Roller bearing

Abstract

To provide a roller bearing capable of improving assemblability.SOLUTION: A retainer 2 of a roller bearing 1 has: a cylindrical retainer body 4 having a guide face guided to a peripheral face of a mating side member; and a cylindrical member 5 positioned on the inner diameter side of the retainer body 4 and concentrically arranged on the retainer body 4. The retainer body 4 and the cylindrical member 5 satisfy following relationships: B>A and B / 2-C>A / 2, E>D and E / 2-F>D / 2. A: an inner diameter of a column part between pockets of the retainer body 4. B: a circumscription circle diameter of the roller 3 when the roller 3 is in contact with the column parts adjacent to each other in the circumferential direction of the cylindrical member 5. C: an axial core misalignment volume of the cylindrical member 5 and the retainer body 4. D: an inscription circle diameter of the roller 3 when the roller 3 is in contact with the column parts adjacent to each other in a circumferential direction of the retainer body 4. E: an outside diameter of the cylindrical member 5. F: an axial core misalignment volume of the cylindrical member 5 and the retainer body 4.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a roller bearing used, for example, in industrial machines, automobiles, etc.

Background Art

[0002] Conventionally, a needled roller bearing with a cage has been proposed, which is basically composed of two parts, an outer member and an inner member, for the cage (Patent Document 1). Since this needled roller bearing with a cage has the cage as two parts, an outer member and an inner member, a large load capacity can be obtained, and the functions of preventing the rollers from coming out to the outside and preventing the rollers from coming out to the inside can be obtained.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional technology, the dimensional relationship regarding the outer member and the inner member is not mentioned, and there remains room for improving the assemblability of the bearing.

[0005] An object of the present invention is to provide a roller bearing capable of improving assemblability.

Means for Solving the Problems

[0006] The roller bearing of the present invention is a roller bearing including a cage and a plurality of rollers held by the cage, the cage has a cylindrical cage body having a surface facing the circumferential surface of the mating member in which the roller bearing is incorporated with a radial clearance, and a cylindrical member located on the inner diameter side or the outer diameter side of the cage body and arranged concentrically with the cage body. The cage body has column portions extending in the axial direction at a plurality of locations in the circumferential direction, and the cylindrical member has column portions extending in the axial direction at a plurality of locations in the circumferential direction. Pockets of the cage body formed by spaces between adjacent column portions in the circumferential direction, and pockets of the cylindrical member formed by spaces between adjacent column portions in the circumferential direction are provided at a plurality of locations in the circumferential direction, and the rollers are accommodated across the pockets of the cage body and the cylindrical member. The cage body and the cylindrical member are roller bearings that satisfy the following relationships. B > A and B / 2 - C > A / 2 E > D and E / 2 - F > D / 2 However, (1) when the cylindrical member is located on the inner diameter side of the cage body, A: Inner diameter of the column portion between pockets in the cage body B: Outer circumscribed circle diameter of the roller when the roller is in contact with adjacent column portions in the circumferential direction of the cylindrical member C: Amount of axial misalignment between the cylindrical member and the cage body D: Inner inscribed circle diameter of the roller when the roller is in contact with adjacent column portions in the circumferential direction of the cage body E: Outer diameter of the cylindrical member F: Amount of axial misalignment between the cylindrical member and the cage body (2) When the cylindrical member is located on the outer diameter side of the cage body, A: Inner diameter of the cylindrical member B: Outer circumscribed circle diameter of the roller when the roller is in contact with adjacent column portions in the circumferential direction of the cage body C: Amount of axial misalignment between the cylindrical member and the cage body D: Inner inscribed circle diameter of the roller when the roller is in contact with adjacent column portions in the circumferential direction of the cylindrical member E: Outer diameter of the column portion between pockets in the cage body F: Amount of axial misalignment between the cylindrical member and the cage body

[0007] According to this configuration, for example, when the cylindrical member is located on the inner diameter side of the cage body, by setting B > A, when assembling the roller bearing into a machine in use or the like, it is possible to prevent the rollers from undesirably entering the inner surface of the column portion in the cage body or the outer surface of the cylindrical member. However, in the state of the roller bearing, since the axial centers of the cylindrical member and the cage body may be displaced, it is necessary to consider the amount of axial displacement C between the cylindrical member and the cage body. According to this configuration, even if there is an amount of axial displacement between the cylindrical member and the cage body, by setting B / 2 - C > A / 2, it is possible to prevent in advance the assembly defect that the rollers enter the inner surface of the column portion or the outer surface of the cylindrical member.

