the ability to prevent generation|occurence|production of the rotation defect of a bearing by dust etc., when using in liquid.

FIG. 2 is a front view showing an example of use of a roll using the lubricating structure for bearings according to the first embodiment. FIG. 4 is a side view showing an example of use of a roll using the lubricating structure for bearings according to the first embodiment. FIG. 2 is a cross-sectional view showing an example of a lubricating structure for a bearing according to the first embodiment; The front view which shows an example of the lubricating structure of the bearing which concerns on 1st Embodiment. The front view which shows an example of another structure of a liquid supply part. FIG. 4 is a cross-sectional view showing an example of a structure for uniformizing the flux of liquid supplied from a hole. Sectional drawing and front view which show an example of the lubricating structure of the bearing which concerns on a reference example .

(First embodiment)
An embodiment of a bearing lubrication structure according to the present disclosure will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be replaced and easily conceived by those skilled in the art, or those that are substantially the same.

[Description of schematic structure of bearing]
1 and 2, an example of use of a roll using the lubricating structure for bearings according to the first embodiment will be described. FIG. 1 is a front view showing an example of use of a roll using the lubricating structure for bearings according to the first embodiment. FIG. 2 is a side view showing an example of use of a roll using the lubricating structure for bearings according to the first embodiment.

The film processing apparatus 5 shown in FIG. 1 conveys a film 26 alternately stretched between a plurality of submerged rolls 18 and a plurality of aerial rolls 24 in the direction of arrow B, that is, the positive x-axis direction. The transported film 26 is immersed in a liquid 40 such as a chemical liquid stored in the liquid storage tank 30 . As a result, the film 26 is subjected to a predetermined surface treatment. Since the submerged roll 18 is used while being immersed in the liquid 40, its main components are made of highly corrosion-resistant materials such as stainless steel. Note that the submerged roll 18 is an example of a roll in the present disclosure.

The submerged roll 18 and the air roll 24 are free rolls, and rotate together with the transported film 26 according to the rotation of a winding shaft (not shown) installed downstream in the transport direction of the film 26 . Alternatively, the film 26 may be transported by rotating any of the air rolls 24 with a motor or the like.

The aerial roll 24 is rotatably supported by a bearing (not shown) supported by a bearing support member 27 a installed above the liquid storage tank 30 . Details will be described later.

In FIG. 1, the liquid storage tank 30 is replenished with the liquid 40 through the branch pipe 12a branched from the pipe 12. As shown in FIG. A branch pipe 12b branched from the pipe 12 supplies the liquid 40 whose flow rate is adjusted by the valve 14 to a bearing (not shown) that rotatably supports the submerged roll 18 supported by the bearing support member 34a. be done. The bearing support member 34 a is fixed to the mounting member 22 a installed on the bottom surface of the liquid storage tank 30 .

The flow rate of the liquid 40 supplied to the bearing inside the bearing support member 34a is adjusted by changing the opening degree of the valve 14 while observing the flow meter 16 by the operator. Of course, the degree of opening of the valve 14 may be automatically adjusted by computer control so that the flow rate detected by the flow meter 16 falls within a predetermined range. The liquid 40 supplied to the inside of the bearing support member 34a lubricates the bearing, and the flow of the liquid 40 at that time will be described later.

The liquid 40 in the liquid storage tank 30 accumulates dust adhering to the surface of the film 26 being transported. Therefore, the liquid storage tank 30 is provided with a circulation pipe for removing accumulated dust. That is, liquid 40 is pumped up by pump 32 and filtered by filter 33 . Then, if necessary, the liquid is heated to an appropriate temperature by the heat exchanger 43 and returned to the liquid storage tank 30 . In addition, the liquid storage tank 30 is provided with a discharge port 29 for discharging the liquid 40 exceeding a predetermined amount in order to prevent the liquid 40 from overflowing.

Next, with reference to FIG. 2, the structure of the film processing apparatus 5 will be described from the side. FIG. 2 is a side view of the film processing apparatus 5 cut along the cutting position AA in FIG. 1 and viewed from the positive side of the x-axis.

