JP2019143776A - Rolling bearing - Google Patents

Abstract

An object of the present invention is to provide a rolling bearing having a metal sealing plate, and to increase the effect of preventing the entry of foreign matter into the bearing by the sealing plate at a low cost.
A metal sealing plate 6 of a rolling bearing fixed to either one of an outer ring 2 or an inner ring 3 is mounted as the non-fixed end side of the sealing plate 6 moves away from the fixed side of the sealing plate 6. Inclined in the direction of displacement outward in the axial direction.
[Selection] Figure 1

Description

  The present invention relates to a rolling bearing provided with a sealing plate that prevents entry of foreign matter into the bearing at the entrance of a space between an inner ring and an outer ring, and more particularly to a rolling bearing provided with a metal sealing plate.

  As a prior art of a rolling bearing, one described in Patent Document 1 below is known. The rolling bearing described in this document is provided with a sealing plate that seals the inlet portion at the inlet portion of the space for the purpose of preventing foreign matters from entering the bearing (the space between the outer ring and the inner ring).

  The rolling bearing of Patent Document 1 is used for an application in which an axially arranged shaft (hereinafter referred to as a vertical axis) is supported by an inner ring. In such an application, the rolling bearing is arranged on both sides of the space. Among the two sealing plates, foreign matter such as oil dropped on one sealing plate arranged upward is accumulated, and the foreign matter is sealed plate and raceway (outer ring and inner ring, the sealing plate is There is a risk of entering the inside of the bearing from the abutting portion of the sliding surface of the non-fixed ring) or a minute gap between the sliding surfaces.

  Therefore, the rolling bearing of Patent Document 1 is provided with a protrusion functioning as a weir on the outer wall of the sealing plate, so that the sealing plate and the race ring (the outer ring and the inner ring on the side where the sealing plate is not fixed) slide. Intrusion of foreign matter into the bearing from a butt portion of the surfaces or a minute gap between the sliding surfaces is suppressed.

  FIG. 9 shows a rolling bearing provided with a sealing plate (shield plate) proposed in Patent Document 2 below. The rolling bearing 1 ′ in FIG. 9 includes an outer ring 2, an inner ring 3, a rolling element 5 (ball in the figure) held between the inner and outer rings by being held by a cage 4, and fixed to the inner ring 2. -It is comprised with the sealing board (shield board) 6 'arrange | positioned in the entrance part of the space between outer rings.

JP 2003-148495 A JP2015-59613A

  Sealing plates made of organic materials such as resin and rubber, or composites of these organic materials and metals may be avoided depending on the usage environment of rolling bearings. A board is adopted.

  However, when the metal sealing plate is manufactured by press molding, it is difficult to provide a projection that functions as a weir on the outer wall. For this reason, the foreign substance intrusion prevention measure by the method proposed in Patent Document 1 is difficult to apply in applications where a metal sealing plate is required.

  In the case where a metal press-molded product is used as the sealing plate (shield plate) 6 ', a sealing plate having no protrusion on the outer wall 6c has been conventionally employed as shown in FIG.

  As a countermeasure to the above problem, it is conceivable to attach a separately processed protrusion on the outer wall of a press-molded metal sealing plate, but this method is not practical, and for mass production It is not suitable, and the manufacturing cost cannot be ignored.

  Therefore, an object of the present invention is to increase the effect of preventing the entry of foreign matter into the bearing by the sealing plate with respect to a rolling bearing having a metal sealing plate.

In order to solve the above problems, in the present invention, a metal sealing plate is fixed to either the outer ring or the inner ring, and the non-fixed end of the sealing plate is connected to the other race ring (the outer ring or the inner ring is sealed). A rolling bearing that faces the side where the plate is not fixed) and seals the entrance of the space formed between the outer ring and the inner ring with the sealing plate,
The non-fixed end side of the sealing plate is inclined in a direction to be displaced outward in the axial direction of the bearing as it is separated from the fixed side of the sealing plate.