[0008] Also, by setting E > D, when assembling the roller bearing into a machine in use or the like, it is possible to prevent the rollers from undesirably entering the outer surface of the cylindrical member or the inner surface of the column portion in the cage body. Even if there is an amount of axial displacement between the cylindrical member and the cage body, by setting E / 2 - F > D / 2, it is possible to prevent in advance the assembly defect that the rollers enter the outer surface of the cylindrical member or the inner surface of the column portion in the cage body. The same effect as described above is exhibited even when the cylindrical member is located on the outer diameter side of the cage body. Therefore, when assembling the roller bearing into a machine in use or the like, the rollers can be smoothly inserted into the mating shaft or the portion corresponding to the outer ring raceway surface, and the assemblability can be improved.

[0009] The circumferential clearance of the cylindrical member, which is the amount of movement of the roller in the circumferential direction with respect to the pocket of the cylindrical member, and the circumferential clearance of the cage body, which is the amount of movement of the roller in the circumferential direction with respect to the pocket of the cage body, may satisfy the following relationship. Circumferential clearance of the cylindrical member > Circumferential clearance of the cage body Since the space of the cylindrical member is narrow, it is difficult to secure the cross-sectional area of the column portion and the strength is lower than that of the cage body. Therefore, by setting the circumferential clearance of the cylindrical member > the circumferential clearance of the cage body, the load applied to the cylindrical member can be reduced compared to the load applied to the cage body. As a result, it becomes possible to ensure the strength of the entire cage.

[0010] The width of the cage body may be larger than the width of the cylindrical member. In this case, even if the roller bearing may be used under conditions where an induced thrust load is generated, it is possible to receive the induced thrust load with a cage body having higher strength than the cylindrical member.

[0011] The pocket width in the circumferential direction of the cage body may be 93% or more and less than 99% of the roller diameter. The pocket width of the cage body is set to a width that satisfies a predetermined circumferential clearance. However, if the pocket width is less than 93% of the roller diameter, abnormal conditions may occur on the surface of the roller when the roller is incorporated, and it cannot be smoothly press-fitted. If the pocket width is 99% or more of the roller diameter, the roller may fall off during transportation. According to this configuration, since the pocket width of the cage body is 93% or more and less than 99% of the roller diameter, the roller can be smoothly press-fitted when incorporated into the cage body and the roller can be prevented from falling off during transportation.

[0012] The pocket width in the circumferential direction of the cylindrical member may be 93% or more and less than 99% of the roller diameter. In this case, the roller can be smoothly press-fitted when incorporated into the cylindrical member and the roller can be prevented from falling off during transportation.

[0013] The cage body may have an annular portion including the column portion and flange portions extending from both axial ends of the annular portion toward the inner diameter side or the outer diameter side. In this case, by forming flange portions that bend both axial ends of the annular portion toward the inner diameter side or the outer diameter side, the structure can be simplified and the manufacturing cost can be reduced.

Effect of the Invention

[0014] The roller bearing of the present invention defines the dimensions of the cage body and the cylindrical member while taking into account the amount of axial misalignment between the cylindrical member and the cage body in a roller bearing that houses rollers over the pockets of the cage body and the cylindrical member. Therefore, the assemblability of the roller bearing can be improved.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0016] [First Embodiment] The roller bearing according to the embodiment of the present invention will be described with reference to FIGS. 1 to 10. This roller bearing is used, for example, in applications such as industrial machines and vehicles. <Overall Configuration of Roller Bearing> As shown in FIG. 1, the roller bearing 1 includes a cage 2 and a plurality of rollers 3 held by the cage 2. As shown in FIG. 2, the cage 2 has a cage body 4 and a cylindrical member 5 located on the inner diameter side of the cage body 4 and arranged concentrically with the cage body 4. The roller bearing 1 is a roller bearing with a cage in which the rollers 3 directly roll on the outer peripheral surface of the shaft 6 and the inner peripheral surface of the housing (opposite member) 7.