As shown in FIG. 2, the air roll 24 has a pair of shaft members 25a and 25b projecting from both end faces 24a and 24b. The shaft members 25a and 25b are rotatably supported by bearings (not shown) incorporated in the bearing support members 27a and 27b, respectively. The bearings incorporated in the bearing support members 27a and 27b are, for example, bearings used for general rolling bearings. The bearing support members 27 a and 27 b are fixed to mounting members 31 a and 31 b installed at the upper end of the housing of the liquid storage tank 30 . A lubricant such as grease is enclosed in the bearing support members 27a and 27b, and the bearings are lubricated by the lubricant.

On the other hand, the submerged roll 18 has a pair of shaft members 19a and 19b projecting from both end surfaces 18a and 18b, respectively. The shaft members 19a and 19b are rotatably supported by bearings (not shown) incorporated in the bearing support members 34a and 34b, respectively. The bearing support members 34 a and 34 b are fixed to mounting members 22 a and 22 b installed on the bottom surface of the liquid storage tank 30 . The structure of the bearings built in the bearing support members 34a and 34b will be described later.

The branch pipes 12b are connected to the bearing support members 34a and 34b, respectively. The liquid 40 is supplied to the bearing support members 34a and 34b through the branch pipe 12b.

1 and 2, the liquid 40 is supplied to the bearing support members 34a and 34b through the branch pipe 12a branched from the pipe 12, but the liquid supply method is not limited to this. That is, the circulation pipe may be branched downstream of the heat exchanger 43 to supply the bearing support members 34a and 34b.

[Description of bearing lubrication structure]
Next, the lubricating structure of the bearings of the submerged roll 18 will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a cross-sectional view showing an example of a lubricating structure for a bearing according to the first embodiment. FIG. 4 is a front view showing an example of a bearing lubrication structure according to the first embodiment.

FIG. 3 is a yz sectional view around the bearing support member 34b of FIG. The bearing support member 34b includes a lid portion 37b forming an outer housing, a bearing case 35b, and an inner housing 28b. The bearing case 35b has an annular shape and internally supports a ceramic bearing 36b (an example of a bearing in the present disclosure) that rotatably supports the shaft member 19b. The ceramic bearing 36b is made of, for example, zirconia (silicon nitride), has high corrosion resistance, and can be used in a liquid.

The lid portion 37b is fastened to the bearing case 35b and the inner housing 28b shown in FIG. 3 with four bolts 41, as shown in FIG.

Further, as shown in FIG. 3, the shaft member 19b protruding from the end face 18b of the submerged roll 18 is inserted through the ceramic bearing 36b. An end portion 19c of the shaft member 19b is retained by a C-shaped shaft retaining ring 38. As shown in FIG.

The bearing support member 34b supports a ceramic bearing 36b (bearing), communicates with a gap 44 between the outer circumference of the shaft member 19b and the end 19c, and is stored in the liquid storage tank 30 by communicating with the gap 44. and an opening 42 facing the liquid 40 .

A hole 39 to which the branch pipe 12b is connected is formed in the center of the lid portion 37b, that is, in the vicinity of the axial position of the shaft member 19b supported by the ceramic bearing 36b. The liquid 40 flowing from the hole 39 through the branch pipe 12b passes through the ceramic bearing 36b (bearing) and forms between the bearing support member 34b and the shaft member 19b on the submerged roll 18 side of the bearing support member 34b. The liquid is discharged from the opened opening 42 into the liquid storage tank 30 . Note that the branch pipe 12b is an example of a liquid supply section in the present disclosure.

The flow of the liquid 40 supplied from the branch pipe 12b will be described more specifically. The liquid 40 (arrow F1 in FIG. 3) supplied from the hole 39 hits the end 19c of the shaft member 19b and then radially diffuses along the radial direction of the end 19c (arrow F1 in FIG. 3). F2). Thereafter, the supplied liquid 40 reaches the opening 42 along the outer circumference of the shaft member 19b (arrow F3 in FIG. 3).

When the submerged roll 18 rotates as the film 26 is conveyed, the liquid 40 stored in the liquid storage tank 30 is agitated as the submerged roll 18 rotates. The stirred liquid 40 forms a vortex and attempts to enter the gap 44 through the opening 42 . At this time, the liquid 40 supplied from the hole portion 39 has a force that prevents the liquid 40 in the liquid storage tank 30 from flowing into the gap portion 44 from the opening portion 42, that is, the supplied liquid 40 does not open. Liquid is supplied by the pressure (hydraulic pressure) discharged from the portion 42 .