  In addition to the sealing plate having the entire outer wall inclined in the same direction from the non-fixed end side to the fixed end side, the outer wall is inclined in the middle of the radial direction, and the remaining portion is inclined. It is conceivable that the outer wall is in a non-fixed state, or that the fixed end side of the outer wall is inclined in the direction opposite to the non-fixed end side, that is, in the direction displaced inward in the axial direction of the bearing as it moves away from the fixed side.

  The bearing ring for fixing the sealing plate is provided with a recess on the side surface that extends in the radial direction from the inner diameter surface to the outer diameter surface, or the sealing plate is on the fixed side end, and the outer side in the axial direction of the fixed side end. It is also conceivable to have a notch (slit) for separating the part in the circumferential direction, and that the notch is arranged at a position corresponding to the recess (position where the circumferential phase overlaps).

  A plurality of the cuts can be provided on the outer side in the axial direction of the fixed side end of the sealing plate with an appropriate interval in the circumferential direction. In a rolling bearing provided with a sealing plate having a plurality of cuts, the recesses may be arranged at positions corresponding to at least one of the cuts.

  When the sealing plate is fixed to the raceway on the rotating side when the bearing is used, the concave portion is provided in the outer ring, and the notch is further formed in the outer side in the axial direction of the outer diameter side end of the sealing plate. It is good to provide.

  The non-fixed end side of the sealing plate is preferably opposed to the other raceway through a minute gap.

  The rolling bearing according to the present invention is remarkably effective when the inner ring is fitted on the vertical axis of the apparatus having the vertical axis and one sealing plate is faced upward. The vertical axis may be either a fixed shaft or a rotary shaft, and the one that fixes the inner ring to the fixed vertical axis can be used as a guide roller by bringing the outer ring into contact with the guide rail.

  For example, a tenter clip of a transverse stretching device of a film stretching machine, which will be described in detail later, is provided with a guide roller that supports an inner ring with a fixed vertical axis and rolls a rotatable outer ring on a guide rail. The rolling bearing of the invention can be used as a guide roller for a tenter clip of the transverse stretching apparatus, and in particular, an excellent effect can be expected in the use.

  The present invention includes a horizontally long guide rail, a guided member guided by the guide rail, a vertically arranged fixed shaft supported by the guided member, and a guide roller supported by the fixed shaft. The guide roller is constituted by a rolling bearing having an inner ring fitted on the fixed shaft, an outer ring rolling on the guide rail, and a rolling element disposed between the inner and outer rings, and the rolling bearing. However, the present invention also provides a moving guide device that is the rolling bearing of the present invention.

  Further, as a specific example of the apparatus having the moving guide device, it has a horizontally long guide rail and a tenter clip as a guided member guided by the guide rail, and the tenter clip is vertically oriented on the tenter clip. A vertical axis that is fixed to the vertical axis, and a vertical axis guide roller that is supported by the vertical axis. The vertical axis guide roller rolls on an inner ring that is externally fitted to the vertical axis, and on the guide rail. The present invention also provides a lateral stretching device for a film stretching machine, which is composed of an outer ring and a rolling bearing having rolling elements arranged between the inner and outer rings, and the rolling bearing is the rolling bearing of the present invention.

  In the rolling bearing according to the present invention, since the non-fixed end side of the sealing plate is inclined in a direction to be displaced outward in the axial direction of the bearing as it is separated from the fixed portion, the non-fixed end of the foreign matter dropped or dropped on the sealing plate It is possible to prevent the movement to the side and prevent the end of the non-fixed side from entering the bearing.

  According to this structure, since it is possible to suppress the movement of the foreign matter to the non-fixed side end portion without providing a protrusion or a step portion functioning as a weir, it is possible to realize the prevention of the entry of the foreign matter into the bearing at a low cost. .

  In addition, when the fixed end side of the sealing plate is inclined in the direction opposite to the non-fixed end side, foreign matter can be prevented from entering the bearing from the fixing portion of the sealing plate.