[0017] The roller bearing with a cage is also referred to as a "roller with a cage". The roller 3 is made of, for example, bearing steel or the like and is, for example, a needle roller. However, the roller 3 may be a cylindrical roller. In this specification, the roller bearing may sometimes be simply referred to as a bearing. In this specification, the "axial direction" refers to the direction along the axis AX of the roller bearing 1 or a direction parallel to the axis AX. The "radial direction" refers to a direction orthogonal to the straight line forming the "axial direction".

[0018] <Cage> As shown in FIG. 3, the cage body 4 has a cylindrical shape having a surface (guide surface) 4a that faces (via a radial clearance) the inner peripheral surface 7a of the housing 7, which is the mating member. This guide surface 4a faces or contacts the inner peripheral surface 7a of the housing 7 with a slight radial clearance. The mating member, the housing 7, is the object into which the roller bearing 1 (FIG. 1) is incorporated. As shown in FIG. 2, the cage body 4 has an annular portion 8 having a diameter larger than the diameter of the pitch circle PCD of the roller arrangement, and flange portions 9 extending from both axial ends of the annular portion 8 toward the inner diameter side. The cage body 4 is, for example, a press-worked product obtained by drawing or the like of a metal plate such as a steel plate.

[0019] The cylindrical member 5 is formed in an annular shape having a diameter smaller than the diameter of the pitch circle PCD. The cylindrical member 5 is formed in an annular shape, for example, by rolling a strip such as a steel plate and welding both ends. The pockets described later are processed before rolling the strip.

[0020] The annular portion 8 of the cage body 4 and the cylindrical member 5 are cylindrical, and pockets 10 and 11 are provided at equal intervals at a plurality of locations in the circumferential direction. As shown in FIG. 4, the annular portion 8 of the cage body 4 includes column portions 12 extending in the axial direction at a plurality of locations in the circumferential direction. The cylindrical member 5 includes column portions 13 extending in the axial direction at a plurality of locations in the circumferential direction. A pocket 10, which is a space formed by adjacent column portions 12 in the circumferential direction of the cage body 4, is provided. A pocket 11, which is a space formed by adjacent column portions 13 in the circumferential direction of the cylindrical member 5, is provided. As shown in FIG. 2, the rollers 3 are accommodated in the pockets 10 and 11 of the cage body 4 and the cylindrical member 5. The cylindrical member 5 is a cage body guide in which both axial end portions of the outer peripheral surface are guided by the inner peripheral surfaces of the flange portions 9 and 9 of the cage body 4. As shown in FIG. 4, in the cage body 4, the portion between adjacent pockets 10 and 10 in the circumferential direction becomes the column portion 12. In the cylindrical member 5, the portion between adjacent pockets 11 and 11 in the circumferential direction becomes the column portion 13. By configuring the cage 2 in this way, it is possible to accommodate the maximum roller diameter and the maximum number of rollers within a limited space.

[0021] <Regarding parameters> · Thickness of the cylindrical member Among the cages 2, the cage body 4 that mainly bears the load by contact with the rollers 3 needs to ensure a predetermined plate thickness. On the other hand, the plate thickness t5 of the cylindrical member 5 is thinner than that of the cage body 4. The plate thickness t5 means the radial thickness of the column portion 13 of the cylindrical member 5. However, depending on the size of the bearing, it becomes difficult to ensure the accuracy determined by deformation during processing without a certain plate thickness for the cylindrical member 5, and as a result, processing becomes difficult.

[0022] Therefore, the plate thickness t5 of the cylindrical member 5 needs to be at least 10% of the roller diameter DSA. Also, if the plate thickness t5 of the cylindrical member 5 is too thick, it will affect the plate thickness of the cage body 4, in other words, the strength. Therefore, it is desirable to keep it within about 20% of the roller diameter DSA. Thus, the plate thickness t5 of the cylindrical member 5 is set so as to satisfy 10% ≤ plate thickness t5 of the cylindrical member 5 ≤ 20% of the roller diameter DSA.