If the rotation speed of the submerged roll 18 is determined, the pressure Pa (liquid pressure) of the liquid 40 entering the gap 44 from the opening 42 can be predicted to some extent. Therefore, in order to prevent the liquid 40 from entering the gap 44 from the opening 42, the pressure Pb (liquid pressure) of the liquid 40 supplied from the hole 39 should be set so that Pb>Pa. good. Since the rotational speed of the submerged roll 18 can be uniquely obtained from the transport speed of the film 26, the minimum value of the pressure Pb of the liquid 40 to be supplied from the holes 39 is determined according to the transport speed of the film 26. be able to. That is, by measuring in advance the relationship between the transport speed of the film 26 and the pressure Pa and the relationship between the flow rate of the liquid 40 measured by the flow meter 16 and the pressure Pb, the transport speed of the film 26 and Pb>Pa A correspondence table with the flow rate of the liquid 40 for becoming can be created. The operator of the film processing apparatus 5 changes the opening of the valve 14 while looking at the flow meter 16 so as to supply the liquid 40 at a flow rate corresponding to the transport speed of the film 26 by referring to the correspondence table. . Then, the liquid 40 is set to be supplied from the hole 39 at the pressure Pb.

Note that the bearing support member 34a that supports the other shaft member 19a (see FIG. 2) of the submerged roll 18 has the same structure as the bearing support member 34b, so the description thereof will be omitted. That is, the bearing support member 34a includes a lid portion 37a, a bearing case 35a, and an inner housing 28a, all of which are not shown, and supports a ceramic bearing 36a therein.

[Description of another structure of the liquid supply part]
FIG. 5 is a front view showing an example of another structure of the liquid supply section. The lid portion 37b shown in FIG. 5 has holes 39 at three locations. Approximately the same amount of liquid 40 is supplied to the hole 39 at approximately the same pressure through branch pipes 12b, 12c, and 12d.

In FIG. 5, the two branch pipes 12c and 12d are connected at symmetrical positions with respect to the central position of the lid portion 37b to which the branch pipe 12b is connected. As a result, the liquid 40 is evenly supplied to the gap 44, so that a uniform flow of the liquid 40 toward the opening 42 is formed.

[Modification of Embodiment]
Next, a modification of the embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view showing an example of a structure for uniformizing the flux of liquid supplied from a hole.

FIG. 6A shows an example in which the inner surface 37c of the lid portion 37b is shaved off in a conical shape from the outlet of the hole portion 39 toward the periphery of the lid portion 37b. Therefore, the inner surface 37c of the lid portion 37b gradually increases in thickness from the outlet of the hole portion 39 toward the peripheral edge of the lid portion 37b. In FIG. 6(a), the liquid 40 (arrow F1 in FIG. 6(a)) supplied from the hole 39 collides with the end 19c of the shaft member 19b, and then spreads radially and uniformly along the inner surface 37c. It flows (arrow F2 in FIG. 6(a)). Therefore, the liquid 40 is evenly guided to the opening 42 along the outer periphery of the shaft member 19b. That is, the inner surface 37c forms a flux equalizing portion that makes the flow of the supplied liquid 40 uniform.

FIG. 6B shows an example in which the end portion 19d of the shaft member 19b is notched in a concave shape. In FIG. 6(b), the liquid 40 (arrow F1 in FIG. 6(b)) flowing from the hole 39 collides with the end 19d of the shaft member 19b and then changes direction in the radial direction of the end 19d. It flows radially and uniformly (arrow F2 in FIG. 6(b)). Therefore, the liquid 40 is evenly guided to the opening 42 along the outer periphery of the shaft member 19b. That is, the end portion 19d of the shaft member 19b forms a flux equalizing portion that makes the flow of the supplied liquid 40 uniform.

