JP6275433B2 - Solid lubricated rolling bearing - Google Patents

Description

  The present invention relates to a solid lubricated rolling bearing using a solid lubricant.

  The above-mentioned solid lubricated rolling bearing is suitable for use in a high temperature atmosphere or a vacuum atmosphere where grease or lubricating oil cannot be used as a lubricant, for example, as a bearing for a tenter clip of a film stretching machine.

  The film stretching machine here is used to produce a stretched film used for general packaging materials, liquid crystal panels, or secondary batteries, and in order to improve the strength of the film, as shown in FIG. It is a mechanical device that continuously conveys the film 100 in the longitudinal direction (arrow X direction) and stretches the film 100 in the width direction while heating the film 100 in the region indicated by the broken line (may be further stretched in the longitudinal direction). The tenter clip is a mechanical part that clips both ends of the film and stretches the film in a predetermined direction while being circulated and running as indicated by an arrow C in the drawing in this film stretching machine. The tenter clip bearing is used in a portion that guides the rail travel of the tenter clip, and is used in a high temperature environment (250 ° C. or higher, about 400 ° C. at the maximum). Therefore, a solid lubricated rolling bearing is used. There is a need.

  Conventionally known as such a solid-lubricated rolling bearing is one in which a separator made of a solid lubricant is disposed between adjacent rolling elements without using a cage (Patent Document 1, Patent Document 2). . In addition, a solid lubricated rolling bearing is also known (Patent Document 3) in which a separator and rolling elements are held by a cage that needs riveting.

Japanese Patent No. 3934277 JP 2012-67884 A Japanese Patent No. 3550689

  During the use of the solid lubricated rolling bearing, the separator made of the solid lubricant is worn or chipped by contact with the rolling elements, and the size of the separator is gradually reduced. Therefore, in the configurations of Patent Document 1 and Patent Document 2 that do not have a cage, when the separator becomes small due to long-term use, the rolling elements may be unevenly distributed in a partial region in the circumferential direction. In particular, when all the rolling elements move within a 180 ° region in the circumferential direction, the inner ring and the outer ring are separated by a slight external force, and the bearing becomes unintentionally disassembled and cannot function as a bearing. On the other hand, in the configuration of Patent Document 3, since the distance between the adjacent rolling elements is maintained by the cage, the above problem can be avoided. However, in the initial stage where the separator is not worn, between the rolling element and the cage. Therefore, the wear powder of the separator is easily filled in the gap between the pocket surface of the cage and the rolling elements. For this reason, the rolling motion and revolution motion of the rolling elements are hindered, and there is a possibility of reaching rotation lock.

  Therefore, an object of the present invention is to provide a solid lubricated rolling bearing capable of stably preventing a rotation lock and unintended disassembly of the bearing for a long period of time.

  A solid lubricated rolling bearing according to the present invention includes an outer ring having an outer raceway surface, an inner ring having an inner raceway surface, a plurality of rolling elements disposed between the outer raceway surface and the inner raceway surface, and an adjacent rolling element. Is a solid-lubricated rolling bearing in which the separator is formed of a solid lubricant, and the relative movement of the adjacent rolling elements and the separator in the circumferential direction is regulated by a regulating member. The restriction member is arranged at a plurality of locations in the circumferential direction to allow relative movement between adjacent restriction members.

  In such a configuration, the moving range in the circumferential direction of each rolling element is regulated by the regulating member. Therefore, even if the separator wears down due to the operation of the bearing and the size is reduced, it is possible to prevent a situation in which all the rolling elements are unevenly distributed in a partial region in the circumferential direction. Therefore, the outer ring and the inner ring are not separated even after long-term operation, and the situation where the bearing is unintentionally disassembled can be prevented.

  In addition, since each regulating member can be relatively moved independently, the size of the gap between the rolling element and the inner surface of the regulating member can be flexibly changed. Therefore, the discharge of the solid lubricant powder accumulated in the gap can be promoted, and the situation where the gap is filled with the solid lubricant powder and becomes a rotation lock can be prevented. Further, since the regulating members are not connected by a connecting member such as a rivet, it is not necessary to secure an installation space for the connecting member in the circumferential direction in the bearing. Therefore, many rolling elements can be incorporated in the bearing, and the basic load rating of the bearing can be increased. Furthermore, since the connecting work between the regulating members is unnecessary, the number of work steps during the assembly of the bearing can be reduced.