[0023] ·Guide clearance As shown in Fig. 5, in order to use the cylindrical member 5 as a cage body guide so that the shaft 6 and the cylindrical member 5 do not come into contact, the following conditions must be satisfied. Guide clearance δ1 > Guide clearance δ2 + Guide clearance δ3 δ1: (Radial clearance between the shaft 6 and the cylindrical member 5) / 2 δ2: (Radial clearance between the cylindrical member 5 and the cage body 4) / 2 δ3: (Radial clearance between the housing 7 or the outer ring and the cage body 4) / 2

[0024] ·Movement amount of the roller and the holding parts (inside and outside) When assembling the bearing 1 including the cage body 4, the cylindrical member 5, and the roller 3 into the machine in use, the roller 3 must be able to smoothly enter the mating shaft or the portion corresponding to the outer ring raceway surface. Therefore, as shown in Fig. 6, it is necessary to consider the poor assembly caused by the roller 3 entering the inner surface of the column portion 12 of the cage body 4 or the outer surface of the column portion 13 of the cylindrical member 5 in the state of the bearing alone. For this reason, as shown in Fig. 7A, the cage body 4 and the cylindrical member 5 must satisfy all of the following relational expressions (1) to (4).

[0025] B > A …(1) However, in the state of the bearing, the axial centers of the cylindrical member 5 and the cage body 4 may be displaced. Therefore, it is necessary to consider the amount of axial center displacement between the cylindrical member 5 and the cage body 4. B / 2 - C > A / 2 …(2) A: Inner diameter of the column portion 12 between the pockets 10, 10 in the cage body 4 B: Outer circumscribed circle diameter of the roller 3 when the roller 3 is in contact with the column portions 13 adjacent to each other in the circumferential direction of the cylindrical member 5 C: Amount of axial center displacement between the cylindrical member 5 and the cage body 4 Furthermore, as shown in Fig. 7B E > D …(3) However, in the state of the bearing, the axial centers of the cylindrical member 5 and the cage body 4 may be displaced. Therefore, it is necessary to consider the amount of axial center displacement between the cylindrical member 5 and the cage body 4. E / 2 - F > D / 2 …(4) D: Inner diameter of the inscribed circle of roller 3 when roller 3 is in contact with column portion 12 adjacent to it in the circumferential direction of the cage body 4 E: Outer diameter of the cylindrical member 5 F: Amount of axial misalignment between the cylindrical member 5 and the cage body 4

[0026] Since the installation space for the cylindrical member 5 is narrow, it is difficult to secure the cross-sectional area of the column portion 13, and the strength of the cylindrical member 5 is lower than that of the cage body 4. For this reason, as shown in Fig. 8, the circumferential clearance (3)' of the cylindrical member 5, which is the amount of movement of the roller 3 in the circumferential direction with respect to the pocket 11 of the cylindrical member 5, and the circumferential clearance (1)' of the cage body 4, which is the amount of movement of the roller 3 in the circumferential direction with respect to the pocket 10 of the cage body 4, satisfy the following relationship. Circumferential clearance (3)' of the cylindrical member 5 > Circumferential clearance (1)' of the cage body 4 Thereby, the load applied to the cylindrical member 5 can be reduced compared to the load applied to the cage body 4. Thereby, it becomes possible to ensure the strength of the entire cage.

[0027] · Widths of the cage body and the cylindrical member As shown in Fig. 2, since the main bearing 1 may be used for a crankshaft or the like where an induced thrust load is generated, the following conditions are set so that the induced thrust load is not applied to the cylindrical member 5. Width W4 of the cage body 4 > Width W5 of the cylindrical member 5 When the width W4 of the cage body 4 is larger than the width W5 of the cylindrical member 5, even if the roller bearing 1 is used under conditions where an induced thrust load is generated, it is possible to receive the induced thrust load with the cage body 4 having a higher strength than the cylindrical member 5.