FIG. 6(c) shows an example in which the end portion 19e of the shaft member 19b is formed in a convex shape. In FIG. 6(c), the liquid 40 (arrow F1 in FIG. 6(c)) flowing from the hole 39 hits the end 19e of the shaft member 19b and then changes direction in the radial direction of the end 19e. It flows radially and uniformly (arrow F2 in FIG. 6(c)). Therefore, the liquid 40 is evenly guided to the opening 42 along the outer periphery of the shaft member 19b. That is, the end portion 19e of the shaft member 19b forms a flux equalizing portion that makes the flow of the supplied liquid 40 as uniform as possible.

In addition, you may combine the structure of Fig.6 (a) and the structure of FIG.6(b). Also, the configuration of FIG. 6(a) and the configuration of FIG. 6(c) may be used together.

As described above, in the lubricating structure of the bearing according to the first embodiment, the bearing support members 34a and 34b are a pair of shaft members 19a and 19b projecting from the end faces 18a and 18b on both sides of the submerged roll 18 (roll). Ceramic bearings 36a and 36b (bearings) that rotatably support 19b are supported. Lid portions 37a and 37b having holes 39 communicating with the insides of the bearing support members 34a and 34b are provided on the end portions of the shaft members 19a and 19b of the bearing support members 34a and 34b. A liquid 40 is supplied from the hole portion 39 by the branch pipe 12b (liquid supply portion). The liquid 40 that has flowed through the hole 39 passes through the ceramic bearings 36a and 36b and is discharged from the bearing support members 34a and 34b on the submerged roll 18 side to the liquid storage tank 30 . Therefore, since dust in the liquid 40 does not enter the ceramic bearings 36a and 36b (bearings), it is possible to prevent occurrence of poor rotation of the bearings. As a result, machine downtime for replacing the ceramic bearings 36a, 36b can be reduced. In addition, since the rotational resistance of the submerged roll 18 is reduced, slippage between the submerged roll 18 and the film 26 can be prevented, thereby preventing the film 26 from being scratched, thereby improving the quality of the film 26. can be done. Furthermore, since the ceramic bearings 36a and 36b do not use a lubricant such as grease, it is possible to prevent contamination of the liquid 40 stored in the liquid storage tank 30, thereby preventing deterioration of the quality of the film 26. can.

Further, in the lubricating structure of the bearing according to the first embodiment, the liquid 40 supplied from the branch pipe 12b (liquid supply portion) faces the end surfaces 18a and 18b on both sides of the submerged roll 18 (roll). The liquid is discharged into the reservoir 30 through an opening 42 provided at the position. Therefore, it is possible to reliably prevent the liquid 40 in the liquid storage tank 30, which is swirled by the rotation of the submerged roll 18, from flowing into the gap 44 (inside the bearing support members 34a and 34b) from the opening 42. can be prevented.

Further, in the lubricating structure of the bearing according to the first embodiment, the branch pipe 12b (liquid supply portion) feeds the liquid 40 into the hole portion 39 while the submerged roll 18 is rotating. The liquid is supplied at the pressure discharged to the liquid storage tank 30 . Therefore, since the liquid 40 stored in the liquid storage tank 30 does not flow into the gap 44, dust in the liquid 40 can be prevented from entering the bearing support members 34a and 34b, and the ceramic bearing 36a can be prevented. , 36b and rotation failure can be prevented.

In the lubricating structure of the bearing according to the first embodiment, the branch pipe 12b (liquid supply portion) passes through the hole portion 39 from the end portion 19c side of the shaft members 19a and 19b, at least the shaft members 19a and 19b. A liquid 40 is supplied to the center position. Therefore, the supplied liquid 40 advances uniformly along the ends 19c and outer peripheral portions of the shaft members 19a and 19b after hitting the axial positions of the shaft members 19a and 19b. A uniform flow of the liquid 40 to the opening 42 can be created, thereby preventing the liquid 40 stored in the reservoir 30 from flowing through the opening 42 .

Further, in the lubricating structure of the bearing according to the first embodiment, the branch pipes 12c and 12d (liquid supply portions) are installed at symmetrical positions with respect to the axial positions of the shaft members 19a and 19b. Therefore, a uniform flow of the liquid 40 from the hole 39 to the opening 42 can be created, thereby preventing the inflow of the liquid 40 from the opening 42 .