  If the side of the bearing ring that fixes the sealing plate is provided with a recess extending in the radial direction from the inner diameter surface to the outer diameter surface, foreign matter that tends to accumulate in the vicinity of the fixing portion of the sealing plate is removed from the recess to the outside. Can be discharged.

  If the notch that cuts off the axially outer side of the fixed side end in the circumferential direction is provided on the fixed side end of the sealing plate, foreign matter is discharged through the notch and the recess. The discharge efficiency of foreign matter is further increased compared to the provided one.

  The sealing plate is fixed to the raceway on the rotating side when the bearing is used, the recess is provided in the outer ring, and the notch is provided in the outer side in the axial direction of the outer diameter side end of the sealing plate. The foreign matter accumulated on the sealing plate in the upward state is forced to flow radially outward by the centrifugal force accompanying the rotation of the sealing plate and is discharged to the outside through the notches and the recesses. Effectively done.

  In addition, when the non-fixed end of the sealing plate is opposed to the other raceway through a minute gap, the metal sealing plate is a non-contact type, which prevents an increase in bearing rotational torque. it can.

  In a rolling bearing having a non-contact type sealing plate, it is inevitable that foreign matters enter the bearing from the non-contact seal portion. In the rolling bearing according to the present invention, the position of the outer wall of the sealing plate protrudes outward in the axial direction of the bearing on the side where the non-contact seal portion is formed. However, it is difficult to reach the gap between the non-contact seal portions.

  In addition to this, the foreign matter deposited on the sealing plate moves in a direction away from the non-contact sealing portion due to the inclination of the sealing plate. Thereby, even if it is a non-contact-type sealing board, the penetration | invasion of the foreign material to the inside of a bearing reduces compared with a conventional product, and the lifetime shortening resulting from the foreign material of a bearing is suppressed effectively.

  In the device that supports the vertically arranged fixed shaft and the rotating shaft using the rolling bearing of the present invention, the intrusion of foreign matter into the bearing is reduced and the durability of the device is improved.

  Furthermore, the movement guide device of the present invention and the lateral stretching device of a film stretching machine, which is a specific example of the device having the movement guide device, also reduce the intrusion of foreign matter into the bearing and improve the durability of the device.

It is a partial notch perspective view which shows an example of the rolling bearing of this invention. It is the expanded sectional view which looked directly at the location of the fracture surface of the rolling bearing of FIG. It is a side view of the rolling bearing of FIG. FIG. 4 is a view in the A direction of FIG. 3 (a side view of a notch and a recess installation portion). It is a partial notch perspective view which shows the other example of the rolling bearing of this invention. It is the expanded sectional view which looked directly at the location of the fracture surface of the rolling bearing of FIG. It is sectional drawing of the horizontal extending | stretching apparatus of a film extending machine. It is a conceptual diagram which shows the guide rail of the horizontal extending | stretching apparatus of a film extending machine. It is sectional drawing of the rolling bearing provided with the conventional metal sealing board employ | adopted as a guide roller of the horizontal extending | stretching apparatus of a film extending machine.

  Hereinafter, based on FIGS. 1 to 8 of the accompanying drawings, an embodiment of a rolling bearing of the present invention and a lateral stretching device of a film stretching machine having the rolling bearing will be described.

  An example of the rolling bearing of this invention is shown in FIGS. The illustrated rolling bearing 1 is a deep groove ball bearing which is held by an outer ring 2, an inner ring 3, and a cage 4 and is incorporated between raceway surfaces 2 a and 3 a (see FIG. 2) of the inner and outer rings. (Ball) and two sealing plates 6.

  A space 7 exists between the outer ring 2 and the inner ring 3, and the sealing plate 6 is disposed at the inlet portions on both sides of the space 7, and the inlet portion of the space 7 is sealed by the sealing plate 6.