[0028] · Incorporation direction of the roller When incorporating the roller 3 into the cylindrical member 5, the amount of movement of the cylindrical member 5 and the roller 3 is large, and it may be difficult to satisfy the condition of the amount of movement between the roller 3 and the holding parts (inside and outside). If the cylindrical member 5 is molded from resin, as shown in Fig. 9, it is easy to suppress the amount of movement by making the cross-section of the column part 13 trapezoidal. However, when performing pocket machining on the cylindrical member 5 by cutting or punching, it may take a long time for the machining. Increasing the inner diameter of the flange part 9 of the cage body 4 shown in Fig. 2 (to a large diameter) can be cited as a countermeasure. However, when the roller bearing 1 is used under the condition that the cage 2 is eccentric and the thrust load is received by the flange part 9, even considering the amount of eccentricity, it is necessary for the width surfaces of adjacent cages 2 to come into contact, so it is difficult to increase the inner diameter of the flange part 9.

[0029] In this case, if the specification is such that the roller 3 is incorporated from the cage body 4 side, the amount of movement is suppressed. When using the bearing 1 at a location where there is no problem even if the inner diameter of the flange part 9 is increased (that is, the flange part 9 does not receive the thrust load), the roller 3 may be inserted from the cylindrical member 5.

[0030] As shown in Fig. 10, the pocket widths WP1 and WP2 at this time shall be widths that satisfy the circumferential clearance. However, if the pocket width is less than 93% of the roller diameter DSA, abnormal conditions may occur on the surface of the roller 3 when incorporating the roller 3, and it cannot be smoothly press-fitted. If the pocket width is 99% or more of the roller diameter DSA, the roller 3 may fall off during transportation. Therefore, when incorporating the roller 3 from the cylindrical member 5, the circumferential pocket width WP2 in the cylindrical member 5 shall be 93% or more and less than 99% of the roller diameter DSA so that the roller 3 does not fall off and is easy to incorporate. Also, when incorporating the roller 3 from the outer diameter of the cage body 4, the circumferential pocket width WP1 in the cage body 4 shall be 93% or more and less than 99% of the roller diameter DSA.

[0031] <Function and effect> According to the roller bearing 1 shown in Fig. 7A described above, by setting B > A, when assembling the roller bearing 1 into a machine to be used or the like, it is possible to prevent the rollers 3 from undesirably entering the inner surface of the column portion 12 in the cage body 4 or the inner surface of the cylindrical member 5. However, in the state of the roller bearing 1, since the axial centers of the cylindrical member 5 and the cage body 4 may be displaced, it is necessary to consider the amount of axial displacement C between the cylindrical member 5 and the cage body 4. According to this configuration, even if there is an amount of axial displacement between the cylindrical member 5 and the cage body 4, by setting B / 2 - C > A / 2, it is possible to prevent in advance the assembly defect that the rollers 3 enter the inner surface of the column portion 12 or the outer surface of the cylindrical member 5.

[0032] Also, as shown in Fig. 7B, by setting E > D, when assembling the roller bearing 1 into a machine to be used or the like, it is possible to prevent the rollers 3 from undesirably entering the outer surface of the cylindrical member 5 or the outer surface of the column portion 12 in the cage body 4. Even if there is an amount of axial displacement between the cylindrical member 5 and the cage body 4, by setting E / 2 - F > D / 2, it is possible to prevent in advance the assembly defect that the rollers 3 enter the outer surface of the cylindrical member 5 or the inner surface of the column portion 12 in the cage body 4. Therefore, when assembling the roller bearing 1 into a machine to be used or the like, the rollers 3 can be smoothly inserted into the mating shaft or the portion corresponding to the outer raceway surface, and the assemblability can be improved.

[0033] <Regarding Other Embodiments> In the following description, parts corresponding to matters described in advance in each embodiment are given the same reference numerals, and duplicate descriptions are omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those in the embodiments described in advance unless otherwise specified. The same configuration exhibits the same operational effects. Not only combinations of parts specifically described in each embodiment, but also partial combinations of embodiments are possible as long as there is no problem with the combination.

[0034] [Second Embodiment] As shown in FIG. 11, it may be a roller bearing 1A in which a cylindrical member 5 is located on the outer diameter side of the cage body 4. The cage body 4 of this roller bearing 1A has an annular portion 8 including a column portion and flange portions 9 extending from both axial ends of the annular portion 8 to the outer diameter side. The cage body 4 and the cylindrical member 5 satisfy all of the above-described relational expressions (1) to (4). B > A …(1) B / 2 - C > A / 2 …(2) E > D …(3) E / 2 - F > D / 2 …(4) However, the symbols A to F in each relational expression are as follows.