  In order to obtain the above effects, it is preferable that each restricting member is provided with a base portion extending in the circumferential direction between the outer ring and the inner ring, and a restricting portion extending from the base portion to a space between the inner raceway surface and the outer raceway surface.

  If each inner side surface of the base portion and the restricting portion is formed in a flat surface shape having no curvature, the discharge of the solid lubricant from the gap can be further promoted.

  By disposing a seal member that seals the space between the inner and outer rings on the outer side in the axial direction of the base portion of the restricting member, it is possible to prevent the restricting member from falling off with the seal member.

  By causing the outer diameter end and inner diameter end of the base portion to be close to the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring, the generated solid lubricant powder can be retained near the raceway surface at the base portion. Therefore, the leakage of the solid lubricant powder to the outside of the bearing can be suppressed.

  A pair of restricting members are arranged on both sides of the rolling element and the separator in the axial direction, and the pair of restricting members and the rolling element and separator accommodated in the pair are used as one unit, and the unit is arranged in the circumferential direction. By disposing at a plurality of locations and allowing relative movement between the units, it is possible to more reliably prevent the solid lubricant powder from leaking out of the bearing.

  If each regulating member has the same shape, the processing cost of the regulating member can be reduced, and the cost of the solid lubricated rolling bearing can be reduced.

  The solid lubricated rolling bearing described above is particularly suitable as a bearing for a tenter clip of a film stretching machine.

  According to the solid-lubricated rolling bearing according to the present invention, it is possible to stably prevent rotation lock and unintended disassembly of the bearing for a long period of time.

It is a perspective view which shows schematic structure of a tenter clip. It is sectional drawing of the solid lubrication rolling bearing concerning this invention. FIG. 3 is a front view of a solid-lubricated rolling bearing as viewed from the direction A in FIG. 2. FIG. 3 is a developed view of the solid lubricated rolling bearing of FIG. 2 as viewed from the outer diameter side, with the outer ring removed. It is a perspective view which shows a control member. It is sectional drawing of the solid lubrication rolling bearing concerning this invention. It is a front view of the solid lubrication rolling bearing seen from the A direction in FIG. FIG. 7 is a development view of the solid lubricated rolling bearing of FIG. 6 as viewed from the outer diameter side, with the outer ring removed. It is a figure which shows the other structural example of a separator, (a) is the front view seen from the axial direction, (b) is the top view seen from the radial direction. It is a top view which shows schematic structure of a film extending machine.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  FIG. 1 shows a schematic structure of a tenter clip of a film stretching machine to which a solid lubricated rolling bearing according to the present invention is applied. As described above, the tenter clip moves while being guided by the guide rail 1 of the endless track, and is rotatable on the frame 2, the clip portion 3 that holds the film 100 (see FIG. 10), and the frame 2. And a plurality of supported bearings 4. The tenter clip travels by being driven by a chain or the like (not shown). At that time, the outer peripheral surface of each bearing 4 rolls on the guide rail 1, whereby the moving direction of the tenter clip is guided by the guide rail 1, and the film sandwiched between the clip portions 3 is stretched. Another ring-shaped member fitted and fixed to the outer peripheral surface of the bearing outer ring may be rolled on the guide frame 1.

  2 is a cross-sectional view showing a first embodiment of a solid lubricated rolling bearing 4 for a tenter clip, and FIG. 3 is a front view of the bearing 4 of FIG. 2 viewed from the direction A (however, the right shield plate 9 in FIG. Represents the removed state). The bearing 4 has a form as a deep groove ball bearing, and has an outer ring 5 having an outer raceway surface 5a on an inner peripheral surface, an inner ring 6 having an inner raceway surface 6a on an outer peripheral surface, an outer raceway surface 5a and an inner raceway surface 6a. A plurality (six in this embodiment) of rolling elements 7, for example, a ball, and a plurality (three in this embodiment) of separators 8 arranged between the adjacent rolling elements 7, A seal member 9 that seals the space between the outer ring 5 and the inner ring 6 on both sides in the axial direction is a main component. In the bearing 4 of this embodiment, the outer peripheral surface 5b of the outer ring 5 is a rolling surface that rolls on the guide rail 1 shown in FIG. 1, and the inner peripheral surface 6b of the inner ring 6 is fitted to the fixed shaft 2a provided on the frame 2. Fixed.