In the bearing lubrication structure according to the first embodiment, the ends 19d and 19e of the shaft member 19b evenly distribute the liquid 40 supplied from the branch pipe 12b (liquid supply section) to the liquid storage tank 30. forming a leading flux homogenizer. Therefore, it is possible to reliably prevent the liquid 40 from flowing from the liquid storage tank 30 into the bearing support members 34a and 34b.

Further, in the lubricating structure of the bearing according to the first embodiment, the end portion 19d of the shaft member 19b is recessed to form a flux equalizing portion. Therefore, the liquid 40 supplied from the branch pipe 12b (liquid supply portion) can be evenly guided to the opening 42 along the outer circumference of the shaft member 19b.

Further, in the lubricating structure of the bearing according to the first embodiment, the end portion 19e of the shaft member 19b is formed in a convex shape to form a flux equalizing portion. Therefore, the liquid 40 supplied from the branch pipe 12b (liquid supply portion) can be evenly guided to the opening 42 along the outer circumference of the shaft member 19b.

In the bearing lubrication structure according to the first embodiment, the inner surface 37c of the lid portion 37b facing the end portion 19c of the shaft member 19b receives the liquid 40 supplied from the branch pipe 12b (liquid supply portion). , to form a flux equalizing portion that leads to the liquid storage tank 30 evenly. Therefore, it is possible to reliably prevent the liquid 40 from flowing from the liquid storage tank 30 into the bearing support members 34a and 34b.

In the lubricating structure of the bearing according to the first embodiment, the inner surface 37c of the lid portion 37b facing the end portion 19c of the shaft member 19b increases in thickness from the outlet of the hole portion 39 toward the periphery of the lid portion 37b. It forms a flux homogenizer by being conically shaped to increase. Therefore, the liquid 40 supplied from the branch pipe 12b (liquid supply portion) can be evenly guided to the opening 42 along the outer circumference of the shaft member 19b.

In the bearing lubrication structure according to the first embodiment, ceramic bearings 36a and 36b are used for the bearings. Therefore, high durability can be exhibited when used in a liquid.

( Reference example )
A reference example of the lubricating structure for a bearing according to the present disclosure will be described in detail below with reference to the drawings. The reference example is an example of a bearing lubrication structure that does not include the branch pipe 12b (liquid supply portion) described in the first embodiment.

FIG. 7 is a cross-sectional view and a front view showing an example of a lubricating structure of a bearing according to a reference example . That is, FIG. 7A is a yz sectional view of the bearing support member 45b. FIG. 7(b) is a front view of the bearing support member 45b viewed from the y-axis negative side. The bearing support member 45b includes a lid portion 50b forming an outer housing, a bearing case 35b, and an inner housing 28b. The bearing case 35b has an annular shape and internally supports a ceramic bearing 36b (an example of a bearing in the present disclosure) that rotatably supports the shaft member 19b. The ceramic bearing 36b is made of, for example, zirconia (silicon nitride), has high corrosion resistance, and can be used in a liquid.

The lid portion 50b is fastened to the bearing case 35b and the inner housing 28b with four bolts 41, as shown in FIG. 7(b).

A shaft member 19b protruding from the end surface 18b of the submerged roll 18 is inserted through the ceramic bearing 36b. An end portion 19c of the shaft member 19b is retained by a C-shaped shaft retaining ring 38. As shown in FIG.

An oil seal 60 (an example of a sealing member) is mounted in the gap between the inner housing 28b and the shaft member 19b. The oil seal 60 seals the gap between the inner housing 28b and the shaft member 19b, that is, the opening 42 (see FIG. 3) in the first embodiment. In addition, when the liquid 40 in the liquid storage tank 30 exerts a force in a direction to press the oil seal 60, the oil seal 60 itself bends, so that the oil seal 60 is pressed against the shaft member 19b. It is installed in the direction that generates the force. Thereby, the oil seal 60 reliably seals the gap between the inner housing 28b and the shaft member 19b.

That is, a space sealed by the cover portion 50b, the bearing case 35b, the inner housing 28b, and the oil seal 60, that is, the gap portion 44 is formed inside the bearing support member 45b.