  The sealing plate 6 is a metal press-formed product. The radially outer end portion of the sealing plate 6 is processed as a bent portion 6a in a shape close to a cylinder, and the bent portion 6a is a latch formed on a shoulder portion (near both sides) on the inner diameter side of the outer ring 2. Engaged with the groove 2 b, the radially outer end portion (winding portion 6 a) of the sealing plate 6 is fixed to the outer ring 2.

  As shown in FIG. 2, a skirt portion 6 b that is bent inward in the axial direction is formed at an end portion of the sealing plate 6 on the non-fixed side, and the skirt portion 6 b is formed on the shoulder portion on the outer diameter side of the inner ring 3. The groove 3 b faces the groove 3 b with a small gap, and a non-contact seal portion is created between the non-fixed side end of the sealing plate 6 and the inner ring 3.

  The sealing plate 6 is inclined in a direction in which the outer wall 6c is displaced outward in the axial direction (direction in which the shaft center of the bearing extends) as the outer wall 6c moves toward the non-fixed side end (the rolling bearing 1 illustrated as an inner diameter side). As a result, foreign matter (mainly liquid such as oil) dropped or dripped onto the outer wall 6c of the sealing plate 6 flows to the outer diameter side and is prevented from moving to the inner diameter side, and enters the bearing from the non-contact seal portion. Intrusion (penetration) of foreign matter is effectively suppressed.

  The apex of the inclination of the outer wall 6c (the maximum displacement point outward in the axial direction) V may protrude from the side surface of the outer ring 2 to the outside of the bearing. In a posture in which the vertical direction of the outer wall 6c is used, the foreign matter on the outer wall 6c can be discharged from the side surface of the outer ring to the outer diameter side before the foreign matter gets over the vertex V of the outer wall 6c.

  In FIG. 2, the inclination of the outer wall 6c is in a state where the entire region is inclined in the same direction from the non-fixed end side to the fixed end side of the sealing plate 6, but the inclination is the non-fixed end of the outer wall 6c. It may be from the side to the middle in the radial direction, and the remaining portion of the outer wall 6c may be in a state without inclination.

  1 to 4 is a recess provided on the side surface of the outer ring 2 (in the drawing, it is an arc-shaped groove), and 9 is provided in a bent portion 6a that is a fixed side end of the sealing plate 6. It is a notch (slit). The notch 9 cuts off the outer side in the axial direction of the bent part 6a in the circumferential direction, and it is on a virtual line (not shown) extending radially from the center of the sealing plate 6.

  A plurality of the recesses 8 and the notches 9 are provided at a constant pitch in the circumferential direction (six in the drawing). The respective recesses 8 and the notches 9 are in positions corresponding to each other, that is, positions where the phases in the circumferential direction are aligned.

  The illustrated rolling bearing 1 can be expected to be particularly excellent in applications where the outer ring 2 rotates during use. Since the sealing plate 6 is fixed to the outer ring 2, the sealing plate 6 also rotates with the rotation of the outer ring 2, so that centrifugal force is applied to the foreign matter accumulated on the one upward facing sealing plate 6 when using the vertical axis. It acts and the foreign matter is easily discharged to the outer diameter side through the notch 9 and the recess 8.

  Although the number of the recesses 8 is the same as the number of the notches 9, the recesses 8 may be provided at a position corresponding to at least one of the plurality of notches 9, and foreign matter is discharged via the recesses 8 even in the structure.

  In applications where the outer ring 2 rotates during use, it is also conceivable to fix the sealing plate 6 to the inner ring 3 and form a non-contact seal portion between the outer ring 2 and the outer ring 2. However, in this structure, even if the apex V of the inclination of the outer wall 6c of the sealing plate 6 is on the outer ring 2 side, there is a risk that foreign matter that has received centrifugal force may get over the apex V and reach the non-contact seal portion. In an application in which the outer ring 2 rotates during use, the sealing plate 6 may be fixed to the outer ring 2 as shown in the figure and a non-contact seal portion may be formed between the inner ring 3 and the outer ring 2. By doing in that way, it can control effectively that a foreign substance moves to the non-contact seal part side.