  The seal member 9 is formed of a shield plate, for example. The shield plate 9 has an outer diameter end that is press-fitted into a circumferential groove formed on the inner peripheral surface of the outer ring 5, and an inner diameter end that is close to the outer peripheral surface of the inner ring 6 to form a non-contact seal. In a bearing that is not used in a high temperature environment, a contact seal type in which the inner diameter end of the seal member 9 is in sliding contact with the outer peripheral surface of the inner ring 6 can also be used.

  The outer ring 5, the inner ring 6, and the rolling element 7 are made of a steel material, for example, martensitic stainless steel such as SUS440C. The rolling element may be formed of ceramics. In this case, for example, silicon nitride can be used as the ceramics. When the rolling element 7 is not formed of ceramics, it is preferable to form a film made of a solid lubricating material such as graphite on the surface thereof. The shield plate 9 is preferably made of a steel material, for example, austenitic stainless steel such as SUS304, which has excellent corrosion resistance.

  The separator 8 is formed of a solid lubricant. The composition of the solid lubricant is arbitrary, for example, solid materials such as layered materials such as graphite, molybdenum disulfide, tungsten disulfide, soft metals such as gold, silver and lead, and polymer resin compositions such as PTFE and polyimide, Alternatively, a composite material mainly composed of these solid lubricating materials can be used as the separator 8. For example, the separator 8 can be formed by molding and firing graphite powder, or by molding and firing a powder containing graphite as a main component together with a binder.

  Although the shape of the separator 8 is arbitrary, in this embodiment, the separator 8 formed as a partial cylinder as a whole is illustrated. The thickness of the separator 8 in the radial direction is such that the radial dimension of the inner peripheral surface of the outer ring 5 (shoulder surface 5c adjacent to the outer raceway surface 5a) and the outer peripheral surface of the inner ring 6 (shoulder surface 6c adjacent to the inner raceway surface 6a). It is slightly smaller than the difference from the radial dimension. The axial dimension of the separator 8 is larger than the axial dimension of the outer raceway surface 5a and the inner raceway surface 6a. Therefore, both end portions in the axial direction of the separator 8 can be in sliding contact with the shoulder surfaces 5c and 6c of the outer ring 5 and the inner ring 6 during rotation of the bearing.

  In FIG. 3, the inner peripheral surface 8 a of the separator 8 (the surface facing the outer peripheral surface of the inner ring 6) and the outer peripheral surface 8 b (the surface facing the inner peripheral surface of the outer ring 5) are both cylindrical surfaces centered on the axis. However, as shown in FIG. 9, a flat surface 8 c may be formed in the central region in the circumferential direction of the outer peripheral surface 8 b of the separator 8.

  The solid-lubricated rolling bearing 4 further includes, as a main component, a regulating member 10 that holds the adjacent rolling elements 7 and separators 8 from both sides in the circumferential direction and regulates the relative movement in the direction away from both circumferential directions. ing. Hereinafter, the configuration of the restricting member 10 will be described in detail with reference to FIGS. 4 and 5. Here, FIG. 4 is a developed view of the solid lubricated rolling bearing 4 of FIG. 2 as viewed from the outer diameter side, with the outer ring 5 removed, and FIG. 5 is a perspective view of the regulating member 10.

  As shown in FIGS. 4 and 5, the regulating member 10 includes a base portion 10a extending in the circumferential direction between the outer ring 5 and the inner ring 6, and a direction (axial direction) orthogonal to the surface of the base portion 10a from both circumferential ends of the base portion 10a. ) And a restricting portion 10b extending integrally. Inner side surfaces 10a1 and 10b1 of the base portion 10a and the regulating portion 10 facing the rolling elements 7 and the separator 8 are both formed as flat surfaces having no curvature. As shown in FIG. 4, the axial length L of the restricting portion 10b is slightly larger than the diameter dimension Db of the rolling element 7 and the axial dimension P of the separator 8 (L> Db, L> P).

  The regulating member 10 has a thickness of about 0.1 mm to 1.0 mm (in FIGS. 2 to 4, the thickness of the regulating member 10 is exaggerated for ease of understanding). For example, a metal thin plate is pressed. It can be manufactured by processing. The material of the regulating member 10 can be arbitrarily selected, and is made of an iron-based material such as stainless steel, or is subjected to a surface treatment such as chrome plating to ensure corrosion resistance using the iron-based material as a base material. Can be used. In addition, the regulating member 10 may be formed of the above-described solid lubricant.