In addition, in the lid portion 50b, when the bearing support members 45a and 45b are immersed in the liquid storage tank 30 below the axial center position of the shaft member 19b (negative side of the Z axis), that is, when the bearing support members 45a and 45b are immersed in the liquid storage tank 30, At the position, as shown in FIG. 7B, an introduction port 54 (an example of a first hole in the present disclosure) is formed. The introduction port 54 communicates the inside and the outside of the bearing support member 45 b , that is, the gap 44 and the liquid storage tank 30 . The introduction port 54 introduces the liquid 40 from the liquid storage tank 30 into the gap 44 . A filter case 51 containing a filter 53 made of sintered porous metal powder such as stainless steel is attached to the inlet 54 . The filter 53 captures dust of 10 μm or more, for example, introduced into the gap 44 together with the liquid 40 .

Moreover, in the lid portion 50b, when the bearing support members 45a and 45b are immersed in the liquid storage tank 30, the position of the axial center of the shaft member 19b (positive side of the Z axis), that is, when the bearing support members 45a and 45b are At the position, as shown in FIG. 7B, a discharge port 56 (an example of a second hole in the present disclosure) is formed. The discharge port 56 communicates the inside and the outside of the bearing support member 45b, that is, the gap 44 and the liquid storage tank 30 . The discharge port 56 discharges air from the gap 44 to the liquid storage tank 30 . A filter case 52 containing a filter 53 made of sintered porous metal powder such as stainless steel is attached to the discharge port 56 . The filter 53 catches dust of 10 μm or more, for example, discharged from the gap 44 into the liquid storage tank 30 .

When the submerged roll 18 is immersed in the liquid storage tank 30 , the clearance 44 of the bearing support member 45 b is filled with the liquid 40 by the action of the inlet 54 and the outlet 56 . Ceramic bearing 36b is then lubricated by liquid 40 .

At this time, since dust of 10 μm or more does not flow into the gap 44, the ceramic bearing 36b does not rotate poorly. Furthermore, since lubricating oil such as grease is not enclosed inside the lid portion 50b, the liquid 40 is not contaminated.

It should be noted that the locations where the introduction port 54 and the discharge port 56 are installed are not limited to one location, respectively. That is, multiple inlets 54 and multiple outlets 56 may be provided.

The bearing support member 45a that supports the other shaft member 19a (see FIG. 2) of the submerged roll 18 also has the same structure as the bearing support member 45b, so the description thereof will be omitted. That is, the bearing support member 45a includes a lid portion 50a, a bearing case 35a, an inner housing 28a, and an oil seal 60, all of which are not shown, and supports the ceramic bearing 36a inside. And the cover part 50a is provided with the inlet 54 and the outlet 56 like the cover part 50b.

As described above, in the bearing lubrication structure according to the reference example , the bearing support members 45a and 45b rotate the pair of shaft members 19a and 19b projecting from the end surfaces 18a and 18b on both sides of the submerged roll 18 (roll). It supports possible pivoting ceramic bearings 36a, 36b (bearings). Of the bearing support members 45a and 45b, the end portions of the shaft members 19a and 19b are sealed with lid portions 50a and 50b, and the submerged roll 18 side includes the bearing support members 45a and 45b and the shaft member 19a. , 19b is sealed by an oil seal 60 (sealing member). The lids 50a and 50b are provided with an inlet 54 (first hole) and an outlet 56 (second hole) that communicate the inside and the outside of the bearing support members 45a and 45b. As a result, when the bearing support members 45a and 45b are immersed in the liquid storage tank 30, the liquid 40 stored in the liquid storage tank 30 is introduced into the bearing support members 45a and 45b through the inlet 54, thereby The air accumulated inside 45 a and 45 b is discharged from the discharge port 56 . Therefore, the insides of the bearing support members 45a and 45b are filled with the liquid 40 introduced from the inlet 54, and the ceramic bearings 36a and 36b (bearings) are lubricated by the liquid 40. As shown in FIG. Therefore, it is possible to prevent the ceramic bearings 36a and 36b (bearings) from rotating poorly. As a result, machine downtime for replacing the ceramic bearings 36a, 36b can be reduced. In addition, since the rotational resistance of the submerged roll 18 is reduced, slippage between the submerged roll 18 and the film 26 can be prevented, thereby preventing the film 26 from being scratched, thereby improving the quality of the film 26. can be done. Furthermore, since the ceramic bearings 36a and 36b do not use a lubricant such as grease, contamination of the liquid 40 can be prevented, thereby preventing deterioration of the quality of the film 26. FIG.