[0035] A: Inner diameter of the cylindrical member 5 B: Outer circumscribed circle diameter of the roller 3 when the roller 3 is in contact with the column portions 12 adjacent to each other in the circumferential direction of the cage body 4 C: Amount of axial misalignment between the cylindrical member 5 and the cage body 4 D: Inner inscribed circle diameter of the roller 3 when the roller 3 is in contact with the column portions adjacent to each other in the circumferential direction of the cylindrical member 5 E: Outer diameter of the column portion 12 between the pockets in the cage body 4 F: Amount of axial misalignment between the cylindrical member 5 and the cage body 4 This roller bearing 1A also exhibits the same operational effects as those of the above-described embodiment.

[0036] As described above, the embodiments for implementing the present invention have been described based on the embodiments. However, the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Explanation of Reference Numerals

[0037] 1, 1A... Roller bearing, 2... Cage, 3... Roller, 4... Cage body, 5... Cylindrical member, 7... Housing (counter member), 8... Annular portion, 9... Flange portion, 12... Column portion

Claims

1. A roller bearing comprising a cage and a plurality of rollers held by the cage, wherein the cage has a cylindrical cage body having a surface facing the circumferential surface of the mating member into which the roller bearing is incorporated with a radial clearance therebetween, and a cylindrical member located on the inner diameter side or the outer diameter side of the cage body and arranged concentrically with the cage body, and the cage body has column portions extending in the axial direction at a plurality of locations in the circumferential direction, and the cylindrical member has column portions extending in the axial direction at a plurality of locations in the circumferential direction, pockets of the cage body formed by spaces between column portions adjacent to each other in the circumferential direction and pockets of the cylindrical member formed by spaces between column portions adjacent to each other in the circumferential direction are provided at a plurality of locations in the circumferential direction, and the rollers are accommodated across the pockets of the cage body and the cylindrical member, the cage body and the cylindrical member satisfy the following relationships in the roller bearing. B > A and B / 2 - C > A / 2 E > D and E / 2 - F > D / 2 However, (1) when the cylindrical member is located on the inner diameter side of the cage body, A: Inner diameter of the column portion between pockets in the cage body B: Outer circumscribed circle diameter of the roller when the roller is in contact with column portions adjacent to each other in the circumferential direction of the cylindrical member C: Amount of axial misalignment between the cylindrical member and the cage body D: Inner inscribed circle diameter of the roller when the roller is in contact with column portions adjacent to each other in the circumferential direction of the cage body E: Outer diameter of the cylindrical member F: Amount of axial misalignment between the cylindrical member and the cage body (2) when the cylindrical member is located on the outer diameter side of the cage body, A: Inner diameter of the cylindrical member B: Outer circumscribed circle diameter of the roller when the roller is in contact with column portions adjacent to each other in the circumferential direction of the cage body C: Amount of axial misalignment between the cylindrical member and the cage body D: Inner inscribed circle diameter of the roller when the roller is in contact with column portions adjacent to each other in the circumferential direction of the cylindrical member E: Outer diameter of the column portion between pockets in the cage body F: Amount of axial misalignment between the cylindrical member and the cage body

2. In the roller bearing according to Claim 1, a roller bearing in which a circumferential clearance of the cylindrical member, which is the circumferential movement amount of the roller with respect to the pocket of the cylindrical member, and a circumferential clearance of the cage body, which is the circumferential movement amount of the roller with respect to the pocket of the cage body, satisfy the following relationship. Circumferential clearance of the cylindrical member > Circumferential clearance of the cage body

3. In the roller bearing according to Claim 1 or Claim 2, a roller bearing in which the width of the cage body is larger than the width of the cylindrical member.

4. The roller bearing according to claim 1 or claim 2, wherein a circumferential pocket width in the cage body is 93% or more and less than 99% of the roller diameter.

5. The roller bearing according to claim 1 or claim 2, wherein a circumferential pocket width in the cylindrical member is 93% or more and less than 99% of the roller diameter.

6. The roller bearing according to claim 1 or claim 2, wherein the cage body has an annular portion including the column portion and flange portions extending from both axial ends of the annular portion toward the inner diameter side or the outer diameter side.

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