  As shown in FIGS. 2 and 3, the base portion 10 a of the restricting member 10 is disposed between the inner peripheral surface of the outer ring 5 and the outer peripheral surface of the inner ring 6, and the restricting portion 10 b includes the outer raceway surface 5 a of the outer ring 5 and the inner ring. 6 in the space between the inner raceway surface 6a. In other words, the restricting portion 10b is disposed so as to intersect with the revolution trajectory of the rolling element 7. Between the two restricting portions 10b of the restricting member 10, at least one rolling element 7 and at least one separator 8 are arranged. In this embodiment, the case where the two rolling elements 7 are arrange | positioned between the two control parts 10b of the control member 10, and the one separator 8 is arrange | positioned between the two rolling elements 7 is illustrated. The circumferential dimension between the two regulating portions 10b of the regulating member 10 is set so that the rolling elements 7 and the separators 8 accommodated therebetween can be slightly moved in the circumferential direction.

  The regulating member 10 described above is arranged at a plurality of locations (preferably at least three locations) in the circumferential direction as shown in FIGS. 3 and 4. At this time, all the regulating members 10 have the same shape. Neither the rolling element 7 nor the separator 8 is disposed between the restricting portions 10b of the adjacent restricting members 10, and the restricting portions 10b face each other in the circumferential direction. Accordingly, all the rolling elements 7 and the separators 8 are disposed between the restricting portions 10b of any of the restricting members 10. Adjacent regulating members 10 are not connected to each other, and there is a minute circumferential gap α between the regulating portions 10b of the neighboring regulating members 10 facing each other as shown in FIG.

  The radial dimension of the regulating member 10 is slightly smaller than the difference between the radial dimension of the shoulder surface 5c of the outer ring 5 and the radial dimension of the shoulder surface 6c of the inner ring 6, and the outer diameter end and the inner diameter end of the base 10a are respectively the outer ring 5 and the outer ring 5. The inner peripheral surface (shoulder surface 5c) of the inner ring 6 and the outer peripheral surface (shoulder surface 6c) of the inner ring 6 are close to each other. In the present embodiment, the gap between the inner diameter end of the base portion 10 a and the shoulder surface 6 c of the inner ring 6 is made smaller than the gap between the outer diameter end of the base portion 10 a and the shoulder surface 5 c of the outer ring 5. The minute gap α between the adjacent regulating members 10 can be determined such that the inner diameter end of the base portion 10a is not in contact with the outer circumferential surface (shoulder surface 6c) of the inner ring 6, but if there is no particular problem, the rotation of the regulating member 10 It may be determined that the inner diameter end of the base portion 10a and the outer peripheral surface (shoulder surface 6c) of the inner ring 6 are in temporary contact with each other. In FIG. 2, since the base 10a is thick, the outer diameter end of the base 10a is in contact with the shield plate 9 and is not in contact with the inner peripheral surface (shoulder surface 5c) of the outer ring 5. By making the base portion 10 a thin, the outer diameter end of the base portion 10 a can be brought into contact with the inner peripheral surface of the outer ring 5.

  The regulating member 10 is assembled between the outer ring 5 and the inner ring 6 in the same direction so that the base portion 10a is disposed on one axial side of the bearing. The restriction member 10 can be incorporated before the rolling element 7 and the separator 8 are incorporated between the outer ring 5 and the inner ring 6 and at any stage after these are incorporated. After the assembly of the rolling elements 7, the separator 8, and the regulating member 10, the shield plate 9 is press-fitted and fixed in the circumferential groove of the outer ring 5 to complete the solid lubricated rolling bearing 4 shown in FIG. In this state, the regulating member 10 is restrained from the outside in the axial direction by the seal member 9, so that the regulating member 10 does not fall off the bearing 4. In order to restrict the movement of the regulating member 10 to the opening side (right side in FIG. 2), a ring-shaped member is attached to the outer ring 5 (or the inner ring 6), and this member is attached to the right shield plate 9 and the regulating portion 10a. It may be arranged between the front end of the restricting portion 10a and the front end of the restricting portion 10a.

  In the solid lubricated rolling bearing 4 having such a configuration, during rotation of the bearing, the separator 8 is scraped off by contact between the rotating and revolving rolling element 7 and the separator 8, and solid lubricant powder (including small pieces of solid lubricant) is obtained. Occurs. The solid lubricant powder is transferred to the outer raceway surface 5a, the inner raceway surface 6a, and the like, so that the bearing 4 can be stably lubricated even in an environment where there is no lubricating oil or grease.