In the bearing lubrication structure according to the reference example , the introduction port 54 (first hole) is formed below the axial center position of the shaft member 19b in the lid portion 50b, and the discharge port 56 (second ) is formed above the axial center position of the shaft member 19b in the lid portion 50b. As a result, when the bearing support members 45a and 45b are immersed in the liquid 40, the liquid 40 is introduced into the gap 44 through the inlet 54, and the air inside the gap 44 is discharged through the outlet 56. Therefore, the inside of the gap 44 can be reliably filled with the liquid 40 .

Further, in the lubricating structure of the bearing according to the reference example , the inlet 54 and the outlet 56 are provided with a filter 53 that captures dust in the liquid 40 . Therefore, since dust does not enter the gap 44, it is possible to prevent the ceramic bearings 36a and 36b (bearings) from rotating poorly.

In the bearing lubrication structure according to the reference example , ceramic bearings 36a and 36b are used as the bearings. Therefore, high durability can be exhibited when used in a liquid.

5 Film processing apparatus 12b, 12c, 12d Branch pipe (liquid supply unit) 18 Submerged rolls (rolls) 19a, 19b, 25a, 25b Shaft member 19c End 19d, 19e End Part (flux equalizing part) 24 Air roll 26 Film 27a, 27b, 34a, 34b, 45a, 45b Bearing support member 28a, 28b Inner housing 36a, 36b Ceramic bearing (bearing ), 37a, 37b, 50a, 50b Lid portion 37c Inner surface (flux equalizing portion) 39 Hole portion 40 Liquid 42 Opening portion 44 Gap portion 51, 52 Filter case 53... Filter, 54... Inlet (first hole), 56... Outlet (second hole), 60... Oil seal (sealing member)

Claims (11)

A lubricating structure for a bearing that supports a pair of shaft members protruding from both end surfaces of a roll used in a liquid stored in a liquid storage tank,
a bearing that rotatably supports the shaft member;
a bearing support member that supports the bearing;
a lid portion provided on the end portion side of the shaft member of the bearing support member and having a hole communicating with the inside of the bearing support member;
a liquid supply unit that supplies the liquid so that the liquid that has flowed in from the hole passes through the bearing and is discharged from the roll side of the bearing support member to the liquid storage tank;
Lubricating structure for bearings with The liquid supplied from the liquid supply unit is discharged to the liquid storage tank from openings formed at positions facing both ends of the roll, respectively.
The lubricating structure for a bearing according to claim 1. The liquid supply unit supplies the supplied liquid at a pressure such that the supplied liquid is discharged to the liquid storage tank while the roll is rotating.
The lubricating structure for a bearing according to claim 1 or 2. The liquid supply unit supplies liquid to at least the axial center position of the shaft member from both end sides of the shaft member.
The lubricating structure for a bearing according to any one of claims 1 to 3. The liquid supply unit is further provided at a symmetrical position with respect to the axial position,
The lubricating structure for a bearing according to claim 4. An end portion of the shaft member includes a flux equalizing portion that guides the liquid supplied from the liquid supply portion to the liquid storage tank evenly.
The lubricating structure for a bearing according to any one of claims 1 to 5. The flux equalizing portion is formed by cutting an end portion of the shaft member into a concave shape,
The lubricating structure for a bearing according to claim 6. The flux equalizing portion is formed by molding an end portion of the shaft member into a convex shape,
The lubricating structure for a bearing according to claim 6. The inner surface of the lid portion facing the end portion of the shaft member includes a flux equalizing portion that uniformly guides the liquid supplied from the liquid supply portion to the liquid storage tank,
The lubricating structure for a bearing according to any one of claims 1 to 6. The flux equalizing portion is formed by molding the inner surface of the lid facing the end of the shaft member into a conical shape so that the thickness increases from the outlet of the hole toward the periphery of the lid. is
The lubricating structure for a bearing according to claim 9. The bearing is a ceramic bearing,
The lubricating structure for a bearing according to any one of claims 1 to 10 .

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