  Even in applications where the inner ring 3 rotates during use, the sealing plate 6 is preferably fixed to the outer ring 2 and a non-contact sealing portion is formed between the inner ring 3 and the sealing ring 6. By doing in this way, the non-contact seal part is formed between the outer ring | wheels 2, and the malfunction which the foreign material which received the centrifugal force concentrates on the non-contact seal part side can be eliminated.

  5 and 6 show another example of the rolling bearing of the present invention. The basic configuration of the rolling bearing 1A shown in FIGS. 5 and 6 is the same as that of the rolling bearing 1 shown in FIG. The structural difference from the rolling bearing 1 of FIG. 1 is that the shape of the sealing plate 6 is made different.

  The sealing plate 6 provided in the rolling bearing 1A of FIGS. 5 and 6 is formed such that the outer diameter side edge portion is not a bent portion but a skirt portion 6d bent inward in the axial direction. 6d is press-fitted into a groove 2c formed in the shoulder on the inner diameter side of the outer ring 2 and fixed.

  Further, the sealing plate 6 is inclined in a direction in which the outer wall 6c is displaced from the middle in the radial direction toward the non-fixed end side toward the outside in the axial direction of the bearing, and the fixed end side (outer diameter side) of the outer wall 6c is also It is inclined in the direction opposite to the inclination direction on the non-fixed end side, that is, in the direction displaced inward in the axial direction of the bearing as it is separated from the fixed end side.

  Thus, when the fixed end side of the outer wall 6c is inclined in the direction opposite to the inclination direction of the non-fixed end side, even if the sealing plate 6 rotates together with the outer ring 2, the foreign matter on the sealing plate 6 is fixed side. Thus, the foreign matter is held on the outer wall 6 c of the sealing plate 6. This makes it difficult for foreign matter to enter the bearing from the fixed portion (fixed seal portion) of the sealing plate 6.

  Foreign matter held on the outer wall 6c of the sealing plate 6 can be discharged to the outside of the bearing by centrifugal force when the sealing plate 6 rotates together with the outer ring 2.

  The sealing plate 6 of the illustrated rolling bearing 1A is such that the position of the apex V of the inclination on the inner diameter side (non-fixed end side) of the outer wall 6c is inclined on the outer diameter side (fixed end side) of the outer wall 6c when the longitudinal axis of the bearing is used. It is designed to be higher than the apex of the outer diameter, and due to the difference in the height position of the apex of the slope on the outer diameter side, foreign matter reaches the inner diameter side where the non-contact seal part is formed compared to the outer diameter side It is difficult to do.

  The sealing plate 6 shown in FIGS. 5 and 6 is provided with a flat portion 6e in consideration of press-fitting attachment of the sealing plate 6 to the outer ring 2, and attachment work can be performed by applying a press-fitting tool to the flat portion 6e.

  The rolling bearing 1 </ b> A shown in FIGS. 5 and 6 can also be provided with the above-described concave portion 8 serving as a foreign matter discharge path on the side surface of the outer ring 2. The sealing plate 6 in FIGS. 5 and 6 provided with the skirt portion 6d on the outer diameter side edge is provided with a hole for allowing the inside of the bearing to communicate with the sealing plate 6 when the notch 9 described above is provided on the outer diameter side. Therefore, the sealing plate 6 in FIGS. 5 and 6 has a shape in which the notch 9 does not exist.

  The rolling bearing of the present invention as described above is suitable for use in applications in which the inner ring 3 is fitted on the vertical axis of the apparatus having a vertical axis and one sealing plate 6 faces upward. The vertical axis supported by the bearing may be a fixed axis or a rotary axis.

  The rolling bearing that fixes the inner ring 3 to the fixed vertical axis can be used as a guide roller.