  The separator 8 gradually wears and becomes smaller in size due to the operation of the bearing, but even in that case, since the range of movement of each rolling element 7 in the circumferential direction is regulated by the regulating member 10, all the rolling elements 7 are circular. It is possible to prevent a situation in which it is unevenly distributed in a partial region in the circumferential direction. Therefore, the outer ring 5 and the inner ring 6 are not separated even after long-term operation, and the situation where the bearing is unintentionally disassembled can be prevented. In particular, if three or more restricting members 10 are used as in the present embodiment, it is theoretically impossible for all the rolling elements 7 to move to an area within 180 °. Can be prevented.

  Moreover, from the said structure, each control member 10 becomes relatively movable mutually independently in every direction (an axial direction, a circumferential direction, and a radial direction). Accordingly, the size of the gap between the rolling element 7 and the inner side surfaces 10a1 and 10b1 of the regulating member 10 can be flexibly changed even in the initial stage (a state in which the wear of the separator 8 is not progressing). Therefore, the discharge of the solid lubricant powder accumulated in the gap is promoted, and the situation where the gap is filled with the solid lubricant powder and becomes a rotation lock can be prevented. The effect of promoting the discharge from the gap between the solid lubricant powders is further promoted by forming the inner side surfaces 10a1 and 10b1 of the base portion 10a and the regulating portion 10b into a flat surface shape having no curvature.

  Further, since a connecting member such as a rivet used in the bearing of Patent Document 3 described above is not necessary, it is not necessary to secure an installation space for the connecting member in the circumferential direction. Therefore, many rolling elements 7 can be incorporated in the bearing, and the basic load rating of the bearing can be increased. Furthermore, since the connecting work between the regulating members 10 is not required, the number of work steps during the assembly of the bearing can be reduced, and the cost can be reduced.

  Further, since the outer diameter end and the inner diameter end of the base portion 10a of the regulating member 10 are close to the inner peripheral surface of the outer ring 5 and the outer peripheral surface of the inner ring 6, the solid lubricant powder generated by the contact between the rolling elements 7 and the separator 8 Can be shielded by the base 10a and can be kept near the raceway surfaces 5a and 6a. Therefore, leakage of the solid lubricant powder to the outside of the bearing (particularly leakage to the left in FIG. 2) can be reliably prevented.

  Moreover, since each control member 10 is made into the same shape, the processing cost of the control member 10 can be reduced and the further cost reduction of the solid-lubrication rolling bearing 4 is achieved.

Next, a second embodiment of the solid lubricated rolling bearing according to the present invention will be described with reference to FIGS.
In the second embodiment, a pair of regulating members 10 and 10 ′ having the same shape are disposed on both sides of the rolling element 7 and the separator 8 in the axial direction. The detailed configuration of this embodiment will be described below. In addition, in 2nd embodiment, each part of the regulating member 10 'on the other side in the axial direction among the regulating members 10 and 10' making a pair is a common reference to the corresponding part of the regulating member 10 on the one side in the axial direction. It is shown in a form with (') added to the reference sign.

  In the second embodiment, the base portions 10a and 10a 'of the pair of regulating members 10 and 10' are opposed in the axial direction, and the regulating portions 10b and 10b 'are opposed in the circumferential direction. The pair of regulating members 10 and 10 'are in a non-connected state. Inner side surfaces 10a1, 10a1 'of both base portions 10a, 10a', inner side surface 10b1 of the restricting portion 10b of the restricting member 10 on one axial side, and inner surface of the restricting portion 10b 'of the restricting member 10' on the other axial side The same number of rolling elements 7 and separators 8 as in the first embodiment are accommodated in the space surrounded by 10b1 ′. The length L in the axial direction of the restricting portions 10b and 10b ′ (the opposing base portions 10a and 10a) so that the tips of the restricting portions 10b and 10b ′ can come into contact with the base portions 10a ′ and 10a of the opposing counterpart restricting members. The minimum distance in the axial direction between the inner side surfaces 10a1 and 10a1 'is slightly larger than the diameter dimension Db of the rolling element 7 and the axial dimension P of the separator 8 (L> Db, L> P).

  In the bearing 4 of this embodiment, a unit composed of the pair of regulating members 10 and 10 ', the rolling elements 7 and the separator 8 described above is formed as a set, and the unit having the same configuration is provided at a plurality of locations in the circumferential direction (see FIG. In the example shown, it is arranged at three locations). Similar to the first embodiment, a minute gap α in the circumferential direction is formed between units adjacent in the circumferential direction. The configuration of each part other than those described above is basically the same as that of the first embodiment.

  Even in the configuration of the second embodiment, the same effect as that of the first embodiment can be obtained. Further, the dropout of the restricting members 10, 10 'is restricted by the shield plates 9 on both sides in the axial direction. Particularly in the case of the configuration of the second embodiment, since the base portions 10a and 10a ′ are arranged on both sides in the axial direction of the rolling elements 7 and the separator 8, the leakage of the solid lubricant powder to both sides in the axial direction is suppressed. It is possible to more reliably prevent the solid lubricant from leaking out of the bearing. In addition, although the case where the restricting portions 10b and 10b 'of the pair of restricting members 10 and 10' are loosely fitted is illustrated, the above units can be integrated by tightly fitting both. .

  The present invention is not limited to the configuration of each embodiment described above. For example, although the case where the present invention is applied to a deep groove ball bearing as an example of a bearing is illustrated, the present invention can also be applied to other types of bearings including angular ball bearings, cylindrical roller bearings, and tapered roller bearings. In each embodiment, the inner ring rotating bearing 4 is illustrated, but the present invention can also be applied to an outer ring rotating bearing.

  In addition, the application of the solid lubricated rolling bearing according to the present invention is exemplified for a tenter clip of a film stretching machine, but the application is not limited to this, and grease or lubricating oil cannot be used as a lubricant, a high temperature atmosphere It can be widely applied to bearings used in a vacuum atmosphere.

  Furthermore, the arrangement of the rolling elements 7 and the separators 8 in the circumferential direction is also arbitrary, and as described in the first and second embodiments, a plurality of (for example, two) rolling elements are adjacent to each other as a set. In addition to disposing one separator 8 between two rolling element groups, the present invention can also be applied to the case where the rolling elements 7 and the separator 8 are alternately arranged in the circumferential direction. Further, the number of rolling elements 7 and separators 8 arranged between two restricting portions of one restricting member is also arbitrary.

DESCRIPTION OF SYMBOLS 1 Guide rail 2 Frame 3 Clip part 4 Solid lubricated rolling bearing 5 Outer ring 5a Outer raceway surface 6 Inner ring 6a Inner raceway surface 7 Rolling element (ball)
8 Separator 9 Sealing member (shield plate)
10, 10 'Restricting members 10a, 10a' Base portions 10a1, 10a1 'Inner side surfaces 10b, 10b' Restricting portions 10b1, 10b1 'Inner side surfaces

Claims (8)

An outer ring having an outer raceway surface, an inner ring having an inner raceway surface, a plurality of rolling elements disposed between the outer raceway surface and the inner raceway surface, and a separator disposed between adjacent rolling elements, A solid-lubricated rolling bearing in which the separator is formed of a solid lubricant,
A rolling member housed in the regulating member and the regulating member, comprising a regulating member that accommodates the neighboring rolling element and the separator and restricts relative movement of the adjacent rolling element and the separator in a circumferential direction. and as a single unit and a separator, disposed the unit in the circumferential direction of the plurality of locations, the solid lubricating rolling bearing, characterized in that permit relative movement between adjacent units.   2. The solid lubricated rolling bearing according to claim 1, wherein each regulating member includes a base portion extending in a circumferential direction between the outer ring and the inner ring, and a regulating portion extending from the base portion to a space between the inner raceway surface and the outer raceway surface.   The solid lubricated rolling bearing according to claim 2, wherein each inner side surface of the base portion and the regulating portion is formed into a flat surface shape having no curvature.   The solid lubricated rolling bearing according to claim 2, wherein a seal member that seals a space between the inner and outer rings is disposed outside the base portion of the restriction member in the axial direction.   The solid lubricated rolling bearing according to claim 2, wherein the outer diameter end and the inner diameter end of the base portion are close to the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring. The rolling elements and the regulating member forming the axial sides a pair of separators arranged, the regulating member having the pair as a unit and the rolling elements and separators contained therein, circumferentially the unit The solid-lubricated rolling bearing according to claim 1, wherein the solid-lubricated rolling bearing is arranged at a plurality of locations and allows relative movement between the units.   The solid lubricated rolling bearing according to claim 1 or 6, wherein each regulating member has the same shape.   The solid lubricated rolling bearing according to claim 1, which is used for a tenter clip of a film stretching machine.

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