  An example of an apparatus using a rolling bearing as a guide roller is shown in FIG. The apparatus shown in FIG. 7 is a transverse stretching apparatus of a film stretching machine. Although the film stretching machine is not shown, an extruder, a die head, a cooling device, a longitudinal stretching device, a lateral stretching device, and a take-up winder are continuously arranged in the processing line.

  The molten resin discharged from the die head via the extruder is cooled and formed into a sheet by a cooling device. Thereafter, the film is stretched in the machine direction by a multistage roll, and further stretched in the transverse direction by a tenter clip of a transverse stretching apparatus. And the film obtained through the above process is heat-processed and wound up in roll shape.

  The transverse stretching device 10 of the film stretching machine shown in FIG. 7 includes a tenter clip 11 and guide rails 20 as shown in FIG. 8 disposed on the left and right sides of the film to be fed.

  The distance between the left and right guide rails 20 gradually increases in the direction of the line, and the film F gripped by the tenter clip 11 is guided by the tenter clip 11 on the guide rail 20. To be extended to.

  A large number of tenter clips 11 are connected in a chain shape and attached to the guide rail 20. As shown in FIG. 7, the tenter clip 11 includes a grip portion 12 that grips both ends of the film F after longitudinal stretching, a vertical guide roller 13 that rolls on a guide rail 20 configured by a closed loop, and a horizontal shaft. It has a guide roller 14, a vertical axis (vertical support shaft) 15 that supports the vertical guide roller 13, and a horizontal shaft (horizontal support shaft) 16 that supports the horizontal guide roller 14. The vertical axis 15 and the horizontal axis 16 are fixed to the tenter clip 11.

  The guide rail 20 has a first guide surface 20a facing in the horizontal direction and a second guide surface 20b facing in the vertical direction.

  The first guide surface 20a is provided with two surfaces, an upward surface and a downward surface, and the two horizontal axis guide rollers 14 are individually guided to the two first guide surfaces 20a. Thus, the tenter clip 11 is positioned in the height direction.

  The second guide surface 20b also has a pair of two surfaces facing away from each other, and the pair of second guide surfaces 20b guides the pair of longitudinal guide rollers 13 to form the tenter clip 11. Positioning in the lateral direction is performed.

  Note that the guide portions of the pair of vertical guide rollers 13 by the second guide surface 20b are provided at two locations in the vertical direction, and the posture of the tenter clip 11 is held by the two vertical guide roller guide portions. .

  The tenter clip 11 configured as described above grips both end portions of the film F with the grip portion 12, and proceeds in the traveling direction along the guide rail 20 in this state. Thereby, the film F is stretched sideways.

  For the vertical guide roller 13 and the horizontal guide roller 14, deep groove ball bearings and double-row angular ball bearings are frequently used. In the tenter clip 11 of the transverse stretching apparatus 10 of the illustrated film stretching machine, the deep groove ball bearing of the invention of FIG. 1 or FIG.

  With respect to the transverse stretching device 10 of the illustrated film stretching machine, the upper seal in the upward arrangement in which the lubricating oil or the like adhering to the tenter clip 11 or the guide rail 20 is included in the deep groove ball bearing used as the vertical guide roller 13 is used. Dripping on the board inevitably occurs.

  When the rolling bearing shown in FIG. 9 having a metal sealing plate is used as the vertical guide roller 13, the foreign matter (lubricating oil, etc.) that has fallen on the sealing plate is unfixed end side of the sealing plate. There is a risk of entering the inside of the bearing from the non-contact seal portion formed on the surface.

  In the transverse stretching apparatus 10 of FIG. 7, the vertical guide roller 13 is configured by the above-described rolling bearing 1 of the present invention, so that it falls onto the upper sealing plate 6 (not shown in FIG. 7). The foreign matter moves at least in a direction away from the non-contact seal portion, and thereby the foreign matter is effectively prevented from entering the bearing.

  In the case where the above-described recess 8 is provided on the side surface of the outer ring 2 or the above-described notch 9 is provided in the outer side in the axial direction of the outer diameter side end of the sealing plate 6, the centrifugal force accompanying the rotation of the sealing plate 6 is increased. The foreign matter on the sealing plate 6 is forcibly discharged by the force, and the effect of preventing the foreign matter from entering the bearing is exhibited more remarkably.

  The rolling bearing of the present invention is a device other than a lateral stretching device of a film stretching machine, for example, a horizontally long guide rail, a guided member guided by the guide rail, and a vertical orientation supported by the guided member. A movable guide device such as a movable body having a fixed shaft arranged and a guide roller supported by the fixed shaft can be preferably used as the guide roller, and an excellent effect can be expected even in such a case. .

1, 1A, 1 'rolling bearing 2 outer ring 2a raceway surface 2b shoulder groove 3 inner ring 3a raceway surface 3b shoulder groove 4 cage 5 rolling element 6, 6' sealing plate 6a winding part 6b skirt part 6c outer wall 6d Skirt part 6e Flat part V Apex of outer wall slope 7 Space 8 between outer ring and inner ring Recess 9 Cut 10 Film stretcher lateral stretcher 11 Tenter clip 12 Grip 13 Vertical axis guide roller 14 Horizontal axis guide roller 15 Vertical axis 16 Horizontal axis 20 Guide rail 20a First guide surface 20b Second guide surface F Film

Claims (8)

A metal sealing plate (6) is fixed to either the outer ring (2) or the inner ring (3), the non-fixed end of the sealing plate (6) is made to face the other race ring, and the sealing plate ( 6) a rolling bearing in which the entrance of the space (7) formed between the outer ring (2) and the inner ring (3) is sealed;
A rolling bearing in which the non-fixed end side of the sealing plate (6) is inclined in a direction to be displaced outward in the axial direction of the bearing as it is separated from the fixed side of the sealing plate (6).   2. The rolling bearing according to claim 1, wherein the sealing plate has a substantially entire outer wall inclined in the same direction from the non-fixed end side to the fixed end side.   2. The rolling bearing according to claim 1, wherein the sealing plate (6) has an outer wall (6 c) inclined halfway in the radial direction, and the remaining portion is not inclined. 3.   The rolling bearing according to claim 1, wherein a fixed end side of the outer wall (6c) of the sealing plate (6) is inclined in a direction opposite to the non-fixed end side.   The rolling bearing according to any one of claims 1 to 4, wherein the bearing ring for fixing the sealing plate (6) includes, on a side surface, a concave portion (8) extending in a radial direction from the inner diameter surface to the outer diameter surface.   The sealing plate (6) has a cut (9) at the fixed side end to cut off the axially outer side portion of the fixed side end in the circumferential direction, and the cut (9) corresponds to the recess (8). The rolling bearing according to claim 5, wherein the rolling bearing is disposed at a position where the   The guide roller having a horizontally long guide rail, a guided member guided by the guide rail, a vertically arranged fixed shaft supported by the guided member, and a guide roller supported by the fixed shaft Is constituted by a rolling bearing provided with an inner ring fitted on the fixed shaft, an outer ring rolling on the guide rail, and a rolling element disposed between the inner and outer rings, and the rolling bearing is claimed in claim 1. The movement guide apparatus which is a rolling bearing in any one of -6.   It has a horizontally long guide rail (20) and a tenter clip (11) as a guided member guided by the guide rail (20), and the tenter clip (11) is vertically connected to the tenter clip (11). It has a vertical axis (15) fixed in an orientation and a vertical guide roller (13) supported by the vertical axis (15), and the vertical guide roller (13) is the vertical axis (15). ), An inner ring (3) fitted on the outer periphery, an outer ring (2) rolling on the guide rail (20), and a rolling bearing having a rolling element (5) disposed between the inner and outer rings, The transverse stretching apparatus of the film stretching machine whose rolling bearing is the rolling bearing in any one of Claims 1-6.

Images